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High-frequency sinusoidal pressure generator of double-element combination type, and pressure generation method

A combination and generator technology, applied in the direction of measuring fluid pressure, instruments, measuring devices, etc., can solve the problem of not being able to obtain the ideal output response, and achieve the effect of facilitating later maintenance and replacement, simple and stable structure, and high frequency

Active Publication Date: 2018-12-11
BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing high-frequency sinusoidal pressure generator basically uses a single piezoelectric transducer placed at the bottom to generate a sinusoidal pressure signal, but the piezoelectric transducer is limited by its own structure and the anti-resonance point of the entire device, so it is difficult to use it in ( 1~30)kHz frequency range has relatively good output response, especially in the (6~30)kHz high frequency range can not get the ideal output response

Method used

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  • High-frequency sinusoidal pressure generator of double-element combination type, and pressure generation method
  • High-frequency sinusoidal pressure generator of double-element combination type, and pressure generation method
  • High-frequency sinusoidal pressure generator of double-element combination type, and pressure generation method

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Embodiment 1

[0042] The dual-element combined high-frequency sinusoidal pressure generator disclosed in this embodiment includes a hydraulic pipeline 1, a top piezoelectric transducer 2, a bottom piezoelectric transducer 3, a pressure controller 4, a pressure measuring cavity 5, and a signal generator 6. The top power amplifier 7, the bottom power amplifier 8.

[0043] The hydraulic pipeline 1 is a hollow cylindrical structure, filled with liquid medium, the bottom is fixedly connected to the bottom piezoelectric transducer 3, the top is fixedly connected to the top piezoelectric transducer 2, and the center is fixedly connected to the pressure measuring chamber 5;

[0044] The hydraulic pipeline 1, the top piezoelectric transducer 2 and the bottom piezoelectric transducer 3 have the following relationship:

[0045] The top piezoelectric transducer 2 and the bottom piezoelectric transducer 3 are jointly affected by the signal generator 6, the top power amplifier 7, and the bottom power amplifier ...

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Abstract

The invention discloses a high-frequency sinusoidal pressure generator of a double-element combination type, and a pressure generation method, and belongs to the technical field of metering and testing. The high-frequency sinusoidal pressure generator comprises a hydraulic pipe, a top piezoelectric transducer, a bottom piezoelectric transducer, a pressure controller, a pressure measurement chamber, a signal generator, a top power amplifier, and a bottom power amplifier. The invention also discloses a high-frequency sinusoidal pressure generation method implemented based on the high-frequency sinusoidal pressure generator. The high-frequency sinusoidal pressure generator can generate a higher pressure amplitude value in the frequency range of 1-30kHz, so as to meet the demands of the calibration of an increasing number of dynamic pressure sensors. The demands of the calibration of the dynamic pressure sensors comprise the calibration demands of the dynamic pressure sensors in a development process of an engine, bullets and high-speed trains in the range of 1-30kHz. The high-frequency sinusoidal pressure generator has the following advantages that the calibration range is large; theamplitude is higher, and the frequency is higher; the signal is stable; and the later maintenance and replacement are facilitated.

Description

Technical field [0001] The invention belongs to the technical field of measurement and testing, and relates to a high-frequency sinusoidal pressure generator based on a combination of dual-element piezoelectric transducers and a pressure generation method. Background technique [0002] Piezoelectric transducer is the main core component of sinusoidal pressure dynamic calibration. Using the principle of hydraulic pipeline resonance, sinusoidal voltage is applied to the piezoelectric transducer installed at the bottom of the hydraulic pipeline, and an excitation voltage is generated on the surface of the piezoelectric transducer A sinusoidal displacement with the same frequency. This displacement forces the liquid medium in the hydraulic pipeline to transmit a sinusoidal pressure wave of the same frequency. When the excitation frequency is consistent with the resonance frequency of the hydraulic pipeline, a larger sinusoidal pressure can be obtained at one end of the hydraulic pipel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L27/00
CPCG01L27/005
Inventor 李博杨军黄日恒
Owner BEIJING CHANGCHENG INST OF METROLOGY & MEASUREMENT AVIATION IND CORP OF CHINA
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