JPH0534215A - Automatic measuring method using manual universal tester - Google Patents

Abstract

PURPOSE:To automate the tests by using a manual universal tester, displaying the behaviors at the test and to print out the table of the test results and related diagrams. CONSTITUTION:Measurement is started with a computer based on a load which is compressed with a universal tester 3. The measured data from a measuring instrument are sampled in correspondence with the specified load. The specified operation is performed based on the sampled data. Various numerical values and related diagrams are displayed on a display device 9 based on the operated information and stored in a memory device 10. When the ratio of the load, which is compressed with the tester 3, with respect to the maximum load stored in the memory device 10 is decreased, the measurement of one body under test 2 is finished. A series of processings are repeated until the measurements of the specified number of the bodies under test 2 are finished. Thereafter, the table of the test results and the related diagrams are outputted with a printer 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention, when testing a test body,
The operator only operates the manual universal testing machine, the measurement is automatically started, the processing such as calculation, data storage, and drawing is repeated, and the measurement is automatically terminated depending on the load condition. The present invention relates to an automatic measurement method using.

[0002]

2. Description of the Related Art In a manual universal testing machine, in order to obtain stress / strain characteristics and load / displacement characteristics of a test piece, a compression test is performed on a test piece such as concrete or rock, and a tensile test is performed on a test piece such as a steel material. The test is conducted. Also, in the past,
When performing a material test using a manual universal testing machine,
The tester operator and the measurement device operator are set to perform a group of two, and multiple points (2 to 5 points) per test piece
Each time, the operator of the tester sends a signal to the operator of the measuring instrument at each load step while applying force, and the operator actuates the measuring instrument each time in response to this signal and records the measured value of the measuring instrument. It was designed to be printed on paper or to read the measured values and record them in a data table. Furthermore, even when a personal computer is used, the output of the converter is taken in by the personal computer via the measuring instrument, but in this case as well, it is necessary for two persons to perform a set, and each load step from the tester operator In response to the signal, the operator of the personal computer operated the keys to fetch the data, print out, store the data, and so on. Further, in order to record, the output of the converter is directly plotted by a XY recorder through a dynamic strain amplifier or the like.

[0003]

As described above, in the conventional material testing method using the manual universal testing machine, there is a disadvantage that one set of two people is required for testing. Moreover, since the data reduction has to be performed off-line, there is a disadvantage that a great deal of time and labor is required for the data reduction after the test as well as during the test. In particular, when recorded on a recording paper or a data table, it is necessary to calculate each value and plot each relationship, and depending on the number of tests, a huge amount of time and labor is required to organize the data.
Furthermore, even when data is downloaded to a PC for processing,
Since the measurement is performed for each load step, for example, it is difficult to follow up with large deformation during plastic deformation and to capture the peak thereof, which makes it difficult to grasp the details of the test body.

Further, when recording data, the behavior of the test body is displayed at the same time as the test, so it can be said that this is a practical measurement method, but it is difficult to display related to all the measurement points, and the values of each measurement point are displayed. It is necessary to read them from above and relate them, and there is a problem that personal factors are mixed in to organize the data, which may reduce the measurement accuracy. Furthermore, in the conventional measurement method, the reproducibility of the result is poor, and in order to compensate for this, heavy equipment such as a data recorder is required, and in the test, adjustment of the amplifier etc. in anticipation of the phenomenon to occur is required. It is necessary, and the conventional measurement method is limited to a simple measurement method. Therefore, the present invention makes it possible to automatically measure at the time of the test and at the same time display the behavior of the test body, and at the end of the test, prints out a table of test results according to the number of test bodies, and a relational diagram for material test. At the same time, the purpose is to solve the above problems by enabling data organization.

[0005]

According to an automatic measuring method of the present invention, a sensor is attached to a test body set in a manual type universal testing machine, and the sensor output is taken into a computer via a measuring machine to obtain a test body. Is a measurement method using a manual universal testing machine for measuring the characteristics of the above, wherein the computer starts measurement based on a load pressurized by the universal testing machine, and the measurement is performed in response to a predetermined load. The measurement data from the instrument is sampled, a predetermined calculation is performed based on this sampled data, various numerical values and related charts are displayed on the display device based on this calculation information and stored in the storage device, and the pressure is applied by the tester. When the ratio of the load to the maximum load stored in the storage device decreases, the measurement of one test body is terminated, and the series of processes is repeated until a predetermined number of test bodies are finished. And and outputs a relationship diagram by the printer.

[0006]

Therefore, since one test body and a predetermined number of test bodies are automatically measured, one tester can perform the test. Further, since the sequential test status is displayed on the display device during the test, the test can be performed while directly confirming the behavior of the test body. At the end of the test, a table of test results and a relational diagram are printed out, which eliminates the need for data organization and significantly reduces the time and effort required for data organization. Test accuracy improves without entering. Moreover, since the measurement of each test piece is completed based on the rate of decrease of the current load with respect to the maximum load, explosion of the test piece can be avoided and damage to the tester can be prevented.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a block configuration of an automatic measuring device for carrying out the method of the present invention. The automatic measuring device 1 of the present embodiment is
A manual universal testing machine 3 on which the test body 2 is set, and a displacement gauge (sensor) 4 such as a strain gauge attached to the test body 2
A load converter 5 built in the tester 3 for detecting a load applied by the tester 3;
And a personal computer (computer) 8 that performs processing such as automatic measurement, data collection, calculation, and drawing according to the output signal from the measuring instrument 6 and the condition setting from the keyboard 7, and is also connected to the personal computer 8 for various numerical values and relational diagrams. CRT (display device) 9 for displaying, a diskette (storage device) 10 for storing data, a printer 11 for printing out charts and the like. The measuring instrument 6 can exchange data with the personal computer 8 by GPIB.
It is configured to be set by the personal computer 8 based on a program according to the test conditions.

Next, a case where automatic measurement is performed by the automatic measuring device 1 having the above-mentioned configuration will be described with reference to FIG. First, a tester operates the personal computer 8 to run a test program, operates a measurement system including the tester 3, and sets an initial value of the tester 3 (step S1). Next, after inputting test conditions and the like to the personal computer 8 (step S2), the test body 2 to which the displacement meter 4 is attached is set in the testing machine 3 (step S3), and the initial value of the displacement meter 4 is set (step S3). S
4). Then, in this state, when the test machine 3 is manually operated to apply a force as in the conventional case, the measurement routine is automatically started. That is, as shown in FIG. 2, when the tester 3 starts applying force (step S5) and the applying force reaches a preset designated load (step S6), a measurement routine for all measurement points is started. Yes (step S7).

In this measurement routine, a trigger acts as the load of the tester 3 increases, a measurement value corresponding to the load is measured (step S8), and the measurement value is calculated (step S9), for example, stress / strain. The relationship plotting and various numerical values are displayed on the CRT 9 (step S10), and are stored in the diskette 10 (step S11).
Although these processings vary depending on the number of measurement points, they are sequentially performed in about a second or less until the load starts to decrease in step S12. Therefore, the tester performs the test so that the applied speed is kept constant. All that is required is to operate the machine 3. Therefore, it is possible to automatically measure by the personal computer only by operating the tester, and it is not necessary to have a person to measure, and it is possible for one tester to perform the measurement, and the measurement status can be plotted and various values on the CRT. Since they are sequentially displayed, the tester can be operated based on these information, and the measurement can be performed easily and accurately.

Further, when the load to be weighted starts to drop in step S12, the measurement of one test body ends in step S13. In this case, the measurement is completed based on the rate of decrease of the current load with respect to the maximum load that is always stored during the test, and it can be determined that the end of the test has been reached and that the test body will not explode. To be prevented. Also, since these information are displayed on the CRT,
It is possible to perform a test while grasping the behavior of the test body, and it is possible to safely operate the test machine. Next, in step S14, it is determined whether the input number of test bodies has been completed (one set of tests), and the steps S3 to S14 are repeated until the predetermined number of test pieces are completed, and the predetermined number of test pieces are processed. If so, in step S15, the arranged test results are printed out by the printer 11 as various numerical values and relationship charts as shown in FIG. 3 (step S15), and the whole process is completed.

The diagram of FIG. 3 shows the stress / strain characteristics during the compression test. In this way, the related charts are printed out at the same time as the end of the test, so it does not take a huge amount of time and effort to organize data as before, and it is significantly improved in terms of both time and effort, and even when organizing data. Highly accurate measurement is possible without personal factors.

[0012]

As described above, according to the present invention, one test body and a predetermined number of test bodies are automatically measured by the microcomputer, so that one tester can perform a test. .. Further, since the status of the sequential test is displayed on the display device during the test, it is possible to perform the test while directly confirming the test behavior of each test body, which facilitates the test. Furthermore, as the test results are organized and the tables and related diagrams are printed out from the printer at the same time as the test is completed, the data organization becomes unnecessary, and the time and labor required for data organization are significantly improved. The test accuracy is improved without the entry of personal factors. Furthermore, since the measurement of each test piece is completed based on the rate of decrease of the current load with respect to the maximum load, explosion of the test piece can be avoided and damage to the tester can be prevented.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of an automatic measuring device.

FIG. 2 is a flowchart showing an example of an automatic measurement method.

FIG. 3 is a diagram showing an example of test data in a compression test.

[Explanation of symbols]

 2 Test piece 3 Universal testing machine 4 Sensor 6 Measuring instrument 8 Computer 9 Display device 10 Storage device 11 Printer

Claims (1)

Claim: What is claimed is: 1. A manual type in which a sensor is attached to a test body set in a manual universal testing machine, and the sensor output is taken into a computer through a measuring instrument to measure the characteristics of the test body. In the measuring method using a universal testing machine, by the computer, start measurement based on the load pressurized by the universal testing machine, corresponding to a predetermined load, collecting the measurement data from the measuring device, A predetermined calculation is performed based on this sampling data, various numerical values and a related chart are displayed on the display device based on this calculation information, and are also stored in the storage device, and are stored in the storage device of the load applied by the tester. When the ratio to the maximum load decreases, the measurement of one test piece is finished, and the series of processes is repeated until a predetermined number of test pieces are finished, and then a table of test results and a relationship diagram are printed. Automatic Measurement method using a manual universal testing machine, characterized in that the further output.