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Research and Design of the Intelligent Instrument for Measuring Temperature

Author: HanZhi
Tutor: MaHongTao
School: Hebei University of Science and Technology
Course: Measuring Technology and Instrument
Keywords: Temperature detection Smart meters PID Neural Network MATLAB LabVIEW K-type thermocouple
CLC: TH811
Type: Master's thesis
Year: 2010
Downloads: 169
Quote: 0
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Abstract


Temperature as a very important test parameter in the control of the industrial automation process , directly affects the control accuracy and therefore require more precise detection . Since a thermocouple having a high degree of accuracy , a wide temperature range of a wider and a low cost, etc. , so that in the automatic control of the temperature detected as the preferred . In this study, the thermocouple detection temperature , and SCM and neural network intelligent control algorithm combined technology , design lessons a reliable visual Intelligent Digital Thermometer to achieve the precise temperature detection . PID neural network it unlimited gradually approaching the thermocouple measurement information , and then on the actual design of the thermocouple signal conditioning circuits , and in resolving the thermocouple cold junction temperature compensation using a digital temperature sensor . Established based on the PID mathematical model of the neural network , by setting the number of neurons , connection weights initial value , through experimental method to determine the correspondence between actual temperature value of the thermoelectric power , and finally validated using MATLAB software to achieve . The hardware part of the K -type thermocouple ( nickel-chromium - nickel- silicon ) as a temperature sensor to the the AT89S52 microcontroller chip microprocessor, digital temperature sensor for thermocouple cold junction compensation , in order to achieve accurate measurement of temperature . The software part is mainly composed by two parts of the lower machine and the host computer . The system consists mainly of the application in the design of the next bit of the main program , data acquisition , and the keyboard and display routines . The lower machine will collect the data sent to the host computer via RS-232 serial communication using LabVIEW software in the host computer system programming , serial communication module , display module , data storage and PC monitoring interface programming , as sub- The program for the main program calls . And interactive interface design , to data analysis , processing , and real-time display .

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CLC: > Industrial Technology > Machinery and Instrument Industry > Instruments, meters > Thermal measuring instruments > Temperature measuring instruments
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