Title:
材料試験機および把持力検出方法
Document Type and Number:
Japanese Patent JP6866830
Kind Code:
B2
Abstract:
Provided are a material testing machine and a gripping force detecting method that can easily judge whether a test piece is gripped with an appropriate gripping force by a gripper. A controlling section (40) is connected to a FFT transforming section (41) via a load cell (14); FFT transforming section (41) calculates a natural frequency of a system comprising a test piece (10) and an upper gripper (21) which is connected to a load cell (14) based on a detected value of a force of the load cell (14). The controlling section (40) is connected to a storing section (43) which stores the natural frequency calculated by the FFT transforming section (41). The controlling section (40) is also connected to a comparing section (42) which compares the natural frequency calculated by the FFT transforming section (41) and the natural frequency stored by the storing section (43) before a test starts.
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Inventors:
Shogoro Iwakiri
Miyazaki
Miyazaki
Application Number:
JP2017224874A
Publication Date:
April 28, 2021
Filing Date:
November 22, 2017
Export Citation:
Assignee:
SHIMADZU CORPORATION
International Classes:
G01N3/04
Domestic Patent References:
| JP2002139411A | ||||
| JP2014018822A | ||||
| JP2001179620A | ||||
| JP2003121323A | ||||
| JP2019002828A |
Foreign References:
| US4445381 | ||||
| US5269181 | ||||
| US20180364139 |
Attorney, Agent or Firm:
Kyoto International Patent Office
Takashi Otsubo
Takashi Otsubo