冲击加速度信号采集记录装置的设计与应用  

Acquisition and Storage Device of Shock Acceleration Signal

作　　者：吴志煌 吴志强[1] 王宇[1] 朱欣华[1] 

机构地区：[1]南京理工大学机械工程学院,江苏南京210094

出　　处：《自动化仪表》2016年第6期98-102,共5页Process Automation Instrumentation

摘　　要：为弹载制导等应用所研制的微机电系统(MEMS)惯性传感器或MEMS惯性系统,常常需要通过高冲击环境试验来测量传感器或系统的抗高过载能力。为了对待测器件或系统在试验过程中的冲击加速度进行全面的描述,设计了一种基于存储测试技术的小体积、低功耗的瞬态冲击加速度信号采集记录装置。系统的性能指标为:采样速率100 k Hz,采集时间大于5 min,采样分辨率为12位;具有RS-422通信接口,可以将存储数据上传到上位机。介绍了围绕系统设计指标开展的设计研究工作,讨论了设计方案、软硬件设计及测试方法。测试表明,设计完成的系统满足性能指标要求。Micro electro mechanical system( MEMS) inertial sensor or MEMS inertial system, developed for missile-borne guidance or other applications, generally need to measure their capacity against high overload through high shock test. In order to comprehensively describe the high anti-overload capacity of the sensor or system to be tested, a small volume, low power consumption acquisition and storage device based on storage test technology for transient shock acceleration signal is designed. The performance indexes of the system are:sampling rate of 100k Hz, acquisition time greater than 5min;and the sampling resolution of 12 bits;and RS-422 communication interface to upload data to PC. The design and research for implementing these indexes of the system are introduced. The designing scheme, hardware and software design, and testing method are discussed. The tests indicate that this system meets requirement of performance indexes.

关 键 词：冲击加速度 数据采集 串口通信 MEMS惯性传感器 AD7980 N25Q00AA 

分 类 号：TH824[机械工程—仪器科学与技术] TP27[机械工程—精密仪器及机械]