26-06-2012, 04:59 PM
Intelligent Residential Security Alarm and Remote Control System Based On Single Chip Computer
[attachment=25647]
INTRODUCTION
With the computer technology and control technology and
communicational technology’s development, people’s living
standard has improved increasingly. People's living
conditions have changed, Such as the living environment’s
security and how comfortable they feel. So the intelligent
residential building’s automatic emerge as the times require.
Intelligent residential must have safety precautions, anti-theft
alarm, fire alarm, toxic gas leakage automatic alarm and
emergency call. It is able to implement remote control for the
key equipment power. In recent years, with the progress of
technology and economy, the electronic anti-theft alarm
system has rapid development and a very wide application.
Now it does not only apply in many important government
departments, but also apply in the family.
SYSTEM COMPONENT
Intelligent residential security alarm and remote control
system constitutes as shown in figure 1. The system is
through telephone interface circuit and telephone network to
link up. 89C51 single chip computer dominates by MT8880
Dual Tone Multi-frequency (DTMF) codec with the
telephone network to exchange information[3]. When the
detection of dangerous situations, the dangerous situation
coded signal transfer from the corresponding detection
module through the antenna to master chip. The master chip
brings the corresponding alarm information according to
received signal. This part is to complete by the voice interface
circuit, which uses ISD1420. After users call the number of
system, users can control appliances according to sound by
the voice interface circuit.
SYSTEM SOFTWARE DESIGN
System software is composed of main program, remote
control subroutine, warning subroutine. In order for the
system in his idle time to enter a dormant mode, all the tasks
are completed in interrupted service routine.
A. Main program design
Figure 2 shows main program flow chart. It mainly
accomplishes initialize work, then the system enters a
dormant mode. Whether there is password input or imported
alarm. The results are processed accordingly. A method of
determining whether to provide a user with access to the
security system, enter a user password for verification by a
program in a computing device. When valid user leaves, the
main program waits for some time, automatically enters the
maximum security state. The main program regular calls
watchdog handling procedure, in order that the system is not
normal reset.
CONCLUSION
This paper presents intelligent residential burglar alarm,
emergency alarm, fire alarm, toxic gas leakage remote
automatic sound alarm and remote control system, which is
based on 89C51 single chip computer. The system
communicates with terminal through public telephone network
and mobile network, is able to dial preset telephone number and
alarm telephone number automatically. We know what has
happened according to tone dialer and where has happened. We
can set up and modify passwords, be able to record and tone
hints. We can use telephone or mobile phone to lay guards,
withdraw guards, remote control the power of appliances. The
alarm system has design innovation, multiply function, low
cost, high reliability and so on. The system enhances the level
of intelligent alarm system.
[attachment=25647]
INTRODUCTION
With the computer technology and control technology and
communicational technology’s development, people’s living
standard has improved increasingly. People's living
conditions have changed, Such as the living environment’s
security and how comfortable they feel. So the intelligent
residential building’s automatic emerge as the times require.
Intelligent residential must have safety precautions, anti-theft
alarm, fire alarm, toxic gas leakage automatic alarm and
emergency call. It is able to implement remote control for the
key equipment power. In recent years, with the progress of
technology and economy, the electronic anti-theft alarm
system has rapid development and a very wide application.
Now it does not only apply in many important government
departments, but also apply in the family.
SYSTEM COMPONENT
Intelligent residential security alarm and remote control
system constitutes as shown in figure 1. The system is
through telephone interface circuit and telephone network to
link up. 89C51 single chip computer dominates by MT8880
Dual Tone Multi-frequency (DTMF) codec with the
telephone network to exchange information[3]. When the
detection of dangerous situations, the dangerous situation
coded signal transfer from the corresponding detection
module through the antenna to master chip. The master chip
brings the corresponding alarm information according to
received signal. This part is to complete by the voice interface
circuit, which uses ISD1420. After users call the number of
system, users can control appliances according to sound by
the voice interface circuit.
SYSTEM SOFTWARE DESIGN
System software is composed of main program, remote
control subroutine, warning subroutine. In order for the
system in his idle time to enter a dormant mode, all the tasks
are completed in interrupted service routine.
A. Main program design
Figure 2 shows main program flow chart. It mainly
accomplishes initialize work, then the system enters a
dormant mode. Whether there is password input or imported
alarm. The results are processed accordingly. A method of
determining whether to provide a user with access to the
security system, enter a user password for verification by a
program in a computing device. When valid user leaves, the
main program waits for some time, automatically enters the
maximum security state. The main program regular calls
watchdog handling procedure, in order that the system is not
normal reset.
CONCLUSION
This paper presents intelligent residential burglar alarm,
emergency alarm, fire alarm, toxic gas leakage remote
automatic sound alarm and remote control system, which is
based on 89C51 single chip computer. The system
communicates with terminal through public telephone network
and mobile network, is able to dial preset telephone number and
alarm telephone number automatically. We know what has
happened according to tone dialer and where has happened. We
can set up and modify passwords, be able to record and tone
hints. We can use telephone or mobile phone to lay guards,
withdraw guards, remote control the power of appliances. The
alarm system has design innovation, multiply function, low
cost, high reliability and so on. The system enhances the level
of intelligent alarm system.