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Pressure probe for measuring fluid pulse dynamic pressure

A pulse and pressure technology, applied in the direction of fluid pressure measurement using piezoelectric devices, can solve the problems of strong interference signal strength, high frequency, and no high-speed flow medium to measure local pressure contact probes

Active Publication Date: 2020-10-20
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, measuring the local dynamic pressure of high-speed flowing media needs to overcome the challenges of high frequency, strong interference and low signal strength
There are currently no contact probes specifically for measuring local pressure in high-velocity flowing media

Method used

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  • Pressure probe for measuring fluid pulse dynamic pressure
  • Pressure probe for measuring fluid pulse dynamic pressure

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Embodiment Construction

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only for illustration and are not intended to limit the present invention.

[0021] The present invention provides a pressure probe for measuring fluid pulse dynamic pressure, such as figure 1 with figure 2 as shown, figure 2 for figure 1 The sectional view, including: quartz glass sheet 1, piezoelectric sensor 2, glass tube 3, PTFE piston 4, terminal positive pole 5 and terminal negative pole 6; wherein,

[0022] The piezoelectric sensor 2 includes a piezoelectric ceramic 7 and a piezoelectric ceramic positive electrode 8 and a piezoelectric ceramic negative electrode 9 respectively located on the front and back sides of the piezoelectric ceramic 7;

[0023] The piezoelectric sensor 2 is located in the glass tube 3, the s...

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Abstract

The invention discloses a pressure probe for measuring fluid pulse dynamic pressure. The pressure probe is used for measuring the local pressure of a high-speed flowing medium in a pulse form. Contacttype pressure parameter measurement is achieved in a sealed piezoelectric ceramic mode, compared with a traditional pressure sensor, the pressure probe has the advantages that the size is small, theportable probe with changeable measuring points can be achieved, it can be guaranteed that the pressure probe influences flowing of a measured medium as little as possible, and compression waves are avoided. Piezoelectric ceramic is sealed and bonded by smearing a conductive silver adhesive on the end surface of a glass tube, so that the conductivity can be greatly increased, and the high signal-to-noise ratio of a weak piezoelectric signal is ensured. A voltage signal is led out by coating the conductive silver paint on the inner wall of the glass tube, and compared with a traditional wire, the pressure probe has the advantages that good sealing of the piezoelectric ceramic can be guaranteed, and the high signal-to-noise ratio of the led-out voltage signal can also be guaranteed. A quartzglass sheet with hard texture is selected to be in contact with an incoming flow medium, so that the pressure probe has good compression resistance and wear resistance, and the service life of the pressure probe can be ensured.

Description

technical field [0001] The invention relates to the technical field of fluid mechanics measurement, in particular to a pressure probe for measuring fluid pulse dynamic pressure. Background technique [0002] Contact measurement is a method that uses the interaction between the measured medium and the measuring object after contact and collision, and obtains the characteristic parameters of the measured medium according to the corresponding action mechanism and calculation model. The contact measurement method has the advantages of high spatial resolution, calibration and high precision, and has a wide range of applications in the field of fluid and plasma diagnosis, such as Langmuir probes, Faraday probes and retardation energy analyzers. At present, the measurement method of contact probe has been widely used in the measurement fields of fluid, magnetic fluid and combustion. [0003] Traditional probes are usually electrostatic, and the measurement parameters are generally...

Claims

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Application Information

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IPC IPC(8): G01L9/08
CPCG01L9/08
Inventor 汤海滨章喆许舒婷张尊
Owner BEIHANG UNIV
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