新型旋转角加速度传感器特性标定系统的研究

Research on the Characteristic Tuning System of the New Rotating Angular Acceleration Sensor

针对旋转角加速度传感器的标定问题,构建了一套特性标定系统。首先分析了永磁旋转角加速度传感器的工作原理,并提出了一种基于调频调压电源供电的、异步电动机纯单相运行的、可调频调幅的旋转角加速度脉动源系统;然后采用传统增量式光栅编码器和现场可编程门阵列构建了旋转角加速度测量系统;最后通过比较旋转角加速度传感器的输出电压峰值和测量系统得到的实际旋转角加速度峰值,对传感器输出特性进行了标定,得到传感器输出电压与角加速的特性曲线,线性误差为1. 81%。

A set of characteristic calibration system was constructed for the calibration problem of rotating angular acceleration sensor. Firstly,the working principle of permanent magnet rotating angular acceleration sensor was analyzed.A pure angular single-phase,adjustable frequency amplitude modulated angular acceleration pulse source system based on frequency-modulated voltage-regulated power supply was proposed. Then the traditional incremental type was adopted,a rotating angular acceleration measurement system was constructed by the grating encoder and FPGA. Finally,the output characteristics of the sensor were calibrated by comparing the peak value of the output voltage of the rotating angular acceleration sensor with the peak value of the actual angular acceleration of the measurement system. The relation curve between the output voltage and the angular acceleration was obtained,the linear error of which is 1. 81%.