Automatic Weighing and Grading System for Korla Fragrant Pear

In order to improve commodity value of Korla fragrant pear，grading of fragrant pear is a common method.A pear grading equipment based on weight index of fragrant pear was presented with a weighing module that made up of pressure sensitive transducer and AD converter，and executive module was made up of pneumatic pendulum bar to realize classification of fragrant pear.By using tapered roller with turnover ability and high-speed motion ability as the pallet of grading line，it met demand of high-speed classification，and also would provide a platform to extract image based on identification of external quality of fragrant pear.Experiment proved that accuracy of weight of grading line was within 0.4 g，average error rate was 0.4 %，and precision met commercial process requirement.When motor operation was above 15 Hz，classification accuracy was close to 100%，which met production requirements.