Comparison of the responsiveness of ultrasonic oscillating temperature sensors (UOTSes) and conventional sensors to temperature inflection

摘要

Ultrasonic oscillating temperature sensorsud(UOTSes), in distinction to conventional temperatureudsensors, feature almost negligible settling time. Thisudproperty can be useful for detecting malfunctions, failuresudand misuses of heat exchangers. However, most exchangersudhandle substantial thermal masses, which obscure theuddetection of any temperature changes.udWe compared the responsiveness of conventionaludDS18B20 sensors and an UOTS to the change in theudtemperature gradient of over 3.5 kg of water using audposteriori records. Temperature inflection points wereudestimated by extending the curves for separate distinctudheating and cooling intervals that fit best and finding theirudinterception. For the UOTS, the interception occurred aboutud100 seconds sooner, making it a potential candidate foruddetecting heat exchangers’ irregularities.