JPS62167410A - Recording of measured value - Google Patents

Abstract

PURPOSE:To remove the necessity of a human operation and accurately record a load by storing measuring and testing modes in advance and storing a signal processing procedure. CONSTITUTION:The load signals from the load cell 1 of a material testing instrument are converted to sampling values LN via a load amplifier 2 and an A/D converter 3 to be inputted to a CPU 4. Signals LR arithmetically processed in the CPU 4 are outputted to a recorder 7 and the load-elongation curve in a test is recorded by the recorder 7. The procedure of the arithmetic processing of the sampling value LN is registered in the CPU 4 in advance for every three types of modes of tension test, compression test and tension and compression oscillatory test. The test mode is indicated by test mode indicating means 6 and, in accordance therewith, the arithmetic processing is conducted. On the basis of the resulted output values LR, the recorder 7 records measured values in the tests. Thus, the tests are coped with in the stages of processing measured signals, the constitution of a system itself is unnecessary to be adjusted, the system has a versatility and can properly and accurately record the measured values.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention can be used to record data obtained when conducting material tests in various test modes such as tension, pressure, tension, and tension/compression vibration. Regarding the recording method used.

[Prior Art] When recording a load in a material test, when a load cell is used in a compression test, the polarity of its output is opposite to that in a tension test. Therefore, as shown in Fig. 3, the load cell cable connecting the load cell 1 and load amplifier 2 was replaced with a compression cable 9, which was connected in the opposite way to the tension cable 8. I was trying to get a load record.

In addition, when performing both tension and compression imaging tests in which the load cell 1 is used to define tension and compression, make adjustments to move the zero position of the recorder to the center of the recording claw 10 as shown in Figure 4. At the same time, a calibration adjustment was made to halve the full scale output of the load amplifier 2 to obtain a load record.

[Problems to be Solved by the Invention] As mentioned above, when performing material tests using various load patterns and recording the obtained data, the load cell cable must be replaced for each test, the recorder, and the load amplifier. It is troublesome for the operator to adjust the parameters, and the work efficiency is poor, and the accuracy of load recording deteriorates due to human error.

Accordingly, an object of the present invention is to provide a load recording method capable of obtaining highly accurate load records without requiring the conventionally required human operations for each of these test modes.

[Means for Solving the Problems] In order to solve the above problems, the present invention employs the following configuration.

That is, the measured value recording method according to the present invention detects the amount of change in the measurement target item in measurement/test with a detection device,
In this method, the detection signal is processed by the processing unit and the obtained measurement value is recorded on the recorder.The processing unit must be programmed to record the test mode of the measurement/test in advance, and the test mode for each mode must be recorded. The arithmetic processing procedure for the detection signal from the detection device is also memorized for each test, and when performing measurements and tests, the arithmetic processing device determines the test mode, performs signal processing according to each mode, and records the values. It is characterized by being recorded by a meter.

[Function] Pre-memorize test modes for measurement and testing in the arithmetic processing unit, and store signal processing procedures for each mode that eliminate the need for replacing connection cables or amplifying detected signals. This makes it possible to record appropriate measured values for each mode without the manual operations that were conventionally required.

[Example] Hereinafter, an example will be used in which the present invention was carried out for one direct recording of measurements when each of these tests was selectively performed, with three types of material tests: a tensile test, a compression test, and a tension/compression dual imaging test. The present invention will now be explained.

FIG. 1 is a block diagram showing an example of a recording device used in carrying out the present invention, in which a load signal from a load cell 1 of a material testing machine (not shown) is amplified by a load amplifier 2, and an A/D
It is input to the converter 3.

Here, the sampling value of the A/D converted load is
Signal LR input to PU4 and processed by CPU4
is output to the recorder 7, and the recorder 7 records the load and
The elongation curve is recorded.

The CPU 4 is provided with a test mode instruction means (
The type of test is instructed from the instruction key (6) provided on the main body of the test hall. In addition, the CPU 4 has registered in advance the procedure for calculating the load value L\ for each of the three test modes: tensile test, compression test, and tension/compression image (dragon test). The test mode is determined and arithmetic processing is performed. Such arithmetic processing is performed according to the flowchart shown in FIG. If it is determined that it is a compression test, the output characteristics from load cell 1 will be reversed, so -LN is output as LR.If it is determined that it is a tension/compression test, the recorder head will be at zero point when LN=0,
When LN=xspn (Xspn is the full scale value of the recorder), it is at the full scale point, so (LN×5l
Perform the calculation Dn>/'2, set the zero point to the center of recorder 7 (LN+X5pn), and set the value of /2 to L.
Output as R. During the tensile test, change LN to LR as is.
Output as . The recorder 7 records the measured value during the test based on this output faLR.

By processing in this way, it is possible to record measured values such as load and elongation during a test without having to adjust the component equipment that was required for each test mode in the system configuration of a conventional material testing machine.

In other words, the recording method of the present invention takes measures according to each test at the measurement signal processing stage, so there is no need to adjust the system configuration itself, and it is versatile and allows measurement values to be recorded appropriately and accurately. Can be recorded.

Furthermore, in the case of obtaining a record of the load/elongation in a tension/compression swing test using an extensometer, the same processing as described above can be performed on the elongation recording axis as well. This invention can be implemented not only for material testing but also for recording measurements and tests using analyzers and other devices.

[Effects of the Invention] As is clear from the above description, the method for recording measured values in measurements and tests according to the present invention eliminates the need for exchanging instruments and adjusting equipment according to various modes, and eliminates human error. It is now possible to record measured values with high precision.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an example of the configuration of an apparatus used to carry out the present invention, Fig. 2 is a flowchart showing the procedure for calculating a load signal in the embodiment, and Figs. 3 and 4 are conventional recorders. It is a figure explaining a method. 1...Load cell 2...Load amplifier 4...C
PU 6...Test mode instruction means 7...Recorder

Claims (1)

[Claims] (1) Detect the amount of change in the measurement target item during measurement/testing with a detection device, process the detection signal with an arithmetic processing device,
This is a method of recording the obtained measured values on a recorder, in which the measurement/test mode is stored in the arithmetic processing device in advance, and the arithmetic processing procedure for the detection signal from the detection device is also memorized for each mode. Measurement/test measurement values characterized in that the arithmetic processing unit determines the test mode, performs signal processing according to each mode, and records the value with a recorder when performing the measurement/test. Recording method.