Modular Component Calibration with Shared ADC and Swappable Extensions
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Solution Overview
Problem
In industrial motion control, existing systems face challenges in cost reduction and user convenience due to the need for fixed matching of main and extension modules for calibration data storage, with high hardware costs when additional ADC sampling circuits are implemented on the extension module.
Innovation Solution
A component design where the main module shares an ADC sampling circuit with the extension module, allowing flexible switching of extension modules and reducing manufacturing costs, with calibration data stored independently on each module and communicated via I2C or SPI protocols.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If calibration data is stored on the main module or extension module in a fixed matching mode, then calibration accuracy is maintained, but user flexibility and convenience deteriorate
Solution Approach 1:
The patent divides calibration data into two segments: first calibration data stored on the extension module (related to extension module components) and second calibration data stored on the main module (related to main module components including ADC sampling circuit). This segmentation allows each module to independently manage its own calibration parameters, enabling flexible module replacement while maintaining overall calibration accuracy through the combination of both calibration data sets.
Solution Approach 2:
The main module is designed with universal calibration capability by storing second calibration data that applies to multiple different extension modules. The controller on the main module can read and apply calibration data for different extension module models, making the main module universally compatible with various extension modules while maintaining calibration accuracy through the stored second calibration data.
2Reliability
If an additional ADC sampling circuit is implemented on the extension module, then calibration independence is achieved, but hardware cost increases
Solution Approach 1:
The patent merges the ADC sampling circuit function into the main module, where a single ADC sampling circuit serves multiple extension modules. This consolidation eliminates the need for each extension module to have its own ADC sampling circuit, significantly reducing hardware costs while maintaining calibration independence through separate calibration data storage and the ability to apply appropriate calibration parameters for each extension module type.
Solution Approach 2:
The main module's ADC sampling circuit is designed with universal functionality to handle sampling for multiple different extension modules. The circuit can be configured through software/firmware to work with different extension module types, eliminating the need for dedicated hardware ADC circuits on each extension module while maintaining measurement reliability through proper calibration.
Data Source
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AI summary
Provided is an extension module for independently storing calibration data, including: a first interface (101), adapted to receive a first external input signal; a second interface (102), adapted to output the first output signal of the extension module; a signal processing circuit (103), connected between the first interface (101) and the second interface (102); and a first memory (104), the first memory (104) storing first calibration data, and the first calibration data being associated with the extension module (10). Furthermore, also provided is a component using the above extension module, and a component calibration method. On the one hand, the extension module may share an ADC sampling circuit (204) on a main module (20), so that the manufacturing cost of the extension module is reduced. On the other hand, it can facilitate the replacement of different extension modules for the main module without repeated calibration.