Surface inspection technology using oscillation control of ultrasonic probes.

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

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)

Ultrasonic Oscillation System (20MHz Type) USP-2021-20MHz B-1 KKmoon Signal Generator 1 set Function Generator 200MSa/s 25MHz B-2 Original Initial Settings for KKmoon Signal Generator Simple Operation Manual B-3 Ultrasonic Oscillation Control Probes 2 pieces Ultrasonic Probe: Overview Specifications Measurement Range 0.01Hz to 200MHz Oscillation Range 0.5kHz to 25MHz Propagation Range 0.5kHz to over 900MHz (confirmed evaluation through analysis) Material Stainless Steel, LCP Resin, Silicon, Teflon, Glass... Oscillation Equipment Example Function Generator Recommended Settings Example ch1 Square Wave 47.1% (duty) 8.0MHz Output 13.4V ch2 Square Wave 43.7% (duty) 11.0MHz Output 13.7V Sweep Oscillation Conditions Square Wave 3MHz to 18MHz, 2 seconds Ultrasonic Propagation Characteristics 1) Detection of Vibration Modes (Changes in Self-Correlation) 2) Detection of Nonlinear Phenomena (Changes in Bicoherence) 3) Detection of Response Characteristics 4) Detection of Interactions

The Ultrasonic System Research Institute has developed technology to measure, analyze, and evaluate various interactions by analyzing time-series data through ultrasonic sound pressure measurements. As a result, it has evolved into a technology that optimizes ultrasonic utilization conditions based on interaction evaluations. Specifically, there are the following examples: 1) Optimization of selection criteria for ultrasonic oscillation frequency and output level 2) Optimization of ultrasonic oscillation control conditions 3) Optimization regarding the installation of tanks and ultrasonic (transducers) 4) Optimization of liquid circulation devices and control conditions 5) Optimization of design conditions for tanks and ultrasonic systems 6) Optimization of cleaning solutions, detergents, solvents, etc. 7) Optimization with adjacent tanks, jigs, etc. It is possible to develop original ultrasonic systems tailored to specific purposes. 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 bispec: bispectrum mulmar: impulse response mulnos: power contribution rate