Computerized alarm & security system

• Main Authors: Averia, Jane Go, Go, Annie Sy, Sy, Katheryn Dy, Yao, Annette Liao
• Format: text
• Language: English
• Published: Animo Repository 1988
• Subjects: Electronic alarm systems; Security systems; Signal processing; Detectors; Operating systems (Computers); Computer-design; OS and Networks
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/7185
• Institution: De La Salle University

Man's safety and security, being basic human requirements, are of prime importance to him. However, danger and risk are also part of man's existence. Thus, it is instinctive of man to find ways in order to protect himself. It is in recognition of this need of man that, this thesis project, Computerized Alarm and Security System, came about. Knowing the importance of safety and security in the life of the modern man, the primary objective of this thesis project is to come up with a security system that is both effective and efficient. Specifically, the aim of this Computerized Alarm and Security System is to use computer technology efficiently in order to automatically send signals from remote sites to the central office upon occurrence of abnormal conditions such as intrusion, violence, or fire. The central office must be able to access, call, cause interrupts, interrogate, and accept calls from the remote controller. Likewise, the remote controller must also be able to respond by evaluating and transmitting the status of the locality being monitored. During the occurrence of abnormal conditions, it must be able to automatically dial up and report these conditions to the central office. Lastly, the system must be able to handle false alarm, as well as arming and disarming of sensors and detectors. To meet these objectives, proper design methodology must first be incorporated so that implementation and operation would spell out effectivity and efficiency. An IBM personal computer is installed in the central office to monitor the security status of several remote sites and at the same time, receive calls from remote sites when abnormal conditions are occurring in that particular site. In each remote site, there is a remote controller which is of an intelligent stand-alone type. It detects abnormalities output by the sensors and/or detectors attached to the system, then validates it before generating the corresponding alarm without any human intervention required. Validating the signal means rechecking if the sensor responsible for the abnormal condition still remains in that condition after an elapsed time. This is necessary so as to avoid inevitable transients which may cause false alarms once in a while. The job of a remote controller does not end after generating an alarm. It will automatically call up the central office and inform the central computer of the abnormality that occurred. Therefore, each controller is equipped with a local modem. On the other hand, the IBM PC at the central office has the capability to receive calls from the remote site controller. Upon receiving a call, the central computer will first determine the abnormality detected, then messages will appear on the screen to inform the people at that office of the abnormal condition occurring in one of its registered remote sites. Thus, immediate emergency actions or measures can be taken. Aside from this, authorized persons at the central office can inquire about the current status of a particular remote site controller at any time of the day. Furthermore, another special feature of this system is that, as an added protection to all of its registered remote sites, automatic checking of all the status of the remote sites is performed by the system. This time, the central computer by itself will dial up a remote site controller through the modem and inquire about its status. Downloading of parameters to each remote site controller is another important feature of the system. This feature allows the initialization of the remote site controller as desired by the user. Lastly, file maintenance and report generation are utility programs provided by the central office software.