激光测径仪温度测量误差修正的研究

针对激光测径仪随温度变化而易造成测径误差的问题,采取了线性补偿和非线性补偿相结合的温度误差修正方案.研究了温度与误差数据的关系,通过给激光管加热,测试在温度影响下激光测径仪的误差数据.针对误差数据建立线性补偿和非线性补偿相结合的修正方案,设计了相应的温度误差修正系统.研究结果表明,经过温度误差补偿后,激光测径仪的精度大大提高,最大相对误差由修正前的0.39％减小到修正后的0.04％,且随着温度的变化,测量数据无明显波动.

Research on Temperature Measurement Error Correction in Laser Diameter Measuring Instrument

In order to solve the problem of temperature variation influence on the error of laser diameter measuring instrument,a scheme of temperature error correction combining linear compensation and nonlinear compensation is adopted.The relationship between temperature and error data is studied,through heating the laser tube,the error data of laser diameter detector influenced by temperature are tested.A modified scheme combining linear and nonlinear compensation is established according to error data,and the corresponding temperature error correction system is designed.Research results show that the accuracy of the laser diameter measuring instrument is improved greatly after temperature error compensation,maximum relative error is decreased from 0.39% before correction to 0.04% after correction.With the change of temperature,the measured data have no significant fluctuations.