The split Hopkinson pressure bar (SHPB)- technique was developed for dynamic testing of materials but can be extended to other fields. Recent research results show that this is a promising technique for dynamic calibration of force transducers. In the modern SHPBtechnique incident, reflected and transmitted pulses are measured with strain gauges mounted on the bars. This paper describes a mathematical model of a principle SHPBsystem. The model is based on one-dimensional wave propagation theory. The model has been used to simulate the calibration of a force transducer up to 40 kN with a loading pulse having a duration of 500 µs. With this technique it is possible to combine high forces with short impulses. The technique also allows for measurement of transducer deformation making it possible to study the dynamic characteristics of the transducer.

World-wide we handle high precision transducers in the quantity torque as well as force for comparisons in measurement. These transducers are used as a reference in calibration machines, also. Here the disturbing effects caused by specimen the directly coupled, are responsible for a loss in accuracy. At primary torque standard machines air bearings guarantee the precision of the torque value produced by beam mass combination. Air bearings are responsible to keep the precision of torque calibration machines.

The physical model for the subdivision of the kilogram into the decade from 1 kg to 100 g was adapted for the measurement system where weight support plates have to be used. That is the case when combinations of weights with different nominal masses are compared. For this purpose the calibration procedure was modified to eliminate the unknown masses of the support plates. The equation was derived to take into account various influences on the measured mass differences. The influence of the plates on the measurement uncertainty budget and on the estimates of unknown masses of weights was studied into the decade. The analysis of results shows that the application of the support plates influences the measurement uncertainty to a small extent and also confirms the adequacy of the used model.

Paper presents results of the investigation on the magnetoelastic properties of Fe_73.5Nb₃Cu₁Si_13.5B₉ alloy in amorphous and nanocrystalline state as stress and force sensor. The new method of applying stress to the ring core of sensor made of soft magnetic material such as nanocrystalline alloys is presented. In this method the distribution of stresses in the ring core is uniform, so even brittle magnetic materials (like nanocrystalline) may be used as stress sensors. The experimental results indicate that stress and force sensor applications require special parameters of the heat treatment of the sensing element. For this reason the optimal treatment parameters for the cores of inductive components should not be applied for cores of the stress sensors.

Contemporary intensive development of technology puts ever-increasing demands on the reliability of products. The increase in the reliability level is emphasised also in transport machines and equipments. This all requires a further improvement of the method of designing and strength checking of a construction.
A practical example of loading system analysis in presented which demonstrates use the special instrument to measurement of distribution the force and torsion moment in cardan-joint for control purposes and uses the special instrument to generally measurement of distribution random loading parameter.