Types of car anti-theft systems and their advantages and disadvantages[汽车修理知识]

carAnti-theft devices can be divided into four categories according to their structure and function: mechanical, electronic, chip and network. Here is a brief introduction to these four types of anti-theft devices.
1. Mechanical lock anti-theft
Mechanical lock is the most common application and the earliest car anti-theft lock, mainly divided intoSteering wheel lockAnd gear locks are two major categories.steering wheelMost car owners will use the lock, and there is no need to install it. The gear lock is generally installed on the center console, the lock body is connected to the body, and then the movement of the shift handle is restricted by the lock ring, but it needs to be drilled and installed, so not many people use it.There is also a new typetransmissionThe lock is directly made into a shift handle with a built-in card lock. It looks very beautiful, but the price is nearly 1,000 yuan, and the original shift handle needs to be replaced.
Mechanical locks mainly play a role in restricting the operation of vehicles, and can provide limited help in preventing theft, and it is difficult to resist the theft of heavy tools such as crowbars, hacksaws, and large scissors. However, they also have their advantages. It is a fact that it can delay the time for the car thief to commit the crime. Generally, it takes tens of seconds or even a few minutes for the car thief to pry the steering wheel lock, and the damage time of the gear lever lock is a little longer.
2. Electronic anti-theft system
Electronic anti-theft locks are one of the most widely used anti-theft locks at present, and are divided into two types: one-way and two-way.The main function of the one-way electronic anti-theft system is:switchDoors, vibrations or illegal door opening alarms, etc. There are also some brands of products that have added some functions according to customer needs: use an electronic remote control to complete the engine start, flameout, etc.The two-way visual electronic anti-theft system is much more advanced than the one-way one. It can thoroughly let the car owner know the actual situation of the car. When the car has an abnormal alarm, the LCD on the remote controlmonitorIt will show the conditions encountered by the car, but the disadvantage is that the effective range is only 100-200 meters.
Mastering the stick, but aiming for the yard. The electronic anti-theft system has a fatal injury: when the car owner uses the remote control to open and close the door, the car thief hiding nearby can use a receiver or scanner to steal the radio waves or infrared rays from the remote control, and then decode it to open the car. Anti-theft system.
3. Chip type digital anti-theft device
Chip-type digital anti-theft device is the focus of the development of car anti-theft devices. Most cars use this anti-theft method as the original anti-theft device.
The basic principle of chip type digital anti-theft device is to lock the carmotor, Electric circuit and oil circuit, the vehicle cannot be started without the chip key. The code key must be used to touch the code lock on the car to open the lock, which eliminates the ills of being scanned.Many high-end cars currently imported, domestically producedpublic, Guangzhou Honda, Palio and other models have been equipped with the original chip anti-theft system.
4. Network anti-theft
Network anti-theft refers to the realization of the car's door opening, closing, starting the motor, stopping the car, positioning of the car through the network, and the vehicle will provide remote vehicle condition reports according to the requirements of the car owner. Network anti-theft mainly breaks through the limitation of distance.
Currently, the main networks used are: wireless network (BB machine network), GPS (satellite positioning system), of which GPS is the most widely used.
The full name of the GPS system is "Global Satellite Positioning System". In fact, this technology is a major aerospace project developed by the United States at a cost of more than 10 billion U.S. dollars and lasted for more than 20 years. The initial stage was mainly used in wars. Later, GPS technology has been more in-depth application in the non-military field, and has achieved practical results in the field of anti-robbery and anti-theft in automobiles. GPS satellite positioning system is a network type anti-theft device, it mainly depends on locking the ignition or starting to achieve the purpose of anti-theft. GPS mainly uses the satellite monitoring center to provide 24-hour uninterrupted, high-precision monitoring services for vehicles. The system consists of a central control system installed in the command center, a mobile GPS terminal installed on the vehicle, and a GSM communication network. It accepts positioning information sent by global positioning satellites, calculates the longitude, latitude, speed, and direction of the moving target, and uses The short message platform of the GSM network is used as a communication medium to realize the transmission of positioning information. This round-the-clock service is very effective, but its shortcomings are also obvious: it is expensive and requires a certain monthly service fee.
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