JPS63204188A - Far infrared sensor and far infrared invader detector using the same - Google Patents

Abstract

PURPOSE:To achieve an accurate detection, by arranging a light emitting element on a case-like body so that light thereof is allowed to be received by a photo detector without passing through a far infrared incident window. CONSTITUTION:A window is provided on the side wall of a cap-shaped body 3 of a case-like body 1, a lens 12 of a light emitting element 10 is made to face the window from outside the case 1 with a terminal piece 11 laterally extended outside the case 1. When an invader approaches a far infrared sensor a and far infrared rays SO are incident into a photo detector 6 from the invader, a detection output from a far infrared detection circuit 7 is outputted outside through a specified terminal piece of a plurality of terminal pieces 9. The element 10 is so arranged that light therefrom is allowed to be received by the element 6 without passing through a far infrared ray incident window 5 and hence, when the element 10 is driven as desired, the light is allowed to be incident on the element 6 as pseudo far infrared ray corresponding to the far infrared rays SO which is radiated from an invader and incident as the invader approaches the device A. The pseudo detection output is outputted to a specified terminal piece 9. No pseudo output is obtained unless the device A operates normally. This enables accurate detection.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an improvement in a far-infrared sensing device and a far-infrared intruder detection device using the same.

2. Description of the Related Art Conventionally, a far-infrared sensing device having the configuration described below with reference to FIG. 7 has been proposed.

That is, it consists of a base body 2 and a cap-shaped body 3 corresponding to the base body 2, and a far-infrared rays are incident on the upper plate portion 4 of the cap-shaped body 3 using a far-infrared passing filter that mainly passes wavelengths in the far-infrared region or higher. Turn to the right of the case-like body with window 5 installed.

Therefore, within the case-like body 1, there is a photodetecting element 6 configured using, for example, a pyroelectric material plate and an electrode therefor.
A far-infrared detection circuit 7 connected thereto and configured using active elements such as field effect transistors is assembled and arranged on a wiring board 8. In this case, the photodetecting element 6 can detect not only visible light but also far infrared light.
It has characteristics that allow it to be detected effectively.

Further, the wiring board 8 is supported by the case-like body 1 by a plurality of terminal pieces 9 that penetrate through the base body 2 of the case-like body 1, and is also connected to the power supply connection end and the output end of the far-infrared detection circuit 7. etc. are led out of the case-like body 1 via a plurality of terminal pieces 9.

The above is the configuration of a conventionally proposed far-infrared sensing device.

According to the far infrared sensing device A having such a configuration,
An intruder approaches the far-infrared sensing device A with a predetermined terminal piece among the plurality of terminal pieces 9 leading out the power connection end of the far-infrared detection circuit 7 connected to an external power source in advance. If J-, the far infrared rays SO radiated from the intruder hits the photodetector element 6 inside the case-like body 1, and the case-like body =
The far infrared rays enter through the far infrared entrance window 5 of 4-1, and according to this,
Far-infrared detection output S A h< from the far-infrared detection circuit 7
It is outputted to the outside via a predetermined terminal piece among the plurality of terminal pieces 9.

In this case, if the far infrared ray SO is now incident on the photodetecting element 6 in the section indicated by a rectangular wave at No. 9N, the far infrared ray detection output SΔ is as shown in FIG. 9B. The differential wave is obtained by a pair of positive and angular pulses. In addition, if an intruder approaches the far-infrared sensing device A,
(There is no radiation of far-infrared rays So from an intruder, and the far-infrared entrance window 5 effectively blocks light other than far-infrared rays SO from entering the light detection element 6 from the outside.) The far-infrared detection output SΔ is not output from the infrared detection circuit 7.

Therefore, the far-infrared sensing device A shown in FIG. 7 can be used to detect that an intruder has entered a position where the intruder should be detected.

Furthermore, a far-infrared intruder detection device using the far-infrared detection device A described above in FIG. 7, which will be described below with reference to FIG. 8, has been proposed.

That is, the far-infrared sensing device A described above in FIG.
Ru.

Also, the level detection circuit B that detects the level of the total infrared detection output SΔ (from the far infrared sensing device Δ) is turned off.

This level detection circuit B is configured such that the far-infrared detection output SA is obtained from the far-infrared sensing device 1 as the positive and negative pair of pulses described above in FIG. 9B, and If the pulse exceeds the two threshold and negative reference setting levels, then the same polarity pair corresponds to the positive and zero pair of pulses, for example as shown in Figure 9C. The pulse is output as a level detection output SB.

It also has a processing circuit C. This processing circuit C detects whether or not far infrared rays SO from an intruder is incident on the light detection element 6 of the far infrared sensing device based on the level detection output SB from the level detection circuit B. It has a person detection means (not shown). In this intruder detection means, the level detection output SR from the level detection circuit B is 4 as shown in FIG. 9C.
When 1q is generated by a pair of pulses as shown in FIG. 9, for example, a rectangular wave as shown in Figure 9 is output as the intruder detection output SC1.

Furthermore, based on the intruder detection output SC1 from the intruder detection means of the processing circuit C, an alarm signal is generated when the far infrared rays SO from the intruder is incident on the light detection element 6 of the far infrared sensing device A. It has an alarm signal output circuit that outputs the SD to a position that controls the far-infrared intruder detection device. When the intruder detection output SC1 from the intruder detection means of the processing circuit C is obtained in the form of a rectangular wave as shown in FIG. 9, this alarm signal output circuit is configured as shown in FIG. The rectangular wave corresponding to the intruder detection output SC1 is
In this intruder detection output circuit, the intruder detection output SC1 from the intruder detection means of the processing circuit C is outputted as an alarm signal SD. In the case of a wave, the solenoid is configured with a relay circuit, and when a rectangular wave as the intruder detection output SC1 is supplied to the solenoid, the contact is turned on or off in the line section of the rectangular wave, The contact is turned on or A),
It is output to the external line F as a rectangular wave as the alarm signal SD.

Furthermore, based on the intruder detection output SC1 from the intruder detection means of the processing circuit C, if far infrared rays SO from an intruder is incident on the light detection element 6 of the far infrared sensing device Δ, it is displayed. has an intruder detection and display circuit.In practice,
When the intruder detection output SC1 from the intruder detection means of the processing circuit C is obtained in the form of a rectangular wave as shown in FIG.
Then, the indicator light is driven and displayed in the line section of the rectangular wave of the intruder detection output SC1, as shown by the rectangular wave in FIG. 9F.

The above is the configuration of a conventionally proposed far-infrared intruder detection device using the far-infrared sensing device A described above in FIG. 7.

According to the far-infrared infrared intruder detection device having such a configuration, the far-infrared detection device A is used to detect the intrusion of an intruder in advance.
In addition, other level detection circuits B1, processing circuits C, alarm signal output circuits, and intruder detection display circuits are placed in other positions; The far infrared detection circuit 7 includes a level detection circuit B, a processing circuit C,
If the required power is supplied from the position where the alarm signal output circuit and the intruder detection display circuit F are arranged, the following operation can be obtained.

In other words, if an intruder approaches the far-infrared sensing device △,
From the far infrared sensing device Δ, the far infrared detection output SA as described above in FIG. 9B is obtained, and based on this, the level detection output SA as described above in FIG. 9C, for example, is obtained from the level detection circuit B. A detection output 813 is outputted. Based on the level detection output SB obtained from the level detection circuit B, the intruder detection means of the processing circuit C also outputs, for example, the ninth
The intruder detection output SC1 as described above in the diagram is obtained,
Based on this, from the alarm signal output circuit, for example, the 9th
The above-mentioned alarm signal Sr) is outputted to the outside of -C1 via, for example, a line.Furthermore, based on the intruder detection output SCI, the intruder is detected. The display circuit displays that an intruder has entered the location where the far-infrared sensing device A is located.7 In addition, if the intruder does not come close to the far-infrared sensing device △, the far-infrared sensing device A Therefore, for the reason mentioned above, the far-infrared detection output S△ as mentioned above is reduced by 1q. Therefore, from the level detection circuit B, processing circuit C, and 2-signal output circuit, respectively, the above-mentioned l, =1 Novel detection output SB, intruder detection output SC1 and alarm signal SD are 1!?
The intruder detection display circuit does not display that an intruder has entered the position where the full infrared sensing device Δ is located.

Therefore, the conventional far-infrared intruder detection device shown in FIG. 8 has limited functionality as an intruder detection device.

In the case of a sensing device, b) Infrared rays (1i) Based on the far-infrared IA line detection output Δ obtained from the sensing device A, the node red 91M
! If the detection output SA is normal and 15, the far infrared sensing device A
is detected to be in a normal 14-operable state, t~,
Well, if the far infrared detection output SΔ is abnormal, then 3.
*It is possible to detect that the infrared ray sensing device △ is not in a state where it can operate normally.
It is necessary to set the same state as when the intruder is actually close to -4.

Figure 7 (J 4 + Conventional far infrared sensing device Δ
In this case, the disadvantage was that it was impossible for the financial department to detect whether or not it was operating normally.

In addition, in the case of the conventional far-infrared intruder detection device shown in FIG.
If the alarm signal SD is normal, it can be detected that the far-infrared intruder detection device is in a state where it can operate normally, and if the alarm signal SD is abnormal, it can be detected that the far-infrared intruder detection device has detected a far-infrared intruder. It is possible to detect when the intruder detection device is not operating normally, but in order to avoid this, it is necessary to monitor the far-infrared intruder detection device from the position where it is being managed. It is necessary to go to the location and set the far-infrared sensing device A to the same state as when the intruder actually approaches.

Therefore, in the case of the conventional far-infrared intruder detection device shown in FIG. It had the following drawback.

SUMMARY OF THE INVENTION The present invention provides a novel far-infrared sensing device that can be used to construct a far-infrared intruder detection device that does not have the above-mentioned drawbacks, and a novel far-infrared sensing device that uses the far-infrared sensing device. - It is an object of the present invention to propose a novel far-infrared intruder detection device that does not have the above-mentioned drawbacks.

The far-infrared sensing device according to the present invention, as in the case of the conventional far-infrared sensing device described above in FIG. Right configuration.

However, the far-infrared sensing device according to the present invention has such a configuration, in which a light-emitting element is provided in the case-like body of the far-infrared sensing device so that the light-emitting element can receive light from the light-emitting element. The structure is as follows. 1. The far-infrared intruder detection device according to the present invention has the following configuration, similar to the conventional far-infrared intruder detection device described above in FIG.

That is, a far-infrared sensing device containing at least a photodetecting element is provided in a case-like body on the right side of the far-infrared ray entrance window.

It also includes a level detection circuit that detects the level of far-infrared detection output from the far-infrared sensing device.

Furthermore, the level detection output from the level detection circuit is returned to the level detection output, and a processing circuit is added to the intruder detection means that detects whether or not far infrared rays from an intruder have entered the light detection element of the far infrared sensing device. do.

Also, based on the intruder detection output from the intruder detection means of the processing circuit, an alarm signal output that outputs an alarm signal when far infrared rays from an intruder are incident on the light detection element of the far infrared sensing device Has a circuit.

However, the far infrared infrared intruder detection device according to the present invention has the following configuration:
It has the following configuration.

In other words, the far-infrared sensing device has a configuration in which a light emitting element is installed in its case-like body so that the light detecting element can receive the light.

In addition, the processing circuit (a) controls the light emitting element of the far infrared sensing device so that, at a desired time, light emission corresponding to far infrared rays from an intruder is incident on the light sensing element of the far infrared sensing device; , a light emitting element driving means for driving, and (b) pseudo level detection corresponding to the level detection output obtained from the level detection circuit when pseudo far infrared rays are incident on the light detection element of the far infrared sensing device. Based on the output,
a first inspection means for inspecting whether it is normal;
(c) If the pseudo level detection output is tested as normal by the first testing means, a test signal sufficient to prevent the alarm signal from being output is output to the alarm signal output circuit. (d) a second means for inputting a test feedback signal from the alarm signal output circuit based on the test signal output to the alarm signal output circuit and testing whether or not it is normal; and (e) when the first testing means tests that the pseudo-1-novel detection output is abnormal, or when the second testing means tests the test feedback signal as abnormal. In this case, the failure indication signal output means for outputting the failure indication signal is set to the right (right).

Effects and Effects According to the far-infrared sensing device according to the present invention, as in the case of the conventional far-infrared sensing device that reaches − in FIG. Since it has the housed configuration -15=, if an intruder approaches the far infrared sensing device, the far infrared rays emitted from the intruder will be detected as in the case of the conventional far infrared sensing device described above in FIG. Infrared rays enter the photodetecting element through the far-infrared entrance window of the case-like body,
In response, a far-infrared detection output is obtained from the far-infrared sensing device. Therefore, by using the far-infrared ray detection output, it is possible to detect that an intruder has entered the position where the far-infrared sensing device is located.

However, in the case of the far infrared sensing device according to the present invention,
A light-emitting element is installed in the case-like body so that the light from the light-emitting element can be received by the light-detecting element without having to pass the light through the far-infrared entrance window, so if the light-emitting element is driven when desired, , the light from the light-emitting element can be used as pseudo far-infrared rays corresponding to the far-infrared rays radiated from the intruder when the intruder approaches the far-infrared sensing device. can.

In this case, the far infrared sensing device operates normally and 1
If the far-infrared sensing device is in a state where is obtained. However, unless the far-infrared sensing device is in a state where it can operate normally, such pseudo-far-infrared detection output cannot be obtained normally.

Therefore, it is possible to detect whether the far-infrared sensing device is in a state where it can operate normally, depending on whether the pseudo-far-infrared detection output is normally obtained.

Therefore, according to the far-infrared sensing device according to the present invention, it is not necessary to set the far-infrared sensing device to the same state as when an intruder actually enters the far-infrared sensing device to detect whether it is in a state where it can operate normally. Both can be done easily.

Further, according to the far-infrared sensing device according to the present invention, it is possible to detect whether or not the above-mentioned far-infrared sensing device is in a state where it can operate normally. Since this can be done with the configuration of (), it is possible to detect whether the far infrared sensing device is operating normally or not, without making the far infrared sensing device large, complicated, or expensive. It never happens.

Further, according to the far-infrared sensing device of the present invention, the light-detecting element can receive light from the light emitting element provided in the case-like body without passing through the far-infrared incident window on the case-like body. Therefore, it is possible to detect whether or not the above-mentioned far-infrared sensing device is operating normally by making the light from the light emitting device directly enter the light detecting device without attenuating it. Since the detection is
It can be done efficiently and reliably.

Furthermore, according to the far-infrared intruder detection device according to the present invention,
As in the case of the conventional far-infrared intruder detection device described above in FIG. Therefore, as in the case of the conventional far-infrared intruder detection device described above, the far-infrared detection device is placed at a position to detect the intrusion of an intruder, and the level detection circuit and processing In the case of the conventional far-infrared intruder detection device described above in FIG. Similarly, a far infrared detection output is obtained, and based on this, the level detection circuit outputs the 8th
As in the case of the conventional far-infrared intruder detection device described above in the figure, the level detection output is 1, and furthermore, from the intruder detection means of the processing circuit, the conventional light detection is As in the case of the element, an intruder detection output is obtained, and based on this, an alarm signal is output from the alarm signal output circuit as in the case of the conventional far-infrared intruder detection device described above in FIG. is reduced to 1q.

Furthermore, if the intruder does not come close to the far-infrared sensing device, the far-infrared sensing device will output a normal far-infrared detection output, as in the case of the conventional far-infrared intruder detection device described above in Figure 8. Because of this,
The level detection circuit, processing circuit, and alarm signal output circuit also output normal level detection output, intruder detection output, and alarm signal, respectively, as in the case of the conventional far-infrared intruder detection device described above in Figure 8. I can't get it.

Therefore, the far-infrared intruder detection device according to the present invention also has the eighth
As in the case of the conventional far-infrared intruder detection device described above in the figure, it functions as an intruder detection device.

However, in the case of the far-infrared intruder detection device according to the present invention, the far-infrared sensing device has a light emitting element as described above for the far-infrared sensing device according to the present invention, and
Since the processing circuit has a light emitting element drive signal output means,
The light emitting element drive signal from the light emitting element drive signal output means can drive the light emitting element of the far infrared sensing device when desired.

Therefore, when the light emitting element of the far infrared sensing device is driven, a pseudo far infrared detection output is obtained from the far infrared sensing device, as described above in the far infrared sensing device according to the present invention, and based on this, a pseudo far infrared detection output is obtained. A pseudo level detection output corresponding to the level detection output obtained when far infrared rays from an intruder are incident on the photodetection element of the far infrared sensing device is obtained from the level detection circuit. Further, based on this pseudo level detection output, when the first testing means of the processing circuit tests that the pseudo level detection output is normal, a test signal is obtained from the test signal output means, This is output to the alarm signal output circuit.

On the other hand, even if the alarm signal output circuit receives a test signal from the first test means of the processing circuit, it is similar to the one obtained when far infrared rays from an intruder are incident on the light detection element of the far infrared sensing device. does not output alarm signals.

Further, the second test means of the processing circuit is configured to check that the test signal outputted from the test signal output means of the processing circuit to the alarm signal output circuit and the test feedback signal from the alarm signal output circuit are normal. Inspect whether or not. However, if the first testing means of the C1 processing circuit tests that the pseudo level detection output is abnormal, or the second testing means of the processing circuit tests that the test feedback signal is abnormal. In this case, a failure indication signal is output from the failure indication signal output means of the processing circuit.

In this case, the fact that the pseudo level detection output is inspected as abnormal by the first inspection means of the processing circuit means that one or both of the level detection circuit and the far infrared sensing device in the previous stage of the processing circuit are malfunctioning. It means there is. Furthermore, the fact that the test feedback signal is found to be abnormal by the second test means of the processing circuit means that the alarm signal output circuit at the subsequent stage of the processing circuit is out of order. Therefore,
The fact that a failure indication signal is output from the failure indication signal output means of the processing circuit means that the far-infrared intruder detection device is out of order. Therefore, depending on whether the failure indication signal is 1q, the far infrared intruder detection device will
Always working 1'? It is possible to detect whether or not the vehicle is in a state of

Therefore, according to the far-infrared intruder detection device according to the present invention, by outputting the failure indication signal obtained from the failure indication signal output means of the processing circuit to the position where the far-infrared intruder detection device is managed, the far-infrared intruder detection device can be detected. Far-infrared rays can be detected without having to go from the location where the detection device is located to where it is installed, or without having to set the same state as when an intruder actually approaches the far-infrared sensing device. It is possible to easily detect whether or not an intruder detection device is in a state where it can operate normally without requiring much effort and time.

Furthermore, according to the far-infrared intruder detection device according to the present invention,
The far-infrared sensing device used for this purpose is simply a case-like body of a conventional far-infrared sensing device with a light-emitting element (with the IM configuration, a pseudo far-infrared detection output can be obtained from the far-infrared sensing device). Therefore, the far-infrared sensing device used to detect whether the above-mentioned far-infrared intruder detection device is in a state where it can operate normally can be used without being large, obtrusive, or expensive. Therefore, in order to detect whether or not the far-infrared intruder detection device is in a state where it can operate normally, the far-infrared infrared intruder detection device does not become large, complicated, or expensive.

In general, according to the far-infrared intruder detection device according to the present invention, the far-infrared sensing device used therein has a far-infrared incident window that directs light from a light emitting element provided in the case-like body into the case-like body. The far infrared rays can be detected by allowing the light to be received by the light-sensing element without passing through the light-emitting element, so that the light from the light-emitting element is directly incident on the light-sensing element without being substantially attenuated. Since the pseudo far-infrared detection output is obtained from the device, the pseudo-far-infrared detection output can be obtained efficiently and reliably, so that the far-infrared intruder detection device can operate normally. It is possible to efficiently and reliably detect whether or not the

Embodiment 1 Next, an embodiment of the far-infrared sensing device A according to the present invention will be described with reference to FIGS. 1 to 4.

d3 in FIGS. 1 to 4, corresponding parts to those in FIG. 7 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The far-infrared sensing device according to the present invention shown in FIGS. 1 to 4 is similar to the conventional far-infrared sensing device A described above in FIG. The conventional far-infrared sensing device A described above in FIG. 7 is different from the conventional far-infrared sensing device A described above in FIG. If you want a similar configuration right. Note that the light emitting element 10
For example, a light-emitting diode configured using GAP, which is easily and inexpensively available, can be used. 19. Also, as shown in the figure, one having a terminal piece 11 and a lens 12 is used.

In this case, the light emitting element 10 is connected to the terminal piece 11 as shown in the figure.
and a lens 12, as shown in FIGS. 1 and 2, a window 13 is provided on the side wall of the cap-like body 3 of the case-like body 1.
The light-emitting element 10 is mounted on the side wall of the cap-like body 3 of the case-like body 1, with the lens 12 of the light-emitting element 10 facing inside the window 13 from outside the case-like body 1.
The configuration is obtained by extending the terminal piece 11 of 0 in the lateral direction outside the case-like body 1. Also, as shown in Figure 3,
A window 171 is provided in the base 2 of the case-like body 1, and the light-emitting element 10 is placed on the outer surface of the base 2 of the case-like body 1, and the lens 12 of the light-emitting element 10 is inserted into the window 14 from outside the case-like body 1. The terminal piece 11 of the light emitting element 10 may be provided in a state where it is exposed and the terminal piece 11 of the light emitting element 10 is not extended downwardly outside the case-like body 1. Furthermore, as shown in FIG.
The terminals 11 of the light-emitting element 10 may be provided on the inner surface 1 of the base 2 in such a manner that they do not penetrate through the base 2 and extend downward.

The following is the details of the embodiment of the far-infrared sensing device A according to the present invention.

According to the far infrared sensing device according to the present invention having such a configuration, except for the above-mentioned matters, the seventh
Since it has the same configuration as the conventional far-infrared sensing device A shown in FIG. If an intruder approaches the sensing device Δ, and based on this, far infrared rays SO from the intruder enters the photodetecting element 6 as shown by a square wave at No. 9N, the far infrared rays SO of the far infrared sensing device Δ Far-infrared detection outputs SA as shown in FIG. ,3
*If an intruder approaches infrared sensing device No. 8,
For the same reason as described above for the conventional far-infrared sensing device in the figure, the infrared cotton plug output SA cannot be obtained from the far-infrared sensing circuit 7.

Therefore, according to the far-infrared sensing device Δ according to the present invention shown in FIG. It can be used to detect when an intruder has entered a location where the system is currently being used.

However, in the case of the far-infrared sensing device A according to the present invention shown in FIGS.
However, since the light SO' is provided in the case-like body 7 so that the light detection element 6 can receive the light without passing it through the far-infrared entrance window 5, the light-emitting element 6 can be used when desired. When driven, the light SO' from the photodetector element 6 is
The pseudo far-infrared rays can be made to enter the photodetecting element 6 as pseudo far-infrared rays corresponding to the far-infrared rays SO radiated from the intruder when the intruder approaches the far-infrared sensing device.

In this case, if the far-infrared sensing device A is in a state where it can operate normally, far-infrared rays emitted from the intruder from the far-infrared detection circuit 7 of the far-infrared 1 sensing device A to the photodetecting element 6 are emitted from the intruder. When SO is incident, a pseudo far-infrared detection output S8' similar to the far-infrared detection output SA obtained from the far-infrared detection circuit 7 of the far-infrared sensing device A is obtained,
It is output to a predetermined terminal piece among the plurality of terminal pieces 9. In this case, the pseudo-far-infrared detection output SA' is such that the light SO' from the light-emitting element 10 as pseudo-far-infrared rays is transmitted to the photodetector element 6 in the form of a rectangular wave in FIG. If the pulse is incident in a certain interval, as shown in FIG. 6C, which is the same as that reached in FIG. 9B, a pair of positive and negative pulses consisting of a differential wave of the rectangular wave is obtained.

However, unless the far-infrared sensing device A is in a state where it can operate normally, such pseudo far-infrared detection output S8' cannot be obtained. Therefore, pseudo far infrared detection output SA
By checking whether or not ' can be obtained normally, it is possible to detect whether or not the far-infrared sensing device A is in a state where it can operate normally.

Therefore, according to the far-infrared sensing device according to the present invention shown in FIGS. 1 to 4, it is possible to detect whether or not the far-infrared sensing device is in a state where it can operate normally. This can be easily done without setting the same conditions as when intruding.

Furthermore, according to the far-infrared sensing device A according to the present invention shown in FIGS. noj
A light emitting element 10 is attached to the case-like body 1 of the infrared sensing device △.
=Q (jHowever, since this can be done with the configuration of , it doesn't get expensive.

Furthermore, according to the far-infrared sensing device Δ shown in FIGS. 1 to 4, the light emitting element 10 provided in the case-like body 1
The light SO' from the light emitting element 10 is received by the light detecting element 6 without passing through the far-infrared incident window 5 located on the right side of the case-like body 1, and therefore the light SO' from the light emitting element 10 is attenuated. Since it is detected whether the above-mentioned far-infrared sensing device is in a state where it can operate normally, the far-infrared rays are detected by making the light directly enter the photodetecting element 6 without causing any damage. It can be done efficiently and reliably.

Example? Next, an embodiment of the far-infrared intruder detection device according to the present invention will be described with reference to FIG.

In FIG. 5, parts corresponding to those in FIG. 8 are denoted by the same reference numerals, and detailed description thereof will be omitted.

The far-infrared intruder detection device according to the present invention shown in FIG.
It has the same configuration as the conventional far-infrared intruder detection device described above in FIG. 8, except for the following points.

That is, as the far-infrared sensing device A, the far-infrared sensing device A according to the present invention described above with reference to FIGS. 1 to 4 is used. That is, the far infrared sensing device A etc., the case-like body 1
In this case, a configuration is used in which the light-emitting element 10 receives the light SO' from the light-emitting element 10 without passing it through the far-infrared entrance window 5 and the light-detecting element 6 receives the light.

Also, based on the level detection output SR from the processing circuit C and the C level detection circuit B, it is determined whether far infrared rays -31=outside rays SO from an intruder are incident on the light detection element 6 of the far infrared sensing device A. In addition to having an intruder detection means similar to that of the conventional far-infrared intruder detection device described above in FIG.

That is, when desired, the light emitting element 10 of the far-infrared sensing device A can emit light SO' corresponding to the far-infrared ray SO from the intruder being incident on the photodetecting element 6 of the far-infrared sensing device A. In order to achieve this, a light emitting element drive signal output means (not shown) is provided which outputs a light emitting element drive signal SC2 to be driven.

In this case, the light emitting element drive signal ratio means has a timer, and outputs the light emitting element drive signal gSC2 at a desired time set in the timer, for example, on a predetermined day. At a predetermined time, for example, as shown in FIG. 6A, far infrared rays SO from an intruder enters the photodetecting element 6 of the far infrared sensing device A in the form of a rectangular wave as shown in FIG. 9A. and output as a square wave. Incidentally, if the light emitting element 10 of the far infrared sensing device Δ is driven by the light emitting element drive signal SC2 made of a rectangular wave shown in FIG. Therefore, the light SO' from the intruder is detected in the photodetecting element 6 of the far infrared sensing device A, and the far infrared ray so from the intruder is
Corresponding to the incident as shown in Figure A, the width section of the rectangular wave of the light emitting element drive signal SC2, as pseudo far infrared
It is incident.

Furthermore, if the light So' from the light emitting element 10 is incident on the light detection element 6 of the far infrared sensing device Δ as pseudo far infrared rays, the level detection circuit B will generate the light as described above in FIG. Since the pseudo level detection output SB' corresponding to the level detection output SB obtained based on the iH infrared SO from the intruder being incident on the light detection element 6 of the far infrared sensing device A is obtained. , based on the pseudo far infrared detection horn sB', a first inspection means is provided to inspect whether it is normal or not.

In this case, the pseudo level detection output SB' is generated from the level detection circuit B based on the fact that the far infrared ray S○ is incident on the photodetection element 6 of the far infrared sensing device A from the intruder. However, when the above-mentioned pair of pulses is obtained in FIG. 9C, for example, as shown in FIG. 6, the first inspection means is , whether that pair of pulses exists,
Even if a pair of pulses exists, it is detected whether the pseudo level detection output SB' is normal or not based on whether it has a predetermined amplitude or not.

Further, when the first test means tests that the pseudo level detection output SB' is normal, the test signal output means outputs the test signal SC3 to the alarm signal output circuit. Ru.

In this case, the test signal SC3 is the far infrared sensing VC device A.
Based on the fact that far infrared rays SO is applied from the intruder to the photodetecting element 6 of the intruder, the intruder detection output SC1 obtained from the inspection means is obtained in the form of a rectangular wave, for example, as shown in Figure 9. Correspondingly, as shown in FIG. 6, a rectangular wave is generated, but the width of the signal is, even if the test signal QSC3 is supplied to the alarm signal output circuit. The width is narrow enough so that the alarm signal SOS consisting of a rectangular wave as shown in FIG. 9F, for example, cannot be obtained from the alarm signal output circuit.

In addition, it returns to the test signal SC3 outputted to the alarm signal output circuit by the test fa output means, inputs the test feedback signal @SC3' obtained from the alarm signal output circuit, and confirms that it is normal. It has a second inspection means for inspecting whether or not it exists.

In this case, the test signal SC3 is supplied to the relay circuit if the alarm signal output circuit is constituted by a relay circuit as described above in FIG.
The test return signal SC3' is passed through the return path C1 of the relay circuit to which the test signal SC3 is supplied, so that the test return signal SC3' is a rectangular wave shown in FIG. 9F. 1q, as shown in FIG. 9F, a rectangular wave similar to the test signal SC3 is obtained.

= 35 - In addition, in this case, the second testing means generates a testing feedback signal SC3 consisting of a rectangular wave shown in FIG.
' exists, but even if it does exist, it is checked to see if it has the expected amplitude and whether it is a test feedback signal.

Furthermore, if the first testing means tests the pseudo level detection output SB' as abnormal after being tested as described above, or The second test means tests the test feedback signal SC3' as described above, and if the test feedback signal SC3' is found to be abnormal, outputs a failure indication signal SC4. It has a failure indication signal output means.

In this case, the failure indication signal output means outputs the failure indication signal SC.
4 is output to, for example, an alarm signal output circuit.

Further, the failure indication signal output means transmits far infrared rays S from an intruder to the light detection element 6 of the far infrared sensing device A from the inspection means.
When the intruder detection output SC1 that is output based on the input of O is made into a rectangular wave as shown in FIG. Then, a rectangular wave similar to the intruder detection output SC1 is output.

In addition, when the failure indication signal output means outputs the failure indication signal SC4 made of such a rectangular wave to the alarm signal output circuit, the intruder detection output SC1 shown in Figure 6 is output from the alarm signal output circuit. Based on the input shown in Figure 9E 1-
In response to the fact that W Hoi No. 5 SD is out, the 6th
A signal made of a rectangular wave similar to the failure indication signal SC4 as shown in FIG. H is output as the failure indication signal Sl')4.

Further, the failure indication signal output means outputs the failure indication signal SC4 to, for example, the intruder detection and display circuit.The failure indication signal output means outputs the failure indication signal SC4 to the intruder detection and display circuit. In this case, in the intruder detection display circuit ", if the fault display signal S (l) is not output, the fault display signal 8S03 in the intruder detection display circuit "is outputted.
As shown in FIG. 6I, the line section of the fault indication signal SC4,
Driving is displayed.

The above is the configuration of the embodiment of the far-infrared intruder detection device according to the present invention.

According to the far-infrared intruder detection device according to the present invention having such a configuration, it has the same configuration as the conventional far-infrared intruder detection device described above in FIG. 8, except for the above-mentioned matters. Although detailed explanation is omitted, similar to the conventional far-infrared intruder detection device described above in FIG. C and the alarm signal output circuit, the far-infrared sensing device A is placed at a position to detect intrusion of an intruder, as in the case of the conventional far-infrared intruder detection device described above in FIG. In addition, another level detection circuit B1
If an intruder approaches the far-infrared sensing device A with the processing circuit C and the alarm signal output circuit arranged in other positions, the far-infrared sensing device A will emit the conventional far-infrared rays described above in FIG. As in the case of the intruder detection device, the far-infrared detection output SA is obtained, and based on this, from the level detection circuit B, the same as in the case of the conventional far-infrared intruder detection device described above in FIG. Then, the level detection output SB is obtained, and roughly,
From the intruder detection means of the processing circuit C, an intruder detection output SC1 is generated as in the case of the conventional photodetection element described above in FIG.
Based on this, from the alarm signal output circuit,
As in the case of the conventional far-infrared intruder detection device described above with reference to FIG. 8, an alarm signal SD is obtained.

Furthermore, if an intruder does not come close to the far-infrared sensing device A, the far-infrared sensing device A will output a far-infrared detection output as in the case of the conventional far-infrared intruder detection device described above in FIG. SA cannot be obtained normally, and therefore level detection circuit B
, from the ffi logic circuit C and the alarm signal output circuit, the eighth
As in the case of the conventional far-infrared intruder detection device described above in the figure, the level detection output SB and the intruder detection output S
C1 and alarm signal SD cannot be obtained.

Therefore, the far-infrared intruder detection device according to the present invention shown in FIG. have

However, in the case of the far-infrared infrared intruder detection device according to the present invention, the far-infrared sensing device Δ has the light emitting element 10 as described above with respect to the far-infrared sensing device according to the present invention with reference to FIGS. 1 to 4. and the processing circuit C has
Since the light emitting element drive signal 8 output means is provided, the light emitting element 10 of the far infrared sensing device A is controlled by the light emitting element drive signal SC2 as shown in FIG. 6A from the light emitting element drive signal 8 output means. , it can be driven when desired.

Therefore, the light emitting element 10 to the far infrared sensing device is
When the far-infrared sensing device according to the present invention described above with reference to FIG. 4 is driven as described above and, for example, as shown in FIG. The light SO' enters the photodetecting element 6 of the far-infrared sensing device A as shown in FIG. 6B, and therefore, from the far-infrared sensing device A, as shown in FIG. A detection output S8' is obtained.

Therefore, from the level detection circuit B, the far infrared sensing device A
When the far infrared rays SO from an intruder is incident on the photodetecting element 6 of SB' is obtained.

Roughly speaking, based on this pseudo level detection output S[3', if the first testing means of the processing circuit C tests that the pseudo level detection output SB' is normal, the processing circuit C is tested. For example, a test signal 8SC3 as shown in FIG. 6E is obtained from the signal output means, and is output to the alarm 43g output circuit.

In this case, the test signal SC3+ can be obtained as a rectangular wave, similar to the intruder detection output SC1 shown in Figure 9, for example.
Since the width of the rectangular wave is narrower than the intruder detection output SC1, the alarm signal output circuit receives the test signal from the first test means of the processing circuit C! ;38
Even if C3 is received, an alarm signal SD similar to that obtained by j3 when far-infrared mso from an intruder is incident on the photodetecting element 6 of the far-infrared sensing device Δ is not output to the external line F.

The second test means of the processing circuit C also outputs a test signal SC3 from the test signal output circuit to the alarm signal output circuit from the test signal output means of the processing circuit C.
For example, a test feedback signal SC3' as shown in FIG.
i) Check whether E is constant.

The first testing means of the processing circuit C then detects the pseudo level detection output SF! If the test feedback signal SC3' is tested to be normal, or if the test feedback signal SC3' is tested to be abnormal by the second test means of the processing circuit C, a failure indication of the processing circuit C is displayed. A failure indication signal SC4 as shown in FIG. 6G is output from the output means to the alarm signal output circuit, and in response to this, the c1 alarm signal output circuit is Failure indication signal SD as shown
4 to line E.

Further, the failure indication signal S(l) is also output to, for example, an intruder detection and display circuit, and the failure indication signal SC4 is displayed on the intruder detection and display circuit as shown in FIG. 6I.

In this case, the fact that the first testing means of the processing circuit C tests that the pseudo level detection output SB' is abnormal is as follows.
This means that one or both of the level detection circuit B and the far-infrared sensing device A, which are located before the processing circuit C, are out of order.

Furthermore, the fact that the test feedback signal SC3' is found to be abnormal by the second testing means of the processing circuit C means that the alarm signal output circuit at the subsequent stage of the processing circuit C is malfunctioning. means.

Therefore, the failure indication signal SC4 is output from the failure indication signal output means of the processing circuit C, and in response, the failure indication signal SD4 is output from the alarm signal output circuit. Display of the failure indication signal SC4 means that the three infrared intruder detection devices are out of order.

Therefore, the failure indication signal +'3SC4 is obtained from the failure indication signal output means of the processing circuit C, and depending on whether or not the failure indication signal SD4 is obtained from the -U%7 information signal output circuit, , depending on whether the failure display signal SC4 is displayed by the intruder detection display circuit.
It is possible to detect whether the far-infrared infrared intruder detection device is in a state where it can operate normally.

Accordingly, according to the far-infrared intruder detection device according to the present invention as shown in FIG. By extending the line on which the display signal SD4 is output to the position where the far-infrared intruder detection device is managed, the line can be extended from the position where the far-infrared intruder detection device is managed to the position where it is installed. It is possible to determine whether the far-infrared infrared intruder detection device is operating normally without having to go there or setting the far-infrared detection device A in the same condition as when an intruder actually approaches. This detection can be easily performed without requiring much effort or time.

According to the far-infrared intruder detection device according to the present invention as shown in FIG.
Far-infrared sensing device according to the present invention shown in FIGS. 1 to 4 △
As mentioned above, the light emitting element 10 is simply provided in the case-like body 1 of the conventional far-infrared sensing device A.
By drawing this, a pseudo far-infrared detection output SA' is obtained from the far-infrared sensing device A, which is used to detect whether the above-mentioned far-infrared intruder detection device is in a state where it can operate normally. Far-infrared sensing devices do not need to be large, complicated, or expensive; An intruder detection device does not become large, complicated, or expensive.

Further, according to the far-infrared intruder detection device according to the present invention shown in FIG. 5, the far-infrared detection device Δ
However, the light SO' from the light emitting element 10 installed in the case-like body 1 can be received by the light-detecting element 6 without passing through the far-infrared rays into the case-like body 1!31 window 5. In this way, the light SO' from the light emitting element 10 is made to directly enter the light detection element 6 without being substantially attenuated, and a pseudo far infrared detection output is obtained from the far infrared sensing device Δ. SA', the pseudo far-infrared detection output SA can be obtained efficiently and reliably, and therefore it is possible to determine whether the far-infrared intruder detection device is in a state where it can operate normally. Detection can be performed efficiently and reliably.

Incidentally, the above description merely shows one embodiment of the far-infrared sensing device and the far-infrared intruder detection device according to the present invention, and, for example, failures detected from the inspection signal output means of the processing circuit C It is also possible to directly output the display signal SC4 to another line other than the line without going through the alarm signal output device. Variations and changes may be made.

[Brief explanation of the drawing]

FIG. 1, FIG. 2, FIG. 3, and FIG. 4 are line sectional views each showing an embodiment of a far-infrared sensing device according to the present invention. FIG. 5 is a systematic connection diagram showing an embodiment of the far-infrared intruder detection device according to the present invention. FIG. 6 is a waveform diagram for explaining this. FIG. 7 is a sectional view showing a conventional far-infrared sensing device. FIG. 8 is a schematic connection diagram showing a conventional far-infrared intruder detection device 6. As shown in FIG. FIG. 9 is a waveform diagram for explaining (a). 1... Case-like body 2... Base body 3... Cap-like body 4... Upper plate part 5... Far-infrared entrance window 6... Light detection element 7... Far-infrared detection circuit 8...
...Wiring board 9...Terminal piece 10...Light emitting element 11...Terminal piece 12...・Lens A・・・・・・Far-infrared sensing device B・・・・・・
・・・Level detection circuit C・・・・・・Processing circuit D・・・・・・Alarm signal output circuit
...Line F......Intruder detection display circuit SA...
...Far infrared detection output SA' ...Pseudo far infrared detection output SS ...Level detection output SB' ...Pseudo level detection output SC1...・
...Intruder detection output SC2...Light emitting element drive signal SC3...Inspection signal SC3'...Inspection return signal SC4...Failure display signal SD4. ...Failure display signal SD...Yτ alarm signal SO...J infrared SO'...Pseudo far infrared rays applicant Comprehensive security guarantee Nippon Aleph Co., Ltd. 1) Open IF; 63-204188 (14) Figure 6 E-G School Figure 7

Claims (1)

[Claims] 1. In a far-infrared detection device that houses at least a light-detecting element in a case-like body having a far-infrared entrance window, a light-emitting element is provided in the case-like body to transmit light from the light-emitting element to the above-mentioned case. A far-infrared sensing device, characterized in that it is provided so that the above-mentioned photodetecting element can receive light without passing through a far-infrared entrance window. 2. A far-infrared sensing device that houses at least a light detection element in a case-like body having a far-infrared entrance window; and a level detection circuit that detects the level of far-infrared detection output from the far-infrared sensing device; a processing circuit having an intruder detection means for detecting whether far infrared rays from an intruder are incident on the light detection element of the far infrared sensing device based on the level detection output from the level detection circuit; Based on the intruder detection output from the intruder detection means of the processing circuit, an alarm signal that outputs an alarm signal when far infrared rays from an intruder are incident on the light detection element of the far infrared sensing device In the far-infrared intruder detection device having an output circuit, the far-infrared sensing device has a light-emitting element in the case-like body, and the light-sensing element detects the light-emitting element even if the light from the light-emitting element does not pass through the far-infrared entrance window. To be able to receive light,
and the processing circuit (a) causes the light emitting element of the far infrared sensing device to emit light corresponding to input of far infrared rays from an intruder into the light sensing element of the far infrared sensing device at a desired time; (b) light from the light emitting element is incident on the far infrared sensing element of the far infrared sensing device as pseudo far infrared rays; A first testing means for testing whether or not the pseudo level detection output corresponding to the level detection output obtained from the level detection circuit is normal; (c) If the pseudo level detection output is tested as normal by the first test means, a test signal sufficient to prevent the alarm signal from being outputted to the alarm signal output circuit. (d) inputting a test feedback signal from the alarm signal output circuit based on the test signal output to the alarm signal output circuit, and checking whether it is normal; (e) if the first testing means tests that the pseudo level detection output is abnormal; A far-infrared infrared intruder detection device further comprising a failure indication signal output means for outputting a failure indication signal when the inspection feedback signal is found to be abnormal.