JPS61275640A - Testing machine for computer control material - Google Patents

Abstract

PURPOSE:To eliminate the need to operate a testing machine actually even when a program is modified by providing an equivalent circuit which has the same transfer function with a testing machine system and connecting the equivalent circuit to a computer through a changeover switch. CONSTITUTION:When whether the program has a bug or not and the operation characteristics of the testing machine are checked in the modification of the program, the changeover switch 7 is switched to the equivalent circuit and the computer 1 is put in operation to observe a monitor 9. When it is evident on the display of the monitor 90 that the computer does not operate according to the contents of the program, it is checked whether the program has a bug or not. The program is corrected and executed again by the computer 1, and the current operation characteristics are recorded. Thus, the checks are made and the changeover switch 7 is switched to a hydraulic operation type testing machine 3 and a test-piece 4 is set and tested actually according to the modified program. Data obtained at this time are compared with said operation characteristics to discriminate an error base, thereby investigating the data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a combinator control material testing machine equipped with a simulation function.

[Conventional technology]

In a computer-controlled material testing machine, the load waveform, strain waveform, etc. can be changed by changing the program. When changing this program, it is necessary to check whether there are any bugs (errors) in the changed program.

In addition, with computer-controlled material testing machines, the operating characteristics of the testing machine are recorded in advance as data, and these operating characteristics are added to the material test data as a correction term to prevent the operating characteristics from being included as errors in the material test data. However, if the program is changed, the reliability of the obtained data will become a problem unless the operating characteristics of the test machine based on the changed program are checked. That is, the data may not represent the material properties due to errors in the testing machine itself.

For this reason, conventionally, when changing a program, it was necessary to actually run the test machine to check for program bugs and check the operating characteristics of the test machine before testing, which was time-consuming and, in some cases, There were problems such as danger.

[Problem that the invention seeks to solve]

The present invention has been made in view of the above circumstances, and its purpose is to provide a computer-controlled material testing machine that does not require actually operating the testing machine when changing a program.

[Means for solving problems]

In order to achieve the above object, the present invention provides a computer-controlled material testing machine that controls the testing machine according to the contents of a computer program to perform a material test. The present invention is characterized in that the equivalent circuit and the testing machine are connected to the computer via a changeover switch.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings.

The drawing shows an example of a computer-controlled material testing machine of the invention. In FIG. 1, reference numeral 1 is a computer, 2
3 is a hydraulically operated testing machine, 4 is a test piece, and 5 is an equal wound path.

The signal from the computer 1 is inputted to the hydraulically operated testing machine 3 via the D/A converter 6 and the changeover switch 7, and the signal from the hydraulically operated testing machine 3 is inputted to the computer 1 via the A/D converter 8. is input.

The equal wound path 5 is constituted by an electric circuit having a transfer function equivalent to that of the testing machine system 2, and is connected to the computer 1 via a changeover switch 7.

Since the hydraulically operated testing machine 3 is used as the testing machine, a first-order lag is used as the transfer function. In addition,
As shown in FIG. 2, an equal wound path 5a with a first-order delayed transfer function and an equal wound path 5 with a second-order delayed transfer function
b and an equal wound path 5c having a third-order delayed transfer function may be provided, and these may be switched.

A monitor 9 consisting of a display device or the like is connected to one common terminal of the changeover switch 7, so that outputs from the hydraulically operated testing machine 3 and the wound passageway 5 can be observed.

Next, the operation of the above embodiment will be explained.

During normal operation, the selector switch 7 is switched to the hydraulically operated testing machine 3 side, and the control signal is sent from the computer 1 to the D/D/
A signal is sent to the hydraulically operated testing machine 3 via the A converter 6 and the changeover switch 7, while a signal from the hydraulically operated testing machine 3 is sent to the computer 1 via the changeover switch 7 and the A/D converter 8.
send to At this time, the test data can be observed on the monitor 9 in real time.

To check the existence of program bugs and the operating characteristics of the testing machine when changing the program, switch 7 is switched to the open side, operate computer 1, and observe monitor 9. If it is found from the display on the monitor 9 that the program does not operate according to its contents, the program is checked to see if there are any bugs. Then, the program is modified, the computer 1 is operated again, and the operating characteristics at that time are recorded.

After checking in this manner, the selector switch 7 is switched to the hydraulically operated testing machine 3 side, the test piece 4 is inserted, and an actual test is performed according to the changed program. Then, the data obtained at this time is compared with the above-mentioned driving characteristics. Thereby, it is possible to determine whether the error included in the data is due to an error in the hydraulically operated testing machine 3 itself or to the reliability of the hydraulically operated testing machine 3. In other words, it is possible to determine the error base and examine the data.

〔Effect of the invention〕

As explained above, according to the present invention, an equal wound path having the same transfer function as the testing machine system is provided, and the equivalent circuit is connected to the computer using a changeover switch.
There is no need to actually operate the test machine when changing the program, operations such as checking for bugs in the program become easier, and there is no danger associated with actually operating the test machine. Additionally, the operating characteristics can be checked in advance, and reliable data can be obtained even if the program is changed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a first embodiment of the invention, and FIG. 2 is a block diagram showing a second embodiment of the invention. DESCRIPTION OF SYMBOLS 1...Computer, 2...Testing machine system, 3...Hydraulic operation type testing machine, 5, 5a, 5b, 5C...Wound path, etc., 7...Switching switch.

Claims (1)

[Claims] In a computer-controlled material testing machine that performs material tests by controlling the testing machine according to the contents of a computer program, an equivalent circuit having a transfer function equivalent to that of the testing machine system is provided, and the equivalent circuit and the testing machine are connected. A computer-controlled materials testing machine, characterized in that it is configured to be connected to the computer via a changeover switch.