The top six purchase criteria for car DVRs
richmor
richmor.net
2018-03-08 10:52:52
Anti vibration
Although car DVR is used as embedded systems as same as common DVR, the vehicle DVR technology is more complex than the ordinary DVR, and the key to be solved is different. Therefore, the two are two completely different concepts. Vehicle DVR applications on mobile vehicles, due to different vehicle conditions and road conditions, cause great impact on the hard disk read and write data, and damage the equipment greatly. Therefore, the seismic technology has become the most basic requirement for the vehicle DVR. At present, the main measures are to reduce the vibration of the whole machine, hard disk rack and the shock absorption of the hard disk.
Regulated power supply
The stability of the voltage is another important technology for the vehicle DVR. Because during the driving process, the vehicle will have the actions of ignition, braking and stepping on the accelerator. These actions will cause the output voltage of the vehicle to fluctuate in different ranges, which will easily cause the car DVR to burn out. Therefore, the vehicle DVR must have a wide voltage input capability to adapt to this voltage change. At present, a wide voltage of 6 to 36V is usually used to meet the demand for mobile vehicles.
At the same time, we should pay attention to that if the vehicle collides suddenly and the power on the vehicle breaks down, at this time, the vehicle DVR must have the function of protecting the power automatically so that the data in the hard disk will not be lost.Battery power DVR can solve this problem easily,Richmor is a Battery power DVR manufacturer in China.
Heat dissipation
Due to the influence of environment and weather, the great variation of temperature in the course of the operation of the vehicle. This is a high requirement for the heat dissipation of the vehicle DVR. Therefore, if the heat dissipation is not good, the life of the product will be reduced and the monitoring effect will be affected. At present, some products are cooled by fans, and some are dissipating through the fuselage. So when you buy it, it's best to run it for a period of time, then measure the temperature of the fuselage, and watch the actual effect of the image.
Image sharpness
The clarity of image directly affects the monitoring effect. Therefore, when buying products, we need to see which processing chips the product adopts and which compression format and resolutions to support. At present, the product support is generally CIF to D1, using D1 video, CIF transmission. To observe the actual effect, it is necessary to record a video at different resolutions to observe the effect of video playback, whether the picture is clear, and whether there is a delay.(FHD DVR video recorder 1080p)
Interface firmness
In the car, because of the brakes, acceleration, road bumps, the larger vibration, If the interface is not strong, the wiring may fall off at any time, causing image jitter, video loss, and power loss. So, when you purchasing, you should be careful to see if the interface is firm. I have seen in the testing process, some manufacturers have gathered most of the interfaces on the back panel, instead of using a multi-pin interface, and bundled all data lines into a bunch, which played a good role in the firmness of the interface.
Wireless transmission
Besides providing local video and forensic data, the vehicle DVR also needs to get the video information back to the control center in time, so that the control center can be conveniently controlled, and the centralized management can be understood in time. Therefore, wireless transmission is particularly important.
At present, we mainly use the mobile GPRS and Unicom's CDMA network, but because of the bandwidth and cost problem, we can not achieve real-time transmission. We can only transmit 5~7 frames in CIF format within one second. Therefore, the user can see whether the transmitted picture is clear and fluent in the control center.Mobile DVR with WIFI have solved this problem well.
Although car DVR is used as embedded systems as same as common DVR, the vehicle DVR technology is more complex than the ordinary DVR, and the key to be solved is different. Therefore, the two are two completely different concepts. Vehicle DVR applications on mobile vehicles, due to different vehicle conditions and road conditions, cause great impact on the hard disk read and write data, and damage the equipment greatly. Therefore, the seismic technology has become the most basic requirement for the vehicle DVR. At present, the main measures are to reduce the vibration of the whole machine, hard disk rack and the shock absorption of the hard disk.
Regulated power supply
The stability of the voltage is another important technology for the vehicle DVR. Because during the driving process, the vehicle will have the actions of ignition, braking and stepping on the accelerator. These actions will cause the output voltage of the vehicle to fluctuate in different ranges, which will easily cause the car DVR to burn out. Therefore, the vehicle DVR must have a wide voltage input capability to adapt to this voltage change. At present, a wide voltage of 6 to 36V is usually used to meet the demand for mobile vehicles.
At the same time, we should pay attention to that if the vehicle collides suddenly and the power on the vehicle breaks down, at this time, the vehicle DVR must have the function of protecting the power automatically so that the data in the hard disk will not be lost.Battery power DVR can solve this problem easily,Richmor is a Battery power DVR manufacturer in China.
Heat dissipation
Due to the influence of environment and weather, the great variation of temperature in the course of the operation of the vehicle. This is a high requirement for the heat dissipation of the vehicle DVR. Therefore, if the heat dissipation is not good, the life of the product will be reduced and the monitoring effect will be affected. At present, some products are cooled by fans, and some are dissipating through the fuselage. So when you buy it, it's best to run it for a period of time, then measure the temperature of the fuselage, and watch the actual effect of the image.
Image sharpness
The clarity of image directly affects the monitoring effect. Therefore, when buying products, we need to see which processing chips the product adopts and which compression format and resolutions to support. At present, the product support is generally CIF to D1, using D1 video, CIF transmission. To observe the actual effect, it is necessary to record a video at different resolutions to observe the effect of video playback, whether the picture is clear, and whether there is a delay.(FHD DVR video recorder 1080p)
Interface firmness
In the car, because of the brakes, acceleration, road bumps, the larger vibration, If the interface is not strong, the wiring may fall off at any time, causing image jitter, video loss, and power loss. So, when you purchasing, you should be careful to see if the interface is firm. I have seen in the testing process, some manufacturers have gathered most of the interfaces on the back panel, instead of using a multi-pin interface, and bundled all data lines into a bunch, which played a good role in the firmness of the interface.
Wireless transmission
Besides providing local video and forensic data, the vehicle DVR also needs to get the video information back to the control center in time, so that the control center can be conveniently controlled, and the centralized management can be understood in time. Therefore, wireless transmission is particularly important.
At present, we mainly use the mobile GPRS and Unicom's CDMA network, but because of the bandwidth and cost problem, we can not achieve real-time transmission. We can only transmit 5~7 frames in CIF format within one second. Therefore, the user can see whether the transmitted picture is clear and fluent in the control center.Mobile DVR with WIFI have solved this problem well.