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omayma



Number of posts : 255
Registration date : 2007-07-04

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PostSubject: Sensors   Sensors Icon_minitimeThu Jul 05, 2007 9:51 pm

write whatever u find out about Sensors ..!
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omayma



Number of posts : 255
Registration date : 2007-07-04

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PostSubject: Re: Sensors   Sensors Icon_minitimeFri Jul 06, 2007 12:20 am

Motion Sensors



i guess we mentioned it,..we bardo el team el tany elly kan gambena last time kan beyetkalem 3anha,...so it's not a very innovative idea Rolling Eyes



Quote :
devices that are wired into your lighting system. They monitor the area for motion and when some is detected, instantly turn on your lights. This is great for illuminating your arrival at home or turning your exterior lights on when an intruder enters your property. Regardless of the reason for triggering the motion sensors, your outdoor lights are only on for a tiny fraction of the night. If there is no activity, the lights are never turned on. If (as is more typical) there are a small number of visitors, your lights are on for a few minutes each night. You can easily configure the sensors to leave the lights on from 30 seconds to 30 minutes. Regardless, the energy (and monetary) savings are huge!


the whole topic:
http://starrynightlights.com/blog/?p=24
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omayma



Number of posts : 255
Registration date : 2007-07-04

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PostSubject: Re: Sensors   Sensors Icon_minitimeFri Jul 06, 2007 12:50 am

Light Sensors



Quote :
Automatic controls for lighting, common in commercial buildings, are now available in a variety of options for residences ranging from a simple outdoor light fixture with a built-in photosensor to whole-house programmable controls that can activate lights for various scenarios (e.g., time of day, vacations, entertaining) from a central command center. Once a luxury for the wealthiest homeowners, centralized lighting controls are now affordable to the average homeowner.

Controls can switch lights on and off, or dim lights based on input from sensors which include simple timers, occupancy sensors to detect motion or infrared radiation from a person, or photosensors which operate lights or adjust light levels based on the amount of available daylight. There are also sensors, suitable for accessibility, that operate lighting by voice or sound. Many systems include the option of remote control via phone, computer, or a standard remote control.


the whole topic here:
http://www.toolbase.org/Technology-Inventory/Electrical-Electronics/lighting-controls





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see also:
http://www.amazingcontrols.com/Residential/LightingControl.html
http://www.amazingcontrols.com/Residential/EnergyManagement.html




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Quote :


Occupancy Sensors


Occupancy sensors are the most common lighting control used in houses today. Two technologies dominate: infrared and ultrasonic.

Infrared sensors detect temperature changes in a room, and work well where the entire room is within the sensor's field of view.

Ultrasonic sensors use high frequency sound, much like bats do, to detect motion (even around corners).

Dual-technology sensors use both methods, increasing accuracy and flexibility, but at a higher price.

Even though lamp-running life may be somewhat shortened by increased switching due to occupancy sensors, the overall chronological life of lamps is usually extended by the reduced daily burn hours.



see also:
Time Scheduling
Bi-Level Switches
Day Lighting


source:

http://www.energyguide.com/library/EnergyLibraryTopic.asp?bid=austin&prd=10&TID=17269&SubjectID=8373

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as i said en schneider aslan bete3mel light control product ,....on my way i found Square D (a brand from scneider) products:

http://www.squaredlightingcontrol.com/residential.cfm


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Mohamed Gaber



Number of posts : 68
Registration date : 2007-07-06

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PostSubject: Re: Sensors   Sensors Icon_minitimeSat Jul 07, 2007 2:18 pm

Check this link,


http://news.bbc.co.uk/2/hi/technology/6272752.stm
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Sherif



Number of posts : 2
Registration date : 2007-07-07

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PostSubject: Re: Sensors   Sensors Icon_minitimeSat Jul 07, 2007 8:03 pm

ma3lesh ya shabab howa el mawdou3 beta3 el sensors matle3sh sahl awi bas momken teshoufou el site dah howa mesh sensors bas ya3ni fi fekra kowayess



http://scholar.lib.vt.edu/theses/available/etd-04072002-093147/unrestricted/research311.pdf
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