Strain-Based Sensor Calibration for Real-Time External Parameter Updates

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Solution Overview

Problem

Existing calibration methods for electronic devices with structural elastic deformation are slow and unable to correct non-image capture devices like depth sensors and gyroscopes in real time, leading to positioning errors during long-term use.

Innovation Solution

Implementing strain sensing circuits to obtain strain sensing values, a linking database in memory, and a processor to update external parameters between sensing circuits in real time using a linking database, without relying on image capture.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If traditional image-based calibration methods are used to correct external parameters, then calibration accuracy can be achieved, but the calibration process takes too much time and cannot respond in real time

Engineering Contradiction:

Improvecalibration accuracyVSAvoidcalibration time

Core Design Contradiction:

Measurement precisionVSLoss of time

Solution Approach 1:

The patent replaces the image-based calibration method with a strain sensing-based method. Instead of using cameras to capture images and compute external parameters through image processing, the system uses strain sensing circuits to detect deformation and directly calculates external parameters through coordinate transformation. This substitution of measurement principle eliminates the time-consuming image capture and analysis process while maintaining calibration accuracy.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces strain sensing circuits as an intermediary between the structural deformation and the external parameter calculation. The strain sensing circuits detect the deformation of the electronic device structure and provide real-time data for computing external parameters. This intermediary enables direct measurement of deformation without requiring image capture, thus achieving real-time calibration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If only image capture devices are corrected for external parameters, then camera positioning can be maintained, but non-image capture devices like depth sensors and gyroscopes cannot be corrected in real time

Engineering Contradiction:

Improvepositioning accuracyVSAvoidcoverage of calibration

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent creates a universal calibration system that can correct external parameters for all types of sensing devices, not just image capture devices. The strain sensing-based calibration method is applied to depth sensors, gyroscopes, and other non-image capture devices simultaneously. This multi-functional approach ensures that all sensing devices maintain accurate positioning and orientation information, improving overall system reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Weight of moving object

If the electronic device uses elastic design for thinness and lightness, then device portability is improved, but the sensing devices become unfixed with structural deformation

Engineering Contradiction:

Improvedevice weightVSAvoidsensing device position stability

Core Design Contradiction:

Weight of moving objectVSStability of the object's composition

Solution Approach 1:

The patent implements a dynamic calibration system that continuously adapts to structural deformation. Instead of relying on fixed mechanical mounting, the system uses strain sensing circuits to detect real-time deformation and dynamically calculates corrected external parameters. This dynamic approach allows the electronic device to maintain sensing device stability even during elastic deformation, enabling thin and lightweight design without sacrificing positioning accuracy.

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

Enables rapid and flexible calibration of external parameters, improving operational efficiency by updating parameters in real time and reducing positioning errors.

Implementation Method 1

several strain sensing circuits are configured to obtain several strain sensing values in correspondence to a deformation of the electronic device

Methodology Applied

Scientific EffectStrain sensing: Piezoresistive Effect

Data Source

PatentUS12618723B2Electronic device, parameter calibration method, and non-transitory computer readable storage medium

Publication Date: 2026.05.05 HTC CORP

AI summary

An electronic device is disclosed. The electronic device includes several sensing circuits, several strain sensing circuits, a memory and a processor. The several sensing circuits are configured to obtain several sensing values. The several strain sensing circuits are configured to obtain several strain sensing values. The memory is configured to store a linking database. The linking database includes a linking relationship between several testing strain sensing value groups and several testing external parameter groups in correspondence. The processor is configured to: update several external parameters between the several sensing circuits according to the several strain sensing values and the linking database.