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为实现某武器系统核心部件的自动精确测量,依据通用三坐标测量系统设计原理,研制了一套激光扫描自动测量系统。本文首先介绍了测量系统的组成;然后从激光测量头测量原理、电路原理和气路原理等三方面介绍了系统的工作原理;通过建立理想测量模型和实际测量模型,给出了测量坐标系与用户坐标系的转换关系及利用标准件进行系统参数标定的方法;最后,通过建立准刚体误差数学模型,对系统误差进行了分析、计算。测量结果表明,该系统单点测量精度优于7μm,球面度测量精度优于22μm。
In order to realize the automatic and accurate measurement of the core components of a weapon system, a laser scanning automatic measurement system was developed based on the principle of universal coordinate measuring system design. In this paper, firstly, the composition of the measurement system is introduced. Then, the working principle of the system is introduced from three aspects: the measurement principle of the laser measuring head, the principle of the circuit and the principle of the pneumatic path. The measurement coordinate system and the user are given by establishing the ideal measurement model and the actual measurement model. The conversion relation of the coordinate system and the method of using the standard parts to calibrate the system parameters. Finally, the system error is analyzed and calculated by establishing the mathematical model of quasi-rigid body error. The measurement results show that the single-point measurement accuracy of the system is better than 7μm and the accuracy of the spherical measurement is better than 22μm.