某型高精度激光扫描光栅电机的设计与验证

Design and Verification of A Certain Type of High-precision Laser Scanning Grating Motor

高精度激光扫描光栅电机的细分系统多数采用的是细分芯片的方案,具有可替代性差,细分精度不高的问题;同时目前国内振镜电机产品中很少有直接使用自主细分方案的光栅电机,因此,本设计基于金海创公司某型扫描电机重新设计了适配圆光栅传感器的电机,细化了传感器的安装方案;自主设计了光栅传感器的调理采集电路,并利用CPLD技术来实现传感器信号的采集及电子细分,在电子细分算法中,区分粗细分与精细分过程,通过构造正切函数的数据表来快速查询光栅位置,实现了单周期4 096倍电子细分的能力;最后设计了高精度角度步进平台上机采集系统,使用测试平台对所设计的光栅电机进行实际测试,测试结果达到了预计目标,具有很好的实用开发价值。

Most of the subdivision systems of high-precision laser scanning grating motors use the subdivision chip scheme,which has the problems of poor substitutability and low subdivision accuracy;at the same time,there are few domestic galvanometer motor products that directly use independent microchips.Therefore,this design redesigned the motor with a circular grating sensor based on a certain type of scanning motor of Sino-Galvo Company,and refined the installation scheme of the sensor;independently designed the conditioning and acquisition circuit of the grating sensor,and used CPLD technology to realize the acquisition and electronic subdivision of sensor signals.In the electronic subdivision algorithm,the coarse subdivision and fine subdivision processes are distinguished,and the grating position can be quickly inquired by constructing the data table of the tangent function,realizing the ability to subdivide the 4096 times electronically in a single cycle.The designed grating motor is actually tested by using the test platform,and the test results have reached the expected goal,which has good practical development value.