Ultrasound Sampling Rate Adaptation for Interference and Power Control

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Solution Overview

Problem

Electronic devices using acoustic technology for transmitting and receiving ultrasound signals face challenges with power consumption due to limited bandwidth and interference from other devices, leading to increased sampling rates and thus higher power usage.

Innovation Solution

The solution involves dynamically adjusting the sampling rate and frequency band of the electronic device based on detected interference, using techniques such as Time Divisional Multiplexing (TDM) and Frequency Divisional Multiplexing (FDM), to minimize power consumption while maintaining effective signal processing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the sampling rate is increased to expand the available frequency band, then the bandwidth and number of simultaneous transmitting devices are improved, but the power consumption increases

Engineering Contradiction:

Improveavailable frequency bandVSAvoidpower consumption

Core Design Contradiction:

Area of stationary objectVSUse of energy by moving object

Solution Approach 1:

The patent applies dynamic sampling rate adjustment by monitoring interference levels in the frequency band and adapting the sampling rate accordingly. When interference is detected, the system increases the sampling rate to access higher frequency bands that are less affected by interference. When interference is low, the system reduces the sampling rate to conserve power. This dynamic adaptation resolves the contradiction by making the frequency band availability and power consumption variable rather than fixed.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system changes the sampling rate parameter based on detected interference conditions. By monitoring the acoustic environment and adjusting the sampling rate parameter dynamically, the system can expand into higher frequency bands when needed (improving bandwidth) while operating at lower sampling rates during normal conditions (reducing power consumption).

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the sampling rate is increased to avoid interference and intermodulation effects, then the signal quality and detection accuracy are improved, but the power consumption increases

Engineering Contradiction:

Improvesignal qualityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent implements a feedback mechanism where the system continuously monitors the acoustic environment for interference and intermodulation distortion. Based on this feedback, the system dynamically adjusts the sampling rate to maintain signal quality. When interference is detected, the feedback loop triggers an increase in sampling rate to move to cleaner frequency bands. When the environment is clean, the system reduces the sampling rate to save power, thus resolving the contradiction between signal quality and power consumption through closed-loop control.

Inventive Principle:

Principle #23Feedback

3Measurement precision

If a fixed high sampling rate is used to ensure perfect signal reconstruction, then the measurement precision is improved, but the power consumption increases

Engineering Contradiction:

Improvesignal reconstruction accuracyVSAvoidpower consumption

Core Design Contradiction:

Measurement precisionVSUse of energy by moving object

Solution Approach 1:

The system transitions from a static fixed sampling rate approach to a dynamic adaptive approach. By continuously monitoring interference conditions and adjusting the sampling rate in real-time, the system maintains perfect signal reconstruction accuracy only when necessary (in high interference conditions) while operating at lower sampling rates during normal conditions, thus resolving the contradiction between measurement precision and power consumption.

Inventive Principle:

Principle #15Dynamics

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

By dynamically adjusting the sampling rate and frequency band, the electronic device can reduce power consumption while effectively mitigating interference, allowing for efficient operation within limited bandwidth constraints.

Implementation Method 1

an acoustic transducer (2), such as a speaker, transmitting acoustic signals, such as a probe signal, in an ultrasound frequency band

Methodology Applied

Scientific EffectAcoustic wave propagation: Sound

Implementation Method 2

at least one microphone or transducer (1) receiving reflected acoustic signals and convert the received acoustic signals to an electrical signal

Methodology Applied

Scientific EffectAcoustic-to-electrical transduction:

Data Source

PatentUS20250189666A1Dynamic sampling rate

Publication Date: 2025.06.12 ELLIPTIC LAB AS

AI summary

A method and device for assuring at least a signal is received undistorted, wherein the method and device including at least one first transducer for receiving acoustic signals in a predetermined frequency band and digitizing said acoustic signals at a predetermined sampling rate, at least one second transducer for transmitting acoustic signals in said predetermined frequency band corresponding to said predetermined sampling rate, an analyzing unit for comparing said transmitted acoustic signals with said received acoustic signals, wherein, the analyzing unit analyzes the quality of said received acoustic signals, detect at least one deviation between said transmitted acoustic signals and said received acoustic signals, and adjust said sampling rate and corresponding frequency band according to a set of predefined frequency bands and sampling rates.