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Device and method for forecasting survival rate of freshwater fish based on passive acoustic information

A technology for predicting device and survival rate, applied in fish farming, radio wave measurement system, instrument, etc., can solve undiscovered problems, achieve the effects of avoiding adverse effects, non-destructive testing, and reducing farming or transportation costs

Active Publication Date: 2017-02-08
HUAZHONG AGRICULTURAL UNIVERSITY
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  • Description
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AI Technical Summary

Problems solved by technology

[0004] Fish sound detection methods mainly include active sonar detection and passive sonar detection. In the existing research, active sonar methods are mostly used, and the application of passive underwater acoustic information detection technology to freshwater fish survival rate detection has not yet been found.

Method used

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  • Device and method for forecasting survival rate of freshwater fish based on passive acoustic information
  • Device and method for forecasting survival rate of freshwater fish based on passive acoustic information
  • Device and method for forecasting survival rate of freshwater fish based on passive acoustic information

Examples

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Effect test

Embodiment 1

[0045] 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, a second fish box 2, and a first hydrophone 4 is arranged in the first fish box 1 , the second fish tank 2 is provided with a second hydrophone 5, and the first hydrophone 4 and the second hydrophone 5 are connected to the acoustic recorder 3 respectively. The first fish box is used to collect freshwater fish sound signals, and the second fish box is used to collect background environmental noise, which is used for background environmental noise denoising during post-data processing.

[0046] The first fish tank 1, the first hydrophone 4, and the second hydrophone 5 are provided with several. When used for transportation or farming, there are multiple first fish boxes for placing fish, so each fish box for placing fish needs to collect fish sound signals.

[0047] In the process of large-scale bre...

Embodiment 2

[0050] Example 2 Crucian carp survival rate prediction model

[0051] 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.

[0052] 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.

[0053] 2) Extract character...

Embodiment 3

[0085] Example 3 Bream Survival Rate Prediction Model

[0086] 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 fish of bream ranges from 1 to 30. The minimum fish-to-water ratio is 1:666, and the maximum fish-to-water ratio is 1:21. Let it stand for 5 minutes until the fish is relatively stable in the water , set the acoustic recorder to collect fish sound signals.

[0087] The setting parameters are as follows: acquisition time: 1min; sampling frequency: 4000Hz; acquisition channel: dual channel; acquisition frequency: 3 times. There are 294 samples of bream sound signal.

[0088] 2) extract characteristic parameter...

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Abstract

The invention belongs to the technical field of quality analysis of agricultural products and specifically relates to a device and a method for forecasting survival rate of freshwater fish based on passive acoustic information. The device for extracting an original fish acoustic signal comprises a fish box, wherein a hydrophone is arranged in the fish box; the hydrophone is respectively connected with an acoustic recorder; sound-insulating cotton is arranged on the exterior of the fish box. The method for forecasting survival rate of freshwater fish comprises the following steps: collecting the original fish acoustic signal; performing de-noising treatment on the fish acoustic signal; extracting characteristic parameters of the fish acoustic signal, including short-time average energy, short-time average zero-crossing rate and frequency band energy; constructing a feature vector; dividing a sample set; selecting the feature frequency band of the fish acoustic signal; establishing a forecasting model for survival rate of freshwater fish. The forecasting model for survival rate of freshwater fish established according to the method provided by the invention can realize online detection for the survival rate of freshwater fish, can be used for detecting the survival rate of the fish in the processes of fresh water fish breeding and live fish transportation and has a significance in increasing the survival rate of the fish in the processes of fresh water fish breeding and live fish transportation.

Description

technical field [0001] The invention belongs to the technical field of agricultural product quality analysis, in particular to a device and method for predicting the survival rate of freshwater fish 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): A01K63/00A01K61/10G01S7/539
CPCA01K61/00A01K63/003A01K63/006G01S7/539Y02A40/81
Inventor 黄汉英李路熊善柏赵思明涂群资马章宇
Owner HUAZHONG AGRICULTURAL UNIVERSITY
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