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Thin crack hammering response detection device and method for poultry egg

A detection device and technology for poultry eggs are applied in the field of detection of small cracks in poultry eggs to achieve the effect of eliminating the interference of subjective factors.

Inactive Publication Date: 2009-04-29
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of flexible piezoelectric thin-film sensors for cracks in poultry eggs has rarely been studied

Method used

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  • Thin crack hammering response detection device and method for poultry egg
  • Thin crack hammering response detection device and method for poultry egg
  • Thin crack hammering response detection device and method for poultry egg

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specific Embodiment

[0033] Such as figure 1 As shown, the percussion response detection device for small cracks in poultry eggs consists of an egg platform base 2, a stand 3, a percussion ball 4, a flexible piezoelectric film sensor and measuring points 5, 6 and 7, a data acquisition system 8, A / D conversion and conditioning system 9, and computer 10 etc. are formed.

[0034] Using flexible piezoelectric film sensors 5, 6 and 7 as LDTO-028K (broadband 0.001Hz-1GHz, Hong Kong Meilong Electronics Co., Ltd.), high-performance self-triggering PCL-6250 data acquisition card (sampling rate 1.25Ms / s, Advantech Technology Co., Ltd.) and A / D converter (MCP3421 from Microchip Corporation). Egg 1 is placed on the platform base 2, and the positions of the three sensors are at the large and small ends of the egg's longitudinal diameter (hereinafter referred to as 'big head' and 'small head') and the equatorial center of the transverse diameter (abbreviated as 'transverse diameter'). ). The detection adopt...

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Abstract

The invention discloses a knock response detecting device for tiny flaws on poultry eggs and a method thereof. The detecting device mainly comprises a detecting platform, a data acquisition device, an A / D converter and a computer, which are connected in turn. The method comprises the following steps: fixing a poultry egg on a platform base, and adopting a detection method of single-point excitation and three-point response; after the poultry egg is excited, triggering a response signal by a sensor signal, and collecting the response signal generated by a sensor through the data acquisition device; after conditioning and converting the signals through the A / D converter, carrying out fast Fourier transform to obtain a response frequency curve between 0 and 7,500Hz; after the response frequency is subjected to normalization treatment, taking highest amplitude to extract characteristic value and frequency characteristic value extracted by high-low amplitude in turn, and using principal component analysis and linear discriminant function analysis to carry out pattern recognition respectively. The method is not limited by environmental noise, eliminates interference of subjective factors during manual operation, and can accurately distinguish out the tiny flaws on the poultry eggs.

Description

technical field [0001] The invention relates to detection technology for small cracks in poultry eggs, in particular to a device and method for detecting small cracks in poultry eggs in response to knocking. Background technique [0002] Because the eggshell is thin and fragile, once broken, bacteria will quickly invade and multiply, causing corruption and deterioration of poultry eggs. Therefore, the damage detection of poultry eggs is one of the important links in the production, management and processing of poultry eggs. According to reports, the poultry eggs that my country buys every year account for more than 10-15% of the purchase amount due to the loss caused by spoilage. Therefore, the crack detection of poultry eggs is very necessary. [0003] At present, domestic and foreign industrial production mainly relies on manually removing stained eggs under light, and identifying and removing damaged eggs by observing, rotating and touching eggs, and listening to the so...

Claims

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Application Information

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IPC IPC(8): G01N29/34G01N33/08
Inventor 王俊陆秋君
Owner ZHEJIANG UNIV
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