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公开(公告)号：US11480520B2
公开(公告)日：2022-10-25
申请号：US16641599
申请日：2018-07-20
Inventor： Hirotaka Matsunami , Masanori Hayashi , Toru Baba , Yoshifumi Watabe , Noriyuki Yasuike , Takashi Nakagawa
IPC: G01N21/3554 , G01W1/02 , G01W1/14 , G01F22/00
Abstract: A water content sensor includes: a light emitter that emits detection light having a first wavelength band and reference light a second wavelength band toward a road surface; a first light receiver that converts the detection light reflected by the road surface to a first electric signal; a second light receiver that converts the reference light reflected by the road surface to a second electric signal; and a computation processor that detects the amount of water based on a signal ratio between the first electric signal and the second electric signal. The computation processor detects the amount of water based on the signal ratio obtained when the signal intensity of at least one of the first electric signal and the second electric signal is within a predetermined range defined relative to a reference value.
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公开(公告)号：US11199493B2
公开(公告)日：2021-12-14
申请号：US16642355
申请日：2018-07-20
Inventor： Yoshifumi Watabe , Ryo Arakawa , Toru Baba
Abstract: A functional water concentration sensor includes: a light source which emits ultraviolet light; a container capable of holding functional water having a pH between 6 and 9, inclusive, and containing hypochlorous acid and hypochlorite dissociated from the hypochlorous acid; a light-receiving element; and a signal processor. The signal processor calculates the concentration of the hypochlorite in the functional water on the basis of the output signal, calculates the percentages of the hypochlorous acid and the hypochlorite in the functional water on the basis of the pH of the functional water and the dissociation constant of the hypochlorous acid, and calculates the concentration of the hypochlorous acid in the functional water on the basis of the calculated hypochlorite concentration and the calculated percentages.
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公开(公告)号：US10180395B2
公开(公告)日：2019-01-15
申请号：US15562790
申请日：2016-06-15
Inventor： Yoshifumi Suehiro , Toru Baba , Shin Okumura , Takaaki Yoshihara
Abstract: A functional water concentration sensor includes: a container used to contain functional water; a light source that emits ultraviolet light; a phosphor that emits fluorescence when excited by ultraviolet light emitted from the light source and transmitted through the container; and a light-receiving element that receives the fluorescence, wherein a peak wavelength of the ultraviolet light emitted from the light source is in a predetermined range that includes an absorption peak specific to the functional water.
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