Working Principle and Application Case of Car Digital DVR
1. The application scope of the car hard disk recorder
In the current transportation industry, companies often suffer economic losses and reputation losses due to poor supervision. For example, the contradictions and disputes between passengers and passengers occur from time to time; the service awareness of the passengers and passengers is not strong and improper, which directly affects the company's image; the passengers and passengers cross the station to carry passengers, collect money and collect money Do not give tickets and other acts to greatly reduce corporate income. Installing the vehicle-mounted closed-circuit monitoring video system can effectively monitor the situation in the vehicle (staff and passengers and passengers), effectively control the behavior of embezzlement of public funds, and can check whether the driver violates regulations and illegal operations. It can effectively improve service quality, increase economic benefits, enhance the competitiveness of road transportation, and create a brand enterprise with high management level and service quality.
The emergence of vicious incidents of vehicle public safety will seriously affect people's choice of bus routes. In particular, long-distance buses have a long travel time, a long distance, and a large number of people on and off. Criminal behaviors occur from time to time. Vicious incidents such as theft, robbery, and hand-driving of cars and gangsters on the way have a great impact. Criminals are rushing to commit crimes. It is not easy to find evidence. Persuasive evidence handling and mediation are quite tricky. The installation of on-board closed-circuit surveillance video recording system can deter the occurrence of wrongdoing and ensure the safety of the personal and property of the passengers and passengers. The video data can be used as evidence for criminals to assist investigations.
Specific applications are:
Bus, long-distance bus
Ticket monitoring during driving, behavior monitoring of driver and passengers;
In the event of passenger injury, theft, robbery and other accidents, audiovisual evidence shall be preserved;
Proof of audiovisual materials after traffic accidents.
police car
The video recording of the police officer's work on duty is convenient for later analysis and proof;
Video recording of personnel, vehicles, etc. at the crime scene.
Logistics vehicle
Video monitoring of cargo loading, transportation and unloading process, anti-theft;
Banknote car, fire truck, ambulance
Security monitoring, duty monitoring.
School bus, taxi, private car
Proof of insurance claims, anti-theft, anti-robbing.
Working Principle and Application Case of Car Digital DVR
2. Working Principle of Car DVR
Liyan Car DVR adopts an embedded operating system, its system is perfectly combined with the operating system of the hard disk recorder, and it directly calls the hardware, which speeds up the response time, improves the running speed, and reduces unnecessary extra functions.
All parts of the Liyan vehicle DVR are integrated on the motherboard, which is different from ordinary security surveillance video recorders. It has good adaptability to harsh environments such as low frequency vibration and dust.
Liyan Car DVR is highly anti-virus. Due to the use of professional software and hardware, the data stored in the chip is read-only and cannot be written, and the software has very few additional functions, so viruses cannot invade.
To be a stable car DVR, in addition to a stable operating system, the following problems must be solved:
1. Stable wide voltage, the voltage on the car is unstable, the fuel gate, battery aging and other operations will affect the voltage fluctuation on the car, the lowest can reach 6V, the highest can reach 70V. Vehicle-mounted DVRs that do not have super-wide voltages cannot work normally in the car, often crashing, not recording, and severely burning the motherboard, power board, camera and even other equipment on the car. Liyan Car DVR has done a lot of work on power supply processing, the machine can work normally from 7V to 40V, and has a stable 12V / 4A voltage output for cameras and car displays. We promise that the voltage of 6V to 70V will not cause any impact on our machine, welcome to test, we are responsible for any problems.
Professional anti-vibration treatment, mainly low-frequency vibration on the car, most cars are mainly 20HZ-40HZ vibration,
If the anti-shock treatment is not good, it will cause problems such as crashing, restarting, hard disk not working, and losing video clips. Liyan Car DVR has done a very professional treatment on shockproof, mainly from two aspects: First, on the hardware, the hard disk and the shockproof silicone pad of the whole machine are designed by themselves, with anti-low frequency vibration, and the circuit board is welded with Plug wires, all wire connectors are locked. The second is the software. The independently developed software for vehicle-mounted DVR has the MPFS (Multiple Protection File System) file system and high error correction function for data.
Suitable for the machine structure on the car, the environment on the car is harsh, heat dissipation, dustproof, waterproof, anti-folding and anti-pressure are necessary
Questions to consider. Car washing may allow water to enter other equipment on the car. Drivers, conductors, passengers and other personnel may damage the machine by breaking, smashing, pressing, etc., the recorder will generate a lot of heat, and a lot of dust on the car will affect these problems. The normal operation of the car DVR, if any of these problems are not handled and resolved well, it will be an unqualified car DVR. Liyan Car DVR has designed a car DVR case according to the actual situation on the car. The case is made of sturdy steel plate. After locking, there is no removable thread on the outside. The front and rear are shutters for ventilation, heat dissipation and waterproofing. The internal car DVR shell is made of aluminum. The whole machine adopts vortex type vents to play the chimney pipe effect, and the aluminum plate is attached to the main board to prevent dust and heat.
4. Convenient management. A large number of vehicles and a large amount of video data for each vehicle. If it is not convenient and fast to find and read, it will cause users to need a lot of personnel and time to manage. The video files of Liyan Car DVR are compatible with FAT32 format, and the data can be read directly on the computer through the hard disk reader. The file name of the video data is named after the date and time plus the license plate number. The license plate number, time, GPS information and Date, support CF card recording and data copying.
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