Metal-surface wall thickness detector with probes distributed in matrix mode and measurement method thereof

Abstract

The invention provides a metal-surface wall thickness detector with probes distributed in a matrix mode and a measurement method thereof. The method is mainly used for detecting various kinds of corrosion, detecting most cracks and monitoring expansion of the corrosion and the cracks. The principle includes that the probes and electrodes are arranged into arrays in an area to be detected, and the same drive signals are exerted to the electrodes; and then through measurement of small changes of an electrical field of a metal structure, a measured voltage value is compared with an initially set measurement value, and accordingly metal loss or the creaks or pits or grooves caused by the corrosion and the like are detected. The detector can be applied to storage tanks or other metal buildings. The detector has high sensitivity and precision, can detect changes of corrosion reduction in an early stage, and therefore precautionary measures are optimized before corrosion damage occurs. The detector can be used in high-temperature working conditions, has no problems of temperature drift or precision reduction, has the advantages of being small in measurement error, high in sensitivity, strong in anti-interference capability, wide in application range, and the like, and can achieve remote on-line measurement.

Description

[0001] technical field [0002] The invention relates to a novel non-destructive testing device and method, in particular to a metal surface wall thickness detector with probes distributed in a matrix and a measuring method thereof. Background technique [0003] In recent years, domestic petrochemical enterprises have refined high-sulfur and high-acid crude oil in large quantities, which has intensified equipment corrosion and brought more serious problems. In order to prevent accidents, it is necessary to strengthen equipment corrosion monitoring, especially for large-scale real-time detection of equipment wall thickness. It is urgently needed by enterprises at present. At present, ultrasonic testing is mainly used to detect the wall thickness of equipment. Ultrasonic thickness measurement requires a coupling agent, and the wall thickness of the measurement point is used for detection. Not only the measurement time is long, the work efficiency is low, but also the measureme...

AI Technical Summary

Problems solved by technology

At present, ultrasonic testing is mainly used for the detection of equipment wall thickness. Ultrasonic thickness measurement requires coupling agent, and the detection is to measure the wall thickness of the point. Not only the measurement time is long, the work efficiency is low, but also the measurement error is large and the sensitivity is not high.

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