Security alarm in the context of "Reed switch"

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⭐ Core Definition: Security alarm

A security alarm is a system designed to detect intrusions, such as unauthorized entry, into a building or other areas, such as a home or school. Security alarms protect against burglary (theft) or property damage, as well as against intruders. Examples include personal systems, neighborhood security alerts, car alarms, and prison alarms.

Some alarm systems serve a single purpose of burglary protection; combination systems provide fire and intrusion protection. Intrusion-alarm systems are combined with closed-circuit television surveillance (CCTV) systems to record intruders' activities and interface to access control systems for electrically locked doors. There are many types of security systems. Homeowners typically have small, self-contained noisemakers. These devices can also be complicated, multirole systems with computer monitoring and control. It may even include a two-way voice which allows communication between the panel and monitoring station.

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👉 Security alarm in the context of Reed switch

The reed switch is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University, and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay. In its simplest and most common form, it consists of a pair of ferromagnetic flexible metal contacts in a hermetically sealed glass envelope. The contacts are usually normally open, closing when a magnetic field is present, or they may be normally closed and open when a magnetic field is applied. The switch may be actuated by an electromagnetic coil, making a reed relay, or by bringing a permanent magnet near it. When the magnetic field is removed, the contacts in the reed switch return to their original position. The "reed" is the metal part inside the reed switch envelope that is relatively thin and wide to make it flexible, resembling the reed of a musical instrument. The term "reed" may also include the external wire lead as well as the internal part.

A common example of a reed switch application is to detect the opening of a door or windows, for a security alarm.

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Security alarm in the context of Motion sensing

A motion detector is an electrical device that utilizes a sensor to detect nearby motion (motion detection). Such a device is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. They form a vital component of security, automated lighting control, home control, energy efficiency, and other useful systems. It can be achieved by either mechanical or electronic methods. When it is done by natural organisms, it is called motion perception.

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Security alarm in the context of Buffer zone

A buffer zone, also historically known as a march, is a neutral area that lies between two or more bodies of land; usually, between countries. Depending on the type of buffer zone, it may serve to separate regions or conjoin them.Common types of buffer zones are demilitarized zones, border zones and certain restrictive easement zones and green belts. Such zones may be comprised by a sovereign state, forming a buffer state.

Buffer zones have various purposes, politically or otherwise. They can be set up for a multitude of reasons, such as to prevent violence, protect the environment, shield residential and commercial zones from industrial accidents or natural disasters, or even isolate prisons. Buffer zones often result in large uninhabited regions that are themselves noteworthy in many increasingly developed or crowded parts of the world that unintentionally create a de facto wildlife sanctuary.

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Security alarm in the context of Ring (company)

Ring LLC is a manufacturer of home security and smart home devices owned by Amazon. It manufactures a line of Ring smart doorbells, home security cameras, and alarm systems. It also operates Neighbors, a social network that allows users to discuss local safety and security issues, and share footage captured with Ring products. Via Neighbors, Ring could also provide footage and data to law enforcement agencies to assist in investigations with user’s consent constraint.

The company was founded in autumn 2013 by Jamie Siminoff as the crowdfunded startup Doorbot; it was renamed Ring in autumn 2014, after which it began to receive equity investments. It was acquired by Amazon in 2018 for approximately $1 billion.

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LINKED FROM (PARENTS)
← Motion sensing ← Buffer zone ← Motion detection ← Ring (company) ← Reed switch
LINKS TO (CHILDREN)
Burglary → Theft → Property damage → Car alarm → Prison → Fire alarm system → Closed-circuit television → Surveillance → Access control → Computer and network surveillance →