Study on photoelectric and dynamical control system for fruit sizing

Abstract

A fruit sizing system based on photoelectric sensor is developed. The system uses AT89C51 microcomputer as its core, and a signal gathering circuit, a processing circuit, an output circuit and a display/keyboard unit are also provided. When it works, the system receives digital signals produced by fruits that shadow the light from a photoelectric sensor. After digital signals processed by the system software, every fruit's sizing level is deduced. Then, the system will output switch signals to open the sorting switches according to fruits' size, and fruits are dynamically measured and sorted in real time. Experiment results indicated that the system works well and can be easily controlled; meanwhile it is multipurpose by setting sizing levels to sort different kinds of fruits. © 2005 by International Federation for Information Processing.