Dual RFID Sensor Assembly for Environmental Measurement Error Reduction
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Solution Overview
Problem
Conventional RFID sensor assemblies face challenges in accurately detecting environmental parameters due to measurement errors caused by varying environmental conditions, which affect the reliability of sensed data.
Innovation Solution
The implementation of a dual RFID chip system, comprising a sensing RFID chip and a reference RFID chip, electrically coupled via a coupling arrangement that varies in response to sensed parameters, allowing for the determination of environmental conditions by comparing the power sensitivities of signals from both chips.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional RFID sensor assembly is used to sense environmental conditions, then the assembly can communicate environmental data to an RFID reader, but measurement errors occur due to varying environmental conditions affecting the reliability of sensed data
Solution Approach 1:
The RFID system is segmented into two distinct functional components: a sensing RFID chip that interacts with the environment and a reference RFID chip that remains isolated from environmental influences. This segmentation allows the system to separate the measurement function from the reference function, enabling error correction by comparing the sensing chip's signal characteristics against the stable reference chip's characteristics.
Solution Approach 2:
The reference RFID chip serves as an intermediary element that mediates between the varying environmental conditions and the measurement process. By providing a stable reference signal that is immune to environmental interference, it enables the system to distinguish between signal variations caused by environmental parameters and those caused by measurement errors or system instabilities.
2Adaptability or versatility
If environmental conditions vary, then the sensing chip detects different parameters, but power sensitivity varies causing measurement errors
Solution Approach 1:
The system utilizes parameter changes in the RF signals transmitted by both the sensing and reference chips to encode environmental information. By monitoring changes in signal parameters (such as amplitude, frequency, or phase) and comparing them between the sensing and reference paths, the system can determine environmental parameters while compensating for variations in power sensitivity.
Data Source
AI summary
In accordance with one embodiment, an RFID sensor assembly comprises a sensing RFID chip and a reference RFID chip. The sensing RFID chip and the reference RFID chip are configured for electrical coupling to an electronic component via a coupling arrangement. The coupling arrangement of the sensing RFID chip is configured to vary a coupling property in response to a sensed parameter.