基于传感器的经纬仪自动变焦系统设计

Design of auto-zooming system of theodolite based on sensor

经纬仪观测过程中目标距离的不断变化,会造成成像大小的不稳定,给观察带来难度。为了使目标在视场中成像大小维持不变,必须进行变焦处理。结合实际工程遇到的问题,提出了基于距离传感器的自动变焦原理,制作了系统的硬件电路,设计了软件流程。对系统进行了测试和实际应用,结果证明:在变焦过程中,控制精度可以达到0.02 mm,自动变焦成像效果达到预期要求,验证了自动变焦原理和系统的可行性。

In the process of observation,distance of theodolite and target always change,which makes the size of target＇ s image unstable and takes problem to the observation.In order to make image size of target unchanged,zooming must be carried out.The principle of auto-zooming based on range sensor is put forward to solve the problem,fabricate hardware circuit and design software process.Measurement and practical application show that precision of control is 0.02 mm in the process of auto-zooming and the purpose of auto-zooming imaging effect satisfy the expected request,which verify that the auto-zooming principle and system feasibility.