RFID Field Device Communication for Error-Free Component Identification
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Solution Overview
Problem
Existing methods for identifying and managing individual components in decentralized industrial plants are complex, error-prone, and inflexible, leading to potential errors and shutdowns, especially when components are swapped or incorrectly positioned, and data transmission is not adequately protected.
Innovation Solution
A field device equipped with an internal RFID transponder and a communication unit, utilizing an alternating electromagnetic field for data transmission, allowing passive and active modes to facilitate error-free identification and communication with external devices, even when switched off or defective.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If components are identified by determining their topological positions within the industrial plant, then identification is achieved, but the system becomes complex, error-prone, and inflexible
Solution Approach 1:
The patent extracts the identification function from the complex topological positioning system and implements it through simple RFID tags attached to components. Each component carries a unique identifier that can be read directly by external RFID readers, eliminating the need for complex wiring diagrams and topological position determination while maintaining accurate identification.
Solution Approach 2:
The patent replaces the mechanical/wiring-based identification system with an electromagnetic field-based RFID system. Instead of using physical wiring diagrams and manual position tracking, the system uses RFID electromagnetic fields to automatically identify components, significantly reducing system complexity and error-proneness while maintaining identification accuracy.
2Measurement precision
If addresses and names are assigned to components using rotary encoder switches, then identification is achieved, but the process becomes complex and prone to errors
Solution Approach 1:
The patent replaces the mechanical rotary encoder switch system with contactless RFID technology. Instead of manually rotating encoders to assign addresses and names, the system uses RFID tags that store identification data and can be read wirelessly, eliminating manual configuration errors and simplifying the identification process.
Solution Approach 2:
The patent implements preliminary action by pre-configuring RFID tags with unique identifiers, addresses, and names before components are installed in the industrial plant. This eliminates the need for on-site configuration using rotary encoders, preventing errors during installation and maintenance while improving operational simplicity.
3Adaptability or versatility
If components are swapped or incorrectly positioned during installation or maintenance, then flexibility is improved, but errors and plant shutdowns occur
Solution Approach 1:
The patent implements feedback by using RFID readers to automatically verify component identifiers against the control system's expected configuration. When a component is swapped or moved, the system reads its RFID tag and automatically updates or validates its position and function, preventing errors and shutdowns while maintaining operational flexibility.
Solution Approach 2:
The patent enables dynamic adaptation by allowing the system to automatically recognize and adjust to component changes through RFID identification. When components are swapped or repositioned, the system dynamically updates its configuration based on the RFID data, maintaining both flexibility and reliability without requiring manual reconfiguration.
4Loss of information
If local passwords or security certificates are transmitted via conventional bus systems, then data transmission is achieved, but security protection is insufficient
Solution Approach 1:
The patent replaces the conventional wired bus system for transmitting security data with contactless RFID communication. Local passwords and security certificates are transmitted through RFID electromagnetic fields, which can be more securely controlled and authenticated, reducing vulnerability to interception and unauthorized access while maintaining full data transmission capability.
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
Enables simple, user-friendly, and error-free identification and data transfer of field devices, supporting seamless replacement and configuration without mechanical connections, enhancing security and reducing errors.
Implementation Method 1
The internal RFID transponder, e.g. an RFID tag, is designed to send data to an external device and/or receive data from an external device in a first operating mode of the field device by means of an externally provided alternating electromagnetic field
Implementation Method 2
The communication unit is also designed to generate an alternating electromagnetic field in a second operating mode of the field device, which can be used to send data to an external device and/or receive data from an external device
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a field device (24) for an industrial plant (10), comprising an internal RFID transponder (32) configured to transmit data to an external device (36) and/or receive data from an external device (36) in a first operating mode of the field device (24) by means of an externally provided alternating electromagnetic field (34). Furthermore, the field device (24) comprises a communication unit (38) configured to generate an alternating electromagnetic field (34) in a second operating mode of the field device (24) with which data can be transmitted to and/or received from an external device (36). The invention also relates to a system (26) with a first field device (24, 28) according to the invention and a second field device (24, 30) of identical construction, as well as a method for exchanging and a method for configuring a field device (24).