Most electronic practitioners are not strange to "watchdog", which is a technical means to prevent computer programs from jumping out of the death cycle. However, this article will show you a car in the traditional sense. "Dog", look at the design and mass production of the car keyless control system.
From the global auto market, the overall industry has maintained growth in the industry in 2005, and the sales volume increased from 65.95.76 million in 2005 to 89.678 million in 2015, the annual complex growth rate of 3.12%. With the increase in the amount of car, the anti-theft technology of the car has been widely concerned, and the details will be described below.
The development of the anti-theft system of the car mainly experienced three stages: traditional mechanical key systems, remote key systems, and keyless intelligence systems.
Traditional mechanical key system
This means reaches the anti-theft purpose by mechanical principles, the key to open the door, the key is fired, the technology is low, the anti-theft performance is insufficient, and the key information is easily replicated. It is now rarely used.
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Remote key system
The remote control key system is an upgrade of the traditional mechanical key system. Through the wireless RF technology, the remote control vehicle is not compared with the traditional mechanical key, the remote control key must be kept through the key and chip double recognition to start the car, which has a high technology content Features with sufficient security performance, and the chip has a variety of software, hardware encryption matching algorithm, increasing the difficulty of the system.
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Keyless intelligent system
At present, many models are equipped with keyless systems, keyless systems are an automatic lock door and open-door intelligent system. When the owner leaves the car, the inductor inductor inductor does not induces the presence of the key, and when the door lock, the vehicle is in the lock state, the signal will continue to signal, and when the smart key appears within the signal range, it will There is a response to complete the timing behavior.
Intelligent systems can not only be used in automobile locks, but also a smart movement such as air conditioning, which brings us a more comfortable car experience. The emergence of car keyless intelligent systems is convenient to the owner, and it also improves the safety performance of the car.
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Said so much, is it a very high-keyless control system? Is such a technique for a technique that uses a powerful chip design? I want to know how the matter is, and I will see the decomposition below.
The PCF79xx series chip is a product launched by NXP semiconductor vendors around the field of automake theft, driving the automobile anti-theft system into a higher stage. The chip has extremely low power consumption, ensuring the battery life, internal integration of UHF transmitters and LF frequencies, with various hardware and software encryption algorithms, such as Hitag2, Hitag2-E, Hitag-AES, etc. Communication security. And internally cured 32-bit unique identity identification code (ID), the encryption algorithm is bound to the ID, thereby achieving the effect that cannot be cracked, as shown in the following figure, the chip ID information read for the P800 programmer.
In the face of rapidly growing auto markets, the safety of automobiles caused a wide concern of society, and the demand for anti-theft systems is getting bigger.
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