一种智能助力车力矩感测系统设计与实现

发布时间：2018-07-14 11:07

【摘要】：针对目前助力车力矩感测系统开发难度大、成本高等问题,设计一种基于敏感元件的新型助力车力矩感测系统。以敏感元件电阻应变片为核心的力矩传感器、以差分放大和A/D转换电路为主的信号处理单元、以低功耗无线射频芯片CC1110为核心的数据处理及无线收发单元等部件置于助力车中轴,实现力矩信号的采集;软件上运用加权递推平均滤波增强数据采集的稳定性,采用零点补偿和最小二乘法拟合矫正来确保数据的采集精度。利用感应耦合供电和无线数字传输技术实现了对位于中轴力矩采集部件电能与信号的非接触传输。最后在模拟实际骑行的基础上对系统的精度及耐久性进行了测试,结果表明,该系统工作稳定,测量精度较高,在20 000 km测试范围内,满量程误差小于1%,具有很好的推广价值。
[Abstract]:A new torque sensing system based on sensitive components is designed to solve the problems of high difficulty and high cost in the development of torque sensing system. A torque sensor with resistance strain gauge as the core, a signal processing unit based on differential amplifier and A / D conversion circuit, The data processing and wireless transceiver unit based on low power radio frequency chip CC1110 are placed on the center shaft of the booster to realize the acquisition of torque signal, and the weighted recursive average filter is used to enhance the stability of data acquisition. Zero compensation and least square fitting correction are used to ensure the accuracy of data acquisition. Using inductively coupled power supply and wireless digital transmission technology, the non-contact transmission of electric energy and signal is realized. Finally, the accuracy and durability of the system are tested on the basis of simulating the actual cycling. The results show that the system works stably and has a high measuring precision. In the range of 20 000 km, the full range error is less than 1, which has a good popularization value.
【作者单位】：苏州大学计算机科学与技术学院;
【基金】：国家自然科学基金资助项目(61272449;61201212)
【分类号】：U48

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