Professional car dvr PCB assembly

 Car DVR belongs to the subdivided market of traditional embedded hard disk video recorders. It is a new special product developed with the application of digital video and audio coding technology in vehicles. It uses embedded processor and embedded operating system, combined with the latest H.264 audio and video compression/decompression technology, GPS global positioning technology, 3G wireless communication technology, USB communication technology, advanced vehicle power management technology in the IT field , GIS geographic information technology, suitable for 24-hour monitoring of various types of vehicles. 

It can perform audio and video synchronous recording, global positioning, and wireless audio and video real-time transmission. At the same time, a variety of interfaces are reserved on the host computer, which can be connected with vehicle-mounted equipment such as vehicle-mounted display screens, IC trucks, signal priority control systems, and passenger flow statistics systems. Widely used in mobile vehicles. At this stage, there are three storage methods for vehicle-mounted hard disk video recorders: computer hard disk, U disk, and SD card. In contrast, U disk is more secure. The U disk has no molecular thermal moving elements, and the function loss is small. It can be used in various buses with shaky conditions and difficult switching power supply. 

In this kind of car, the general car-cut hard disk video recorder cannot work normally; the gene expression data information is convenient, the U disk can be directly inserted into the computer USB port, and the video can be played back and stored without the computer hard disk RF interface and USB adapter equipment. The actual operation is simpler; the U disk interface is designed to be inserted continuously, which is more reliable than the SD card. The SD card slot is a slot inside the machine, and it cannot be inserted frequently, otherwise the wear rate will be high. The USB interface is the interface between the machine and the device. It is specially designed for data transfer between machines and equipment. Whether it is household appliances, process performance, or the physical characteristics of sockets, it is suitable for long-term exchange of data information between machines and equipment.

Overview

Car DVR belongs to the subdivided market of traditional embedded hard disk video recorders. It is a new special product developed with the application of digital video and audio coding technology in vehicles. It uses embedded processor and embedded operating system, combined with the latest H.264 audio and video compression/decompression technology, GPS global positioning technology, 3G wireless communication technology, USB communication technology, advanced vehicle power management technology in the IT field , GIS geographic information technology, suitable for 24-hour monitoring of various types of vehicles. It can perform audio and video synchronous recording, global positioning, and wireless audio and video real-time transmission. At the same time, a variety of interfaces are reserved on the host computer, which can be connected with vehicle-mounted equipment such as vehicle-mounted display screens, IC trucks, signal priority control systems, and passenger flow statistics systems. Widely used in public transport, long-distance passenger transport, school buses, engineering vehicles, container trucks, tourist buses, logistics freight, police law enforcement vehicles, trains, subways, ships, airplanes and other mobile vehicles.

At present, the video and audio codec algorithms selected by various car hard disk video recorder DVR manufacturers mainly include: MPEG-2, MPEG-4, H.264, MJPEG, etc., among which MPEG-2 and MJPEG have low compression rates and are used less; H The .264 encoding algorithm has the characteristics of high video compression rate, low bit rate, and good adaptability to low-bandwidth wireless networks. It is the current choice of compression format for vehicle-mounted DVRs. With the improvement of digital encoding performance, the video resolution of car DVR is also raised from CIF (352×288) to D1 (704×576).

Working principle

Car DVR currently has three storage methods: hard disk, U disk, and SD card. In contrast, U disk (car U disk video recorder) is more reliable.

1. The U disk has no mechanical moving parts and low power consumption. It can be used in various buses with severe bumps and harsh power supply environments. And in these cars, ordinary car hard disk video recorders can’t work normally at all;

2. It is convenient to transcribe data. Just plug the U disk into the USB port of the computer to play back and save the video. No hard disk connector, USB adapter, etc. are required, and the operation is simpler;

3. The U disk interface design is suitable for repeated plugging and unplugging, which is more reliable than SD cards. The SD card interface is an internal interface of the device, and it is not suitable for frequent plugging and unplugging, otherwise the damage rate will be quite high. The USB interface is an interface between devices, which is specially designed for data exchange between devices. Regardless of the electrical, physical or mechanical properties of the interface, it is suitable for long-term use in exchanging data between devices.

Future development trend of vehicle DVR monitoring system

Judging from the overall development trend of the current security industry, networking and intelligence are the main development directions of current network monitoring. As an important storage tool in monitoring equipment. They are also destined to be a trend in the future of car DVR.

For the current equipment, although many functions such as multimedia and even navigation have been enhanced on the basis of the original functions. However, the relatively independent stand-alone operation mode still greatly limits the function of the vehicle DVR.

After all, compared with a complete monitoring system, a vehicle-mounted monitoring system with only one or two monitoring points does not have much value for stand-alone storage. If it does not implement network introduction and external communication, its attractiveness will definitely be difficult for people to spend money on.

Although the current wireless transmission technology is very rich. However, 3G technology is still difficult to “get on the car”, the EDGE coverage is too small, and the CDMA transmission bandwidth is not enough. But not at hand.

In addition, the intelligent development of equipment is another important aspect for car DVR to attract users in the future. Because the traditional video surveillance system only stores the data information, and draws valuable information through later review. So this is undoubtedly very passive in the work. As for the car DVR, it increases the workload of security managers.

However, if the car DVR is endowed with more intelligent functions, then not only can it have more autonomous working capabilities. At the same time, it can also be effectively incorporated into the security monitoring system of the entire city, in this case. The status of vehicle monitoring will undergo an important shift. The car DVR will also usher in its updated mission.

It can be found through the above description. The current car DVR has a very promising prospect, but in front of this bright prospect, there is a big or small bottleneck. If this bottleneck does not break through, then the car DVR will be bound in a very small market and struggling. And if it can help car DVR to squeeze out of this bottleneck under the combined effect of intelligence and network functions, then future car DVR will be more integrated into people’s life.