IMU Noise Compensation for Vibration-Affected Electronic Devices

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Solution Overview

Problem

Vibration noise generated by electronic device elements during operations causes errors in position status sensing, leading to inaccurate human-machine interface operations.

Innovation Solution

An electronic device with a driver generating a driving signal and a noise prediction signal, coupled to a driven device and an inertial measurement device, compensates sensing information to reduce vibration noise impact, using a look-up table and damping control mechanism for improved signal-to-noise ratio.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If the driven device executes operations to provide functionality, then the device performance is improved, but vibration noise is generated that degrades position sensing accuracy

Engineering Contradiction:

Improvedevice performanceVSAvoidposition sensing accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent converts the harmful vibration noise into a useful signal by using the driving signal to predict the noise characteristics. The driver generates a noise prediction signal based on the driving signal, which is then used to compensate the sensing information from the inertial measurement device, transforming the harmful vibration effect into a correctable parameter.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent applies preliminary action by generating the noise prediction signal before it interferes with the position sensing. The driver predicts the vibration noise based on the driving signal in advance, allowing the inertial measurement device to pre-compensate the sensing information, thereby preventing the noise from degrading measurement accuracy.

Inventive Principle:

Principle #10Preliminary action

2Measurement precision

If vibration noise is present in sensing information, then the signal to noise ratio deteriorates, but position tracking accuracy is compromised

Engineering Contradiction:

Improvesignal to noise ratioVSAvoidposition tracking accuracy

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent implements feedback by using the driving signal to continuously predict and compensate for vibration noise in the sensing information. The inertial measurement device receives both the sensing information and the noise prediction signal, and uses this feedback loop to continuously correct the position data, improving both signal to noise ratio and tracking reliability.

Inventive Principle:

Principle #23Feedback

Data Source

PatentEP4474957B1Electronic device and noise cancellation method thereof

Publication Date: 2026.05.13 HTC CORP

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AI summary

An electronic device and a noise cancelation method thereof are provided. The electronic device includes a driver, a driven device, and an inertial measurement device. The driver is configured to generate a driving signal, and generate a noise prediction signal according to the driving signal. The driven device receives the driving signal to execute an operation, wherein the driven device generates a vibration noise according to generated vibrations when executing the operation. The inertial measurement device is configured to sense a position status of the electronic device to generate sensing information. The inertial measurement device receives the noise prediction signal, and compensates the sensing information according to the noise prediction signal to generate compensated sensing information.