Metal pipe wall thickness detection device and detection method

Abstract

The invention discloses a metal pipe wall thickness detection device, and relates to the technical field of the ultrasonic detection. The device comprises an electromagnetic ultrasonic sensor, a mounting part for mounting the electromagnetic ultrasonic sensor, a buffer module and a driving module which are connected in order. The invention further provides a metal pipe wall thickness detection method, the method comprises the following steps: the driving module drives the buffer module, and then drives the mounting part for mounting the electromagnetic ultrasonic sensor, so that the electromagnetic ultrasonic sensor is propped against a metal pipe and rotates the metal pipe, the electromagnetic ultrasonic sensor is maintained to always close to the metal pipe, and the electromagnetic ultrasonic sensor transmits and receives a detection signal. The detection device disclosed by the invention is long in service life, convenient for operation, convenient and practical, and has the functions of improving the energy conversion efficiency, and satisfying the detection on the metal pipe wall thicknesses in different specifications.

Description

technical field [0001] The invention relates to the technical field of ultrasonic detection, in particular to a metal pipe wall thickness detection device and detection method. Background technique [0002] The wall thickness of the metal pipe is an important indicator of the metal pipe. The out-of-control of the production process will cause the wall thickness to be out of tolerance or abnormal, resulting in rework or scrapping, thereby causing economic losses; the wall thickness is an important part of the closed-loop control in the automated metal pipe production. On-line measurement of thickness is of great significance to the automatic production of metal pipes. [0003] Electromagnetic ultrasonic measurement technology has the advantages of high precision, non-contact, suitable for high temperature detection, etc., and is widely used in the measurement of metal pipe wall thickness. However, there are also shortcomings in electromagnetic ultrasonic measurement: the ene...

AI Technical Summary

Problems solved by technology

However, there are also shortcomings in electromagnetic ultrasonic measurement: the energy conversion efficiency of electromagnetic ultrasonic measurement decays exponentially with the distance between the metal pipe and the electromagnetic ultrasonic sensor. Since the electromagnetic ultrasonic sensor detects the metal pipe as an arc surface, the eddy current induced by the electromagnetic ultrasonic sensor on the surface Area decreases significantly with distance, resulting in inefficient energy conversion

However, this device can only improve the measurement accuracy, but it cannot fit metal pipes of different specifications well to detect the wall thickness of metal pipes of different specifications, and the energy conversion efficiency is poor.

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