Ultrasonic Transducer Frequency Isolation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ultrasonic devices for both transmission and reception suffer from deteriorated performance due to mechanical crosstalk between transmitter and receiver ultrasonic elements, and the use of intercepting slits to mitigate this issue complicates the structure and reduces mechanical strength.
Innovation Solution
The ultrasonic device features a substrate with a transmitter and receiver configured to operate at different resonance frequencies, where the transmitter's resonance frequency is higher than the receiver's, and the receiver's anti-resonance frequency is within the frequency band corresponding to the transmitter's resonance frequency, thereby reducing mechanical crosstalk without the need for intercepting slits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If an intercepting slit is provided between ultrasonic elements to prevent mechanical crosstalk, then mechanical crosstalk is reduced, but device structure becomes complicated and mechanical strength is reduced
Solution Approach 1:
The patent changes the frequency parameters of the ultrasonic elements by setting different resonance frequencies for transmitters and receivers. The transmitter operates at a resonance frequency that coincides with the receiver's anti-resonance frequency, creating frequency selectivity that prevents mechanical crosstalk without requiring physical intercepting slits. This parameter-based solution avoids the structural complications and strength reductions associated with physical barriers.
2Object-affected harmful factors
If an intercepting slit is provided between ultrasonic elements to prevent mechanical crosstalk, then mechanical crosstalk is reduced, but mechanical strength is reduced
Solution Approach 1:
The patent uses frequency parameter differentiation where the transmitter's resonance frequency is set to match the receiver's anti-resonance frequency. This creates a frequency-based isolation mechanism that prevents mechanical crosstalk without introducing physical slits that would compromise the mechanical strength of the ultrasonic device structure.
3Device complexity
If transmitter and receiver operate at the same frequency, then device structure is simple, but transmission and reception performance is deteriorated due to mechanical crosstalk
Solution Approach 1:
The patent introduces frequency parameter differentiation between transmitter and receiver operations. The transmitter operates at a resonance frequency that corresponds to the receiver's anti-resonance frequency, creating frequency selectivity that prevents mechanical crosstalk. This parameter change maintains structural simplicity while significantly improving transmission and reception performance.
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
This configuration effectively reduces mechanical crosstalk, ensuring suitable transmission efficiency and reception sensitivity while maintaining a simple and strong device structure.
Implementation Method 1
A resonance frequency of the transmitter is higher than a resonance frequency of the receiver
Implementation Method 2
An anti-resonance frequency of the receiver is included in a frequency band corresponding to the resonance frequency of the transmitter
Data Source
AI summary
An ultrasonic device includes a substrate, a transmitter provided at the substrate and configured to transmit an ultrasonic wave to an object, and a receiver provided at a position different from the transmitter at the substrate and configured to receive an ultrasonic wave reflected by the object. A resonance frequency of the transmitter is higher than a resonance frequency of the receiver. An anti-resonance frequency of the receiver is included in a predetermined frequency band including the resonance frequency of the transmitter.