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Freshwater fish variety identifying device and method based on passive acoustic information

A freshwater fish and species technology, applied in the field of freshwater fish species identification devices, can solve problems that have not yet been discovered, and achieve the effects of improving the level of informatization, improving detection efficiency, and improving work efficiency

Active Publication Date: 2017-02-22
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Fish sound detection methods mainly include active sonar detection and passive sonar detection. There are many active sonar methods in existing research, but the application of passive underwater acoustic information detection technology to the identification of freshwater fish species has not yet been found.

Method used

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  • Freshwater fish variety identifying device and method based on passive acoustic information
  • Freshwater fish variety identifying device and method based on passive acoustic information
  • Freshwater fish variety identifying device and method based on passive acoustic information

Examples

Experimental program
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Effect test

Embodiment 1

[0066] Such as figure 1 As shown, a freshwater fish survival rate prediction device based on passive acoustic information, the device for extracting the original fish sound signal includes a first fish box 1 and a second fish box 2, and the first fish box 1 is provided with a first water tank. Hearing device 4, described second fish box 2 is provided with second hydrophone 5, and described first hydrophone 4, second hydrophone 5 are connected with acoustic recorder 3 respectively, and described first fish box 1, the outside of the second fish box 2 is provided with soundproof cotton 6.

Embodiment 2

[0068] 1) Acquisition and denoising processing of fish sound signal: respectively in figure 1 Inject 500L of water into the first fish box and the second fish box, the water temperature is 10-15°C, the dissolved oxygen is 7-8mg / L, and the pH is 7.2-7.5, and the first hydrophone and the second water The hearing device was arranged at 20cm below the water surface, and stood still for 5 minutes. When the fish was relatively stable in the water, an acoustic recorder was set up to collect fish sound signals.

[0069] The setting parameters are as follows: acquisition time: 1min; sampling frequency: 4000Hz; acquisition channel: dual channel; acquisition frequency: 3 times. Put grass carp, bream, and crucian carp into the No. 1 fish box, and the acquisition frequency is 1 time. A total of 44 sound signal samples of grass carp, 44 sound signal samples of bream carp, and 44 sound signal samples of crucian carp were collected, and the sound of no fish was collected. There are 44 signal...

Embodiment 3

[0092] Example 3 Crucian carp survival rate prediction model

[0093] 1) Acquisition and denoising processing of fish sound signal: respectively in figure 1 Inject 500L of water into the first fish box and the second fish box, the water temperature is 10-15°C, the dissolved oxygen is 7-8mg / L, and the pH is 7.2-7.5, and the first hydrophone and the second water The listener is placed 20cm below the water surface. Put the crucian carp into the No. 1 fish box. The number of live crucian carp is 1-50, the minimum fish-to-water ratio is 1:999, and the maximum fish-to-water ratio is 1:19. Let it stand for 5 minutes until the fish is relatively stable in the water , set the acoustic recorder to collect fish sound signals.

[0094] The setting parameters are as follows: acquisition time: 1min; sampling frequency: 4000Hz; acquisition channel: dual channel; acquisition frequency: 3 times. A total of 1363 crucian carp sound signal samples were collected.

[0095] 2) Extract character...

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Abstract

The invention belongs to the technical field of agricultural product quality analysis, and particularly relates to a freshwater fish variety identifying device and method based on passive acoustic information. A device for extracting original fish sound signals comprises fish tanks, hydrophones are arranged in the fish tanks respectively and respectively connected with an acoustic recorder, and soundproof cotton is arranged outside the fish tanks. The freshwater fish variety identifying method includes the steps of collecting the original fish sound signals; carrying out noise elimination processing on the fish sound signals; extracting the characteristic parameters of the fish sound signals, wherein the characteristic parameters include the short-time average energy, the short-time average zero-crossing rate and the frequency band energy; establishing feature vectors; dividing a sample set; selecting the feature frequency band of the fish sound signals; recognizing the variety through a probabilistic neutral network classifier. According to the established freshwater fish variety identifying method, the variety of freshwater fishes can be online recognized, and the device and method can be used for injury-free detection of the varieties of the freshwater fishes in the freshwater fish culturing and fishery resource surveying processes, and are of great significance in improving the informatization level of fishery facilities.

Description

technical field [0001] The invention belongs to the technical field of agricultural product quality analysis, and in particular relates to a device and method for identifying freshwater fish species based on passive acoustic information. Background technique [0002] my country is a traditional large fishery country, with the total output and export volume of aquatic products ranking first in the world. Among them, the aquaculture output of freshwater fish accounts for a large proportion of the total aquaculture output of inland aquatic products, and it is the main aquaculture species in my country. According to the data released by the China Fishery Statistical Yearbook, between 2009 and 2013, the average annual growth rate of freshwater fish in my country was 5.5%. (Liang Huanqiu et al., 2014; Liu Jia, 2014). Fish meat is delicious and nutritious. It contains animal protein, calcium, multivitamins and other nutrients necessary for the human body. It is an indispensable foo...

Claims

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Application Information

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IPC IPC(8): A01K61/90G01S15/96
CPCG01S15/96
Inventor 李路黄汉英赵思明熊善柏涂群资马章宇
Owner HUAZHONG AGRI UNIV
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