JPH0816940A - Intrusion alarm device - Google Patents

Abstract

(57) [Summary] [Purpose] To perform inspection of the detection function of the human body detection element installed in a private house without directly going to the place where the human body detection element is installed. A human body detector 2 includes a pyroelectric infrared sensor 8, a porous filter for changing an ambient temperature near the pyroelectric infrared sensor 8, and a moving means 1 for rotating the porous filter.
1 and 17 are provided. In addition to the management circuit 5, a control circuit for driving the moving means 11 and 17 and an electric signal S ₂ from the pyroelectric infrared sensor 8 are input to the receiver _3, and an inspection signal based on the electric signal S ₂ is input. A self-inspection circuit 6 including a drive circuit for outputting S ₄ to the alarm device 4 is provided. [Effect] As a result, the labor for inspection and the inspection time can be greatly shortened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intrusion alarm device, and more particularly to an intrusion alarm device for detecting intrusion of a human body by a human body detection element.

[0002]

2. Description of the Related Art Since an intrusion alarm device has conventionally been required to have reliability, a pyroelectric infrared sensor or an ultrasonic sensor disposed on the ceiling of each room of a house or the like. Human body detection elements such as the above do not operate normally, but are regularly inspected so that they operate reliably only when they are abnormal. As shown in FIG. 5, an intrusion alarm device provided with such a human body detecting element is installed in a house and a human body detector 51 provided with a human body detecting element 54 and a human body detector 51 are provided.
It is composed of a receiver 52 to which the electric signal S ₁₀ output from the human body detecting element 54 provided in is input and an alarm device 53 driven by an alarm signal S ₂₀ from the receiver 52.

In such a structure, the human body detecting element 54
In the case of performing the inspection of 1., as shown in FIG. 6, the inspector A directly performs the inspection in the room 50 or the like in which the human body detecting element 54 is installed,
The human body detecting element 54 is driven, and at this time, the alarm device 5
The detection function of the human body detection element 54 is confirmed by whether or not 3 sounds. However, in the case of a private house, there are restrictions on the inspection such as the privacy of the individual and the inspection time zone, so the inspection method of the human body detection element and the visit time are limited. Further, in the case of an apartment house or a large factory, since the number of human body detecting elements installed is very large, it takes much labor and time for the inspector to directly inspect all the human body detecting elements.

[0004]

[Purpose] The present invention has been made to solve the above-mentioned conventional problems, and the inspection of the detection function of the human body detecting element installed in a personal house or the like is performed by installing the human body detecting element. An object of the present invention is to provide an intrusion alarm device that can be implemented without going directly to a place.

[0005]

The intrusion alarm device of the present invention which achieves the above object has a pyroelectric infrared sensor for detecting infrared rays emitted by the temperature of a human body and a pyroelectric infrared sensor installed in a house. Human body detector provided with a type infrared sensor, and a receiver for receiving an electric signal output from a pyroelectric infrared sensor provided in the human body detector and driving an alarm means, The human body detector was provided with a porous filter for changing the ambient temperature in the vicinity of the pyroelectric infrared sensor and a moving means for moving the porous filter. The receiver was driven by the moving means and moved by the moving means. A porous filter changes the ambient temperature in the vicinity of the pyroelectric infrared sensor, and the alarm means is driven only when the pyroelectric infrared sensor is driven by this ambient temperature change. It is those with a circuit.

Further, the intrusion alarm device of the present invention is installed in a house and an ultrasonic sensor for detecting a human body by oscillating ultrasonic waves and detecting reflected ultrasonic waves reflected by the human body. An intrusion alarm device including a human body detector provided with an ultrasonic sensor and a receiver for driving an alarm means by receiving an electric signal output from the ultrasonic sensor provided in the human body detector, An ultrasonic reflection plate for reflecting the ultrasonic waves oscillated from the ultrasonic sensor and a moving means for moving the ultrasonic reflection plate are provided inside the receiver, and the receiver is driven by the moving means and moved by the moving means. The ultrasonic reflecting plate reflects the ultrasonic waves oscillated from the ultrasonic sensor, and is provided with a self-inspection circuit for driving the alarm means only when the ultrasonic sensor is driven by the reflected ultrasonic waves.

In the intrusion alarm device of the present invention having such a structure, the moving means uses a motor for rotating the light reflecting plate. Further, in the intrusion alarm device of the present invention, the moving means uses an electromagnetic valve that linearly reciprocates the light reflecting plate.

[0008]

In the intrusion alarm device, in order to test the detection function of the pyroelectric infrared sensor, only the porous filter for changing the ambient temperature is moved to a position facing the pyroelectric infrared sensor by the motor or the electromagnetic valve. The pyroelectric infrared sensor can be driven by. Further, such a detection function test of the pyroelectric infrared sensor is performed by providing a self-inspection circuit separately from the normal management circuit, so that the operation confirmation of each of the plurality of installed pyroelectric infrared sensors can be surely performed. Can be done. Accordingly, the inspection of the pyroelectric infrared sensor can be performed without the inspector directly going to the place where the pyroelectric infrared sensor is installed.

Even when the human body detecting element provided in the human body detector is an ultrasonic sensor, an ultrasonic reflecting plate for reflecting ultrasonic waves is superposed by a motor or a solenoid valve as in the pyroelectric infrared sensor. The ultrasonic sensor can be brought into a driven state only by moving the ultrasonic sensor to a position facing the ultrasonic sensor.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the intrusion alarm device of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the intrusion alarm device of the present invention receives, for example, a human body detector 2 installed on the ceiling of each room of a private house, and electric signals S ₁ and S ₂ output from the human body detector 2. Receiver 3 and receiver 3
And an alarm device 4 which is an alarm means driven by a signal from the.

The human body detector 2 is, as shown in FIG.
A pyroelectric infrared sensor 8 that detects infrared rays emitted from the human body based on the temperature of the human body, a porous filter 9 that changes the atmospheric temperature in the vicinity of the pyroelectric infrared sensor 8, and a porous filter 9 via a support arm 10. A motor 11 that is fixed and is a moving means that rotates the porous filter 9, a mounting plate 12 that fixes the pyroelectric infrared sensor 8 and the motor 11 to the ceiling 14 and the like, and a cover 13 that protects them.
It has and.

The pyroelectric infrared sensor 8 uses a pyroelectric material such as LiTaO ₃ . In the pyroelectric material, the spontaneous polarization changes due to infrared irradiation, blocking, or temperature change, and the charge on the crystal surface becomes nonequilibrium. By extracting this non-equilibrium charge as a voltage change, the pyroelectric infrared sensor 8
Can detect far infrared rays of about 3 to 9.5 μm emitted from the human body.

The porous filter 9 is for inspecting the detection function of the pyroelectric infrared sensor 8 and is provided with a plurality of holes as shown in FIG. 2 (b). The porous filter 9 is rotated by driving the motor 11 to a position facing the pyroelectric infrared sensor 8 at the time of inspection, and normally faces the pyroelectric infrared sensor 8 (when an intruder is detected). Rotate to a position that is out of position. This porous filter 9
Moves to a position opposite to the pyroelectric infrared sensor 8,
Since a temperature difference occurs between the plurality of holes of the porous filter 9 and a portion where the plurality of holes are not formed, a temperature change occurs in the vicinity of the pyroelectric infrared sensor 8, so that the pyroelectric infrared sensor 8 is driven. Can be made.

As shown in FIG. 1, the receiver 3 includes a management circuit 5 used in a state of detecting an intruder and a self-inspection circuit used in the detection function test of the pyroelectric infrared sensor 8. 6 and a changeover switch 7 for selectively changing over the management circuit 5 or the self-inspection circuit 6. The management circuit 5 inputs an electric signal S ₁ from a pyroelectric infrared sensor 8 which detects an intruder when a person invades each room of a personal house in which the human body detector 2 is installed, and the electric signal S _The alarm signal S ₃ based on ₁ is output to the alarm device 4. As shown in FIG. 3, the self-inspection circuit 6 includes a control circuit 15 for controlling the motor 11 and a pyroelectric infrared sensor 8 in the human body detector 2.
A drive circuit 1 for inputting an electric signal S ₂ output from the device and outputting an inspection signal S ₄ based on the electric signal to an alarm device 4.
6 is comprised.

The alarm device 4 has an alarm signal S ₃ from the management circuit 5 selected by the changeover switch 7 or a self-inspection circuit 6
It is driven by either one of the inspection signals S ₄ from. As such an alarm device 4, for example, a voice alarm device, an alarm display device or the like is used. In such an intrusion alarm device 1, normally, that is, when the control circuit 5 is selected by the changeover switch 7, the porous filter 11 for inspecting the pyroelectric infrared sensor 8 is the pyroelectric infrared sensor 8 Is out of position relative to. Therefore, the alarm device 4 is driven via the management circuit 5 only when a person enters the room in which the human body detector 2 is installed.

On the other hand, when the self-inspection circuit 6 is selected by the changeover switch 7, the detection function of the pyroelectric infrared sensor 8 can be inspected. In the detection function inspection of the pyroelectric infrared sensor 8, the control circuit 15 provided in the self-inspection circuit 6 drives the motor 11 to move the porous filter 9 to a position facing the pyroelectric infrared sensor 8. When the porous filter 9 is moved to a position facing the pyroelectric infrared sensor 8, the ambient temperature around the pyroelectric infrared sensor 8 changes, so that the pyroelectric infrared sensor 8 is in a driving state and the electric signal S ₂ is input to the drive circuit 16 provided in the self-inspection circuit 6. The drive circuit 16 receives the inspection signal S ₄ based on the electric signal S ₂ from the pyroelectric infrared sensor 8.
Is input to the alarm device 4, and the alarm device 4 is sounded as an alarm test.

As a result, the inspector uses the pyroelectric infrared sensor 8
The pyroelectric infrared sensor 8 can be inspected without directly going to the room in which the human body detector 2 provided with is installed. In addition, as shown in FIG.
May be fixed to the solenoid valve 17 which is a moving unit that linearly reciprocates the porous filter 9 that changes the ambient temperature near the pyroelectric infrared sensor 8. In this case, at the time of inspection, the solenoid valve 17 is driven to linearly move the porous filter 9 to a position opposite to the pyroelectric infrared sensor 8, and in the normal state (when detecting an intruder), the pyroelectric type is used. A linear movement is made from a position facing the infrared sensor 8 to a position deviating from the position.

The human body detector 20 having the above structure is
It is driven and controlled by a self-inspection circuit 6 including a control circuit 15 for controlling the solenoid valve 17 and a drive circuit 16 for driving the alarm device 4 based on the electric signal S ₂ output from the pyroelectric infrared sensor 8. (Fig. 3). In the intrusion alarm device 1 in which such a porous filter 9 is moved by the electromagnetic valve 17, the porous filter 9 for inspecting the pyroelectric infrared sensor 8 is normally displaced from the position facing the pyroelectric infrared sensor 8. ing. Therefore, in order to inspect the detection function of the pyroelectric infrared sensor 8, the solenoid valve 17 is driven by the control circuit 15 provided in the self-inspection circuit 6 so that the porous filter 9 faces the pyroelectric infrared sensor 8. Move straight to the position. As a result, the ambient temperature in the vicinity of the pyroelectric infrared sensor 8 can be changed, so that the pyroelectric infrared sensor 8 is driven and the electric signal S ₂ is sent to the self-inspection circuit 6
Input to the drive circuit 16 provided therein. Drive circuit 1
Reference numeral 6 inputs the inspection signal S ₄ to the alarm device 4 based on the electric signal S ₂ from the pyroelectric infrared sensor 8, and sounds the alarm device 4 as an alarm test.

As a result, similarly to the case where the motor 11 is used as the moving means, the inspector does not have to go directly to the room in which the human body detector 20 provided with the pyroelectric infrared sensor 8 is installed, The electric infrared sensor 8 can be inspected. In the above examples, the pyroelectric infrared sensor was used as the human body detecting element,
Not limited to this, the ultrasonic sensor 21 as shown in FIGS. 2A, 2C, and 4 may be used. Piezoelectric ceramics are often used as the sound source of the ultrasonic sensor 21, and when used as an ultrasonic transmitter, a voltage is applied to the piezoelectric ceramics to apply it, and a mechanical strain corresponding to the voltage and frequency is generated to cause vibration. Let On the contrary, when vibration is applied to the piezoelectric ceramic, an electric charge is generated, so that ultrasonic waves can be detected.

The ultrasonic sensor 21 having such characteristics
And an ultrasonic wave reflection plate 22 for reflecting the ultrasonic wave oscillated from the ultrasonic wave oscillator of the ultrasonic wave sensor 21.
It is installed so that it can be moved to a position opposite to 1. When the ultrasonic wave reflection plate 22 is fixed to the motor 11, the ultrasonic wave reflection plate 22 is rotated by the motor 11 so that the ultrasonic wave reflection plate 22 is rotated to a position opposite to the ultrasonic wave sensor 21 at the time of inspection, and is normally rotated. It can be rotated by a required rotation angle so as to move away from the position facing 21. Further, by linearly reciprocating the ultrasonic reflecting plate 22 with the electromagnetic valve 17, the ultrasonic reflecting plate 22 is linearly moved to a position facing the ultrasonic sensor 21 at the time of inspection, and is normally deviated from the position facing the ultrasonic sensor 21. A predetermined distance can be moved linearly.

This allows the inspector to inspect the ultrasonic sensor 21 without directly going to the room where the human body detector 20 provided with the ultrasonic sensor 21 is installed. Although the motor and the electromagnetic valve are used as the moving means in the above embodiments, the present invention is not limited to this, and as long as the porous filter or the ultrasonic reflection plate 22 can be moved, any kind of device can be used. Good.

Further, although the intrusion alarm device of the present invention is applied to an individual house in the above embodiments, the present invention is not limited to this, and may be applied to an apartment house or a large factory. In this case, since the self-inspection circuit is provided in addition to the normal management circuit, it is possible to surely confirm the operation of the plurality of installed photoelectric sensors without malfunction.

[0023]

As is apparent from the above embodiments, according to the intrusion alarm device of the present invention, the human body detector has a porous filter for changing the ambient temperature near the pyroelectric infrared sensor, and a porous filter. The moving means is driven in the receiver, and the porous filter moved by the moving means changes the ambient temperature in the vicinity of the pyroelectric infrared sensor. Type self-inspection circuit for driving the alarm means only when the infrared sensor is driven, or an ultrasonic reflector for reflecting the ultrasonic waves oscillated by the ultrasonic sensor and an ultrasonic reflector in the human body detector. A moving means for moving the receiving means, driving the moving means in the receiver, and reflecting the ultrasonic waves oscillated from the ultrasonic sensor by the ultrasonic reflector moved by the moving means, Since it has a self-inspection circuit that drives the alarm means only when the ultrasonic sensor is driven by the emitted ultrasonic waves, the inspection of the detection function of the pyroelectric infrared sensor or ultrasonic sensor installed in a private house, etc. It can be performed without the inspector directly going to the place where the sensor is installed. Therefore, in the case of a private house, it does not harm the privacy of the individual, the degree of freedom increases during the inspection time, and in the case of an apartment house or a large factory, the inspector needs to directly inspect the installed photoelectric sensor. Therefore, the labor for inspection and the inspection time can be greatly reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a control system showing an embodiment of an intrusion alarm device of the present invention.

FIG. 2 is a diagram showing a human body detector provided with a motor as an example of the intrusion alarm device of the present invention, in which (a) is a sectional view,
(B), (c) is an arrow A view.

FIG. 3 is a block diagram showing a part of a control system as an embodiment of the intrusion alarm device of the present invention.

FIG. 4 is a cross-sectional view showing a human body detector provided with a solenoid valve as an embodiment of the intrusion alarm device of the present invention.

FIG. 5 is a block diagram of a control system of a conventional intrusion alarm device.

FIG. 6 is a diagram illustrating a conventional inspection method for an intrusion alarm device.

[Explanation of symbols]

1 ... Intrusion alarm device 2, 20 ... Human body detector 3 ... Receiver 4 ... Alarm device (alarm means) 5 ... Management circuit 6 ... Self-inspection circuit 8 ... Pyroelectric infrared sensor 9 ... Porous filter 11 ... Motor (moving means) ) 15 ... Control circuit 16 ... Drive circuit 17 ... Solenoid valve (moving means) 21 ... Ultrasonic sensor 22 ... Ultrasonic reflectors S ₁ , S ₂ ... Electrical signals

Claims (4)

[Claims] 1. A pyroelectric infrared sensor for detecting infrared rays emitted by the temperature of a human body, a human body detector installed in a house and provided with the pyroelectric infrared sensor, and a human body detector. In an intrusion alarm device including a receiver for driving an alarm means by receiving an electric signal output from the provided pyroelectric infrared sensor, an atmosphere near the pyroelectric infrared sensor in the human body detector. The pyroelectric infrared sensor includes a porous filter that changes the temperature and a moving unit that moves the porous filter. The receiver drives the moving unit, and the porous filter moved by the moving unit is the pyroelectric infrared sensor. A self-inspection circuit that drives the alarm means only when the ambient temperature in the vicinity is changed and the pyroelectric infrared sensor is driven by the change in ambient temperature. Intrusion alarm device, characterized in that was e. 2. An ultrasonic sensor for detecting the human body by oscillating an ultrasonic wave and detecting the reflected ultrasonic wave reflected by the human body, and the ultrasonic sensor provided in a house and provided with the ultrasonic sensor. A human body detector, and a receiver for driving an alarm means to which an electric signal output from the ultrasonic sensor provided in the human body detector is input, in the human body detector. An ultrasonic reflection plate for reflecting the ultrasonic waves oscillated from the ultrasonic sensor, and a moving means for moving the ultrasonic reflection plate, the receiver driving the moving means, and The ultrasonic wave reflector moved by the moving means reflects the ultrasonic wave oscillated from the ultrasonic sensor, and drives the alarm means only when the ultrasonic wave sensor is driven by the reflected ultrasonic wave. Intrusion alarm system characterized by comprising a self-test circuit for. 3. The intrusion alarm device according to claim 1, wherein the moving means uses a motor for rotating the light reflecting plate. 4. The intrusion alarm device according to claim 1, wherein the moving means uses an electromagnetic valve that linearly reciprocates the light reflecting plate.