Development of a smart axial strain sensor for static load testing of foundation piles
Sensors of stress or strain currently used in geotechnical and civil engineering applications have the disadvantage that a large quantity of measuring points would result in large bundles of cables.Based on the principle of resistive strain gauge,a type of smart sensor that supports serial communication over RS-485 is developed for the measurement of strain or stress of foundation piles,which has the benefit of good noise tolerance.All the sensors installed along a pile could share a common cable for power supply and communication,and there is no actual limits to pile length.The installation in the field is simple,convenient and efficient.The sensor has a compact structure with reliable waterproof protection.The internal measurement circuit mainly consists of a Wheatstone bridge excitation module,a signal conditioning module,a microcontroller with ADC,a precision voltage reference,and a RS-485 communication module.A group of sensors were calibrated after being assembled,and the calibration results obtained have shown their functionality and reliability.
Peng Zhang Kuihua Wang
Research Center of Coastal and Urban Geotechnical Engineering,Zhejiang University,Hangzhou,Zhejiang Province,China
国际会议
上海
英文
1-4
2018-10-12（万方平台首次上网日期，不代表论文的发表时间）