高冲击三维加速度传感器横向灵敏度校准技术

探讨了高冲击三维加速度传感器相对横向灵敏度的校准技术。新制定的国标已规范化了传感器的相对横向灵敏度这一参数,它是加速度传感器的一个重要指标,但其定义仅对一维加速度传感器而言。为了扩展到高冲击三维加速度传感器相对横向灵敏度的校准上,笔者采用在空气炮上实现高冲击三维加速度传感器的校准方法采集数据,以三维加速度传感器的拟合直线代替校准曲线、用侧向芯片和主向芯片输出之比计算相对横向灵敏度,更便于使用者评价传感器的性能。完善了高冲击三维加速度传感器相对横向灵敏度测试和校准的技术。相比其他技术,采用的校准装置和校准方法既符合传感器峰值高、脉宽大的特点,又能完整地呈现三轴向间的输出关系。

New Calibration Technology of Relative Transverse Sensitivity of High Shock Tri-axis Accelerometer

This paper examines the relative transverse sensitivity calibration technology of high shock triaxis accelerometers. The latest established national standard normalizes the relative transverse sensitivity parameter of accelerometers. While this is an important index, it applies only to single dimensional accelerometers. To extend the index to calibrations of high shock tri-axis accelerometers, a method was adopted to collect data and calibrations based on an air gun, using linear line fitting to replace the calibration curve and computing relative transverse sensitivity with division of lateral chip output and main axis chip, which makes it more convenient for users to evaluate performance. This will perfect the testing and calibrating method of relative transverse sensitivity for the tri-axis accelerometer. Compared with others, the adopted calibration device and method not only showed high peak value and wide pulse duration, but also presented the complete output performance of three axes.