Variable-Impedance Ultrasonic Transmission Member for Wideband Transfer
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Solution Overview
Problem
Existing ultrasonic transmission technologies face challenges in transmitting waves through obstacles due to significant energy reflection caused by impedance differences, with existing methods like Fabry-Perot resonance being limited by frequency and offering low transmittance across a wide frequency band.
Innovation Solution
An ultrasonic transmission apparatus and method that adjusts the position and impedance of an ultrasonic transmission member relative to an obstacle, using specific phase and impedance ratios to achieve phase and magnitude matching, allowing for 100% transmittance regardless of obstacle type or thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Fabry-Perot resonance is used to transmit ultrasonic waves through an obstacle, then transmission energy is maximized at specific frequencies, but transmittance is very low across a wide frequency band
Solution Approach 1:
The patent employs a variable impedance transmission member whose acoustic impedance can be dynamically adjusted to match different obstacle impedances. This dynamic adaptability allows the system to maintain high transmittance across varying frequencies and obstacle types, resolving the contradiction between optimized energy transmission at specific frequencies and broad frequency band versatility.
Solution Approach 2:
The invention changes the impedance parameter of the ultrasonic transmission member to match the impedance of the obstacle. By adjusting this physical parameter, the system achieves maximum transmittance across a wide frequency range rather than being limited to specific resonant frequencies, thus resolving the contradiction between frequency-specific optimization and broad frequency adaptability.
2Object-generated harmful factors
If an ultrasonic wave encounters an obstacle with large impedance difference, then reflection increases, but transmission through the obstacle becomes possible with impedance matching
Solution Approach 1:
The patent introduces an ultrasonic transmission member as an intermediary between the ultrasonic wave source and the obstacle. This intermediate element has adjustable impedance that can be matched to both the medium and the obstacle, thereby reducing reflection and enabling efficient energy transmission. The intermediary resolves the contradiction by providing a gradual impedance transition rather than a direct interface between dissimilar media.
Solution Approach 2:
The invention changes the impedance parameter of the transmission member to optimize the energy transfer. By adjusting this physical parameter, the system minimizes reflection (harmful factor) while maximizing transmitted energy, thus resolving the contradiction between reducing reflection and maintaining energy transmission.
3Device complexity
If a fixed impedance transmission member is used, then the device structure is simple, but transmittance is limited for different obstacle types and thicknesses
Solution Approach 1:
The patent employs a variable impedance transmission member whose acoustic impedance can be dynamically adjusted to match different obstacle impedances. This dynamic adaptability allows the system to maintain high transmittance across varying frequencies and obstacle types, resolving the contradiction between optimized energy transmission at specific frequencies and broad frequency band versatility.
Solution Approach 2:
The invention creates a universal transmission member that can adapt to multiple obstacle types and thicknesses through impedance adjustment. This multi-functional capability allows a single device to effectively transmit ultrasonic waves through various obstacles without requiring separate optimized components for each obstacle type, thus resolving the contradiction between structural simplicity and adaptability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus enables high-energy ultrasonic wave transmission through obstacles with minimal reflection, applicable in underwater, medical, and non-destructive inspection scenarios.
Implementation Method 1
a phase and a magnitude of a transmitted wave passing through the ultrasonic transmission member and the obstacle to be the same as a phase and a magnitude of the incident wave
Implementation Method 2
a ratio β between impedance of the obstacle and impedance of the ultrasonic transmission member are defined according to following Equation (1)
Implementation Method 3
a position variable device configured to vary a position of the ultrasonic transmission member
Implementation Method 4
an ultrasonic generation device configured to generate an incident wave
Data Source
AI summary
The present disclosure relates to an ultrasonic transmission apparatus and a wave control method, and more particularly, to an ultrasonic transmission apparatus and a wave control method which enable an ultrasonic wave to transmit through an obstacle.