A Microprocessor-Based Novel Instrument for Temperature and Thermal Conductivity Measurements

This article presents the details of design and development of a mobile and low-cost measuring device that can directly measure the thermal conductivity of a material. The device does not need an AC power source and needs only a battery to operate. In its operation, the output of a platinum resistan...

Full description

Saved in:
Bibliographic Details
Published in:Experimental techniques (Westport, Conn.) Conn.), 2012-09, Vol.36 (5), p.62-70
Main Authors: Rehman, M., Abdul Mujeebu, M., Kheng, T.B., Abu Izneid, B.A.J.A.
Format: Article
Language:English
Subjects:
Battery
Characterization and Evaluation of Materials
Chemistry and Materials Science
Circuit boards
Computer programs
Devices
Heat conductivity
Heat transfer
Liquid crystal displays
Materials Science
Measuring instruments
Microcontrollers
Microprocessors
OrCAD Layout Plus
PIC Microcontroller
PT 100 Sensor
Technical Article
Temperature
Thermal Conductivity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This article presents the details of design and development of a mobile and low-cost measuring device that can directly measure the thermal conductivity of a material. The device does not need an AC power source and needs only a battery to operate. In its operation, the output of a platinum resistance thermometer (PT100 sensor) is amplified by LM324 Quad differential input operational amplifier and fed to Microchip PIC16F877A microcontroller through an analog-to-digital converter. The microcontroller calculates the thermal conductivity of the material by a given set of temperature difference and finally the result is displayed on a liquid crystal display. PIC Basic programming language is used to program the PIC microcontroller. The analog circuit and printed circuit board layout are designed using OrCAD software. It has been observed that the proposed device can measure the temperature with an accuracy of 0.5°C and thermal conductivity with an accuracy of 0.01 W/mm °C. The power consumption of the device is found to be 277.25 mW.
ISSN:0732-8818
1747-1567
DOI:10.1111/j.1747-1567.2010.00698.x