基于LabVIEW的智能TAS传感器测试系统设计

Design of intelligent TAS sensor test system based on LabVIEW

针对线控转向用智能TAS传感器复杂性能的检测需求,研究分析了传感器的基本原理,利用USBCAN接口、STM32模块和伺服电机等硬件搭建了基于LabVIEW的传感器测试系统。系统以调用动态链接库TSMaster.dll函数的方式进行上位机和下位机之间的串口通信,实现了对传感器运行工况的模拟,并利用智能汽车接口实现了智能TAS传感器的协议解析,在LabVIEW开发环境中采用通知器模式实现了传感器与伺服电机信号的同步采集,同时设计了离散傅里叶分析、转角游标算法等数据分析模块对采集到的信号进行处理。测试数据表明,传感器扭矩信号输出偏差始终保持在±0.15°范围内,方向盘转角误差在±0.7°范围内,所设计的测试系统能在理想范围内对智能TAS传感器进行扭矩和转角性能的复合式测量,加快了厂商研发以及投产的进度,具有实际应用价值。

Aiming at the demand of testing the complex performance of intelligent TAS sensors for steering by wire,the basic principle of the sensors is studied and analyzed,and a LabVIEW-based sensor testing system is built using hardware such as USBCAN interface,STM32 module and servo motor.The system carries out serial communication between the upper computer and the lower computer by calling the dynamic link library TSMaster.dll function,realizes the simulation of the operating conditions of the sensor,and realizes the protocol parsing of the smart TAS sensor by using the smart car interface,and realizes the synchronous acquisition of the sensor and servo motor signals by using the notifier mode in the LabVIEW upper computer development environment,meanwhile The data analysis modules such as discrete Fourier analysis and corner cursor algorithm are designed to process the acquired signals.The test data show that the deviation of the sensor torque signal output is always within±o.15°and the steering wheel turning angle error is within±o.7°.The designed test system can perform the composite measurement of torque and turning angle performance of the intelligent TAS sensor within the ideal range,which accelerates the progress of the manufacturer's R&D as well as production,and has practical application value.