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  2. Car alarm - Wikipedia

    en.wikipedia.org/wiki/Car_alarm

    A car alarm is an electronic device installed in a vehicle in an attempt to discourage theft of the vehicle itself, its contents, or both. Car alarms work by emitting high-volume sound (often a vehicle-mounted siren, klaxon, pre-recorded verbal warning, the vehicle's own horn, or a combination of these) when the conditions necessary for ...

  3. Passive infrared sensor - Wikipedia

    en.wikipedia.org/wiki/Passive_infrared_sensor

    A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view. They are most often used in PIR-based motion detectors. PIR sensors are commonly used in security alarms and automatic lighting applications. PIR sensors detect general movement, but do not give ...

  4. Motion detector - Wikipedia

    en.wikipedia.org/wiki/Motion_detector

    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 ...

  5. Unattended ground sensor - Wikipedia

    en.wikipedia.org/wiki/Unattended_ground_sensor

    The gateway bridges U-UGS sensor field to the FCS network and relays motion alarm and image data. It's capable to be monitored locally by a soldier or remotely through a FCS network enabled modulevehicle. The intrusion node is a motion sensor that detects movement and is able to tell the difference between animal and human beings.

  6. Collision avoidance system - Wikipedia

    en.wikipedia.org/wiki/Collision_avoidance_system

    A collision avoidance system (CAS), also known as a pre-crash system, forward collision warning system (FCW), or collision mitigation system, is an advanced driver-assistance system designed to prevent or reduce the severity of a collision. [2] In its basic form, a forward collision warning system monitors a vehicle's speed, the speed of the ...

  7. PASS device - Wikipedia

    en.wikipedia.org/wiki/PASS_device

    A PASS device (personal alert safety system), also known as a distress signal unit (DSU) or ADSU (automatic distress signal unit), is a personal safety device used primarily by firefighters entering a hazardous or "immediately dangerous to life and health" (IDLH) environment such as a burning building. The PASS device sounds a loud (95 decibel ...