JPH11281550A - Material testing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a material testing machine which can form measured data of a plurality of specimens in graphs and overlap and display graph diagrams in a manner to be distinguishable from each other. SOLUTION: This testing machine has a graph display means 31 which forms measured data of specimens in graphs for each specimen and overlaps and displays the graph diagrams. This graph display means 31 has a plot attribute- setting means which distinguishes and displays the graph diagrams showing material characteristics of the specimens with making plot attributes mutually different. The machine also includes an offset-setting means 34 which applies an offset to a plot position of each graph diagram showing the material characteristic of the specimen.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material testing machine provided with a graph display means for displaying, as a graph, measurement data of, for example, a load and a displacement of a specimen to which a predetermined load is applied.

[0002]

2. Related Art As shown in FIG. 5, a material testing machine generally has a testing machine body 10 for applying a load such as a load and a displacement to a specimen, and an operation of the testing machine body 10. And a dynamometer 20 for detecting the load, displacement, and the like of the specimen to which a load is applied, and a control command to the dynamometer 20 and the load, displacement, and the like detected by the dynamometer 20. A data processing device 30 for obtaining the material properties of the specimen according to the measurement data.

[0003] Specifically, a tester main body 10 includes a test piece such as a metal material piece mounted on a pair of chucks (not shown).
The load device 11 such as a hydraulic cylinder is used to apply a compressive load or a tensile load, or a load composed of a compressive displacement or a tensile displacement. In addition, not only compression and tension but also load such as bending and distortion may be applied. Dynamometer 2
0 includes a control unit 21 for controlling the operation of the load device 11 and the like of the test machine main body 10 and the test machine main body 10
And a measuring unit 22 for measuring a load, a displacement, and the like applied to the specimen via a load cell (load cell) 12 and a displacement meter (extensometer) 13 incorporated in the apparatus.

On the other hand, the data processing device 30
For example, it is composed mainly of a personal computer,
It is configured such that measurement data including the load and displacement detected by the dynamometer 20 is taken in a predetermined cycle, and the data is processed. The data processing device 30 is required to determine material characteristics such as load / elongation characteristics, stress / strain characteristics, and strength of the specimen. The data processing device 30 also gives commands such as test conditions for the specimen and control conditions for the tester main body 10 to give the dynamometer 20 a command.
May be controlled.

[0005] In particular, the data processing device 30 uses the display (not shown) provided in the data processing device 30 to convert the measured data obtained as described above into graphs of load / elongation characteristics and stress / strain characteristics. There is provided a graph display function 31 for displaying the data in a converted form. Incidentally, the graph display by the graph display function 31 is performed by setting each variable parameter of the X-axis and the Y-axis under the graph display condition set as one item related to the test condition, as shown in FIG. Set the display scale of each axis,
The measurement is performed by plotting the measurement data on the XY plane (two-dimensional plane). For example, by plotting the displacement (elongation) amount given as the measurement data and the load value with the X axis being the displacement (elongation) and the Y axis being the load, by drawing a graph diagram specified by the measurement data Done.

[0006]

A material test of a specimen is generally carried out in lots as a unit of a plurality of specimens, and test conditions are set for each lot. The evaluation of the material properties is performed by comparing the measured data of the test specimens in the lot with each other, and further, by statistically processing the measured data. At this time, each measurement data of a plurality of specimens is graphed using the graph display function 31 described above, and the graphs are superimposed and displayed on the same screen, so that the comparison is performed.

More specifically, using a graph display screen as shown in FIG. 7, each measurement data of a plurality of (for example, two) test specimens is respectively plotted in a graph display area scaled as described above. The graph is superimposed and displayed, and their characteristics are compared and evaluated. However, the measurement data of the specimens belonging to the same lot often resemble each other, and the graphs themselves often overlap each other, so that it is difficult to distinguish the graphs from each other. In particular, when a large number of graphs are superimposed and displayed collectively, the above-mentioned problem appears remarkably.

The present invention has been made in view of such circumstances, and has as its object to graph measurement data of a plurality of specimens, and to superimpose and display the respective graphs so that they can be distinguished from each other. It is an object of the present invention to provide a material testing machine provided with a graph display means capable of performing the above-mentioned operations.

[0009]

In order to achieve the above-mentioned object, a material testing machine according to the present invention comprises a test condition setting means for setting a test condition for a specimen, and a test condition setting unit which executes the test condition under the test condition. Data collection means for collecting measurement data indicating the material properties of the specimen, and a graph display means for graphing and displaying the collected measurement data for each specimen, and in particular, the graph display means includes a plurality of It has the function of graphing the measurement data of the specimens and displaying the graphs at the same time, and differentiating the rendering attributes of the graphs showing the material properties of the specimens from each other. It is characterized by having an attribute setting means.

More specifically, as described in claim 2, the drawing attribute setting means makes the drawing colors or line types of the respective graph diagrams different from each other so that a plurality of graph diagrams displayed in a superimposed manner. Are distinguished from each other. In a preferred aspect of the present invention, as set forth in claim 3, the graph display means further includes an offset setting means for offsetting a drawing position of a graph showing the material characteristics of each specimen. It is characterized by. This offset is given, for example, as a fixed offset amount between a plurality of graph diagrams. Therefore, the plurality of graph diagrams are sequentially offset and drawn by a predetermined amount.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a material testing machine according to an embodiment of the present invention, particularly a graph display function 31 provided in a data processing device 30, will be described with reference to the drawings.
The material testing machine according to this embodiment basically includes a testing machine body 10 and a testing machine body 1 as described with reference to FIG.
0 to control the operation of the dynamometer 20 and the dynamometer 20
And various control commands, and collects measurement data including the load and displacement of the specimen measured via the dynamometer 20 and obtains the load / elongation characteristics and displays the graph, and furthermore, And a data processing device 30 for obtaining material characteristics such as elastic modulus.

Here, the feature of the material testing machine according to this embodiment is that, as shown in FIG. 1, a load is applied to the specimen under the test conditions set for the specimen. The point is that measurement data including, for example, load and displacement indicating the material characteristics is collected, and the measurement data is separately filed together with condition data indicating the test conditions as one file corresponding to the test specimen. . Therefore, even though the measurement data is obtained from a plurality of test specimens belonging to the same lot and executed under the same test condition, the condition data is added to each measurement data and each measurement data is filed.

With such a file structure, not only the measurement data of a plurality of specimens belonging to the same lot but also the measurement data of specimens belonging to another lot are displayed in one graph as described later. Graphing of each measurement data on the screen and superimposed display thereof are performed. In particular, the scale of the graph display for each measurement data is adjusted by referring to the condition data attached to the measurement data, so that the graph diagrams respectively indicated by a plurality of measurement data under the same display scale can be compared and evaluated with each other. Is superimposed on the display.

The graph display means (function) 31 provided in the data processing device 30 basically includes X-axis and Y-axis variable parameters according to a graph display condition described as a part of the condition data. Set the display scale (scale and unit). Then, the measurement data is sequentially plotted on a two-dimensional graph display screen (XY screen) specified under the display scale set as described above to draw a graph diagram indicated by the measurement data. Specifically, the displacement (elongation) is plotted on the X-axis with the displacement (elongation) given as the measurement data with the Y-axis as the load, and the load / displacement (elongation) characteristics are thereby plotted. To draw.

On the graph display screen,
When a file command is started as described later, and another file is specified by using a file addition command prepared especially for editing a plurality of measurement data, the measurement data and the condition data of the specified file are obtained. Is read in addition to the data already being edited. Then, the measurement data of the additionally specified file is graphed and superimposed and displayed on the graph display screen already displaying the graph diagram. At this time, the scale adjustment unit refers to the condition data (graph display condition) of each file, and performs a display scale adjustment process such as unifying the maximum display scale (scale adjustment unit 32). The addition of the measurement data by specifying the addition of the file and the superimposed display of the graph diagram by graphing the measurement data are sequentially performed up to the maximum number of files that can be processed on the graph display screen.

In this manner, each measurement data of a plurality of specimens is graphed, and these graphs are plotted as one graph.
When overlaying on two graph display screens,
A characteristic function of the graph display unit 31 according to this embodiment is to provide a drawing attribute setting unit 33 for distinguishing and displaying these graphs by making the drawing attributes of the graphs different from each other. On the point. The drawing attribute setting means 33 is a means for sequentially assigning to the file according to, for example, the reading order of the file while changing the drawing color or the line type as the attribute information of the graphing. Specifically, these pieces of attribute information are set in advance for each graph item corresponding to each of the graph diagrams that can be simultaneously displayed on the graph display screen, and to which graph item the file from which the measurement data is read is located , The attribute information is given to the file. The drawing colors are, for example, “red” and “green”.
The line types are given as, for example, "thick solid line", "thin solid line", "dashed line", "dash-dot line", and so on.

The graph display means 31 has a function of distinguishing and displaying a plurality of graph diagrams by making the rendering attributes different (drawing attribute setting means 33), and also includes a drawing position of the plurality of graph diagrams. Is provided with an offset setting means 34 for drawing each graph diagram by shifting it at a predetermined pitch. The offset setting means 34 gives, for example, a shift (offset) in the X-axis direction between a plurality of graphs, whereby offset data is given to the attribute information for graphing.
This offset data is stored in the offset setting means 34.
Is, for example, zero (0) for the measurement data of the first file, Δ for the measurement data of the second file, 2Δ for the measurement data of the third file,. The measurement data of the second file is given as (n-1) Δ.
As a result, a graph diagram obtained by graphing each measurement data is drawn with the drawing start point offset by the offset data.

Thus, according to the graph display means 31 having such functions (drawing attribute setting means 33 and offset setting means 34), each measurement data of a plurality of test specimens is graphed on one graph display screen. When superimposed and displayed, since the drawing attributes of the respective graph diagrams are different from each other, they are further appropriately offset and given a predetermined amount of displacement, so that these graph diagrams are clearly identified. It becomes possible. In particular, by making the drawing attributes different, in particular, by making them different for each graph item in advance, and by simply performing an offset process, a plurality of graphs can be clearly identified and displayed. The comparative evaluation of the indicated material properties can be facilitated.

More specifically, the graph display of the measurement data is performed using a data editing screen as shown in FIG. 2, for example. By specifying a file to be evaluated, the measurement data and the condition data are read from the specified file, and a list of test conditions is displayed in a test condition display area A of a data editing screen as shown in FIG. 2, for example. Are displayed for each item, and a graph diagram of the measurement data is displayed on the graph display screen B.

When a file processing command is designated on this data editing screen, a pull-down menu M relating to file processing is displayed. In this pull-down menu M, in addition to existing commands such as creation of a new file, a new command consisting of "add file" and "release file" is prepared. Another file can be added as needed. The additional command of the above file is
The measurement data of the newly read file is added to the measurement data already displayed in the graph, and a graph of each of these measurement data is superimposed on the same screen as shown in FIG. 3, for example. Display function.

That is, when a file addition command is specified, a plurality of graphs are displayed on the graph display screen B on the editing screen for a plurality of measurement data, as shown in FIG. A mode that allows simultaneous drawing is set for all files. On the side of the graph display screen B, a graph item screen C indicating a drawing attribute of a plurality of graph diagrams is displayed, and at a lower portion of the graph display screen B, corresponding to each of the above graph items. A file selection screen D for specifying which file of the measurement data is to be read is displayed in the graph item.
The "file release" command is used, for example, on a statistical result screen (not shown) for performing statistical processing on measurement data.

By selecting a file for each graph item on the file selection screen D, the measurement data of the designated file is read for each graph item and graphed on the graph display screen B. Is displayed. The display of the graph diagram is shown in the graph item screen C.
Is performed by changing the display color in accordance with the drawing attribute set in.

When a scale change processing command is designated on the data edit screen, a scale change child screen as shown in FIG. 4 is opened. Basically, condition items related to graph display obtained from the condition data described above are displayed on the child screen. By using such a child screen, the variable parameters of the X-axis and the Y-axis on the graph display screen B and the display scale thereof are changed. The setting items related to the graph display are given according to the variable parameters.

The child screen is provided with setting items relating to the offset of the graph display. By inputting an offset value in this item, an offset is sequentially given to each of the above-described graph diagrams, and each of these graph diagrams is displayed while shifting its drawing position by an offset Δ as illustrated in FIG. . As a result, even when the shapes of a plurality of graphs superimposed and displayed are similar to each other, the material properties indicated by each of the graphs are clearly identified and displayed, and the comparative evaluation thereof is performed. Is easily performed.

The reading of the measurement data of the test pieces of another lot will be briefly described. The editing processing of the measurement data between different lots (simultaneous graph display) is performed as described above. This is realized by adopting a file management structure in which data is filed together with condition data indicating the test conditions. Incidentally, conventionally, as described with reference to FIG. 6, since the measurement data of a plurality of specimens is managed separately from the condition data and for each lot, the measurement data of other lots can be simultaneously measured. It was difficult to read.

In this regard, according to the file management structure in which the measurement data and the condition data are paired for each specimen as described above, regardless of which file is specified, Since the graphing conditions can be obtained from the above condition data, it is easy to graph the above measurement data, and therefore, there is no restriction on lot units. In particular, even if the conditions for graphing measurement data differ between files, the display scale is adjusted by the above-described scale adjustment function 32, so that a plurality of measurement data are graphed under a certain display scale. Can be displayed, and the comparison process can be performed accurately.

Thus, according to the data processing device 30 configured as described above, in particular, the graph display means 31, the measurement data of a plurality of test specimens are graphed on the data editing screen, and the graphs are superimposed and displayed. At this time, under the control (management) of the drawing attribute setting means 33, the drawing attributes are made different for each of the above-mentioned graph diagrams, so that the identification between a plurality of graph diagrams superimposed and displayed on the graph display screen B is performed. Can be easily performed. In addition, by appropriately operating the offset setting means 34, an offset can be given to each of the plurality of graphs and their drawing positions can be sequentially shifted, so that there is a case where the shape of each of the graphs is irregular. However, there is an effect that the material characteristics can be easily grasped while each of these graph diagrams is clearly identified. Therefore, a great effect can be obtained in comparing the measurement data of a plurality of specimens with each other to evaluate the material properties.

The present invention is not limited to the above embodiment. For example, it is also possible to change the line type from one to another by changing the drawing color. In this way, even when the graph display screen is printed out using a single-color printer, identification of each graph diagram becomes easy. The number of graphs and the like to be simultaneously displayed on one editing screen may be determined in accordance with the specifications of the data processing device 30 or the like. Of course, the offset amount can be appropriately changed and set according to the measured material characteristics and the like. At this time, if the offset amount is set to zero (0), a plurality of graph diagrams are superimposed and displayed on the same graph display scale. In addition, the present invention can be variously modified and implemented without departing from the gist thereof.

[0029]

As described above, according to the present invention, measurement data obtained from a plurality of specimens are respectively graphed, and when the graphs are superimposed and displayed on the same screen, each graph is drawn. Since the attributes are different, each graph diagram (material properties) can be used, for example, based on differences in display colors and line types.
Can be evaluated while each is clearly identified. Moreover, a plurality of graphs can be effectively identified and displayed only by simple display control.

Further, since a plurality of graphs are displayed with an offset given, even if the change characteristics of the respective graphs are similar,
Since each of these diagrams can be accurately grasped, a great effect such as greatly contributing to the evaluation of material properties can be obtained.

[Brief description of the drawings]

FIG. 1 is a view showing a concept of a graph display process in a material testing machine according to an embodiment of the present invention, together with a file management structure.

FIG. 2 is a view showing an example of a data editing screen for displaying a graph used in the material testing machine according to one embodiment of the present invention.

FIG. 3 is a diagram showing a configuration example of an editing screen for a plurality of measurement data for displaying a graph used in a material testing machine according to an embodiment of the present invention.

FIG. 4 is a view showing an example of an editor screen for changing a scale used in the material testing machine according to one embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a material testing machine.

FIG. 6 is a diagram showing the concept of a conventional graph display process together with a file management structure.

FIG. 7 is a diagram showing a configuration example of an editing screen for displaying a graph in a conventional material testing machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Test machine main body 20 Dynamometer 30 Data processing device 31 Graph display means 32 Scale adjustment means 33 Drawing attribute setting means 34 Offset setting means

Claims (3)

[Claims] 1. A test condition setting means for setting test conditions for individual test pieces, a data collecting means for collecting measurement data indicating material properties of the test pieces executed under the test conditions, and Graph display means for displaying measurement data in a graph for each of the test specimens, and the graph display means has a function of graphing measurement data of a plurality of test specimens and simultaneously superimposing and displaying the data. And a drawing attribute setting means for distinguishing and displaying the respective graphs by making the drawing attributes of the graphs indicating the material characteristics of the respective specimens different from each other. 2. The material testing machine according to claim 1, wherein said drawing attribute setting means makes a drawing color or a line type of each graph diagram different from each other. 3. The material testing machine according to claim 1, wherein the graph display means includes an offset setting means for giving an offset to a drawing position of a graph showing the material characteristics of each specimen. .