Watch Kármán Line Detection Through Confidence Validation
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Solution Overview
Problem
Existing portable objects, such as watches, lack the capability to accurately detect the crossing of the Kármán line without real-time communication and require costly high-performance inertial navigation systems, leading to inaccurate detections due to the use of relatively inaccurate gyrometers and false positives from sudden accelerations or high forces.
Innovation Solution
A method using a portable object with a detection device comprising an acceleration sensor and an electronic unit to measure and process acceleration data, calculating a confidence index based on successive measurements to validate the detection of the Kármán line, utilizing a 3D acceleration sensor and potentially an angular velocity sensor to ensure accurate detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a high-performance inertial navigation system with accurate gyrometer is used, then measurement precision of altitude and orientation is improved, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts and eliminates the gyrometer from the navigation system, relying solely on the acceleration sensor to detect Kármán line crossing. By removing the problematic gyrometer component, the system achieves sufficient measurement precision without the complexity and cost of a full inertial navigation system.
Solution Approach 2:
The patent uses a simple, inexpensive acceleration sensor instead of a costly high-performance inertial navigation system. The acceleration sensor is sufficient for the specific task of detecting Kármán line crossing when combined with the validation method, providing cost-effective solution with adequate precision.
2Device complexity
If a simple acceleration sensor is used, then device complexity and cost are reduced, but measurement precision deteriorates leading to false positives
Solution Approach 1:
The patent implements a validation method that uses feedback from multiple acceleration measurements to confirm detected events. The system continuously monitors acceleration data and validates potential Kármán line crossing detections against established criteria, eliminating false positives while maintaining simplicity of the sensor system.
Solution Approach 2:
The patent performs preliminary validation checks before confirming a Kármán line crossing detection. By pre-establishing validation criteria and checking multiple parameters in advance, the system ensures detection accuracy without requiring complex sensor hardware.
3Measurement precision
If real-time communication with external systems is used, then measurement precision is improved through external reference data, but loss of time and dependency on external systems increase
Solution Approach 1:
The patent enables the portable object to perform autonomous detection and validation of Kármán line crossing using its own acceleration sensor and onboard processing unit. The system serves itself by incorporating the validation method directly into the portable object, eliminating the need for external communication systems and achieving real-time detection.
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 method provides reliable and accurate detection of the Kármán line by processing acceleration measurements, reducing false positives through confidence index validation, even in situations with sudden accelerations or high forces.
Implementation Method 1
an acceleration sensor capable of measuring the components of an acceleration vector
Data Source
AI summary
A validation method relating to the detection of a crossing of the Kármán line by a portable object (2) carried on board a rocket and incorporating a detection device including an acceleration sensor (8) capable of measuring accelerations of the portable object and an electronic unit for processing the acceleration measurements made so as to detect a crossing of the Kármán line by the portable object. The method calculates a confidence index, relating to measurements made by the portable object for a variable which is a function of forces exerted on this portable object, and checks whether a condition given for the confidence index is met. Also, a portable object, in particular a watch, designed to be able to implement a method for detecting a crossing of the Kármán line and the validation method of the invention.