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Method and device for nondestructively detecting optical characteristic parameters of agricultural product

An optical characteristic parameter, non-destructive testing technology, applied in the direction of using optical device, measuring device, scattering characteristic measurement, etc., can solve problems such as the influence of shape

Active Publication Date: 2017-07-14
ZHEJIANG UNIV
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Problems solved by technology

However, since the surface of most agricultural products is non-planar, its contour will have a great influence on the SFDI detection results

Method used

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  • Method and device for nondestructively detecting optical characteristic parameters of agricultural product
  • Method and device for nondestructively detecting optical characteristic parameters of agricultural product
  • Method and device for nondestructively detecting optical characteristic parameters of agricultural product

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Embodiment Construction

[0087] The invention provides a method and device for non-destructive detection of optical characteristic parameters of agricultural products. The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0088] Such as figure 1 and figure 2 As shown, the present invention includes a projection part, an imaging part and a sample stage part. The projection part projects a sinusoidal grayscale pattern, which is irradiated onto the sample, and its diffuse reflection light is collected by the imaging part, and all components are installed in a black box.

[0089] The projection part includes projector 1, neutral density film 2 and polarizer 3; the imaging part includes CCD camera 7, signal generator 8, filter 6 and polarizer 3; the sample stage part includes electric translation stage 5, translation stage control Device 9; above-mentioned three parts all connect computer 10.

[0090] The light emitted by the proj...

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Abstract

The invention discloses a method and a device for nondestructively detecting the optical characteristic parameters of an agricultural product. The method comprises the following steps: carrying out spatial frequency domain imaging to obtain the optical characteristic parameter information initial values of a measured sample, carrying out phase measurement profilometry to obtain the surface height information of the measured sample, correcting the optical characteristic parameter information initial values of the measured sample by using the surface height information of a standard reflecting plate to obtain the corrected optical characteristic parameters of the measured sample, replacing the measured sample with a semispherical solid phantom, repeating above steps, carrying out calculation to obtain optical characteristic parameter fitting coefficients, and carrying out calculation to obtain the final optical characteristic parameter values of the measured sample agricultural product. The device comprises a projecting part, an imaging part and a sample table part, and the projecting part is formed by a projector, a neutral density sheet, two polaroid sheets, an electric translation stage, an optical filter and a CCD camera. The method and the device realize the nondestructive detection of the optical characteristic parameters of the agricultural product, and have the advantages of large imaging range, high precision, low cost and simplicity in operation.

Description

technical field [0001] The present invention relates to a method and device for non-destructive detection of optical characteristic parameters of agricultural products, in particular to a method and device for non-destructive detection of optical characteristic parameters of agricultural products by combining spatial frequency domain imaging technology and phase measurement profilometry. Background technique [0002] The food industry must realize rapid and non-destructive detection of food during processing operations to ensure food quality and safety. Near-infrared spectroscopy (NIRS) is rapidly becoming the method of choice for routine analysis of agricultural products due to its high precision and high efficiency. However, as an empirical method, NIRS does not require a comprehensive understanding of the physical relationship between spectral data and chemical functional groups; on the contrary, NIRS is based on the mathematical relationship between spectral and referenc...

Claims

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Application Information

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IPC IPC(8): G01N21/47G01B11/25G01B11/06
CPCG01B11/0608G01B11/254G01N21/4738
Inventor 饶秀勤何学明傅霞萍李庭苇
Owner ZHEJIANG UNIV
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