超音波對射型感測器通常由以下兩個獨立的元件組成:發射器和接收器。評估和開關輸出電子元件位於接收器中。
發射器和接收器彼此精準相對安裝。一旦有物體中斷發射器和接收器之間的聲錐,感測器開關輸出便會啟動。
根據發射器和接收器之間距離的不同及/或物體尺寸的不同,可通過示教功能或電位器來調整接收器的靈敏度。
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