JP2007299430A - Intrusion detection device with function of reducing false report - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intrusion detection device with a false report reduction function, capable of reducing any false report and correctly making report even in a setting place where false report is apt to occur. <P>SOLUTION: Since the sensitivity of each sensor 3 and the sensitivity of a camera 1 are adjusted in advance in accordance with a setting place to perform control so as to inhibit false report and correctly make report to prevent a sensitivity adjustment control part 21 from outputting report to be false report by compound determination caused by detection of a plurality of sensors 3 and the camera during a prescribed designated time period, false report can be reduced and report can be correctly made even in a setting place where false report is apt to occur. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an intrusion detection apparatus that detects an illegally intruded object using a camera that captures an image of a monitoring area and a sensor that detects the presence of the object, and more particularly to a false alarm reduction function thereof.

  This type of intrusion detection device is installed at a security site, such as outdoors or indoors in buildings such as ordinary houses and factories, and the camera always captures the surveillance area and illegally enters the surveillance area. When the sensor detects and issues a notification, the captured video is transmitted to the monitoring station and displayed on the monitor screen. This device is used for, for example, a security service in which a guard is active if there is a report. For example, a passive infrared sensor (PIR sensor) or a microwave applied radar sensor (MW sensor) is used as the sensor.

  As an example of a conventional intrusion detection device, a camera that captures a monitoring area and a sensor that detects the presence of an object are used, and a plurality of area blocks are superimposed and displayed on an image of the monitoring area on a monitor screen. Is known (see, for example, Patent Document 1).

By the way, in the conventional intrusion detection device, the same type of false alarm may occur on a daily basis depending on the installation location of the sensor. For example, in the sensor monitoring area, (1) if there is a person going in / out during commuting / commuting hours, (2) if buses and trains pass regularly, (3) with surrounding buildings This is the case when sunlight suddenly enters in a predetermined time zone. In these cases, although it is not illegal intrusion, it is detected as an illegally intruding object, and erroneous reporting is likely to occur.
Japanese Patent No. 3278085

  However, in the case where false alarms are frequently generated at the sensor installation sites as described above, the crime prevention function cannot be fully exhibited, so the problem that the intrusion detection device cannot actually be installed, and the power supply of the device only during the time when frequent false alarms occur. In the case of manually turning OFF, it is troublesome to turn OFF each time, and there is a problem that it is restricted to that time zone.

  An object of the present invention is to solve the above problems and provide an intrusion detection device with a false alarm reduction function capable of reducing false alarms even in an installation place where false alarms are likely to occur.

  In order to achieve the above object, an intrusion detection device with a false alarm reduction function according to one configuration of the present invention includes a camera for photographing a monitoring area and a sensor for detecting the presence of an object, and a sensor that detects an object that has illegally entered. Is issued based on at least one of the sensor detection information from the camera and the image detection information from the camera, and is issued based on the sensor detection information and the camera detection information that are erroneously reported in a predetermined designated time zone. A notification blocking control unit that performs control to block output is provided.

  According to this configuration, the alarm prevention control unit performs control to prevent output of alarm detection based on sensor detection information and camera detection information that are erroneously reported in a predetermined designated time zone. However, false alarms can be reduced.

  Preferably, a plurality of types of sensors are provided, and the alarm prevention control unit prevents false alarms for each sensor. The type of sensor depends on the detection line. In this case, since the output of the report can be prevented for each sensor in which the misreport occurs, it is possible to reduce the misreport and correctly report by the sensor whose report output is not blocked.

  Preferably, a timer for measuring time is provided, and the notification prevention control unit, when there is a report based on the sensor detection information and the camera detection information that becomes a false report in the designated time zone counted by the timer, Cancel alerts to prevent false alarms. Alternatively, the notification prevention control unit prevents false alarms by masking the camera and the sensor during the designated time period counted by the timer.

  An intrusion detection device with a false alarm reduction function according to another configuration of the present invention includes a camera for photographing a monitoring area and a sensor for detecting the presence of an object, and sensor detection information from the sensor that has detected the illegally intruded object and the camera. The sensor and the camera sensitivity are set in advance so as not to output a false alarm due to the detection of the sensor and the camera in a predetermined designated time zone. A sensitivity adjustment control unit that performs control to prevent false alarms is provided.

  According to this configuration, the sensitivity adjustment control unit adjusts the sensitivity of the sensor and the camera in advance so as not to output a false alarm due to the detection of the sensor and the camera in a predetermined designated time zone, and performs control to prevent the false alarm. As a result, it is possible to reduce false alarms even in an installation place where false alarms are likely to occur.

  Preferably, the video of the monitoring area is displayed on a monitor screen, and at least one of a sensor and a camera in the area block for each of a plurality of area blocks preliminarily displayed superimposed on the video of the monitoring area on the monitor screen. A detection information display circuit for displaying at least one of a detection frequency and a detection level by two detections, and the sensitivity adjustment control unit generates a notification in the designated time zone based on the notification information display in the area block. The sensitivity of the sensor and camera is adjusted in advance so as not to output, thereby preventing false alarms. In this case, since it becomes easy to grasp the cause of the report based on the report information in the area block displayed for each of the plurality of area blocks, the sensitivity of the sensor and the camera can be adjusted more easily and appropriately. Can do.

  Preferably, a detection condition setting unit for setting the designated time zone is provided. In this case, it is possible to easily set a designated time period for preventing the output of the notification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view showing an intrusion detection device with a false alarm reduction function according to an embodiment of the present invention, and FIG. 2 is a block configuration diagram thereof. As shown in FIG. 1, this apparatus detects an object Q such as a human body that illegally enters a predetermined security site outdoors or indoors in a building such as a general house or factory. A camera 1 that captures the monitoring area VA and a sensor 3 (3a, 3b) that detects the presence of the object Q in the monitoring area V are installed on the building wall and pillar P at the location. In this example, the monitoring area VA of the camera 1 is set wider than the monitoring area V of the sensor 3. When the object Q moves within the plurality of area blocks V0 to Vn set for the monitoring area V, the sensor 3 detects the object Q based on a change in the amount of detection lines received from the object Q.

  As shown in FIG. 2, the entire apparatus is controlled by a control unit 8 composed of, for example, a microcomputer, and displays an image of the monitoring area VA on the screen of the monitor 6 provided in the monitoring station 17 and illegally. Based on the sensor detection information from the sensor 3 that has detected the intruding object Q and the image detection information from the camera 1, the object Q is controlled to be notified to the monitoring station 17 when a predetermined intrusion condition is observed. Yes. In addition to the monitor 6, the monitoring station 17 is provided with a control switch 18, and the apparatus main body A excluding the monitoring station 17 is remotely controlled by the control switch (operation unit) 18 of the monitoring station 17 via the control unit 8. Operated.

  As the sensor 3, for example, two types of sensors, a passive infrared sensor (PIR sensor) 3a and a microwave applied radar sensor (MW sensor) 3b, are used. Sensor detection information is output via 4a and 4b. When the PIR sensor detects an object that emits infrared rays of a certain amount or more, the MW sensor detects the shape or speed of the moving object by using a reflected wave from the moving object, for example, by using the Doppler effect. The detection signal (sensor detection information) is output. In the detection by the sensor 3, a notification is issued when the detection signal is equal to or higher than a predetermined level. The PIR sensor 3a and the MW sensor 3b are provided with sensitivity adjustment units 3as and 3bs, respectively. The sensitivity adjustment units 3as and 3bs are, for example, a sensitivity volume for manual adjustment and an automatic sensitivity setting unit for automatic adjustment (both shown in FIG. Not shown).

  For example, a CCD camera is used as the camera 1, and a moving image signal from the CCD camera is subjected to predetermined signal processing such as amplification and addition of a synchronization signal in an image processing circuit 2 installed indoors. Then, it is converted into an image signal that can be displayed on the screen of the monitor 6, temporarily stored in the memory 5, and this image signal is intermittently output to the superimposing circuit 9. A video camera or the like may be used instead of the CCD camera. The camera 1 is also provided with a sensitivity adjustment unit 1s, and the sensitivity is adjusted by, for example, a mode switch (not shown) based on a sensitivity table.

  The object detection circuit 11 obtains image detection (image sensing) information by extracting a moving object having a predetermined size or more included in the image signal from the image processing circuit 2, and an object marker indicating the extracted moving object. Image processing for outputting a block display position signal for display on the screen of the monitor 6, that is, image processing for motion detection, which is a well-known image processing technique, is performed. Specifically, when a certain amount or more (for example, a certain pulse or more) of the luminance signal included in the image signal changes by a certain width or more within a certain time, the luminance signal has a certain magnitude or more. Image detection information is obtained, and a block display position signal for displaying a motion detection block (not shown) composed of an object marker such as a rectangular frame at the position of the moving object is obtained. And output to the control unit 8 and the object marker display circuit 12. This image detection information includes a moving direction in addition to the shape size and speed of the moving object. In detection by the camera 1, a notification is issued when the luminance signal is above a predetermined level. When the block display position signal is input, the object marker display circuit 12 generates an object marker display signal and supplies it to the superimposing circuit 9 via the display switching circuit 13. The object marker display circuit 12 may be omitted so that the object marker is not displayed.

  The area block display circuit 15 displays on the screen of the monitor 6 an area block corresponding to a plurality of area blocks V0 to Vn set in the monitoring area V for each sensor 3 while being superimposed on the video of the monitoring area VA. Let The area block display signal is stored in the memory 14 and is supplied from the control unit 8 to the area block display circuit 15. The superimposing circuit 9 superimposes the area block display signal supplied from the area block display circuit 15 via the display switching circuit 13 on the image signal from the image processing circuit 2, so that the monitoring area on the screen of the monitor 6 is displayed. An area block consisting of a rectangular frame is superimposed on the video. FIG. 3 shows a state in which, for example, an area block is superimposed on a PIR sensor.

  The notification information display circuit 16 displays the notification frequency and detection level notification information from each sensor 3 for each area block displayed on the screen of the monitor 6 by changing the type of red or blue color. Or display in shades of color. This notification information display signal is stored in the memory 14 and is given from the control unit 8 to the notification information display circuit 15. Similarly to the above, the notification information is superimposed on the video of the monitoring area VA on the screen of the monitor 6 by the superimposing circuit 9. For example, when the reporting information is displayed when the reporting frequency of the PIR sensor 3a is large and the reporting frequency of the MW sensor 3b is small, it is determined that sunlight has entered a specific area block.

  In the intrusion detection apparatus according to the present invention, the control unit 8 performs a control for blocking the output of a report based on the sensor detection information and the camera detection information that are erroneously reported in a predetermined designated time zone. It has. In addition, a timer 22 for measuring time is provided. That is, when there is a report based on the sensor detection information and the camera detection information in the designated time zone timed by the timer 22, the report blocking control unit 19 cancels the report and blocks a false report. . In addition, the output of a false alarm for each sensor 3 is blocked.

  In addition, instead of canceling the notification, the notification prevention control unit 19 undetects (masks) the sensor 3 and the camera 1 in the designated time period counted by the timer and outputs the notification. You may make it stop. For example, the sensor 3 and the camera 1 are made undetectable by turning off each power supply or covering each detection unit in a specified time zone.

  The detection condition setting unit 23 sets the specified time zone and the specified location (area block) for each sensor 3. Although this setting is manually performed by the input unit 24, it can also be automatically performed by external communication means based on the notification information in the area block stored in the memory 14. In this case, the specified time zone and the specified place can be set broadly and the types of the sensors 3 can be set to be large, so that it can be surely and efficiently set.

  The display selection unit 20 is provided in the control switch (operation unit) 18, and the above-described selection operation of each display is performed. Similarly, the sensitivity adjustment / timer control unit 21 is provided in the control switch (operation unit) 18, of which the timer control unit selects the designated time zone for the timer 22, and the sensitivity adjustment control unit Based on the notification information display in the area block, the sensitivity of the sensor and the camera is adjusted in advance in the designated time zone to perform control to prevent the output of the notification. The sensitivity adjustment control unit is, for example, a sensitivity changeover switch. When there are many erroneous reports by the PIR sensor 3a, the sensitivity of the PIR sensor 3a is lowered via the sensitivity adjustment unit 3as, and when there are many erroneous reports by the MW sensor 3b, the sensitivity is changed. The sensitivity of the MW sensor 3b is lowered via the adjustment unit 3bs. When there are many false alarms by the camera 1, the sensitivity of the camera 1 is lowered via the sensitivity adjustment unit 1s. Note that a control switch (operation unit) 18 may be separately provided in the apparatus main body A so that the apparatus main body A can be operated.

The operation of the intrusion detection apparatus having the above configuration will be described.
For example, if (1) misinformation occurs due to commuting or attending school during the commuting / commuting time period, and (2) misreporting due to regular traffic on buses or trains occurs, the notification will be prevented. The control unit 20 performs control so that even if there is a report by the detection of the sensor 3 or the camera 1 during the commuting / commuting time period and the traveling time period, the notification is not canceled and output. (3) When a false alarm occurs due to the sudden incidence of sunlight in a predetermined time zone in relation to surrounding buildings, the PIR sensor 3a and the camera 1 detect that the difference in light intensity is large. This is a misinformation due to the fact that the MW sensor 3b detects it. For this reason, the sensitivity adjustment control unit 21 adjusts the sensitivity of the PIR sensor 3a and the camera 1 so as not to be output in advance in this time zone based on the notification information display in the area block. The sensitivity of the sensor 3b is not lowered. Thereby, the sensitivity can be lowered to reduce false reports by the PIR sensor 3a and the camera 1, and a moving object can be detected by the MW sensor 3b having a normal sensitivity and can be reported correctly.

  Thus, according to the present invention, the notification prevention control unit 20 performs control to prevent the output of the notification based on the sensor detection information and the camera detection information that are erroneously reported in a predetermined designated time zone, and the sensitivity adjustment control unit 21 controls the sensitivity of the sensor 3 and the camera 1 in advance so as not to output a false alarm due to the detection of the sensor 3 and the camera 1 in a predetermined designated time zone, and performs control to prevent the false alarm. False alarms can be reduced even at installation sites that are prone to occur.

  In this embodiment, both the output blocking of the report by the report blocking control unit 20 and the sensitivity adjustment by the sensitivity adjustment control unit 21 are performed in a predetermined designated time zone, but only one of them is performed. May be.

  In each embodiment, two types of sensors, a passive infrared PIR sensor and a MW sensor, are used, but an active infrared AIR sensor or an ultrasonic sensor may be used instead. Three or more of these sensors may be used.

It is a schematic perspective view which shows the intrusion detection apparatus with a false alarm reduction function which concerns on one Embodiment of this invention. It is a block block diagram which shows the intrusion detection apparatus of FIG. It is a figure which shows the screen of a monitor.

Explanation of symbols

1: Camera 3: Sensor 3a: PIR sensor 3b: MW sensor 6: Monitor 11: Object detection circuit 16: Notification information display circuit 20: Notification prevention control unit 21: Sensitivity adjustment control unit 22: Timer 23: Detection condition setting Part Q: Object V, VA: Monitoring area

Claims (7)

Intrusion detection that includes a camera that captures a surveillance area and a sensor that detects the presence of an object, and that is triggered based on at least one of sensor detection information from a sensor that has detected an illegally intruded object and image detection information from the camera A device,
An intrusion detection device with a false alarm reduction function, comprising: a warning prevention control unit that performs control for blocking the output of a warning based on the sensor detection information and camera detection information that are erroneously reported in a predetermined designated time zone.   The intrusion detection device with a false alarm reduction function according to claim 1, wherein a plurality of types of sensors are provided, and the alarm prevention control unit prevents false alarms for each sensor. The timer according to claim 1, further comprising a timer for measuring time,
The alarm prevention control unit has an error reduction function for canceling the alarm and preventing the alarm when there is an alarm based on the sensor detection information and the camera detection information in the designated time zone timed by the timer. Intrusion detection device. The timer according to claim 1, further comprising a timer for measuring time,
The intrusion detection device with a false alarm reduction function that prevents the false alarm by making the camera and the sensor non-detection in the designated time zone timed by the timer. Intrusion detection that includes a camera that captures a surveillance area and a sensor that detects the presence of an object, and that is triggered based on at least one of sensor detection information from a sensor that has detected an illegally intruded object and image detection information from the camera A device,
A false alarm is provided with a sensitivity adjustment control unit that adjusts the sensitivity of the sensor and the camera in advance so that false alarms are not output due to the detection of the sensor and camera in a predetermined designated time zone, and controls to prevent false alarms. Intrusion detection device with a reduction function. In claim 5, the video of the monitoring area is further displayed on the screen of the monitor,
On the monitor screen, for each of a plurality of area blocks superimposed and displayed in advance on the image of the monitoring area, at least one of a reporting frequency and a detection level by detection of at least one of a sensor and a camera in the area block is displayed. It has a notification information display circuit,
The sensitivity adjustment control unit adjusts the sensitivity of the sensor and the camera in advance so as not to issue a report in the designated time zone based on the report information display in the area block, and prevents false reports. Intrusion detection device with function.   The intrusion detection device with a false alarm reduction function according to any one of claims 1 to 6, further comprising a detection condition setting unit for setting the specified time zone.

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