Projectile Fin Deployment Timeline via Magnetic Sensor Nesting
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Solution Overview
Problem
Fin deployment in fin-stabilized projectiles is difficult to accurately validate due to the harsh conditions during launch, making it challenging to measure and ensure the precise timing and stability of fin deployment, which is critical for the projectile's range and accuracy.
Innovation Solution
A projectile with a body, fins equipped with magnets, magnetic sensors, and a data recorder that collects data on fin displacement after launch, allowing for the generation of deployment curves and analysis of fin operation, enabling more accurate evaluation of fin deployment timelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If magnetic sensors and data recorders are installed inside the projectile body to measure fin deployment, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The magnetic sensor and data recorder are nested within the projectile body, with the sensor positioned in a recessed cavity. This nesting approach allows the measurement system to be integrated inside the projectile without significantly increasing external dimensions or complexity, while still achieving precise fin deployment timing measurement through magnetic field detection.
Solution Approach 2:
The patent replaces complex mechanical linkage or optical measurement systems with a magnetic field-based sensing system. The magnet attached to the fin and magnetic sensor inside the body provide contactless measurement, eliminating the need for mechanical connections that would complicate the projectile structure while maintaining high measurement precision.
2Measurement precision
If multiple magnets and magnetic sensors are used to track multiple fins, then measurement precision is improved, but manufacturing complexity increases
Solution Approach 1:
The measurement system is segmented into identical modular units, with each fin having its own magnet and each measurement location having its own magnetic sensor. This segmentation allows for standardized manufacturing of each sensor-magnet pair, simplifying the overall manufacturing process despite the increased number of components. Each module can be independently assembled and tested before integration into the complete projectile.
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
This solution provides accurate data on fin deployment, allowing for the validation of computer models and detection of potential flaws in fin design, thereby improving the precision and stability of fin-stabilized projectiles.
Implementation Method 1
a magnetic sensor disposed within the body, the magnetic sensor being arranged to detect changes in a position of the magnet relative to the magnetic sensor
Data Source
AI summary
A projectile is disclosed, comprising: a body; a fin having a magnet disposed thereon, the fin being coupled to the body, at least a portion of the fin being arranged to: (i) stay inside the body before the projectile is launched, and (ii) exit the body after the projectile is launched; a magnetic sensor disposed within the body, the magnetic sensor being arranged to detect changes in a position of the magnet relative to the magnetic sensor while the fin is exiting the body; and a data recorder disposed within the body, the data recorder being operatively coupled to the magnetic sensor, wherein the data recorder is configured to use the magnetic sensor to collect data indicating a displacement of the fin relative to the body after the projectile is launched.