Calibration Verification Using Intermediary Parameter Sources
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Solution Overview
Problem
The high cost and logistical challenges of maintaining verified sources for calibration of measurement instruments, as well as the uncertainty in indirect adjustment methods without a verified source for each value of interest, necessitate a more efficient verification method.
Innovation Solution
A method involving multiple measurement instruments, a verified parameter source, and an un-verified parameter source, where instruments measure and compare test values to determine an adjustment verification state, minimizing the need for multiple verified sources and relying on internal circuitry assumptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple verified sources are used for calibration of each measurement instrument, then measurement precision is improved, but cost and device complexity increase
Solution Approach 1:
An un-verified parameter source is introduced as an intermediary to enable indirect calibration. Instead of requiring direct verification for each instrument, the un-verified source serves as a common reference that multiple instruments measure, allowing verification through comparison of measurements across instruments rather than through direct calibration against multiple verified sources
Solution Approach 2:
Multiple measurement instruments copy the measurement process by measuring the same un-verified test value from the un-verified parameter source. By comparing these copied measurements, the system verifies adjustment without requiring each instrument to be directly calibrated against a unique verified source, reducing the number of verified sources needed
2Reliability
If multiple verified sources are maintained for calibration, then reliability of calibration is improved, but maintenance cost and time increase
Solution Approach 1:
The un-verified parameter source acts as a mediator that eliminates the need to maintain multiple verified sources. By using this single un-verified source and comparing measurements across multiple instruments, the system achieves calibration verification without the time-consuming maintenance of multiple verified sources
Solution Approach 2:
The system performs self-verification by having multiple instruments measure the same un-verified test value and comparing results. This self-service approach allows instruments to verify each other's calibration status without requiring external verification resources, reducing maintenance time and effort
3Device complexity
If indirect adjustment is used without verified source for each value, then device complexity is reduced, but measurement precision deteriorates due to uncertainty
Solution Approach 1:
The system implements feedback by comparing measurements from multiple instruments measuring the same un-verified test value. This comparison provides feedback on the consistency and reliability of indirect adjustments, allowing verification of adjustment states without requiring verified sources for each value while maintaining measurement precision through statistical analysis of the comparison results
Data Source
AI summary
A method for verifying the adjustment of a plurality of measurement instruments includes measuring a first value of an un-verified test value of a parameter with a first measurement instrument; measuring a second value of the same un-verified test value of a parameter with a second measurement instrument; comparing the first value with the second value; and determining an adjustment verification state based on the comparison.