DESIGN OF A MONITORING SYSTEM FOR TEMPERATURE MEASUREMENT WITH INDUSTRIAL SENSORS USING THE LABVIEW GRAPHICAL PROGRAMMING ENVIRONMENT

Abstract

Temperature is a magnitude referred to the notions of heat or cold, and it is one of the most used variables in the various sectors of the process control industry where its value is controlled, registered and measured together with other variables such as flow control, density, etc.

The research goal was to measure temperatures in laboratory and industrial environments, that is, to measure temperatures beyond 482°F. For this purpose, we have worked in two very well-differentiated stages; stage one or the "data acquisition" stage, where we worked with the Arduino Uno and Arduino Mega boards, displaying stated data on a 20x4 LCD and the Arduino serial monitor. At this stage, the "temperature" data collection was successfully tested using four sensors, two laboratory ones, the analogue sensor LM35, and the digital sensor DS1820B both with a measurement range of -67°F to 302°F and -58°F to 257°F, respectively. Then, two industrial sensors were used, namely Pt100 and Type K thermocouple, with a measurement range of -148°F to 752°F, and 0°F to 1472°F, respectively.Stage two consisted of calculating averages and storing and visualizing stated data using LabVIEW, the graphical programming program in its 2022 version. For data visualization, we used tables to collect the same date, time and temperature values retrieved from the industrial sensors and the DS1820B laboratory sensor.The proposed objectives were met since we could obtain industrial temperature values and store these parameters to calculate their maximum, minimum and average.