3results about "Vacuum gauge using ionisation effects" patented technology

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.

This invention discloses a method for detecting the vacuum degree of a circuit breaker based on electron collision radiation inversion, belonging to the field of power equipment testing. The method includes the following steps: Step S1, synchronously acquiring X-ray pulse signals from multiple measuring points outside the arc-extinguishing chamber of the vacuum circuit breaker, extracting and parameterizing the pulse events to obtain the temporal distribution characteristics reflecting electron collision behavior; Step S2, establishing a feature enhancement model based on electron collision probability; Step S3, establishing a mapping model between the X-ray generation mechanism and the electron collision process, and then inverting the vacuum degree. This invention provides a method for detecting the vacuum degree of a circuit breaker based on electron collision radiation inversion. By establishing a physical mapping relationship between the statistical characteristics of X-ray pulse events and the electron mean free path and collision probability, it achieves quantitative inversion of the vacuum degree, thereby improving detection accuracy and physical interpretability.

A wide-range vacuum measurement composite gauge tube, comprising an ultrahigh vacuum sensing assembly (1), a medium vacuum sensing assembly (2), a low vacuum sensing assembly (3), and a shielding assembly. The shielding assembly comprises a shielding plate (4), a shielding cylinder (5), and an outer shielding flange cylinder (6), wherein the shielding plate (4) is disposed at a middle position inside the outer shielding flange cylinder (6); one end of the shielding cylinder (5) is connected to the shielding plate (4), and the other end thereof is fixed to the bottom face of the outer shielding flange cylinder (6) in a sealed and penetrating manner; the ultrahigh vacuum sensing assembly (1) is fixedly disposed above the shielding plate (4); the medium vacuum sensing assembly (2) is fixedly disposed below the shielding plate (4) and is located on one side of the shielding cylinder (5); and the low vacuum sensing assembly (3) is fixedly disposed below the shielding plate (4) and is located on the other side of the shielding cylinder (5).