一種低功耗自調(diào)零微應(yīng)變測(cè)量的結(jié)構(gòu)狀態(tài)監(jiān)測(cè)系統(tǒng)

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中圖分類號(hào)：TH73 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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、橋梁、管道以及重大機(jī)械設(shè)備等設(shè)施的使用壽命長(zhǎng)、投資巨大。（剩余8111字）