公开(公告)号：US20190234793A1

公开(公告)日：2019-08-01

申请号：US16262952

申请日：2019-01-31

Applicant: SHIMADZU CORPORATION

Inventor： Tohru MATSUURA

IPC: G01H1/16 ,  G01M1/14 ,  G01H1/14

Abstract: A test result evaluating method and a material tester are provided. A test result evaluating part includes a representative value calculating part that acquires a representative value of section data corresponding to one period of a natural vibration frequency from data of a time period representing a force applied to a test piece also including a natural vibration and a ratio calculating part that calculates a ratio between the representative value acquired by the representative value calculating part and a value based on an amplitude of the natural vibration. The representative value calculating part and the ratio calculating part are arranged in a test result evaluating part as programs realizing functions by operating an arithmetic operation device.

公开(公告)号：US20230081934A1

公开(公告)日：2023-03-16

申请号：US17881594

申请日：2022-08-04

Applicant: Shimadzu Corporation

Inventor： Daisuke HAGIHARA ,  Taiki NISHIMURA ,  Tohru MATSUURA ,  Shota MAKI

IPC: G01N21/88 ,  H04N7/18 ,  G06F11/22

Abstract: This management device for a material testing machine includes: an acquisition unit that acquires at least either a captured image of a material testing machine body or a captured image of a control device that causes the material testing machine body to execute a test; and a data-processing unit that associates the captured image with the material testing machine and stores a result in an image storage unit.

公开(公告)号：US20220057308A1

公开(公告)日：2022-02-24

申请号：US17414945

申请日：2019-06-25

Applicant: SHIMADZU CORPORATION

Inventor： Tohru MATSUURA

IPC: G01N3/06 ,  G01N3/08

Abstract: In a case where control input is performed via a low-pass filter, a control gain more appropriate for both stability and responsiveness is set according to setting of the low-pass filter. A control unit (21) performs control input for a load mechanism (40) via a low-pass filter, discriminates a stability of a control system including the load mechanism (40) and the low-pass filter when setting of the low-pass filter is changed, sets an appropriate control gain based on a maximum control gain at which an excess amount of a measured value with respect to a target value is equal to or less than a predetermined value within a range where that the control system is stable, and controls an operation of the load mechanism (40) by using the appropriate control gain.

公开(公告)号：US20220034775A1

公开(公告)日：2022-02-03

申请号：US17297455

申请日：2019-06-10

Applicant: SHIMADZU CORPORATION

Inventor： Tohru MATSUURA

IPC: G01N3/08 ,  G05B5/01 ,  G01N3/30 ,  G05B13/02

Abstract: Provided is a material testing machine (1) including: a load mechanism (12) that applies a load to a test object; a load measurement device that measures the load applied to the test object; and a control device (30) that performs a feedback control for the load mechanism (12) based on a deviation between a measurement value of the load and a target value of the load, in which a change in a physical quantity generated in the test object due to the load is measured, and the control device (30) includes a hunting detection unit (66) that detects hunting by comparing a frequency spectrum obtained by converting time-series data of the measurement value with a frequency spectrum obtained by converting the time-series data of the target value.

公开(公告)号：US20190187195A1

公开(公告)日：2019-06-20

申请号：US16172892

申请日：2018-10-29

Applicant: SHIMADZU CORPORATION

Inventor： Tohru MATSUURA

IPC: G01R23/167 ,  G01R23/175 ,  G01R23/177

CPC classification number: G01R23/167 ,  G01N3/30 ,  G01N3/32 ,  G01N2203/0218 ,  G01R23/175 ,  G01R23/177

Abstract: A signal processing method and a material testing machine are provided. A reference function processing part includes a data interval generation part for cutting out input signal from a load cell into time-domain data interval by cutting out the input signal of a predetermined time length, a reference function determining part for determining a reference function to be used in a transform process, and a transform part for transforming the interval data using the reference function. Considering the approximately straight lines near the two ends of the data interval, the reference function is a third degree polynomial function with tangents overlapping with the approximately straight line at both ends of the data interval.

公开(公告)号：US20190086307A1

公开(公告)日：2019-03-21

申请号：US16005902

申请日：2018-06-12

Applicant: Shimadzu Corporation

Inventor： Tohru MATSUURA

IPC: G01N3/04 ,  G01M7/02 ,  G01N29/22

Abstract: A pair of jigs has the same mass and a weight is adjusted in consideration of a test piece shape so that stress of a center portion of a test piece becomes a desired value. That is, the jig serves as a weight adjustment tool for adjusting a resonance frequency and stress of the test piece. The upper and lower jigs are attached to both ends of the test piece S so that the center of gravity of the upper jig and the center of gravity of the lower jig are located on a perpendicular line passing through the center portion of the test piece.