On board monitoring is mostly installed on buses and buses. Many vehicles will be equipped with on-board monitoring. What matters should be paid attention to in the installation of on-board monitoring?
1、 Long distance bus has the particularity of complex road conditions, fast speed and long body. It is recommended to install two or more hemispherical cameras to monitor the door and interior of the bus. If necessary, it can also be used in the rear of the vehicle and the luggage claim opening.
2、 The bus is crowded and the environment inside the bus is relatively poor. Therefore, it is required that the on-board hard disk video recorder has higher performance in anti-seismic and temperature adaptation. On the bus without air conditioning, the temperature inside the car can reach about 50 ℃ in summer in the south, and - 20 ℃ or even lower in winter in North China. In this environment, if the on-board hard disk video recorder does not have good characteristics, it is difficult to meet this requirement. In the car without good anti-seismic, the shock is also common hard disk video recorder can not achieve. To achieve no blind area and dead angle monitoring, it is best to install four car mounted cameras.
3、 In public security, fire, urban management law enforcement vehicles equipped with on-board hard disk video recorder, which has been very common in many developed countries abroad, and has gradually risen in China. On board hard disk video recorders can record law enforcement officers.
4、 Other special vehicles such as postal vehicles, cash transport vehicles, hospital emergency vehicles, school student pick-up vehicles, logistics distribution vehicles, customs supervision vehicles and dangerous goods transport vehicles can be installed with 1-4 cameras according to the monitoring needs, including infrared waterproof type or long focus zoom type.
5、 It is suggested that the on-board hard disk video recorder should be installed behind the driver's seat or on the luggage rack, and the following points should be paid attention to during installation: a. the on-board hard disk video recorder should be installed horizontally, more than 20cm away from the vehicle ground, and protective box must be installed if possible; B. the on-board hard disk video recorder must be installed firmly; c. The vehicle mounted hard disk video recorder shall not be installed near the engine (too hot) or the place where the heat can not be dissipated. The space around the machine shall be kept at least 15-20cm to ensure ventilation and heat dissipation; D. the on-board hard disk video recorder is designed to be non airtight due to the need for ventilation, so attention should be paid to waterproof.
6、 The power supply of on-board hard disk video recorder is a wide voltage input DC to DC switching power supply, which is suitable for 12V and 24V vehicles. The input power is between 60-100w, and the access wire diameter is required to be no less than 2.5mm2. The positive pole of the power line must be connected to the positive pole of the battery, and a 10A fuse is connected in series at one end near the battery. The negative pole can be grounded to the nearby vehicle body, but the grounding resistance must be less than 0.5 Ohm. The machine output camera power line can choose 1.5 square millimeter double row insulated sheathed wire, and the camera video cable can use copper 75-4 coaxial cable with more than 96 braids. The bare metal interface must be wrapped with adhesive tape to avoid short circuit.
7、 The maximum output power of the power supply is 60 watts, which supports the power supply of the machine itself and up to four cameras and pickup. It is not allowed to connect other electrical equipment.
8、 In order to facilitate the timely and efficient management of the management, it is suggested that the affiliated company purchase n + 1 vehicle mounted hard disk video recorders, of which "n" is the number of vehicles planned to be installed, and "1" is used by the company to play the video data of each vehicle, which can also be used as office environment monitoring.
Post time：2017/4/24 22:27:16 hits：4