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Working principle of force, deformation and displacement measurement of tension machine

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The working principle of the tension machine is described:

1. The force measurement of tensile test machine is completed by force sensor, amplifier and data processing system. According to the data mechanics, under the condition of small deformation, the strain epsilon of an elastic element at a certain point is proportional to the force acting on the elastic element, and is also proportional to the displacement of the elastic. The sensor S type testing machine as an example, when the sensor was P the effect of tension, because the elastic element is adhered to the surface of the strain gauge, the strain and the external force P elastic element size is proportional, therefore the gage access measurement circuit, the output voltage can be measured by measuring the size of the output, then.


2. Deformation measurements are measured by deformation measurements, which are used to measure the deformation of the specimen in the course of the experiment. Two the chuck is installed, through a system memory structure and installed in the head at the top of the installation of photoelectric encoder measurement together, when the interval between the two chuck changes, reversing the drive shaft of photoelectric encoder, photoelectric encoder pulse signal will be output. The signal is then processed by the processor to obtain the amount of deformation of the sample.


3, the beam displacement measurement, the reason is the same as the deformation measurement, are measured by photoelectric encoder output pulse number to obtain the displacement of the beam.


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