【摘要】 利用线圈互感原理,并结合硬件电路设计一种地下位移测量系统,通过测量单元的对称结构实现对地下垂直位移与水平位移进行检测。测量系统由若干个相同的测量单元通过RS485现场总线串联组成,测量单元将互感线圈与硬件电路集合于一体。本文设计了由运动控制器为核心的实验平台模拟地下位移进行电压值的采集与标定,通过所得的电压值结合偏最小二乘回归方法进行数学模型的建立,最终实现对地下位移的测量。所建的模型对垂直位移与水平位移量的预测值最大误差1.1 mm,大部分误差在0.5 mm以下。实验结果说明本文中所设计的测量系统能够对地下垂直位移与地下水平进行准确预测,相比于其他地下位移测量方法,该方法对被测体的检测更全面且有更大的测量范围更多的应用场合。更多还原

【Abstract】 In this paper, the principle of coil mutual inductance, combined with the hardware circuit design of an underground displacement measurement system, through the measurement unit symmetrical structure to achieve the vertical displacement and horizontal displacement of the detection. The measuring system consists of several identical measuring units connected in series through the RS485 field bus. The measuring unit integrates the mutual inductance coil and the hardware circuit. In this paper, the experimental model is designed to simulate the underground displacement by the motion controller. The voltage value is collected and calibrated. The mathematical model is established by combining the voltage value and the partial least squares regression method to realize the measurement of the underground displacement. The maximum error of the model is about 1.1 mm for the vertical displacement and the horizontal displacement, and most of the error is below 0.5 mm. The experimental results show that the measurement system designed in this paper can accurately predict the vertical displacement and underground level. Compared with other underground displacement measurement methods, this method can detect the measured body more comprehensive and have more measurement range of the application.更多还原