Unified Calibration Method for Multi-Product Measuring Devices
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Solution Overview
Problem
Existing calibration methods for measuring devices require separate calibration for each product, leading to increased effort and susceptibility to measurement inaccuracies due to statistical fluctuations and insufficient data variance.
Innovation Solution
A method that combines the measured values of multiple products into an extended set, allowing for the determination of product-independent weights and offset values, which are then used to calibrate the measuring device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate calibration is performed for each product, then product-specific calibration accuracy is maintained, but calibration effort and time increase significantly
Solution Approach 1:
The patent combines measured values from multiple products into an extended data set and performs a single unified calibration procedure. By merging the calibration processes of multiple products, the method reduces the total calibration time while maintaining accuracy through the use of product-independent weights that are determined from the combined data.
Solution Approach 2:
The patent develops a universal calibration approach where a single calibration procedure serves multiple products within a product family. The method identifies product-independent calibration parameters that can be applied across different products, making the calibration process multi-functional rather than product-specific.
2Measurement precision
If separate calibration is performed for each product, then product-specific characteristics are captured, but susceptibility to measurement inaccuracies increases
Solution Approach 1:
By combining measured values from multiple products into an extended data set, the patent increases the overall data volume and variance. This merging reduces the impact of statistical outliers and measurement errors in individual products, as the larger combined data set provides more robust statistical basis for determining calibration parameters.
Solution Approach 2:
The patent changes the calibration parameters from product-specific to product-independent by analyzing the extended data set. This parameter transformation allows the calibration to be less sensitive to variations and errors in individual product measurements, improving reliability through parameter generalization.
3Measurement precision
If product-specific calibration parameters are used, then calibration accuracy for each product is optimized, but the number of calibration parameters increases
Solution Approach 1:
The patent extracts product-independent calibration parameters from the extended data set by analyzing which parameters remain consistent across multiple products. This extraction process identifies the core calibration parameters that are common to all products in the family, eliminating the need for separate product-specific parameters.
Solution Approach 2:
The patent establishes universal calibration parameters that function across multiple products within a product family. By making the calibration parameters universal rather than product-specific, the method reduces the total number of parameters while maintaining calibration accuracy through the use of the extended combined data set.
Data Source
Figure 1
AI summary
Method for calibrating a measuring device for a plurality of products, which method has the following steps of: measuring a set of measured values (Xp={xpij}) having one or more measurement variables (j) for a plurality of products (p) and having a plurality of measurements (i), providing a set of reference variables (Yp ={xpi i-th reference variable} ) having at least one reference variable (Y) to be determined by the measurement variables (xpij), with - combining the measured values (X p ) for all products to form an expanded matrix of the measured values (X' ), - determining a first set of calibration parameters (C') having one or more weights (I) for one or more products (p), wherein the one or more products (p) are combined within a product family having a weight (cj) which is the same at least for the products of the product family and is independent of the product, - determining at least one further set of calibration parameters (C") for a submatrix of the expanded matrix of the measured values (X') for the purpose of calibrating the measuring device, wherein o one or more sets having further weights are determined within the first product family and a plurality of products (p) having the same weights (I) are combined to form a further product family, and o further sets having further weights are determined outside the first product family and a plurality of products (p') having the same weights (II) are combined to form a further product family o until all weights for calibrating the measuring device have been determined.