Near-infrared fruit non-destructive testing device

Abstract

The invention provides a near-infrared nondestructive testing device for fruits. The device comprises a sample rack, a light source, a detector, an optical fiber and an optical fiber probe, wherein the sample rack is a columnar frame provided with a fruit placing table on the top; a through hole which is slightly smaller than a fruit is formed in the middle of the fruit placing table; a turbine lead screw lifter is arranged at the bottom of the frame; an optical fiber probe installation frame which is a hollow cylinder matched with the optical fiber probe in shape and with a first through slot on the side face is arranged on a lifting rod of the lifter; the width of the first through slot is greater than the wire diameter of the optical fiber; the optical fiber probe is erected on the top of the cylinder by virtue of a bump on the optical fiber probe; a hollow wedged block with a second through slot on the side face is arranged between the top of the cylinder and the bump; the hollow part of the wedged block is matched with the optical fiber probe in shape. The angle of the optical fiber is changed by way of arranging the wedged block on the optical fiber probe bracket, so that the problem that light is reflected by fruits is solved. The device provided by the invention is simple in structure, strong in practicality, low in cost and high in accuracy.

Description

Technical field [0001] The invention belongs to the field of infrared detection equipment, and particularly relates to a near-infrared fruit nondestructive detection device. Background technique [0002] Fruit non-destructive testing usually uses near-infrared spectroscopy diffuse reflectance to detect the sugar content of the fruit. Fiber optic detectors usually illuminate the fruit vertically. The diffuse reflection of the light through the fruit will also produce reflection. Once the reflection occurs, the detection result will be detected. This will affect the accuracy of the detection result, and how to design a near-infrared detection device that reduces or even avoids the reflection of light through the fruit has become a research topic for those skilled in the art. Summary of the invention [0003] The problem to be solved by the present invention is to provide a near-infrared fruit non-destructive detection device that reduces the degree of reflection of light after passi...

AI Technical Summary

Problems solved by technology

[0002] Non-destructive testing of fruits usually uses near-infrared spectrum diffuse reflection to detect the sugar content of fruits. Optical fiber detectors usually irradiate the fruit vertically. When the light passes through the fruit, it will also produce reflection phenomenon. Once reflection occurs, the detection results will be affected. How to design a near-infrared detection device that reduces or even avoids the reflection of light after passing through the fruit has become a research topic for those skilled in the art.

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