The Charpy impact test is performed to determine the notch toughness. The test is carried out in such a way that the Charpy impact pendulum is lifted to the starting height and allowed to swing. On the way, the pendulum hits the specimen of material and breaks it. The difference between the initial and final height of the pendulum is the energy absorbed by the fracture event. The device was originally developed for the purpose of testing metal materials, but today it is increasingly used for plastics. In most cases devices with an analogue display of results are being used in practice, but they provide only limited resolution, that’s why they are being replaced by more expensive devices with digital output results. In this thesis, we introduced a new measurement system based on a
microcontroller for information processing and a rotary encoder for measuring the angle. The measurement system can be attached to a Charpy impact test device. The design of the measuring system started with the production of a prototype circuit and was followed by the production of a printed circuit board. Finally, a microcontroller was programmed. The result is a measuring system that prints impact energy with satisfactory accuracy.
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