Dummy Object Extremity Mass Inertia for Realistic Movement

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Solution Overview

Problem

Current dummy objects used for simulating traffic accidents and testing driver assistance systems lack realism and robustness, particularly in replicating pedestrian movements, leading to inaccurate data and high costs in crash tests.

Innovation Solution

A dummy object with a torso and movable arms and legs, utilizing a single drive for proximal extremity movement to replicate distal extremity movements through mass inertia, combined with mechanical stops and a magnetic holding mechanism for realistic and durable simulation of human movements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a dummy object uses multiple drives to control both proximal and distal extremity portions, then movement realism is improved, but device complexity and cost increase

Engineering Contradiction:

Improvemovement realismVSAvoiddrive system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The distal extremity portion utilizes its own mass inertia to generate realistic movement automatically when the proximal extremity portion is driven. The drive unit only needs to control the proximal portion, while the distal portion self-regulates its movement through inertial forces, eliminating the need for additional drives and complex control systems.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The extremity is divided into proximal and distal portions with different control mechanisms. The proximal portion is actively controlled by a drive unit, while the distal portion is passively controlled through mass inertia, creating a segmented control strategy that reduces overall system complexity.

Inventive Principle:

Principle #1Segmentation

2Manufacturing precision

If a dummy object uses complex mechanical linkages to correlate proximal and distal extremity movements, then movement accuracy is improved, but mechanical stress on components increases

Engineering Contradiction:

Improvemovement accuracyVSAvoidmechanical stress resistance

Core Design Contradiction:

Manufacturing precisionVSStrength

Solution Approach 1:

Complex mechanical linkages and couplings are replaced with a mass inertia-based system. Instead of using mechanical components to transmit and correlate movements between proximal and distal portions, the patent uses the natural inertial properties of the distal extremity portion to achieve realistic movement correlation, significantly reducing mechanical stress on components.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Stability of the object's composition

If a dummy object uses rigid mechanical couplings between extremity portions, then structural stability is improved, but movement naturalness decreases

Engineering Contradiction:

Improvestructural stabilityVSAvoidmovement naturalness

Core Design Contradiction:

Stability of the object's compositionVSReliability

Solution Approach 1:

The system transitions from static rigid couplings to dynamic mass inertia-based movement. The distal extremity portion is not rigidly coupled but instead moves dynamically based on inertial forces generated during proximal portion movement, allowing for more natural and realistic movement patterns while maintaining structural integrity.

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

The solution enables realistic and robust simulation of human movements, reducing mechanical stress on the drive and improving the durability of the dummy object, allowing for cost-effective and accurate testing of driver assistance systems.

Implementation Method 1

the distal extremity portion (156) is utilized in such a manner that a movement of the distal extremity portion (156), which is correlated with the movement of the proximal extremity portion (152), can be created by utilizing the mass inertia of the associated distal extremity portion (156)

Methodology Applied

Scientific EffectMass inertia: Inertia

Data Source

PatentUS10891876B2Dummy object with extremities which utilize the mass inertia thereof to replicate a natural movement process

Publication Date: 2021.01.12 4ACTIVESYST

AI summary

A dummy object is described which is particularly suitable for a functional testing of driver assistance systems for vehicles. The dummy object comprises a torso, at least one extremity-representing an arm or a leg, wherein the extremity includes a proximal extremity portion mounted in an articulated manner at the torso and a distal extremity portion mounted in an articulated manner at the proximal extremity portion, and at least one drive which is arranged in the torso and is designed to move the proximal extremity portion relative to the torso. The proximal extremity portion can be moved in such a manner that a movement of the distal extremity portion, which is correlated with the movement of the proximal extremity portion, can be created by utilizing the mass inertia of the associated distal extremity portion.