Title:
MATERIAL TESTING MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/011173
Kind Code:
A1
Abstract:
Disclosed is a material testing machine that, by means of reducing fluctuations in testing force at a plastic region, can prevent the effect of noise to obtain appropriate test results. The material testing machine is provided with: a displacement meter (15) that measures the amount of displacement of the distance between reference points of a test piece (10); a measurement means that measures the amount of displacement of the angle of rotation of a servo motor (31) that moves a crosshead (13); a calculation unit (48) that successively calculates the change ratio (R) that is the ratio between amount of displacement in distance and the amount of displacement in angle of rotation; and a feedback control unit (49) that performs feedback control of the servo motor (31) on the basis of the change ratio (R). When the change ratio (R) exceeds a set value, the value of a parameter (K) that is used in feedback control is changed to a value for which the effect of feedback control is smaller.
Inventors:
KAWANO Toshiyuki (1 Nishinokyo Kuwabara-cho, Nakagyo-ku, Kyoto-sh, Kyoto 11, 〒6048511, JP)
Application Number:
JP2010/062313
Publication Date:
January 26, 2012
Filing Date:
July 22, 2010
Export Citation:
Assignee:
SHIMADZU CORPORATION (1 Nishinokyo Kuwabara-cho, Nakagyo-ku Kyoto-sh, Kyoto 11, 〒6048511, JP)
株式会社島津製作所 (〒11 京都府京都市中京区西ノ京桑原町１番地 Kyoto, 〒6048511, JP)
株式会社島津製作所 (〒11 京都府京都市中京区西ノ京桑原町１番地 Kyoto, 〒6048511, JP)
International Classes:
G01N3/08
Attorney, Agent or Firm:
OTSUBO Takashi (Otsubo Patent Office, 688-1 Higashikumi-cho, Fushimi-ku, Kyoto-sh, Kyoto 63, 〒6128063, JP)
Claims: