Photoelectrictrackingsystem with horizontal gimbal can not track objects near zenith.
天顶跟踪盲区是地平式光电跟踪系统的固有缺陷。
2
Photoelectrictrackingsystem is adopted to ensure the automatic correcting of the double face printing design on the packing bags, precise in counting.
采用光电跟踪系统，自动计数，并保证包装袋双面印刷图案的自动对版。
3
BP neural network system errors modifying method improves the precision than globe function method about 20% and may be used in three-axis photoelectrictrackingsystem.