Surface residual stress relaxation treatment technology for ultrasonic transducers (consulting support)

The Ultrasonic System Research Institute, in collaboration with Japan Barrel Industry Co., Ltd., is implementing a "plating method" utilizing ultrasound and fine bubbles for plating treatment. Ultrasonic Probe: Outline Specifications - Measurement Range: 0.01 Hz to 200 MHz - Oscillation Range: 1.0 kHz to 25 MHz - Propagation Range: 0.5 kHz to over 900 MHz - Materials: Stainless steel, LCP resin, silicon, Teflon, glass, etc. - 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, ultrasonic propagation states tailored to the purpose are realized. Based on the measurement, analysis, and evaluation of ultrasonic propagation states, this is a new ultrasonic control technology for precision cleaning, processing, stirring, inspection, etc. <Patent Applications Filed> Patent Application No. 2021-161532: Ultrasonic Plating Patent Application No. 2021-171909: Ultrasonic Processing Patent Application No. 2021-175568: Flow-type Ultrasonic Cleaning Patent Application No. 2023-195514: Ultrasonic Plating Utilizing Megahertz Ultrasound and Fine Bubbles

--- Dynamic Control Model of Ultrasound --- << About the Concept >> The Ultrasound Research Institute has developed a model of the state, including phenomena related to the nonlinearity of ultrasound, as a Monoid model in abstract mathematics (category theory). Based on this idea, we are developing and applying specific methods for ultrasound control as a spectral series of knot theory. The control methods adapted to ultrasound phenomena optimize the dynamic changes of cavitation and acoustic flow (acceleration phenomena) according to the intended purpose by feedback analyzing sound pressure measurement data with an autoregressive model. From previous cases and achievements, we have developed techniques for classifying nonlinear phenomena (harmonics, downshifting). Through logical models, we classify effective propagation (utilization) states of ultrasound and realize dynamic control tailored to specific objectives. Ultrasound 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 has developed a technology that efficiently alleviates surface residual stress in components by controlling the nonlinear propagation state of ultrasound, utilizing the acoustic characteristics of the target objects through measurement, analysis, and control techniques related to the propagation state of ultrasound. With this technology to alleviate surface residual stress, it has become possible to improve the fatigue strength against metal fatigue. In particular, by considering the guided waves (surface elastic waves) of the target object in the settings of the ultrasound propagation state, we have developed control methods and tools that realize effective nonlinear stimulation to the target object. We have confirmed a wide range of effects on various types of metal parts, resin parts, and powder materials. This technology is offered as a consulting service. Ultrasound 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)

- Technology for controlling nonlinear ultrasonic phenomena, enabling nano-level stirring, emulsification, dispersion, and grinding techniques - The Ultrasonic System Research Institute has developed stirring (emulsification, dispersion, grinding) technology utilizing the megahertz ultrasonic propagation phenomenon through the control of nonlinear ultrasonic phenomena (acoustic flow). This technology controls ultrasonic (cavitation, acoustic flow) by utilizing (evaluating) the ultrasonic propagation characteristics (analysis results) of indirect containers, ultrasonic water tanks, and other items through surface inspection. Furthermore, it realizes effective ultrasonic (cavitation, acoustic flow) propagation states tailored to the structure, material, and acoustic characteristics of specific target objects, achieved through the interaction of glass containers, ultrasound, and target objects, by controlling ultrasonic oscillation. In particular, the dynamic characteristics of harmonics through acoustic flow control enable responses at the nano level.