DC Voltage Calibration Circuit for Multifunction Meter
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Solution Overview
Problem
Multifunction meter calibrators require extensive time and resources for calibrating multiple points of DC voltage, as conventional calibration methods necessitate direct comparison with national standards at various points, increasing costs and time consumption.
Innovation Solution
A DC voltage function calibration device and method utilizing two meter calibrators and a digital multimeter, where the DC voltage calibration circuit controls calibration through up-converting or down-converting voltage values based on a reference value, allowing for the calibration of a wide range of points using a combination voltage as a reference, thereby reducing the need for multiple standard device calibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct comparison calibration is performed at multiple DC voltage points using conventional methods, then calibration accuracy is maintained, but calibration time and cost increase significantly
Solution Approach 1:
The patent introduces a DC voltage calibration circuit as an intermediary device between the meter calibrator and the digital multimeter. This calibration circuit generates precise DC voltage signals at multiple points based on a single reference calibration, eliminating the need for direct comparison at each point while maintaining accuracy through mathematical relationships and circuit-based voltage generation.
Solution Approach 2:
The patent performs preliminary calibration at a single reference point using the conventional direct comparison method. Once this reference calibration is established, the DC voltage calibration circuit uses this single reference to generate and calibrate multiple other voltage points through up-conversion and down-conversion, avoiding repeated time-consuming direct comparisons.
2Measurement precision
If direct comparison calibration is performed at multiple DC voltage points using conventional methods, then calibration accuracy is maintained, but calibration cost increases
Solution Approach 1:
The DC voltage calibration circuit serves as a cost-effective intermediary that replaces multiple expensive direct comparison calibrations with a single reference calibration followed by circuit-based voltage generation, significantly reducing calibration costs while maintaining accuracy.
Solution Approach 2:
The patent creates copies of the reference calibration across multiple voltage points using the DC voltage calibration circuit. Instead of performing expensive direct comparisons at each point, the system copies the reference calibration data and uses mathematical relationships to generate accurate calibration values for all other points.
3Adaptability or versatility
If calibration is performed at a wide range of DC voltage points, then measurement coverage is improved, but the number of calibration points required increases
Solution Approach 1:
The DC voltage calibration circuit provides a universal solution that can generate and calibrate DC voltage signals across a wide range of points using a single reference calibration. The circuit is designed to handle multiple voltage levels and ranges, eliminating the need for separate calibration procedures at each point.
Solution Approach 2:
The patent changes the voltage parameter systematically using the DC voltage calibration circuit. By up-converting and down-converting the reference voltage, the system generates calibration signals at multiple voltage points, expanding measurement coverage without increasing the number of reference calibrations required.
Data Source
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AI summary
The inventive concept relates to a DC voltage function calibration device of a multifunction meter and a meter calibrator. The DC voltage function calibration device includes, a first meter calibrator configured to be calibrated to a reference value for a reference point and having a first plus terminal and a first minus terminal, a second meter calibrator configured to be calibrated to the reference value for the reference point and having a second plus terminal and a second minus terminal connected to the first minus terminal, a digital multi meter having a third plus terminal connected to the first plus terminal and a third minus terminal connected to the second plus terminal, and a DC voltage calibration circuit configured to control to calibrate a DC voltage for other points through up-converting or down-converting a voltage value using the digital multi meter based on the reference value set in the first meter calibrator and the second meter calibrator.