Preprocessing method and device for online detection signal of steel wire rope

A preprocessing device and signal detection technology, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of signal quantitative recognition influence, failure to filter out in time, judgment error, etc., to facilitate signal recognition and improve judgment accuracy , to ensure real-time effect

Inactive Publication Date: 2015-03-25
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

However, in the coal mine hoisting wire rope detection process, affected by the running speed and tension, the wire rope will vibrate and cause the detection signal to drift. Filter out, and affect the quantitative identification of subsequent signals, resulting in judgment errors

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  • Preprocessing method and device for online detection signal of steel wire rope
  • Preprocessing method and device for online detection signal of steel wire rope
  • Preprocessing method and device for online detection signal of steel wire rope

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Embodiment Construction

[0027] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more than two, unless specifically defined otherwise.

[0029] In the present inve...

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Abstract

The invention discloses a preprocessing method and device for an online detection signal of a steel wire rope. The method comprises steps as follows: a signal preprocessing model is established and comprises discrete digital morphological transformation and fast wavelet transformation; the online detection signal is collected; a low-frequency drifting signal, a low-frequency strand leakage magnetic field signal and a power-frequency interference signal which change with the speed are inhibited by the discrete digital morphological transformation, and the discrete digital morphological transformation performs inhibition by opening and closing morphological filters based on self-adaptive weighted combination; and the fast wavelet transformation inhibits high-frequency noise and the strand leakage magnetic field signal for filtering processing. According to the method of the embodiment of the invention, the filtering processing can be performed on the online detection signal of the steel wire rope, multiple interference generated during online operation of the steel wire rope is effectively inhibited, strange signals produced due to the steel wire rope are reserved, follow-up signal identification is facilitated, judgment precision is improved, meanwhile, the signal processing time is shortened, and the real-time performance of signal processing is guaranteed.

Description

Technical field [0001] The invention relates to the technical field of coal mine safety detection, in particular to a method and device for preprocessing of wire rope online detection signals. Background technique [0002] The main and auxiliary shaft hoisting systems of coal mines are the "throat" of coal mine production, and steel wire ropes are a key component of the main and auxiliary shaft hoisting systems of coal mines. Among them, the long-term use of the steel wire rope will cause "broken wire", "wear", "corrosion" and other phenomena due to fatigue and humidity in the environment, which poses safety risks. Therefore, in order to avoid the occurrence of wire rope broken rope accidents, many experts and scholars at home and abroad have studied a series of automatic detection methods for wire rope damage. Among them, only the electromagnetic detection method has been practiced and promoted. It is recognized as the most reliable detection method, but there are still shortcom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/00G01N33/00
Inventor 田劼王红尧孟国营周俊莹吴淼薛光辉张晞李国华
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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