INDENTING TYPE MATERIAL TESTING MACHINE, TESTING METHOD, AND TESTING PROGRAM PRODUCT
First Claim
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1. An indenting type material testing machine comprising:
- an indenter pressed onto a test piece;
a load device that applies a load to the test piece through the indenter;
a displacement sensor that measures displacement of the indenter;
a calculation device that calculates filter characteristics that remove a turbulence component in a displacement detection signal based on the displacement detection signal obtained from the displacement sensor in a no-load state;
a storage unit that stores the filter characteristics calculated by the calculation device; and
a filtering device that performs filtering to the displacement detection signal based on the filter characteristics stored in the storage device.
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Abstract
An indenter is pressed onto a test piece; a displacement of the indenter is detected; and a testing force applied to the test piece through the indenter is detected. FFT analysis is performed on a displacement detection signal detected in a non-load state to detect a frequency band of noise. Filter characteristics are calculated based on the detected frequency band, and filtering is performed on the displacement detection signal based on the filter characteristics. Physical properties of the test piece are evaluated based upon the displacement detection signal after the filtering and the testing force.
6 Citations
10 Claims
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1. An indenting type material testing machine comprising:
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an indenter pressed onto a test piece; a load device that applies a load to the test piece through the indenter; a displacement sensor that measures displacement of the indenter; a calculation device that calculates filter characteristics that remove a turbulence component in a displacement detection signal based on the displacement detection signal obtained from the displacement sensor in a no-load state; a storage unit that stores the filter characteristics calculated by the calculation device; and a filtering device that performs filtering to the displacement detection signal based on the filter characteristics stored in the storage device. - View Dependent Claims (2, 5)
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3. An indenting type material testing machine comprising:
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an indenter pressed onto a test piece; a load device that applies a load to the test piece through the indenter; a displacement sensor that measures displacement of the indenter; a calculation device that calculates filter characteristics that remove a turbulence component in a displacement detection signal based on the displacement detection signal obtained from the displacement sensor in a loaded state; a storage unit that stores the filter characteristics calculated by the calculation device; and a filtering device that performs filtering to the displacement detection signal based on the filter characteristics stored in the storage device. - View Dependent Claims (4)
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6. A testing method comprising:
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pressing an indenter onto a test piece; detecting displacement of the indenter; detecting a testing force applied to the test piece by the indenter; detecting a frequency band of noise in the detected displacement detection signal of the indenter; calculating filter characteristics based on the detected frequency band; filtering the displacement detection signal based on the calculated filter characteristics; and evaluating physical properties of the test piece based on the displacement detection signal after the filtering and the testing force. - View Dependent Claims (7, 8)
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9. A program product for testing causing a computer to execute:
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a process to press an indenter onto a test piece; a process to detect displacement of the indenter; a process to detect a testing force applied to the test piece by the indenter; a process to detect frequency band of a noise to a detected displacement detection signal of the indenter; a process to calculate filter characteristics based on the detected frequency band; a process to perform filtering to the displacement detected signal with the calculated filter characteristics; and a process to evaluate physical properties of the test piece based on the displacement detection signal after the filtering and the testing force.
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10. A material testing machine comprising:
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a measurement device that measures frequency characteristics of a turbulence noise superimposed on a detection signal; an arithmetic device that analyses the frequency characteristics to determine a filter constant; a filtering device that performs filtering defined by the filter constant; and an evaluation device that evaluates a material by using the detection signal subjected to the filtering by the filtering device.
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Specification