Kinetic pressure distribution back calculation method and system, computer device and storage medium

By combining a transparent flexible elastomer layer with inverse finite element analysis, the problem of integrating foot three-dimensional morphology and pressure distribution detection was solved, achieving high-precision, low-cost output of form-force integrated data, meeting the needs of digital foot assessment and customized orthotics.

CN122263548APending Publication Date: 2026-06-23SHANGHAI ORANGE HEALTH TECH CO LTD +1
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Patent Information

Application Number
CN202610721312.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-25
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing technologies cannot effectively integrate the detection of three-dimensional foot morphology and pressure distribution, resulting in problems such as scanning distortion, disconnection of shape and pressure data, insufficient detection resolution, and high equipment costs, which cannot meet the needs of digital foot assessment and customized orthotics.

Method used

By employing a transparent flexible elastomer layer combined with inverse finite element analysis, high-precision three-dimensional morphology and sub-millimeter-level pressure data of the foot are simultaneously acquired through optical means. An adaptive flexible support surface and an optical refraction compensation algorithm are designed to achieve data fusion that integrates form and force.

Benefits of technology

It accurately reproduces the foot's internal support status, achieves sub-millimeter-level high-resolution pressure sensing, eliminates optical distortion, reduces equipment costs, and meets the real-time requirements of clinical applications.

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Abstract

This invention relates to the field of digital biomechanical assessment technology, providing a method for inverse calculation of dynamic pressure distribution, including: S1: offline initialization, performing finite element discretization on a transparent flexible elastomer, constructing and preprocessing a global stiffness matrix; S2: online scanning and displacement boundary mapping, acquiring the initial height field of the elastomer under no-load conditions and the real-time height field of the bottom of the test part after the elastomer is pressed under load; S3: multi-layer medium refraction dynamic compensation, performing layered refraction correction on the laser beam path based on the surface normal vector of the elastomer after compression; S4: inverse finite element analysis (iFEA) pressure inverse calculation, inputting the corrected displacement field as boundary conditions into a preset mechanical model; S5: geometric-dynamic data fusion output, mapping high-precision three-dimensional geometric mesh and high-resolution pressure texture pixel by pixel. This simultaneously acquires high-precision three-dimensional foot morphology and sub-millimeter-level pressure data, solving the problems of scanning distortion and disconnection between shape and pressure data.
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