Wireless Sensor Power Link With In-Band ASK Data Demodulation
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Solution Overview
Problem
Existing wireless power and data transfer systems for sensors often require additional antennas and circuitry, leading to increased Bill of Materials (BOM), cost, interference, and space requirements, which complicates device design and increases electromagnetic interference (EMI).
Innovation Solution
A demodulation circuit is integrated into the wireless transmission system to decode amplitude shift keying (ASK) signals, reducing computational resources needed for data decoding and minimizing the BOM, while enabling efficient in-band communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional antennas and circuitry are used for wireless data communication, then data transfer capability is improved, but device complexity and BOM increase
Solution Approach 1:
The patent combines wireless power transfer and wireless data communication functions into a single antenna and circuit system. The same antenna used for receiving power signals also receives modulated data signals, and the same circuitry processes both power and data communications by detecting load modulation on the power signal line.
Solution Approach 2:
The wireless power receiver is designed to perform multiple functions: receiving power wirelessly and simultaneously receiving data communications through load modulation detection. The single antenna and circuit system serves both power transfer and data communication purposes, eliminating the need for separate dedicated components.
2Adaptability or versatility
If additional antennas and circuitry are used for wireless data transfer, then data communication is enabled, but cost increases due to increased BOM
Solution Approach 1:
The patent merges wireless power reception and wireless data communication into a single integrated system using one antenna and shared circuitry, thereby reducing the quantity of components required and lowering the bill of materials cost.
Solution Approach 2:
The receiver circuit is designed with universal functionality to handle both power transfer and data communication through a single interface, eliminating redundant components and reducing overall system cost.
3Adaptability or versatility
If additional antennas are used for data communication, then wireless connectivity is improved, but electromagnetic interference increases
Solution Approach 1:
By combining power and data communication through a single antenna, the patent eliminates multiple electromagnetic sources that would interfere with each other, reducing overall EMI while maintaining full wireless connectivity functionality.
4Adaptability or versatility
If additional circuitry is used for data decoding, then communication capability is improved, but computational resources required increase
Solution Approach 1:
The system uses self-service by detecting load modulation directly from the power signal line without requiring separate complex communication processing circuits. The receiver detects data by monitoring changes in the power signal characteristics, eliminating the need for additional automated data processing hardware.
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 demodulation circuit significantly reduces the BOM and computational requirements, minimizing interference and space usage, thus enhancing the efficiency and cost-effectiveness of wireless power and data transfer systems.
Implementation Method 1
Such systems often use inductive and/or resonant inductive wireless power transfer, which occurs when magnetic fields created by a transmitting element induce an electric field and, hence, an electric current, in a receiving element.
Implementation Method 2
A demodulation circuit is integrated into the wireless transmission system to decode amplitude shift keying (ASK) signals
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.