Car DVR intelligent and networked applications
Richmor
Richmor.net
2018-03-01 10:35:20
In the past two years, various kinds of car DVRs (car DVRs) have appeared on the market. As the traditional embedded DVR market segments, car DVRs also welcome many security companies. Car DVR inherits the development trend of networked and intelligent technology of ordinary embedded hard disk video recorders. In addition, the products of car DVR should have GPS satellite positioning function and other functions that conform to the customization of the transportation industry.
City bus: can occur within a few weeks in the compartment record, such as stealing, brawl and with the crew took an argument, looking for redemption disputes, but also can contact the bus advertising company to broadcast the contents of this city advertising content.
Long-distance bus: to monitor the car fraud. Passengers stationed passengers, private money and other acts of embezzlement of public funds to form effective control of the transport companies to improve efficiency, enhance the quality of service and awareness have an excellent promotion, but also for the traffic police for the half-way overload and other acts have More intuitive evidence.
But for the car DVR, the first thing to do is to narrow the dynamic voltage and current refinement. How to ensure the normal operation of the car DVR, a stable voltage and current is very important, but on the other hand, the input power of the device is fixed by the W = U * I shows that the voltage changes when the current is changing, the voltage The direction of current change is always the opposite. So if the starting voltage is lower, the relative starting current will increase. Macro is so simple, but can do this function and to ensure the normal operation of equipment, which may need some effort, the first is to protect the circuit design, to know the car DVR power supply within 1 hour to After hundreds of shocks to protect the circuit to do poorly, ranging from the power board damage, heavy direct breakdown of the power board burned motherboard.
Earthquake-resistant design: Vehicle-mounted DVR seismic design is very important, to put it plainly is how to protect the hard drive. Because the current hard disk drives are mechanical hinge, head and disk distance of only a few microns, if the naked eye, the head is attached to the disk, but even if you do not understand the hard disk you should understand that the 5400 Turn the hard disk to rotate at least 90 times per second, if the head is attached to the top, and soon after, the head was worn out. Such a near distance, if the earthquake is not doing well, as long as the head read and then there is a little bit of vibration, ranging from hard disk bad sectors, heavy read head crash (hard terms). So hardware seismic is very important.
Fault Tolerant Error Correction Design: The ability of a drive to tolerate errors and errors is a challenge that has been strived to solve since the hard drive was in the IT hardware or software industry. For an embedded system, want to do a perfect fault-tolerant error correction design, very difficult. But for the design of embedded systems, embedded systems are originally designed for the pursuit of better stability and execution speed. However, one of the problems that can not be ignored is the poor portability that makes it impossible to design Big change. So its first design idea is very important. Embedded systems for hard disk error correction, the current effective way is to read and write control. Car DVR network applications
Earthquake-resistant design: Vehicle-mounted DVR seismic design is very important, to put it plainly is how to protect the hard drive. Because the current hard disk drives are mechanical hinge, head and disk distance of only a few microns, if the naked eye, the head is attached to the disk, but even if you do not understand the hard disk you should understand that the 5400 Turn the hard disk to rotate at least 90 times per second, if the head is attached to the top, and soon after, the head was worn out. Such a near distance, if the earthquake is not doing well, as long as the head read and then there is a little bit of vibration, ranging from hard disk bad sectors, heavy read head crash (hard terms). So hardware seismic is very important.
Fault Tolerant Error Correction Design: The ability of a drive to tolerate errors and errors is a challenge that has been strived to solve since the hard drive was in the IT hardware or software industry. For an embedded system, want to do a perfect fault-tolerant error correction design, very difficult. But for the design of embedded systems, embedded systems are originally designed for the pursuit of better stability and execution speed. However, one of the problems that can not be ignored is the poor portability that makes it impossible to design Big change. So its first design idea is very important. Embedded systems for hard disk error correction, the current effective way is to read and write control. Car DVR network applications
City bus: can occur within a few weeks in the compartment record, such as stealing, brawl and with the crew took an argument, looking for redemption disputes, but also can contact the bus advertising company to broadcast the contents of this city advertising content.
Long-distance bus: to monitor the car fraud. Passengers stationed passengers, private money and other acts of embezzlement of public funds to form effective control of the transport companies to improve efficiency, enhance the quality of service and awareness have an excellent promotion, but also for the traffic police for the half-way overload and other acts have More intuitive evidence.
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