基于位敏传感器的对中监测系统

Misalignment Monitoring System Based on Position Sensitive Detector

为了实时掌握柴油机动力装置的对中状态,设计了一种基于位敏传感器的对中监测系统。首先提出了基于位敏传感器的位姿变化测量方法,形成包含位姿变化的非线性方程组,通过位姿转换获得对中变化;其次通过传感器支架组件实现对方程组常量的高精度测量,通过软硬件设计形成测量系统,设计了基于简单牛顿法的复合迭代算法,保证方程组快速、准确求解;最后对测量系统的精度进行了分析,并采用四维平台进行了验证。试验结果表明:对中监测系统噪声小,偏差量噪声在0.005 mm以下,开口角噪声在0.01°以下;精度受激光入射方向影响较大,最佳入射方向下,偏差量监测精度可达0.02 mm,开口角监测精度可达0.019°。该系统将用于国产柴油机动力装置的对中监测。

In order to grasp the alignment status of diesel power plants in real time,a monitoring system was designed based on position sensitive detectors.Firstly,a measurement method for position and posture was proposed based on position sensitive detectors,and a nonlinear equation group incorporating position and posture was formed.By means of position and posture transformation,the alignment deviation and opening angle changes were obtained.Secondly,high-precision measurement of the constants in the equation group was achieved through the sensor bracket components.Through hardware and software design,a measurement system was formed.A composite iterative algorithm was designed to ensure fast and accurate solution of the equations based on simple Newton s method.Finally,the accuracy of the measurement system was analyzed and validated using a four-dimensional platform.The experimental results show that the monitoring system has low noise,with a deviation noise of less than 0.005 mm and an angle noise of less than 0.01°.The accuracy is greatly affected by the incident direction of the laser,with a maximum deviation measurement errors isless than 0.02 mm and a maximum opening angle measurement errors is less than of 0.019°under the best incident direction.This system will be used for monitoring the alignment status of domestic diesel power plants.