Seawall nondestructive testing method based on infrared ray thermal imaging technology

Abstract

The invention discloses a seawall nondestructive testing method based on an infrared ray thermal imaging technology. The seawall nondestructive testing method comprises the following steps: one section of a seawall is divided into a plurality of sections, wherein each section is respectively erected with an infrared ray thermal imager to detect; the infrared ray thermal imager in each section points at a wall body of the seawall in the section; a focusing wheel of the thermal imager is rotated so that a thermal image on a display screen of the infrared ray thermal imager becomes clear; a target infrared ray thermal image can be obtained by measuring an infrared ray difference of radiation between a determination target and a background by adopting the infrared ray thermal imager; the image and related measured data are stored; the damage analysis is carried out through the measured related data and the infrared ray thermal image; the related data and the infrared ray thermal images are obtained by carrying out synchronous measurement on the other sections of the whole seawall; the measured related data and infrared ray thermal images of the whole seawall are analyzed to realize inner damage identification on the whole seawall. With the adoption of the detection method, a monitoring area is large, the measurement distance is flexible and the efficiency is high.

Description

technical field [0001] The invention relates to the technical field of structural non-destructive testing, in particular to a seawall non-destructive testing method based on infrared thermal imaging technology. Background technique [0002] Zhejiang Province is located on the southeast coast, with a coastline of more than 6,600 km on the mainland and islands, accounting for 20.3% of the total length of the coastline in the country, ranking first in the country. In order to prevent seawater intrusion, receding coastline, and ensure the safety of coastal towns, industrial facilities and farmland, our province has built more than 750 seawalls with a total length of about 2200km. The seawall is the safety barrier for the core areas of our province's social economy—the east coast of Zhejiang and the areas on both sides of the Qiantang River, and the basic guarantee for our province's social economy. Due to the low terrain, high population density, high concentration of productio...

AI Technical Summary

Problems solved by technology

[0003] However, although surface damage such as damage to the slope protection structure of the embankment and damage to the wave wall on the crest of the embankment can be found through regular inspections, the hidden damage caused indirectly by them, such as: erosion of the embankment body, appearance of cracks in the embankment body, etc. It is not easy to find through regular inspections, therefore, seawall damage identification technology is a key technology for seawall safety

The traditional damage identification technology generally has the following disadvantages: 1. Manual detection method: detection is labor-intensive and material resources, the inspection range is limited, it is difficult to meet the assessment requirements, and it is impossible to realize timely detection and monitoring of sudden accidents

2. Magnetic flux leakage detection method: the detection signal is weak and the detection accuracy is not high

3. Electromagnetic detection method: the speed is relatively slow