摘要
为了满足大型结构安全监测中振弦式传感器的数据采集需求,提出了一种用等精度测频实现振弦式传感器频率测量的实用方法,并给出了具体的硬件电路,系统硬件分为3部分:激振电路、测振电路、温度补偿电路。应用AT89C52单片机实现等精度测频的原理、实用电路,具有测频范围宽和测量精度高等特点,且应用AT89C52单片机实现激振频率可控。测频系统具有硬件电路简单,激振可靠、激振频率可控,温度补偿可以减小温度对振弦式传感器频率测量的影响,提高测量精度。
In order to meet the requirement of vibrating wire sensor＇s data acquisition in large scale structural safety monitoring, a practical method was presented, which can be used to equal accurate measuring frequency. The system hardware included oscillation circuit, measuring frequency circuit, temperature compensation circuit. This measuring frequency system applied single-chip microcomputer AT89C52 for realizing the equal-precision frequency measuring principle, applied circuit, controllable stimulation oscillation. This circuit has many characteristics such as simple circuit structure, credible stimulation oscillation, controllable stimulation oscillation, temperature compensation can reduce the influence of temperature during vibrating wire being measured and improve the precision.
出处
《仪表技术与传感器》
CSCD
北大核心
2008年第11期99-100,103,共3页
Instrument Technique and Sensor
关键词
振弦式传感器
激振
测频
温度补偿
vibrating wire sensor
oscillation
measuring frequency
temperature compensation
