In fact, there is no need to adapt the ultrasonic sensor module, because its volume and sensing area are larger, and many reflective photoelectric sensors have smaller volume and sensing area. I can use the one I currently use, and there are two modes. Switch mode and proximity sensor mode
bobvc133
commented
2 years ago 
In fact, there is no need to adapt the ultrasonic sensor module, because its volume and sensing area are larger, and many reflective photoelectric sensors have smaller volume and sensing area. I can use the one I currently use, and there are two modes. Switch mode and proximity sensor mode