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As a testing device widely used in various industries, the tensile machine is used to test and analyze the mechanical properties of various metals, nonmetals and composite materials;
The tensile machine uses a Miniature DC servo motor as the power source, and the single-chip microcomputer displays the real-time test data and test status. The test process control is realized by the automatic control of the single-chip computer. which can automatically calculate the experimental data of the tested material. Value, fractional value and other data.
Tensile testing machine measurement principle
1. The measurement of the force value of the tensile testing machine is completed by the load cell, the amplifier and the data processing system measurement.
It is known from data mechanics that, assuming a small deformation, the strain ε at a given point of an elastic element pris proportional to the force on the elastic element and also proportional to the elastic deformation.
Taking the example of the S-type testing machine sensor, the sensor is subjected to the action of the tensile force P because the elastic member is bonded with a strain gauge, because the strain The magnitude of the elastic member is proportional to the Magnitude of the external force P. So connect the strain gauge to the measuring circuit, you can measure its output voltage, and then measure the magnitude of the force.
2. The deformation measurement is done with the deformation gauge, which is used to measure the deformation of the sample during the experiment.
There are two chucks on the device which are connected to the photoelectric encoder installed on the top of the gauge by a series of memory mechanisms. If the distance between the two chucks changes, bring the shaft of the photoelectric encoder into Drehung, and the photoelectric encoder outputs a pulse signal.
The signal is then processed by the processor and the deformation of the sample can be determined.
3. The principle of beam displacement measurement is roughly the same as that of strain measurement. The displacement of the beam is determined by measuring the number of output pulses from the photoelectric encoder.
Traction machine features:
An imported photoelectric encoder is used for displacement measurement. The controller adopts an embedded single-chip microcomputer structure and is powerful measurement and control software that integrates measurement, control, calculation and storage functions.
It has the function of automatically calculating stress, strain (must be equipped with a strain gauge), tensile strength and elastic modulus, and automatically counting the results; automatically records the power of the point,breaking point and predetermined point value or elongation;
A computer is used to dynamically display the test history and test curve and to process the data. After the test is completed, the curve can be zoomed in for further data analysis and editing via the graphics processing module, and reports can be printed. The product performance has reached the international advanced level.
