Information Transmitter Dual Time Constant Coil Control
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Solution Overview
Problem
Information transmitters used in electronic devices face challenges in efficiently transmitting data in low-power environments, particularly in wireless communications, where power management is critical due to frequent changes in magnetic fields required for data transmission.
Innovation Solution
The information transmitter employs a signal generator that applies varying coil voltages with different time constants to a transmitting coil, forming distinct current paths to optimize magnetic field generation and prolong its duration, reducing power consumption by decoupling the loop path from the input resistor and reversing voltage polarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a single time constant is used for coil voltage application, then the circuit design is simple, but the magnetic field duration is insufficient and power consumption is high
Solution Approach 1:
The patent divides the single time constant into two distinct time constants: a first time constant for initial magnetic field generation and a second time constant for extending magnetic field duration. This segmentation allows the system to achieve longer magnetic field persistence without requiring continuous high-power input, thereby resolving the contradiction between duration extension and circuit complexity.
Solution Approach 2:
The patent dynamically switches between different time constants based on operational phases. The first time constant is applied during the initial phase for rapid magnetic field establishment, while the second time constant is applied subsequently to maintain and extend the magnetic field duration. This dynamic adjustment optimizes both performance and power efficiency.
2Reliability
If high coil voltage is applied continuously, then magnetic field strength is maintained, but power consumption increases
Solution Approach 1:
The patent employs periodic voltage application with alternating polarity through the two time constants. Instead of continuous high-voltage application, the system uses periodic pulses with the first time constant for initial excitation and the second time constant for sustained effect, reducing overall power consumption while maintaining transmission reliability through repeated cyclic stimulation.
Solution Approach 2:
The patent changes the voltage parameter over time by applying different voltage levels corresponding to the two time constants. The first time constant uses a higher voltage for initial magnetic field generation, while the second time constant uses a lower voltage for extended duration, optimizing the balance between magnetic field strength and power consumption.
3Duration of action of stationary object
If the loop path remains connected to the input resistor, then circuit continuity is maintained, but magnetic field duration is reduced
Solution Approach 1:
The patent extracts the loop path from the input resistor connection during the second time constant phase. By disconnecting the loop path from the input resistor after the initial excitation phase, the system allows the magnetic field to persist longer without the dampening effect of continuous resistive loading, while maintaining circuit stability through controlled switching between connection states.
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 approach significantly reduces power consumption while maintaining the magnetic field for a longer period, enhancing data transmission efficiency and accuracy, particularly in devices like smartphones and smart watches.
Implementation Method 1
a transmitting coil configured to receive a coil voltage to generate a magnetic field
Data Source
AI summary
An information transmitter includes a transmitting coil configured to receive a coil voltage to generate a magnetic field; and a signal generator configured to receive a direct current (DC) voltage and operating switches to apply the coil voltage to the transmitting coil, for a first time constant in a first current path, wherein the coil voltage includes a first value, and for a second time constant in a second current path, wherein the coil voltage includes a second value smaller than the first value, and wherein the first time constant and second time constant are different from each other.