一种低功耗自调零微应变测量的结构状态监测系统

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中图分类号：TH73 文献标志码：A 文章编号：1671-8755（2025）02-0061-07

A Low-power Self-zeroing Micro-strain Measurement System for Structural Health Monitoring

CHEN Siyu， LIAO Xiaobo， YUAN Weifeng，CAI Yong （Key Laboratory of Testing Technology for Manufacturing Process， Ministry of Education， Southwest University of Science and Technology，Mianyang 621o1O，Sichuan，China）

Abstract：To address the limitations of existing micro-strain structural health monitoring systems，including the absence of automatic sensor zeroing capability and cumbersome field deployment，a low-power self-zeroing micro-strain measurement system for structural condition monitoring was designed. The signal acquisition circuit based on the Wheatstone bridge was improved by incorporating an auto-zeroing algorithm，effectively addressing zero-point drift issues.Circuit simulation verifies the linear relationship between the bridge output voltage and strain gauge resistance. Static and dynamic cantilever beam experiments demonstrate a nonlinearity error of 1.12% in the fitted calibration curve，and the maximum acquisition frequency of the system can achieve 200Hz . The system achieves real-time strain monitoring for critical components on oil well frames，demonstrating exceptional low-power performance and longendurance capability with 78% batery remaining after 72O hours of continuous operation，indicating strong potential for widespread application in structural health monitoring.

Keywords： Structural health monitoring； Auto-zero； Micro-strain acquisition； Low-power consumption

建筑物、桥梁、管道以及重大机械设备等设施的使用寿命长、投资巨大。（剩余8111字）