JPH06792Y2 - Object detection device with built-in camera - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an object detection device such as a crime prevention detector for detecting an intruder, and particularly to a place where highly reliable object detection is performed. The present invention relates to an object detection device used in.

[Conventional technology]

Various conventional object detection devices have been put to practical use even when limited to crime prevention, and their detection principles are various.
For example, an infrared detector that outputs a detection signal when the near-infrared ray is cut off and a projector that emits near-infrared ray and a light-receiver that constantly receives this near-infrared ray are installed facing each other, and far-infrared energy emitted by an object. Passive infrared detectors and the like are often used to detect the change and detect the change. In addition, there are those using ultrasonic waves and those using microwaves. Since these detection devices basically only output a detection signal when an object (intruder) enters the detectable range, the reason why the detection signal is output is really the intruder. It was impossible to determine whether it was caused by the above, or whether the detection device itself was malfunctioning due to the influence of other noise or the like.
Taking an infrared detection device for crime prevention installed outdoors, for example, the detection signal is emitted when the intruder passes, leaves that have been blown by birds or the wind, or paper fragments. There are various cases such as when the near infrared ray is cut off. Although it can be said that the detection operation of objects other than these intruders is normal in view of the basic operation of the infrared detection device, it is actually judged as a mere malfunction, and it is desired to clarify the cause of the detection operation. It was In order to make up for the deficiencies of these detection devices, a TV camera installed near the detection device, a dedicated cable for transmitting video signals, and a video playback monitor are used to display the video when the detection signal is issued. The method of checking at a remote place was taken.

[Problems to be solved by the invention]

Since the state when the detection signal was output cannot be confirmed only with the conventional detection device, a TV camera and a monitor were added for the purpose of compensating this point, but both the equipment cost and the construction cost were high. However, there was a problem that its operation method became complicated.

[Means for solving problems]

In addition to the object detection function, a television camera and an image storage unit are provided so that an image when an object detection signal is issued can be stored and the cause of the detection signal can be known.

[Action]

The basic function of detecting an object is the same as the conventional one, but the state of the area to be monitored by the detection device is simultaneously monitored by the TV camera built in the detection device,
The image at the moment when the detection signal is issued is input to the storage unit.
This memory stores several pieces of image information so that you can later play back this information on a monitor or print it out to find out what caused the detection operation. To The stored image information is
If you can transmit it to another place online as needed,
There is no need to go to the detection device to check.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention. The detector 11 converts a fluctuation amount when an object is detected into an electric signal, amplifies it with the amplifier 12, judges by the judgment unit 13 whether or not it is at a predetermined level, and outputs it as a detection signal from the detection signal output unit 14. . At the same time, the output from the determination unit 13 is sent to the control unit 23, and the television camera follows the command from this control unit.
The video from 21 is stored in the image storage unit 22. The image storage unit 22 is a digital signal that can be stored in an IC memory or the like for several frames, and can be repeatedly stored and erased as many times as desired. The image output unit 24 connected to the image storage unit 22 processes the stored image into a signal for reproducing on a monitor or a signal for transmitting a still image to another place by a two-wire cable. Perform various signal conversions.

For example, it is assumed that a bird has arrived within the detectable range of the infrared type detection device having the configuration as in this embodiment. In this case, when the bird is detected by the detector, a detection signal is output and one image is automatically stored in the image storage unit. By extracting this image information from the image output unit 24 and reproducing it, the presence of a bird is confirmed, and it is found that the detection signal at this time is an operation due to a cause other than an intruder and not due to a malfunction of the detection device itself. To do. If it is known that the detection operation by such a bird occurs many times with the same detection device, it is possible to take measures considering the installation method etc. from the detection method of that detection device, and the detection device most suitable for that place Can be dealt with promptly so that can be installed in the optimal condition.

[Effect of device]

According to the present invention, since it is possible to confirm the image at the moment when the detection device issues the object detection signal, it is possible to perform detection with higher reliability than before. In addition, it becomes possible to check the status when detecting without installing a detection device and another TV camera system as in the past.
It is possible to significantly reduce the equipment cost. Further, when transmitting an image from the detector to another place, it is possible to transmit the information as a still image instead of transmitting the video signal as it is, so that the construction cost of wiring or the like can be reduced. Also,
By integrating the TV camera and the detection device, the number of devices to be installed does not increase, so that the appearance is not spoiled.

As described above, according to the object detection device with a built-in camera of the present invention, the detection performance can be enhanced at the minimum cost, and a great effect can be exerted in improving the reliability of this type of detection device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a detection device according to an embodiment of the present invention. 11 ... Detector, 12 ... Amplifier, 13 ... Judgment unit, 14 ... Detection signal output unit, 21 ... TV camera, 22 ... Image storage unit, 23 ... Control unit, 24 ... Image output unit,

Claims (1)

[Scope of utility model registration request] 1. A detector for converting a fluctuation amount when an object is detected into an electric signal, an amplifying section, and determining whether or not a signal from the amplifying section is at a predetermined level and outputting a signal from a detection signal output section. At the same time, a determination unit that sends a signal to the control unit, a television camera controlled by the control unit, an image storage unit,
An image output unit is provided, and when an object is detected, the image information is stored according to a command from the control unit based on the output from the detection unit, and this image information can be taken out when necessary. An object detection device with a built-in camera.