RFID Calibration Certificate Storage for Offline DCC Access
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Solution Overview
Problem
Existing measurement instruments lack the storage and processing capability for digital calibration certificates (DCC), rendering them unusable in offline conditions or network isolation, and existing RFID tags are insufficient to store complete DCC files.
Innovation Solution
The method involves simplifying DCC data to DCC-Lite, splitting it into multiple XML Lite files, and storing these files across multiple RFID tags, enabling them to be spliced and restored using an RFID reader-writer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If complete DCC files are stored in single RFID tags, then machine readability and data accessibility are improved, but storage capacity requirements exceed existing RFID tag limitations
Solution Approach 1:
The patent divides the complete DCC file into multiple smaller DCC-Lite files, each of which can be stored in individual RFID tags. This segmentation allows the calibration data to be distributed across multiple tags rather than requiring a single large-capacity tag, thus resolving the contradiction between data completeness and storage capacity limitations.
Solution Approach 2:
The patent combines multiple DCC-Lite files stored in separate RFID tags into a complete DCC file through a splicing process. By merging the fragmented data from multiple tags, the system achieves complete data accessibility while working within the storage constraints of individual tags.
2Ease of operation
If DCC data is stored in measurement instruments, then offline reading and application is enabled, but instrument complexity and storage requirements increase
Solution Approach 1:
The patent extracts the DCC data storage function from the measurement instrument itself and relocates it to external RFID tags. This extraction allows instruments to remain simple without built-in storage, while still enabling offline reading capability through the external tags that can be attached to or removed from the instruments.
Solution Approach 2:
The RFID tags serve as an intermediary between the measurement instrument and the DCC data storage system. This intermediary approach enables offline reading capability without requiring the instrument itself to have storage functions, thus maintaining instrument simplicity while achieving the desired operational capability.
3Adaptability or versatility
If DCC information is stored in MES or QMS systems, then unified management is achieved, but availability without network connection is lost
Solution Approach 1:
The patent creates a copy of the DCC data in RFID tags that can be read without network connection. This copy mechanism ensures that calibration information remains available offline while still maintaining integration with MES or QMS systems through the unique identification correspondence established in those systems.
Solution Approach 2:
The patent performs preliminary action by pre-storing DCC data in RFID tags before network disconnection occurs. This advance preparation ensures that calibration information is immediately available when network connection is lost, while the system maintains its integration with MES/QMS through the pre-established identification correspondence.
Data Source
AI summary
The present invention discloses a method for using RFID tags as carriers for digital calibration certificates and its system, which consists of following steps, i.e., generating standard DCC data; simplifying the DCC data to obtain the DCC-Lite data; after that, the DCC-Lite data is split into obtain multiple XML Lite files; and then, storing and writing multiple RFID tags in the multiple XML Lite files so that the DCC-Lite data can be spliced and restored by reading XML-Lite file information stored correspondence to the multiple RFID tags. The present invention realized unimpeded reading and application of instrument calibration information and data in the off-line state by means of simplifying, segmenting DCC files and storing them in multiple RFID tags respectively. Furthermore, the present invention may also split and store certain DCC-Lite with large amount of data in multiple RFID tags by splitting and splicing its content.