基于跳频通信的汽车智能防盗器设计

Intelligent car anti-theft device design based on frequency hopping communication

摘要:

为解决现有普通汽车电子防盗器采用固定频率通信容易被破解及复制的问题，利用具有载波频率调制功能的射频收发芯片nRF905设计了一款新的防盗器，该防盗器在通信过程中不断改变通信频率，使信息无法被干扰或截获，防盗器很难被复制、破解，通过通信方案的优化和程序设计增加了跳频通信的可靠性，增加的双向通信功能使车主能及时掌握汽车状况及报警信息，并通过多传感器检测电路的设计增加了防盗器的可靠性，经测试达到了良好的防盗效果。

Abstract:

In order to solve the problem of the existing anti-theft device easily to be cracked and reproduced when communicating at a fixed-frequency, a new anti-theft device was designed on nRF905 which had the function of frequency modulation. Since the communication frequency was kept changing， the information could not be interfered or intercepted，and the anti-theft device was difficult to be reproduced and cracked．Through the communications program optimization and program design, the reliability of the frequency-hopping communications was improved. The car owner could gain prompt access to car conditions and alarm information through the two-way communication function. The multi-sensor detection circuit design could improve the reliability of the anti-theft device. The new anti-theft device has been tested to have a good effect，so it has good prospects of application.