应变片测量直线发电机活塞位移的疲劳分析  

Fatigue analysis of displacement-strain sensor used in linear alternator

作　　者：张建伟[1] 李正宇[2] 李青[2] 

机构地区：[1]中国科学院研究生院,北京100049 [2]中国科学院理化技术研究所,北京100190

出　　处：《电子测量技术》2012年第11期100-103,共4页Electronic Measurement Technology

基　　金：国家自然科学基金(10904154)

摘　　要：谐振式热声发电系统中,直线电机活塞处的压和流的相角对热声发电的效率有很大的影响。分析了目前的各种位移测量方法,并结合热声发电系统的自身特点,采用了基于应变片对形变的响应来测量直线电机活塞位移的方法。应变片在不同的黏贴位置有不同的使用寿命,通过实验证明了在合适的黏贴位置,应变片的寿命是能够保证的。该测量方法可靠,安装使用方便,节省资金,不需专门的安装空间,能有效的辅助谐振式热声发电系统的性能测试实验。In the resonant thermoacoustic generation system,the phase angle between pressure and flow at the piston of linear alternator has a great influence to the efficiency of the system. Several kinds of displacement measurement methods were analysised,and the method using strain gauges to measure the deformation of spring on the linear motor piston was taken, combined with the characteristics of thermoacoustic generation system. Strain gauge in a different adhesive location has a different life. It is proved by experiments that the life of the strain gauge can be guaranteed in appropriate adhesive location. The measurement method is reliable, easy to install, save money, no special installation space,and can effectively assist the test of the performance of the resonant thermoacustic power generation system.

关 键 词：热声发电 直线电机 位移测量 应变片 

分 类 号：TP212.12[自动化与计算机技术—检测技术与自动化装置]