Human Body Model Parameter Determination via Force Probing
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Solution Overview
Problem
Current human body models in computer graphics and other fields lack the ability to simulate the mechanical behavior of soft tissues accurately, particularly in response to internal and external forces, limiting their utility in applications like product design and medicine where trustworthy predictions are needed.
Innovation Solution
A method involving contact-based probing with a force sensor-equipped probe tip to measure forces and movements on a test subject, determining model parameters such as elasticity and skin friction, and incorporating these into a target model to simulate the response of a target person's body to various inputs, including garment interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If physics-based models with arbitrary constitutive properties are used, then physically plausible jiggles and bulges can be produced, but the models lack reliability for trustworthy predictions in product design and medicine
Solution Approach 1:
The patent changes the approach to obtaining mechanical properties from arbitrary selection to measurement-based parameter determination. By using a probe to measure force and relative movement at specific body locations, the system obtains actual mechanical property values (elasticity, skin friction) for the target person, transforming the model from using arbitrary parameters to using measured parameters that reflect the individual's actual tissue characteristics.
Solution Approach 2:
The patent replaces the need for complex invasive mechanical testing with a non-invasive probe-based measurement system. Instead of requiring surgical biopsy or complex laboratory testing to obtain tissue mechanical properties, the system uses a simple probe that measures force and movement at the body surface, substituting a complex measurement problem with a simpler, non-invasive approach.
2Measurement precision
If contact-based probing with force sensors is used to measure mechanical properties, then accurate and personalized model parameters can be obtained, but the measurement process becomes more complex
Solution Approach 1:
The patent segments the body into discrete measurement locations (such as specific points on the skin surface) where mechanical properties are measured independently. By dividing the complex task of characterizing entire body tissues into discrete, localized measurements at specific points, the system makes the overall measurement process more manageable while maintaining precision at each location.
Solution Approach 2:
The probe acts as an intermediary device that translates complex tissue mechanical properties into measurable quantities (force and relative movement). Instead of directly measuring difficult-to-obtain tissue properties, the probe measures the mechanical response at the contact interface, serving as a mediator between the measurement system and the complex biological tissue.
3Shape
If existing optical scanning technologies are used to measure body appearance and shape, then 3D body data can be obtained, but the spatial distribution of mechanical properties cannot be easily measured
Solution Approach 1:
The patent merges the measurement of mechanical properties with the existing 3D body scanning framework. By combining optical scanning data (which provides 3D geometry and surface information) with force sensor measurements (which provide mechanical property data), the system creates an integrated measurement approach that simultaneously obtains both shape and mechanical characteristic information at corresponding locations.
Solution Approach 2:
The patent creates a digital copy or model of the body's mechanical properties based on the measured data. By measuring mechanical properties at specific locations and using this information to construct a computational model, the system creates a virtual representation of the body's mechanical characteristics that can be analyzed and simulated without physical manipulation of the actual tissue.
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 the creation of accurate and personalized human body simulations that can predict how garments fit and deform on an individual, addressing the limitations of existing models by providing reliable mechanical property measurements and simulations.
Implementation Method 1
measuring a first force applied by the probe tip to the first location of the body of the first test subject with the force sensor
Implementation Method 2
obtaining a first relative movement, the first relative movement comprising a first movement of the probe tip relative to the first location of the body of the first test subject
Data Source
AI summary
A method that simulates a response of a target person to one or more simulation inputs comprises: contacting a body of a first test subject with a force-sensing probe; measuring a first force applied by the probe to the body of the first test subject; obtaining a first relative movement comprising a first movement of the probe relative to the body of the first test subject; determining one or more model parameters associated with the body of the first test subject based on the measured first force and the first relative movement; incorporating the one or more model parameters into a target model of at least a portion of a body of a target person; obtaining a simulation input for application to the target model; and simulating a response of the target person in response to the simulation input using the target model.