JP3074782B2 - Human body detector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body sensor, and more particularly, to a human body sensor for lighting control.

[0002]

2. Description of the Related Art Lighting equipment is an example of equipment provided with a human body detector. In this lighting device, the human body detector performs the following operation. In other words, at night, the lighting equipment is turned on when a person approaches the lighting equipment and enters the sensing range of the human body sensor, and turns off the lighting equipment when the person moves away from the lighting equipment and goes out of the sensing range of the human body sensor. Do.

[0003] The sensing range of the human body sensor is limited. Also, if the sensing range of the human body sensor is too large, it will sense that even people who do not need lighting of the lighting equipment will light the lighting equipment, which wastes power, so the human body sensor adjusts the sensing range appropriately. Used as

When a person is located at the boundary of the sensing range, the switching circuit of the human body sensor causes chattering (meaning on / off in a short time), which adversely affects the lighting equipment. It also makes people uncomfortable. Further, if the lighting equipment is turned off immediately because a person goes out of the sensing range, the feet suddenly become dark and there is a danger. From the above, the human body sensor for lighting equipment turns on the switching circuit almost at the same time as the person enters the sensing range. However, when the person goes out of the sensing range, the human body sensor for a while (a delay time of about 3 minutes). A) a delay circuit that turns off the switching circuit after a certain time;

[0005]

However, if the operation check test of a human body sensor having such a delay circuit and a lighting fixture incorporating this human body detector is performed in the manufacturing process or at the installation site, the delay time becomes a problem. And a large amount of time is spent on operation check tests.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to reduce the time loss when performing operation confirmation in a test and to efficiently test the operation. To provide a human body sensor that can be implemented.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a sensor unit for outputting an H signal when a human body within a sensing range is sensed, and an H signal output from the sensor unit.
A delay circuit that outputs an H signal when the signal is a signal and outputs an L signal with a predetermined delay time when the output of the sensor unit changes from the H signal to the L signal, and turns on the external output when the output of the delay circuit is the H signal And a switching circuit that performs a predetermined time period H signal immediately after turning on the power supply of the human body sensor,
A delay time reducing means for reducing the predetermined delay time when the output of the timed timer circuit is an H signal is provided in the delay circuit.

[0008]

With the above arrangement, the time-period timer circuit outputs the H signal from immediately after the power of the human body detector is turned on until the predetermined time-period elapses. The predetermined delay time is reduced. After a predetermined time period has elapsed since the power of the human body sensor was turned on, the timed timer circuit outputs an L signal. Therefore, the shortened predetermined delay time of the delay circuit provided with the delay time reducing means is equal to the original predetermined delay time. It returns to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the human body sensor according to the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing a human body sensor. 2A and 2B are timing charts for explaining the operation of the human body sensor. FIG. 2A shows the timing of turning on the commercial power supply of the human body sensor, FIG. 2B shows the output timing of the timed timer circuit, and FIG. Indicates the output timing of the
(D) shows the output timing of the switching circuit. FIG. 3 is a main part circuit diagram showing delay time reducing means of the human body sensor.

As shown in FIG. 1, a human body detector 10 outputs a H signal when sensing a human body within a sensing range A, and outputs an H signal when the sensor unit 11 outputs an H signal. A delay circuit 12 that outputs a signal and outputs an L signal with a predetermined delay time when the output of the sensor unit 11 changes from an H signal to an L signal, and corresponds to an external output when the output of the delay circuit 12 is an H signal and a switching circuit 13 to turn on the external output terminals 10 _a, 10 a.

The human body detector 10 is connected to the commercial power supply terminal 1.
When a commercial voltage (AC 100 V) is applied to 0 _{b and} 10 _b , the commercial voltage (AC 100 V) is converted into a predetermined DC voltage, and a power supply circuit that supplies a DC voltage to each circuit constituting the human body sensor 10 14, and a timing timer circuit 15 which outputs between H signal of a predetermined time period time T ₂ when detecting the rising of the voltage supplied from the power supply circuit 14. Then, the delay circuit 12 outputs H
When a signal is input, a predetermined delay time T of the delay circuit 12
Delay time reducing means 12 for reducing _L to a predetermined delay time T _{S
Has a} .

[0013] Incidentally, the sensor unit 11 compares a pyroelectric 11 _a to sense a heat ray from a human body, an amplifier 11 _b for amplifying the output of the pyroelectric element 11 _a, the output from the amplifier 11 _b a reference voltage and a comparison circuit 11 _c outputs an H signal when the reference voltage or more and.

Next, the connection relationship will be described. Pyroelectric element 11
The output of _a is connected to the amplifier 11 _b, the output of the amplifier 11 _b is connected to the comparison circuit 11 _c, the comparator circuit 11 _c is connected to the delay circuit 12. The output of the delay circuit 12 is connected to a switching circuit 13, and the output of the switching circuit 13 is connected to external output terminals _{10a and 10a} . Furthermore,
Output timed timer circuit 15 is connected to the delay time shortening means 12 _a delay circuit 12. Further, the input of the power supply circuit 14 is connected to the commercial power supply terminals _{10b, 10b} , and the power supply circuit 1
The output of 4 is connected to each circuit constituting the human body sensor 10.

Accordingly, the human body detector 10 operates as follows. Commercial power supply terminal 10 _b, 10 _b to a commercial voltage (AC10
0V), the power supply circuit 14 turns on the human body detector 10
Is supplied with a DC voltage. Then, with each circuit constituting the human body detector 10 starts to operate in unison, timed timer circuit 15 during the predetermined time period time T ₂ H
The signal is output to the delay time reducing means _12a . Accordingly, a predetermined delay time T _L of the delay circuit 12 is shortened to a predetermined delay time T _S.

During the predetermined time period T ₂ , FIG.
When the sensor unit 11 detects or cannot detect the human body and outputs the L signal and the H signal alternately as described above, the output of the sensor unit 11, the output of the delay circuit 12, and the output of the switching circuit 13 The relationship is as follows. That is, the delay circuit 12 outputs the H signal when the sensor unit 11 is outputting the H signal, and outputs the L signal with a delay of the predetermined delay time T _S when the output of the sensor unit 11 changes from the H signal to the L signal.
Output a signal. The switching circuit 13 is turned on in synchronization with the output of the delay circuit 12 when the output of the delay circuit 12 is an H signal, and is turned off when the output of the delay circuit 12 is an L signal.

Further, the predetermined time period time T ₂ has elapsed, timed timer circuit 15 the delay time shortening means L signal 12 _a
Output to Therefore, the predetermined delay time of the delay circuit 12 is T
_L.

Then, after the predetermined time period T ₂ has elapsed, as shown in FIG. 2C, the sensor unit 11 detects or cannot detect the human body and outputs the L signal and the H signal alternately. Output of the sensor unit 11 and the delay circuit 1
2 and the output of the switching circuit 13 are as follows. That is, the delay circuit 12 is
Outputs an H signal when it outputs an H signal, and outputs an L signal with a delay of a predetermined delay time _TL when the output of the sensor unit 11 changes from an H signal to an L signal. The switching circuit 13 synchronizes with the output of the delay circuit 12 and
2 is turned on when the output of the delay circuit 12 is an H signal and turned off when the output of the delay circuit 12 is an L signal.

The input / output relationship of the delay circuit 12 is retriggerable, and the predetermined delay time T _L
Is shortened to the predetermined delay time T _S , the input of the delay circuit 12 is set to L for only _{Ta 2} time shorter than the predetermined delay time T _S.
When it becomes a signal, the output of the delay circuit 12 becomes only the H signal. Similarly, when the predetermined delay time of the delay circuit 12 is T _L , when the input of the delay circuit 12 becomes the L signal only for the time T _b2 shorter than the predetermined delay time T _L , the output of the delay circuit 12 becomes only the H signal. Becomes Therefore, the timing relationship is as shown in FIG.

Therefore, when adjusting and confirming the sensing range A of the human body at the installation site of the human body sensor 10, the sensing range A is adjusted and confirmed by actually entering and leaving the sensing range A aimed by the worker. If the operation is performed while the predetermined delay time is shortened to T _S , if the user enters and exits at intervals longer than the predetermined delay time T _S , even if the user frequently enters and exits the sensing range A, the human body detection state of the sensor unit 11 at that time will not change. since appears as an external output terminal 10 _a, 10 _a of the on-off, time loss due to the delay time can be less efficient adjustment confirmation. The same can be said for the operation check test in the manufacturing process.

FIG. 3 shows the delay time reducing means 12._aThe main part showing
It is a circuit diagram. In FIG. _bIs a monostable multibar
It is an ibrator circuit. And the monostable multivibration
Data circuit 12_bTerminal T_1,T_TwoIn between, monostable multibar
Ibrator circuit 12_bAt the time of CR to determine the output pulse width of
The capacitor C, which is a component of the constant, is connected, and the terminal T ₁
Is grounded and terminal T_TwoIs the resistance R_TwoAnd resistance R₁Series times
Power supply V through road_ccIt is connected to the. In addition, terminal T_Two
Is connected to the emitter of the transistor Tr, and the resistor R_TwoWhen
Resistance R₁Is connected to the collector of transistor Tr.
Have been.

Therefore, when the H signal is input to the base of the transistor Tr, the transistor Tr turns on and the CR time constant decreases, and when the L signal is input to the base of the transistor Tr, the transistor Tr turns off and the CR time decreases. The constant increases. Therefore, the output pulse width of the monostable multivibrator circuit 12 _b is changed. That is, the predetermined delay time _TL is shortened to become the predetermined delay time T _S , or becomes the predetermined delay time _TL again.

Also, as shown in FIG.
The other one is connected to the external output terminals 10 _a, 10 one to the illumination lamp LA for _a, and connect the other of the external output terminals 10 _a, 10 _a on one of the commercial power supply, the other illumination lamp LA of the commercial power supply When connected to a lighting device, the lighting device can be provided with a human body sensor. In this case, the illumination lamp LA is turned on and off in synchronization with the on / off of the switching circuit 13.

[0024]

Since the human body detector of the present invention is constructed as described above, the operation confirmation test of the human body detector and the lighting equipment equipped with the human body detector is carried out in the manufacturing process or at the installation site. If the operation confirmation test is performed within a predetermined time period of the timed timer circuit immediately after power-on, the delay time is reduced, so that the operation confirmation test can be efficiently performed without receiving much trouble due to the delay time. Even after the lapse of time, there is an effect that a human body sensor with a reduced delay time can be provided by turning off and on the power again.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an embodiment of a human body sensor according to the present invention.

FIG. 2 is a timing chart for explaining the operation of the embodiment of the human body sensor according to the present invention;

FIG. 3 is a main part circuit diagram showing delay time reducing means of one embodiment of the human body sensor of the present invention.

[Explanation of symbols]

10 human detector 10 _a external output 11 sensor unit 12 delay circuit 12 _a delay time shortening means 13 the switching circuit 15 units of instruction timer circuit A sensing range T _L predetermined delay time T ₂ predetermined time period after a predetermined delay time T _S shortened before shortening time

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H05B 37/02 G01V 8/12 G01S 3/78

Claims (1)

(57) [Claims] 1. A sensor unit for outputting an H signal when a human body within a sensing range is sensed, and an output of the sensor unit is H
A delay circuit that outputs an H signal when the signal is a signal and outputs an L signal with a predetermined delay time when the output of the sensor unit changes from the H signal to the L signal, and turns on the external output when the output of the delay circuit is the H signal And a switching circuit that performs a predetermined time period H signal immediately after turning on the power supply of the human body sensor,
A human body sensor, wherein a delay time reducing means for reducing the predetermined delay time when the output of the timed timer circuit is an H signal is provided in the delay circuit.