Oil and gas pipeline online stress ultrasonic measuring device

Abstract

The invention relates to an oil-gas pipeline online stress ultrasonic measurement device which comprises a processor, an ultrasonic transmitting module, an ultrasonic receiving module, a time measuring circuit module, a liquid crystal display and interaction module, and a power management module. The ultrasonic transmitting module transmits a high-voltage pulse. The ultrasonic receiving module receives signal waveform amplifying and shaping. The time measuring circuit module measures the time interval between a start signal and an end signal of ultrasonic transmission. The liquid crystal display and interaction module is used for system management and measurement result display. The power management module supplies power to the processor, the ultrasonic transmitting module, the ultrasonic receiving module, the time measuring circuit module and the liquid crystal display and interaction module. The processor is used for managing the system, controlling the power supply, collecting a measurement result, processing the measurement result and making the result displayed. The detection accuracy is improved. Electromagnetic interference is prevented. The system can work in the field continuously, steadily and stably for a long time. External interference is isolated. The measurement result is real and reliable.

Description

technical field [0001] The invention belongs to the field of stress detection of oil and gas pipelines, and in particular relates to an ultrasonic measuring device for on-line stress of pipeline steel metal. Then calculate the stress size inside the metal. The measuring device is compact, can realize non-destructive testing, and has high measurement accuracy and fast measurement speed. technical background [0002] With the increasing demand for oil and natural gas at home and abroad, oil and gas pipelines are developing in the direction of large diameter, high pressure, high strength and high design coefficient, but as the service life increases year by year, pipeline defects also increase. Oil and gas pipelines into an accident-prone phase. In all oil and gas pipeline equipment, metals are subjected to significant loads. The magnitude and change of the internal stress of these pipelines are the main reference indicators to measure their reliability. The change in the i...

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Problems solved by technology

[0003] However, the traditional ultrasonic stress measurement device is relatively large and cannot be hand-held. The measurement method is generally to sample and measure the signal. Its low sampling frequency determines its low measurement accuracy. can only reach 10 -8 -10 -9 S

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