Inductive Power Tester Calibration Unit for Mobile Device Accuracy
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Solution Overview
Problem
Conventional test units for assessing inductive power charging capabilities of mobile devices suffer from poor accuracy due to imprecise power transmission measurements.
Innovation Solution
A test unit with a precisely calibrated power output, featuring a control unit that operates in calibration and testing modes, calculates constants for accurate power output determination, using time compensation and amplification constants to ensure consistent measurements across different secondary receiver coils, allowing for a quality assessment of inductive power charging capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional test units are used for inductive power measurement, then the testing function is provided, but the measurement precision is poor
Solution Approach 1:
The patent applies preliminary action by performing calibration measurements before actual testing. The test unit first determines amplification constants and time compensation parameters using a calibration unit with known characteristics, then uses these pre-determined values to accurately measure unknown mobile devices. This preliminary calibration step enables precise power output measurements without requiring complex real-time measurement systems.
Solution Approach 2:
The patent uses a calibration unit as an intermediary device between the test unit and the mobile device under test. The calibration unit has known inductive power charging capabilities and serves as a reference standard. By measuring the calibration unit first, the test unit establishes reference values that mediate and enable accurate measurements of subsequent unknown devices, improving measurement precision without directly measuring the target device with high complexity.
2Measurement precision
If amplification constants and time compensation parameters are determined through calibration, then the power output measurement precision is improved, but the testing time is increased
Solution Approach 1:
The calibration process that determines amplification constants and time compensation parameters is performed once as a preliminary action, and these values are stored for reuse. Subsequent measurements of different mobile devices use these pre-determined constants, eliminating the need to repeat the time-consuming calibration process for each device. This resolves the contradiction by performing the time-consuming precision-calibration step only once initially.
Solution Approach 2:
The amplification constants and time compensation parameters determined during calibration are universal values that can be applied to measure multiple different mobile devices. Rather than performing separate calibration procedures for each device, the same set of constants serves multiple measurement functions, reducing total testing time while maintaining precision across all measurements.
3Measurement precision
If the test unit calculates power output using derived constants, then the measurement accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent replaces direct complex physical measurement systems with a computational approach. Instead of using complex hardware to directly measure inductive power with high precision, the system uses a control unit that calculates power output based on voltage and current measurements combined with pre-determined amplification constants and time compensation parameters. This substitution of calculation for complex measurement hardware improves precision while managing device complexity.
Solution Approach 2:
The control unit acts as an intermediary that processes simple voltage and current measurements through mathematical calculations using pre-stored constants. Rather than requiring complex measurement hardware, the control unit mediates between basic electrical measurements and accurate power determination through computational methods, improving precision without proportionally increasing hardware complexity.
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 solution achieves very precise power output measurements, enabling accurate quality assessments of inductive power charging capabilities, ensuring reliable certification of mobile devices.
Implementation Method 1
The electrical circuit comprises a primary transmitter coil (111) for inductively transmitting power to a secondary receiver coil of the mobile device
Data Source
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AI summary
A test unit for testing the inductive charging capabilities of a mobile device and a method therefore is provided. Moreover, a calibrator unit for calibrating the test unit is provided. A general idea of the present invention is to provide a test unit for testing inductive power charging of a mobile device, wherein the test unit has a precisely calibrated power output. In a calibration mode the test unit calculates a number of constants required for determining the precisely calibrated output. Hence, after the execution of the calibrating mode, the test unit is capable of calculating its inductive power output, regardless of the type of secondary receiver coil of any device being inductively connected thereto. In a testing mode, the test unit calculates the power output when a mobile device is inductively connected thereto, and compares this calculated output to the measurement values of the received inductive power sent by the mobile device to determine a quality assessment of the inductive power measuring capability of the mobile device.