公开(公告)号：US20230023301A1

公开(公告)日：2023-01-26

申请号：US17757427

申请日：2020-11-02

申请人： TOHOKU UNIVERSITY

发明人： Kazue Kurihara ,  Masashi Mizukami ,  Motohiro Kasuya

IPC分类号： G01N11/10

摘要： There are provided a viscometer that can accurately measure a bulk viscosity of a small amount of a liquid sample such as 100 μL or less, and a method for measuring viscosity. A viscometer (1) comprises a fixing member (31), an upper unit (10), a lower unit (11), and an information processing unit (50). A method for measuring viscosity comprises measuring a viscosity of the sample by measuring a response voltage during resonance from a detecting means (19) that detects displacement of a leaf spring (17) in one direction due to vibration of the upper unit (10) through applying an AC voltage to a piezoelectric element (15) while changing a frequency by the information processing unit (50).

公开(公告)号：US20220155202A1

公开(公告)日：2022-05-19

申请号：US17593222

申请日：2019-03-28

申请人： TOHOKU UNIVERSITY

发明人： Kazue Kurihara ,  Masashi Mizukami ,  Motohiro Kasuya

IPC分类号： G01N11/16 ,  G01N3/24

摘要： A resonance shear measurement device (1) of the present invention includes an upper unit (10) having a piezoelectric element (15), an upper disk substrate (16), and a spring (17), and a lower unit (11) having a lower disk substrate (14), in which a sample insertion portion (21) is formed between a lower surface of the upper disk substrate (16) and an upper surface of the lower disk substrate (14), the piezoelectric element (15) and the upper disk substrate (16) are vibratably connected to a fixed apparatus 30 via the spring (17), a strain gauge (19) is attached to the spring (17), and by applying an AC voltage to the piezoelectric element (15) while changing a frequency of the AC voltage, a response voltage at the resonance from the strain gauge (19) due to a vibration of the upper unit (10) is measured.