Nonlinear oscillation control technology for ultrasonic probes based on sound pressure measurement analysis.

<The Reality of Cleaning> 1: Managing cleaning equipment and cleaning solutions is difficult. In the case of cleaning devices that utilize vibrational phenomena as a physical action, the low-frequency vibrational phenomena caused by the installation of the device, along with the device's inherent vibrational phenomena, and the vibrational phenomena of the objects being cleaned and tools interact with each other, resulting in a complex change in the vibrational state. In many cases where cleaning effects are observed, nonlinear vibrational phenomena occur. To confirm nonlinearity and manage it, logical learning and an understanding of vibration measurement are necessary. As for the chemical action of cleaning solutions, in devices that utilize cleaning effects, managing the concentration of detergents is important, but measuring the concentration distribution within the tank is a challenging situation. Various distributions change due to interactions with the environment, such as liquid temperature, humidity, air temperature, and atmospheric pressure. In particular, the distribution of dissolved gas concentration has a significant impact on chemical reactions, but no methods are known to achieve uniform dissolved gas concentration. (Using the diffusivity of fine bubbles is one method.) If detergents are added but only increase the variability of the concentration distribution, it will result in greater variability in cleaning results. ....

The Ultrasonic System Research Institute has developed an ultrasonic oscillation control probe using components coated with iron on polyimide film. By applying this technology, we provide consulting services for "ultrasonic and vibration measurement, propagation control..." for various curved surfaces. Ultrasonic Probe: Overview Specifications Measurement Range: 0.01 Hz to 100 MHz Oscillation Range: 1 kHz to 25 MHz Propagation Range: 1 kHz to over 900 MHz Materials: Stainless steel, LCP resin, silicon, Teflon, glass... Oscillation Equipment Example: Function Generator By understanding the acoustic characteristics of the target object and installation conditions, we have achieved dynamic control of surface elastic waves (propagation state). We realize propagation states tailored to various purposes (cleaning, stirring, etc.). 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 (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.).

--- Control of Chemical Reactions through Nonlinear Ultrasonic Phenomena --- The Ultrasonic System Research Institute has developed an experimental device for controlling chemical reactions using ultrasonic waves by utilizing the technology to control nonlinear ultrasonic phenomena (acoustic flow). This technology controls ultrasonic waves (cavitation and acoustic flow) tailored to specific purposes by measuring and confirming the interactions within the container and through ultrasonic control using a megahertz ultrasonic oscillation probe. Note: Ultrasonic Control By setting the oscillation conditions for sweep oscillation and pulse oscillation using two types of nonlinear resonant ultrasonic oscillation probes, it dynamically controls high-frequency propagation states above 30 MHz through high sound pressure resonance phenomena and harmonic generation phenomena (nonlinear phenomena). Note: Ultrasonic Control "Precision Cleaning Example" Sweep Oscillation: 70 kHz - 15 MHz, 15 W Pulse Oscillation: 13 MHz, 8 W In particular, the dynamic characteristics of harmonics through acoustic flow control enable reactions and responses at the nano level. This has been applied and developed from the example of dispersing metal powder to nanosize.