Multichannel Transducer Gain Mapping for Seamless Signal Transition
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Solution Overview
Problem
Multichannel transducer devices face issues with discontinuities and noise floor discrepancies when switching between high and low sensitivity signals, due to the limitations of current control circuits and signal processing methods, which affect the accuracy and smoothness of output signals across a wide dynamic range.
Innovation Solution
A multichannel transducer device that processes signals from multiple acquisition modules of different sensitivity to generate a blended signal, using mapping parameters to smoothly transition from high to low sensitivity signals, thereby minimizing discontinuities and noise floor differences, by calculating a weighted average of the high and blended signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If direct switching between high sensitivity and low sensitivity signals is used, then the device can detect a wide dynamic range, but discontinuities and noise floor discrepancies occur in the output signal
Solution Approach 1:
The patent introduces an intermediary blended signal that combines both high sensitivity and low sensitivity channel outputs. This blended signal acts as a mediator during transitions, smoothing out discontinuities and noise floor discrepancies that would otherwise occur during direct switching between channels.
Solution Approach 2:
The patent dynamically adjusts the weighting between high sensitivity and low sensitivity channel signals based on signal strength conditions. The control circuit continuously monitors signal levels and adapts the blending ratio in real-time, transitioning smoothly from one channel to another rather than using fixed switching.
2Adaptability or versatility
If direct switching between high and low sensitivity signals is used, then the device can handle different signal strengths, but delay and discontinuities occur during channel switching
Solution Approach 1:
The patent prepares the blended signal in advance by continuously processing both high sensitivity and low sensitivity channel outputs simultaneously. This preliminary preparation ensures that when a transition is needed, the blended signal is already available, eliminating switching delay and discontinuities.
3Ease of operation
If control circuits are arranged away from the sensor, then signal processing flexibility is improved, but the ability to compensate for sensor limitations is reduced
Solution Approach 1:
The control circuit uses feedback from both high sensitivity and low sensitivity channel outputs to continuously monitor signal conditions and adjust the blending ratio accordingly. This feedback mechanism enables the distributed control circuit to effectively compensate for sensor limitations while maintaining processing flexibility.
Data Source
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AI summary
The present invention is directed to multichannel transducer devices and methods of operation thereof. One example device includes at least two acquisition modules (4a, 4b) that have different sensitives and a signal processing stage (12) that generates a blended signal representative of a lower gain signal mapped onto a higher gain signal. One example method of operation includes receiving a first signal from a first sensor having a first sensitivity, receiving a second signal from a second sensor having a second sensitivity that is different from the first sensitivity, generating a blended signal by mapping the second signal to the first signal, outputting the first signal while the first signal is below a first threshold and above a second threshold, and outputting the blended signal when the first signal is above the first threshold and when the first signal is below the second threshold.