Ultrasound Torch Height Controller - Revision history

Andrew Graham at 17:00, 30 March 2014

2014-03-30T17:00:45Z

← Older revision		Revision as of 17:00, 30 March 2014
Line 7:		Line 7:
	it looks like the ez4 might have a better beam geometry for this purpose.		it looks like the ez4 might have a better beam geometry for this purpose.

	a problem that exists with using any beam is what to do if you have a hole. you could use multiple sensors and take the minimum to deal with this situation. or you could point the beam up in the oposit direction and use a conical reflector, that ~~hits~~ the beam ~~a a~~ disc ~~so that~~ you get a read of a circular ~~region~~ around the whole torch. ~~the~~ software can eliminate any values less than some tolerance to deal with the reflectors, and from there take the minimums as the measured height. any of the problems with holes would be eliminated with this method.		a problem that exists with using any beam is what to do if you have a hole. you could use multiple sensors and take the minimum to deal with this situation. or you could point the beam up in the oposit direction and use a conical reflector, that directs the beam toward another disc. This gives you get a read of a circular pattern around the whole torch. The software can eliminate any values less than some tolerance to deal with the reflectors, and from there take the minimums as the measured height. any of the problems with holes would be eliminated with this method.

	[[Image:UltrasonicRangefinder.jpg\|400px]]		[[Image:UltrasonicRangefinder.jpg\|400px]]

2014-03-30T16:59:33Z

← Older revision		Revision as of 16:59, 30 March 2014
Line 10:		Line 10:

	[[Image:UltrasonicRangefinder.jpg\|400px]]		[[Image:UltrasonicRangefinder.jpg\|400px]]
	~~see~~ bottom right image for the double reflector to read a disc around the torch head.
			See bottom right image for the double reflector to read a disc around the torch head.
	although a little more required in the build stage, the geometry simplifies a lot of the issues that could arise from software, filtering errors, and the problem of what to do when you encounter a hole.		although a little more required in the build stage, the geometry simplifies a lot of the issues that could arise from software, filtering errors, and the problem of what to do when you encounter a hole.

2014-03-30T16:59:20Z

← Older revision		Revision as of 16:59, 30 March 2014
Line 6:		Line 6:

	it looks like the ez4 might have a better beam geometry for this purpose.		it looks like the ez4 might have a better beam geometry for this purpose.

			a problem that exists with using any beam is what to do if you have a hole. you could use multiple sensors and take the minimum to deal with this situation. or you could point the beam up in the oposit direction and use a conical reflector, that hits the beam a a disc so that you get a read of a circular region around the whole torch. the software can eliminate any values less than some tolerance to deal with the reflectors, and from there take the minimums as the measured height. any of the problems with holes would be eliminated with this method.

			[[Image:UltrasonicRangefinder.jpg\|400px]]
			see bottom right image for the double reflector to read a disc around the torch head.
			although a little more required in the build stage, the geometry simplifies a lot of the issues that could arise from software, filtering errors, and the problem of what to do when you encounter a hole.

2014-03-30T16:50:03Z

← Older revision		Revision as of 16:50, 30 March 2014
Line 4:		Line 4:

	https://www.adafruit.com/products/984		https://www.adafruit.com/products/984

			it looks like the ez4 might have a better beam geometry for this purpose.


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2013-07-06T21:04:13Z

← Older revision		Revision as of 21:04, 6 July 2013
Line 4:		Line 4:

	https://www.adafruit.com/products/984		https://www.adafruit.com/products/984

			----

			See also
			[[Sensing_Distance_from_Work_Piece]]

2013-06-19T00:41:33Z

Created page with "http://www.cnccontrols.com/thcontrol.asp with a $32 open source part: https://www.adafruit.com/products/984"

New page

http://www.cnccontrols.com/thcontrol.asp

with a $32 open source part:

https://www.adafruit.com/products/984