Wireless Sensor Power Link With In-Band ASK Data Decoding
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Solution Overview
Problem
Existing wireless power and data transfer systems for sensors often require additional antennas and circuitry, leading to inefficiencies, increased Bill of Materials (BOM), and potential interference, which complicates device design and increases costs.
Innovation Solution
A demodulation circuit that decodes Amplitude Shift Keying (ASK) signals within the same channel as wireless power signals, reducing the need for additional circuitry and computational resources, allowing for low-cost and low-BOM in-band communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional antennas and circuitry are used for data communication in wireless power transfer systems, then data transfer capability is improved, but device complexity and Bill of Materials increase
Solution Approach 1:
The patent combines wireless power transfer and data communication functions into a single antenna and circuitry system. The demodulation circuit extracts data signals from the wireless power transfer signals, eliminating the need for separate communication hardware. This merging approach maintains full data transfer capability while significantly reducing device complexity and component count.
Solution Approach 2:
The wireless power transfer system is designed to perform multiple functions: it simultaneously provides power transfer and data communication capabilities. The single antenna and associated circuitry serve both power reception and data extraction purposes, making the system universal and multi-functional rather than requiring specialized separate systems.
2Adaptability or versatility
If additional antennas and circuitry are used for data communication, then data transfer capability is improved, but Bill of Materials increases
Solution Approach 1:
The patent merges power transfer and data communication functions into shared hardware components. By using the same antenna and circuitry for both purposes, the system eliminates duplicate components that would otherwise be required, directly reducing the Bill of Materials while maintaining both functional capabilities.
Solution Approach 2:
The system employs universal components that perform multiple functions. The single antenna and demodulation circuitry serve both power reception and data communication needs, reducing the total quantity of components required compared to having separate dedicated systems for each function.
3Adaptability or versatility
If additional antennas are used for data communication, then data transfer capability is improved, but interference and cross-talk increase
Solution Approach 1:
The patent combines power and data functions in a single channel, eliminating the presence of multiple transmitting antennas that would generate interference and cross-talk. The demodulation circuit extracts data from the power transfer signals without requiring separate communication transmitters, thus avoiding the harmful electromagnetic interactions between multiple antennas.
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 solution significantly reduces the computational burden and BOM of wireless transmission systems, enabling the use of less capable processors while minimizing interference and enhancing the positional freedom of sensors by eliminating the need for separate data transmission paths.
Implementation Method 1
These transmitting and receiving elements will often take the form of coiled wires and/or antennas. Transmission of one or more of electrical energy, electrical power, electromagnetic energy and/or electronic data signals from one of such coiled antennas to another
Implementation Method 2
which occurs when magnetic fields created by a transmitting element induce an electric field and, hence, an electric current, in a receiving element
Data Source
AI summary
A sensing system includes a sensor, a wireless transmission system, a wireless receiver system, and a controller. The sensor is configured to determine sensor data, the sensor data associated with a sensing environment. The wireless transmission system is configured to wirelessly couple with the sensor, the wireless transmission system configured for wirelessly providing significant electrical energy to the sensor as wireless power signals and receive the sensor data as in-band data signals encoded in the wireless power signals. The wireless receiver system is operatively associated with the sensor and with which the wireless transmission system couples with the sensor and is configured to receive the significant electrical energy as the wireless power signals from the wireless transmission system. The controller is operatively associated with the wireless transmission system and is configured to decode the in-band signals from the wireless power signals as the sensor data.