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| Automatical adjustment system of height between sample and
detector of optical inspection for agricultural products |
| 1.College of Engineering, China Agricultural University, Beijing 100083, China; 2.National R＆D Center for Agroprocessing Equipment, Beijing 100083, China |
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Abstract To automatically adjust the height between sample surface and optical fiber or camera lens of optical detection for agricultural products, an automatic system for height adjustment was established based on light sensor.The working principle，the hardware structure and the software of the proposed system were introduced．Motion controller and microcontroller were used as control and detecting unit. Based on dialog program model, MFC was developed to control the overall system by end user. The experimental results show that the developed system can automatically adjust vertical height with speed of 9.7 mm·s-1, and the system error is less than 1 mm. Compared with manual adjustment， the automatic system can significantly reduce the standard deviation of reflected light intensity by height. The nondestructive detection of agricultural products can be realized by the proposed automatic height adjustment system with improved precise and efficiency.
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2014, Vol. 35 
