基于压电式加速度计的导线微风振动传感器设计

发布时间：2018-05-16 20:12

本文选题：输电线路 + 微风振动　；参考：《高压电器》2017年04期

【摘要】：输电线路导线的微风振动往往会造成线路断股、断线、金具脱落等危害,传统的在线监测方法多采用暴露在户外的传感器,容易受恶劣气候的影响降低长期稳定性。文中针对这些问题,开发了基于压电式加速度计的输电线路微风振动在线监测系统,首先,通过安装在导线上的基于压电式加速度计的微风振动传感器采集导线的振动加速度,并通过快速傅里叶变换(FFT)、频域积分等方法得到振动频率和振动幅值;然后,通过Zigbee无线模块发送到安装在杆塔上的状态监测装置;最后,通过GPRS的通信方式将数据发送到省网公司监控中心。结果表明:利用基于压电式加速度计的微风振动传感器系统可以准确测量振动频率为1~150 Hz,振幅为0.1~1.5 mm的振动信号,并且通过振幅法计算的导线动弯应变值,也可以达到输电线路通用技术规范的基本要求。同时,文中设计的微风振动在线监测系统具有易安装、测量范围宽等特点,因此,该传感器为输电线路微风振动监测结果的准确可靠提供了有力的技术支持。
[Abstract]:The wind vibration of transmission line conductors will often lead to wire breakage, falling off of hardware and so on. The traditional on-line monitoring methods are mostly exposed to outdoor sensors, which are easy to be affected by bad weather to reduce long-term stability. In order to solve these problems, a transmission line breeze vibration on-line monitoring system based on piezoelectric accelerometer is developed. Firstly, the vibration acceleration of transmission line is collected by a piezoelectric accelerometer based on piezoelectric accelerometer. The vibration frequency and amplitude are obtained by the fast Fourier transform (FFT) method and the frequency domain integral method. Then, the vibration frequency and amplitude are sent to the state monitoring device installed on the tower by Zigbee wireless module. Finally, The data is sent to the provincial network company monitoring center through the GPRS communication mode. The results show that the vibration signal with a vibration frequency of 1 ~ 150 Hz and an amplitude of 0.1 ~ 1.5 mm can be accurately measured by the wind breeze vibration sensor system based on a piezoelectric accelerometer, and the dynamic bending strain of the conductor can be calculated by the amplitude method. It can also meet the basic requirements of general technical specifications for transmission lines. At the same time, the wind vibration on-line monitoring system designed in this paper has the characteristics of easy installation and wide measurement range. Therefore, the sensor provides a powerful technical support for the accurate and reliable monitoring results of the breeze vibration of transmission lines.
【作者单位】：西安工程大学电子信息学院;西安电子科技大学机电学院;

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