Title:
乾燥度センサ
Document Type and Number:
Japanese Patent JP6712792
Kind Code:
B2
Abstract:
A dryness sensor (1) is provided with the following: a first bandpass filter (32) that extracts a first wavelength range of light the amount of which that is absorbed by water being large; a second bandpass filter (42) that extracts a second wavelength range of light the amount of which that is absorbed by water being less than that of the first wavelength range of light; a first light-receiving unit (33) that converts the first wavelength range of light, which was reflected by an object (2) and passed through the first bandpass filter (32), to a first electrical signal; a second light-receiving unit (43) that converts the second wavelength range of light, which was reflected by the object (2) and passed through the second bandpass filter (42), to a second electrical signal; and a calculation processing unit (56) that detects the dryness of the object (2) on the basis of the first electrical signal and the second electrical signal. The center wavelength of the first wavelength region and the center wavelength of the second wavelength region are a combination selected from 1400-1600nm wavelengths and are a combination by which a signal ratio change according to each of a plurality of material candidates constituting the object (2) can be obtained.
Inventors:
Yoshifumi Watanabe
Hiroki Matsunami
Toru Baba
Hiroki Matsunami
Toru Baba
Application Number:
JP2019501256A
Publication Date:
June 24, 2020
Filing Date:
February 15, 2018
Export Citation:
Assignee:
Panasonic IP Management Co., Ltd.
International Classes:
G01N21/3554; G01N21/27
Domestic Patent References:
| JP10232200A | ||||
| JP61500931A | ||||
| JP6123700A |
Foreign References:
| WO2016015765A1 |
Other References:
新田光善 ほか,布地の近赤外スペクトル,分子構造総合討論会2003講演要旨集,2003年 9月20日,4Pp063
Attorney, Agent or Firm:
Hiromori Arai
Eisaku Teratani
Shinichi Michisaka
Eisaku Teratani
Shinichi Michisaka