Title:
NONDESTRUCTIVE DETECTION SYSTEM FOR INTERNAL DEFECT OF FRUIT, AND METHOD
Document Type and Number:
WIPO Patent Application WO/2023/138247
Kind Code:
A1
Abstract:
Disclosed are a nondestructive detection system for an internal defect of a fruit, and a method. The system comprises an aluminum profile frame, a conveyor belt, a tray, a pulse type gas spray device, and a laser Doppler vibrometer; when a piece of fruit passes a detection station, the pulse type gas spray device excites the fruit to vibrate, and the laser Doppler vibrometer evaluates a vibration response signal of the fruit; a time domain vibration response signal having a high signal-to-noise ratio is obtained by means of a denoising function of a wavelet transform, and a time domain vibration characteristic parameter is simultaneously extracted; then, the time domain vibration response signal is processed by utilizing a filter function of a wavelet transform, a frequency domain vibration response signal within a specified frequency range is acquired by means of a fast Fourier transform, and a frequency domain vibration characteristic parameter is simultaneously extracted; and a prediction model for an internal defect of the fruit is established on the basis of the acquired time and frequency domain vibration characteristic parameters. The present invention is able to more accurately and nondestructively detect an internal defect of a fruit, and is suitable for on-site detection.
Inventors:
CUI DI (CN)
DING CHENGQIAO (CN)
WANG DACHEN (CN)
DING CHENGQIAO (CN)
WANG DACHEN (CN)
Application Number:
PCT/CN2022/137242
Publication Date:
July 27, 2023
Filing Date:
December 07, 2022
Export Citation:
Assignee:
UNIV ZHEJIANG (CN)
International Classes:
G01N19/08; G01H9/00; G06F17/18; G06N3/04
Foreign References:
| CN114563347A | 2022-05-31 | |||
| CN110865158A | 2020-03-06 | |||
| CN101603927A | 2009-12-16 | |||
| CN111855800A | 2020-10-30 | |||
| CN214251799U | 2021-09-21 | |||
| JP2000097920A | 2000-04-07 |
Other References:
DING, CHENGQIAO: "Online Nondestructive Testing of Watermelon Firmness and Hollow Defects Based on Acoustic Vibration Measurement Technology", WANFANG DISSERTATIONS, 5 November 2021 (2021-11-05), CN, pages 1 - 124, XP009547489
Attorney, Agent or Firm:
HANGZHOU QIUSHI PATENT OFFICE CO., LTD. (CN)
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