Multi-mode Transducer Impedance Estimation with Interference Correction
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Solution Overview
Problem
Existing methods for estimating equivalent model parameters of multi-mode transducers fail to accurately consider interference effects between adjacent resonant modes, leading to significant estimation errors and complex calculations, especially when resonant modes have varying impedance contributions.
Innovation Solution
A method that estimates individual mode impedances and total mode impedances from multi-mode impedance data, accounting for interference effects between adjacent modes, using a process that includes resonant frequency derivation, individual mode impedance estimation, multi-mode impedance estimation, interference effect quantification, and resonant frequency correction to minimize errors and improve accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an optimization method is applied to estimate equivalent model parameters from impedance data, then the estimation can be performed, but complex calculation is required to derive initial values and the estimation result is largely dependent on the initial value
Solution Approach 1:
The patent segments the multi-mode impedance estimation problem into two distinct stages: first estimating individual mode impedances by removing interference effects, then estimating total mode impedance considering combined effects. This segmentation eliminates the need for complex optimization and initial value derivation, directly resolving the contradiction between estimation accuracy and calculation complexity.
2Device complexity
If an approximate equation method is used to derive equivalent model parameters from measured admittance and resonant frequency information, then the calculation is simplified, but interference effects between adjacent resonant modes are not considered leading to very large estimation errors
Solution Approach 1:
The patent extracts and removes the interference effect of adjacent modes from the measured impedance data to obtain accurate individual mode impedance. This extraction approach maintains calculation simplicity while eliminating the large estimation errors caused by ignoring interference effects, thus resolving the contradiction between simplicity and accuracy.
3Device complexity
If equivalent modeling is performed for multi-mode transducers without considering mutual effects of adjacent resonant modes, then the modeling process is simplified, but correct estimation cannot be obtained due to interference effects
Solution Approach 1:
The patent applies local quality by treating different frequency regions differently: in regions dominated by individual modes, it estimates individual mode impedance by removing interference; in regions where modes combine, it estimates total mode impedance. This localized approach maintains modeling simplicity while ensuring accuracy across all operating conditions.
Data Source
AI summary
The present disclosure relates to an active sonar system including a transmitter; a transducer; and an impedance matching circuit, and a method of estimating an equivalent model parameter of a multi-mode transducer, wherein an electrical equivalent model parameter having a plurality of stages corresponding to each mode is estimated by estimating an individual mode impedance and a total mode impedance from multi-mode impedance data and obtaining an interference amount of adjacent modes, and an equivalent model modeled thereby for which an interference effect by a multi-mode is taken into consideration is used for the design of an impedance matching circuit to minimize actual model fabrication and effectively derive detailed design elements and the like, thereby allowing an integrated circuit design with peripheral electronic units for interfacing the sonar system.