A multi-station acoustic response signal analysis method for eggshell crack detection

Abstract

The invention provides an eggshell crack detection method for multi-station acoustic response signal analysis, comprising: performing tapping rod excitation at n different excitation positions on the surface of a single poultry egg, and collecting a single excitation of the tapping rod at each excitation position There are a total of n response sound signals, wherein n is an even number > 2; use the initial point selection method to determine the starting point of the signal effectively excited by the percussion stick in each original acquisition signal, and use the effective signal band selection method to intercept each signal from The starting point of the effective excitation signal of the percussion rod is the sound signal band generated by the first strike of the percussion rod on the surface of the eggshell; the cross-correlation coefficient between the signals of a single egg is obtained by using the method of multi-signal joint analysis Discriminate whether there are cracks on the surface of poultry eggs according to the average result of the cross-correlation coefficient, the present invention solves the problem of poor adaptability existing when the existing eggshell crack detection model is applied to poultry eggs of different varieties, and the accuracy of detection High, the detection speed is fast.

Description

technical field

[0001] The invention relates to the technical field of poultry egg damage detection, in particular to an eggshell crack detection method based on multi-station acoustic response signal analysis. Background technique

[0002] According to the data from the National Bureau of Statistics, my country's poultry egg production has been on the rise in the past 20 years, and my country's production accounts for about 42% of the world's poultry egg production. Poultry eggs are prone to cracks during production, storage and transportation, and poultry eggs are prone to spoilage. If cracked eggs flow into the market, it is easy to cause serious food safety problems. Therefore, crack detection is a necessary link in the production and consumption of poultry eggs.

[0003] At present, there are manual detection and automatic detection methods for poultry egg crack detection in China: manual detection has low precision, slow detection speed, and is easily affected by subj...

Examples

Embodiment 1

[0050] Select 102 intact eggs and 100 intact duck eggs, and collect 16 signals for each egg according to the above method. After the intact egg signal is collected, cracks are made on the eggs and duck eggs, and 16 cracked egg signals are collected by the same method; use the above signal processing Calculate the collected signals by means of the method, and obtain the mean values ​​of the cross-correlation coefficients of the intact and cracked eggs, and the intact and cracked duck eggs, respectively, as follows: Figure 4 , Figure 5 shown. As can be seen from the figure, the detection rate of cracked eggs is 100%, and the misjudgment rate (discrimination of intact eggs as cracked eggs) is 2%; the detection rate of cracked duck eggs is 96%, and the misjudgment rate is 2%.

[0051] Therefore, a multi-station acoustic response signal analysis eggshell crack detection method of the present invention has a high accuracy rate for poultry egg crack detection, and can effectively ...

technical field

[0001] The invention relates to the technical field of poultry egg damage detection, in particular to an eggshell crack detection method based on multi-station acoustic response signal analysis. Background technique

[0002] According to the data from the National Bureau of Statistics, my country's poultry egg production has been on the rise in the past 20 years, and my country's production accounts for about 42% of the world's poultry egg production. Poultry eggs are prone to cracks during production, storage and transportation, and poultry eggs are prone to spoilage. If cracked eggs flow into the market, it is easy to cause serious food safety problems. Therefore, crack detection is a necessary link in the production and consumption of poultry eggs.

[0003] At present, there are manual detection and automatic detection methods for poultry egg crack detection in China: manual detection has low precision, slow detection speed, and is easily affected by subj...

Examples

Embodiment 1

[0050] Select 102 intact eggs and 100 intact duck eggs, and collect 16 signals for each egg according to the above method. After the intact egg signal is collected, cracks are made on the eggs and duck eggs, and 16 cracked egg signals are collected by the same method; use the above signal processing Calculate the collected signals by means of the method, and obtain the mean values ​​of the cross-correlation coefficients of the intact and cracked eggs, and the intact and cracked duck eggs, respectively, as follows: Figure 4 , Figure 5 shown. As can be seen from the figure, the detection rate of cracked eggs is 100%, and the misjudgment rate (discrimination of intact eggs as cracked eggs) is 2%; the detection rate of cracked duck eggs is 96%, and the misjudgment rate is 2%.

[0051] Therefore, a multi-station acoustic response signal analysis eggshell crack detection method of the present invention has a high accuracy rate for poultry egg crack detection, and can effectively ...

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