How to choose car anti-theft device

Analyze the characteristics of several types of anti-theft devices on the market, you will understand if you take a closer look:

1. Mechanical anti-theft

The main principle is to lock a certain mechanism on the car so that it cannot play its due role. There are many existing methods such as: transmission gear lock, steering wheel lock, brake pedal lock, clutch pedal lock, etc. The trouble is that the mechanical lock is large, and the owner must bring an additional key with him. But there are many ways to crack, because the core is a lock, which can't be used as a slapstick. It ca n’t be more rude, such as hydraulic shears; accidentally lost the key again ...

Second, electronic anti-theft

It is the most popular anti-theft device in the automotive market. Starting the anti-theft system can cut off the ignition coil or the oil supply circuit, and only use it under the control of the unlock key to release the anti-theft normally. There are many kinds of these methods; most domestic and foreign cars are equipped with key chip anti-theft system when they leave the factory. Only use the radio transmission chip in the key to communicate with the ECU of the car to start the car engine. There is also a sound and light alarm system. Light-emitting diodes are installed on the dashboard of the car, which can let the owner know the working status of the system and can also deter the car thief who spy on the car. When the car vibrates due to external force, or the door, trunk lid, and front cabin lid are forcibly opened, the system emits an alarm sound to deter car thieves. There is also a two-way alarm system, which has a more function to notify the owner than the simple flash and audible alarm system. When the car is invaded by the outside world, the nearby car owner can know the status of the car through the liquid crystal display key carried around.

But the trouble is that the rate of false positives is high, especially when a large car passes by, firecrackers sound, and thunderstorms are combined. The harsh alarm sound will affect the rest of the residents and cause public outrage. When the car is parked in the underground parking lot or is far away from the parking, the feedback signal cannot be received. There are currently regulations prohibiting such products.

The current situation is that the thieves did not take such anti-theft measures into consideration. Several people cooperated (disconnect, fire, and decode) easily, and the time was less than 3 minutes. Anti-theft system sufficient to deal with key chips;

3. Network anti-theft system

Mainly rely on social public networks to monitor the movement of vehicles.

1. GPS satellite positioning anti-theft system

It determines the location of the vehicle through the GPS satellite positioning system, and then transmits the location and alarm information to the alarm center through the GSM network. The alarm center controls the car through the GSM network and cuts off power / oil.

The disadvantage is that the price is higher; the service fee needs to be paid frequently; the power of the system operation is large; the privacy will be intruded; the vehicle will be exhausted at a long time without being used. Cars parked underground, under trees, near buildings, and indoor systems do not work.

The current method of thieves is to use cell phone signal jammers to block the contact between the vehicle and the alarm center, and the anti-theft system fails.

2. GSM, GPRS mobile anti-theft device

GSM mobile anti-theft device relies on the GSM communication network to carry out intelligent linkage anti-theft of mobile phones and cars. It has multiple functions such as anti-theft, monitoring, remote control, remote alarm, positioning, and anti-robbery. . Compared with similar products, the system also has the characteristics of more concealed installation, more advanced technology and more reliable performance. There is no need to build a base station, and the alarm is not limited by distance.

The disadvantage is that you need to pay the monthly fee for GSM numbers. Rely on the coverage of the GSN network.

The thieves also use cell phone signal jammers to block the contact between the vehicle and the alarm center, and the anti-theft system fails.

4. Biometric anti-theft system

Use the human body characteristics as the only unlocking key to lock the car engine.

Specific products include car fingerprint start controller and vein scan controller.

Using the large amount of information carried by human fingerprints and the feature that the coincidence rate of each person's fingerprint is almost zero, the information of the owner's fingerprint is stored in the system in advance, and the car can be started after verifying the identity through fingerprint comparison, even if the car thief It is also helpless to steal all the car keys.

The disadvantage is that it takes another 2 seconds to compare the fingerprint before starting the car.

There is no way for a thief to get your fingerprint, so he ca n’t steal your car.

In fact, thieves can crack any anti-theft method as long as they steal the owner ’s key. Only biometrics and only fingerprint car anti-theft devices can truly protect your car.

There are the following types of car anti-theft devices:

1. Mechanical anti-theft device, such as steering wheel lock, padlock lock, etc. (Available at roadside shops, around 100-200 yuan)

2. Electronic anti-theft alarm (also called microcomputer car anti-theft device) is an alarm that wows when the car body touches or vibrates (available at roadside shops, 100-2