ABSTRACT
The introduction to this text utilizes the single computer to carry on temperature measurement and control intelligent method . And expanded systematic principle and structure and describe to MCS-51 one-chip computer exhaustivly. Examining warm system temperature sensor AD590, the signal amplifies and adopts and transports and puts circuit and two stepses of voltage-controlled LPF three times accurately partly. Two parts of circuit are made on a PCB board, and seal the form in a shielding metal box , it is very good through debugging performance . System this with the aid of sensor, A/D, D/A converter, expand that the interface and executive body go on. In the course of the ring closing type is controlled, real-time parameter of course gather in real time by sensor and A/D converter, and by the automatic record of the microcomputer, count the tabulation, then or the interface runs side by side to export the control signal through D/A converter , control movements of executive body, regulate and control.
This system has also expanded another temperature sensor and relevant circuit in addition, utilize it to carry on the room temperature to gather , and the mouth runs side by side to expand LED and show , can see the change of the temperature when change in environment temperature clearer in this way through 8255.
Have also discussed the hardware interface questions of this part of circuit and 8051 one-chip computer systems exhaustivly. This literary grace controls algorithms as the temperature control algorithm with PID, adopt the solid state relay and form and in charge of the relaxation one to shake circuit and carry out and drive the organization as it only, have reached the higher precision of controlling the temperature.
Keyword: stional Integral Differential arithmetic;Solid electronic peeker;8051 single chip computer;Temperature detecting and controlling;
