Transmitter for measuring ultrasonic cavitation intensity

Abstract

The invention discloses a transmitter for measuring ultrasonic cavitation intensity. The transmitter includes a sensor module, a power management module, a signal processing module, a control module,a communication module and an input and output module. The sensor module consists of a dual-hydrophone module based on a piezoelectric effect. The power management module includes an 8.5V power inputmodule and a 3.3V voltage conversion module. The signal processing module includes a voltage amplification module. The input and output module includes an input module and a 4-20 mA output module. Thecontrol module includes a filtering unit, a frequency measuring unit and a cavitation intensity measuring unit. The filtering unit includes removing singular items, filtering out Gaussian white noiseand colored noise and smoothing data. The frequency measuring unit uses a fast Fourier transform method. The double hydrophones provide a stable and reliable acquisition signal, and can simultaneously measure the cavitation sound pressure and the number of particle vibrations, and use a relevant formula to obtain an accurate result.

Description

technical field [0001] The invention belongs to the technical field of industrial measurement, and in particular relates to a transmitter for ultrasonic cavitation intensity measurement. Background technique [0002] With the development of ultrasonic technology, ultrasonic effect has been widely used in many industries, and cavitation intensity is one of the most important indicators of ultrasonic system. The mechanism of ultrasonic waves in liquids is relatively complex. The ultrasonic cavitation effect will generate a local high-temperature and high-pressure environment in the sound field. The double hydrophone converts the cavitation intensity into a signal that is easy to measure and transmit. It can be measured in the cavitation effect environment. The data carries a lot of noise information. The dual hydrophone module uses two hydrophones in opposite directions and close to each other to measure the sound pressure values ​​of two points, and indirectly obtains the cav...

AI Technical Summary

Problems solved by technology

The mechanism of ultrasonic waves in liquids is relatively complex. The ultrasonic cavitation effect will generate a local high-temperature and high-pressure environment in the sound field. The double hydrophone converts the cavitation intensity into a signal that is easy to measure and transmit. It can be measured in the cavitation effect environment. The data carries a lot of noise information. The dual hydrophone module uses two hydrophones in opposite directions and close to each other to measure the sound pressure values ​​of two points, and indirectly obtains the cavitation intensity through an algorithm; while the conventional hydrophone module The signal processing method of the cavitation effect has a simple way to obtain the signal with more interference, a simple processing algorithm, and relatively low measurement accuracy, which is difficult to meet the measurement requirements of the cavitation intensity measuring instrument on site

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