Dual-element combined high-frequency sinusoidal pressure generator and pressure generation method

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 metering and testing, and relates to a high-frequency sinusoidal pressure generator and a pressure generating method based on a combination of dual-element piezoelectric transducers. Background technique [0002] The piezoelectric transducer is the main core component of the sinusoidal pressure dynamic calibration. Using the principle of hydraulic pipeline resonance, a sinusoidal voltage is applied to the piezoelectric transducer installed at the bottom of the hydraulic pipeline, and the excitation voltage will be generated on the surface of the piezoelectric transducer. The 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 amplitude sinusoidal pressure is obtained at one...

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

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