Ultrasonic cleaning machine acoustic flow control system (consulting support)

The Ultrasonic System Research Institute has developed a liquid circulation technology for ultrasonic cleaners that utilizes the "Constructal Law" related to flow and shape (control of nonlinear phenomena). This was developed with inspiration from observations of river flows, as shown in the attached photo. Regarding the use of ultrasound, we believe that through our experience in observing flow, we can intuitively grasp acoustic flow (a nonlinear phenomenon of ultrasound). Acoustic flow <General Concept> When finite amplitude waves propagate through a gas or liquid, acoustic flow occurs. Acoustic flow is a unidirectional steady flow of matter that arises either as a result of viscous losses from wave pulses in a free inhomogeneous field, or in the vicinity of obstacles (cleaning objects, fixtures, liquid circulation) within an acoustic field, or near vibrating bodies due to inertial losses. Using the above as a reference and hint, we organize the technology for measuring, analyzing, evaluating, and utilizing (controlling) "nonlinear phenomena" in ultrasonic propagation phenomena through the "Constructal Law," which improves flow, thereby consolidating it into ultrasonic technology.

The Ultrasonic System Research Institute has developed a new technology for controlling standing waves through the installation method of ultrasonic transducers, enabling the control of cavitation and acceleration (acoustic flow) effects. With this technology, it is possible to stir, atomize, clean, and modify liquids ranging from 300 to 6000 liters, which require a large amount of energy. - Application examples of the developed technology - Stirring and dispersing nano-level catalysts in solvents (stirring and dispersing carbon nanotubes in plating solutions and paints). Achieving appropriate ultrasonic irradiation for cleaning targets with varying adhesion strengths due to multiple contaminants, or for surface modification of complex-shaped parts. The most effective examples include surface modification of metal and resin parts and materials (relaxation of residual stress). 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)

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.

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