Wireless Power Beam Control for Dynamic Exposure Safety
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Solution Overview
Problem
Existing wireless power transmission systems face challenges in safely transmitting power over reasonable distances in domestic or office environments, as they often fail to account for power loss due to absorption or reflection by objects, leading to potential hazards such as damage to sensitive objects or equipment.
Innovation Solution
A system that calculates the difference in power between the transmitter and receiver, using power meters to measure emitted and received power, and implements a control system to respond to varying levels of power loss by adjusting operational parameters such as power level or beam direction to prevent hazardous exposure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the beam power emitted by the transmitter is increased to transmit enough power over a reasonable distance, then the power transmission efficiency is improved, but the risk of beam-generated damage to sensitive objects or equipment increases
Solution Approach 1:
The system continuously monitors the power received by the receiver and compares it to the power emitted by the transmitter. When a discrepancy is detected indicating potential beam loss or unintended exposure, the control system automatically adjusts the beam power or terminates transmission to prevent damage to sensitive objects.
Solution Approach 2:
The beam power is not fixed but dynamically adjusted based on real-time conditions. The system can modify the power level or terminate the beam rapidly in response to detected changes in the transmission environment, such as objects entering the beam path or unexpected power loss.
2Length of stationary object
If the beam is directed towards the receiver with high power, then the power transmission distance is extended, but the potential for incorrect direction or intrusion causing safety hazards increases
Solution Approach 1:
The system performs preliminary scanning to identify the receiver's location and establish the correct beam direction before initiating high-power transmission. This preliminary positioning ensures the beam is accurately directed toward the intended receiver, reducing the risk of misdirection and associated safety hazards.
Solution Approach 2:
The system continuously monitors whether the receiver is correctly positioned and receiving the expected power level. If the beam becomes misdirected or the receiver moves out of position, the system detects the power discrepancy and adjusts or terminates the beam to prevent unintended exposure of other objects.
3Reliability
If the transmitter continuously monitors power loss to detect obstructions, then the safety response time is improved, but the system complexity increases
Solution Approach 1:
The control system receives continuous feedback from power meters measuring both emitted and received power. By comparing these two measurements, the system automatically detects obstructions or beam loss without requiring complex additional sensors, achieving rapid safety response through simple power differential monitoring.
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 effectively minimizes the risk of lasing towards sensitive objects or in forbidden areas while ensuring efficient and undisturbed power transmission, by dynamically adjusting to changes in power loss and adhering to safety regulations.
Implementation Method 1
The transmitter may use a laser beam, or another high-energy beam, to supply receivers with power
Implementation Method 2
equipped with a photovoltaic cell to convert the beam received by the transmitter to usable energy
Data Source
AI summary
Methods and systems for safely and effectively supplying a beam of wireless power from a transmitter to at least one receiver. A delta signal is generated by repeatedly calculating the difference in power between the power of the beam emitted by the transmitter and the amount of power received at the receiver. The system dynamically generates a time delay, which is a time period shorter than the maximal exposure duration relating to safe exposure durations for the power level of the delta signal. If the time delay is exceeded, the system changes an operational parameter of the system, such as terminating the beam. Because of limitations to building a perfect timing system, the system is built to be more sensitive to time delays having longer safe exposure durations, with large delta signals having short safe exposure durations being responded to immediately and without significant regard to the time delay.