精密离心机测控与加速度计标校自动化系统设计

Design of Automatic System for Test and Control of Precision  Centrifuge and Calibration of Accelerometer

摘要:

惯导加速度计在精密离心机上的标校试验,涉及精密离心机动态半径和静态半径精密测量、转速精确测控以及被校加速度计信号的正确采集与实时传输等,需严格控制各类测控仪器的动作时序逻辑实现精密离心机测控与加速度计标校试验的自动化操作；介绍一种精密离心机测控与加速度计标校试验自动化系统设计,硬件上基于LAN总线组网集成精密离心机各类测控仪器,构建分布式测控系统,并应用外部光栅编码器脉冲信号作为触发信号控制测控仪器的硬件同步时序逻辑；软件上应用共享变量技术实现各类测控参数的有序传输,针对动态波形类大数据测试信号的共享变量传输可靠性差问题,提出一种基于文件动态拷贝的网络数据传输方案,设计严格的共享变量传输逻辑机制,实现了各类测控参数正确有序采集与传输；应用试验表明,设计的测控与加速度标校试验自动化系统满足加速度计在精密离心机上的标校自动化应用需求,显著提高了加速度计标校试验效率。 

Abstract:

The calibration test of inertial accelerometer on precision centrifuge, involves exact measurement of dynamic radius and static radius, accurate control of wheel speed of precision centrifuge and signal acquisition of accelerometer calibrated, it needs control critically action timing logic of each test and control instrument to realize automatic operation of test and control and calibration test of accelerometer. An automatic system for test and control of precision centrifuge and accelerometer calibration test is introduced. For hardware, integrates instruments and builds distributed test and control system based on LAN bus, with external raster pulse signal as trigger signal to control timing synchronization logic of instruments; For software,applies net shared variable technique to realize kinds of test and control parameters sequence transmission, and for trustless reliability of big dynamic waveform data with shared variable technique, gives out a transmission project with file dynamic copying, and designs critical transmission mechanism of shared variable, realizes right acquisition and sequence transmission of kinds of parameters. Application test shows that this automatic system can fit automatic test and control of precision centrifuge and calibration test of accelerometer, improve calibration test efficiency remarkably. 