A new surface inspection technology using megahertz ultrasonic oscillation.

The Ultrasonic System Research Institute, in collaboration with Nippon Barrel Industry Co., Ltd., is implementing a "plating method" utilizing ultrasound and fine bubbles for plating treatment. Utilization status of ultrasonic oscillation control probes: - Measurement analysis range: 1 Hz to 200 MHz - Oscillation range: 0.1 kHz to 25 MHz - Ultrasonic propagation range into the plating treatment tank: 5 kHz to over 200 MHz (analysis confirmed) - Oscillation equipment example: Function generator Oscillation method: - Control settings are made corresponding to the acoustic characteristics of the target object. - As a result, by controlling the original nonlinear resonance phenomenon, we achieve ultrasonic propagation states tailored to the purpose. Based on the measurement, analysis, and evaluation of ultrasonic propagation states, this is a new ultrasonic control technology for precision cleaning, processing, stirring, and inspection. By utilizing the acoustic characteristics (surface elastic waves) of various materials, ultrasonic stimulation can be controlled for several tons of structures and machine tools in a 3000-liter water tank with an ultrasonic output of less than 20 W. This was developed as an application method for nonlinear phenomena through an engineering (experimental and technical) perspective on elastic wave motion and an abstract algebraic ultrasonic model.

The Ultrasonic System Research Institute has developed an application technology based on Shannon's juggling theorem, using classification methods related to ultrasonic propagation phenomena derived from bispectral analysis results of ultrasonic sound pressure measurement data. Specifically, we have developed an original product: a "method for controlling the oscillation of megahertz ultrasonic waves" using an ultrasonic oscillation control system. This technology is offered through consulting proposals and implementation support. To utilize ultrasonic propagation phenomena stably and efficiently, it is necessary to examine the response characteristics and interactions related to conditions other than ultrasonic oscillation devices and ultrasonic transducers, as well as to develop dedicated tools. By examining the oscillation waveforms and control conditions of ultrasonic waves, we can discover new ultrasonic effects (Note 1: original nonlinear resonance phenomena). By utilizing ultrasonic phenomena primarily driven by nonlinear effects according to specific purposes, efficient ultrasonic utilization can be achieved. In particular, there has been an increase in achievements in nano-level ultrasonic technologies (stirring, cleaning, etc.). Note 1: Original nonlinear resonance phenomenon This phenomenon occurs due to the generation of harmonics resulting from original oscillation control, which is realized at high amplitudes through resonance phenomena, leading to ultrasonic vibration resonance phenomena.

The Ultrasonic System Research Institute has developed control technology for ultrasonic propagation states (nonlinear resonance phenomena) utilizing the combination of sound and ultrasound by applying the following technologies: - Design and manufacturing technology for ultrasonic systems - Control technology for cavitation and acoustic flow - Measurement, analysis, and evaluation technology for ultrasound Note: Original nonlinear resonance phenomenon The occurrence of harmonics generated by original oscillation control is realized at a high amplitude due to the resonance phenomenon, resulting in ultrasonic vibration resonance. As an application example of this technology, we provide consulting services for effective utilization of ultrasound (cleaning, modification, stirring, promoting chemical reactions, etc.) tailored to the state of various components and materials (in air, in water, in contact with elastic bodies, etc.). Ultrasonic propagation characteristics: 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) Note: "R" is a free statistical processing language and environment. autcor: autocorrelation analysis function bispec: bispectrum analysis function

The Ultrasonic System Research Institute has developed a megahertz ultrasonic oscillation control probe that enables the utilization of ultrasonic propagation states from 1 to over 900 MHz by combining it with a function generator for controlling ultrasonic propagation states. This is a new application technology for precision cleaning, processing, stirring, and inspection based on measurement, analysis, and evaluation techniques of ultrasonic propagation states. By utilizing the acoustic properties (surface elastic waves) of various materials, it is possible to control ultrasonic stimulation to several tons of structures and machine tools in a 3000-liter water tank with an ultrasonic output of less than 20W. It was developed as an application method for nonlinear phenomena through an engineering (experimental and technical) perspective on elastic waves and an abstract algebraic ultrasonic model. The key point is the utilization method of surface elastic waves. By confirming the ultrasonic propagation characteristics depending on the conditions of the target object (Note 1), it is important to address it as an original nonlinear resonance phenomenon. Note 1: Ultrasonic propagation characteristics 1) Detection of vibration modes (changes in self-correlation) 2) Detection of nonlinear phenomena (changes in bispectrum) 3) Detection of response characteristics 4) Detection of interactions