Expert's Eye of Fire and Golden Eye to Identify Vehicle DVR
Jan 10, 2019

I believe that everyone has a certain understanding of the car DVR, then some of its insider you know? How to choose and identify? Now let's take a closer look at how to identify a qualified and practical vehicle DVR.

The biggest difference between ordinary DVR and vehicle DVR is the difference in voltage and seismic capability. Because of the vibration of vehicles and the instability of battery power supply, the seismic resistance and power supply adaptability of vehicle-mounted DVR are obviously stronger than that of ordinary DVR. Therefore, people should pay more attention to the anti-seismic force and power supply of DVR equipment.

Requirements for Seismic Capability

First of all, let's talk about the earthquake resistance. Previous articles have mentioned this. If the vibration of DVR fuselage is too strong, it may cause dislocation or even damage of hard disk head. So, the solution to DVR vibration problem is to strengthen the protection of hard disk. Because the current hard disks are basically mechanical spindle hard disks, and the magnetic head and the storage disk face are only a few microns, so if there is a slight vibration will cause contact between the two. Friends familiar with computers know that the speed of electrical products is basically more than 5,000 times per minute. If the head contacts the disk at such a high speed, the scrap of the head is only a blink of an eye. Therefore, perfect anti-seismic measures are the fundamental to ensure the life of the machine. At present, many equipments adopt suspension shock absorber design. Compared with the passive protection technology such as spring and rubber pad, it has better effect to avoid contacting it from the source.

Requirements for Power Balance

After that, let's take a look at the current control of the DVR. For the circuit protection of VHDR, the first thing to do is to refine the dynamic voltage and current. Stable voltage plays an important role in the normal operation of equipment. In theory, in the case of constant power, the balance of voltage and current can ensure that the power is not affected. However, since the transmission of vehicle current is basically in the process of change, the voltage is also in an unstable state. This requires the introduction of a strong anti-electromagnetic interference design, at least able to withstand more than 100 shocks per hour, only in this way can the machine more comfortably respond to the changing voltage, thus ensuring the healthy work of the machine.

Error Correction Design of the System

In addition to the characteristics of the above two DVRs, there is a common problem that most IT products are facing, which should not be ignored. That is the error correction design of the system. For embedded operating systems, if we want to achieve perfect error correction function, it is undoubtedly only a good idea. Although the biggest advantage of embedded system is that it can make the system run more stable and efficient, it also puts forward higher requirements for the design of the system. So in terms of current conditions, the hard disk error correction of embedded system is mainly the control of reading and writing ability. For consumers, to purchase from a well-established manufacturer or sales channel with good reputation may add more quality assurance. For the maintenance of system stability, as a general consumer, I am afraid that our grasp of the equipment is limited to this.

The above mentioned aspects are basically the obvious differences between vehicle-mounted DVR and ordinary DVR, so they are also the aspects that need the most attention in technology. However, objectively speaking, due to the current technical characteristics of on-board monitoring, there is still a certain distance from the overall civil demand. Therefore, it may be the most qualified product to have a good grasp of their own needs and to match the safety schemes of vehicles.

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