Design And Realization Of Temperature Acquisition Device Based On1-Wire Bus

Granary and other important sites or the safety of the equipment is related to thebeneficial to the people’s livelihood strategy, every year the government invested a lotof manpower and material resources.。 Because they usually distance is generallylonger or spaced positions relative dispersion, more temperature test point, Whenusing artificial detection temperature workload greatly%Inefficiency、Monitoring anddetection easily missed a longer cycle。With the development of science andtechnology especially the progress of the modern electronic technology, in recentyears, intelligent equipment for temperature detection in large numbers, This papergives a design scheme of temperature acquisition device based on1-Wire bus。 The host of the whole system of the project include the data center and themonitoring points from the monitor terminal two parts。This paper mainly discussesthe development of monitoring terminal process temperature acquisition device basedon1-Wire bus.。 Temperature acquisition device is mainly composed of the temperatureacquisition module、main control module、communication module、display moduleand other components。The main control module is mainly completed by8bitSTC12C5A32S2chip with high performance, ultra low power、high performanceprice ratio and strong processing ability。The temperature acquisition module based onthe1-Wire bus structure DS18B20multipoint temperature sensor MCU, saving I/Oresources, detection point can be easily。 DS18B20internal integration A/D, A/Dconversion to MCU provides the data (digital signal), thus greatly improving thesensor transmission distance and anti-interference ability。The communication moduleis composed of TSS721A terminal transceiver, data interaction with theSTC12C5A32S2single chip microcomputer。In the device field temperature datathrough the sensor,1-Wire bus transmission, for processing by the STC12C5A32S2microcontroller, the processed data from each monitoring point in real time displaysystem display.。And regularly through the communication module and M-Bus bus tocommunicate with concentrator (host), concentrated upload to the computer to carry on the temperature data acquisition。The system also set the upper and lower limits of temperature control, when the temperature gauge automatically send alarm。The monitoring terminal through field test, running well; And has the advantages of reliable communication, less investment for expansion。High precision, can be very good to meet the design requirements。And has good adaptability, a little transformation can also be applied to other wireless monitoring and control applications。...