A 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 flowing medium to measure local pressure contact probes, etc., and achieve high signal-to-noise ratio , small size, good compression effect

Active Publication Date: 2021-07-16
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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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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  • A pressure probe for measuring fluid pulse dynamic pressure
  • A 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 and 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 su...

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Abstract

The invention discloses a pressure probe for measuring fluid pulse dynamic pressure, which is used for measuring the local pressure of high-speed flowing medium in the form of pulse, and adopts the method of sealing piezoelectric ceramics to realize contact pressure parameter measurement, which is different from traditional pressure sensors. Compared with the small size, it can not only realize the portable probe that can change the measuring point, but also ensure that the pressure probe affects the flow of the measured medium as little as possible, and avoids the generation of compression waves. The piezoelectric ceramics can be sealed and bonded by applying conductive silver glue on the end surface of the glass tube, which can greatly increase the conductivity and ensure a high signal-to-noise ratio for weak piezoelectric signals. The voltage signal is drawn out by smearing conductive silver paint on the inner wall of the glass tube. Compared with the traditional wire, it can not only ensure the good sealing of the piezoelectric ceramic, but also ensure the high signal-to-noise ratio of the voltage signal drawn out. The hard quartz glass sheet is selected to be in contact with the flowing medium, which has good resistance to compression and wear resistance, and can ensure the service life of the pressure probe.

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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Patent Type & Authority Patents(China)
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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