Reduction of temperature influence caused by pressure of sound velocity in gas

A technology of gas and gas molecules, applied in the use of sound waves/ultrasonic waves/infrasonic waves for material analysis, measuring devices, instruments, etc.

Active Publication Date: 2011-01-19
MAQUET CRITICAL CARE
View PDF12 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This prior art addresses the problem of minimizing standing acoustic waves in the measurement chamber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Reduction of temperature influence caused by pressure of sound velocity in gas
  • Reduction of temperature influence caused by pressure of sound velocity in gas
  • Reduction of temperature influence caused by pressure of sound velocity in gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] Measuring chamber

[0074] In a preferred embodiment, the invention is realized by means of a measuring chamber for temporarily containing the gas to be measured. Preferably, the chamber is mounted such that a gas flow passes through the chamber and measurement sampling is intermittently performed on the flowing gas. A functional requirement for the measuring chamber is that the chamber-defining substance should act as a thermal buffer and have an efficient heat exchange with the gas molecules. The higher the achieved heat exchange efficiency, the more the speed of the temperature equilibration process increases and the better the effect of the invention.

[0075] figure 1 A measuring device 1 according to the invention is shown schematically. The measuring chamber 2 defined by the chamber-defining structure 5 has a cavity 4 with a space of gas in which ultrasonic waves propagate from the ultrasonic transmitter to the ultrasonic receiver. exist figure 1 In the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses equipment for determining the proportion of gas in a gas mixture, comprising a measuring chamber, an ultrasonic wave source and an ultrasonic wave detector and a temperature sensor. The measuring chamber is provided with a chamber limiting structure containing a high heat conduction material, a gas inlet and a gas outlet, wherein the material is metal; the ultrasonic wave source and the ultrasonic wave detector are mounted to enable the ultrasonic wave source to transmit the ultrasonic wave to the ultrasonic wave detector through the measuring chamber; and the temperature sensor is mounted to enable the sensor to sense the temperature in the measuring chamber, wherein the measuring chamber has a tubular cavity with a radius r0 of 1-8mm so as the make the distance between gas in the measuring chamber and an inner wall of a tube, and the measuring chamber is designed so as to make the gas to be measured to tightly contact a rigid surface of an object with thermal inertia and good heat conduction, thus the heat can free move to a surrounding structure from the gas.

Description

[0001] This patent application is a divisional application of the invention patent application with the international filing date of June 17, 2005 and the national application number of 200580050144.7 entitled "Reduction of temperature influence induced by pressure on sound velocity in gas". technical field [0002] The present invention generally relates to the measurement of the speed of sound in gas mixtures. More specifically, the invention relates to the application of ultrasonic detectors, for example, to the measurement of gas concentrations or gas flows in environments where pressure-induced temperature influences are a dominant factor in the accuracy of the measurements. Background technique [0003] In some applications of ultrasonic testing, such as measuring the concentration or ratio of gas components in a gas mixture, the pressure change of the gas mixture has a great influence on the measurement accuracy. There is a well-known relationship between sound veloci...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01N29/024G01N29/32G01N29/22
Inventor 埃里克·卡尔德柳斯
Owner MAQUET CRITICAL CARE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap