基于小尺寸Hopkinson杆的加速度计特性的研究  

Characteristics of Accelerometer Based on Micro-Hopkinson Bar

作　　者：李婉蓉[1] 范锦彪[1] 王燕[1] 

机构地区：[1]中北大学,山西太原030051

出　　处：《山西电子技术》2013年第4期76-78,共3页Shanxi Electronic Technology

摘　　要：主要利用(小尺寸)Hopkinson杆作为加载手段,对CA-YD-125型号的加速度计进行动、静态校准。采用差动式激光多普勒干涉仪来绝对复现冲击加速度的量值,通过积分运算法和最小二乘法的综合运用来获得准静态条件下加速度计的冲击灵敏度;利用FFT算法获得动态条件下的幅频特性曲线。试验表明,校准得灵敏度为0.07 8pC/(m/s2);工作频带内幅值在0.5 dB范围内波动。This paper takes micro-Hopkinson bar as a means of loading to calibrate the dynamic and static characteristics of the CA-YD-125 accelerometer.The bar is used to generate an excited acceleration pulse absolute measured value with the using of differential laser interferometer.Shock sensitivity of the accelerometer is calculated by combining the integral calculation and the method of least squares under quasi-static conditions and uses FFT algorithm to get the amplitude-frequency characteristic curve under dynamic conditions.It is demonstrated that the calibration sensitivity is 0.078 pC/（m/s2） and the amplitude fluctuations is within 0.5dB in working band.

关 键 词：加速度计 (小尺寸)Hopkinson杆 激光多普勒干涉仪 最小二乘法 FFT 

分 类 号：TP212.1[自动化与计算机技术—检测技术与自动化装置]