Curtain type sensor

memberpeace · Oct 15, 2008

I need about a meter long sensor like light curtain sensors but it needs to be one piece like sender and receiver at the same unit. It could be inductive proximity or photoelectric sensor, etc. 40 mm sensing distance is enough.
Are there any options of any brands like that?

keithkyll · Oct 15, 2008

Are you trying to sense a 1 meter area, and look for an object anywhere in the area? Use a Keyence Laser. Set it up so it's happy seeing 1 meter.

Longhorn · Oct 15, 2008

Hey,
If its for a safety application we use safety curtains or safety light guards is their proper name. Heres a sample:-

http://www.lightguards.co.uk/lightguards.html

Cheers

LH

Maj. Toxido · Oct 15, 2008

Safety Light Curtain

memberpeace said:
I need about a meter long sensor like light curtain sensors but it needs to be one piece like sender and receiver at the same unit. It could be inductive proximity or photoelectric sensor, etc. 40 mm sensing distance is enough.
Are there any options of any brands like that?

Try The SICK light curtain. I use a lot of it in the plant for safety of operator and production personnels.

www.sick.com

RussB · Oct 15, 2008

I do not know of anyone who does a reflective or diffuse style linear array, but check these out and think 'out of the box' could you use a mirror?
http://www.bannerengineering.com/en-US/products/8/Sensors/27/Measuring-Array-Sensors

tragically1969 · Oct 15, 2008

What type of application are you using this for, safety or part detection ?

The answer will vary wildly until you state this

memberpeace · Oct 15, 2008

I need it for part detection. There is carriage at the system. As soon as it brings two steel baskets on top it needs to confirm that they are there. Before, it was only one type of basket in use so it was easy. So just putting two inductive sensors were enough to detect them as they were standing at the same place all the time. Now different framed baskets stand in different places. That's why I asked for a meter long sensor or a sensor senses within a meter circled area. It needs to detect from the buttom of the baskets. I cannot put a mirror or second pair to the top.

kbpatton · Oct 15, 2008

Maj. Toxido said:
Try The SICK light curtain. I use a lot of it in the plant for safety of operator and production personnels.

www.sick.com

I agree with the SICK recommendation. They are meant for safety but it is perfectly acceptable to just use them for part detection. I am still a bit confused as to why a 1 meter sensor is required.

memberpeace · Oct 15, 2008

As they have 1 meter width. For safety reasons it is better to detect from bottom to top vertically not diagonally.

So could SICK work as one piece?

milldrone · Oct 15, 2008

memberpeace said:
I need it for part detection. I cannot put a mirror or second pair to the top.

Several years ago this product was the "cats' meow" for detecting logs or cants at the dropoff point on a sawmill carriage.

http://www.redwoodelectronics.com/VLS.html

.

kbpatton · Oct 15, 2008

memberpeace said:
As they have 1 meter width. For safety reasons it is better to detect from bottom to top vertically not diagonally.

So could SICK work as one piece?

Yes. You program them to extend the curtain as far as you want and the width of the field is adjustable as well. As I said, these are pricey because they are really designed to be used in place of light screens and other safety devices.

http://ecatalog.sick.com/Products/ProductFinder/relatedapplications.aspx?finder=Produktfinder&pid=13007&lang=en

memberpeace · Oct 15, 2008

You are right kbpatton

It was quite pricey. SICK PLS101-312 laser scanner. $5000, waavv!
I better create one or two robotic sensor to detect the baskets with motion. But I can't. Can I?

Keyence Laser seems good with long distance option. I will do a further investigation on it. I also look deeply into ultrasonic sensors. The problem is I haven't used them before in any application. I don't know much of their characteristics like their sensing distances or how wide their ranges. Do you have any information about that? May be I need a special one of them.

I couldn't have had a chance to look into video limit switches as PC was frozen twice in that website. I will do that with other PC may be.

Thanks for the advises so far. Look forward to hearing from you...

kbpatton · Oct 15, 2008

Found these guys as well.

http://www.acuitylaser.com/AR600/common-applications-steel-width.shtml

They seem to be geared more towards the steel industry but your situation might apply.

"Laser sensors are commonly used in steel hot mills because they afford an accurate, non-contact method of determining the position or dimensions of materials that are too hot to touch."

Curtain type sensor

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