Review of industrial temperature measurement technologies and research priorities for the thermal characterisation of the factories of the future

Abstract

As the largest source of dimensional measurement uncertainty, addressing the challenges of thermal variation is vital to ensure product and equipment integrity in the factories of the future. Whilst it is possible to closely control room temperature, this is often not practical or economical to realise in all cases where inspection is required. This paper reviews recent progress and trends in seven key commercially available industrial temperature measurement sensor technologies primarily in the range 0-50˚C for invasive, semi-invasive and non-invasive measurement. These sensors will ultimately be used to measure and model thermal variation in the assembly, test and integration (AIT) environment. The intended applications for these technologies are presented alongside some consideration of measurement uncertainty requirements with regard to the thermal expansion of common materials. Research priorities are identified and discussed for each of the technologies as well as temperature measurement at large. Future developments are briefly discussed to provide some insight into which direction the development and application of temperature measurement technologies are likely to head.

Simultaneous Distributed Acoustic and Temperature Sensing Using a Multimode Fiber

“…9(c)]. The difference between the temperature measured with our system and that one measured with the commercial thermistor is acceptable because most of commercial DTS systems offer ±1 °C absolute temperature error [20]. This error is mainly because of the different calibration techniques applied for the optical fiber DTS and thermistor.…”

Thermal compensation for large volume metrology and structures

“…This has led to the proposal of a hybrid approach [9,10] as suggested in Figure 2. In the upper part of the figure, the nominal geometry (provided by the CAD model) is used to make predictions about how deformations occur.…”

“…The aim of this paper is to explore a "hybrid approach" to metrology [9,10] in which measurements of a component (in non-ideal conditions) are used hand-in-hand with a nominal geometry model of that component. There is then a need to be able to map between measurement space and the nominal space.…”

Novel Approach of Non-linearity Analyses of Resistive Temperature Sensors

“…But the most common (about 50 %) are temperature measurements. For example, the average nuclear power plant has approximately 1500 control (measuring) points for temperature measurement, and large-scale chemical production has about 20 thousand of them [1][2][3].…”