Inductance value measuring and tracing device and method
By using standard capacitors in the bridge circuit to replace the measured inductor for measurement, the problems of reproduction accuracy and traceability link length are solved, and the direct traceability of the inductor value to the capacitance unit is realized, which improves the accuracy of inductor measurement Specifies and simplifies the magnitude transfer link.
CN119125686AActive Publication Date: 2024-12-13NATIONAL INSTITUTE OF METROLOGY CHINA
Patent Information
- Application Number
- CN202411305199.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-19
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2044-09-19
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Figure CN119125686A_ABST
Abstract
The invention provides an inductance value measuring and tracing device and method, the measuring device comprises a bridge circuit, in the bridge circuit, the-1 end of a bridge power supply is connected with a bridge auxiliary balance network and a bridge arm unit in sequence through a wire and then is connected to the + 1 end of the bridge power supply; the bridge arm unit comprises a first null indicator, a second null indicator and four bridge arms, a measured inductor and a first resistor (equivalent series resistor) are arranged in the first bridge arm, a second resistor is arranged in the second bridge arm, a fourth resistor is arranged in the fourth bridge arm, and a first inductive voltage divider, a second inductive voltage divider, a first conductor and a first capacitor are arranged in the third bridge arm. According to the inductance value traceability method, a 1:-1 inductive voltage divider is connected to the output end of a first inductive voltage divider, a standard capacitor is used for replacing a measured inductor for measurement, and at a specific frequency, a capacitor with the same impedance nominal value is used for replacing the measured inductor for measurement through an impedance conversion technology, so that the inductance value traceability is realized. The inductance value can be directly traced to the capacitance unit.
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Citation Information
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