Water Screen Projection

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Hook Associate Join Date: Sep 2012 Posts: 31	Water Screen Projection 07/07/2014 12:02 AM
	Hello, I have a problem that I have spent 2 years testing. I have created a water screen to project still pictures and videos on using it a a projection screen. I have used various hole sizes from 1/8" down to 3/32 and a host of other diameter holes. Using various metal and plastic material testing with various pressures and water volume. The screens have been small scale averaging approximately 6'+- in nozzle length. I have used several rows of water down to a few rows drilled for the water to pass through. The screens will project a reasonable picture on it but haven't been able to increase the resolution of the picture to a acceptable level. I mu be missing something and sure could use any suggestions on how to increase the picture resolution on the water screens. Thanks in advance for any and all help. Hook
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lyn Guru Join Date: Oct 2008 Posts: 42355 Good Answers: 1693	#1 Re: Water screen projection 07/07/2014 12:14 AM
	Uh, this has already been done. Why more companies choose Tsunami Water Screens™ over all other systems: Easy-to-use Compact design Superior Image Quality Lightweight / Ultra-Portable Best Price Water Screen Available Worldwide! (Not an endorsement)
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SolarEagle Guru Join Date: Mar 2007 Location: by the beach in Florida Posts: 33392 Good Answers: 1817	#2 Re: Water screen projection 07/07/2014 12:42 AM
	You need a lot of nozzles, close together, with low pressure, tiny drops no misting...rear projection.... "There are 1,700 jets per every 10ft. section of screen. To scale, then, there are actually more 'pixels' than in a high-resolution monitor."" "....dumping 200 to 300 gallons per minute...." I make that about 14 nozzles per inch....must be like hypodermic needles.... http://livedesignonline.com/mag/wild-wet-video __________________ All living things seek to control their own destiny....this is the purpose of life
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Usbport Guru Join Date: Apr 2010 Location: Trantor Posts: 5363 Good Answers: 647	#3 Re: Water Screen Projection 07/07/2014 7:49 AM
	Try adding a small amount of white paint to help give the light something to reflect off of. __________________ Whiskey, women -- and astrophysics. Because sometimes a problem can't be solved with just whiskey and women.
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North of 60 Guru Join Date: Mar 2007 Location: Iqaluit, NU. Canada Posts: 1854 Good Answers: 140	#5 In reply to #3 Re: Water Screen Projection 07/07/2014 4:59 PM
	Good idea... or that water soluable fluid (a form of oil I think) added to water for use in water based hydraulic cylinder elevators. __________________ Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
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Nigh Guru Join Date: Jul 2005 Location: South east U.K. Posts: 3695 Good Answers: 93	#6 In reply to #5 Re: Water Screen Projection 07/08/2014 5:27 AM
	Would cutting oil used as coolant in lathes & mills do? Usually around 50:1 mix, some produce a white fluid. __________________ I didn't have a really important life, but at least it's been funny (Lemmy Kilminster 1945-2015)
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Troy36 Power-User Join Date: Mar 2007 Location: Wisconsin USA Posts: 305 Good Answers: 25	#4 Re: Water Screen Projection 07/07/2014 9:16 AM
	As the water accelerates the spacing between droplets will increase so it may be beneficial for the water to be at terminal velocity when it leaves the nozzles. I am just guessing. I have no experience in this. __________________ Troy
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phph001 Guru Join Date: Oct 2009 Posts: 1460 Good Answers: 30	#7 Re: Water Screen Projection 07/08/2014 5:32 AM
	You don't say explicitly in which direction your nozzles face but this site: http://www.sxsevents.co.uk/water-projection-screens-video-screen suggests upwards. "HOW DOES THE WATER SCREEN WORK? Developing our water screen technology took several months of work from our most senior staff, as well as the input from consulting engineers. This has resulted in us having some very unique and customised technologies. The basic principle of the screen system is to push water in an upward motion from the ground in a relatively flat spray. This gives a surface that we can project onto using high-power video projectors." That would suggest high-pressure water through fine nozzles.
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Hook Associate Join Date: Sep 2012 Posts: 31	#8 Re: Water Screen Projection 07/09/2014 11:00 PM
	Thanks to all who responded, gave some good ideas to explore, much Appreceiated. Hook
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Hook (1); lyn (1); Nigh (1); North of 60 (1); phph001 (1); SolarEagle (1); Troy36 (1); Usbport (1)

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