Wireless Memory Access for Failed Electrical Unit Diagnostics
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Solution Overview
Problem
Existing electrical units, such as field devices, face challenges in troubleshooting and data retrieval after a total failure due to environmental influences or operator errors, leading to destruction of microcontroller-based electronic circuits, making it difficult to determine the cause of failure.
Innovation Solution
Incorporating a memory module connected to a microcontroller with a wireless interface in the electrical unit to store data, allowing data to be read wirelessly even if the unit is non-functional, using RFID or NFC technology, enabling post-mortem analysis of failure causes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical and structural protective measures (housings, seals, potting) are used to protect electronic circuits, then reliability against environmental influences is improved, but device complexity increases
Solution Approach 1:
The electronic circuit is segmented into two functional parts: a protected microcontroller and a separately accessible memory module. The memory module can be accessed independently via wireless interface even when the microcontroller is inaccessible, allowing troubleshooting without requiring the entire device to be functional.
Solution Approach 2:
A wireless interface acts as an intermediary between the memory module and external readers. This intermediary allows data access without mechanical intervention or physical disassembly of protected components, resolving the contradiction between protection and accessibility.
2Loss of information
If data is stored in the electrical unit during operation, then information availability is improved, but accessibility of data after total failure deteriorates due to circuit destruction
Solution Approach 1:
The memory module is designed to store data in advance during normal operation. This preliminary data storage ensures that even if the microcontroller is destroyed later, the data remains preserved and accessible through the wireless interface without requiring the microcontroller to be functional.
Solution Approach 2:
Traditional mechanical data access methods (requiring physical access to the microcontroller or disassembly) are replaced with wireless electromagnetic field-based access. This substitution allows data retrieval without mechanical intervention, solving the accessibility problem after failure.
3Ease of repair
If a wireless interface is added to enable data reading, then ease of troubleshooting is improved, but device complexity increases
Solution Approach 1:
The wireless interface serves multiple functions: it enables data reading during normal operation and continues to function for data retrieval after failure. This multi-functionality justifies the added complexity by providing both operational and diagnostic benefits without requiring separate systems.
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 easier troubleshooting by allowing data retrieval and analysis of failure causes without mechanical intervention, providing valuable information for maintenance and avoiding warranty claims.
Implementation Method 1
using RFID or NFC technology
Implementation Method 2
using RFID or NFC technology
Data Source
Figure 1
AI summary
The present invention relates to an electrical unit with a microcontroller-based electronic circuit, comprising a memory chip connected to the microcontroller, which is configured to store data during the operation of the electrical unit, wherein a wireless interface is provided via which the data can be read from the memory chip, and a method for reading device parameters of an electrical unit.