The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 16, 2015
Filed:
Jul. 26, 2012
Akihiko Kandori, Tokyo, JP;
Kuniomi Ogata, Tokorozawa, JP;
Ryuzo Kawabata, Higashiyamato, JP;
Yuko Sano, Kokubunji, JP;
Takako Mizoguchi, Sayama, JP;
Akihiko Kandori, Tokyo, JP;
Kuniomi Ogata, Tokorozawa, JP;
Ryuzo Kawabata, Higashiyamato, JP;
Yuko Sano, Kokubunji, JP;
Takako Mizoguchi, Sayama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
For measuring hardness of an object, a measurement apparatus is pushed against the object and a degree of hardness calculation system calculates hardness based on information from the measurement apparatus. The measurement apparatus includes an acceleration sensor which outputs first information of acceleration of a contact area of the measurement apparatus, and a second sensor, such as a magnetic sensor or a pressure sensor, which outputs second information based on pressure applied to the contact area. The degree of hardness calculation system generates a second-derivative waveform by twice differentiating a waveform based on the output of the second sensor, compares the second-derivative waveform and the information of acceleration from the acceleration sensor, and calculates hardness of the object based on the comparison result.