高g值加速度校准激励脉冲的横向激光干涉测量方法  

Measurement of exciting pulse for calibration of high-g accelerometer using lateral laser interferometer

作　　者：范锦彪[1,2,3] 李玺[1,2] 徐鹏[1,2,4] 祖静[1,2] 

机构地区：[1]中北大学电子测试技术重点实验室,山西太原030051 [2]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [3]中北大学计算机与控制工程学院,山西太原030051 [4]中北大学理学院,山西太原030051

出　　处：《红外与激光工程》2015年第2期497-502,共6页Infrared and Laser Engineering

基　　金：武器装备预研基金(9140C1204050609);山西省青年科学基金(2008021015)

摘　　要：为了准确测量高g值加速度传感器校准激励脉冲的幅值和持续时间,研究了基于激光多普勒的加速度脉冲测量方法。在分析激光多普勒原理的基础上,设计了以光栅为合作目标的激光测速仪;针对干涉仪输出的存在零点漂移的多普勒信号,提出了基于多项式拟合和希尔伯特变换的局部均值分解法;利用该方法对实测多普勒信号进行了解算,得到了激励加速度脉冲;分析了由干涉仪及其合作目标引起的加速度脉冲的幅值和脉宽测量不确定度。实测数据表明:该方法在包含因子k=2时幅值测量的扩展不确定度为U=3%,脉宽测量的扩展不确定度为U=4.8%。测量精度符合ISO16063-13(2001)规定的指标。To accurately measure the amplitude and duration of exciting pulse for calibration of a high- g accelerometer, the measurement method of the exciting pulse was studied in this paper. Based on the analysis of the principle of Laser Doppler, a grating laser velocimeter was designed. A local mean decomposition algorithm based on polynomial fitting and Hilbert transform was put forward to process the Doppler signal with zero shift. The acceleration pulse was calculated using the above algorithm and the uncertainties of measurement of the amplitude and duration were analyzed and calculated. The expanded uncertainties verified by experiments are 3% for the amplitude and 4.8% for the duration with a coverage factor k =2. This method is effective for pulse measurement and the measurement precision met the requirements of ISO16063-13（2001）.

关 键 词：横向干涉测量法 校准激励脉冲 幅值 脉宽 高g值加速度传感器 

分 类 号：TB934[一般工业技术—计量学] TB133[机械工程—测试计量技术及仪器]