System and method for detecting optical characteristics of fruit pulp tissue with integrated optical fiber probe

Abstract

The invention discloses a fruit pulp tissue optical property detection system and method adopting an integrated fiber-optics probe. The system comprises a tungsten halogen light source, illumination optical fiber, receiving optical fiber, the probe, an objective table, a switcher, a spectrograph, a computer, a pressure sensor, a pressure displayer and a vertical slide table. A calibration ghost solution is prepared, the actual space resolved diffuse reflection spectrum is obtained, the theoretical space resolved diffuse reflection spectrum is obtained through calculation, the final calibration coefficients, corresponding to different wavelength points, of all the receiving optical fiber are obtained through calculation, spectrum detection and spectrum calibration are conducted on a fruit pulp tissue sample to be detected, the predicted value of the space diffuse reflection spectrum is calculated, the measured value is extracted, and the predicted values of the reduced scattering coefficient and the absorption coefficient under different wavelengths are obtained through searching and calculation of an objective function value with the simplex optimization method. According to the system and method, environmental constraints existing in other methods are avoided, the adaptation range of a detection object is widened, the detection speed is increased, the calibration error is reduced, and online detection application prospects are broad.

Description

technical field [0001] The invention relates to an optical detection system and detection method for agricultural product objects, in particular to a detection system and method for the optical characteristics of fruit pulp tissue using an integrated optical fiber probe. Background technique [0002] The optical properties of biological tissues have been widely used in many fields, and have been frequently reported in the field of agricultural product detection. The tissue optical characteristics of agricultural products are gradually used to characterize their quality parameters such as sugar content and hardness. At the same time, they are also gradually applied in the classification, grading and screening, and internal flaw detection of fruit products. Two important optical property parameters in the measurement of tissue optical properties are the absorption coefficient and the reduced scattering coefficient. The absorption coefficient can quantitatively analyze the com...

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Problems solved by technology

[0006] In order to solve the problems existing in the background technology, the object of the present invention is to provide a system and method for detecting the optical characteristics of fruit pulp tissue with an integrated optical fiber probe, which integrates a space diffuse reflection probe with pressure control, and corresponding correction and calculation methods , so it makes up for the shortcomings of the traditional detection scheme to solve the problem of the inability to achieve fast and low-cost optical characteristic detection in the prior art

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