Mitutoyo Corporation

Akashi Corporation

Masaharu Tsujii

Fumihiko Koshimizu

Satoko Mori

Eiji Furuta

Ryouji Nakamura

Satoko Nomaguchi

Ryotaro Fukuchi

Takayuki Yamada

A hardness tester includes a measurer (CPU) measuring a value for a material characteristic of a sample in conjunction with formation of an indentation, an acquirer (CPU) acquiring measurement data associated with the value for the material characteristic of the sample measured by the measurer, and a determiner (CPU) accumulating a predetermined value for the material characteristic based on the measurement data acquired by the acquirer and determining a time to replace the indenter based on the accumulated value for the material characteristic.

Hardness tester and hardness testing method

A coordinate measuring system includes a probe provided with first to ninth infrared LEDs, and an image capture apparatus and calculation controller detecting the position of the probe. The probe includes a distance obtainer acquiring distance data for a distance from the probe to the image capture apparatus; and an illumination controller controlling an illumination time of the first to ninth infrared LEDs based on the distance represented by the distance data.

Coordinate measuring system, coordinate measuring method, and probe

A hardness tester has a test force applier generating a test force using an electromagnetic force generated by supplying a current to a drive coil provided in a magnetic field and applies the test force to an indenter to press the indenter into a surface of a sample; a temperature detector detecting a temperature of the test force applier; and a test force corrector correcting the test force generated from the test force applier based on the temperature detected by the temperature detector.

Hardness tester

A hardness testing apparatus has an indenter shaft having an indenter at a top thereof, a force motor for moving the indenter shaft in its axial direction and applying a predetermined test force to a sample through the indenter, an external force detection section for detecting an external force applied from outside of the hardness testing apparatus to the indenter shaft when the indenter shaft is moved by the force motor, and an external force adjustment and control section for controlling the force motor to apply the predetermined test force to the sample while deadening the external force detected by the external force detection section.

Hardness testing apparatus

A method for calibrating an apparatus for calibrating a hardness tester, the method comprising the steps of: setting a plurality of calibration points between a rated force point at which a rated force of a force measuring member is applied and a zero point at which no-load is applied, for measuring outputs (mV/V) from the force measuring member according to test forces(N) applied to the force measuring member; and calculating a relation between the test forces(N) and the outputs(mV/V) as an approximation based on the test forces(N) and the outputs(mV/V) according to the test forces(N) at the calibration points. An apparatus for evaluating a dynamic characteristic of a specimen, which installed in a hardness tester, the apparatus comprising: a force measuring member; a force transmitting portion which is movable up and down; a distance measuring member incorporated in the force transmitting portion to be contacted with the force measuring member from above; and an indenter.

Growing community of inventors

Kanagawa, Japan

Masaharu Tsujii