Title:
DENSITY MEASURING DEVICE FOR ULTRA-LOW TEMPERATURE FLUID
Document Type and Number:
Japanese Patent JP3652890
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To prevent generation of errors in a measured result caused by variation of a light path length in antennas for introducing a microwave into an ultra-low temperature fluid, in a density measuring device for measuring a density of the very low temperature fluid, based on a dielectric constant provided by introducing the microwave into the ultra-low temperature fluid such as slush hydrogen to measure the dielectric constant.
SOLUTION: A pair of patch antennas 1 are immersed to be faced each other into slush hydrogen 3 for measuring density, microwave is introduced in one of the antenna 1 through a coaxial cable 2, and it is received by the other of the antennas 1. The dielectric constant of the slush hydrogen 3 is found based on a phase change of the microwave passing through the inside of the slush hydrogen 3 existing between the antennas 1, and a density of the slush hydrogen 3 is measured based on the dielectric constant.
More Like This:
| WO2008076444 | REFINED OPTICAL SYSTEM |
| JP2572235 | [Title of Invention] Wavelength control device |
| JPH11211562 | IMAGE PROCESSING DEVICE AND CONTROL DEVICE |
Inventors:
Kenji Nakamichi
Application Number:
JP19430698A
Publication Date:
May 25, 2005
Filing Date:
July 09, 1998
Export Citation:
Assignee:
MITSUBISHI HEAVY INDUSTRIES,LTD.
International Classes:
G01J9/00; G01N9/24; G01N22/00; (IPC1-7): G01N22/00; G01N9/24
Domestic Patent References:
| JP9159595A | ||||
| JP7014870Y2 | ||||
| JP7035670A | ||||
| JP5012691Y2 |
Other References:
D.A.Ellerbruch,MICROWAVE METHODS FOR CRYOGENIC LIQUID AND SLUSH INSTRUMENTATION,Advances in Cryogenic Enginnering,1971年,Vol.16,p.241-250
Attorney, Agent or Firm:
Shin Ishikawa
Akira Ishikawa
Akira Ishikawa
Previous Patent: METHOD AND DEVICE FOR ENCODING VIDEO, RECORDING MEDIUM AND VIDEO COMMUNICATION SYSTEM
Next Patent: FOUR-WHEELED VEHICLE
Next Patent: FOUR-WHEELED VEHICLE