An inexpensive optical reflective sensor was evaluated for possible use as a precision proximity sensor. The output signal of the sensor was measured as a function of the distance of a flat reflecting surface from the front glass window of the sensor. The experimental data support the hypothesis that the sensor may be used as a precision proximity sensor.
In Embedded Based Calibration of Proximity Sensor project we are developed for proximity sensor based object detection. It consists of three modules light transmitter and receiver, microcontroller , lcd display. The LDR is connected with the microcontroller unit. The display indicates moving objects presnt or not.
The light sensors detect the moving object.The light sensor is connected to microcontroller. The microcontroller used is PIC 16F73. The microcontroller program is written in assembly language