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Electromagnetic ultrasonic thickness gauge and measurement method thereof

An electromagnetic ultrasonic and thickness gauge technology, which is applied to measuring devices, using ultrasonic/sonic/infrasonic waves, instruments, etc., can solve the problems of large size and inconvenient use of the transducer, and achieve short magnetic field duration, high detection efficiency, Environmentally adaptable effect

Active Publication Date: 2011-05-04
零声科技(苏州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The electromagnet electromagnetic ultrasonic transducer in this patent uses U-shaped soft iron, and the transducer is large in size and inconvenient to use

Method used

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  • Electromagnetic ultrasonic thickness gauge and measurement method thereof
  • Electromagnetic ultrasonic thickness gauge and measurement method thereof
  • Electromagnetic ultrasonic thickness gauge and measurement method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1, combining figure 1 , an electromagnetic ultrasonic thickness gauge of the present invention, it is by microcontroller (1), transmitting circuit (2), electromagnetic ultrasonic probe (3), receiving switch (4), conditioning circuit (5), echo processing system (6), composed of a display system (7) and a keyboard (8), the microcontroller (1) is connected to the transmitting circuit (2), the transmitting circuit (2) is connected to the electromagnetic ultrasonic probe (3), and the electromagnetic ultrasonic probe (3) is connected to The receiving switch (4), the receiving switch (4) is connected to the microcontroller (1) and the conditioning circuit (5), the conditioning circuit (5) is connected to the echo processing system (6), and the display system (7) is connected to the microcontroller (1 ), the microcontroller (1) is connected to the keyboard (8).

[0029] The present invention also has the following technical characteristics:

[0030] The electromagn...

Embodiment 2

[0043] Example 2, combined with Figure 4 , the echo processing system (6) of the present invention comprises a data acquisition circuit (16), a storage circuit (17), a FIR band-pass filter (18), a correlation detector (19), a FIR low-pass filter (20), Echo position extraction circuit (21), round trip time generator (22); Data acquisition circuit (16) connects storage circuit (17), storage circuit (17) connects FIR band-pass filter (18), FIR band-pass filter (18) connect correlation detector (19), correlation detector (19) connects FIR low-pass filter (20), FIR low-pass filter (20) connects echo position extraction circuit (21), echo position extraction circuit (21) Connect the round trip time generator (22). The data acquisition circuit collects the signal into the memory, the FIR bandpass filter filters the signal to improve the signal-to-noise ratio, the correlation detector further processes the signal, extracts the envelope of the signal through the FIR low-pass filter, ...

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Abstract

The invention provides an electromagnetic ultrasonic thickness gauge for measuring the thickness of a specimen in a variety of abominable environments and a measurement method thereof. The electromagnetic ultrasonic thickness gauge is composed of a microcontroller, a transmitting circuit, an electromagnetic ultrasonic probe, a receiving switch, a conditioning circuit, an echo processing system, adisplay system and a keyboard, wherein the microcontroller is connected with the transmitting circuit which is connected with the electromagnetic ultrasonic probe, the electromagnetic ultrasonic probe is connected with the receiving switch which is connected with the microcontroller and the conditioning circuit, the conditioning circuit is connected with the echo processing system, and the display system is connected with the microcontroller which is connected with the keyboard. The electromagnetic ultrasonic thickness gauge uses a normal-incidence body wave to measure the thickness and achieves the measurement accuracy which is twice as high as that of piezoelectric ultrasonic thickness gauge at the same frequency. The electromagnetic ultrasonic probe which adopts a pulse electromagnet to offer magnetic field can effectively detect various metallic specimens; as a transceiving separated coil is used for exciting and detecting ultrasonic waves, the blind area for the measurement is small and the measurement thickness can be in a range from 3mm to 200mm.

Description

(1) Technical field [0001] The invention relates to ultrasonic thickness measurement technology, in particular to an electromagnetic ultrasonic thickness measurement instrument and a measurement method thereof. (2) Background technology [0002] Metal sheets inevitably have defects such as uneven thickness and pits during the production process, and various defects will also occur due to factors such as stress and corrosion during use. Plate thickness inspection is an effective method to find defects such as uneven thickness, corrosion, and pits. At present, pipeline transportation occupies an important position in the national economy, but with the increase of pipelines and the increase of pipe age, pipeline leakage accidents caused by corrosion, wear, accidental damage and other reasons occur from time to time, which seriously threaten the safety of life, property and ecological environment. Pipeline thickness detection plays an important role in the petroleum industry, c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B17/02
Inventor 王淑娟段伟亮张晓辉宫佳鹏信鹏皓康磊翟国富
Owner 零声科技(苏州)有限公司
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