Infrared burglar alarm design controls which based
on the monolithicintegrated circuit
Abstract : The people living standard enhances unceasingly, to private property protection
consciousness in unceasing enhancement, thus set the new request to the security measure. This
design is to satisfy the prevention to rob the orchard security alarm system which, the burglary and
so on accident needs to design.
At present in the market condition equips mainly has the pressure totouch the hair
style burglar alarm, the switch electron burglar alarmand the pressure shields light the
hair style burglar alarmand so on each kind of alarm apparatus, but these kind of quite
commonalarm apparatuses all have some shortcomings. This system used hashotly
released the electricity infrared sensor, its manufacturesimple, cost low, installm the
antijamming ability strong, thesensitivity high, safe was reliable. This kind of security
installmenthiding, was not easily discovered by the bandits and thieves.Simultaneously its
signal after monolithic integrated circuit systemprocessing the convenience and P the C
machine correspondence, isadvantageous for the multiuser unification management.
This design designs two parts including the hardware and software. Thehardware
partially including the monolithic integrated circuit controlcircuit, infrared pokes head in the
electric circuit, the actuationexecution alarm circuit, the LED control circuit and so on the
partialcompositions. The processor uses 51 series monolithic integratedcircuits AT89S51,
the overall system is works under the systemsoftware control. The system program may
divide into following severalmodules: The data acquisition, the keyboard control, reports to
thepolice with the demonstration small steelyard function.
Key words: AT89S51 monolithic integrated circuit, infrared sensor,data acquisition,
alarm circuit.
