JPH04257996A - Human body detector - Google Patents

Abstract

PURPOSE:To improve ability for discriminating the human body and the other object. CONSTITUTION:An area to watch invaders is divided into plural areas. The respective divided areas are defined as the respective detection areas of plural sensor parts 10. According to the detection output conditions of the respective sensor parts 10, it is discriminated by a discrimination part 20 whether the detected object is the human body or not. Therefore, according to the detection output conditions of the respective sensor parts 10, the discrimination part 20 executes total judgement such as judging the movement of the detected object. Thus, ability is improved for discriminating the human body and the other object.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a human body detection device for detecting an intruder.

0002

2. Description of the Related Art Conventional security systems use human body detection sensors to detect intruders.

0003

However, the human body detection sensor described above has a problem in that it is difficult to reliably distinguish between people and other objects depending on the conditions of the warning area. The present invention has been made in view of the above-mentioned points, and its purpose is to provide a human body detection device that has a high ability to distinguish between people and other objects.

0004

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a plurality of sensor sections whose respective detection areas are divided areas into which an area for guarding against intruders is divided into a plurality of sections; The detection unit includes a determination unit that determines whether the detected object is a person based on the detection output status of the sensor unit.

[0005]

[Operation] By having the above-described configuration, the present invention makes a comprehensive judgment such as determining the movement of a detected object from the output status of the detection output of each sensor unit, and makes a comprehensive judgment between humans and other objects. This is designed to improve the discrimination ability.

[0006]

Embodiment FIGS. 1 to 3 show an embodiment of the present invention. In this embodiment, a security system incorporated in the office management system shown in FIG. 3 will be explained as an example. This office management system includes, in addition to the above security system A, a key management system B, a conference room reservation system C, and a sign display system D, and the monitoring of each system is centralized on a central monitoring panel E. The security system A, the key management system B, etc. monitor and control the systems through distributed processing using a sub-monitoring panel F composed of a CPU.

The crime prevention system A includes the sub-monitoring panel F and a human body detection device 1 connected to the sub-monitoring panel F by two signal lines.
It is composed of a plurality of terminal devices G, each of which has a load of . Here, a unique address is set for each terminal G, and the sub-monitoring panel F specifies the address of each terminal G, accesses each terminal G individually, and transmits signals by time division multiplexing. I do. By the way, in the case of this security system A, a terminal device G and a wall switch H, each of which uses a lighting fixture I as a load, are incorporated, and the lighting system is integrated. In other words, the security system A is generally activated when no one is in the office, such as at night, and the lighting system is activated when people are present, so both systems can be configured as one. In addition, in this crime prevention system, the period for operating the crime prevention system A is set by the detection condition setting device J, and when an intruder is detected, an alarm is issued by the terminal device G whose load is the alarm device K. and make an emergency report. In addition, when the security system A and the lighting system are integrated as described above, when a security guard patrols, the lighting equipment I can be automatically turned on and off depending on the patrol route, It is also possible to turn off or dim the lighting fixture I when no human body is present in order to save energy in a toilet or the like.

The features of this embodiment will be explained below. In this embodiment, as shown in FIG. 1, a human body detection device 1 serving as a load of a terminal device G includes a plurality of sensor sections 10, and the outputs of these sensor sections 10 discriminate between a human body and other objects. It is composed of a determining section 20. For example, when the entire room shown in FIG. 2 is used as a security area to guard against intruders, the security area is divided into divided areas a to p as shown in the figure, and respective sensor units 10 are installed as respective detection areas. , a sensing section 11 that senses a human body within the detection area, an amplifying section 12 that amplifies the sensing output, and a signal processing section 13 that converts the amplified output into a signal format suitable for signal processing by the discriminating section 20 and outputs it. It is configured. Note that the outputs of the respective sensor sections 10 are independently input to the discrimination section 20.

The determination unit 20 includes a detection unit 21 that detects whether a human body is detected by each sensor unit 10 based on the output of the sensor unit 10, and a detection unit 21 that reads the detection results from the detection unit 21 and reads them in chronological order. a data reading section 22 for storing data; an order detecting section 23 for detecting the order in which human bodies are detected by the sensor section 10 based on the stored data of the data reading section 22; The apparatus is comprised of a determining section 24 that determines whether the detected outputs of 10 are generated by humans or not, and a data creating section 25 that creates output data according to the determination results.

The operation of the discriminator 20 in this embodiment will be explained. Now, if we consider the case where a person enters from the entrance/exit 3 in FIG.
, l, o, the detection output should be obtained from any one of the sensor units 10. Therefore, for example, the sensor section 1 in the detection area p
If, for example, a detection output is obtained at the sensor unit 10 whose detection area is j after a detection output is obtained at 0, it can be considered that this is due to a factor other than humans. Therefore, in this case, the determination unit 24 determines that the object is not a person, and the human body detection device 1 does not output a detection signal. In addition, once a detection output is generated in the sensor unit 10 whose detection area is p, if the detection output is not continuously obtained within a certain period of time after that, it is assumed that the cause is due to factors other than humans. Since this can be considered, the determination unit 24 does not output a detection signal. Although the above case concerns intrusion through the doorway 3, it is possible to similarly distinguish between people and other objects in the case of intrusion through the window 4. In other words, the discrimination unit 20 can comprehensively determine whether something is a person or not, depending on the output status of the detection signals from the plurality of sensor units 10. Therefore, there is no need to use an expensive human body detection sensor that can reliably distinguish between people and other objects. Furthermore, in the case of this embodiment, detection signals such as primary warning and secondary warning can be output in stages until a human body can be reliably determined, thereby reducing the probability of false alarms. Note that the signal output section 5 provided at the output of the discrimination section 20 corresponds to the alarm K in FIG. 3, and has the function of issuing an alarm and sending a redirection output.

By the way, in the above case, the human body detection device 1 itself as a load on the terminal device G was configured as described above, but the sensor section 10 is used as a load on each terminal device G, and the discrimination section 20 The function may be provided to the CPU serving as the sub-monitoring panel F. Furthermore, if the gaps between the detection areas a to p of each of the sensor units 10 described above are set to be small, even minute movements of the sensing object can be detected, and more accurate judgment can be made between people and other objects. You can expect that.

0012

[Effects of the Invention] As described above, the present invention includes a plurality of sensor units each having a detection area divided into a plurality of divided areas in which an area to be guarded against intruders is detected, and detection based on the detection output status of each sensor unit. Since the sensor is equipped with a discrimination section that discriminates whether the object is a person or not, the discrimination section can make comprehensive judgments such as determining the movement of the detected object from the output status of the detection output of each sensor section. This can improve the ability to distinguish between people and other things.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of the same operation as above.

FIG. 3 is a configuration diagram of a crime prevention system including the above.

[Explanation of symbols]

1 Human body detection device 10 Sensor part 20 Discrimination section

Claims (1)

[Claims] [Claim 1] A plurality of sensor units whose detection areas are divided areas into a plurality of areas for guarding against intruders, and whether or not the detected object is a person based on the detection output status of each sensor unit. A human body detection device comprising: a discrimination section for discriminating.