Automatic gain adjustment method and system for steel rail flaw detection, equipment and storage medium

An automatic gain adjustment and gain adjustment technology, which is applied to the detection of response signals, the use of sound waves/ultrasonic waves/infrasonic waves to analyze solids, instruments, etc., can solve the time-consuming and troublesome problems of manual adjustment, achieve timely and accurate gain adjustment, and improve detection efficiency. Effect

Inactive Publication Date: 2019-12-13
合肥超科电子有限公司
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for automatically adjusting the gain based on the height of the grass wave, so as to overcome the time-consuming and troublesome problem of manual adjustment

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  • Automatic gain adjustment method and system for steel rail flaw detection, equipment and storage medium
  • Automatic gain adjustment method and system for steel rail flaw detection, equipment and storage medium
  • Automatic gain adjustment method and system for steel rail flaw detection, equipment and storage medium

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Embodiment Construction

[0046] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0047] reference figure 1 , During ultrasonic testing, there will be a messy, clumped weed-like signal near the baseline, called grass wave. When we push the device to a place where there is no damage to the reflection, in the A-scan state, the reflected echo near the bottom line is a grass wave. The grass wave is the reflection of the grains in the rail material. The rail flaw detection generally requires at least a 4mm diameter damage location; through experiments, the echo amplitude of a flat-bottomed hole with a Φ4 unit orthogonal to the ultrasonic main beam is higher than that of the grass. The shape wave is about 30dB, so if we maintain the grass wave at a certain level, such as 10% to 20% of the screen, the refle...

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Abstract

The invention provides an automatic gain adjustment method for steel rail flaw detection, comprising the following steps: A, setting a percentage range of a standard value of a grass-shaped wave integral; B, sampling an oscillogram of a current grass-shaped wave, calculating an actual value through integration, and converting the actual value into a percentage actual value; and C, obtaining the relationship between the percentage range of the standard value and the percentage actual value through comparison, and carrying out gain adjustment. The automatic gain adjustment method for steel railflaw detection provided by the invention has the advantages as follows: the grass-shaped wave height is used as a reference, and gain adjustment is carried out to enable the grass-shaped wave height to be within a preset range, so that a damage echo signal can be obviously received through a screen, and the detection efficiency can be improved; and automatic gain adjustment is realized based on the grass-shaped wave height, manual participation is not needed, and it is ensured that electronic equipment can carry out gain adjustment in time and accurately.

Description

Technical field [0001] The invention relates to the technical field of rail ultrasonic flaw detection, in particular to a method, system, equipment and storage medium for automatic gain adjustment of steel rail flaw detection. Background technique [0002] In the ultrasonic flaw detection of steel rails, in order to perform comprehensive scanning and flaw detection on the head, waist, and bottom of the rail, multi-channel electronic equipment is usually used. These electronic equipment are installed on a trolley or a motor vehicle at a certain speed. The signal collected by the ultrasonic probe must be amplified by the electronic circuit to be displayed on the screen for the operator to judge. This kind of signal amplification is called "gain", and adjusting the multiple of signal amplification is called "gain adjustment". The multiple of signal amplification is generally expressed in dB. The operator will adjust the gain of each channel in real time according to the on-site in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04G01N29/40
CPCG01N29/04G01N29/40G01N2291/0234G01N2291/2623
Inventor 章罕乔嘉麒任书斌任书君
Owner 合肥超科电子有限公司
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