基于指纹识别与LIN总线的汽车车门系统设计

Design of Automotive Door System Based on Fingerprint Identification and LIN Bus

摘要:

为了提高汽车的安全性能,完善传统汽车的防盗问题,提出了一种新型的汽车门门锁控制方法,该方法将指纹识别技术结合LIN(local inerconnect network)总线网络对车门锁进行控制；其中通过主控节点微控制器ST792F150JDV1QC和从节点控制器ST2124J完成LIN网络数据通信,实现LIN网络的通信功能和对网关的控制,从而实现对车门锁系统的控制；该方法的指纹识别部分Gabor滤波器指纹识别方法,使用八通道的Gabor滤波器对预处理的指纹图像进行滤波,提取指纹图像的局部和全局指纹特征,使用欧氏距离方法对提取的指纹特征数据进行匹配；匹配结果经过LIN从节点控制器串行口接收,转化成LIN帧格式,传递至总线,主节点控制器接收分析,发送对应命令,实现门锁的开关；对系统进行实物搭建和系统测试,实验结果表明该方法能够有效的通过指纹实现对车门锁的开关控制,验证了提出方法的可行性。

Abstract:

In order to improve the security of the traditional car and perfect, a new type of door lock control method for automobile door is presented, which jointed the vehicle LIN bus network and the fingerprint recognition technology to control the door lock. Data communication achieved by the ST792F150JDV1QC as the main control node microcontroller, the ST2124J as the slave node controller for realize the communication function of LIN network and the control of the gateway. The method’s fingerprint identification section based on Gabor filter, fingerprint image is carried out using eight channels of Gabor filter, to extract the fingerprint features of the fingerprint image The fingerprint feature is matched with the Euclidean distance method in fingerprint verification. The matching result is received from the node controller serial port by LIN, converted into LIN frame format, transfered to bus, master node controller received and analyzed to send command to realize the door lock switch. To built and test the system, experimental results show that the method can effectively control the switch control of the car door lock by means of fingerprint, the feasibility of the proposed method is verified.