作者：王玲, 李慧琴, 李洲, 赵汉雨

作者单位：河南农业大学机电工程学院, 河南郑州 450002

关键词：振动加速度传感器; 自激振荡; 干扰; 调理电路; 滞后补偿

摘要：

为解决振动加速度传感器在实际使用中容易产生干扰及自激振荡等突发问题,在设计的加速度计检测电路基础上,通过建立数学模型分析产生自激振荡的原因,并结合具体的应用背景,采用了RC滞后补偿法,改善高频特性和通频带。电路经改进后,电路的抗干扰性能得到很大的改善,振动加速度传感器呈现出良好的加速度信号。

Research on eliminating self-excited oscillation for vibration acceleration sensors

WANG Ling, LI Hui-qin, LI Zhou, ZHAO Han-yu

College of Electrical and Mechanical Engineering, Henan Agricultural University, Zhengzhou 450002, China

Abstract: At present, vibration accelerometer sensors are widely used for their simple construction and low cost.But in the actual operation environment, they are prone to interference and self-excited oscillation, and other unexpected problems, which require circuit designed to resist interference and restrain self-excited oscillation, etc.On the basis of detection circuit design of the accelerometer, analyzing the reason of self-excited oscillation through establishing mathematical models, and taking the specific application background into concerned, the authors improved the high-frequency characteristics and the pass band with the method of RC lag compensation.Then, the improved circuit has excellent anti-jamming performance, and the vibration acceleration sensor gives excellent acceleration signal.

Keywords: Vibration acceleration sensors; Self-excited oscillation; Interference; Detection circuit; lag compensation

2009, 35(5): 85-87  收稿日期: 2008-12-5;收到修改稿日期: 2009-2-23

基金项目: 河南省科技攻关项目(082102210111)

作者简介: 王玲(1980-),女,河南西华人,讲师,硕士,主要从事微弱信号检测技术研究。

参考文献

[1] 黄鸿,吴石增.传感器及其应用技术[M].北京:北京理工大学出版社,2008.
[2] 郭涛,石云波,张文栋.压阻式硅基传感器的温度补偿方法研究[J].微纳电子技术,2003,40(7-8):489-491.
[3] 黄树森,郭南翔,黄晖.一种微机械压阻式加速度传感器及其设计优化[J].微纳电子技术,2003,40(7-8):305-308.
[4] 孟美玉,刘俊,石云波.三轴压阻微加速度计的结构力学分析[J].中国惯性技术学报,2007,15(3):355-358.
[5] 姚彬.传感器电路的抗干扰技术[J].煤炭技术,2004, 23(3):5-8.
[6] 约翰逊D E.有源滤波器精确设计手册[M].北京:电子工业出版社,1984.
[7] 徐栋.硅微加速度传感器厚膜混合集成方案与工艺研究[D].太原:中北大学,2007.
[8] 区健昌.电子设备的电磁兼容性设计[J].北京:电子工业出版社,2003.
[9] 郭艳萍,周海彬.电源线上的电磁干扰及抑制分析[J].家电科技,2006(1):51-52.
[10] 汤一平,贺武杰,朱艺华.智能全方位振动传感器的设计研究[J].传感技术学报,2007,20(8):1766-1770.
[11] 俞阿龙,黄惟一.振动速度传感器幅频特性改进方法的研究[J].自动化仪表,2004,25(5):4-7.