单线圈光电式振弦传感器测频系统的设计  

Research of Frequency Measurement System on Vibrating Wire Sensors of Single-Coil and Phototube

作　　者：姜印平[1] 赵会超[1] 赵新华[1] 钱振洋[1] 

机构地区：[1]天津市过程检测与控制重点实验室天津大学电气与自动化工程学院,天津300072

出　　处：《传感技术学报》2010年第1期28-33,共6页Chinese Journal of Sensors and Actuators

基　　金：天津市过程检测与控制重点实验室项目资助

摘　　要：在对振弦传感器的特性和工程应用进行研究的基础上,创新的设计了一种单线圈光电式振弦传感器,同时给出了相应的激振、拾振和测频系统的设计。振弦传感器采用单线圈电磁激振方式,应用光电管结合MCU进行振动信号反馈,不但简化了硬件电路,而且解除了激振和拾振中电磁干扰问题,提高了测量的精度和稳定性。激振中采用的扫频技术也使振弦的起振更加稳定可靠。By researching the characteristics and engineering applications of vibrating wire sensors,the vibrating wire sensors of single-coil and phototube is designed by an innovative method.In the mean time,a vibrating wire sensor＇s excitation,pick-up and frequency measurement system is designed by a new way.The vibrating wire sensors is excited by single-coil structure and the vibration signal will be feedback through the phototube and MCU.This structure not only simplify the hardware circuit,but also solve the problem of electromagnetic interference which generated by the course of frequency＇s excitation and pick-up,improve the measurement accuracy and stability of frequency.The application of sweeping frequency makes the vibration wire start-up more stable and reliable.

关 键 词：振弦传感器 激振 测频系统 安全预警 

分 类 号：TN274.5[电子电信—物理电子学]