Design Of Fire Alarm System Based On Single Chip Microcomputer

In recent years,rapid progress has been made in electronic technology and computer software and hardware technology.Fire alarm system and fire extinguishing system have been widely used in many fields.High-performance single chip microcomputer as control core has become a mainstream,due to its high operation stability,high precision and general good performance and low power consumption,these factors to ensure the accuracy and dependability of the alarm.The design of the circuit by ac-dc conversion circuit,voltage regulator circuit,gas sensitive sensor circuit,temperature monitoring circuit,d/a conversion circuit,single chip microcomputer control circuit,digital tube display circuit and wireless transmission circuit.Through these circuits can realize the data processing,data display system,time display blocks,status display block,fault detection,gas alarm alarm signal acquisition,wireless transmission,multiple water level real-time monitoring and fire fighting,and other functions.The software part USES ptotel to draw circuit diagram,Multisim10 simulation software for simulation,keilc51 programming single-chip computer.This design can complete the entire process from smoke temperature data acquisition and alarm to fire linkage,and can greatly improve the monitoring range due to wireless transmission of data.The above wireless data transmission signal sending and receiving methods do not have transmission error codes,reliable and practical,and reduce hardware cost in coding and decoding.According to the above encoding method,the signal transmission speed can reach 20 kbps.If the address frame(device number recognition)and the check frame are added in the data transmission protocol,this method will be more widely used in computer system.