Low-cost lossless and fast detecting equipment for apple moldy core

Abstract

Low-cost lossless and fast detecting equipment for an apple moldy core comprises a light source module, a spectrum detection module, a processor, a man-machine interaction module and a voltage stabilizing power module. An LED light source at the wave band of 710 nm to 740 nm and an LED light source at the wave band of 870 nm to 890 nm are adopted for working in parallel, and irradiate an apple to be detected. The spectrum detection module is mainly composed of a photodiode and a signal conditioning circuit, light signals transmitting the apple irradiate the photodiode to be converted into electric signals, the electric signals pass through the signal conditioning circuit, and after low-noise amplification and lowpass filtering, the electric signals are converted into digital signals through an ADC sampling module to be transmitted into the processor. The processor is connected with the light source module to control the LED light sources at the two wave bands to be turned on and off in sequence, and the processor is connected with the spectrum detection module to collect spectroscopic data transmitting the apple and analyze the collected data to achieve disease judgment. The man-machine interaction module provides an equipment operating and test result display function. The voltage stabilizing power module supplies power to all the modules. The equipment is based on the near-infrared spectrum technology, the narrow-band LED light sources and the photodiode are adopted, and lossless and fast detection of the apple moldy core is achieved.

Description

technical field [0001] The invention belongs to the technical field of agricultural intelligent equipment, in particular to a low-cost non-destructive and rapid detection equipment for moldy core of apples. Background technique [0002] Apple mold core disease is a common apple disease. After the onset, the fruit begins to rot from the ventricle and gradually expands outward. In the early stage of the disease, the appearance of the fruit has no obvious characteristics, and it is easy to develop the disease during the storage period, which seriously damages the interests of fruit farmers and consumers. Since the disease occurs from the inside to the outside, and the appearance symptoms are not obvious, it is difficult to identify the disease during fruit picking and sorting. How to detect apples with moldy core has become a major problem in the process of fruit identification and deep processing. Effective identification of mold core disease will effectively improve fruit qua...

AI Technical Summary

Problems solved by technology

However, there are few studies on apple moldy core disease. Most of the research that has been carried out is based on the principles of apple impedance characteristics and light characteristics. The electrical impedance characteristics have a significant relationship with the content and ratio of various substances in the fruit. Affected by many factors, the interference is large and the effect is not ideal; the disease detection based on light characteristics mainly uses near-infrared spectral analysis technology, and the disease is identified according to the characteristic absorption peak of the material, which has high precision and good effect, but data analysis and model establishment Complicated, special-purpose computers are often used for data analysis and processing, and the price of spectrometers is high, making it difficult to apply research results in equipment

Recently, some scientific research workers have developed a small portable mold core detection instrument with narrow-band LED as the light source and photodiode as the acquisition device. There is no shading treatment in the process, the signal-to-noise ratio of the spectral signal is low, and the overall effect is not ideal

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