JPH0194787A - Monitoring equipment - Google Patents

Abstract

PURPOSE:To allow a VTR to record a body only when it moves by providing a movement detection circuit detecting the presence or absence of the moving body from the output signal of a camera and recording the output signal of the camera with the aid of the output of this circuit. CONSTITUTION:The output signal of the camera 2 photographing the state of the cashing service corner 1 of a bank or the like is supplied to the movement detection circuit 5. The circuit 5 compares it with the status of one preceding display screen by a memory 6 and a subtraction circuit 7 and detects whether the moving body exists or not. When the moving body exists, it starts the recording operation of the VTR 3 and records the output signal of the camera 2. When the moving body does not exist, it stops the recording operation of the VTR 3. Therefore, the recording operation of the VTR 3 is executed only when the status of the cashing service corner 1 is changed. As the result, the quantity tape used for the VTR can be reduced and the tape can be effectively used.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a monitoring device using a camera.

BACKGROUND OF THE INVENTION FIG. 2 shows a conventional configuration diagram of a monitoring device using a camera installed in a cash service corner of a bank or the like. In the conventional monitoring device shown in FIG. 2, 1 is a cash service corner, 2 is a camera, 3 is a VTR, and 4 is a monitor.

In the above configuration, the state of the cash service corner 1 is photographed by the camera 2, recorded on the VTR 3, and displayed on the monitor 4 to monitor the cash service corner.

Problems to be Solved by the Invention However, in the above configuration, the camera 2 is not connected to the cash service corner 1 regardless of whether there is a person present at the cash service corner 1 or not.
is driven, and the VTR 3 also performs a recording operation. In this case, it is inefficient for the device to operate when no one is present, and in VTR5, the tape is consumed for recording during this time, resulting in a very inefficient system.

In view of this, an object of the present invention is to provide a monitoring device that performs efficient operation by recording only necessary and sufficient information.

Means for Solving the Problems The present invention is a monitoring device that includes a camera, a motion detection circuit that detects the presence or absence of a moving object from the output signal of the camera, and recording means that records the output signal of the camera.

Operation According to the present invention, the recording means performs the recording operation of the output signal of the camera based on the output of the motion detection circuit.

Example Embodiments of the present invention will be described below with reference to the drawings.

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

In FIG. 1, components that operate in the same manner as in the prior art are designated by the same numerals and detailed explanations will be omitted. Reference numeral 6 denotes a motion detection circuit provided for the purpose of the present invention, which is composed of a memory 6 and a subtraction circuit 7.

The operation of the monitoring device having the configuration shown in FIG. 1 will be explained.

Camera 2 to photograph the condition of the cash service corner
The output signal is supplied to the motion detection circuit 6.

The motion detection circuit 6 uses the memory 6 and the subtraction circuit 7 to perform a comparison with the state one screen before, and detects whether there is a moving object. When there is a moving object, record the VTR3,
Record the output signal of camera 2, and when there is no moving object, V
Stop recording operation of TR3. Therefore, the recording operation of the VTRa is performed only when a change occurs in the cache service corner, and the amount of VTR tape can be reduced and used effectively.

FIG. 3 shows a configuration diagram of a motion detection circuit in a second embodiment of the present invention. In FIG. 3, 8 is a comparison circuit that compares the output signal of the subtraction circuit 7 with a predetermined value, and when the signal is larger than the predetermined value, the signal is supplied to the count circuit 9. The counting circuit 9 calculates a motion signal for a predetermined period of time, and when the motion signal is greater than a predetermined value, it sends out a control signal to cause the VTR 3 to record.

Therefore, this motion detection circuit 6 does not send a motion signal when a small object moves or when noise occurs in the camera 2, and can perform motion detection with high accuracy.

FIG. 4 shows a configuration diagram of a third embodiment of the present invention.

In FIG. 4, 1o is a predetermined time holding circuit which, when the motion detection circuit 6 detects movement, sends out a control signal to cause the VTR 3 to perform a recording operation for a predetermined time.

Note that the recording operation of the VTR of the present invention can be used for either real-time recording or intermittent recording.

As described above, according to the present invention, by providing a motion detection circuit and causing the VTR to record only when there is movement, it is possible to reduce the number of VTR tapes.

As described in detail, according to the present invention, efficient operation can be realized, and the amount of tape consumed by a VTR and the storage space thereof can be reduced, and its practical effects are significant.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a monitoring device according to a first embodiment of the present invention, FIG. 2 is a block diagram of a conventional monitoring device, and FIG. 3 is a block diagram of a second embodiment of the motion detection circuit of the present invention. 4 are block diagrams of a monitoring device according to another embodiment of the present invention. 2...Camera, 3...VTR16...
...Motion detection circuit, 6°°°...Memory, 7...
...Subtraction circuit, 8...Comparison circuit, 9...
. . . Count circuit, 10 . . . Predetermined time holding circuit. Name of agent: Patent attorney Toshio Nakao and 1 other person
2 Figure 3 Figure 4

Claims (3)

[Claims] (1) A camera, a motion detection circuit that detects the presence or absence of a moving object from the output signal of the camera, and a recording means that records the output signal of the camera, and the output signal of the motion detection circuit controls the recording operation of the recording device. A monitoring device characterized by: (2) The monitoring device according to claim 1, wherein the motion detection circuit includes a delay circuit and a comparison circuit. (3) The monitoring device according to claim 1, wherein the motion detection circuit maintains the output of a control signal for causing the recording means to perform a recording operation for a predetermined period of time.