Rotary-scanning online ultrasonic detection method for cylinders

A detection method, a rotary technology, applied in the direction of using sound waves/ultrasonic waves/infrasonic waves to analyze solids, etc., to improve detection efficiency and overcome time-consuming problems

Inactive Publication Date: 2015-07-22
吴从兵
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to overcome the defects in the prior art, the present invention proposes a rotary scanning cylinder ultrasonic online detection method, proposes a rotary scanning mode on the existing basis, rearranges the number of ultrasonic sensor positions, overcomes the spin of the spiral scanning The time-consuming problem caused by the simultaneous existence of work and progress can improve the detection efficiency

Method used

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  • Rotary-scanning online ultrasonic detection method for cylinders
  • Rotary-scanning online ultrasonic detection method for cylinders
  • Rotary-scanning online ultrasonic detection method for cylinders

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Embodiment

[0027] 1. Mode selection: When using plate waves for detection, in order to facilitate defect identification and detection, it is necessary to ensure that the sound wave propagating in the plate has a single mode and a stable speed as much as possible. For example: when the product of frequency and plate thickness is greater than 4MHz mm, the plate wave group velocity in A0 and S0 modes tends to be a constant, so when a 5MHz probe is used to detect a plate with a plate thickness of about 0.8mm, the plate wave group velocity will not increase significantly. The change. When A0 and S0 plate waves propagate in a uniform thin plate, the waveform will be a regular single-peak pulse, which is beneficial to the waveform identification during detection. From the plate wave equation:

[0028] 4 pq tan ( πfdq Cp ) + ( p ...

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Abstract

The invention discloses a rotary-scanning online ultrasonic detection method for cylinders. To-be-detected cylinders are placed in designated positions by a mechanical moving part; positions of transverse and longitudinal detection probes are adjusted, and longitudinal probe detects point-like and transverse surface-like defects, and the transverse probe detects point-like and longitudinal surface-like defects; ultrasonic frequency ranges are selected according to different cylinders; the cylinders are rotated for detection; positions and degrees of the defects are judged according to echo signals. With the adoption of the method, the detection efficiency is improved, and the cylinders made of different materials can be detected through change of acoustic resistance models and positions of sensors.

Description

technical field [0001] The invention belongs to the technical field of on-line detection based on ultrasonic waves, and in particular relates to a method for on-line ultrasonic detection of a rotary scanning cylinder. Background technique [0002] At present, foreign manufacturers with advanced technology and equipment in the field of automatic ultrasonic testing include Krautkramer Company in Germany, Panametrics Company in the United States, ABB Company, and Force Research Institute in Denmark; there are also more than a dozen domestic manufacturers of ultrasonic flaw detection equipment, such as Shantou Ultrasonic Instrument Research Institute, Shanghai Ultrasonic Instrument Factory, etc., but most of them belong to small and medium-sized enterprises, with relatively weak equipment and technical force, lack of independent research and development capabilities, and a large gap with foreign counterparts. [0003] Most of the existing "ultrasonic on-line inspection systems" ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/04
Inventor 吴从兵江海昕
Owner 吴从兵
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