JPH08194875A - Monitoring system - Google Patents

Abstract

PURPOSE: To detect human movement by a sensor and to generate an alarm when the moving direction is not normal. CONSTITUTION: Sensors 1 are arranged on plural positions in a monitoring area. Signals from respective sensors are inputted from a sensor signal input part 2 to a memory part 3 through a control part 10 and recorded in respective areas set up correspondingly to respective sensors at a time interval set up by a setting part 9. Preceding data recorded in the memory part 3 are read out and inputted to a comparing part 4 together with data recording time, a difference between both the data is calculated and the difference data are inputted to a discriminating part 5 to discriminate human movement. An alarm or the like is outputted from an output part 6 in accordance with a signal outputted from the discriminating part 5, a monitoring camera 8 is simultaneously controlled through a camera control part 7, an area from which a doubtful person is detected is photographed, and a video signal is outputted to display a picture on a monitor which is not shown.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surveillance system, and more particularly to a system for discriminating a suspicious person based on signals from a plurality of sensors.

[0002]

2. Description of the Related Art A surveillance system is provided with a pyroelectric infrared sensor for detecting the heat of a human body in the front or an infrared sensor for detecting the passage of a person by blocking infrared rays. There is something that informs the existence of a person. In such a system, there is a problem in that a person who has passed in front of the sensor notifies the user that he is not a suspicious person, and it is difficult to distinguish between a suspicious person and a non-suspicious person.

[0003]

SUMMARY OF THE INVENTION In view of the above, the present invention is a suspicious person when sensors are installed at a plurality of places to detect the movement of a person and the movement of the person is in an unnatural order. It is to make a warning and judge.

[0004]

In order to solve the above-mentioned problems, the present invention requires a sensor for detecting a person installed at a plurality of places and data from the sensor in a monitoring system for monitoring a suspicious person. A memory unit that records at time intervals,
A comparison unit that reads out the data recorded in the memory unit and compares it with the data to be recorded next, a determination unit that determines the movement of a person based on a signal from the comparison unit, an output unit that outputs monitoring information, The present invention provides a monitoring system including a sensor, a memory unit, a comparing unit, a discriminating unit, and a control unit that controls the output unit, and outputs suspicious person information based on a signal from the discriminating unit.

[0005]

With the above configuration, in the surveillance system according to the present invention, when a person is detected by the sensors installed at a plurality of places, there is no abnormality depending on how the person moves, warning,
The warning is released or an abnormality is discriminated, and when a warning or an abnormality occurs, the alarm is notified and the image from the camera is sent.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a monitoring system according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of essential parts of an embodiment of a monitoring system according to the present invention. In the figure, reference numeral 1 denotes sensors (plurality), which are installed at a plurality of locations within a monitoring area and detect a person in front. Reference numeral 2 denotes a sensor signal input unit, which inputs a signal from the sensor 1. 3 is a memory part,
The detection data of each sensor 1 input via the sensor signal input unit 2 is recorded for each sensor at a required time interval. Reference numeral 4 denotes a comparison unit, which reads the previously recorded data from the memory unit 3 and compares it with the data recorded this time in the memory unit 3. 5
Is a discriminating unit which discriminates the movement of a person based on the signal from the comparing unit 4. An output unit 6 outputs an alarm or the like based on the signal from the determination unit 5. A camera control unit 7 controls a plurality of cameras 8. The cameras 8 are installed at a plurality of locations in the monitoring area, and each set visual field is imaged and a video signal is output. A setting unit 9 sets a time interval for recording data in the memory unit 3. A control unit 10 controls each unit.

Next, the operation of the surveillance system according to the present invention will be described. FIG. 2A shows an example in which this monitoring system is installed in an automatic teller machine corner of a bank or the like.
The sensor 1 (plurality) is configured, for example, by arranging a pyroelectric infrared sensor element, which outputs a signal in response to heat of a human body in front, in a matrix type and by providing a convex lens in front of the sensor element, the number of people This is a sensor in which the number of responding sensor elements increases or decreases. This sensor 1 is in the automated teller machine corner 11 ~
Place it in each place. That is, a person who enters the corner 11 from the entrance / exit 12 goes through the area of, operates to the area of, operates the automatic teller machine 13, and exits from the entrance / exit 12 through the area of. Since the route of →→→ is a normal route, “No abnormality” is set as shown in FIG. However, if a person who has advanced to the area does not go out and enters the area after opening the door 14 that should not be needed, it is necessary to monitor the subsequent actions, so it is "alert", and the area from the door 14 remains as it is. In this example, the warning is released if the user returns to the area, but if the user goes to the area in front of the door 15 leading to the office 16 without returning to the area, an alarm of "abnormal" is set.

When a person is detected by each sensor, the sensor 1
Is input to the memory unit 3 from the sensor signal input unit 2 via the control unit 10, and the data is recorded in the storage area set for each sensor. The record of this data is
The data is recorded at the time interval set by the setting unit 9 via the control unit 10. At the time of this data recording, the data previously recorded in the memory unit 3 is read out, and the data recorded in the memory unit 3 this time is read together with the comparison unit 4 Enter in, compare the difference between the previous time and this time,
The difference data is input to the determination unit 5 to determine the movement of a person.

This comparison and determination will be described with reference to the example shown in FIG. The figure shows an example in which the sensors are installed at three locations, A, B, and C. The sensor A detects 3 persons two times before, the sensor B and the sensor C have zero number of detections, and the last time the sensor A has two persons and the sensor B. Indicates that one person is detected by the sensor C, zero by the sensor C, and this time, one person is detected by each of the sensor A, the sensor B, and the sensor C. The comparison unit 4 compares the previous-previous time with the previous time, compares the previous time with the current time, and inputs the difference data to the determination unit 5. Then, by the determination unit 5, one of the three persons who were in the area of the sensor A two times before last moved to the area of the sensor B by the previous time, and the one person who was in the area of the sensor B by this time is the sensor. While moving to the area C, it is determined that one of the two persons who were in the area of the sensor A previously moved to the area of the sensor B.

Based on the discrimination by the discriminating section 5, FIG.
As shown in (b), the output unit 6 outputs information such as "warning", "warning cancellation", or "abnormal situation occurrence". Then, for example, in the example of FIG. 2, when a person advances to the area of or, time-lapse recording of the image from the camera 8 installed in the corner 11 is performed. An alarm signal is sent to call attention, and the camera 8 installed in this corner is controlled to display an image on a monitor or the like in the office, or a communication line is connected to a security center or the like to generate a warning signal or an abnormality. The image of the camera 8 is sent to the security center together with the notification signal of. Alternatively, the turning device attached to the camera 8 may be driven to point the camera 8 in the direction in which the suspicious person has entered or zoomed in to output a magnified image of the suspicious person.

Alternatively, for example, this monitoring system may be installed to monitor the approach of a person to a dangerous material or the like. That is, sensors are arranged at a plurality of places around a dangerous substance, etc., and the signals of these sensors are applied to an AND operation circuit, and each of the sensors outputs a signal when a person is detected. In this way, an alarm sound may be emitted based on this signal to call attention to leave the place, or a prerecorded voice may be used as an alarm.

[0012]

As described above, according to the monitoring system of the present invention, the sensors for detecting a person are installed at a plurality of places to detect the movement of the person, and the person moves to the warning area or the abnormal area. In each case, appropriate notification is given,
By properly setting these areas, abnormal movements are not reported in normal human movements, and an alarm or abnormal state is notified when human movements are not normal. Can be prevented.

[Brief description of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of a monitoring system according to the present invention.

FIG. 2 is an example of the arrangement of sensors in the surveillance system according to the invention.

FIG. 3 is a diagram for explaining the determination of the movement of a person in the surveillance system according to the present invention.

[Explanation of symbols]

 1 Sensor (plural) 2 Sensor signal input part 3 Memory part 4 Comparison part 5 Discrimination part 6 Output part 7 Camera control part 8 Television camera for monitoring (plurality) 9 Setting part 10 Control part

Claims (7)

[Claims] 1. A monitoring system for monitoring a suspicious person, etc., a sensor for detecting a person installed at a plurality of locations, a memory section for recording data from each sensor at required time intervals, and a memory section for recording data. The read data and compares it with the data to be recorded next in the memory unit, the determination unit that determines the movement of a person based on the signal from the comparison unit, the output unit that outputs the monitoring information, and the sensor. , A memory unit, a comparison unit, a determination unit and a control unit for controlling the output unit,
A monitoring system that outputs suspicious person information based on a signal from the discrimination unit. 2. The sensor is arranged so that pyroelectric infrared sensor elements are arranged in a matrix and a convex lens is provided on the front surface to detect a radiation type range so that the number of people can be detected. The monitoring system according to claim 1. 3. The memory section is provided with a sensor map so that data from each sensor is recorded at the same location for each sensor, and the comparing section compares data recorded at the same location of the memory section. The monitoring system according to claim 1, wherein the monitoring system is provided. 4. The method according to claim 1, wherein a setting section is provided and a time interval for recording data in the memory section is set.
Alternatively, the monitoring system according to claim 3. 5. A monitoring television camera is installed, the monitoring television camera is controlled based on a signal from the discriminating unit, and an image is output from the monitoring television camera. The monitoring system according to claim 2, claim 3, or claim 4. 6. A plurality of surveillance television cameras are installed, a surveillance range is divided and imaged, and a corresponding surveillance television camera is switched based on a signal from the discriminating section to output an image. The monitoring system according to claim 1, claim 2, claim 3, or claim 4 configured as described above. 7. A turning device is attached to the surveillance television camera, and the turning device is controlled based on a signal from the discriminating unit to change the angle of the surveillance television camera. Item 6. The monitoring system according to Item 6.