But step motor system and camera lens orbit camera and monitored control system

The utility model relates to a taking the photograph camera technical field, refering in particular to one kind and detect and error correcting step motor system through angle sensor, the terminal surface is equipped with synchronous pulley under the step motor, and the step motor up end is equipped with motor axle center and zero friction angle sensor, zero friction angle sensor detectable step motor's technical field 0. Through installation zero friction angle sensor on step motor's up end, realize need rotary motion taking the photograph camera's closed -loop control to the monitored control system camera lens to acquire present position's electric current or voltage signal, the synchronous pulley's on passing signal and the motor velocity ratio resolves the position at camera lens place, plays the effect of accurate positioning, rights the wrong automatically, does not receive the influence of interfering signal and mechanical oscillation, gas shock. 本实用新型涉及摄像机技术领域，特指种通过角度传感器来检测和纠错的步进电机系统，步进电机下端面设有同步带轮，步进