JPH0799352B2 - Material testing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention amplifies an output signal from a load cell by a load amplifier, A / D-converts the amplified signal, and then processes the output value by a microcomputer. The present invention relates to a material testing machine having an output value measuring device adapted to measure.

[Prior Art] In the load cycle test of the material test, all the load settings are performed by the% setting, and the actually applied load is also read by the% reading. When the load cell capacity to be used is 500 kgf and the load to be loaded is 25 kgf, the% setting means that the load amplifier range is set to 20 (500 kgf / 20 =) 25 k
The gf load should be 100%.
And% reading means 10% set as described above.
It is to read the ratio of the load actually applied to the 0% load (25 kgf) as a percentage. So in this case,
The actual load (unit: kgf) must be calculated.

[Problems to be Solved by the Invention] However, when the above-mentioned handling is performed, it is necessary for a measurer to constantly convert from a predetermined load to the% load value, and from% reading to the actual load, and the efficiency of the measurement work is improved. There was a problem that it was bad and human error was likely to occur.

Therefore, it is an object of the present invention to provide a load measuring device of a measuring instrument capable of performing load setting and load reading in real units.

[Means for Solving Problems] The present invention adopts the following configuration in order to solve the above problems.

In other words, it is a material testing machine that amplifies the output signal from the load cell with a load amplifier, calculates the ratio of the actually applied load to the load obtained by dividing the capacity of the load cell by the load amplifier usage range, and outputs it. A capacity input means for instructing the capacity of the load cell, an amplifier range instructing means for instructing a use range of the load amplifier, a signal from the capacity instructing means and the amplifier range instructing means, and the actual load. And a microcomputer for converting the percentage of the applied load into an actual load value.

[Operation] From the load cell capacity instructing means and the amplifier range instructing means, signals indicating the detector capacity and the amplifier range at the time of measurement are input to the microcomputer and are calculated together with the output value signal from the load cell. Output value setting and output value reading can be displayed not only in% setting and% reading but also in actual units.

[Examples] FIG. 1 is a block diagram showing a configuration of an example in which the present invention is applied to a material test. The detected load signal from the load cell 2 attached to the material testing machine body 1 is amplified by the load amplifier 3, A / D converted by the A / D converter 5, and processed by the CPU 6. The load amplifier 3 is provided with an indicator for indicating the usage range of the load amplifier itself, and a signal indicating the range value is input to the CPU 6 via the I / O device 8. I / O device 8
In addition, a load cell capacity indicator 10, a load indicator 11, and a cycle setter 12 are further connected, and signals from these are also input to the CPU 6 via the I / O device 8.

The load cell capacity indicator 10 is for setting the capacity of the load cell 2 currently used in the measuring instrument.
The setting is changed for each load cell capacity used. Further, the load display 11 displays a load value based on the calculation result processed by the CPU 6, and the cycle setter 12 sets the cycle of the load cycle test.

Reading / reading of signals from these setting devices to the CPU6 is performed by the ROM / RAM7 connected to the CPU6 and the I / O device 8, and the CPU6 performs arithmetic processing based on these respective signals to perform arithmetic operations. The result is output to the above-mentioned load indicator 11 via the I / O device 8.

Not only the detected load signal from the load cell 2 but also a signal indicating the load cell capacity and a signal indicating the load amplifier range are input to the CPU 6, and the CPU 6 performs arithmetic processing based on these signals. The load display and load cycle setting on the cycle setting device 12 can be performed in actual units such as kgf without showing by% setting or% reading. The output value measuring device according to the present invention is
It can also be applied to measure the output values of other testers such as analyzers.

[Effects of the Invention] As is clear from the above description, according to the present invention, the output value setting and the output value reading in various measurement tests can be performed in actual units, and the user can change the output value from the predetermined value by a percentage as in the conventional case.
It is no longer necessary to convert the value or% reading into its output value, and it has become possible to improve the work efficiency of measurement / test and prevent conversion errors.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. 2 …… Load cell 3 …… Load amplifier (with load amplifier range indicator), 5 …… A / D converter, 6 …… CPU 10 …… Load cell capacity indicator

Claims (1)

[Claims] 1. A material test in which an output signal from a load cell is amplified by a load amplifier, the capacity of the load cell is divided by a range used by the load amplifier, and a ratio of the actually applied load to the load is calculated and output. A capacity instructing means for instructing the capacity of the load cell, an amplifier range instructing means for instructing a use range of the load amplifier, a signal from the capacity instructing means and the amplifier range instructing means, and A material testing machine provided with a microcomputer for converting the percentage of the load actually applied into an actual load value.