Method for determining pressure in a vacuum switching tube and pressure measuring device
By applying electric and magnetic fields with specific orientations and fitting the current data set with functions, the method addresses inaccuracies in vacuum pressure measurement, achieving exceptionally high precision.
DE102025107645B3Active Publication Date: 2026-05-28SIEMENS ENERGY GLOBAL GMBH & CO KG
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Patent Information
- Application Number
- DE102025107645
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-05-28
- Estimated Expiration
- 2045-02-28
AI Technical Summary
Technical Problem
Existing methods for determining vacuum pressure in vacuum switching tubes are inaccurate due to superimposed oscillations in the gas discharge current, leading to inaccuracies in pressure measurement.
Method used
A method involving the application of an electric and magnetic field with differing orientations in the vacuum switching tube to generate a gas discharge, measuring current at multiple times, creating a data set, and fitting it with a function to deduce vacuum pressure using fitting parameters, thereby improving accuracy.
Benefits of technology
Enables precise determination of vacuum pressure by filtering out oscillations and using fitting functions to adapt the current data set, resulting in exceptionally high precision pressure measurements.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to a method for determining a pressure in a vacuum switching tube (1), comprising the steps of: providing the vacuum switching tube, which has a first electrode (3) and a second electrode (4), which have a contact state in which the first electrode and the second electrode are in contact with each other, and a spaced-away state in which the electrodes are spaced apart from each other, and a housing (2) which defines an interior space (26) in which the electrodes are arranged and which maintains a vacuum in the interior space, so that in the spaced-away state the electrodes are electrically isolated from each other by the vacuum; applying an electric field (23) and a magnetic field (24) to the interior space, so that a gas discharge is generated, wherein the orientation of the electric field in the interior space is different from the orientation of the magnetic field; measuring a current (I) of the gas discharge at a plurality of different times (t);Forming a measurement data set (I(t)) from the currents and the times, wherein the measurement data set represents the temporal evolution of the current during the gas discharge; fitting at least a part of the measurement data set with at least one fitting function (43) which has one or more fitting parameters; inferring the pressure from at least one of the fitting parameters.
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