Bi-stable Pulse Generator Harvesting Energy from Moving Elements
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Solution Overview
Problem
Existing pulse generators that harvest energy from moving elements, such as Wiegand wires and magnetic core generators, face limitations due to small energy output, mechanical complexity, and high costs, requiring specialized electronic interfaces and precise manufacturing.
Innovation Solution
A pulse generator design featuring two magnetic elements in bi-stable states that realign under a magnetic force, inducing an electrical pulse in a surrounding coil, allowing for scalable energy production without a power supply, with a simple and robust mechanical structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If Wiegand wire or magnetic core generators are used to harvest energy from moving elements, then electrical pulses are generated, but the energy output is extremely small (micro-watt level) requiring specialized electronic interfaces
Solution Approach 1:
The patent changes the physical parameters of the magnetic system by using two magnetic elements in bi-stable states with a coil winding, transforming the energy harvesting mechanism from micro-watt level to milliwatt-level output, thereby eliminating the need for specialized low-power electronic interfaces
Solution Approach 2:
The invention segments the magnetic system into two separate magnetic elements (first and second magnetic elements) that can independently realign in bi-stable states, allowing each element to contribute to pulse generation and increasing overall energy output compared to single-element systems
2Use of energy by moving object
If magnetic core generators with springs and magnetizable cores are used, then higher energy pulses are produced, but mechanical complexity increases requiring precise manufacturing and mounting
Solution Approach 1:
The patent extracts and eliminates the complex spring mechanism and magnetizable core from the system, replacing them with two permanent magnetic elements that naturally realign in bi-stable states, thereby maintaining high energy output while dramatically simplifying manufacturing requirements
Solution Approach 2:
The magnetic elements automatically realign themselves in bi-stable states under magnetic force without requiring external spring mechanisms or precise mechanical mounting, making the device self-regulating and much easier to manufacture
3Reliability
If mechanical stoppers and damping materials are added to stop the moving core, then the device can operate, but the lifetime is limited and design complexity increases
Solution Approach 1:
The patent replaces the mechanical stopper and damping material system with a magnetic field-based bi-stable system where magnetic elements realign under magnetic force, eliminating mechanical impact and wear, thereby indefinitely extending device lifetime while maintaining operational reliability
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 provides a scalable, mechanically simple, and cost-effective means of generating electrical pulses, capable of producing higher energy levels than traditional devices, eliminating the need for batteries and complex mechanical components.
Implementation Method 1
a coil surrounding said magnetic elements in said mounting... generate a pulse in said coil
Data Source
AI summary
A pulse generator comprises a mounting to hold two bodies in proximity to each other. Two magnetic elements may be movably placed in the mounting, and the magnetic elements will align with each other in one of two stable states. A coil surrounds the magnetic elements in the mounting, and a force application device applies a force to the first magnetic element to cause the first magnetic element to break the current alignment and thereby make the first and second magnetic elements realign to the other stable state. The movement of the magnets generates a pulse in the coil which may be detected by suitable circuitry and used. The device may be used inter alia to count rotations or linear movements, or to provide switching or remote control without the need for a separate power source.