Wireless Power Slot Control for Stable Received Power
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Solution Overview
Problem
Power transmission from wireless power transmitting apparatuses to receiving apparatuses may fail due to changes in the radio wave propagation environment, leading to power shortages that can cause load devices, such as sensors, to malfunction, resulting in errors in measured values and potential malfunctions in connected apparatuses.
Innovation Solution
A wireless power transmitting apparatus with a power transmitting circuit, signal transmitting circuit, signal receiving circuit, and control circuit that allocates time slots for power transmission and adjusts them based on received power levels, extending time slots when the power level falls below a threshold and waiting for a standby time before resuming operation to ensure stable power supply to load devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wireless power transmission is performed continuously, then power supply stability is improved, but system complexity increases due to need for continuous monitoring and adjustment
Solution Approach 1:
The patent divides continuous power transmission into discrete time slots, allocating specific time periods for power transmission and monitoring. This segmentation allows the system to maintain reliability through regular power supply while reducing complexity by processing adjustments in discrete intervals rather than continuously.
Solution Approach 2:
The patent implements periodic monitoring of received power levels and periodic adjustment of transmission parameters at predetermined intervals. This periodic action ensures power supply stability through regular checks while simplifying the system compared to continuous monitoring and adjustment mechanisms.
2Reliability
If time slots are extended to compensate for low received power, then power supply reliability is improved, but time utilization efficiency deteriorates
Solution Approach 1:
The patent dynamically adjusts time slot lengths based on real-time received power level measurements. When received power is sufficient, time slots are kept shorter to maximize time utilization. When received power drops below thresholds, time slots are extended to ensure reliable power transfer. This dynamic adaptation resolves the contradiction by making time slot duration variable rather than fixed.
Solution Approach 2:
The patent changes the time slot duration parameter in response to measured received power levels. The control circuit monitors power levels and adjusts the time slot length parameter accordingly, extending it only when necessary to maintain power supply reliability, thereby optimizing the balance between reliability and time utilization efficiency.
3Adaptability or versatility
If power transmission parameters are adjusted frequently, then adaptability to changing radio wave environment is improved, but system stability deteriorates due to frequent changes
Solution Approach 1:
The patent implements periodic monitoring and adjustment of power transmission parameters at predetermined intervals rather than continuously or frequently. This periodic approach allows the system to adapt to changing radio wave environments while maintaining stability by avoiding excessive parameter changes that could disrupt system operation.
Solution Approach 2:
The patent uses feedback from received power level measurements to trigger parameter adjustments only when necessary. The control circuit monitors power levels and adjusts transmission parameters in response to measured conditions, providing adaptability to environmental changes while maintaining system stability through condition-based rather than frequent adjustments.
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 configuration ensures that load devices receive stable power, reducing the likelihood of failures due to power shortages and maintaining operational stability even in changing radio wave environments.
Implementation Method 1
a power transmitting circuit configured to transmit power for operating the load device, to the wireless power receiving apparatus
Implementation Method 2
a signal receiving circuit configured to obtain an estimated value of a received power level indicating a level of the power transmitted from the wireless power transmitting apparatus and received by the wireless power receiving apparatus
Data Source
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AI summary
A wireless power transmitting apparatus is provided with: a power transmitting circuit for transmitting power for a load device to a wireless power receiving apparatus; a signal transmitting circuit for transmitting a control signal for the load device to the wireless power receiving apparatus; a signal receiving circuit for obtaining an estimated received power level indicating a level of the power transmitted from the wireless power transmitting apparatus and received by the wireless power receiving apparatus; and a control circuit. The control circuit periodically allocates time slots to wireless power receiving apparatuses for wireless power transmission. When the received power level is smaller than a threshold in a first time slot allocated to one wireless power receiving apparatus, the control circuit extends a second time slot allocated to the one wireless power receiving apparatus, the second time slot preceding or following the first time slot.