Optimization Technology for Ultrasound - Optimization Technology for Resonance Phenomena and Nonlinear Phenomena -

The Ultrasonic System Research Institute provides consulting services for the manufacturing and development methods of the "Deaeration Fine Bubble (Microbubble) Generation Liquid Circulation Device," which can efficiently control ultrasonic waves. "Deaeration Fine Bubble (Microbubble) Generation Liquid Circulation Device" 1) By narrowing the suction side of the pump, cavitation is generated. 2) Cavitation causes bubbles of dissolved gas to form. The above describes the state of the deaeration liquid circulation device. 3) When the concentration of dissolved gas decreases, the bubble size of the dissolved gas due to cavitation becomes smaller. 4) Through appropriate liquid circulation, fine bubbles (microbubbles) of less than 20μ are generated. The above describes the state of the deaeration microbubble generation liquid circulation device. 5) When ultrasonic waves are applied to the above-mentioned deaeration fine bubble (microbubble) generation liquid circulation device, the ultrasonic waves disperse and crush the fine bubbles (microbubbles). When measuring the fine bubbles (microbubbles), the distribution of ultra-fine bubbles exceeds that of fine bubbles. The above state indicates that ultrasonic waves can be stably controlled.

The Ultrasonic System Research Institute has developed a new acoustic flow control technology utilizing the nonlinear vibration phenomena of surface elastic waves. Regarding complex vibration states: 1) Linear phenomena and nonlinear phenomena 2) Interactions and the acoustic characteristics of various components 3) Sound, ultrasound, and surface elastic waves 4) Low frequency and high frequency (harmonics and subharmonics) 5) Oscillation waveforms and output balance 6) Oscillation control and resonance phenomena ... Based on the above, we optimize a new evaluation method for surface elastic waves using a statistical mathematical model based on sound pressure measurement data. Ultrasonic cleaning, processing, stirring, ... surface inspection, ... nanotechnology, ... applied research ... various responses are possible. Propagation characteristics of ultrasound: 1) Detection of vibration modes (changes in autocorrelation) 2) Detection of nonlinear phenomena (changes in bispectrum) 3) Detection of response characteristics (analysis of impulse response) 4) Detection of interactions (analysis of power contribution rates)

The Ultrasonic System Research Institute conducts consulting related to the use of ultrasound by applying feedback analysis technology based on multivariate autoregressive models, utilizing a technique for measuring, analyzing, and evaluating the propagation state of ultrasound. By organizing the measurements, analyses, and results obtained using ultrasonic testers in chronological order, we establish and confirm new evaluation criteria (parameters) that indicate the appropriate state of ultrasound for specific purposes. Note: Nonlinear characteristics (dynamic characteristics of acoustic flow), response characteristics, fluctuation characteristics, effects due to interactions, etc. By developing original measurement and analysis methods that consider the acoustic properties of the target object and surface elastic waves, we deepen our understanding of the relationships between various detailed effects related to vibrational phenomena, referencing statistical mathematical concepts. As a result, there is an increasing number of cases demonstrating the effectiveness of new nonlinear parameters related to the propagation state of ultrasound and the surface of the target object, such as changes in bispectrum and changes in autocorrelation. In particular, evaluation cases related to cleaning, processing, and surface treatment effects lead to successful control and improvement based on good confirmations.

Ultrasonic Cleaning (Control of Nonlinear Phenomena) Technology 1. Introduction This section introduces technologies that utilize the effects of acoustic flow related to ultrasound. Regarding ultrasonic cleaning, "The most important (effective) factor is acoustic flow." 2. What is Acoustic Flow? A flow occurs near the surface of the cleaning object placed in the ultrasonic cleaner. This flow is called acoustic flow. ... Propagation Characteristics of Ultrasound 1) Detection of Vibration Modes (Changes in Autocorrelation) 2) Detection of Nonlinear Phenomena (Changes in Bicoherence) 3) Detection of Response Characteristics (Analysis of Impulse Response) 4) Detection of Interactions (Analysis of Power Contribution Rate) Note: "R" is a free statistical processing language and environment. autcor: Function for analyzing autocorrelation bispec: Function for analyzing bicoherence mulmar: Function for analyzing impulse response mulnos: Function for analyzing power contribution rate