photoelectric sensor的用法和樣例：
例句
- The reflector will be vibrated when the object is slipping,thus the output signal of the photoelectric sensor will be changed.
當物體有相對滑動時會引起反射鏡面的振動，由此引起光電感測器的輸出信號發生變化。 - When the pest crawls through the electro-optical sensor, it will produce a high level signals and begins to count the pulse signal, the count to the pest's number can be realized.
當蟲子通過光電感測器時，光電感測器輸出高電平信號對脈衝信號進行計數，就實現了對蟲子數量的統計。
