Multichannel Transducer Signal Blending for Smooth Dynamic Range
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Solution Overview
Problem
Current multichannel transducer devices experience discontinuities and noise discrepancies when switching between high and low sensitivity signals, due to the inherent limitations of separate gain control circuits and sensor sensitivities, which limits their ability to detect a wide dynamic range of signals smoothly.
Innovation Solution
A multichannel transducer device that simultaneously acquires signals from multiple sensors with different sensitivities, processes these signals to determine mapping parameters, and generates a blended signal by weighting the high and low gain signals, allowing for a smooth transition without discontinuities when the high gain signal saturates.
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 of signals, but discontinuities and noise discrepancies occur in the output signal
Solution Approach 1:
The patent introduces a blended signal as an intermediary between the high sensitivity and low sensitivity signals. This blended signal is generated by mapping the low gain signal onto the high gain signal and combining them with weighted averaging. The blended signal acts as a smooth transition medium that eliminates discontinuities and noise discrepancies when switching between sensitivity ranges, while still enabling wide dynamic range detection.
2Adaptability or versatility
If multiple acquisition channels with different sensitivities are used, then the device can detect both strong and weak signal portions, but the switching between channels creates delay and discontinuities
Solution Approach 1:
The patent maintains continuous signal processing by generating the blended signal continuously through mapping and weighted averaging operations. Instead of discrete switching between channels, the system continuously combines both high sensitivity and low sensitivity signals with dynamically adjusted weights. This continuous blending operation eliminates switching delays and maintains uninterrupted signal detection across the full dynamic range.
3Device complexity
If control circuits for gain are arranged away from the sensor, then the device structure is simplified, but the circuits fail to compensate for inherent limitations of the sensor
Solution Approach 1:
The patent segments the signal processing into distinct functional stages: initial sensor acquisition, mapping parameter determination, signal mapping, and weighted averaging combination. By determining mapping parameters separately based on signal strength and applying them in the blending stage, the system compensates for sensor limitations without requiring complex pre-processing circuits at the sensor location. This segmented approach maintains structural simplicity while achieving precise compensation through post-acquisition processing.
Data Source
AI summary
The present disclosure is directed to multichannel transducer devices and methods of operation thereof. One example device includes at least two acquisition modules that have different sensitives and a signal processing stage 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.