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A security alarm[1] is a system designed to detect intrusion – unauthorized entry – into a building or area. Security alarms are used in residential, commercial, industrial, and military properties for protection against burglary (theft) or property damage, as well as personal protection against intruders. Car alarms likewise protect vehicles and their contents. Prisonsalso use security systems for control of inmates.
Some alarm systems serve a single purpose of burglary protection; combination systems provide both fire and intrusion protection. Intrusion alarm systems may also be combined with closed-circuit television surveillance systems to automatically record the activities of intruders, and may interface to access control systems for electrically locked doors. Systems range from small, self-contained noisemakers, to complicated, multi-area systems with computer monitoring and control.
The most basic alarm consists of one or more sensors to detect intruders, and an alerting device to indicate the intrusion. However, a typical premises security alarm employs the following components:
- Premises control unit (PCU), Alarm Control Panel (ACP), or simply panel: The “brain” of the system, it reads sensor inputs, tracks arm/disarm status, and signals intrusions. In modern systems, this is typically one or more computer circuit boards inside a metal enclosure, along with a power supply.
- Sensors: Devices which detect intrusions. Sensors may be placed at the perimeter of the protected area, within it, or both. Sensors can detect intruders by a variety of methods, such as monitoring doors and windows for opening, or by monitoring unoccupied interiors for motions, sound, vibration, or other disturbances.
- Alerting devices: These indicate an alarm condition. Most commonly, these are bells, sirens, and/or flashing lights. Alerting devices serve the dual purposes of warning occupants of intrusion, and potentially scaring off burglars. These devices may also be used to warn occupants of a fire or smoke condition.
- Keypads: Small devices, typically wall-mounted, which function as the human-machine interface to the system. In addition to buttons, keypads typically feature indicator lights, a small multi-character display, or both.
- Interconnections between components. This may consist of direct wiring to the control unit, or wireless links with local power supplies.
- Security devices: Devices to detect thieves such as spotlights, cameras & lasers.
In addition to the system itself, security alarms are often coupled with a monitoring service. In the event of an alarm, the premises control unit contacts a central monitoring station. Operators at the station see the signal and take appropriate action, such as contacting property owners, notifying police, or dispatching private security forces. Such signals may be transmitted via dedicated alarm circuits, telephone lines, or Internet.
Colorado Springs
Colorado Springs is a home rule municipality that is the county seat and the most populous municipality of El Paso County, Colorado, United States. Colorado Springs is located in the east central portion of the state. It is situated on Fountain Creek and is located 60 miles (97 km) south of the Colorado State Capitol in Denver.
At 6,035 feet (1,839 m) the city stands over 1 mile (1.6 km) above sea level, though some areas of the city are significantly higher and lower. Colorado Springs is situated near the base of one of the most famous American mountains, Pikes Peak, rising above 14,000 feet (4,300 m) on the eastern edge of the Southern Rocky Mountains. The city is home to 24 national governing bodies of sport, the United States Olympic Committee and the United States Olympic Training Center.
The city had an estimated population of 456,568 in 2015,[6] ranking as the second most populous city in the state of Colorado, behind Denver, and the 40th most populous city in the United States.[7] The Colorado Springs, CO Metropolitan Statistical Area had an estimated population of 712,327 in 2016.[8] The city is included in the Front Range Urban Corridor, an oblong region of urban population along the Front Range of the Rocky Mountains in Colorado and Wyoming, generally following the path of Interstate 25 in both states.
The city covers 194.9 square miles (505 km2), making it the most extensive municipality in Colorado. Colorado Springs was ranked number five by U.S. News & World Report on the list of 2016 Best Places to Live in the USA.[9]