Study And Development On Multiple Distribute Type Of The Temperature Measuring System

Along with the computer and technical development in information, thecomputer measures to control the system drive extensive adoption. MultipleDistribute Type of Temperature Measuring System is aim at measure need toemerge .Now most of the measured environment is the unmanned guard and thedispersion and its many road, the distribute problem is an actual problem that wewant to resolve, and the another is communication problem.This text to below several parts made the research work:1.Have analysis existing temperature measures' principle , type and key partand carried on systematic.2.According to the request of coustomer , use C8051F021 as Key processorof electron control unit, Have carried on the detailed design to measure part, asMAX6675 K thermocouple temperature conversion .Bottom the hardware design of a machine completeds to choose the K typethermocouple signal , expand to many roads switch and divide collect the signal,and MAX6675 to the conversion of the signal and communication, the data savingand handles etc. Among them, expanded to many roads switch CD4051 is completeprimarily each the measured signal be chosen at the different time , each timeonly have all the way the signal sends into the MAX6675 proceeds the temperatureconversion. The MAX6675 direct export figure signal to the C8051F021, waitingto communication with computer . The MAX6675 contains the K typethermocouple's cold compensate the electric circuit and can the convert electriccircuit with the temperature, combining can send into the single a machine insidedirectly, the C8051F021 contains temporary and saving data of function, it take a64 K FLASH memory, the record that can not only save the procedure code, canbut also used for data not and easily, saving space the enough next a machine has28 roads datas' saving request, this function although take up the bigger resources,only the communication is interrupted, the function would be use, therefore realattain the data deliver dependable to do not run off.3.The communication adopt wired and wireless transmission, developped thewired the dependable and the adaptability of the wireless, not only satisfy thedesign of the customer request, but also have a attempt in choose thecommunication fashion ,experiment the result express, although the cost in thedesign has the exaltation, result assuredness are very good.4.Basic on that circuit of hardware and electron control unit, have realizedthe unit design to the software procedure of the control system. Realizes to the thetemperature datas' choose, reasonable communication, correspondence break offreport to the police, data search and contrast and the forms for reporting etc..5.Using some anti-interfence measure in the hardware and the softwareimproved the reliability of the system.