Ultrasonic outside pressure detection device and its method

A detection device and ultrasonic technology, applied in the direction of fluid pressure measurement using acoustic methods, can solve the problems of low sensitivity, low precision, limited time measurement resolution, and inability to achieve quantitative measurement.

Inactive Publication Date: 2003-09-24
李艾华
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Problems solved by technology

The stress sensing method is based on the basic principle of radial elastic deformation of metal pipes under the action of liquid pressure. The internal working pressure of the pipe can be calculated by detecting the small deformation of the outer diameter of the pipe. The sensitivity, accuracy and other indicators of this pressure measurement method are all It is very low; the ultrasonic echo displacement method is the first of the Second Artillery Engineering College, which uses the ultrasonic probe as the sensing element according to the physical characteristic of the change of the sound velocity of the fluid caused by the press

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  • Ultrasonic outside pressure detection device and its method
  • Ultrasonic outside pressure detection device and its method
  • Ultrasonic outside pressure detection device and its method

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[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0036] see figure 1 , the present invention includes the ultrasonic transceiver card 2 and the data acquisition card 3 inserted in the slot of the industrial control machine 1 base plate based on the ISA bus. TRA of device 8 emits ultrasonic pulses, and TRB does not emit ultrasonic pulses. After a period of time, TRA and TRB receive echoes and transmit ultrasonic signals. While connecting the ultrasonic transmitting circuit, the industrial control machine 1 sends a control signal, and the data acquisition card 3 works to automatically complete the ultrasonic signal acquisition at a sampling rate of 40MSPS, and store the data in a 64K×8 high-speed cache for real-time recording. All signals appearing on the TRA and TRB of the ultrasonic direct transducer 8. After a signal acquisition is completed, the data is sent to the industrial control computer 1 for anal...

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Abstract

The present invention relates to an ultrasonic pipe exterior pressure delection equipment and method, including ultrasonic transmitting and receiving card and data collecting card which are based on ISA bus and inserted into the slot of bottom plate of industrial control machine. TRA and TRB of ultrasonic transducer are perpendicularly mounted on ouer pipe wall in 180 deg. and under the control of industrial control machine only the TRA of ultrasonic transducer can be used to transmit the ultrasonic signal, and the TRA and TRB can be used for respectively receiving echo-penetrated ultrasonic signal, said signal can be fed into input end of data collecting card, and analyzed and processed by industrial control machine so as to implement time difference and pressure calcutation.

Description

1. Technical field [0001] The invention relates to an ultrasonic tube external pressure detection device and method, in particular to a small diameter tube external pressure detection device and method. 2. Background technology [0002] The research on non-invasive pressure measurement is in the immature and exploratory stage, and there are two methods, the stress sensing method and the ultrasonic echo displacement method. The stress sensing method is based on the basic principle of radial elastic deformation of metal pipes under the action of liquid pressure. The internal working pressure of the pipe can be calculated by detecting the small deformation of the outer diameter of the pipe. The sensitivity, accuracy and other indicators of this pressure measurement method are all It is very low; the ultrasonic echo displacement method is the first of the Second Artillery Engineering College, which uses the ultrasonic probe as the sensing element according to the physical charac...

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Application Information

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IPC IPC(8): G01L11/04G01L11/06
Inventor 李艾华杨金岩黄轶王爱明曹小平
Owner 李艾华
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