Intake refers to the cameras and equipment, pickup, for intake of images and sound; recording equipment refers to the recorder, the front-end capture to image and sound data recorded; display device refers to the display for viewing images and video surveillance play a sound. Most transportation companies in the building when the vehicle is no monitoring system installed in the vehicle display devices, because the video data is mainly used for business leaders and inspectors with the inspection, the driver and passengers do not need to see.
How to build a stable and efficient vehicle monitoring system? Here we analyzed and compared in several ways.
1. Display device that displays. Currently mostly used in liquid crystal display, 5.6-inch or 7 inch on it, small size, easy installation, power consumption is small, the probability of failure also much smaller. Because normally no need to install the monitor, so unknown here say, as long as not too bad to buy less of a problem generally.
2. Intake equipment, cameras and that the pickup. Because the car the sound is noisy, and the pickup price is cheaper, can better use a little pickup. Generally fitted on board one or two on it. The choice of a relatively complex point the camera, first determine the need for night vision function, such as the need will have to choose the camera with infrared capabilities; Secondly, the main chip is divided into SONY camera and SHARP, SONY SHARP chip camera resolution than the camera's resolution higher but the price should be expensive, require you to choose according to their own situation. There is a camera into 1 / 3 and 1 / 4, 1 / 3 of the camera to see a wide range of distance, but close to 1 / 4 of the camera to see a narrow range of distance, but it also needs to determine your actual needs . Must find a more reliable quality camera manufacturers to purchase, not freeloaders, or are vulnerable, because the camera market is also highly competitive, and some bad companies would hesitate to cut corners to reduce costs, will result in lower-quality product, especially in the automotive This relatively harsh environment, the more likely out of order.
3. Recording equipment, that is, car video recorder. VCR is a core part of the whole system, the most important one but the problem with video recorder, then the whole system loses its effect, so the choice must be very careful.
Main on-board recorders currently divided into two categories, the hard disk as a storage carrier, the car DVR; the other places the SD card as storage media, SD card recorder that car.
A large capacity storage for a long time, the other is not afraid of vibrations but store a short time; which requires the user to choose according to their needs. Car video recorder market is now more varieties, the price is uneven, from a functional point of view it we are similar, as the user in the end how to distinguish good or bad? Here's to my company's video recorder, for example, from several aspects specific analysis.
1) vibration. Needless to say that we all know, shock treatment is not good, hard disk is not working, there will be frequent data loss situation, leading to even more serious damage to the hard disk can not be used, giving the user a huge loss. Many companies just do some simple anti-vibration handle, take it for granted, or add some rubber spring, not through any scientific validation and testing, and some simply do not achieve the effect of shock, or even counterproductive. Our company car is used in DVR hard drive shock absorber technology patents, with excellent damping effect of the hard disk by a continuous 3000 hours of 5-500HZ simulated road vibration test, can withstand the maximum acceleration of 3g, to ensure that the hard disk VCR to stabilize the work. In addition to the hard disk will cause vibration effects, video recorder which will result in some cable connector loose, it can also cause video recorder does not work, so we recorders internal structure is very compact and simple design, basically there is not much cable connectors, etc., the maximum reduction in the probability of system failure.
2) power supply. Familiar with the car people know the car very severe voltage fluctuations, power handling is not good if the recorder, the work will be greatly affected machine, the machine is more likely to be burned, and SD cards also often the case were burned . The company currently uses the most advanced power design to the 7-60V wide voltage range of work,
Instantaneous pressure can reach 100V (car voltage transients often reach 70-80V), which is very powerful machine to ensure the stability of the normal work without interference by the voltage fluctuations, but no SD card is burned phenomenon. Most of the video recorder market power can only be 40V, the power once the car over-pressure, job insecurity will cause the host, the host will lead to serious and SD card is burned.
3) The dust and heat. Dust and high temperature for the electronics is also a very powerful killer of two, especially in the car on the dirt and large, the temperature is too high. This is just a higher demand vendors. Our company currently uses a VCR fanless fully enclosed structure, to avoid the fan to the chassis through an internal belt into a lot of dust, affect the board's life. Same chassis uses a full aluminum alloy material, the machine can work to maximize the chassis produced by heat from, and we designed the program itself, the heat is very small, so we need not worry about the machine's heat.
4) The functions and effects. After comparing the above aspects, a final look at what features are video recorders and video effects how this is a rather important part. First, the function to be relatively complete, in addition to the basic functions of video playback, but also need to be able to record vehicle driving speed, braking, cornering and other information there is license plate features a variety of videos to be able to set up the way, such as time recording, door video, ignition recording, alarm recording, and so on. There is a machine operation is simple, and the video data read are convenient, they are to be considered. Playback quality is very important, and sometimes accidents need evidence, but poor video quality not clear because it can hardly be evidence of effect. Currently single machine playback we might have similar, but there is a distinction between four-way machine, we used four recorders
The program is an independent channel, four-machine video after video quality of each Ruth single machine can achieve the effect; while some manufacturers to reduce costs is the use of four machine machine plus a four-way splitter program, This recorded image resolution single machine can only reach a quarter of the image effect can imagine.