Measuring Device RFID Transponder Capacitive Coupling
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Solution Overview
Problem
Existing measuring devices using Transducer Electronic Data Sheets (TEDS) face limitations due to the need for a two-wire cable, which prevents simultaneous measurement and data storage operations, and are costly compared to alternative solutions.
Innovation Solution
A measuring device utilizing an RFID transponder capacitively coupled to an RFID write and read device via a signal conductor, allowing data storage and retrieval independently of the two-wire cable, with high-frequency electrical signals modulating data for transmission, thus replacing the TEDS and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a two-wire cable is used to supply power and transmit data, then electrical power and measurement values can be transmitted, but measurement and TEDS writing/reading cannot occur simultaneously
Solution Approach 1:
The patent divides the data communication function into two separate pathways: a dedicated RFID wireless communication path for TEDS operations and the existing two-wire cable path for power supply and measurement value transmission. This segmentation allows both measurement and data writing/reading to occur simultaneously without electrical interference, resolving the contradiction between simultaneous operation capability and device complexity.
Solution Approach 2:
The RFID transponder acts as an intermediary between the sensor arrangement and the evaluation system, enabling wireless data exchange. This intermediary eliminates the need for the two-wire cable to carry both power and data, allowing measurement signals and TEDS operations to proceed independently through different communication channels, thereby achieving simultaneous operations.
2Quantity of substance
If TEDS is used for storing sensor data, then sensor-specific data can be stored and read out, but cost and storage capacity limitations exist
Solution Approach 1:
The patent replaces the expensive TEDS with a cheaper RFID transponder that has equivalent or superior storage capacity. The RFID transponder serves as a copy or alternative implementation of the TEDS functionality, providing the same sensor-specific data storage capability at lower cost and with greater storage capacity, thus resolving the contradiction between storage capacity and cost.
3Ease of operation
If RFID transponder is capacitively coupled via signal conductor, then data can be transmitted wirelessly, but high-frequency electrical signals are required
Solution Approach 1:
The signal conductor serves multiple functions: it transmits the measurement signal from the sensor arrangement to the amplifier arrangement, and simultaneously serves as the capacitive coupling path for RFID wireless data communication between the RFID transponder and write/read device. This multi-functionality eliminates the need for separate wiring for RFID communication, reducing overall system complexity while enabling wireless operation.
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 RFID transponder provides greater storage capacity at lower costs, eliminating the need for an antenna and enabling simultaneous measurement and data operations, enhancing the accuracy and efficiency of the measurement process.
Implementation Method 1
The RFID transponder is capacitively coupled to the RFID write and read device via the signal conductor
Implementation Method 2
The electrical generator circuit is configured to modulate data onto the high-frequency electrical signals for transmission via the signal conductor
Data Source
AI summary
A measuring device for measuring a physical quantity includes a sensor arrangement connected by a signal conductor to an amplifier arrangement. The sensor arrangement generates a measurement signal and includes an RFID transponder. The amplifier arrangement includes an RFID write and read device that is capacitively coupled to the RFID transponder. Data for transmission via the signal conductor are modulated onto high-frequency electrical signals.