Foreign Object Emulation for Wireless Power Detection Testing
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Solution Overview
Problem
Current methods for testing foreign object detection in wireless power transfer systems are manual, time-consuming, prone to operator error, and costly, lacking an efficient and accurate means to simulate and evaluate the interaction between wireless power devices and foreign objects.
Innovation Solution
A foreign object emulation device that includes a main body with emulated objects, a sensor unit with temperature and position sensors, and a drive unit for controlled relative movement, allowing for automated testing of wireless power devices' foreign object detection capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If manual testing methods are used for foreign object detection in wireless power transfer systems, then operator flexibility and adaptability are maintained, but testing accuracy deteriorates due to operator error and time consumption increases
Solution Approach 1:
The testing device automatically performs foreign object detection without requiring manual operation. The system self-regulates the testing process by automatically positioning the emulated foreign object, measuring temperature changes, and determining detection accuracy, thereby eliminating operator error and reducing time consumption while maintaining high testing accuracy
Solution Approach 2:
The patent replaces manual mechanical testing operations with an automated testing device that uses electromagnetic fields and temperature sensors to detect foreign objects. The drive unit automatically positions the emulated foreign object, and the temperature sensor automatically measures temperature changes, substituting human mechanical operations with automated electromechanical systems to improve accuracy and efficiency
2Productivity
If automated testing devices are introduced to improve testing efficiency, then productivity increases, but device complexity increases
Solution Approach 1:
The testing device is designed as a multi-functional integrated system that combines foreign object emulation, automated positioning, temperature sensing, and detection analysis in a single device. This universal design allows the same device to perform multiple testing functions simultaneously, improving productivity while managing complexity through functional integration rather than separate components
Solution Approach 2:
The patent introduces an emulated foreign object as an intermediary element that mediates between the wireless power transfer system and the detection mechanism. This intermediary allows the testing device to safely and accurately simulate various foreign object scenarios without requiring actual hazardous objects, simplifying the testing process while maintaining high productivity through standardized emulation
3Measurement precision
If comprehensive testing of multiple foreign object positions is performed, then measurement precision improves, but loss of time increases due to the need to test multiple positions
Solution Approach 1:
The testing device employs dynamic automation where the drive unit automatically adjusts the position of the emulated foreign object to multiple predetermined locations during the testing process. This dynamic positioning capability allows comprehensive testing of detection accuracy across different positions without manual intervention, improving measurement precision while managing system complexity through automated control sequences
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 foreign object emulation device enables accurate and efficient testing of wireless power devices' foreign object detection, reducing the risk of operator error and improving the reliability of compliance testing with standards like Qi.
Implementation Method 1
heat can be generated by magnetic induction in metal parts of the power receiver that are exposed to the magnetic field generated by the wireless power transmitter device
Data Source
AI summary
A foreign object emulation device (60; 160; 260) for testing foreign object detection of a wireless power device (10; 20) is provided. The foreign object emulation device (60; 160; 260) is in operative communication with a processing means (61; 42; 52). The foreign object emulation device (60; 160; 260) comprises a main body (68; 168; 268) being arranged with at least one emulated object (66; 166a-b; 266), a sensor unit (64) comprising at least one temperature sensor (64a) configured to transmit temperature data to the processing means (61; 42; 52), wherein the temperature data is indicative of the temperature of the at least one emulated object (66; 166a-b; 266), and means for causing a controlled relative movement between the at least one emulated object (66; 166a, 166b) and the wireless power device (10; 20) being tested.