Research of the new type of compression sensor

Abstract

Measuring process of physical parameters for mechatronic system well developed and available sensors covers vast amount of interest area. Nevertheless, there are areas with some requests for sensors with special properties. Many applications require sensors, able to operate in harsh conditions. This paper provides some attempt to create compression sensor for applications with temperatures over 350 °C and stiffness of sensor, close to concrete stiffness. Such sensor created and tested in order to obtain its reliability for long term measurement parameters, repeatability and dynamic mode of loading. Sensor sensitive parameter is electrical resistance and therefore data acquisition is widely available and convenient to implement. Experimental research performed using computer-controlled compression machine with several models of loading. Results of test statistically processed, and main parameters revealed as positive and fulfilling given requirements. Dynamic loading of sensor showed hysteresis of load-resistance characteristics and thus finds critical frequency for this particular dimension of sensor. Analysis of such compression force sensor request in the concrete structures or asphalt revealed high demand of such device, therefore requirements for thermal stability and structural resistance became essential. Presented results of experimental research and evaluation of sensor parameters reveals high potential of its implementing into structures for safety and operation mode definition.