A driveway alarm is a device that is designed to detect people or vehicles entering a property via the

driveway A driveway (also called ''drive'' in UK English) is a private road for local access to one or a small group of structures owned and maintained by an individual or group. Driveways rarely have traffic lights, but some may if they handle heavy ...

. A driveway alarm system is often integrated as a component of a system which automatically performs a task or alerts home owners of an unexpected intruder or visitor. Driveway alarms can be a vital component of security, automated lighting control, home control,

energy efficiency Energy efficiency may refer to: * Energy efficiency (physics), the ratio between the useful output and input of an energy conversion process ** Electrical efficiency, useful power output per electrical power consumed ** Mechanical efficiency, a rat ...

, and other useful systems.

Overview

A driveway alarm always consists of two components, a sensor and receiver. The sensor is used to detect people or vehicles on the driveway and the receiver is the device which alerts the user or owner to this detection. Wireless driveway alarms consist of three components, the sensor, receiver and a transmitter which sends the wireless alert signal to the receiver. A driveway

alarm ALARM (Air Launched Anti-Radiation Missile) is a British anti-radiation missile designed primarily to destroy enemy radars for the purpose of Suppression of Enemy Air Defenses (SEAD). It was used by the Royal Air Force, RAF and is still used by ...

may be connected to a

burglar 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. ...

that is used to alert the home owner or security service after it detects an intruder. Such a driveway may also trigger a

security camera A closed-circuit television camera is a type of surveillance camera that transmits video signals to a specific set of monitors or video recording devices, rather than broadcasting the video over public airwaves. The term "closed-circuit televisi ...

. Driveway alarms have found great application in domestic and commercial applications, especially in retail drive thru applications. Some of the more popular residential or commercial applications include motion-activated outdoor lighting systems, motion sensor street lamps and motion sensor lanterns.

Sensors

Three types of sensors are commonly used in driveway alarm systems: ; Passive infrared: Senses heat and motion. These sensors detect both vehicles and people but are prone to false alarms from animals. ;Magnetic probe: Uses a magnetic coil to detect moving metal nearby. Will only alarm when a vehicle moves by and are generally more costly than the passive infrared units. ;Rubber hose: When pressure is applied on top of the hose air is pushed up the hose triggering an alarm. Common in commercial applications. ;Radar Sensor: Uses radio waves to accurately determine both the presence and movement of vehicles. Radar sensors are unaffected by environmental conditions like fog, wind, rain, light, humidity, and temperature.

Wireless and wired systems

Driveway alarms come in both wired and wireless packages.

Infrared Infrared (IR; sometimes called infrared light) is electromagnetic radiation (EMR) with wavelengths longer than that of visible light but shorter than microwaves. The infrared spectral band begins with the waves that are just longer than those ...

and rubber hose systems are generally sold as wireless units while magnetic probe systems are equally available as hard wired and wireless systems. Choosing between wireless or wired systems is typically decided by the environment the unit is being installed in. The most common driveway alarms sold are wireless infrared units.

References

{{DEFAULTSORT:Motion Detector Security technology

Overview

Sensors

Wireless and wired systems

See also

References