Multi-function Key System Using Magnetic Field Differentiation
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Solution Overview
Problem
Existing key systems for power equipment lack the ability to differentiate between multiple functionalities based on the inserted key, limiting the operational flexibility and efficiency of devices like lawn mowers and vehicles.
Innovation Solution
A multi-function key system utilizing first and second keys with distinct magnetic fields detected by sensors, allowing the key identification system to initiate different functionalities of power equipment based on the key inserted, such as full or partial functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional single-function key system is used, then the device can be operated with a simple key, but the operational flexibility and functionality are limited
Solution Approach 1:
The patent implements multi-functionality by enabling a single key system to perform multiple operations. Different keys with unique magnetic field signatures allow the same physical key structure to activate different functionalities (e.g., start engine, unlock doors, activate accessories) without requiring multiple separate key systems or mechanical components.
Solution Approach 2:
The patent replaces traditional mechanical key differentiation (different physical shapes, cuts, or mechanisms) with a magnetic field-based identification system. Sensors detect magnetic field characteristics to distinguish between different keys, eliminating the need for complex mechanical key variations while maintaining security and functionality.
2Productivity
If multiple keys with different functionalities are introduced, then operational efficiency and user control are enhanced, but the key identification system becomes more complex
Solution Approach 1:
The patent uses magnetic field detection instead of mechanical recognition to identify different keys. This substitution simplifies the overall system by using electromagnetic principles rather than complex mechanical differentiation, allowing efficient multi-functionality with relatively simple sensor-based identification.
Solution Approach 2:
The system differentiates between keys by detecting variations in magnetic field parameters (strength, polarity, configuration) rather than requiring complex mechanical differences. This parameter-based differentiation allows multiple keys with distinct functionalities to be recognized through simple sensor readings of magnetic characteristics.
3Measurement precision
If magnetic field sensors are used to differentiate keys, then key identification accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces potential mechanical or optical key recognition systems with magnetic field sensors. This substitution provides accurate key identification through magnetic field detection while maintaining relatively simple sensor implementation, as magnetic sensors are well-established and can be integrated into existing key cylinders with minimal additional complexity.
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 flexible operation of power equipment by allowing users to select specific functionalities through the use of different keys, enhancing operational efficiency and user control.
Implementation Method 1
The first key comprises a first magnet generating a first magnetic field. The second key comprises a second magnet generating a second magnetic field. Wherein the first and second sensors differentiate between the first and second key based upon the first and second magnetic fields.
Data Source
AI summary
A multi-function key system and method is provided that includes key identification system, a first key, and a second key. The multi-function key system is in communication with an item of power equipment, and comprises first and second sensors for detecting magnetic fields. The first key is configured to interact with the key identification system, the first key comprises a first magnet generating a first magnetic field. The second key is configured to interact with the key identification system. The second key comprises a second magnet generating a second magnetic field. Wherein the first and second sensors differentiate between the first and second key based upon the first and second magnetic fields. The key identification system initiates a first functionality of the power equipment responsive to identifying the first key, and initiates a second functionality of the power equipment responsive to identifying the second key.