close

Вход

Забыли?

вход по аккаунту

?

JP2001337172

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 JP2001337172
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
ultrasonic detector installed in a bumper or the like of a vehicle to detect an obstacle.
[0002]
2. Description of the Related Art In the prior art, there are bumpers and the like of automobiles
equipped with a corner sensor provided with an ultrasonic sensor for detecting an obstacle and
an ultrasonic detector called a back sonar. 9 to 11 are views showing a conventional ultrasonic
detector, FIG. 9 is a front view, FIG. 10 is a plan view, and FIG. 11 is a sectional view taken along
line HH of FIG.
[0003]
In FIG. 9 to FIG. 11, reference numeral 1 denotes a transducer of the ultrasonic sensor, which is
covered by the buffer material 2 and the sheet 3. The periphery of the vibrator 1 is fitted to the
housing 4 via the cushioning material 2. The back surface of the vibrator 1 is electrically
connected to the substrate 6 through the lead wire 5. The control circuit 7 and the harness 8 are
disposed on the substrate 6. A back cover 9 is disposed on the back side of the housing 4 to close
it.
03-05-2019
1
[0004]
FIG. 12 is a vibration characteristic diagram showing a detectable range of the vibrator 1 when
the shock absorbing material 2, the sheet 3 and the housing 4 are not installed around the
vibrator 1. As shown in FIG. The vibration characteristic diagram shown in FIG. 12 represents the
original detectable range of the vibrator 1 itself, and the distance at which an object can be
detected is 90 cm in the horizontal direction and 86 cm in the vertical direction. It is. In this case,
since the vibrator 1 is not covered and pressed with the buffer material 2 or the sheet 3 around,
the vibrator 1 vibrates freely to emit an ultrasonic wave, so that the detectable range is wide.
[0005]
However, the vibrator 1 of the above-mentioned ultrasonic detector usually covers the front
periphery of the vibrator 1 with a shock absorbing material 2 as shown in FIGS. It is installed
internally. When the vibrator 1 of the ultrasonic detector covers and fixes the front periphery of
the vibrator 1 with the buffer material 2, as shown in the vibration characteristic diagram of FIG.
Since the vibrator 1 is prevented from vibrating freely by the buffer material 2 and the housing
4, the vibrator 1 is degraded to 80 cm in the left and right direction and to 70 cm in the vertical
direction. Especially when the sensor is miniaturized and the circumference of the transducer is
covered and fixed by the thin-walled housing 4, the deterioration of the vibration characteristics
is particularly large, and the original detection range characteristics (FIG. 12) of the ultrasonic
transducer 1 are extracted. There is a problem that there is no.
[0006]
For this reason, the conventional ultrasonic detector has the capability of the detection distance
and detection range originally possessed by the vibrator 1 lost by fixing the buffer material 2, the
sheet 3 and the housing 4 around the vibrator 1. In order to maintain the size of the ultrasonic
detector, the entire size of the ultrasonic detector must be increased. However, when the size of
the ultrasonic detector is increased, a large hole is bored in the bumper to install the ultrasonic
detector, so that the strength of the bumper is lowered and the appearance is deteriorated.
[0007]
Moreover, even if the conventional ultrasonic detector enlarges the whole range which can detect
03-05-2019
2
an object even if it enlarges the whole ultrasonic detector, a detection capability becomes wide
not only in the horizontal direction but also in the up-down direction, and the road surface There
is a problem that false detection as an object occurs.
[0008]
An object of the present invention is to provide an ultrasonic wave detector whose detection
distance and detection range are expanded and its function is improved.
[0009]
SUMMARY OF THE INVENTION The present invention has been invented to solve the problems
of the prior art described above, and the invention of claim 1 relates to a transducer having an
approximately cylindrical shape that receives and transmits ultrasonic waves. In an ultrasonic
sensor having a shock absorbing material covering a side surface of the vibrator and a housing
disposed around the shock absorbing material and containing the shock absorbing material, the
ultrasonic sensor is a front side of the vibrator. A space A is formed around the periphery.
[0010]
In the invention of claim 2, in the invention of claim 1, the space A is an annular groove formed
between the open end of the front side housing and the vibrator.
[0011]
According to the invention of claim 3, in the invention according to claim 2, the surface of the
vibrator and the open end of the housing are disposed flush with each other, and the surface of
the cushioning material is the surface of the vibrator and the surface It is disposed at a position
recessed from the open end of the housing.
[0012]
The invention according to claim 4 relates to the invention according to claim 2 or 3, wherein the
annular groove is an arc-shaped groove formed in the vibrator, a protrusion projecting from an
inner open end of the housing, and the vibrator And a gap formed by the outer wall of the
[0013]
According to the invention of claim 5, in the invention according to claim 2 or 3, the annular
groove is an arc-shaped groove formed in the vertical direction of the vibrator, and a housing
from the surface of the cushioning material in the annular groove. And a gap formed by the
03-05-2019
3
protruding portions projecting to the left and right portions of the inner open end and the outer
wall of the vibrator.
[0014]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment The first
embodiment of the present invention will be described in detail with reference to FIGS. 1 to 3.
FIG.
In FIGS. 1 to 3, reference numeral 10 denotes an ultrasonic sensor which is implanted in a
bumper or the like of a car to detect an obstacle or the like.
The ultrasonic sensor 10 is, for example, an object or an object using ultrasonic waves referred to
as an obstacle detection sensor, a proximity sensor, a corner sensor, a back sensor, a vehicle
height sensor, a road surface sensor, a human body detection sensor and the like. It is used for
various sensors which detect distance.
When the ultrasonic sensor 10 is installed and used in a bumper of a car, six to eight ultrasonic
sensors are installed in the left and right central portions of each bumper on the front and rear
sides of the vehicle body to detect an obstacle or the obstacle Detect the distance to
[0015]
An oscillator 11 for receiving and transmitting an ultrasonic wave has a cylindrical shape, and a
vibration element for receiving and transmitting an ultrasonic wave is provided inside the surface
side.
As shown in FIG. 2, the vibrator 11 is fixed by covering the outer periphery with a substantially
cylindrical buffer material 12.
On the back surface side of the vibrator 11, a sheet 13 which closes the back surface side
opening 12a of the cushioning material 12, and a lead wire 15 are fixed.
03-05-2019
4
The buffer material 12 is made of, for example, a rubber material such as silicone rubber or a
soft resin material.
[0016]
A resin housing 14 is fitted around the buffer material 12 covering the vibrator 11.
The surface 11a of the vibrator 11 and the open end 14a of the housing 14 are disposed
substantially flush with each other as shown in FIG. The surface 11 a of the vibrator 11 may be
slightly protruded from the open end 14 a of the housing 14 or may be concavely arranged.
[0017]
In the ultrasonic sensor 10, the surface 12a of the buffer material 12 disposed between the
vibrator 11 and the housing 14 is at a position recessed from the surface 11a of the vibrator 11
and the open end 14a of the housing 14, An annular groove 10 a is formed around 11 to form a
space A.
[0018]
The depth and width of the annular groove 10a and the thickness of the buffer material 12 are
about 1 mm, for example, when the diameter of the vibrator 11 is 14 mm.
[0019]
The space A is formed on the surface 11 a side peripheral portion of the vibrator 11 by making
the vibrator 11 project from the opening end 14 a of the housing 14 in which the vibrator 11 is
flush with the surface 12 a of the buffer material 12. You can also.
In this case, since the vibrator 11 has the space A on the side surface of the surface 11a, there is
no member for suppressing the vibration of the vibrator 11 by the space A, and the vibration of
the vibrator 11 becomes smooth. It is possible to obtain a detectable range very close to the
characteristics of the vibrator 11 itself shown in FIG.
03-05-2019
5
[0020]
The back surface of the vibrator 11 is electrically connected to the substrate 16 through the lead
wire 15.
A filler B such as silicon is filled in a space B between the substrate 16 and the sheet 3 made of a
soft material having a buffer property such as urethane in which the lead wire 15 in the housing
14 is disposed. . The cushioning material 12, the sheet 13 and the lead wire 15 are further firmly
fixed by the filler C. The housing 14 is planted or fitted to the central portion and the left and
right portions of the front and rear bumpers of the vehicle.
[0021]
On the substrate 16, an electric component 17 such as an electronic element constituting a
control circuit of the ultrasonic sensor 10 and a harness 18 are disposed. A back cover 19 is
disposed on the back side of the housing 14 to close it. A space E between the substrate 16 and
the back cover 19 in the housing 14 is filled with a filler E such as silicon. The substrate 16, the
electrical component 17, the back cover 19, and the connection between the harness 18 and the
substrate 16 are further firmly fixed by the filler E. The lid member 19 may be integral with the
housing 14.
[0022]
FIG. 3 is a vibration characteristic diagram of a detection range of the ultrasonic sensor 10
having an annular groove 10 a formed by arranging the buffer material 12 at a recessed position
around the vibrator 11. As shown in FIG. 3, by forming the annular groove 10a, the suppression
of the vibration of the vibrator 11 can be reduced, and the vibration of the vibrator 11 can be
made smooth without resistance and a detectable distance. Can be extended to 110 cm in both
the lateral and vertical directions as compared with the prior art shown in FIGS.
[0023]
The ultrasonic wave transmitted from the vibrator 11 is received by an element in the vibrator
03-05-2019
6
11 after a part of the ultrasonic wave returned to hit the object comes into the annular groove 10
a adjacent to the front periphery of the vibrator 11. Therefore, the detectable distance can be
extended beyond the function of the vibrator 11 itself.
[0024]
Second Embodiment The second embodiment of the present invention will be described in detail
with reference to FIGS. 4 to 6.
In the second embodiment of the present invention, the annular groove 10a of the ultrasonic
sensor 10 according to the first embodiment described above is an annular groove 20a having a
shape as shown in FIG. Hereinafter, the same parts as those of the first embodiment described
above are denoted by the same reference numerals, and the description thereof will be omitted.
[0025]
In FIG. 4 to FIG. 6, reference numeral 20 denotes an ultrasonic sensor, in which a cylindrical
vibrator 21 for transmitting and receiving ultrasonic waves is disposed at the center on the
surface side. The vibrator 21 fixes and covers a substantially cylindrical buffer material 22 on the
outer periphery. The vibrator 21 fixes a sheet 13 made of a soft resin such as urethane and a
lead wire 15 on the back side. The sheet 13 closes the back surface side opening 22 b of the
cushioning material 22 and covers the back surface of the vibrator 21.
[0026]
A housing 24 is fitted around the buffer material 22 covering the vibrator 21. The surface 21a of
the vibrator 21 and the open end 24a of the housing 24 are disposed substantially flush with
each other as shown in FIG. In the ultrasonic sensor 20, the surface 22a of the shock absorbing
material 22 disposed between the vibrator 21 and the housing 24 is at a position recessed from
the surface 21a of the vibrator 21 and the open end 24a of the housing 24. An annular groove
20 a is formed around the circumference 21 to form a space F.
[0027]
03-05-2019
7
As shown in FIG. 4, the annular groove 20 a is formed by forming substantially arc-shaped
projecting portions 24 b and 24 c protruding from the left and right of the opening end 24 a of
the housing 24 toward the center P of the vibrator 21. It consists of arc-shaped grooves 20b and
20c which are formed in wide and symmetrical shapes at places and gaps 20d and 20e which are
formed in narrow arcs at two places on the left and right.
[0028]
6 shows an ultrasonic sensor 20 according to a second embodiment shown in FIGS. 4 and 5
having an annular groove 20a formed by disposing the shock absorbing material 22 at a
recessed position around the vibrator 21. It is a vibration characteristic view of a detection range.
In the present embodiment, the annular groove 20a is formed on the front side surface of the
vibrator 21, and the protrusions 24b and 24c are formed on the left and right of the annular
groove 20a.
[0029]
As a result, it is possible to reduce the suppression of the vibration of the vibrator 21 by the
buffer material 22, and the vibration of the vibrator 21 is made smooth without resistance, and
the conventional ultrasonic sensor shown in FIG. 12 and FIG. The directivity can be given to the
detection range by the protrusions 24b and 24c in comparison with the vibration characteristic
of the detection range of the second embodiment, and as shown in FIG. cm] can be extended.
[0030]
The ultrasonic sensor 20 changes directivity as appropriate by changing the shape and size of
the protrusions 24 b and 24 c as needed, and extends the detection distance to detect ultrasonic
waves in accordance with the use place to be installed Can be provided.
For example, with the ultrasonic sensor 20 installed in the rear bumper of the vehicle body, the
detection range in the vertical direction is narrowed, the distance for detecting an object is
increased without detecting the road surface, and the vehicle body is advanced quickly. The
presence of an object can be detected to prevent the vehicle body from colliding with the object.
03-05-2019
8
[0031]
Further, when the ultrasonic sensors 20 are installed in the bumpers at the front left and right
ends of the vehicle body, it becomes possible to detect an object in a wide range from the side of
the vehicle body to the front. Moreover, the ultrasonic sensor 20 detects the ultrasonic sensors
20 within the object detection range of all three ultrasonic sensors installed at, for example, the
center, the left, and the right of the bumper by changing the directivity. It is possible to eliminate
the unevenness of the space in which the object can not be detected without overlapping the
range of the object.
[0032]
Third Embodiment The third embodiment of the present invention will be described in detail with
reference to FIGS. 7 and 8 below. According to the third embodiment of the present invention, as
shown in FIGS. 7 and 8, the protrusions 27b and 24c formed on the housing 24 of the abovedescribed second embodiment are protrusions 27a. , 27b. Hereinafter, the same parts as those of
the second embodiment described above are denoted by the same reference numerals, and the
description thereof will be omitted.
[0033]
In FIG. 7 and FIG. 8, reference numeral 25 denotes an ultrasonic sensor, in which a cylindrical
transducer 26 for transmitting and receiving ultrasonic waves is disposed at the center on the
surface side. The vibrator 26 fixes and covers a substantially cylindrical buffer material 27 on the
outer periphery. The vibrator 26 fixes the sheet 13 made of soft resin such as urethane and the
lead wire 15 on the back side. The sheet 13 closes the back surface side opening 27 c of the
cushioning material 27 and covers the back surface of the vibrator 26.
[0034]
A housing 28 is fitted around the cushioning material 27 covering the vibrator 26. The surface
26a of the vibrator 26, the open end 28a of the housing 28, and the surface 27d of the
03-05-2019
9
projecting portions 27a and 27b are arranged substantially flush as shown in FIG. In the
ultrasonic sensor 25, the surface 27 d of the cushioning material 27 disposed between the
transducer 26 and the housing 28 is an annular groove 25 a located at a position recessed from
the surface 26 a of the transducer 26 and the open end 28 a of the housing 28. To form a space
G, and has projecting portions 27a and 27b which bisect the space G.
[0035]
The annular groove 25a is formed adjacent to the periphery of the vibrator 26, as shown in FIG.
The annular groove 25a is divided in half so as to fill the annular groove 25a with the
substantially arc-shaped projecting portions 27a and 27b which protrude from the bottom
surface of the annular groove 25a toward the left and right around the front surface side of the
vibrator 26. . The annular groove 25a is composed of arc-shaped grooves 25b and 25c which are
formed wide and symmetrical in upper and lower two places, and gaps 25d and 25e which are
formed in narrow circular arcs at two right and left places.
[0036]
The ultrasonic sensor 25 is configured such that the annular groove 25a is divided into two parts
by the annular groove 25a formed by disposing the buffer material 27 at a recessed position
around the vibrator 26, and the projecting portions 27a and 27b of the buffer material 27. In the
vibration characteristic diagram of the detection range, substantially the same data as the data of
the second embodiment described above is obtained.
[0037]
As a result, it is possible to reduce the suppression of the vibration of the vibrator 26 by the
cushioning material 27, and the vibration of the vibrator 26 is made smooth without resistance,
and the conventional ultrasonic sensor shown in FIG. 12 and FIG. In the same manner as in the
second embodiment, directivity can be given to the detection range by the projecting portions
27a and 27b as compared with the vibration characteristics in the detection range of the second
embodiment, and the same operation and effect as the second embodiment. There is.
[0038]
The present invention has the following effects since it has the above-described structure and
action.
03-05-2019
10
According to the first aspect of the present invention, there is provided a vibrator having a
substantially cylindrical shape, which receives and transmits ultrasonic waves, a shock absorbing
material covering a side surface of the vibrator, a housing disposed around the shock absorbing
material and containing the shock absorbing material. In the ultrasonic sensor, the ultrasonic
sensor has a space A formed around the front side of the vibrator, so that the vibrator can be
used even if a shock absorber or a housing is installed around the ultrasonic vibrator. A function
can be exhibited without reducing the detection capability range originally equipped.
The ultrasonic sensor according to claim 1 has a wider detectable range than the conventional
ultrasonic sensor in which the entire side surface portion of the vibrator is covered with the
buffer material, and the performance can be improved without increasing the number of parts.
[0039]
According to the invention of claim 2, in the invention according to claim 1, the space A is
formed by forming an annular groove formed between the open end of the front side housing
and the vibrator. Without increasing the number, the detection capability of the ultrasonic
detector can be expanded with a simple structure to improve the performance. In addition, since
the performance of the ultrasonic detector can be improved, it can be made smaller than other
ultrasonic detectors having equivalent functions, and the material cost of the housing can be
reduced. By reducing the size of the ultrasonic detector, the appearance of the installation
location such as a bumper can be improved, and the ultrasonic detector hole of the bumper in
which the ultrasonic detector is installed can be made smaller to improve the strength of the
bumper. it can.
[0040]
According to the invention of claim 3, in the invention according to claim 2, the surface of the
vibrator and the open end of the housing are disposed flush with each other, and the surface of
the cushioning material is the surface of the vibrator and the surface By disposing at a position
recessed from the open end of the housing, it is possible to reduce the material cost by reducing
the material of the buffer material for the space volume. Further, by arranging the surface of the
transducer and the open end of the housing flush with each other, it is possible to prevent the
ultrasonic detector installed on the surface of the bumper or the like from colliding with an
03-05-2019
11
object and damaging it.
[0041]
The invention according to claim 4 relates to the invention according to claim 2 or 3, wherein the
annular groove is an arc-shaped groove formed in the vibrator, a protrusion projecting from an
inner open end of the housing, and the vibrator The detection range of the ultrasonic detector
can be made to have directivity in the horizontal lateral direction and the vertical direction by
forming the gap with the outer wall of the above, and the detectable range and distance can be
improved. it can. In addition, the ultrasonic sensor can provide the vibrator with desired
directivity by changing the shape and size of the protrusion appropriately as necessary, and the
detection distance can be extended and installed. It can be an ultrasonic detector that matches
the location. In addition, the ultrasonic sensor can prevent the road surface from being
erroneously detected as an object by changing the directivity by reducing the detectable angle
range in the vertical direction in which the object can be detected. In addition, since the
projection is disposed on the front side of the shock absorbing material, the shock absorbing
material can be prevented from dropping off from the ultrasonic sensor.
[0042]
According to the invention of claim 5, in the invention according to claim 2 or 3, the annular
groove is an arc-shaped groove formed in the vertical direction of the vibrator, and a housing
from the surface of the cushioning material in the annular groove. The same effect as in the
fourth aspect described above is obtained by forming the gap formed by the projecting portions
projecting to the left and right portions of the inner open end of the inner wall and the outer wall
of the oscillator, and Since the front side can be inserted and assembled, the vibrator and the
shock absorbing material can be easily assembled to the housing.
[0043]
Brief description of the drawings
[0044]
1 is a front view of an ultrasonic sensor, showing a first embodiment of the present invention.
[0045]
2 is a cross-sectional view of the arrow line I-I direction of FIG.
03-05-2019
12
[0046]
3 is a graph showing the first embodiment of the present invention, is a circle graph showing the
obstacle detection range of the ultrasonic sensor.
[0047]
4 is a front view of an ultrasonic sensor, showing a second embodiment of the present invention.
[0048]
5 is a sectional view in the direction of the arrow line JJ of FIG.
[0049]
6 is a graph showing a second embodiment of the present invention, is a pie graph showing an
obstacle detection range of the ultrasonic sensor.
[0050]
7 is a front view of an ultrasonic sensor, showing a third embodiment of the present invention.
[0051]
8 is a cross-sectional view in the direction of the arrow line KK in FIG.
[0052]
9 is a front view of a conventional ultrasonic sensor.
[0053]
10 is a plan view of a conventional ultrasonic sensor.
[0054]
11 is a cross-sectional view in the direction of the arrow HH of FIG.
[0055]
03-05-2019
13
FIG. 12 is a circle graph showing an obstacle detectable range of the conventional ultrasonic
sensor having no cushioning material and housing.
[0056]
13 is a circle graph showing an obstacle detectable range of the conventional ultrasonic sensor.
[0057]
Explanation of sign
[0058]
10, 20, 25 Ultrasonic Sensor 10a, 20a, 25a Annular Groove 11, 21, 26 Vibrator 11a, 21a, 26a
Surface 12, 22, 27 Buffering Material 12a, 22a, 27d Surface 14, 24, 28 Housing 14a, 24a , 28a
Opening end 20b, 20c, 25b, 25c Arc-shaped groove 20d, 20e, 25d, 20e Gaps 24b, 24c, 27a, 27b
Protrusions A, F, G Space
03-05-2019
14
Документ
Категория
Без категории
Просмотров
0
Размер файла
24 Кб
Теги
jp2001337172
1/--страниц
Пожаловаться на содержимое документа