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Portable, solar-powered, traffic light used when construction workers must narrow a 2-way street to a single lane and must emplace traffic controls for safety. Solar traffic lights can also be used during periods following natural disasters, when the existing street lights may not function due to power outages and the traffic is uncontrollable.
Driveway alarms have found great application in domestic and commercial applications, especially in retail drive thru applications. [1] Some of the more popular residential or commercial applications include motion-activated outdoor lighting systems, motion sensor street lamps and motion sensor lanterns.
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[2] The term lighting control system refers to an intelligent networked system of devices related to lighting control. These devices may include relays, occupancy sensors, photocells, light control switches or touchscreens, and signals from other building systems (such as fire alarm or HVAC). Adjustment of the system occurs both at device ...
It was designed to be used for railway systems. [2] In 1884, a number of American newspapers reported that the French railway companies were about to adopt an electric gate opener. “A catch connected with an electro-magnet keeps a gate closed,” reported The National Tribune on October 9, 1884. [3]
Occupancy sensor types include: PIR sensors, which work on heat difference detection, measuring infrared radiation.Inside the device is a pyroelectric sensor which can detect the sudden presence of objects (such as humans) who radiate a temperature different from the temperature of the background, such as the room temperature of a wall.