Device and method for measuring volume ratio of vacuum container

A technology of a vacuum container and a measurement method, which is applied in the measurement field, can solve the problems of difficulty in estimating measurement uncertainty, large randomness of the volume ratio measured by the weighing method, and inconvenient volume change.

Active Publication Date: 2013-04-03
NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, once the equipment is assembled, it is inconvenient to use this method to determine the volume change that occurs during the installation of the valve.
The randomness of the volume ratio measured by the weighing method is large, and the relative measurement uncertainty is difficult to estimate

Method used

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  • Device and method for measuring volume ratio of vacuum container
  • Device and method for measuring volume ratio of vacuum container
  • Device and method for measuring volume ratio of vacuum container

Examples

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Embodiment 1

[0053] like figure 1 As shown, a device for measuring the volume ratio of a vacuum container, the device includes: a gas cylinder 1, a first vacuum valve 2, a plenum chamber 3, a second vacuum valve 4, a small container of unknown volume 5, and a first thermometer group 6. The third vacuum valve 7, the large container of unknown volume 8, the second thermometer group 9, the vacuum gauge 10, the fourth vacuum valve 11 and the air extraction system 12;

[0054] Among them, the gas cylinder 1, the first vacuum valve 2, the plenum chamber 3, the second vacuum valve 4, the small container 5 of unknown volume, the third vacuum valve 7, the large container 8 of unknown volume, and the vacuum gauge 10 are connected in sequence; The gas system 12 is connected to the small container 5 of unknown volume through the fourth vacuum valve 11; the first thermometer group 6 is housed in the small container 5 of unknown volume, and the second thermometer group 9 is housed in the large container...

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PUM

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Abstract

The invention discloses a device and a method for measuring volume ratio of a vacuum container and belongs to the technical field of measurement. The device comprises a gas cylinder, a first vacuum valve, a pressure stabilizing chamber, a second vacuum valve, a small container with unknown volume, a first thermometer group, a third vacuum valve, a large container with unknown volume, a second thermometer group, a vacuum gauge, a fourth vacuum valve and a pumping system. The device is simple in structure and reduces the uncertainty of measurement by introducing temperature correction in the measurement process. The method is simple, the measurement cost is low, and the uncertainty of measurement is small.

Description

technical field [0001] The invention relates to a device and method for measuring the volume ratio of a vacuum container, belonging to the technical field of measurement. Background technique [0002] In a static expansion system, a basic method for determining the volume ratio of a container is the gravimetric method, that is, weighing the container before and after it is filled with liquid (usually distilled water) to calculate the absolute volume, and then calculate the volume ratio. In this method, due to the influence of air bubbles in the liquid and the dead space of the valve, it is difficult to measure the volume accurately. This phenomenon is especially serious for small volumes. Therefore, once the equipment is assembled, it is inconvenient to use this method to determine the volume change that occurs during valve installation. The randomness of the volume ratio measured by the weighing method is large, and the relative measurement uncertainty is difficult to est...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F17/00
Inventor 魏万印冯焱孙雯君张涤新
Owner NO 510 INST THE FIFTH RES INST OFCHINA AEROSPAE SCI & TECH
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