激光多普勒测振技术在农产品品质检测中的应用

Applications of Laser Doppler Vibrometer Technology in Nondestructive Detection of Agro-product Quality

准确检测农产品品质,可以为采后保存、分期销售、预测产品货架期以及产品分级提供可靠的依据。激光多普勒测振技术基于多普勒效应测量从振动物体表面散射回来的光所产生的频移,具有灵敏度高、非接触性测量、不破坏物体振动等优点,可通过测量农产品的振动特性实现对农产品品质的无损检测。论述了激光多普勒测振技术的进展、原理及其在农产品品质无损检测中的应用。

Accurate detection of agro-product quality can provide reliable basis for postharvest preservation, determining when to sell, predicting shelf-life and sorting. Laser Doppler vibrometer （LDV） technology is based on the Doppler-effect sensing the frequency shift of back scattered light from a moving surface, and has the advantages of high sensitivity, non-contact measurement, avoiding mass loading implication and so on. This technology can be used for nondestructive evaluation of agro-product quality by inspecting its vibrational properties. The development and principle of LDV technology, and its applications in nondestructive detection of agro-product quality were introduced.