JPH07200953A - Monitoring device for watch - Google Patents

Abstract

PURPOSE:To reduce the consumption of a video tape and to perform the recording/reproduction of monitoring data with sharp video by using an infrared pyroelectric sensor. CONSTITUTION:A monitor camera 1 as a photographing part is installed at a monitoring place by making a field range match with a monitoring area, and the monitoring object 2 intruding to the field range is fetched as the monitoring data, and it is outputted to a monitor 6 and a recording part 7 in a monitoring room R. The infrared pyroelectric sensor 3 detects the transient change of temperature in the monitoring area generated by the intrusion of the object. and outputs an abnormality signal representing the intrusion of the object 2 to the recording part 7. The recording part 7 is started up setting the signal as input, and a video signal is recorded. Since no transient change of temperature occurs when the object ceases, a ceasing object 2 can be detected by scanning the monitoring area by the infrared pyroelectric sensor 3, or making infrared rays incident on the infrared pyroelectric sensor 3 intermittently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a monitor device for recording only when an abnormality occurs.

[0002]

2. Description of the Related Art Among monitoring and monitoring devices, those for crime prevention are installed not only in department stores and supermarkets but also in places where unspecified large numbers of people come and go, such as at automated teller machine corners of banks. It is also installed in important facilities such as machines and various control rooms to detect intruders.

The video signal obtained from the monitor camera of the monitor and monitor device is usually monitored centrally by a monitor (CRT) provided in the monitor room.

Further, since the main purpose of monitoring is crime prevention, it is necessary to monitor even after the store is closed in the department store, and the monitoring device is normally operated for 24 hours.

It is almost impossible for a small number of people to monitor all of these monitors in a monitor room for 24 hours. Therefore, the video signal from the monitor camera is usually recorded on a video tape. Is played in case of an emergency to help respond.

In reality, however, accidents such as theft are extremely rare, and the effort to reproduce the recording tape to check whether there is any abnormality or consume a large amount of the video tape for recording. The current situation is that costs are incurred by

[0007]

[Problems to be Solved by the Invention]

[0008] In order to avoid a large consumption of recording tape, video tape frames are dropped (8 frames per second) to reduce the consumption. However, there is a problem in that a video signal recorded by dropping a frame of a video tape has a low definition and cannot provide accurate monitoring data.

It is an object of the present invention to provide a monitoring monitor device which uses an infrared pyroelectric sensor to reduce the consumption of a video tape and record and reproduce monitoring data with a clear image.

[0010]

In order to achieve the above object, a monitoring monitor device according to the present invention has an imaging section, an infrared pyroelectric sensor, and a recording section, and monitors only when an abnormality occurs. In the device, the image pickup unit picks up an image of an object to be monitored that has entered the surveillance area and outputs the video signal to the recording unit, and the infrared pyroelectric sensor is generated along with the entry of the object. It detects a transient temperature change and outputs an abnormal signal indicating that an object has entered into the recording unit.The recording unit is activated by the abnormal signal from the infrared pyroelectric sensor as an input and The video signal of is recorded.

Further, the image pickup unit scans the monitoring area at a constant cycle to capture an image, and the infrared pyroelectric sensor is integrally incorporated in the image pickup unit and monitors in conjunction with the scanning operation of the image pickup unit. It scans the area.

Further, the image pickup section is installed by fixing the field of view to the monitoring area and fixed, and has a sensor scanning section, and the sensor scanning section is an infrared pyroelectric sensor for a fixed period of the monitoring area. To scan with.

The image pickup unit is installed by fixing the visual field range to the monitoring area, and the infrared pyroelectric sensor is installed by fixing the visual field range to the monitoring area. And has an optical chopper portion, and the optical chopper portion interrupts the infrared rays incident on the infrared pyroelectric sensor.

[0014]

When the image pickup section is fixed, the infrared pyroelectric sensor scans the monitoring area, or the infrared incident on the infrared pyroelectric sensor is interrupted. When the imaging unit scans the monitoring area, the infrared pyroelectric sensor is used to scan the monitoring area integrally with the imaging unit. As a result, the infrared pyroelectric sensor is constantly operated regardless of whether or not there is a transient temperature change, and the object that has entered the monitoring area is detected.

[0015]

Embodiments of the present invention will be described below with reference to the drawings.
In FIG. 1, a monitor camera 1 serving as an image pickup unit is installed by fixing a field of view to a monitoring area and fixing it at a monitoring place, and a monitoring target 2 that has entered within the range of the fixed viewing angle. Is taken in as monitoring data and is output to the monitor (CRT) 6 and recording section 7 in the monitor room R.

The infrared pyroelectric sensor 3 detects a transient temperature change in the monitoring area caused by the intrusion of the target object and outputs an abnormal signal indicating that the target object 2 has intruded to the recording unit 7. Is. The recording unit 7 is activated by receiving a signal from the infrared pyroelectric sensor 3 and records a video signal from the monitor camera 1. The image recorded on the video tape by the recording unit 7 is played back in case of an emergency so as to be useful for dealing with it.

The sensor scanning unit 4 scans the monitoring area at a constant cycle by the infrared pyroelectric sensor 3 whose viewing angle Θ is narrowed by a Fresnel lens or the like. The sensor scanning unit 4 shown in FIG. Light-receiving surface 3a of sensor 3
A rotation support portion 4a that rotatably supports the infrared pyroelectric sensor 3 with the vertical axis VL as the center of rotation with the vertical axis VL facing toward
The rotating support part 4a is rotated to include a scanning part 4b for scanning the monitoring area by the light receiving surface 3a of the infrared pyroelectric sensor 3.

The optical chopper section 5 shown in FIGS. 2 (a) and 2 (b) interrupts the infrared rays incident on the infrared pyroelectric sensor 3. In this case, the sensor 3 is fixedly installed so that its visual field range matches the monitoring area. The optical chopper unit 5 includes a disc-shaped chopper plate 5a on the front surface of the light receiving surface 3a of the infrared pyroelectric sensor 3. Chopper board 5
Reference numeral a denotes a unit that rotates about the horizontal axis HL as a center of rotation, and extends along the circumferential direction of the chopper plate 5a. The shielding unit 5b covers the light receiving surface 3a of the infrared pyroelectric sensor 3 and the opening that opens the light receiving surface 3a. The portions 5c are provided radially and alternately. The chopper plate 5a is rotated by the scanning unit 5d, and the infrared pyroelectric sensor 3 is rotated by the shielding unit 5b and the opening 5c.
Infrared rays incident on the light receiving surface 3a are interrupted. As the chopper plate, a shield plate 5b is radially formed at a constant pitch on a disk-shaped glass plate using a method such as aluminum vapor deposition, and a transparent glass plate between the shield parts 5b and 5b is formed on the shield plate 5b. The plate surface may be used as the opening 5c.

In the embodiment, the monitor camera 1 captures an image in the surveillance area, and the captured image is displayed on the monitor 6 and the recording unit 7.
And output to. On the other hand, unless the object 2 enters the surveillance area, the infrared pyroelectric sensor 3 does not output a signal, so that the recording unit 7 remains stopped, so that the video signal from the monitor camera 1 is not transmitted. It is not recorded in the recording unit 7. Therefore, the video tape is not wasted.

When the object 2 enters the monitored area, the infrared pyroelectric sensor 3 enters the infrared pyroelectric sensor 3 because the ambient temperature in the monitored area including the object 2 changes transiently. The object 2 that has come back is detected based on a transient temperature change, and a detection signal indicating that the object 2 has entered is recorded in the recording unit 7.
Output to.

The recording unit 7 receives a signal from the infrared pyroelectric sensor 3 as an input, is activated based on this input signal, and records and records a video signal from the monitor camera 1 on a video tape. In the monitor room R, the video signal from the monitor camera 1 is displayed on the monitor 6 to take appropriate measures against the intrusion of the object 2 into the surveillance area.

When the object 2 that once enters the monitoring area is stationary, the infrared pyroelectric sensor 3 loses its output signal because the ambient temperature in the monitoring area does not change transiently. In spite of the presence of the target object 2 to be monitored, the recording unit 7 is stopped from being activated, and it becomes impossible to record the image.

However, according to the present invention, the infrared pyroelectric sensor 3 scans the monitoring area, or the infrared incident on the infrared pyroelectric sensor 3 is interrupted to detect the stationary object 2 by the infrared pyroelectric sensor 3. Let When the infrared pyroelectric sensor 3 detects a stationary object, the recording unit 7 is activated in response to the signal, and the image of the stationary object captured by the camera 1 is recorded on the video tape. This makes it possible to take appropriate measures against this situation while monitoring the stationary object 2 on the monitor 6. Note that an alarm sound may be emitted based on a signal from the infrared pyroelectric sensor 3 to notify that the target object 2 has entered the monitoring area.

In the above embodiment, the monitor camera 1 was used with the visual field direction fixed in a specific direction. However, as shown in FIG. 3, the monitor camera 1 rotates about the vertical axis VL. If the structure is such that the monitoring area is scanned at regular intervals to capture monitoring data, the light receiving surface 3a of the infrared pyroelectric sensor 3 is directed toward the front direction of the field of view of the monitor camera 1, and the infrared pyroelectric sensor 3 Is integrated into the monitor camera 1, and the infrared pyroelectric sensor 3 scans the monitored area in conjunction with the monitor camera 1 for scanning.
You may make it detect a target object.

[0025]

As described above, according to the present invention, a stationary object is detected by an infrared pyroelectric sensor when the object to be monitored has entered the monitoring area and the object is stationary. Therefore, not only a dynamic object that has entered the surveillance area but also a static object can be monitored by capturing a video signal as surveillance data.

Furthermore, when an object enters the surveillance area,
And, in order to record the image by activating the recording unit discontinuously like the case where the object in the surveillance area is stationary for the set time.
As compared with the conventional case where the 24-hour recording unit is continuously activated and recorded, the consumption of the video tape used for recording the video signal can be significantly reduced.

Further, in order to reduce the consumption of the video tape, it is not necessary to drop the video tape frame, and the image displayed on the monitor camera can be recorded as it is. Therefore, the sharpness of the recorded image can be reduced. Has a high effect that accurate monitoring data can be obtained.

[Brief description of drawings]

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

2A is a configuration diagram showing an optical chopper portion used in the present invention, and FIG. 2B is a front view showing a chopper plate.

FIG. 3 is a configuration diagram showing an embodiment in which the present invention is installed in a monitor camera that swings.

[Explanation of symbols]

 1 Monitor Camera 2 Object 3 Infrared Pyroelectric Sensor 4 Sensor Scan Section 5 Optical Chopper Section 6 Monitor 7 Recording Section R Monitor Room

Claims (4)

[Claims] 1. A monitoring monitor device having an image pickup section, an infrared pyroelectric sensor, and a recording section, and recording only when an abnormality occurs, wherein the image pickup section detects an object to be inspected that has entered the surveillance area. It captures an image and outputs the video signal to the recording unit.The infrared pyroelectric sensor detects a transient temperature change caused by the intrusion of the target object and outputs an abnormal signal indicating that the target object has entered. A monitoring monitor device, which outputs to a recording unit, and which is activated by an abnormal signal from an infrared pyroelectric sensor as an input and records a video signal from an imaging unit. 2. The image pickup unit scans a monitoring area at a constant cycle to capture an image, and the infrared pyroelectric sensor is integrally incorporated in the image pickup unit and monitors in conjunction with a scanning operation of the image pickup unit. The monitoring device according to claim 1, wherein the area is scanned. 3. The image pickup unit is installed by fixing the field of view in conformity with the monitoring area, and has a sensor scanning unit, and the sensor scanning unit uses an infrared pyroelectric sensor to periodically monitor the monitoring area. The monitoring device according to claim 1, wherein the monitoring monitor device is a device for scanning. 4. The image pickup unit is installed by fixing the visual field range to the surveillance area, and the infrared pyroelectric sensor is installed by fixing the visual field range to the surveillance area. The monitoring monitor device according to claim 1, further comprising an optical chopper portion, wherein the optical chopper portion interrupts infrared rays incident on the infrared pyroelectric sensor.