Wireless Power Transfer Motion Sensing for EM Exposure Safety
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Solution Overview
Problem
Wireless power transfer systems emit high-intensity electromagnetic fields that can be hazardous to humans and other living creatures, posing potential health risks.
Innovation Solution
A wireless power transfer system equipped with motion sensor equipment to detect moving objects and a controller that prevents electromagnetic radiation emission when a moving object is detected in a predefined region, using a radar-based detection system to ensure safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If high-intensity electromagnetic fields are emitted for wireless power transfer, then power transfer capability is improved, but safety hazard to living creatures increases
Solution Approach 1:
The motion detection system is activated before the electromagnetic field is emitted to detect the presence of moving objects in advance. If no moving objects are detected, the system permits power transfer; if moving objects are detected, the system prevents field emission, thereby eliminating the safety hazard before it can occur
Solution Approach 2:
The system continuously monitors the environment for moving objects during the power transfer process. When a moving object is detected, the system provides feedback to stop or prevent electromagnetic field emission, creating a closed-loop safety control mechanism that dynamically adjusts power transfer based on real-time detection
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 protects individuals and living objects from harmful electromagnetic exposure by preventing radiation emission when a moving object is present, enhancing safety and reliability in various environments.
Implementation Method 1
Wireless power transfer, WPT, relates to the wireless transmission of electrical energy from a primary (transmitting) side to a secondary (receiving) side. Energy may be transferred via electromagnetic induction from the primary side to the secondary side.
Implementation Method 2
motion sensor equipment operable to generate an output indicating whether or not a moving object is present in the environment; using a radar-based detection system
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
A wireless power transfer system and method of controlling a wireless power transfer system. The wireless power transfer system comprises an electromagnetic induction charger operable to emit electromagnetic radiation into an environment of the charger, motion sensor equipment operable to generate an output indicating whether or not a moving object is present in the environment, and a controller. The controller is configured to receive the output from the motion sensor equipment, determine whether the received output indicates that a moving object is present in a predefined region of the environment, and in response to a positive determination, prevent the charger from emitting the electromagnetic radiation.