Ultrasonic propagation control technology at frequencies above 900 MHz due to oscillation below 20 MHz.

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 has developed a technology to adjust the ultrasonic propagation characteristics of ultrasonic elements (piezoelectric elements) based on measurement, analysis, and evaluation results regarding the propagation state of ultrasound, utilizing ultrasonic systems (sound pressure measurement, oscillation control). To utilize the surface acoustic waves of ultrasonic elements (piezoelectric elements) according to specific purposes, special surface treatments are applied to the element's surface. It allows for adjustments to the sound pressure level and frequency range of the propagating ultrasound. By achieving dynamic ultrasonic propagation control through the combination of ultrasound (oscillation control) and surface acoustic waves, it has evolved into an adjustment technology based on the characteristics derived from the analysis of sound pressure data. The key point is the optimization of oscillation conditions (waveform, output, frequency, variations, etc.) to enable efficient control of nonlinear phenomena caused by surface acoustic waves. As specific technologies mentioned above, we provide consulting services for system technologies that control nonlinear phenomena (bi-spectra) resulting from the interaction of ultrasound with tanks and tools, tailored to specific purposes (cleaning, stirring, processing, welding, surface treatment, stress relief treatment, inspection, etc.).

The Ultrasonic System Research Institute is applying and developing manufacturing technology for original ultrasonic probes. We have developed technology to control the nonlinear vibration phenomena of surface elastic waves through oscillation control techniques based on the acoustic characteristics of the probes, and we provide consulting services for various ultrasonic utilization technologies. The key point is the optimization of the ultrasonic propagation section (Note). Note: By relaxing and homogenizing surface residual stress, stable ultrasonic oscillation control becomes possible. Setting technology for oscillation control conditions: 1) Setting of oscillation waveforms corresponding to the vibration modes of devices and equipment. 2) Setting of sweep conditions corresponding to the vibration modes of devices and equipment. 3) Setting of output levels corresponding to the vibration modes of devices and equipment. To achieve this, it is important to evaluate the characteristics related to ultrasonic propagation conditions through operational verification of the ultrasonic propagation characteristics of the original probe (sound pressure level, frequency range, nonlinearity, dynamic characteristics, 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 (impulse response). 4) Detection of interactions (power contribution rate).

Dynamic control technology based on ultrasonic sound pressure measurement analysis The Ultrasonic System Research Institute has developed the following technologies: * Ultrasonic oscillation control technology (original product: ultrasonic oscillation control probe) * Measurement technology for ultrasonic propagation conditions (original product: ultrasonic tester) * Analysis technology for ultrasonic propagation conditions (nonlinear analysis system for time-series data) * Optimization technology for ultrasonic propagation conditions (optimization processing of sound and ultrasound) * Development and manufacturing technology for ultrasonic oscillation probes and propagation tools * Technology to control surface acoustic waves of systems By applying the above technologies, we have developed techniques to confirm and utilize the interaction of ultrasonic probes. This technology is based on measurement analysis of propagation conditions through oscillation control of ultrasound. As application examples of the developed technology, we have achieved effective utilization of ultrasound tailored to the conditions of various parts and materials (in air, underwater, in contact with elastic bodies, etc.) for purposes such as cleaning, surface modification, stirring, promoting chemical reactions, and vibration control in various systems.