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JPS56162428

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DESCRIPTION JPS56162428
Specification 1, Name of the Invention Optical Device 1) Detecting a change in the amount of
light received when an object passes and detecting the passage of the object Two light receiving
elements arranged so as to have a common light receiving area for simultaneously receiving light
by both light receiving elements and a single light receiving area for receiving each light
receiving element on both sides of the common light receiving area, and 932 A signal processing
circuit including a movement direction determination circuit that determines the light reception
order of the light receiving elements and outputs a different signal depending on the movement
direction of the object, and a display unit driven by the output of the signal processing circuit.
Light bulbs. 2) As the movement direction discrimination circuit, determine the light reception
level of each light receiving element ° When two level judgment circuits and the differential
rating connected in series with this level judgment circuit do not output the other level judgment
circuit A first cancel circuit for erasing the output of the differential circuit; and a second cancel
circuit for erasing the output of the differential circuit when the output of the differential circuit
occurs simultaneously. An optical sorter according to claim 1.
2, the scope of claims
3. Detailed Description of the Invention The present invention relates to an optical source which
receives projected modulated light or infrared radiation emanating from an object and detects
the passage of the object. More particularly, it relates to a light "relay" which also identifies the
direction of passage of objects. In the prior art, light source devices as shown in the first
enclosure or (ii) are well known. That is, the light source device A shown in FIG. 1 (A)
incorporates both a light emitting element for emitting modulated light B and a light receiving
element for receiving reflected light that is reflected when the modulated light B passes through
an object or human body C. It is a schematic diagram which shows the use condition of the
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reflection type optical relay. Although this reflection type optical relay is easy to install and
adjust, it can not detect the moving direction of the object, and the amount of received light may
change even if there is no object passing due to the vibration of the object in the mounting
surface E or detection range. There is a risk of malfunction, and there is also a fear of
malfunction even when an insect comes into the detection range, and there is a point of lack of
reliability. In addition, the second direction is a schematic diagram showing a direction-detecting
type optical relay composed of two sets of opposing EndPage: 1 type optical relays. Two sets of
receiving relays consisting of a nose nose, a receiver F1 facing the unit F11, and a receiver G2
facing the projector Fs + i are juxtaposed, and the outputs of the receivers Cq and Gz are
amplified, detected, change detection, level judgment, etc. A circuit that stores the input order of
the light receiving elements via the signal processing circuit H1 ° H2 and an AND circuit etc. of
both light receiving circuits and is input to the movement direction detection circuit J, and an
alarm circuit or an alarm circuit is output by the output of this movement direction detection
circuit. Although the light source device operates the display circuit K, there is a disadvantage
that the setting of the light receiving range of the two sets of light source devices arranged side
by side must be properly performed and the setting range is five or five. That is, although the
light projection range to the (two light projectors F □) can be set as shown in FIG. 2 (4 to 4),
depending on the device of the light receiver G1eGif and the contents of the process call to 4 In
some cases, it can not be detected. The present invention aims to ameliorate the abovementioned drawbacks, and it is an optical device that detects the passage of an object by
detecting a change in the amount of light received when the object passes, and is an object larger
than the human body. For passing, both of the common light receiving area where both light
receiving elements simultaneously receive light and this common light receiving area (two light
receiving elements arranged so as to have a single light receiving area where each light receiving
element receives light) And a signal processing circuit including a moving direction
determination circuit that determines the light reception order of the two light receiving
elements and outputs a different signal depending on the moving direction of the object, and a
display driven by the output of the signal processing circuit And an optical device equipped with
means.
Hereinafter, the present invention will be described in detail according to an embodiment of the
present invention. In the figure, ■ indicates a detection body, ■ indicates a joint, and ■
indicates a mounting base. The detection body 1 is a cylindrical case 1 and is provided with a
female screw 11 inside the opening 2. The opening 2 of the case 1 is covered with a front cover
8. The front cover 8 is formed of a transparent resin, and is coupled to a peripheral frame 4 for
coupling to the case 1. In the surrounding frame 4 you throw the you part 4a. Numerals 6 are
projections, and support frames 7, 7 supporting printed boards 6, 6 are connected by tapping
screws 8, 8. A light emitting element 9 is soldered to a printed board, and the light converted
from the light emitting element 9 by the half object surface reflecting mirror 10 is parallelbeamed and externally projected. 1] is a light receiving element, and its acceptance is 7-d. As
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shown in FIG. 5, there are two light receiving elements and hoods, and as shown in FIG. The
cylindrical convex portion 14 * 14 center ff [s4CXk '-storage g16 of the car 15 and @ 17 for
printed board fitting are provided. Reference numeral 18 denotes a wire mesh covering the front
of the speaker 15 (7). The reference numeral 19 denotes a volume, and a switch is a switch f,
21i1) a lance, and η an electronic component. Reference numeral 2 denotes a joint, 90% of
which is a one-end-shaped part award, and a foot fixed 24 to the case 1 with a screw i9, and the
interval l can be adjusted by tightening a screw. n is one piece 28 and one end is connected to
the metal attachment body of the mounting metal, and the other end is a spherical part provided
with a foot fixed way with a fixed foot, a notch hole aiming at the lower square part of the vessel,
around 31 The part is in contact with the spherical surface of the spherical part chrysanthemum.
An L-shaped hooking blade clear 32 is provided for the lid replacement, and the hooking blade &
32 and an electric wire & 1 blade are connected to the printed board 6 in the detection main
body I. The key is the base that makes up the mounting metal, @ @ hook hook blade (, the blade
receiving spring that is hooked and connected with 32, the terminal plate 3B integrally provided
with 35, '+ 6 is fixed, It has a through hole on the mounting screw. FIG. 7 (a) shows a block
diagram, and FIG. 7 (b) shows a light projecting circuit for driving the light emitting element 9.
The light emitting circuit 9 is composed of oscillation circuit theory and driving circuits 39b). The
light emitting circuit I is not always necessary, and it is not necessary when the light receiving
element 11.11 'is to sense infrared rays emitted from itself such as a human body or a car. 40.40
is a circuit for processing a signal received by the light receiving elements u and u ', and a tuning
amplifier circuit 4D & a detection circuit .omega.b, low-pass frequency which is synchronized
with the period of light projected from the light emitting element It can be composed of kfi-40e,
low pass amplifier section, and wave shaping circuit.
d 'is a moving direction detection circuit that controls the light reception sequence of the light
receiving elements u and u', and comprises, for example, a differential phase detection circuit, an
in-phase detection circuit 41b and a monostable multi 41 @ 7 Detect order. The symbol 稔 is a
display means, and when moved from the father's direction, the signal for α is outputted from
the movement direction discrimination circuit, and when the signal is moved from the Y
direction, the signal β is outputted. Input from the speaker through the amplifier 42b. EndPage:
For example, "Welcome, Welcome, N, Set" for the message from the 2X direction, and (for "Thank
you," for the movement from the Y direction. Further, Y is a range of light emitted from the light
emitting element, δ, a ′ is a light receiving area of the light receiving element P11, u ′. The
gap λ between the light receiving ranges δ and 1t is set to be slightly smaller than the width of
the human body and to be equal to the size. For example, when a person comes to this portion
with a width of about 301 to 101 (shown in FIG. 7), the light receiving element u, so that the
common light receiving range K is received simultaneously at both light receiving elements 11
and 11 ' u 'is arranged. At both sides of the common light receiving area, there are single light
receiving areas M and M 'in which the respective light receiving elements 11.11' receive light
independently. As shown in FIG. 7, the differential phase detection circuit 411 is a wave shaping
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circuit. A differential circuit 41 az comprising a series circuit of a capacitor C1 resistor R
connected in series with a comparator C (M1, C0 M2 and 6 comparators to be compared with the
output r of the U ′, r ′ and the reference voltage V 41m- and this differentiating circuit 411i,
41a'l are connected at their anodes, and the cathode is connected to the output terminal of the
other comparator C (IEj, COMz. The in-phase detection circuit 41b is formed of, for example, a
NAND gate 41b to which the differentiating circuits 41ai and 41 / i are input. A second cancel
circuit 41f is configured by the in-phase detection circuit 41b and 82 gates 41c and 41e '. Then,
as shown in FIG. 8, attach the base part of the mount l to the side wall weakly inside the inlet
wing using a mounting screw and connect the power supply line to the terminal plate part and
the hook. Then, the hooking blade edge of the lid ρ of the mounting table 2; 32; Connect the 16
with the blade receiving spring a integrally formed with the ink to electrically and mechanically
connect the notification main body and the mounting base. Next, the front cover 8 of the
detection body I is moved and adjusted so as to face the entrance morning direction.
Since the light emitting element 9 and the light receiving elements u and u 'are incorporated in
the detection main body 1 in an adjusted state, it is only necessary to face in the detection
direction. That is, the modulated light (19 (a)) projected from the light emitting element 9 is
reflected by the human body moving in the Y direction, and the reflected light is received in the
order of the light receiving element U and the light receiving element U '. The signals are
amplified in the order shown at the left end of lpi, and the waveform-shaped output as shown in
(9) and (9) of FIG. 9 is input to the differential phase detection circuit. In this differential phase
detection circuit, as shown in FIG. 9 (h, 4 (when generating a pulse when the light reception
signal on the side of light reception later rises). That is, in FIG. 7 (b), when the object intrudes
into the single light receiving range storage of the light receiving element U, only the comparator
CoMt has the point y at a high level. However, since the point y 'is also low level, the differential
pulse formed by the differentiation circuit 41a1 is pulled low level by the diode Da and the
output U is not, but when the human body or an object moves further and enters the common
light receiving range K The differential output is also output from the differential circuit 41a-. At
this time, since the output of the comparator COMI is output, the voltage at point y is high level,
and the output of the comparator & z 'is input to the diode D 41e'. Since the pulse width is
extended and output by the monostable multi 41d, the voltage at the point β becomes high level
for a fixed time. Next, when an object smaller than the width of the human body passes like an
insect, the light receiving area of both light receiving elements n and u in FIG. Width dimension
of δ '! Since the width of insects is smaller than that of insects, both light receiving elements ○
and '11' force (simultaneously receives light and there is no common light receiving area, insects
have both light receiving elements 11.11 ' Of both lights: Even when crossing the stone gates a
and δ ', the outputs of the comparators C0M1 and C0M2 do not simultaneously become 1), so
the output of the differentiation circuit is canceled by the first cancellation circuit of the
differentiation circuit and the next stage is input I will not. Next, when the mounting surface of
the optical device or both light receiving elements Q] the light receiving element a vibrates, both
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light receiving elements 11. Since the amount of light received by U 'changes simultaneously, the
comparator COMI. An output is simultaneously output from CO'M2, and a pulse is
simultaneously output from differential circuits @ 41az and 41a1 ', but it comprises an in-phase
detection circuit consisting of a NAND gate and a gate company c and 41c consisting of a gate of
V. (Cancelled by the second cancel circuit, not input to the circuit of the next stage).
As described above, the output direction α and β are output from the moving direction
detection loop 41 + c to determine the light reception order, and the sound such as “I'm
welcome” and “thank you” is emitted from the display means Ru. EndPage: If the 3 voices are
opposite to the direction of movement of the object, the installation location may not be
converted to M '5 by reversing with the change-over switch. Also, by screwing or unscrewing the
screw connection between the external thread 4B provided on the peripheral frame 4 coupled to
the periphery ^ of the front cover 8 and the inner periphery of the open end 2 of the case 1 The
correct display can also be made by rotating the mounting metal as it is while maintaining the
relative positions of the light emitting element 9 and the light receiving elements 11 and 11 '.
According to the present invention, according to the present invention, in a photoelectric device
that detects a change in light receiving information when an object passes through and detects
the passage of an object, both light receiving elements simultaneously receive light with respect
to the passage of an object larger than a human body Of the two light receiving elements and the
light receiving elements of the two light receiving elements arranged so as to have a common
light receiving area and a single light receiving area which each light receiving element receives
on both sides of the common light receiving area A signal processing circuit including a
movement direction determination circuit that determines 4g different according to the
movement direction of the object, and the display means driven by the output of the signal
processing circuit is configured as a photoelectronic device. Just attach the pedestal to the
construction surface, connect the power supply line, and turn the front cover 8 of the detection
unit I in the specified direction to determine the direction of movement of the human body or
object, and display the lamp or "Welcome" as needed. "Thank you There has been "able to occupy
issued a voice, such as conventional, such as two sets of light '# take the electronics Deke, or a
light-receiving order to adjust the light-receiving range of both light relay? It is extremely
convenient and effective because it is easy to set up work without setting up (it becomes easy for
even an layman to install). Also when using as a simple object detection other than detecting the
direction of movement of a human body or an object, if there is an input simultaneously to both
light receiving elements, the second cancellation circuit is detected by the common mode
extraction circuit Since it cancels the output signal at 41f, it is strong against vibration (or, even if
insects fly in, the light receiving range first of both light receiving elements, interval p, is slightly
smaller than the width of the human body) Therefore, even if insects come in, there is no
common light receiving range K, and even if there is a light receiving input of each light receiving
element by the first cancellation circuit, it will be canceled and malfunction will not occur. Be
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In addition, since the light receiving element n, 11 'and the light emitting element 9 are rotated at
a fixed position while keeping the relationship 1111 constant, mounting is possible even when
the mounting location is limited, and further, There is no need to re-install even if the direction of
detection by the human body or object and the display means do not combine after installation,
there is no need to consider the moving direction of the mounting end and installation is easy.
And even amateurs are possible. Furthermore, for example, the detection main body is not
switched by switching the output signal by switching switches added at the subsequent stage of
the movement direction detection circuit d, and the traveling direction of the human body or
object and the display means only by switching the switch Mounting is very convenient from the
aspect of maintenance, except that the contents of the display are combined. In the embodiment
of the present application, the case where the light emitting element is built in the detector main
body is displayed, but the light emitting element is unnecessary when the detecting element for
detecting infrared rays emitted from the human body is used as the light receiving element.
4. Brief description of the drawings. FIGS. 1 and 2 are views showing a conventional example of
the present invention, and FIG. 1 ((a) is a schematic view showing a use state of a reflection type
optical relay, FIG. B) is a schematic diagram in the case of detecting the moving direction of the
object using the facing type optical device 2gi; 2i; It is a schematic diagram which shows the light
projection range of an optical relay.
2, the scope of claims
8 to 7 are detailed explanatory drawings of the present invention, FIG. 3 is a perspective view,
FIG. 4 is a sectional view, FIG. 5 is a partial perspective view, and FIG. Fig. 7 (a) is a block
diagram, Fig. 7 (b) is a partial circuit diagram, Fig. 8 is a schematic view showing an attached
state, and Fig. 9 is shown in Fig. 7 It is the figure which showed the signal waveform in P to U,
(alpha), (beta) point. · · · · Detection body · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · light
emitting element · · · · · · · · · · · · · · · · · · · · · · 7 · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · The second
cancellation circuit J, J '· · · · · shows the light receiving range of the light receiving element u, u',
K · · · common light receiving range, M1 M '· · · single light receiving I11 surrounding. EndPage: 4
Fig. 1 (b) 11! 2 (a) (b) (a) c) 2) FIG. 3 FIG. 4 FIG. 5 EndPage: 5
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