11-05-2012, 12:37 PM
compatibility mode
[attachment=21865]
INTRODUCTION
Background
The idea of the project came from the analysis of previous projects with the highlight being a home security system done by Musa Sibusiso. The system used a temperature sensor to detect fire and a light dependant resistor for intruder detection. The project failed to look into the aspect of securing the system (password protection); also it did not outline how the sensors would deter intrusion.
The goal of the project is to utilize the after-market components and build an integrated home security system. System will be digital and fully customized, incorporating a 16x2 light crystal display (l.c.d.) and a 16 alphanumeric keypad. Each sensor is to be enabled individually, and system will use radio frequency range of 433MHz for data transmission. The system has a provision of three output devices to enable full alerting of the system user of any possible intrusion.
It is crucial to have an advanced alarm system which can secure the premises and valuables. A robber could injure or even kill the victims, so by installing alarm system in home, the chances to save the life of the victims may improve. The cost for the alarm system should be cheap. Therefore residents can buy the system at an affordable price and install it as fast as possible. In order to have such a system, we should look for hybrid home security alarm system which operates locally and reports remotely.
In any kind of alarm system, the most important part is the transmitters which are connected to the magnetic door locks and sensors like smoke detectors and movement detectors. Thus in order to make sure that the signal from the sensor is able to trigger the alarm, the transmitter should be in working condition for all the time. Since the end user of the alarm system has no or less knowledge on how to check the status of the sensors, it is convenient for them if the system itself could perform this particular task.
Problem Background
Burglar alarms have become standard equipment in stores and other businesses, and they're becoming increasingly common in private homes as well. This is due to that theft (or intrusion) and fire is a major safety concern in both home and industrial setting. Hence safety, fire, burglar and electronic alarms are designed to alert the user of a specific danger. Generally sensors are connected to a control unit via low-voltage wiring or a narrowband RF signal which is used to interact with a response device. Today there are a lot of home security alarm systems available on the market. Most of the alarm systems are very expensive and therefore not affordable by low or middle class families. Some systems which cost little do not provide reliable features like status checking.
The most common security sensors that are used to indicate the opening of a door or window or detect motion are passive infrared (PIR) sensors. New security systems are predominately hardwired to make them cheap to construct and maintain. Wireless installations are often faster and more economical. With some systems serving a single purpose of burglar or fire protection, combination systems provide both fire and intrusion protection. Systems range from small, self-contained noisemakers; to complicated, multi-zoned systems with color-coded computer monitor outputs. Perimeter security systems are divided to two main fields: home burglar alarms, and industrial burglar and perimeter intrusion detection.
In order to provide the public with a cost effective security system, it is important to design a low cost system with advanced feature which ease the residents’ life and benefits the public and also will decrease crime rate. System will use radio frequencies to transmit intrusion information to a remote station; radio frequency to be used is 433MHz as outlined by the ISM band regulations of POTRAZ. With the growing use of mobile phones, the idea to use DTMF and a phone line to communicate intrusion became void, thus pushing us to implement the solution with radio frequencies.
Objectives
In this project, the main objective is to design a cost effective alarm system with up to 8 zones. Therefore the alarm system could be owned by everyone without burdening them. Besides that the alarm system also should check the status of the sensors of the system regularly to ensure that the system could function without any failure. The failure of the sensor will be indicated by the transmitter through LEDs and the buzzer beeping sound.
Moreover, the transmitter can arm and disarm the system, and can even switch off any zone of the system individually according to user’s demand. The transmitter also consists of a 16X2 LCD to display the status of the system and a 4X4 matrix keypad to control the system. Furthermore, the transmitter has a default password which needs to be keyed to operate the system and only the owner has the PIN code.
The objective of the project is to build a prototype that:
• transmits data over radio frequencies i.e. radio frequency range of 433MHz (establishing communication through radio frequencies)
• can detect intruders and deter them by audio or visual outputs
• Improving safety for the residents. This will be achieved by eliminating the human error and human insufficiencies since system will be automatic.
• Ease of operation. The system will only warn its users and be able to be used by the relevant security officials.
• Anti-tampering of the system. The system being a hybrid prevents tampering problems that are encountered in other security systems.
• Sensors to be used for detection of security breaches and then the relevant officials notified through a receiver that gets a signal from a transmitter that is connected to the security control of the house.
• Digital display to show the threat that has been encountered, and LEDs to indicate the severity of the situation, for example (red to show a fire warning to indicate a need for evacuation)
[attachment=21865]
INTRODUCTION
Background
The idea of the project came from the analysis of previous projects with the highlight being a home security system done by Musa Sibusiso. The system used a temperature sensor to detect fire and a light dependant resistor for intruder detection. The project failed to look into the aspect of securing the system (password protection); also it did not outline how the sensors would deter intrusion.
The goal of the project is to utilize the after-market components and build an integrated home security system. System will be digital and fully customized, incorporating a 16x2 light crystal display (l.c.d.) and a 16 alphanumeric keypad. Each sensor is to be enabled individually, and system will use radio frequency range of 433MHz for data transmission. The system has a provision of three output devices to enable full alerting of the system user of any possible intrusion.
It is crucial to have an advanced alarm system which can secure the premises and valuables. A robber could injure or even kill the victims, so by installing alarm system in home, the chances to save the life of the victims may improve. The cost for the alarm system should be cheap. Therefore residents can buy the system at an affordable price and install it as fast as possible. In order to have such a system, we should look for hybrid home security alarm system which operates locally and reports remotely.
In any kind of alarm system, the most important part is the transmitters which are connected to the magnetic door locks and sensors like smoke detectors and movement detectors. Thus in order to make sure that the signal from the sensor is able to trigger the alarm, the transmitter should be in working condition for all the time. Since the end user of the alarm system has no or less knowledge on how to check the status of the sensors, it is convenient for them if the system itself could perform this particular task.
Problem Background
Burglar alarms have become standard equipment in stores and other businesses, and they're becoming increasingly common in private homes as well. This is due to that theft (or intrusion) and fire is a major safety concern in both home and industrial setting. Hence safety, fire, burglar and electronic alarms are designed to alert the user of a specific danger. Generally sensors are connected to a control unit via low-voltage wiring or a narrowband RF signal which is used to interact with a response device. Today there are a lot of home security alarm systems available on the market. Most of the alarm systems are very expensive and therefore not affordable by low or middle class families. Some systems which cost little do not provide reliable features like status checking.
The most common security sensors that are used to indicate the opening of a door or window or detect motion are passive infrared (PIR) sensors. New security systems are predominately hardwired to make them cheap to construct and maintain. Wireless installations are often faster and more economical. With some systems serving a single purpose of burglar or fire protection, combination systems provide both fire and intrusion protection. Systems range from small, self-contained noisemakers; to complicated, multi-zoned systems with color-coded computer monitor outputs. Perimeter security systems are divided to two main fields: home burglar alarms, and industrial burglar and perimeter intrusion detection.
In order to provide the public with a cost effective security system, it is important to design a low cost system with advanced feature which ease the residents’ life and benefits the public and also will decrease crime rate. System will use radio frequencies to transmit intrusion information to a remote station; radio frequency to be used is 433MHz as outlined by the ISM band regulations of POTRAZ. With the growing use of mobile phones, the idea to use DTMF and a phone line to communicate intrusion became void, thus pushing us to implement the solution with radio frequencies.
Objectives
In this project, the main objective is to design a cost effective alarm system with up to 8 zones. Therefore the alarm system could be owned by everyone without burdening them. Besides that the alarm system also should check the status of the sensors of the system regularly to ensure that the system could function without any failure. The failure of the sensor will be indicated by the transmitter through LEDs and the buzzer beeping sound.
Moreover, the transmitter can arm and disarm the system, and can even switch off any zone of the system individually according to user’s demand. The transmitter also consists of a 16X2 LCD to display the status of the system and a 4X4 matrix keypad to control the system. Furthermore, the transmitter has a default password which needs to be keyed to operate the system and only the owner has the PIN code.
The objective of the project is to build a prototype that:
• transmits data over radio frequencies i.e. radio frequency range of 433MHz (establishing communication through radio frequencies)
• can detect intruders and deter them by audio or visual outputs
• Improving safety for the residents. This will be achieved by eliminating the human error and human insufficiencies since system will be automatic.
• Ease of operation. The system will only warn its users and be able to be used by the relevant security officials.
• Anti-tampering of the system. The system being a hybrid prevents tampering problems that are encountered in other security systems.
• Sensors to be used for detection of security breaches and then the relevant officials notified through a receiver that gets a signal from a transmitter that is connected to the security control of the house.
• Digital display to show the threat that has been encountered, and LEDs to indicate the severity of the situation, for example (red to show a fire warning to indicate a need for evacuation)