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An automatic identification method of foreign bodies in an electric energy meter based on acoustic detection

An automatic identification and electric energy meter technology, which is applied in the field of electric energy meters, can solve problems such as the low detection accuracy rate of the sound signal recognition system, the wrong judgment of the listening recognition method, and the inaccurate detection results of the manual detection method, so as to achieve accurate and specific voice parameters. And effective, increase adaptability, beneficial to the effect of algorithm stability

Active Publication Date: 2018-12-18
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +2
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AI Technical Summary

Problems solved by technology

[0008] (1) The manual detection method is easy to cause inaccurate detection results due to human factors
[0009] During the artificial shaking process, due to factors such as the lead seal of the electric energy meter and the lack of tightening of the fixing screws of the watch case, noise with a frequency similar to that of the foreign object will be generated during the shaking process, resulting in an error in the judgment of the audio recognition method.
[0010] (2) The detection accuracy rate of the existing sound signal recognition system is not high

Method used

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  • An automatic identification method of foreign bodies in an electric energy meter based on acoustic detection
  • An automatic identification method of foreign bodies in an electric energy meter based on acoustic detection
  • An automatic identification method of foreign bodies in an electric energy meter based on acoustic detection

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Embodiment 1

[0065] Embodiment 1: as Figure 1 to Figure 6 Shown; A method for automatic identification of foreign matter in an electric energy meter based on acoustic detection, which includes:

[0066] S1: collect the sound signal data in the electric energy meter;

[0067] S2: Perform channel conversion on the collected sound signal data, and extract the sound signal data containing the foreign object channel;

[0068] S3: Denoising the extracted sound signal data through the variable step size LMS adaptive filtering algorithm;

[0069] S4: Preprocessing the denoised sound signal data, extracting short-term energy, MFCC coefficients and LPC coefficients and combining them into a feature matrix, performing dimensionality reduction processing on the feature matrix to obtain the feature vector corresponding to the maximum feature value;

[0070] S5: Input the feature vector into multiple Adaboost-based BP neural network weak classifiers, and use the feature vector as the feature of the f...

Embodiment 2

[0110] Embodiment 2: as Figure 1 to Figure 6 As shown; an automatic recognition method for foreign matter in electric energy meters based on acoustic detection, which includes: first, a channel conversion is performed on the collected sound data, and the sound data containing the foreign matter channel is extracted; secondly, through a variable step size adaptive filter The algorithm denoises the extracted sound signal, and then extracts short-term energy, MFCC coefficients and LPC coefficients through preprocessing, combines them into a feature matrix and performs dimensionality reduction processing on it to reduce the amount of data, and reduces dimensionality through matrix transformation The eigenvector corresponding to the largest eigenvalue is obtained; finally, the eigenvector is input into multiple BP neural network weak classifiers based on Adaboost, and the eigenvector is used as the feature of the foreign object sound signal in the electric energy meter and input in...

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Abstract

The invention discloses an automatic identification method of foreign bodies in an electric energy meter based on acoustic detection, which comprises the following steps: collecting sound signal datain the electric energy meter; carrying out channel transformation on the collected sound signal data to extract the sound signal data containing foreign body channels; carrying out denoising processing on the extracted sound signal data; preprocessing the denoised sound signal data are preprocessed and forming an eigenmatrix, and obtaining the eigenvector corresponding to the maximum eigenvalue byprocessing the eigenmatrix. Feature vectors are input into the weak classifier of neural network based on Adaboost, and the feature vectors are used as the features of foreign body sound signals in the watt-hour meter for classification and recognition. The invention improves the detection efficiency of the electric energy meter, which is favorable for improving the automation process of the electric energy meter detection. The method shortens the detecting time of watt-hour meter, improves the production efficiency and the utilization rate of equipment, and realizes the fast, efficient, safeand reliable foreign body sound detecting work of watt-hour meter. The recognition rate of foreign object watt-hour meter is greatly improved.

Description

technical field [0001] The invention relates to the technical field of electric energy meters, in particular to an automatic recognition method for foreign objects in electric energy meters based on acoustic detection. Background technique [0002] The detection of foreign matter in the existing electric energy meter generally adopts the method of "hand crank + human ear listening". In the verification workshop, the verification personnel shake the electric energy meter to listen to the sound, and can only shake one meter at a time, so the detection efficiency is low; in addition, the consistency of the movement of the manual shaking meter is poor, which will lead to unstable test results. Aiming at the problems of low efficiency and poor consistency of manual shaking meter detection, there is an urgent need for a system that can automatically detect the sound of foreign objects in electric energy meters. [0003] The sound detection technology is becoming more and more mat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00G06K9/62G06N3/08
CPCG06N3/084G06F2218/04G06F2218/08G06F18/214
Inventor 张进周全欧习洋李享友吴华冯凌欧熙胡晓锐宫林吉畅周游陈术吴健唐皇
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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