Adjustable light source device for visible and near-infrared spectroscopy detection of fruit internal quality

Abstract

The invention discloses an adjustable light source device for visible near infrared spectrum detection of the internal quality of fruits. Three openings are evenly distributed in the horizontal equator of an integrating sphere at intervals, three LED light-emitting sources are installed on the three openings of the integrating sphere respectively, a light focusing system is installed at the outlet of the integrating sphere, and the three LED light-emitting sources and the light focusing system are all connected with a computer through a controller; each LED lamp bead set comprises an LED lamp bead strip formed by connecting four LED lamp beads in series, and the four LED lamp beads have the same wavelength; the LED lamp bead sets are connected with the controller after being connected with relays in series respectively, the LED lamp bead sets and the relays are all installed on a circuit board, and the circuit board is installed on the openings of the integrating sphere through fixing rings. Each LED lamp bead strip can be controlled to be turned on and off, spectra of different waveforms are output, and the experimental requirements of different varieties of fruits are met. Due to the LED lamp beads, the adjustable light source device has the advantages of saving energy and being environmentally friendly.

Description

technical field [0001] The invention relates to a light source device for detecting agricultural products, in particular to an adjustable light source device for visible-near-infrared spectrum detection of the internal quality of fruits, which is mainly used for the detection of sugar content in fruits. Background technique [0002] Visible near-infrared spectroscopy detection technology has become a very popular detection technology due to its fast and non-destructive characteristics. It is suitable for large-scale and automated industrial production, and can be used for online detection of agricultural products and automatic grading of agricultural products. The light source is an extremely important part of the spectral detection technology, and the light source provides the required spectrum for the detection technology. [0003] The light source currently used in the visible-near-infrared spectrum detection technology for citrus fruits is mainly halogen tungsten lamps. ...

AI Technical Summary

Problems solved by technology

These two methods both use tungsten-halogen lamps, but tungsten-halogen lamps have some disadvantages: high heat generation, high temperature, and low energy utilization rate. Due to high temperature, it will cause damage to components and affect the test results at the same time. High power, high energy consumption, no energy saving

Combined LEDs are widely used in calibrating light sources, but in the prior art there is a lack of applications and devices for the detection of optical characteristics of agricultural products

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