Misalignment Monitoring System Based on Position Sensitive Detector
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 incor-porating position and posture was formed.By means of position and posture transformation,the align-ment 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 hard-ware 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.Fi-nally,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 direc-tion.This system will be used for monitoring the alignment status of domestic diesel power plants.
marine power plantposition and posture measurementmisalignment monitorcom-pound iterative algorithm
国家科技期刊平台
NSTL
万方数据
