Noncontact Communication Medium With Bleed-Power Adaptive Loading
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Solution Overview
Problem
Existing noncontact communication systems face challenges in stabilizing power supply to processing circuits and ensuring accurate reading of response signals due to variations in bleed power, leading to issues such as power outages or signal misinterpretation.
Innovation Solution
A noncontact communication medium with a resonance circuit, regulator, variable resistor, and switcher that adjusts resistance values based on bleed power to stabilize power supply and modulate signals effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed resistance load is applied to the resonance circuit, then the power supply to the processing circuit can be stabilized, but the modulation depth of the response signal becomes insufficient when bleed power is high, leading to inaccurate reading
Solution Approach 1:
The patent applies a variable resistor instead of a fixed resistance load, allowing the resistance value to be dynamically adjusted based on bleed power conditions. The control circuit monitors bleed power and modifies the resistance value accordingly, enabling the system to adapt between power stabilization mode (when bleed power is low) and signal modulation mode (when bleed power is high), thus resolving the contradiction between reliable power supply and accurate signal reading.
Solution Approach 2:
The patent changes the resistance parameter of the load connected to the resonance circuit based on operating conditions. By varying the resistance value in response to bleed power levels, the system optimizes both power supply stability and signal modulation depth under different operational scenarios, preventing both power outages and signal misinterpretation.
2Measurement precision
If the resistance value of the variable resistor is reduced to increase modulation depth, then signal reading accuracy improves, but power supply stability deteriorates due to increased power consumption
Solution Approach 1:
The patent implements a feedback control mechanism where the control circuit continuously monitors bleed power levels and adjusts the resistance value of the variable resistor accordingly. This closed-loop control ensures that when bleed power increases, the resistance is reduced to enhance modulation depth, while when bleed power is low, the resistance is increased to maintain power supply stability, thus resolving the contradiction between signal accuracy and power 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
Stabilizes power supply to processing circuits and ensures accurate reading of response signals by adjusting resistance values, preventing power outages and signal misinterpretation.
Implementation Method 1
a resonance circuit that generates an alternating current voltage by resonating using an induced current induced in an antenna coil by the magnetic field acting on the antenna coil
Implementation Method 2
a resonance circuit that generates an alternating current voltage by resonating
Data Source
AI summary
A noncontact communication medium performs communication with an external device in a noncontact manner. The noncontact communication medium includes a resonance circuit, a regulator that generates operating power, a variable resistor, a switcher, and a control circuit. The processing circuit generates a response signal corresponding to a command signal. The switcher switches between an applied state in which a load of the variable resistor is applied to the resonance circuit and a non-applied state in which the load is not applied to the resonance circuit, according to the response signal. The control circuit controls the resistance value according to the bleed power dissipated from the regulator.