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Analysis of the principle and structure function of four types of automobile anti-theft devices
Jan 17, 2019

Car alarm is a high-tech anti-theft product that integrates GSM network digital mobile communication technology and GPS satellite positioning technology. It is a new generation of car anti-theft products after one-way anti-theft device and two-way anti-theft device. So, what are the categories of car alarms? What is the principle and structure of the car alarm? Xiaobian is organized as follows. 
1. Mechanical lock anti-theft
  mechanical lock is the most common application and the earliest car anti-theft lock , mainly divided into two categories: steering wheel lock and gear lock. The steering wheel lock is used by most owners and does not require installation. The gear lock is generally installed on the center console, the lock body is connected with the body, and the shifting handle is restricted by the lock ring, but the drilling is required to be installed, so there are not many people using it. In addition, there is a new type of transmission lock, which is directly made into a shifting handle with a built-in latch. It looks very beautiful, but it costs nearly 1,000 yuan, and the original shifting handle should be replaced. 
  Mechanical locks mainly play a role in limiting the operation of the vehicle. They can provide limited assistance in anti-theft and it is difficult to resist the theft of heavy tools such as shovel, hacksaw and large scissors. However, they also have their advantages. It is a fact that can delay the crime of stealing car thieves. Generally, car thieves can use dozens of seconds or even minutes to open the steering wheel lock, and the time of the shift lever lock is longer. 
2. Electronic anti-theft system
  Electronic anti-theft lock is one of the most widely used anti-theft locks, divided into one-way and two-way. The main functions of the one-way electronic anti-theft system are: the door opening and closing of the car, vibration or illegal opening of the door alarm, etc. There are also some brands of products that add some functions according to the customer's needs: use the electronic remote control to complete the engine start, flameout and so on. The two-way visual electronic anti-theft system is much more advanced than the one-way, and can completely let the owner know the reality of the car. When the car has a change alarm, the liquid crystal display on the remote control will show the condition of the car, but the disadvantage is 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 owner uses the remote control to open and close the door, the car thief hiding in the vicinity can useThe receiver or scanner steals radio waves or infrared rays from the remote control and decodes it to turn on the car's 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 device as the original anti-theft device. 
  The basic principle of the chip type digital anti-theft device is to lock the motor, circuit and oil circuit of the car, and the vehicle cannot be started without the chip key. To use the password key to touch the lock on the car to unlock, to eliminate the drawbacks of being scanned. At present, many high-end cars imported, domestic Volkswagen, 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 opening and closing, starting motor, stopping the car, the positioning of the car through the network and the vehicle will provide remote status reports according to the requirements of the owner. Network security is mainly to break the limit of distance. 
  At present, the main networks used are: wireless network (BB machine network), GPS (satellite positioning system), and the most widely used is GPS. 
  The GPS system is called the "Global Positioning System". In fact, this technology is a major aerospace project that the United States spent more than 10 billion US dollars and developed over 20 years. It was mainly used in the early days of war. Later, GPS technology gained more in-depth application in the non-military field, and achieved practical results in the field of anti-theft and anti-theft of automobiles. The GPS satellite positioning system is a network type anti-theft device, which mainly relies on locking ignition or starting to achieve the purpose of anti-theft. GPS mainly uses 24-hour uninterrupted and 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 receives the positioning information from the global positioning satellite, calculates the longitude, latitude, speed, direction of the moving target, and utilizes it. The short message platform of the GSM network serves as a communication medium to realize the transmission of positioning information. This all-weather service is very effective, but its shortcomings are also obvious: expensive, monthly service fees.
  These are the four common types of car alarms. They understand the principles and structural functions of these car alarms. It is very helpful for consumers to choose the right car anti-theft lock according to their needs.

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