JP3243406B2 - Intruder alarm - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an intruder alarm provided with an infrared sensor.

[0002]

2. Description of the Related Art Conventional intruder alarms generally use a pyroelectric infrared sensor.
A Fresnel lens is provided in a case containing the sensor element, and infrared rays from outside the case are collected, the sensor output is amplified by an electric circuit, and output as a contact signal. In the case of an intruder alarm with such a simple configuration, changes in the environment around the monitored area and false alarms caused by small animals such as dogs and cats have become major issues, and the cost of dispatching security guards due to the false alarms has been a major issue. It is quite expensive.

For this reason, the accuracy is reduced by increasing the number of detectors to four, such as four, to reduce the sensitivity to small animals, to reduce malfunctions caused by radio waves from a car telephone, etc., and to use the detector together with an intruder alarm using microwaves. Attempts have been made to improve the system, such as raising it, but it has not reached a satisfactory level.

[0004] Further, as shown in FIG.
A system is employed in which a staff member constantly monitors the monitoring target area while watching the monitor TV 43 in a separate room. However, such a system consumes a large amount of power and increases labor costs. For example, it can be used for a large-scale system that monitors the entire building, but is not suitable for a small-scale system such as a small store or a general home.

The present invention has been made in consideration of the above-mentioned matters, and has as its object to provide an intruder alarm device capable of minimizing false information as much as possible and reliably obtaining information on an intruder. That is.

[0006]

In order to achieve the above object, according to the present invention, in one case, a human body sensor for detecting infrared rays from a human body that has entered a monitored area, and a monitoring camera for photographing the monitored area. By providing the above, the situation of the monitoring target area can be confirmed also by the video.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, one case includes:
In one case, a human body sensor that senses infrared rays from a human body that has entered the monitored area, a monitoring camera that captures the monitored area using a detection signal from the human body sensor as a trigger, and one still image from the monitoring camera Or a frame memory for temporarily storing a plurality of frames, a modem for converting a still image and sending it to a telephone line toward a preset location, and a control unit for controlling these devices. Since the image of the area can be confirmed with eyes, false alarms can be reduced.

In this case, a strobe for temporarily illuminating the monitored area may be provided. In this case, a clear image can be obtained even when the monitored area is dark, such as at night, and an effect of being able to threaten an intruder can be expected.

[0009]

Embodiments will be described with reference to the drawings. 1 to 3 show one embodiment of the present invention. First,
FIG. 1 shows an example of a monitoring system incorporating an intruder alarm 1 of the present invention. In the illustrated example, the intruder alarm 1 is a corridor (monitoring area) 2 of an apartment or the like.
Is installed on the upper part of the side wall 3. Reference numeral 4 denotes a relay station of a telephone company. The intruder alarm 1 is connected via a telephone line 5, and a personal computer 6 as an output terminal, a facsimile 7, a monitor television 8 of a monitoring station, etc. are connected via a telephone line 9. Connected.

The configuration of the intruder alarm 1 will be described with reference to FIGS. First, in FIG.
10 is a thin rectangular parallelepiped case made of an appropriate material.
A control board 11 is housed inside. The control board 11 captures an image of the monitoring target area 2 and a human body sensor 12 that senses infrared IR (see FIG. 3) from a person (human body) M intruding (existing) in the monitoring target area 2. Monitoring camera 13, strobe 14 for temporarily illuminating monitoring target area 2, monitoring camera 1
Frame memory 1 for temporarily storing still images by
5, a modem 16 for converting a still image and sending it to the telephone line 5, a microcomputer unit (hereinafter referred to as an MCU) 17 as a control unit for controlling these devices 12 to 16, and the telephone line 5. Jack 18
And so on. 5a is a connection terminal.

As shown in FIG. 3, the human body sensor 12 accommodates, for example, a multi-element type sensor section 12a having a plurality of detection elements in a metal container and a circuit 12b for processing a detection signal of the sensor section 12a. In addition, this is a pyroelectric multi-element detector in which a window 12c sealed with, for example, a Fresnel lens is provided at a position corresponding to the pyroelectric element of the metal container. An example of such a pyroelectric multi-element detector is disclosed in Japanese Patent Application No. 6-339709 by the present applicant. The human body sensor 12 is mounted on the control board 11 via the mounting base 19 such that the window 12c faces the outside of the case 10. When the human M enters the monitored area 2, the human body sensor 12 detects this. And outputs a sensing signal a to the MCU 17.

As shown in FIG. 3, the surveillance camera 13 comprises, for example, a CCD camera main body 13a and a video circuit 13b. Sensor 1
2 is attached to the control board 11 so as to face the same monitoring target area 2. This surveillance camera 13
Performs photographing using the control signal b from the MCU 17 as a trigger, and transmits the image signal c to the MCU via the video circuit 13b.
17 is sent.

The strobe 14 is, as shown in FIG.
It comprises a flash unit 14a and a flash control circuit 14b, and is provided so as to be able to illuminate the same monitoring target area 2 as the monitoring camera 13. The strobe 14 is operated by a control signal d from the MCU 17 when it is dark such as at night.

The frame memory 15 is appropriately mounted on the control board 11 via the printed circuit board 20 and converts the still image signals sent by the MCU 17 as still image data e (see FIG. 3) at regular time intervals. Remember.

[0015] As shown in FIG.
The CU 17 modulates the still image signal f transmitted to the transmission signal h and outputs the modulated signal h to the telephone line 5.

As shown in FIG. 3, the MCU 17 is mounted on the control board 11 via an appropriate board 21 and controls the intruder alarm 1 as a whole.

In the intruder alarm 1 having the above-described configuration, when the person M enters (exists) the monitoring target area 2, the human body sensor 12 detects this and the sensing signal a is input to the MCU 17.

The MCU 17 receiving the sensing signal a sends the control signal a to the monitoring camera 13. This control signal a
The surveillance camera 13 having received the image triggers the photographing of the person M who has entered the monitoring target area 2 and sends out two to four images obtained as a still image signal c to the MCU 17. .

The MCU 17 receiving the still image signal c
Sends the still image data e to the frame memory 15 and temporarily stores it in the frame memory 15, and sends a still image signal f to the modem 16, and the modulated signal h is output to the telephone line 4. .

A plurality of still image data e temporarily stored in the frame memory 15 and data h output to the telephone line 4 via the modem 16 are respectively provided with date and time, place, and the like.

The data h placed on the telephone line 4 is sent to the personal computer 5 or facsimile 6 as an output terminal or the monitor television 7 of the monitoring station via the relay station 8 and the line 8, and is monitored. It is possible to grasp the intrusion situation of the person M in the monitoring target area 2 even at a position away from the vehicle.

In the intruder alarm 1,
The person M who invades the monitoring target area 2 and exists there
Is not only detected by the human body sensor 12 but also a still image of the person M itself can be obtained by the monitoring camera 13 based on the detection result.
Unlike a conventional intruder alarm, information about an intruder can be obtained accurately.

When the area 2 to be monitored is dark, such as at night, the strobe 14 may be operated in accordance with the operation of the monitoring camera 13, so that a clearer image can be obtained. . Also, this strobe 1
4 may be operated irrespective of the lightness or darkness of the monitoring target area 2. In such a case, the suspicious person may be threatened.

In the case where, for example, one building has a plurality of monitored areas, one intruder alarm 1 is provided for each monitored area.

[0025]

The intruder alarm of the present invention is provided with an infrared sensor for detecting infrared rays from a human body that has entered the monitored area and a monitoring camera for photographing the monitored area in one case. It is very compact and can be easily installed with almost no place choice.

Then, when an alarm is received from the intruder alarm, the image in the monitored area can be confirmed with the eyes, so that the situation in the monitored area can be accurately grasped, and a correct judgment can be made. Can be expected.

Changes in the surrounding environment and false alarms caused by small animals can be reduced.
Time loss can be greatly reduced.

Further, since one or more still images are sent by the surveillance camera by using a detection signal of a human body sensor for detecting infrared rays from the human body as a trigger, compared to a conventional system in which a camera is installed and a monitoring target area is constantly monitored. Therefore, the communication cost is low, and a plurality of monitoring target areas can be monitored by one line.

By operating the strobe together with the operation of the surveillance camera, an intruder, particularly a suspicious person, is threatened and can be immediately evacuated.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration example of a monitoring system incorporating an intruder alarm of the present invention.

FIG. 2 is a perspective view showing an example of a configuration of the intruder alarm device in a see-through manner.

FIG. 3 is a block diagram showing an example of a configuration of the intruder alarm.

FIG. 4 is a diagram for explaining a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Intruder alarm, 2 ... Monitoring area, 5 ... Telephone line, 10 ... Case, 12 ... Human body sensor, 13 ... Surveillance camera, 14 ... Strobe, 15 ... Frame memory, 16 ... Modem, 17 ... Control part, M: human (human body), IR: infrared,
a: Sensing signal.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ identification code FIG08B 21/00 H04N 7/18 D H04N 7/18 G01V 9/04 (58) Fields surveyed (Int.Cl. ⁷ , DB name) ) G01J 5/48 G01J 1/02 G01J 5/02 G01V 8/10 G08B 13/196 G08B 21/00 H04N 7/18

Claims (2)

(57) [Claims] In one case, a human body sensor that detects infrared rays from a human body that has entered a monitoring target area, a monitoring camera that captures an image of the monitoring target area using a detection signal from the human body sensor as a trigger, and the monitoring camera A frame memory for temporarily storing one or more still images, a modem for converting the still images and sending them to a telephone line toward a preset location, and a control unit for controlling these devices are provided. An intruder alarm characterized by the following. 2. The intruder alarm according to claim 1, further comprising a strobe for temporarily illuminating the monitored area.