Wireless Sensing System Using Wired RF Intermediary
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Solution Overview
Problem
Current RF-based systems for access control and communication are limited by the imbalance in forward and reverse communication links, requiring close proximity and specific orientation between the energizer/reader and RF devices, which restricts the effective range and efficiency due to regulatory power limitations and inefficiencies in energy transmission and signal processing.
Innovation Solution
A wireless sensing system with strategically distributed RF sensors and energizers, utilizing a wiring system for power and ground distribution, and air-linked RF signals to enhance the forward communication link, allowing for independent radiation patterns and efficient energy utilization, reducing the need for close proximity and improving communication link balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If RF energy emission is limited by regulations to 4 watts, then energy safety and compliance are improved, but the effective communication range deteriorates
Solution Approach 1:
The patent introduces wired conductors as an intermediary medium to carry RF signals from the energizer to the sensor. This hybrid wired-wireless approach allows the system to overcome RF propagation limitations while maintaining regulated emission levels, as the conductors efficiently transmit energy over distances without requiring high-power RF transmission.
Solution Approach 2:
The system segments the communication function into two parts: RF signaling for wake-up and data exchange, and wired conductors for power delivery and signal distribution. This segmentation allows each component to operate within its optimal range and regulatory constraints, improving overall system effectiveness without requiring excessive RF power.
2Reliability
If the energizer is located close to the RF device for effective energization, then communication reliability is improved, but system flexibility and deployability deteriorate
Solution Approach 1:
The wired conductor system acts as an intermediary that decouples the spatial relationship between energizer and sensor. The conductors can be routed through existing infrastructure (walls, ceilings, conduits) to deliver energy and signals to sensors located anywhere in the coverage area, providing both reliability and installation flexibility.
Solution Approach 2:
The patent transitions from purely wireless three-dimensional RF propagation to a hybrid system that utilizes the physical dimension of wired conductors. This allows energy and signals to be delivered along predetermined paths independent of line-of-sight constraints, expanding system flexibility while maintaining communication reliability.
3Device complexity
If RF signals are used for both power delivery and data communication, then system simplicity is improved, but energy efficiency and signal processing performance deteriorate
Solution Approach 1:
The system segments the energy and data transmission functions: wired conductors handle power delivery with high efficiency, while RF signals are used only for wake-up and data communication. This functional segmentation eliminates the energy inefficiencies of using RF for both purposes while maintaining system simplicity through the unified hybrid architecture.
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 enables robust and efficient wireless communication over a wider range, reducing the need for precise alignment and proximity, while optimizing energy use and improving the balance between forward and reverse communication links, enhancing the operational efficiency of RF systems.
Implementation Method 1
an energizer 13 effective to provide radio frequency signals to the wiring system 27
Data Source
AI summary
A wireless sensing system and method for wireless sensor interrogation are disclosed. The wireless sensing system includes a plurality of radio frequency sensors distributed within a predefined area, a wiring system with conductors distributed in proximity to the plurality of sensors for providing at least one of electrical power and ground distribution, and a forward communication link with an energizer air link coupled to the wiring system. The method for wireless sensor interrogation includes providing a plurality of radio frequency sensors distributed within a predefined area, providing a forward communication link including an energizer coupled to a wiring system with conductors in proximity to the plurality of sensors for providing at least one of electrical power and ground distribution, transmitting radio frequency signals through the wiring system and air linking transmitted radio frequency signals to the plurality of radio frequency sensors through the conductors.