Title:
RADIO MEASUREMENT SYSTEM
Document Type and Number:
Japanese Patent JP2022021010
Kind Code:
A
Abstract:
To provide a radio measurement system capable of accurately measuring a physical quantity, such as a temperature of a detection object, by determining only a normal response signal even under an environment where noise is mixed into a response signal from a sensor, or even if there are plural phase candidates.SOLUTION: In a radio measurement system including a sensor 20 for allowing a surface acoustic device to excite surface acoustic waves by a drive signal from a master device 10 and for generating a response signal having propagation characteristics corresponding to a physical quantity operating on a detection object, where the master device 10 includes transmission/reception means 11 to 13 for transmitting and receiving a drive signal and a response signal and calculation means 14 for calculating a physical quantity from change in propagation characteristics detected from a response signal, the calculation means 14 determines a response signal to a differential signal when a ratio of reception strength to noise sensitivity obtained by a measurement signal obtained by performing discrete Fourier transform of the differential signal between a drive signal and a response signal goes lower than a predetermined threshold to be a noise-mixed signal, and calculates the physical quantity by excluding the noise-mixed signal.SELECTED DRAWING: Figure 1
More Like This:
| JPS56136470 | BATTERY CONTROL DEVICE |
| JP4862533 | Suspended particle measurement system |
| WO/1998/002926 | PIEZOELECTRIC SENSOR AND METHOD |
Inventors:
FURUICHI TAKUYA
KUDO TAKAHIRO
KUBOTA MASAO
KUDO TAKAHIRO
KUBOTA MASAO
Application Number:
JP2020124343A
Publication Date:
February 02, 2022
Filing Date:
July 21, 2020
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
G01N29/02; G01N29/46
Attorney, Agent or Firm:
Yuichi Morita
Previous Patent: On-site video management system and on-site video management method
Next Patent: Intermediate insertion type wing nut wrench
Next Patent: Intermediate insertion type wing nut wrench