激光内径测量系统数据处理模型研究

Research on Data Processing Model in Laser Measuring System of Gun Bore Radial Wear Quantity

针对现有火炮身管内膛径向磨损量检测仪器所存在的测量精度低、自动化程度不高等问题,设计了一套利用激光非接触测量技术对身管内径实现精密测量的系统。系统基于光学无接触测量原理,运用光学测量的理论和方法,设计并讨论了在实际运用中存在的问题和解决方法。针对定位中心与身管轴线不重合引起的测量误差较大等问题,运用最小二乘等数学方法建立了系统的测径数学模型,并通过计算机仿真,不断修改模型使数学模型与实验结果之间的残差最小,从而选择出最佳的测径模型,有效地提高了测径精度。实验证明,该系统稳定可靠,自动化程度高,解决了身管内膛径向磨损量精确测量的难题。

Aimed at some problems that radial wear quantity measuring accuracy of gun barrel inner bore was low, and the degree of automation was not high, by use of laser un-touched measuring technology, a precision measuring system of gun barrel inner diameter was designed. The system makes use of untouched measuring principle and general theory and methods of optics, and existed problems and solutions for practical application were discussed. Because the center of positioning device was not coincidence with barrel axial line, measuring error was larger. Aimed at these problems, diameter measuring mathematical model was established by means of least square method and other mathematical ways. And by use of computer simulation, the model was improved continuously so as to arrive at the minimum residual difference between mathematical model and experiment result. Thus the best diameter measuring model can be choosen from these models. The best model can effectively improve the diameter measuring accuracy. The experimental results showed that the system is stable and reliable, it has high degree of automation, and it can solve the difficult problems of accurate measurement of gun bore radial wear quantity.