The low-cost measured instrument with LabVIEW And RJ45

Abstract

The paper presents the design of a low-cost virtual instrument to measure temperature. Problem of development of instrument is the DB25 line limitation which is too short. To solve this problem, RJ45 is used with DB25 to be longer. There are several techniques in this paper such as DB25 to RJ 45 connection technique, Analog to Digital circuit technique, Software technique and Sensor technique. As a result, they make the students to understand how measurement system works by LabVIEW. Moreover, LabVIEW is also used to teach digital signal processing. The graphical programming approach is based on data flow theory which is an ideal platform for learning how signals flow from one function to another.The result of experiment can show that reliability of measurement between using RJ45 with DB25 and only DB25. The techniques of basic instrument showed in this paper can be used to apply to be satiable application in engineering projects. Moreover, These specially techniques make instruments as cheaper.

The Low Cost LabVIEW Wireless Instrument

“…LabVIEW interface is used to apply for different projects by various communication methods including DB25 [1], RJ45 [2], wireless data acquisition system (WDAS) [3], ZigBee [4], Indoor Environment Monitoring System (IEMS) [5], RF905 wireless module [6], and RF based wireless digital data transmission module (WDDTM) [7]. For instance, the low cost LabVIEW instrument using DB25 in ref.…”

“…RJ45 in ref. [2] is used to connect between a temperature sensor and a computer for monitoring. However, it cannot use in a wireless area.…”