JP2000006854A - Drive recorder for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely grasp an accident occurring state by recording a picture image and sensor information immediately before an accident and playing back the recorded information at the time when the accident occurs. SOLUTION: Picture image information by a CCD camera 1 and each sensor information of car speed sensor 3-acceleration sensor 6 are simultaneously recorded in a random access memory 12 by control of a control circuit 11. Recorded information of the memory 12 is transferred to a flash memory 13 by actuation of a collision sensor 2, and the image information immediately before an accident is played back by taking it out from an output terminal 15 through an encoder 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive recorder for a vehicle, which makes it possible to accurately grasp the condition of a vehicle immediately before an accident.

[0002]

2. Description of the Related Art In order to enable analysis of the cause of a vehicle accident, a method has been proposed in which a vehicle is provided with various sensors for sensing its speed, steering angle, brake pressure, acceleration, etc., and records the state of the vehicle immediately before the accident. ing.

[0003]

However, in the above-described conventional method, since only a plurality of sensor information are recorded, it is not possible to clearly grasp the situation of the occurrence of the accident, and it is not effective for investigating the cause of the accident. .

An object of the present invention is to record not only sensor information such as a vehicle speed but also image information immediately before an accident at the same time, so that an accident occurrence situation can be accurately grasped and an accident analysis can be smoothly performed. An object of the present invention is to provide a vehicle drive recorder.

[0005]

In order to achieve the above object, a drive recorder for a vehicle according to the present invention includes an image pickup means for photographing a vehicle condition during running, and a vehicle speed, a steering angle, a break pressure, an acceleration and the like during running. Driving information sensing means for sensing the driving information of the above, recording means for simultaneously recording the image information of the imaging means and the driving information, a collision sensor, and storing the recording information of the recording means by operation of the collision sensor upon occurrence of an accident. And recording information storage means for performing the above.

[0006] In the present invention, the imaging means may include a cabin camera for photographing a driving situation in the cabin. Further, in the present invention, the recording information storage means may have a flash memory, and may be configured to prohibit information recording by the recording means by operating the collision sensor and to transfer the latest recording information to the flash memory. Good. In the present invention, the recording means may be configured to erase the oldest information and record the latest information. Further, in the present invention, the image processing apparatus may further include an image compression unit that compresses the image information and records the image information, and an encoder that processes the recording information from the flash memory. Further, in the present invention, the recording means may include a video recorder.

[0007]

FIG. 1 shows an embodiment of a vehicle drive recorder according to the present invention. In the figure, 1 is CC
D camera, 2 is a collision sensor, 3 is a vehicle speed sensor, 4 is a steering angle sensor, 5 is a brake pressure sensor, 6 is an acceleration sensor, and 7 is a signal processing unit. Signal processing unit 7
Is an A / D converter 8, a decoder 9, an image compression circuit 10,
Control circuit (CPU) 11, random access memory (R
AM) 12, flash memory 13, encoder 14,
It comprises a video output terminal 15 and the like.

The CCD camera 1 mainly captures a situation in front of the vehicle when the vehicle is running, converts a video signal as image information into a digital signal by an A / D converter 8 in a signal processing unit 7, and processes the digital signal by a decoder 9. Then, the image is compressed by the image compression circuit 10 and recorded in the random access memory 12.

At the same time, each sensing information from each of the sensors 2 to 6 is controlled by the control circuit 11 and recorded in the random access memory 12 together with the compressed image information. For example, 16 memories 12 are prepared. When the latest information is recorded, the oldest information is erased and the control circuit 11 controls the endlessly and constantly to record the latest information.
In this case, the recording timing can be set in any synchronization.

FIG. 2 shows a configuration example of a memory area of the memory 12, wherein 12a is an image information memory area, and 12b is a sensor information memory area. FIG. 3 shows a configuration of information recorded in the memory 12, and has a recording capacity of, for example, 1 to 32 pages. Each page contains date / time data, vehicle data (sensor information), compressed image data, and the like. Is stored.

Now, when the collision sensor 2 is activated due to the occurrence of an accident, the control circuit 11 instructs the random access memory 12 to prohibit writing and stops recording of each information.
At the same time, the latest record information immediately before the stop is transferred from the memory 12 to the flash memory 13 and recorded, so that even if the power is turned off in the event of an accident, the record information is not erased. In performing the accident analysis, the information recorded in the flash memory 13 is subjected to signal processing such as expansion of compressed image information by the encoder 14, and the image and the sensor information immediately before the accident are reproduced from the video output terminal 15. Can be.

FIG. 4 shows an example of a reproduced image. FIG. 5 is an operation flowchart of the above-described apparatus of the present invention. In FIG. 5, in step S1, an image in front of the vehicle is photographed by the CCD camera 1, and in step S2 the above-described signal processing of the image is performed and recorded in the memory (RAM) 12. Record sensor information such as pressure and acceleration in a memory. In step S4, it is determined whether or not the collision sensor 2 operates. When the collision sensor 2 does not operate, the process returns to step S1, but if it operates, the recording information in the memory 12 is transferred to the flash memory 13 and recorded in step S5. To reproduce the image of the recorded information in the memory 13.

FIG. 6 illustrates the arrangement of the sensors 2 to 6 and the CCD camera 1. In this example, a vehicle interior camera 16 is provided especially in the vehicle interior, and the driving situation of the driver in the driver's seat 17 is also recorded. According to this, it is possible to verify whether there has been an inattentive driving, a drowsy driving, or the like. Note that a video tape recorder may be used instead of the random access memory 12. in this case,
The flash memory 13 is unnecessary.

[0014]

As described above, according to the present invention, by reproducing the image and the sensor information immediately before the accident,
Accident occurrence can be clearly understood, and the cause of the accident can be analyzed smoothly.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a configuration example of a memory area of a random access memory.

FIG. 3 is a diagram showing a configuration example of information recorded in a random access memory.

FIG. 4 is a diagram showing an example of a reproduced image.

FIG. 5 is an operation flowchart of the present invention.

FIG. 6 is a layout diagram of each sensor and a CCD camera.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CCD camera 2 Collision sensor 3 Vehicle speed sensor 4 Steering angle sensor 5 Brake pressure sensor 6 Acceleration sensor 11 Control circuit (CPU) 12 Random access memory 13 Flash memory

Claims (6)

[Claims] 1. An imaging means for photographing a vehicle condition during traveling, a driving information sensing means for sensing driving information such as a vehicle speed, a steering angle, a brake pressure, an acceleration, etc., during traveling, an image information of the imaging means and A drive recorder for a vehicle, comprising: a recording unit that simultaneously records driving information; a collision sensor; and a recording information storage unit that stores the recording information of the recording unit by an operation of the collision sensor when an accident occurs. 2. The drive recorder for a vehicle according to claim 1, wherein said imaging means includes a vehicle interior camera for photographing a driving situation in the vehicle interior. 3. The recording information storage means has a flash memory, and is configured to prohibit information recording by the recording means by operating the collision sensor and to transfer latest recording information to the flash memory. The vehicle drive recorder according to claim 1 or 2, wherein: 4. The vehicular drive recorder according to claim 1, wherein the recording unit is configured to erase the oldest information and record the latest information. 5. The image processing apparatus according to claim 1, further comprising: an image compression unit that compresses and records the image information, and an encoder that processes the recording information from the flash memory. A drive recorder for a vehicle as described in the above. 6. The vehicular drive recorder according to claim 1, wherein said recording means includes a video recorder.