close

Вход

Забыли?

вход по аккаунту

?

JPH0420865

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH0420865
[0001]
A. Industrial Field of Application The present invention relates to a rotation detection device
useful for use in a so-called headphone-based electroacoustic transducer, a portable video
camera device, and the like. SUMMARY OF THE INVENTION The present invention is a rotation
detecting device for use in an electroacoustic transducer using a so-called headphone, a video
camera apparatus for portable use, etc. By mounting a bimorph board via this and making this
bimorph board output an electrical output corresponding to the rotational angular acceleration
of the rotating member, rotation detection in the high frequency band is not detected, and
rotation detection without harmonic noise is detected. Is designed to be able to Further,
according to the present invention, in the rotation detecting device as described above, the tip
end side in the longitudinal direction of the bimorph plate is supported by the rotating member
rotated and moved together with the detected object, and the rotating shaft of the detected object
is detected. The sensitivity of the rotation detection is enhanced by attaching the positioned
inertia member to the bimorph plate via the elastic member. C1 Conventional Technology
Conventionally, using a so-called headphone device in which a pair of small electro-acoustic
transducers are fitted and supported in the vicinity of both auricles, a natural listening feeling as
if sound waves propagate from the outside In order to realize sound reproduction to be given, a
so-called hinaural method has been proposed. In this heinural method, the right channel signal
originally reproduced only by the right side electro-acoustic transducer is subjected to
predetermined phase conversion and signal level conversion to be supplied to the left side
electro-acoustic converter, The right channel signal reproduced only by the acoustic converter is
subjected to predetermined phase conversion and signal-rechel type conversion to be supplied to
the right electro-acoustic converter. In such a hinaural method, although a good sense of out-ofhead localization can be realized for the sound propagating from the side and the back, a good
sense of out-of-head localization is realized by the sound 9b browing from the front. It was
10-05-2019
1
difficult. And in this pinaural system, as described in Japanese Patent Publication No. 54-1.9242,
detection of rotational movement of the head is performed, and phase conversion is performed
according to the detected rotational movement of the head. It has been proposed that good outof-head localization can be realized for the sound propagating from the front by changing the
constant of the signal-to-cell transformation. In addition, in a portable video camera device,
detection of rotational movement of the video camera device is performed, and predetermined
signal processing is performed on the video signal in response to the detected rotational
movement of the video camera device. It has been proposed that the fluctuation of the image due
to the shake can be corrected.
It should be noted that since such camera shake is repetitive rotation in the horizontal direction
in a low frequency band of a predetermined frequency of 5 Hz to 100 sec or less, if the rotational
movement of the video camera device is detected by frequency selection Can correct the
influence of hand play well. Therefore, conventionally, a rotation detection device has been
proposed that detects rotational movement of a rotation detection object such as a head, for use
in an electro-acoustic conversion device using a pinaural method, a video camera device for
portable use, and the like. That is, in Japanese Patent Publication No. 54-19242, a distance
measuring device comprising a cylinder portion and a piston portion slidably fitted to each other
is used, and one end side of this distance measuring device is one end of the piston on the
shoulder of the user. A device is described which detects the rotational movement of the head of
the user relative to the shoulder of the user by mounting the side and the other end on the head
of the user. There is. Further, in Japanese Patent Publication No. 54-19242, there is described an
apparatus which detects rotational movement of the head of a so-called gyroscoom user. A
rotation detection device configured using such a distance measuring device or a gyroscope is
difficult to miniaturize the device configuration, and, despite being expensive, it accurately
corrects rotational movement such as minute vibration. Can not be detected. In addition, in the
rotation detection apparatus using the said gyroscope, a magnetic needle can be used instead of
this gyroscope. However, in a rotation detection device configured using a magnetic needle, the
response of detection is poor, and accurate rotational movement detection can not be performed.
In addition, the applicant has previously used a sound source indicating a reference position, and
measures the distance to the sound source to detect rotational movement of the head of the user.
We propose a detection device. That is, the rotation detection device includes a pair of
microphone devices attached to the left and right sides of the head of the user, and detects the
phase of the detection sound emitted from the sound source using the microphone devices. The
distance from the sound source to the left and right sides of the user's head is detected. In this
rotation detection device, the rotational movement of the head of the user is calculated based on
the change in the distance from the sound source to the left and right sides of the head of the
user. As described above, it is difficult to miniaturize the rotation detection device configured
using the sound source indicating the reference position so as to include the sound source and be
portable.
10-05-2019
2
Therefore, this rotation detection device can not be configured to be used outdoors or the like.
Furthermore, in Japanese Patent Application Laid-Open No. 63-272300, there is described a
rotation detection device configured using a pair of bimorph plates. The bimorph plate is formed,
for example, by laminating a metal plate on a piezoelectric ceramic, and is configured to generate
an electromotive force by being bent. In this rotation detecting device, the pair of bimorph plates
are attached at a position between the paths of a rotating member which is rotationally moved
along with the object to be rotated at each of the end sides, and is supported in a cantilever
manner. And each of these bimorph boards is making the other end side which becomes a free
end side extend in the opposite direction which mutually faces. The electrodes of these bimorph
plates are produced by the curvatures of the respective bimorph plates caused by the rotation of
the rotating member, that is, the curvatures such that the free ends of the respective bimorph
plates displace in the same rotational direction with respect to the rotating member. The
electromotive forces are connected so as to be added to each other. In this rotation detecting
device, when the rotating member performs rotational movement, the bimorph plates are curved
in response to the angular acceleration of the rotational movement, and an electromotive force
can be obtained according to the curvature. That is, in this rotation detection device, the rotation
speed and the rotation angle position of the detected rotation object can be calculated based on
the electromotive force. In this rotation detection device, when the rotating member moves in
parallel with the object to be rotated, the free ends of the bimorph plates are displaced in
mutually opposite rotational directions with respect to the rotating member. Create a curvature
that At this time, since the electromotive forces generated by these bimorph plates cancel each
other, only rotational movement components that are not affected by the parallel movement
components of the above-mentioned rotating member are detected. By the way, the rotation
detection device configured by using a pair of bimorph plates as described above detects also
rotational movement of high frequency band such as fine vibration of the rotation detection
object. Resulting in. When this rotation detection device detects rotational movement in a high
frequency band, so-called harmonic noise is included in the detection output, and therefore, the
detection output does not undergo signal processing using a low pass filter or the like. It can not
be used as a signal representing the rotational movement of the rotation detection object.
Further, in this rotation detection device, it is difficult to lower the low frequency cutoff
frequency for detecting the rotational movement so that the rotational movement of the low
frequency can be detected.
Furthermore, in this rotation detection device, since the bimorph plate does not produce a curve
larger than the amount of bending determined according to the mass of the bimorph plate when
the rotating member rotates, detection sensitivity of the rotational movement It is difficult to
improve And this rotation detection equipment! In each of the bimorph plates, one end is
cantilevered from the rotating member, and therefore, when an impact is applied from the
10-05-2019
3
outside, the breakage of the one end of the bimorph plate or the rotation There is a spread that
causes the member to come off. Therefore, the present invention has been proposed in view of
the above-described circumstances, and is accurate and sensitive over a wide frequency band
including a low frequency band without being affected by the rotation of a high frequency band.
An object of the present invention is to provide a rotation detection lx capable of detecting the
rotational movement of a detection target to be rotated and having good durability against an
impact or the like. E9 Means for Solving the Problems In order to solve the above problems and
achieve the above object, the rotation detection device according to the present invention is
mounted via an elastic member to a rotating member that is rotationally moved together with the
detected rotation object. The bimorph plate is formed by outputting an electric output according
to the rotational angular acceleration of the rotating member. The rotation detecting device
according to the present invention is characterized in that the bimorph plate supported at the tip
end side in the longitudinal direction by the rotating member rotationally moved with the object
to be rotated, the bimorph plate positioned on the rotation axis of the object to be rotated An
inertial member attached to an emboss plate via an elastic member is provided, and the bimorph
plate is configured to output an electrical output according to the rotational angular acceleration
of the rotating member. F8 Operation In the rotation detecting device according to the present
invention, the bimorph plate attached via the elastic member to the rotating member which is
rotationally moved together with the object to be rotated is curved when the rotational angular
acceleration of the rotating member is generated. And outputs an electrical output corresponding
to the rotational angular acceleration. Further, since the elastic member absorbs the rotation of
the high frequency band of the rotating member, the bimorph plate is not curved due to high
frequency vibration or the like of the object to be rotated. Then, in the rotation detection device,
the tip end side in the longitudinal direction of the bimorph plate is supported by the rotating
member, and the inertia member is positioned on the rotation axis of the object to be rotated and
attached to the bimorph plate via the elastic member. Since the amount of bending of the
bimorph plate per rotational angular velocity of the rotating member becomes larger according
to the mass of the inertial member, the detection sensitivity of the rotational movement is
improved.
G. Examples Hereinafter, specific examples of the present invention will be described with
reference to the drawings. The rotation detection device according to the present invention is, for
example, a device that detects a rotational angular acceleration of a rotation detection object
such as the head of a user. As shown in FIG. 1, this rotation detection device is configured to have
a bimorph plate 1. The bimorph plate 1 is configured by bonding a pair of first and second
monomorph plates lalb sandwiching a common terminal plate 2 made of a thin metal plate. Each
of the monomorph plates 1a and 1b is made of, for example, a piezoelectric ceramic, and is
configured to generate an electromotive force between one surface side and the other surface
side by being curved in the thickness direction. The poling direction of the first monomorph plate
1a is, as shown by arrows A and B in FIG. 2, a direction from the side of the common terminal
10-05-2019
4
plate 2 toward the surface side which is one surface side of the bimorph plate 1 It is done. The
poling direction of the second monomorph plate 1b is the same as that of the first monomorph
plate 1a, that is, as shown by the arrow C and the arrow in FIG. The direction is from the front
surface side to the common terminal board 2 side. As shown in FIGS. 1 and 2, on each surface of
the bimorph plate 1, a plurality of electrodes each made of a conductive thin film are deposited.
That is, on the surface portion of the first monomorph plate 1a which is one surface side of the
bimorph plate l, the first and second electrodes 3.4 are formed so as to be polarized on both
sides in the longitudinal center position. There is. Further, on the surface portion of the second
monomorph plate 1b, which is the other side of the bimorph plate 1, polarized on both sides in
the longitudinal center position, third and fourth electrodes 5.6 are formed. ing. The bimorph
plate 1 is supported at its longitudinal center position on a rotating member 7b which is
rotationally moved with the object to be rotated, via a plurality of plate members 13 serving as
elastic members and a holding member 7a. The rotating member 7b is attached to the base end
side or to the object to be rotated. The plurality of plate members 213 are arranged in a slightly
bent state over the distal end side of the rotating member 7b and the proximal end side of the
holding member 7a. That is, these plate fins 13 transmit rotational movement about the axial
center of the rotating member 7b to the holding member 7a while elastically deforming. In the
transmission of rotational movement by the plurality of plate blades 213, rotational movement of
a high frequency band higher than a predetermined frequency is absorbed by each plate blade
13 according to the blade constant of the plate blade 13. It is not transmitted.
The holding member 7a is formed in a substantially cylindrical shape, and by providing the
holding groove portion 8 having a width substantially equal to the thickness of the bimorph plate
1, the tip end side is bifurcated. The bimorph plate 1 has a longitudinal central portion inserted
into the holding groove portion 8 so that the longitudinal direction is substantially orthogonal to
the axis of the holding member 7a and is supported by the holding member 7a. The electrodes 3
and 4 and 5.6 are connected such that electromotive forces generated by the curvature of the
bimorph plate 1 generated by the rotation of the rotating member 7 shown in FIGS. 3 and 4 are
added to each other It is done. That is, the first electrode 3 and the third electrode 5 are
connected to the first voltage lead-out terminal 9. The second electrode 4 and the fourth
electrode 6 are connected to a second voltage output terminal lO. The rotation detection device
according to the present invention configured as described above detects a rotational angular
acceleration around the axis of the holding member 7a indicated by the arrow R in FIG. 1 of the
object to be rotated. That is, in this rotation detecting device, as shown in FIG. 3, when the
rotating member 7b starts to be rotated in the first direction shown by the arrow R2 in FIG. 4
with a frequency equal to or less than a predetermined frequency, the bimorph plate Both ends
of 1 are curved by inertia so as to be rotated in a second direction opposite to the first direction,
as shown by arrows x1 and X2 in FIG. 3, respectively. At this time, portions in the vicinity of the
first electrode 3 and the fourth electrode 6 are displaced so as to be compressed as indicated by
arrows S in FIG. Further, portions near the second electrode 4 and the third electrode 5 are
10-05-2019
5
arrows in FIG. 3 respectively. It is displaced as it is stretched. Therefore, a negative potential is
generated at the first voltage output terminal 9 and a positive potential is generated at the
second voltage output terminal 10. Then, in this rotation detecting device, as shown in FIG. 4,
when the rotating member 7b starts to be rotated in the second direction shown by the arrow R2
in FIG. 4 with a frequency equal to or less than a predetermined frequency, the bimorph plate
Both ends of 1 are curved by inertia so as to be rotated in a first direction opposite to the second
direction, as shown by arrows Y and Y2 in FIG. 4, respectively. At this time, portions in the
vicinity of the first electrode 3 and the fourth electrode 6 are arrows in FIG. 4 respectively. It is
displaced as it is stretched. Further, portions in the vicinity of the second electrode 4 and the
third electrode 5 are displaced so as to be compressed as indicated by an arrow S in FIG.
Therefore, plus y and @ are generated at the first voltage lead-out terminal 9, and a negative
potential is generated at the second voltage lead-out terminal 10. In this manner, the voltage
extracted from the first and second voltage output terminals 9.10 is the rotational angular
acceleration of the rotating member 7 about the axis of the holding member 7a, ie, the rotation
detection object It corresponds to the rotational angular acceleration about the axis. When this
rotation detection device is shown by an equivalent circuit, as shown in FIG. 11, two capacitors
C1C are connected in parallel to the first voltage lead-out terminal 9, and each capacitor C2C is
further connected in parallel with each other. The two capacitors C9C connected in series are
connected in series, and the second voltage output terminal 10 is connected to the two
capacitors C1C. In this equivalent circuit, each of the capacitors c, c, c, c has an electric capacity
between the first electrode 3 and the common terminal plate 2, an electric capacitance between
the second electrode 4 and the common terminal plate 2. The electric capacitance between the
third electrode 5 and the common terminal plate 2 and the electric capacitance between the
fourth electrode 6 and the common terminal plate 2 are shown. That is, assuming that the
electric capacitances of the capacitors c, c, c, c are C and l, respectively, and the potential
difference stored in the capacitors 01 CC 2 C by the curvature of the bimorph plate l is e, in this
rotation detection device The capacitance is C, and an electromotive force of 2e can be obtained.
The rotation detecting device according to the present invention is not limited to the abovedescribed embodiment, and as shown in the fifth time, the poling directions of the monomorph
plates + a and Ib may be configured to be opposite to each other. . That is, in this rotation
detection device, the poling direction of the first monomorph plate 1a is one surface of the
bimorph plate 1 from the side of the common terminal plate 2 as shown by arrows A and B in
FIG. The direction is toward the front side which is the side. The poling direction of the second
monomorph plate 1b) is the direction opposite to the poling direction of the first monomorph
plate 1a, that is, as shown by arrow E and arrow F in FIG. The direction from the side of the
terminal plate 2 to the surface side which is the other surface side of the bimorph plate 1 is
made. Also in this one rotation detection device, the electromotive forces generated by the
bending of the bimorph plate 1 generated by the rotation of the rotating member 7b shown in
FIG. It is connected to
10-05-2019
6
That is, the second electrode 4 and the third electrode 5 are connected to the first voltage leadout terminal 9. The first electrode 3 and the fourth electrode 6 are connected to a second voltage
output terminal 10. In the rotation detecting device according to the present invention
configured as described above, as shown in FIG. 6, the rotating member 7b rotates with a
frequency equal to or less than a predetermined frequency in the first direction indicated by the
sixth arrow R1. The bimorph plate 10 is rotated by inertia in a second direction opposite to the
first direction as indicated by arrows X1 and X2 in FIG. 6, respectively. It is curved. At this time,
portions in the vicinity of the first electrode 3 and the fourth electrode 6 are displaced so as to be
compressed as shown by the arrows S in FIG. Further, the portions in the vicinity of the second
electrode 4 and the third electrode 5 are displaced so as to be extended as indicated by arrows P
in FIG. 6, respectively. Therefore, a positive potential is generated at the first voltage output
terminal 9 and a negative potential is generated at the second voltage output terminal 10. Then,
in the rotation detecting device, when the rotating member 7 b starts to rotate in the second
direction, a negative potential is applied to the first voltage lead-out terminal 9 and a second
potential is applied to the second voltage lead-out terminal 10. Each produces a positive
potential. As in the second embodiment, also in this rotation detection device, the first and
second voltage output terminals 9 and 10 correspond to the rotational angular acceleration
around the axis of the holding member 7a of the object to be detected for rotation. It is possible
to take out the voltage. When this rotation detection device is shown by an equivalent circuit, as
shown in FIG. 11, two capacitors C and C are connected in parallel to the first voltage lead-out
terminal 9, and each of these capacitors 02 C is further connected. The two capacitors C2C
connected in parallel to each other are connected in series, and the second voltage extraction
terminal 1o is connected to the two capacitors C1C. That is, assuming that the capacitance of
each of the capacitors c, c, c, c is C, and the potential difference stored in the capacitors c, c, c, c
by the curvature of the bimorph plate 1 is e, the rotation detection In the device, the capacitance
is C, and an electromotive force of 2e can be obtained. Furthermore, as shown in FIG. 7, in the
rotation detecting device according to the present invention, the poling directions of the
monomorph plates 1a and 1b are configured to be opposite to each other on one end side and
the other end side. May be
That is, in this rotation detection device, the poling direction of the first monomorph plate 1a is
the same as indicated by arrow A in FIG. 7 at one end side where the first electrode 3 is provided.
As shown by the arrow G in FIG. 7, the other end side on which the second electrode 4 is
provided has a direction from the terminal plate 2 side toward the surface side which is one
surface side of the high molar 2 plate 1. The direction from the surface side, which is one surface
side of the bimorph plate I, toward the common terminal plate 2 is set. The poling direction of
the second monomorph plate 1b is, as shown by the arrow C in FIG. 7, the bimorph on the one
end side where the third electrode 5 is provided. In the other end side where the fourth electrode
10-05-2019
7
6 is provided, as indicated by an arrow F in the seventh review, the direction is from the surface
side which is one surface side of & 1 toward the common terminal plate 2 side. The direction
from the side of the common terminal plate 2 to the front surface side which is one surface side
of the bimorph plate 1 is made. In this rotation detecting device, the electromotive force
generated by the curvature of the bimorph plate 1 generated by the rotation of the rotating
member 7b shown in FIG. They are connected to be added to each other. That is, the common
terminal board 2 is connected to the first voltage lead-out terminal 9. The first to fourth
electrodes 3.4.5.6 are connected to the second voltage output terminal 10. The first electrode 3
and the second electrode 4 are connected to each other by a first connecting wire 11. In this
case, the first electrode 3 and the second electrode 4 may be formed continuously with each
other. Further, the third electrode 5 and the fourth electrode 6 are connected to each other by a
second connecting wire 12. The third electrode 5 and the fourth electrode 6 may be formed to be
continuous with each other. In the rotation detecting device according to the present invention
configured as described above, as shown in FIG. 8, the rotating member 7b rotates with a
frequency equal to or less than a predetermined frequency in a first direction shown by arrow R1
in FIG. When it is started, both ends of the bimorph plate 1 are rotated by inertia in a second
direction opposite to the first direction, as indicated by arrows χ 1 and X 2 in FIG. 8,
respectively. Curved. At this time, portions in the vicinity of the first electrode 3 and the fourth
electrode 6 are displaced so as to be compressed as shown by arrows 2 in FIG. Further, portions
in the vicinity of the second electrode 4 and the third electrode 5 are displaced so as to be
extended as shown by arrows 2 in FIG. 8, respectively.
Therefore, a positive potential is generated at the first voltage output terminal 9 and a negative
potential is generated at the second voltage output terminal 10. Then, in the rotation detecting
device, when the rotating member 7b starts to be rotated in the second direction with a
frequency equal to or less than a predetermined frequency, a potential of minus is detected in the
first voltage lead terminal A positive potential is generated at the voltage output terminal 10 of 2,
respectively. In this manner, also in this rotation detection device, a voltage corresponding to the
rotational angular acceleration of the object to be detected for rotation about the axis of the
holding member 7a is obtained from the first and second voltage lead terminals 9 and 10. It can
be taken out. When this rotation detection device is shown by an equivalent circuit, as shown in
FIG. 12, four capacitors c, c, c, c are connected in parallel to the first voltage lead terminal 9, and
each capacitor cccc is connected The second voltage output terminal IO is connected. In this
equivalent circuit, each of the capacitors c, c, c and c has the same first to fourth electrodes
3.4.5.6 and the common terminal plate as in the equivalent circuit shown by the 1111iJ. The
electric capacity between 2 is shown. That is, in this rotation detection device, the electric
capacity is 40 and an electromotive force of e can be obtained. In this rotation detection device,
when connection is made to increase the electric capacity between the second and second
voltage lead terminals 9.10 as described above, the low cutoff frequency for detection of
rotational movement is lowered. It is possible to accurately detect the rotational movement of a
10-05-2019
8
wide frequency band including the low frequency band. In the rotation detecting device
according to the present invention, as shown in FIG. 9, the poling directions of the monomorph
plates 1a and 1b are opposite to each other at one end and the other end, and It may be
configured in such a way that the polling directions of 1ab are in the direction of G2 facing each
other. That is, in this rotation detecting device, the poling direction of the first monomorph plate
1a is, as shown by the arrow in FIG. 9, at one end side where the first electrode 3 is provided. The
direction from the side of the common terminal plate 2 toward the surface side which is the one
surface side of the bimorph plate 1 is as shown by the arrow G in FIG. 9 on the other side where
the second electrode 4 is provided. The direction from the surface side of the bimorph plate 1
toward the common terminal plate 2 is from the surface side, and the poling direction of the
second monomorph plate 1b is the third electrode. At one end side where 5 is provided, as shown
by the arrow E in FIG. 9, the direction from the side of the common terminal plate 2 to the
surface side which is one surface side of the bimorph plate 1 is made, On the other end side
where the electrode 6 of , As indicated by the arrow H in FIG. 9 has been made to the direction
toward the side of the common terminal plate 2 from the surface side which is one side of the
bimorph plate 1.
In this rotation detection device, the electromotive forces generated by the bending of the
bimorph plate 1 generated by the rotation of the rotating member 7b shown in FIG. As
connected. That is, the third electrode 5 and the fourth voltage i6 are connected to the first
voltage lead terminal 9. The first electrode 3 and the second electrode 4 are connected to the
second voltage output terminal 10. The first electrode 3 and the second electrode 4 are
connected to each other by a first connecting wire 11. In this case, the first electrode 3 and the
second electrode 4 may be formed continuously with each other, and the third electrode 5 and
the fourth electrode 6 have a second connection. They are connected to each other by the lead
wires 12. The third electrode 5 and the fourth electrode 6 may be formed to be continuous with
each other. In the rotation detecting device according to the present invention configured as
described above, as shown in FIG. 10, the rotating member 7b rotates with a frequency equal to
or less than a predetermined frequency in a first direction shown by arrow R3 in FIG. The
bimorph plate 1 has opposite ends in the first direction, as indicated by arrows X1 and X2 in FIG.
10, respectively, due to the inertia according to tI of the bimorph plate 1. It is curved to be
rotated in a second direction. At this time, portions in the vicinity of the first electrode 3 and the
fourth electrode 6 are displaced so as to be compressed as shown by the arrows S in FIG. Further,
portions in the vicinity of the second electrode 4 and the third electrode 5 are arrows in FIG. It is
displaced as it is stretched. Therefore, a positive potential is generated at the first voltage output
terminal 9 and a negative potential is generated at the second voltage output terminal 10. Then,
in the rotation detecting device, when the rotating member 7b starts to be rotated in the second
direction with a frequency equal to or lower than the predetermined frequency, a negative
potential is generated in the first voltage lead-out terminal 9, the second voltage A positive
potential is generated at the voltage output terminal 10 of In this manner, also in this rotation
10-05-2019
9
detection device, the voltage corresponding to the rotational angular acceleration around the axis
of the holding member 7a of the object to be detected for rotation is obtained from the first and
second voltage lead terminals 9.10. It can be taken out. When this rotation detection device is
shown by an equivalent circuit, as shown in FIG. 11, two capacitors C2C are connected in parallel
to the first voltage lead-out terminal 9, and each capacitor C1C is further connected in parallel
with each other. The two capacitors C1C connected in series are connected in series, and the
second voltage extraction terminal 1o is connected to the two capacitors C9C.
That is, assuming that the electric capacitance of each of the capacitors c, c, c, c is C, and the
potential difference stored in the capacitors c, c, c, c by the curvature of the bimorph vil is e, the
rotation detection device In the above, the capacitance is C, and an electromotive force of 2e can
be obtained. In the rotation detecting device according to the present invention, as shown in
FIGS. 13 and 14, the bimorph plate 1 has both end sides in the longitudinal direction, that is, one
end side and the tip end side of the other end side. It may be configured to be supported by a
rotating ring 15 that is a rotating member that is rotationally moved with the rotation detection
object. The rotary ring 15 is formed in an annular shape having an inner diameter substantially
equal to the length of the bimorph plate 1 by a material such as a metal or a constituent resin.
The rotation ring 15 is provided with a pair of support holes 15a, 15a at angular intervals of 180
°, that is, at positions opposed to each other across the axial center of the rotation ring 15. The
support holes 15a, 15a are formed to have a length substantially equal to the width of the
bimorph plate 1 and a width slightly larger than the thickness of the bimorph plate 1 so that the
bimorph plate 1 can be inserted. The bimorph plate 1 is disposed so as to be passed through the
rotating ring 15, and both ends thereof are inserted corresponding to the support holes 15 a and
15 a, respectively. It is supported via first to fourth coil flies 16.17 and 18.19. The first coil fly
16 is stretched between the one surface side of the bimorph plate 1 and the rotation ring 15. The
second coil fly 17 is stretched between the other surface of the bimorph plate 1 and the rotation
ring 15. The third coil spring 18 is stretched between the other surface of the bimorph plate 1
and the rotation ring 15. The fourth coil spring 19 is stretched between the other side of the
other side of the bimorph plate 1 and the rotation ring 15. The bimorph plate 1 is supported with
its longitudinal center position located on the axial center of the rotating ring 15 and its width
direction parallel to the axial center of the rotating ring 15. Further, the rotating ring 15 is
provided with a plurality of legs 15b for attaching the rotating ring 15 to the object to be rotated.
Further, an inertia member 14 is attached to a longitudinal center position of the bimorph plate
1, that is, a position on the axis of the rotating ring 15.
The inertia member 14 is formed of a material having an appropriate density and having a
predetermined mass in a substantially cylindrical shape. The inertia member 14 is provided with
a holding hole through which the axial center of the inertia member 14 can be inserted so that
the bimorph plate 1 can be inserted. The inertia member 14 is made coaxial with the rotation
10-05-2019
10
ring 15 by inserting the bimorph plate 1 into the supported hole, and is supported by the
bimorph plate 1. In this rotation detection device, when the rotating ring 15 is rotationally
moved by the rotational movement of the to-be-rotated object, the bimorph plate 1 is rotationally
moved along with the rotating ring 15 at both tip sides, and in the longitudinal direction Since
the central portion is held in the initial position by inertia according to the mass of the inertia
member 14, both tip sides are curved so as to be moved in the same rotation direction as the
rotation direction of the rotation ring 15. In this rotation detection device, the bimorph plate 1 is
bent as described above, whereby the bimorph plate 1 outputs an electrical output
corresponding to the rotational angular acceleration of the detected rotation target. Further, as
shown in FIGS. 15 and 16, the rotation detecting device according to the present invention is
supported by a rotating ring 15 serving as a rotating member which is rotationally moved at both
ends in the longitudinal direction along with the object to be rotated. The inertia member may be
attached to the longitudinal center position of the bimorph plate 1 via an elastic member. The
rotary ring 15 is formed in an annular shape having an inner diameter substantially equal to the
length of the bimorph plate 1 by a material such as a metal or a constituent resin as in the abovedescribed embodiment. The rotation ring 15 is provided with a pair of support holes 15 b and 15
c at an angular interval of 180 °. The support holes 15b 15c are formed to have a length
substantially equal to the width of the bimorph plate 1 and a width substantially equal to the
thickness of the bimorph plate 1 so that the bimorph plate 1 can be inserted. The bimorph plate
1 is disposed so as to be passed through the rotating ring 15, and is supported by the rotating
ring 15 with the both end sides inserted corresponding to the support holes 15b and 15c. The
bimorph plate 1 is supported with its longitudinal center position located on the axial center of
the rotating ring 15 and its width direction parallel to the axial center of the rotating ring 15. The
first and second inertia members 20.22 forming a pair are provided at the longitudinal center
position of the bimorph plate 1, that is, at a position on the axial center of the rotating ring 15,
the support member 21 and the elastic member. It will be attached via a plurality of plate Hane
23.24.
These inertia members 20.22 are formed of a material having an appropriate density and having
a predetermined mass in a substantially disk shape. The support member 21 is formed in a
substantially cylindrical shape, and a holding hole through which the bimorph plate 1 can be
inserted is provided so as to penetrate the axial center of the support member 21. The support
member 21 is made coaxial with the rotating ring 15 by inserting the bimorph plate 1 into the
supported hole, and is supported by the bimorph plate 1. And each said inertia member 20.22 is
each supported by the both end side of the said supporting member 21 correspondingly. The
plurality of plate fins 23 are disposed in a slightly bent state across one end side of the rotating
member 21 and the first inertia member 20, respectively. Further, the plurality of plate fins 24
are disposed in a slightly bent state across the other end side of the rotating member 21 and the
second inertia member 22 respectively. That is, the plurality of leaf springs 23.24 transmit the
rotational movement of the bimorph plate 1 about the axis of the support member 21 to the
10-05-2019
11
inertial members 20.22 while being elastically deformed. In transmission of rotational movement
by the plurality of plate splashes 2324, rotational movement of a high frequency band higher
than a predetermined frequency is performed according to the plurality of plate feathers 23.24
according to the constant of the plurality of plate splashes 23.24. Absorbed at 23.24 and not
transmitted. In this rotation detection device, when the rotating ring 15 is rotationally moved by
the rotational movement of the to-be-rotated object, the bimorph plate 1 is rotationally moved
along with the rotating ring 15 at both tip sides, and in the longitudinal direction Since the
central portion is held at the initial position by inertia corresponding to the mass of each of the
inertia members 20.22, both tip sides are curved so as to be moved in the same rotation direction
as the rotation direction of the rotation ring 15. In this rotation detection device, the bimorph
plate 1 is bent as described above, whereby the bimorph plate 1 outputs an electrical output
corresponding to the rotational angular acceleration of the object to be rotated. In the rotation
detection device according to the present invention configured as shown in each of the abovementioned embodiments, the elastic member is not limited to a plate spring or coil lotus as
shown in the above-mentioned embodiments, and rubber or synthetic resin It may be formed, for
example, as a ring-like bush by a material having elasticity and flexibility, etc. The rotation
detection device according to the present invention configured as described above is used by
being attached to a so-called hunt portion of a so-called headphone device.
This headphone device is configured by connecting the pair of electro-acoustic transducers for
the left ear and the electro-acoustic transducers tfA for the right ear by means of the hand-held
portion. In the headphone device, the headband portion is attached to the head of the user to
position and support the electro-acoustic transducer for the left ear in the vicinity of the user's
left auricle and to support the right An ear electro-acoustic transducer is positioned and
supported near the right auricle of the user. The rotation detection device is attached to the
headphone device by attaching the base end side of the rotation member 7b or the leg portion
15b of the rotation ring 15 above the substantially central portion of the head hand portion. As
described above, when the rotation detecting device according to the present invention is
attached to the headphone device, the rotational movement of the head on which the headphone
device is attached can be detected. Then, using the signal processing device, the phase and sound
level of the sound reproduced by each of the ear electro-acoustic transducers are changed in
response to the rotational movement of the head detected by the rotation detection device. By
performing the signal processing of (1), it is possible to perform good sound reproduction
without so-called in-head localization feeling. In addition, when the rotation detection device
according to the present invention is attached to a portable video camera device, the video signal
is processed in response to the so-called rotational movement of the video camera device by
hand so that the fluctuation of the image is corrected. Can be applied to the As described above,
in the rotation detecting device according to the present invention, the bimorph plate attached
via the elastic member to the rotating member that is rotationally moved with the object to be
rotated has the rotation angle of the rotating member. When acceleration occurs, it is curved
10-05-2019
12
according to this rotational angular acceleration. Therefore, in this rotation detection device, the
bimorph plate can be used to output an electrical output corresponding to the rotational angular
acceleration. Further, since the elastic member absorbs the rotation of the high frequency band
of the rotating member, the bimorph plate is not curved due to high frequency vibration or the
like of the object to be rotated. Further, in the rotation detection device, the tip end side in the
longitudinal direction of the bimorph plate is supported by the rotating member, and the inertia
member is positioned on the rotation axis of the object to be rotated and attached to the bimorph
plate via the elastic member. According to the mass of the inertia member, the amount of
bending of the bimorph plate per rotational angular velocity of the rotation member becomes
large. Therefore, if the rotation detection device according to the present invention is configured
using the inertia member in this way, the detection sensitivity of the rotational movement can be
improved, and in the rotation detection device according to the present invention, the bimorph
plate is mounted on the bimorph plate. The electrodes to be formed can be easily connected so as
to increase the capacitance, and the low cutoff frequency can be lowered to well detect rotational
movement of the low frequency band.
Furthermore, in the rotation detection device according to the present invention, the bimorph
plate can be configured to be easily supported at both ends instead of so-called cantilever
support, so breakage or detachment of the bimorph plate due to impact or the like Good
durability can be realized. That is, according to the present invention, it is possible to detect the
rotational movement of an object to be detected, which is accurate and sensitive over a wide
frequency band including a low frequency band, without being influenced by the rotation of a pit
frequency and It is possible to provide a rotation detection device having good durability even in
the case of 4、
[0002]
Brief description of the drawings
[0003]
1 is a perspective view showing the configuration of a rotation detection device according to the
present invention, FIG. 2 is a plan view showing the configuration of the rotation detection
device, and FIG. 3 is a first rotation of the rotation detection device. It is a top view which shows
the state which is detecting the direction, FIG. 4 is a top view which shows the state which the
said rotation detection apparatus has detected the 2nd rotation direction.
10-05-2019
13
FIG. 5 is a plan view showing the configuration of a rotation detection device according to the
present invention having a polling direction different from that of the rotation detection device
shown in FIG. 1, and the sixth time is the rotation detection device shown in FIG. Is a plan view
showing a state in which a first rotation direction is detected. Seventh is a plan view showing the
configuration of a rotation detection device according to the present invention having a polling
direction different from that of the rotation detection device shown in the 50th above, and FIG. 8
is a rotation detection device shown in FIG. It is a top view which shows the state which is
detecting the 1st rotation direction. FIG. 9 is a plan view showing the configuration of a rotation
detection device according to the present invention having a poling direction different from the
rotation detection device shown in the seventh time, and FIG. 10 is a rotation detection device
shown in the ninth line. Is a plan view showing a state in which a first rotation direction is
detected. FIG. 11 is a circuit diagram showing an equivalent circuit of the rotation detecting
device shown in FIGS. 2, 5 and 9, and the twelfth time the equivalent circuit of the rotation
detecting device shown in FIG. It is a circuit diagram shown. FIG. 13 is a perspective view
showing the structure of a rotation detecting device according to the present invention in which
an elastic member is disposed between a bimorph plate and a rotating ring, and FIG. 14 is the
rotation shown in FIG. It is a top view which shows the structure of a detection apparatus. FIG. 15
is a perspective view showing the configuration of a rotation detection device according to the
present invention in which an elastic member is disposed between a bimorph plate and a inertia
member, and FIG. 16 is the rotation shown in FIG. It is a top view which shows the structure of a
detection apparatus.
10-05-2019
14
Документ
Категория
Без категории
Просмотров
0
Размер файла
31 Кб
Теги
jph0420865
1/--страниц
Пожаловаться на содержимое документа