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HelicopterFlybarless Rotor Head SystemsOther › Analog Devices or Pin Point Sensors
04-07-2011 09:39 PM  6 years agoPost 1
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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i know futaba uses pin point and skookum uses analog devices sensor but from what i've seen AD is kicking PP's A$$ when it comes to gyro sensors !
The ADXRS649 is pin- and package-compatible to the ADXRS62x family and offers the highest rate of rotation sensing available with ±20,000°/sec and fast 3 millisecond (ms) startup for quick power cycling. This measurement range is extendable to ±50,000°/sec with the addition of an external resistor. It is ideally suited for applications where exceptionally wide measurement ranges are needed.

The ADXRS649 is a complete angular rate sensor (gyroscope) that uses the Analog Devices, Inc., patented high volume BiMOS surface-micromachining process to make a complete gyro on one chip. An advanced, differential, quad sensor design rejects the influence of linear acceleration, enabling the ADXRS649 to offer rate sensing in harsh environments where shock and vibration are present.
Man did you see that, ±20,000°/sec !!!!! and up to ±50,000°/sec !!!!

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04-08-2011 03:53 PM  6 years agoPost 2
ssmith512

rrKey Veteran

Indianapolis, IN USA

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How vibration resistant is it?? I think that is more desireable than being able to sense 20,000 degrees per second of rotation, at least in a nitro (or gasser) helicopter.

Steve

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04-08-2011 04:20 PM  6 years agoPost 3
TrevJonez

rrKey Veteran

St.George, Utah - USA

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that is 55.5 rotations a second. how could that ever be useful? unless it is basically an increase in resolution i would take vibration immunity over the crazy high rates.

Who cares... its just money...

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04-08-2011 04:52 PM  6 years agoPost 4
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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An advanced, differential, quad sensor design rejects the influence of linear acceleration, enabling the ADXRS649 to offer rate sensing in harsh environments where shock and vibration are present.

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04-08-2011 05:53 PM  6 years agoPost 5
Ben-T-Spindle

rrProfessor

Central Illinois

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A very fast rotation rate is actually a big disadvantage as it will be very sensitive to the slightest vibration. I think Futaba made a wise choice in selecting a sensor that was much more vibration tolerant than the competation.

... BTS

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04-08-2011 09:10 PM  6 years agoPost 6
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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That sensor has very fast rotation rate WITHOUT being sensitive to vibration, it uses an advanced, differential, quad sensor design to reject shock and vibration. the sensor i'm talking about "ADXRS649" is far superior to any sensor pin point has to offer.

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04-08-2011 09:53 PM  6 years agoPost 7
Heliguychris

rrKey Veteran

Perth, West Australia

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Ill belive that when you post the specs you have claimed to have for it.
And did you say you had some pix too?
cheers mate.

http://www.helifreak.com/attachment...35&d=1301776317

/ looks prudy

Licensed (CASA) UAV operator certificate holder 1-YFOF5-01 www.helicamaerial.com.au

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04-08-2011 10:01 PM  6 years agoPost 8
MrMel

rrProfessor

Gotland

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There is a lot more to choosing the right sensor for an application than sensor rate and vibration capabilities.

Make no mistake, the FBL solution providers test new sensors all the time to see if there is anything better, doing comparison against the existing solution they have.

The gyro chip manufacturers want to sell their chips, so they are quite fast to contact other manufacturers in same area and send samples.

But even then, when something like SS comes out with something that looks good on the paper, and even if it is more vibration sensitive, it might not be able to handle controls as good as others, due to other factors, that's what needs to be tested.

Technology goes forward, what will come during 2011 we can only guess, but it will be better than before.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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04-09-2011 12:11 AM  6 years agoPost 9
Wave

rrKey Veteran

Illinois

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Yeah a 50,000 degree per second sensor would probably not have the resoultion that a sensor would at 1000 degrees/sec.

I just like the way that vibrating ring sensor from Pinpoint looks.

50 years ago that thing would have been considered magic(like a flux capacitor ).

I'm sure the future holds some fancy devices.

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04-09-2011 03:09 AM  6 years agoPost 10
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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http://www.analog.com/en/products/m...80/newProd.html

http://www.pinpoint-gyro.com/products

Here you go HGC all the spec's and pic's you could possibly want !
sorry it took so long as it slipped my mind, is there anything else you would like ?

my main point was just look at the list of products that both companies have then you tell me who the leader is ?

there's only one world leader in high performance signal processing !

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04-09-2011 04:20 AM  6 years agoPost 11
Eco8gator

rrElite Veteran

Palm Beach, FL

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Man this post is funny, before I even bother to post anything Ill sit back and see what the lay person has to say about sensors and sensor choices...

Popcorn in hand.

C

Xera Motors
ProBar
Minicopter
Thunder Power

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04-09-2011 04:25 AM  6 years agoPost 12
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Does the resolution of these sensors decrease as the temperature increases?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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04-09-2011 07:38 AM  6 years agoPost 13
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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Does the resolution of these sensors decrease as the temperature increases?
well Eco8gator does it ? and whats a
lay person
someone that greets you when you step off the plane in hawaii ?

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04-09-2011 09:45 AM  6 years agoPost 14
Heliguychris

rrKey Veteran

Perth, West Australia

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Thanks mate, i thought youd forgot about me
is there anything else you would like ?
Maybe a Bar tab, and some dancing girls to serve?

Thanks again

Licensed (CASA) UAV operator certificate holder 1-YFOF5-01 www.helicamaerial.com.au

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04-09-2011 11:19 AM  6 years agoPost 15
Ben-T-Spindle

rrProfessor

Central Illinois

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Goofy Thread

I agree this is a very goofy thread. 20,000 degrees per second is crazy for an RC model – what was he thinking.

... BTS

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04-09-2011 01:49 PM  6 years agoPost 16
GetToDaChopper

rrElite Veteran

Las Vegas , NV

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if your talking about me ben, i never said anything about putting that sensor in a heli, i was just maveling at it's capabilities....

EDIT i think some of you really need to read posts more carefully.......

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