The emergence of in-vehicle hard disk video recorders has solved the confusion of some departments. It is a dedicated embedded digital hard disk video recorder installed on mobile vehicles that can integrate digital recording, monitoring, entertainment, advertising and other functions. The camera can be monitored during the whole process of the vehicle. The captured video images are stored in the recorder. Once an accident or accident occurs, the information in the car DVR can be exported for retrieval and viewing. Speaking of car DVR application cases, the most painful and memorable one is May 29, 2012. 'The most beautiful driver' Wu Bin was hit by a metal block through the front windshield of the long-distance bus, causing serious injury and death. In the car monitoring in the, it recorded a short and shocking picture, which can clearly see the iron sheet smashing the windshield and hit the driver. The monitoring picture shows the good clarity of the video.
With the increase of social recognition, various requirements at different levels have also emerged. The vehicle-mounted DVR function is constantly being improved, the scope of application will be wider and wider, and the role will be greater and greater. In long-distance buses, buses, trains , Ships, ambulances and other vehicles have a wide range of applications.
Can not be ignored is that the working location of the vehicle-mounted DVR is in a moving vehicle, which is incomparable when working in an indoor DVR. The environment here is worse and more difficult to predict. The environmental interference is relatively large. The power source it uses is the battery in the car. As the vehicle is running, there will be braking, climbing, ignition and aging of the vehicle's electrical equipment. This will cause the output voltage of the vehicle to fluctuate with different amplitudes. The control of electromagnetic and voltage is difficult to be perfect.
The hardest component in the car digital hard disk recorder is the hard disk. The bumpy vehicle brings some difficulty to the shock resistance of the hard disk. The spring and rubber pads are used as shockproof materials on the market, although they can play in the vertical force direction. It has a certain anti-vibration effect, but in fact, the vibration direction is irregular under driving conditions, especially under severe road conditions, and the protection of the hard disk is even more difficult to control. In recent years, there have also appeared on-board surveillance recorders using large-capacity USB storage devices.