JPS6316785A - On-vehicle supervisory equipment - Google Patents

Abstract

PURPOSE:To obtain plural still pictures before happening an accident and to provide facilities for clearing the cause up by sequentially and circulatingly recording the image pickup information which is obtained by a video camera installed in an automobile every prescribed period during a drive in plural semiconductor storage devices. CONSTITUTION:From the time when an engine action is detected in an engine action detection part 6 to the time when the engine stops or from the time when the engine action is detected to the time when a shock is given to a bumper 5 and the occurrence of the accident is detected by a pressure detection part 4, a control part 3 transmits a picture storage indication signal every prescribed period to the semiconductor storage device 2. When the semiconductor storage device 2 receives the first picture record indication signal, it records one field of the picture information at that time in a memory 2a at address one of the semiconductor storage device 2 and when the device 2 receives the second picture record indication signal, it records one field of the picture information in that case in a memory 2b at address two. In the same way, the picture information is recorded in a memory 2h at address eight, and after that, back to the memory 2a at address one again, picture recording is circulatingly executed while the picture record instruction signals are received.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an on-vehicle monitoring device that records the state of a vehicle before an accident as a plurality of still images.

2. Description of the Related Art Conventionally, image information captured by a video camera is recorded by a recording device such as a video tape recorder for later examination and confirmation.

Generally, during the scene inspection after a traffic accident, the testimony of the parties involved,
The degree of damage to the car and the skid marks on the tires alone are insufficient.
This may not lead to prompt and appropriate determination of the cause of the accident.

For example, recording information captured by a video camera attached to a car while the car is running is convenient for quickly and appropriately investigating the cause of a traffic accident when it occurs.

Problems to be Solved by the Invention For this purpose, it is sufficient to record the output of the video camera on a video tape recorder as in the past, but since the device is constantly in use while the car is running, the recording video head and tape recorder are There is severe wear and tear, and the device itself is difficult to handle.

To solve this problem, a semiconductor memory device (RAM) may be used as the storage device, but the amount of information stored therein is much smaller than that of a video tape recorder.

The present invention is directed to this small capacity semiconductor memory device (RAM).
The aim is to use the information effectively.

Means for Solving the Problems In order to solve the above-mentioned problems, the in-vehicle monitoring device of the present invention stores image information captured at predetermined time intervals during driving by a video camera mounted on a car in a plurality of semiconductor memories. The apparatus is characterized in that the recording is sequentially circulated and recorded, and when an automobile accident occurs, the recording operation is stopped, and a plurality of still images before the accident are recorded in the semiconductor storage device.

Operation According to the above configuration, the device itself is not large-scale.
By repeatedly recording images at regular intervals and stopping the recording operation when a car accident occurs, a small-capacity semiconductor storage device can be used effectively.

Embodiment Hereinafter, one embodiment of the vehicle-mounted monitoring device of the present invention will be described with reference to the drawings.

In FIG. 1, numeral 1 is a video camera that is attached to a car and takes an image of the front of the car; 2 is a semiconductor storage device consisting of memories 2.a to 2h at multiple addresses 1 to 8, as shown in FIG. , 3 is a control unit that controls the semiconductor device 2; 4 is a pressure detection unit that detects the presence or absence of impact on the bumper 6;
6 is an engine operation detection section that detects the driving state of the engine.

Next, this memory operation will be explained.

Now, in a state where no image is stored in the semiconductor storage device 2, the engine operation detection section 6 records the impact on the bumper 6 from the time engine operation is detected until the engine stops, or from the time the engine operation is detected until the engine stops. In addition, the control unit 3 sends an image storage instruction signal to the semiconductor storage device 2 for a certain period of time (until the pressure detection unit 4 detects the occurrence of an accident).
For example, every 0.5 seconds). Next, the semiconductor memory device 2
When it receives the first image recording instruction signal, it records one field of image information from the video camera 1 at that time in the memo IJ-2a at address 1 of the semiconductor storage device 2, and receives the second image recording instruction signal. 1 field of image information at that time is recorded in the memo IJ-2b at address 2. In the same way, when the recording is completed in memory 2h at address 8, 1
The address memo IJ-2a is returned to, and image recording continues as long as the image recording instruction signal is received.

With this configuration, it is possible to always record eight still images taken before the occurrence of a car accident, and the small-capacity semiconductor storage device 2 can be used effectively.

Effects of the Invention As described above, the in-vehicle monitoring device of the present invention sequentially circulates the imaged information of a video camera at regular intervals and records it in a semiconductor storage device, and stops the recording operation when a car accident occurs. Therefore, it is possible to always record a plurality of still images before an accident, which is convenient for quickly and appropriately investigating the cause of an accident, and is extremely advantageous in practice.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a vehicle-mounted monitoring device according to an embodiment of the present invention, and FIG. 2 is a block diagram of main parts of the monitoring device. DESCRIPTION OF SYMBOLS 1... Video camera, 2... Semiconductor storage device, 3... Control section, 4... Pressure detection section, 5... Bumper , 6... Engine operation detection section.

Claims (1)

[Claims] Sequentially and cyclically storing imaging information of a video camera attached to a car at predetermined time intervals in a plurality of semiconductor storage devices, and stopping the storage operation when a car accident occurs,
An in-vehicle monitoring device characterized in that a plurality of still images taken before an accident are recorded in the semiconductor storage device.