RFID Circuit Power Conservation via Impact-Triggered Load Switch
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing technologies lack an effective circuit for conserving battery power in portable electronic devices, especially those used continuously, which are not rechargeable and require sophisticated power management to transmit RFID signals efficiently.
Innovation Solution
A circuit design that includes a resistor in series with a power source to control capacitor charging, combined with an automatic load switch to manage power flow only during signal transmission, utilizing a microprocessor and radiofrequency component operating at 2.4 GHz with a peak current of 2 milliamps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device remains continuously active to transmit RFID signals, then signal transmission reliability is improved, but battery power is depleted rapidly
Solution Approach 1:
The device employs periodic action by remaining in a low-power sleep mode and only activating the RFID transmission circuit when an impact event is detected. The load switch transitions the circuit between inactive and active states based on impact detection, allowing the device to conserve battery power during idle periods while maintaining reliable signal transmission capability when needed.
2Use of energy by moving object
If the device is deactivated to conserve battery power, then energy consumption is reduced, but the device cannot detect or transmit signals
Solution Approach 1:
The device applies preliminary action by continuously monitoring for impact events using a sensor even when the RFID transmission circuit is inactive. When an impact is detected, the load switch automatically activates the transmission circuit in advance of the actual signal transmission need, ensuring the device is ready to transmit immediately without requiring continuous power consumption.
3Duration of action of stationary object
If a small capacity battery is used to extend device lifespan, then operational duration is improved, but available power for transmission is limited
Solution Approach 1:
The device uses periodic action by activating the transmission circuit only during brief impact events rather than continuously. This intermittent operation allows a small capacity battery to sustain the device for extended periods (up to five years) while still providing sufficient peak power for RFID signal transmission during the brief moments when the circuit is active.
Solution Approach 2:
The load switch provides dynamic power management by transitioning the circuit between inactive and active states based on impact detection. This dynamic control allows the system to optimize the balance between battery capacity and transmission power requirements, enabling the use of smaller batteries while maintaining adequate transmission capability when needed.
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 enables efficient battery power conservation by activating the circuit only during impact events, allowing for reliable RFID signal transmission while minimizing power consumption, extending device lifespan to five years of continuous operation.
Implementation Method 1
a resistor in electrical communication with the battery, wherein the resistor controls the rate at which a capacitor is charged from the battery
Implementation Method 2
a capacitor in electrical communication with the resistor, wherein the capacitor is a one micro-Farad capacitor
Implementation Method 3
a radiofrequency component in electrical communication with the microprocessor, wherein when the load switch is in a closed state a signal is transmitted from the radiofrequency component. The radiofrequency component operates at 2.4 giga-Hertz
Data Source
AI summary
A circuit for conserving power for a shot tracking device attached to a grip of a golf club is disclosed. The circuit comprises a battery, a resistor in electrical communication with the battery, a capacitor in electrical communication with the resistor, a load switch in electrical communication with the capacitor, a microprocessor in electrical communication with the load switch, and the microprocessor comprising a radiofrequency transceiver.