The customized infrared beams sensor is composed of infrared light-emitting diodes, and the PN junction is made of materials with high infrared radiation efficiency. The forward bias voltage injects current into the PN junction to excite infrared light. The performance of the light-emitting diode of the infrared beams sensor is that the higher the current, the higher the temperature, and the higher the temperature, the higher the current. The power of the infrared diode is related to the size of the current, but when the forward current exceeds the maximum rated value, its emission power decreases instead. The infrared beam sensor can detect the presence or absence of an object by analyzing the state of the internal circuit.One side of the customized infrared beams sensor is installed with a plurality of infrared emitting tubes at equal intervals, and the other side has correspondingly the same number and the same arrangement of receiving tubes, each of which has a corresponding receiving tube and is installed on the same straight line. When there is no obstacle between the transmitting tube and the receiving tube in the customized infrared beams sensor, the modulated signal (optical signal) sent by the transmitting tube can reach the infrared receiving tube smoothly. After the receiver tube receives the modulated signal, the corresponding internal circuit outputs a low level.
In the case of obstacles, the modulated signal sent by the transmitting tube of the customized infrared beams sensor cannot reach the receiving tube smoothly. At this time, the receiving tube cannot receive the signal, and the corresponding internal circuit outputs a high level. When there is no object passing through the customized infrared beams sensor, the modulation signals (light signals) sent by all the transmitting tubes can smoothly reach the corresponding receiving tubes on the other side, so that all the internal circuits output a low level.