Self-Powered Wireless Sensor Using Inductor and Delay Circuit
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Solution Overview
Problem
Traditional sensors and monitoring systems for rotating and moving machines require external wiring for power and signal transmission, leading to increased complexity and cost, especially in environments like vehicles and industrial settings, where reliability and distance pose challenges.
Innovation Solution
A self-powered wireless monitoring system using a single coil transmitter with a magnet attached to a moving component, which induces a current to generate power and transmit signals without external wiring, utilizing an inductor, delay circuit, and antenna to send pulses corresponding to the machine's parameters like rotational speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sensors with external wiring are used, then power supply and signal transmission are reliable, but device complexity and installation cost increase
Solution Approach 1:
The transmitter generates its own power through electromagnetic induction from the moving magnet, eliminating the need for external power wiring. The system serves itself by converting mechanical motion into electrical energy for its own operation.
Solution Approach 2:
The patent replaces the mechanical wiring system with a wireless electromagnetic field-based power and signal transmission system, eliminating physical connections while maintaining functionality.
2Ease of manufacture
If traditional sensors with external wiring are used, then power and signal transmission are established, but installation and maintenance cost increase
Solution Approach 1:
The patent extracts and eliminates the wiring component from the sensor system, removing the need for installation and maintenance of physical connections while preserving the core sensing and transmission functions.
Solution Approach 2:
The self-powered transmitter eliminates the need for external power installation by generating its own energy from the monitored mechanical motion, simplifying installation procedures.
3Adaptability or versatility
If independent power supply is used for sensor, then sensor operation is independent, but system reliability decreases
Solution Approach 1:
The sensor achieves independence not through an external power supply but by harvesting energy from the mechanical motion it monitors, creating a symbiotic relationship where the monitored system directly powers the monitoring system.
Solution Approach 2:
The patent merges the power source with the monitored mechanical system itself, eliminating the separation between power supply and monitored object that causes reliability issues in traditional independent power configurations.
4Device complexity
If wireless transmission is implemented, then wiring complexity is reduced, but power generation capability must be self-sufficient
Solution Approach 1:
The patent utilizes the mechanical motion and vibration of the monitored system to generate electromagnetic energy through a moving magnet and stationary coil, converting mechanical energy into electrical energy for wireless transmission.
Solution Approach 2:
The system changes the energy state from mechanical motion to electrical energy through electromagnetic induction, enabling the transmitter to generate its own power from the kinetic energy of the monitored component.
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 system eliminates the need for external wiring, reducing installation and maintenance costs while ensuring reliable and precise monitoring of machine parameters without power source independence issues, allowing for remote monitoring with minimal components.
Implementation Method 1
The magnet interacting with the inductor generates sufficient power to transmit a signal corresponding to the time that the magnet interacts with the inductor
Data Source
AI summary
Apparatus for a self-powered wireless transmitter system. One such system includes an inductor, a delay circuit, and a transmitter with an antenna. The magnet interacting with the inductor generates both power and a trigger signal. The inductor generates sufficient power for the transmitter to transmit a wireless signal corresponding to when the magnet interacts with the inductor. Precise timing is insured by the inductor being connected to the trigger input of the transmitter unit and the delay circuit adding a short delay to the signal from the inductor with the delayed signal connected to the supply voltage connection of the transmitter. The transmitter transmits the wireless signal upon being energized through the delay circuit.