Capacitance principle-based online rapid micro oil film thickness calibration system and method

A technology of oil film thickness and principle, applied in the field of online rapid calibration system, can solve the problem that the sensor cannot be pre-calibrated

Pending Publication Date: 2019-04-02
善测(天津)科技有限公司
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Problems solved by technology

The change of the medium makes the sensor unable to achieve pre-calibration

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  • Capacitance principle-based online rapid micro oil film thickness calibration system and method
  • Capacitance principle-based online rapid micro oil film thickness calibration system and method
  • Capacitance principle-based online rapid micro oil film thickness calibration system and method

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Embodiment Construction

[0026] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0027] The present invention provides a miniature oil film thickness on-line rapid calibration system based on the principle of capacitance, including a test piece 2, a capacitance sensor 1, a signal conditioning module 4, an integrated processing host 5 and a computer 6, and the capacitance sensor 1 is installed on the test piece 2 and coated with There is a layer of surface streamline repair agent formed with a filling coating 3, the capacitive sensor 1 is connected to the signal conditioning module 4 through the sensor signal line, the signal conditioning module 4 is placed in the integrated processing host 5, and the integrated processing host 5 is connected through RS-422 or USB ...

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Abstract

The invention discloses a capacitance principle-based online rapid micro oil film thickness calibration system and method. The system comprises a test piece, a capacitive sensor, a signal conditioningmodule, an integrated processing host and a computer, wherein the capacitive sensor is mounted on the test piece and is coated with a layer of surface streamline repair agent to form a fill coating;the capacitive sensor is connected with the signal conditioning module through a sensor signal line; the signal conditioning module is placed in the integrated processing host; and the integrated processing host is connected with the computer through an RS-422 or USB communication line. The system is capable of solving the problem of how to improve the calibration accuracy when the thicknesses ofoil films on the wall surfaces of aircraft are measured by the capacitive sensor in wind tunnel experiments; and through the system, online rapid and correct calibration schemes can be designed so asto obtain oil film thickness correction curves.

Description

technical field [0001] The invention belongs to the technical field of capacitive precision measurement, and in particular relates to an online rapid calibration system and method of a miniature oil film thickness measurement sensor based on the principle of capacitance. Background technique [0002] In the field of aerospace, aircraft are gradually developing towards supersonic and hypersonic speeds. A breakthrough in this field will have a significant and far-reaching impact on the improvement of my country's comprehensive national strength. The aerodynamic drag suffered by the aircraft is mainly composed of pressure differential resistance and frictional resistance. Among them, the research on pressure differential resistance has been relatively perfect in theory and numerical simulation. [0003] With the gradual increase of the flight Ma number and height of hypersonic vehicles, frictional resistance has become one of the main parameters to measure the aerodynamic perf...

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Application Information

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IPC IPC(8): G01B7/06G01M9/06
CPCG01B7/085G01B21/042G01M9/065
Inventor 李杨宗段发阶叶德超周琦
Owner 善测(天津)科技有限公司
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