基于51单片机的家居安防系统

Home Security System Based on 51 MicrocontrollerAbstract:In recent years,with the further implementation of a well-off society,the number of peoplebuying houses has been increasing,and people's awareness of the family's home living environment hasgradually increased.In particular,more attention has been paid to "security".However,there are still alot of accidents such as illegal burglary,fire,gas leakage and so on.Once it happens,the consequencesare immeasurable,which poses a great threat to home safety.Therefore,a home security system that canmonitor real-time intrusions in the current environment,monitor environmental factors such astemperature and smoke concentration in real time,and provide real-time wamings is an increasinglyurgent need.This article designs and implements a home security system.The system uses STC89C52RC singlechip microcomputer as the core processor,and uses human body infrared sensors,temperature sensors,and smoke sensors to collect data.Among them,the smoke sensor needs to convert the analogconcentration into digital signals through ADC0832.All data is printed by LCD1602.At the same time,the user can set the upper and lower temperature alarm threshold,smoke concentration alarm threshold,and choose whether to enter the arming mode.When the indoor temperature is too low or higher thanthe alarm value (the buming point is reached),the smoke concentration is higher than the alarm value,and when foreign matter invades,it will immediately trigger the buzzer and LED light to sound andlight alarm prompt.Keywords:Home security,STC89C52RC,temperature monitoring,smoke monitoring