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Tunnel concrete duct piece defect detection method and device

A defect detection and concrete technology, which is applied to measuring devices, processing response signals of detection, and analyzing solids using sonic/ultrasonic/infrasonic waves, to achieve the effect of improving accuracy and detection efficiency

Inactive Publication Date: 2020-04-10
CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: how to improve the accuracy of sound velocity calibration during ultrasonic non-destructive testing of concrete, improve the signal-to-noise ratio, and reduce the difficulty of time-domain echo signal analysis, so as to improve detection efficiency and improve the accuracy of defect judgment Purpose

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  • Tunnel concrete duct piece defect detection method and device
  • Tunnel concrete duct piece defect detection method and device
  • Tunnel concrete duct piece defect detection method and device

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Embodiment Construction

[0036] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0037] The method of the present invention mainly includes three stages of signal acquisition, signal optimization processing and defect location, and the specific steps are as follows: figure 1 shown, including:

[0038] (1) Before starting data collection, first determine the detection area, and perform grid division on the surface to be measured according to the detection horizontal resolution requirements, usually the cell size is 5cm*5cm;

[0039] (2) Determine all scanning points. Then move from left to right along the first horizontal grid line, scan each point in turn, and repeat the process until all points in the area are scanned;

[0040] (3) Collecting signals;

[0041...

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Abstract

The invention, which relates to the field of tunnel concrete duct piece defect detection, discloses a tunnel concrete duct piece defect detection method and device. The method comprises the followingsteps: (1), determining a detection region, and carrying out the mesh generation of the detection region; (2), determining all scanning points; (3), collecting data signals; and (4), performing data processing on the data signals, and analyzing whether each scanning point has a defect or not. The method for collecting the data signals specifically comprises the steps that a data collection deviceis arranged on the surface of the detection region; each column of probes of the data collection device sequentially transmit pulse signals; other columns of probes receive echo signals, wherein the number of the probes of the data collection device is greater than or equal to two, and the number of the probes in each column is greater than or equal to two. Therefore, the accuracy of sound velocity calibration during concrete ultrasonic nondestructive testing is improved, the signal-to-noise ratio is improved, and the difficulty of time domain echo signal analysis is greatly reduced.

Description

technical field [0001] The invention relates to the field of tunnel concrete segment defect detection, in particular to a tunnel concrete segment defect detection method and equipment. Background technique [0002] With the continuous and stable development of my country's economy, the country is increasingly strengthening infrastructure construction. High-speed (passenger dedicated line) / heavy-haul railways and expressways are the main directions for the development of railways, roads and land transportation respectively. The level of new railways and road tunnels , scale and quantity are increasing year by year. In tunnel engineering, concrete is one of the main structural materials of buildings. Concrete is a multiphase composite system, and the phases are randomly intertwined to form an extremely complex internal structure. The damage of concrete is inevitable, including physical Processes, such as freeze-thaw cycles, fire, water erosion, and chemical processes, such as ...

Claims

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Application Information

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IPC IPC(8): G01N29/12G01N29/04G01N29/30G01N29/24G01N29/34G01N29/44
CPCG01N29/12G01N29/048G01N29/043G01N29/30G01N29/24G01N29/343G01N29/4427G01N29/4454G01N2291/014G01N2291/0232G01N2291/0289G01N2291/044G01N2291/105G01N2291/106G01N2291/2634
Inventor 张新黄威望孙策曹玉红
Owner CHINA RAILWAY CONSTR BRIDGE ENG BUREAU GRP 2ND ENG CO LTD
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