Dummy Device Respiration Simulation for Automotive Testing
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Solution Overview
Problem
Current dummy devices fail to realistically replicate the motion characteristics of humans, particularly in simulating different states such as waking or sleeping, which is crucial for testing assistance systems in various applications like automotive development.
Innovation Solution
A dummy device comprising a torso element with a respiration simulation element that moves sequentially with a respiratory frequency, mimicking human breathing patterns, and a drive element to simulate the motion characteristics of human respiration, allowing for the realistic representation of human states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a dummy device uses simple geometric shape and size to represent a human, then the device complexity is reduced, but the ability to realistically reproduce motion characteristics of different human states deteriorates
Solution Approach 1:
The dummy device is divided into multiple independent modules: a torso element, a respiration simulation element, and a drive element. This segmentation allows each component to be optimized for its specific function while keeping the overall device manageable in complexity. The respiration simulation element can move independently relative to the torso element to create realistic breathing motions.
Solution Approach 2:
The dummy device incorporates dynamic motion capabilities through the respiration simulation element that can sequentially move away from and towards the torso element with a respiratory frequency. This dynamic behavior enables the dummy to reproduce different human states (waking, sleeping) through varying motion patterns, thereby improving reliability without excessive complexity.
2Reliability
If a dummy device adds motion simulation capabilities to reproduce different human states, then the realistic reproduction of motion characteristics is improved, but the device complexity increases
Solution Approach 1:
The respiration simulation function is extracted as a separate movable element from the torso, allowing it to be controlled independently. This extraction enables realistic motion characteristics without requiring the entire dummy device to be overly complex. The drive element specifically controls only the respiration motion, isolating this function from other potential dummy systems.
Solution Approach 2:
The respiration simulation element serves multiple functions: it reproduces breathing motions, indicates different human states (waking, sleeping) through varying respiratory patterns, and provides a test target for assistance systems. This multi-functionality improves reliability without proportionally increasing complexity, as one component achieves multiple objectives.
3Measurement precision
If a dummy device uses detailed material properties to resemble a real human, then the measurement precision for assistance systems is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The dummy device applies different properties to different parts: the torso element provides a stable geometric reference, while the respiration simulation element provides dynamic motion characteristics. This local differentiation allows each part to be manufactured with appropriate precision levels for its specific function, avoiding the need for high precision throughout the entire device.
Solution Approach 2:
The dummy device uses controllable parameters such as respiratory frequency and motion amplitude to represent different human states. By changing these parameters rather than manufacturing different physical prototypes, the device achieves high measurement precision for various human conditions without corresponding increases in manufacturing precision requirements.
Data Source
AI summary
A dummy device includes a torso element which simulates a torso of a human; a respiration simulation element which at least partially covers the torso element, and which is movably arranged with respect to the torso element; and a drive element which is adapted to sequentially move the respiration simulation element away from the torso element and towards the torso element with a respiratory frequency, to simulate a motion characteristic of a human respiration. Embodiments of the invention further relate to a method for operating a dummy device.