Radar Transceiver Pairing for Wireless Power Object Detection
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Solution Overview
Problem
Existing multiple antenna detection systems for inductive power transfer have limited calculating capability and interference tolerance, making them inadequate for safely detecting living objects in proximity to strong electromagnetic fields during wireless power transfer.
Innovation Solution
Implementing a system that groups radar transceivers into pairs and schedules them to transmit and receive radar signals in specific time slots, reducing interference and computational burden while enhancing detection accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple antenna detection systems are used to detect living objects in wireless power transfer systems, then detection coverage is improved, but calculating capability and interference tolerance become limited
Solution Approach 1:
The system divides multiple radar transceivers into separate pairs, with each pair operating independently in time-division mode. This segmentation reduces the computational burden on a single processing unit while maintaining comprehensive detection coverage through coordinated operation of multiple pairs.
Solution Approach 2:
Radar transceiver pairs operate in periodic time slots, alternating between transmission and reception phases. This periodic operation reduces simultaneous interference between multiple transceivers while maintaining continuous detection coverage through sequential scanning.
2Productivity
If multiple radar transceivers transmit simultaneously to improve detection speed, then productivity is improved, but interference increases and tolerance is limited
Solution Approach 1:
The system implements periodic time-division multiplexing where radar transceiver pairs transmit and receive in alternating time slots. This periodic operation enables high detection throughput while minimizing mutual interference between simultaneous transmitters through temporal separation.
Solution Approach 2:
The system pre-assigns specific time slots to specific radar transceiver pairs before operation begins. This preliminary scheduling prevents interference conflicts by ensuring that transceivers know in advance when they should transmit versus when they should receive, eliminating simultaneous transmission conflicts.
3Reliability
If time division access of radar transceivers is implemented to reduce interference, then reliability is improved, but detection frame rate may be reduced
Solution Approach 1:
By segmenting the radar system into multiple independent transceiver pairs that operate in parallel time slots, the system achieves both high reliability through interference reduction and maintains high frame rates through concurrent operation of multiple segments rather than sequential processing.
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 improves the detection performance by minimizing interference and increasing frame rates, allowing for effective detection of living objects near wireless power transfer systems without compromising system accuracy.
Implementation Method 1
a plurality of radar transceivers. The processor is configured to group the plurality of radar transceivers into pairs of radar transceivers. The processor is configured to instruct each of the pairs of radar transceivers to transmit radar signals during a corresponding time slot
Data Source
AI summary
Methods and apparatus utilizing time division access of multiple radar transceivers in living object detection for wireless power transfer applications are provided. In one aspect, an apparatus for detecting an object in a detection area of a wireless power transfer system is provided. The apparatus comprises a plurality of radar transceivers. The apparatus comprises a processor configured to group the plurality of radar transceivers into pairs of radar transceivers. The processor is configured to instruct each of the pairs of radar transceivers to transmit radar signals during a corresponding time slot of a plurality of time slots. The processor is configured to instruct each of the pairs of radar transceivers to receive the radar signals during the corresponding time slot of the plurality of time slots. The processor is configured to detect the object in the detection area based on at least some of the radar signals received by each of the pairs of radar transceivers.