Strain gauge sensors are among those mandatory devices that are able to optimally convert physical mass into electrical signals, which are further processed by secondary converters. Thus, it is possible to easily measure possible deformation changes of certain structures, to determine the presence of displacements of elastic elements. Displacement sensors can be used to determine the parameters of the linear shift or the angle of rotation, depending on the type of movement.
Experts identify different types of load cells , features characteristics of which depend on the subtleties and areas of application:
- force gauges are used to determine forces and loads;
- weighing equipment measures mass;
- pressure sensors are designed to measure this parameter in various environments;
- accelerometers are among the instruments used to measure acceleration;
- displacement and torque load cells.
Most strain gauge models are represented by a specialized element of increased elasticity, on which a strain gauge is additionally fixed. Under the influence of the mass of the load, the element, characterized by increased elasticity, undergoes deformation, after which it is enough to measure the resistance of the strain gage in order to determine the degree of deflection, proportional to the force applied to the structure.
It should be noted that strain gauges, the price of which is considered relatively low, are among the most vulnerable elements of any weighing system, since during operation they are influenced not only by aggressive manifestations of the external environment, but also by dynamic shock load, welding, numerous vibrations of various types, etc. That is why, at the time when maintenance is performed, such components are necessarily diagnosed in detail. In the framework of such inspections, its individual components are thoroughly analyzed. So, the presence of a special grounding cord is checked, the tightening force of the thread connections. The strain gauge is also examined for traces of rust and damage, the weight indicators are additionally tested, the summing boards, etc., are examined the condition of the cables, as well as the tightness of the cable glands.
