The tensile testing machine is suitable for various physical and mechanical performance tests of plastic plate, pipe, profile material, plastic film and rubber, wire and cable, steel, glass fiber and other materials. It is used for material development, physical property testing, teaching research, quality control and other indispensable testing equipment, as well as conducting other tests by exchanging various accessories.
The force value of the tensile testing machine is measured via the load cell, the amplifier and the data processing system.
It is known from data mechanics that, given a small deformation, the strain ε at a given point of an elastic element is proportional to the force on the elastic element and also proportional to the change in elasticity. Proportional.
Taking the example of the sensor of the S-type testing machine, the sensor of the effectsubjected to the tensile force P, because the surface of the elastic element is subjected to a strain gauge, because the strain of the elastic element is related to the magnitude of the external force P. It is directly proportional so the strain gauge is connected to the measuring circuit and the output voltage can be measured and then the force can be measured.
The deformation is measured 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. When the distance between the two chucks changes, rotate the shaft of the photoelectric encoder, and the photoelectric encoder will output a pulse signal.
Then the signal is processed by the processor and the deformationng of the sample can be determined.
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.