Hi Matt.
Thanks for your explanation!
Our incliniation sensor measures how much "out of level" the scanner is in both axis. This information is then automatically used by FARO Scene to compensate the data and make the scans horizontal. The compensation is also (always) applied when you used surveyed target coordinates unless the user turns the use of the information off in FARO Scene.
It offers a working range of +/-15° in which the user does not have to care for leveling if he does not want to. But it is not monitoring movements during the scan (not sure if this is really necessary at this short scan times).
Regarding the original question: I am absolutely conform with your opinion regarding accuracy
Best regards,
Oliver Bürkler
Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
- Oliver Buerkler
- Global Moderator
- Posts: 1446
- Joined: Mon Oct 06, 2008 9:44 am
- 15
- Full Name: Oliver Buerkler
- Company Details: FARO Europe GmbH
- Company Position Title: Director of Laser Scanning
- Country: Germany
- Skype Name: oliver_buerkler
- Linkedin Profile: Yes
- Has thanked: 38 times
- Been thanked: 12 times
- Contact:
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Oliver Bürkler
Director of Laser Scanning
FARO Europe GmbH
[email protected]
[email protected]
Twitter: FARO_LS_PM
Director of Laser Scanning
FARO Europe GmbH
[email protected]
[email protected]
Twitter: FARO_LS_PM
- Phil Marsh
- Administrator
- Posts: 2490
- Joined: Sun Aug 12, 2007 2:28 pm
- 16
- Full Name: Phil Marsh
- Company Details: Laser Scanning Forum Ltd
- Company Position Title: Director
- Country: UK
- Skype Name: phil.h.marsh
- Linkedin Profile: Yes
- Location: Barnsley, UK
- Has thanked: 119 times
- Been thanked: 36 times
- Contact:
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
With the Faro120 is it possible to setup over a known co-ordinate and backsight a single target with a known co-ordinate? I think this saves alot of time as less control is needed whilst on site.
- danielgadowski
- V.I.P Member
- Posts: 452
- Joined: Mon Jun 30, 2008 3:49 pm
- 15
- Full Name: Daniel Gadowski
- Company Details: Transport for London
- Company Position Title: Senior Engineer
- Country: UK
- Linkedin Profile: Yes
- Been thanked: 1 time
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Hi
No Phil, Faro will not be able to do that. You need compensator to be able to use the scanner like that. And I would expect Oliver, as a manufacturer’s representative, to know the differences between compensator and inclination sensor...
Dan
No Phil, Faro will not be able to do that. You need compensator to be able to use the scanner like that. And I would expect Oliver, as a manufacturer’s representative, to know the differences between compensator and inclination sensor...
Dan
- Phil Marsh
- Administrator
- Posts: 2490
- Joined: Sun Aug 12, 2007 2:28 pm
- 16
- Full Name: Phil Marsh
- Company Details: Laser Scanning Forum Ltd
- Company Position Title: Director
- Country: UK
- Skype Name: phil.h.marsh
- Linkedin Profile: Yes
- Location: Barnsley, UK
- Has thanked: 119 times
- Been thanked: 36 times
- Contact:
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Hi Dan,danielgadowski wrote:Hi
No Phil, Faro will not be able to do that. You need compensator to be able to use the scanner like that. And I would expect Oliver, as a manufacturer’s representative, to know the differences between compensator and inclination sensor...
Dan
So it works by resection then? Although I think as surveyors we tend to over control a site anyway for redunancy.
Phil
- danielgadowski
- V.I.P Member
- Posts: 452
- Joined: Mon Jun 30, 2008 3:49 pm
- 15
- Full Name: Daniel Gadowski
- Company Details: Transport for London
- Company Position Title: Senior Engineer
- Country: UK
- Linkedin Profile: Yes
- Been thanked: 1 time
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Hi Phil
Yes, it always works based on resection, just like HDS6000 and all other phase scanners. And in that case I believe control redundancy is quite crucial if you are after accurate resuls.
Dan
Yes, it always works based on resection, just like HDS6000 and all other phase scanners. And in that case I believe control redundancy is quite crucial if you are after accurate resuls.
Dan
-
- I have made 10-20 posts
- Posts: 15
- Joined: Wed Jun 10, 2009 2:17 pm
- 14
- Full Name: Mikhail Druzhinin
- Company Details: NanoSoft
- Company Position Title: expert
- Country: Russia
- Linkedin Profile: No
- Has thanked: 2 times
- Been thanked: 1 time
- Contact:
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Hi Oliver!Oliver Buerkler wrote: ...
It offers a working range of +/-15°
...
Can you tell me what will be the value of error at the 50m distance due to 15 degrees of inclination?
I think that 5' (not seconds) is more useful value of compensator range used in most of geodetic instruments, because it's difficult to calculate true corrections for measurements if instrument is out of 5' range.
Mikle
- joe.3dlm
- V.I.P Member
- Posts: 298
- Joined: Fri Nov 30, 2007 9:48 am
- 16
- Full Name: Joe Beeching
- Company Details: GeoSLAM Ltd
- Company Position Title: Customer Success Manager
- Country: UK
- Linkedin Profile: Yes
- Location: Nottingham, UK
- Been thanked: 1 time
- Contact:
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Dan,danielgadowski wrote:Hi
No Phil, Faro will not be able to do that. You need compensator to be able to use the scanner like that. And I would expect Oliver, as a manufacturer’s representative, to know the differences between compensator and inclination sensor...
Dan
It is possible to use a scanner in the way Phil descibes, even without a compensator. However, you must be certain that when the scan is levelled from the inclination sensor data, the centre of rotation is the same as the scanner's origin of measurement.
So knowing this, it is possible to set up over a known point, without levelling the scanner, and backsighting to a known Remote Object.
RiScan Pro certainly offers this function (and I am sure other scanner manufacturer's software does too), and it saves time in the field - the compromise of course is accuracy, as you are relying on the scanner's inclination sensor accuracy, and on only one control point, and on the measurement of the scanner's instrument height.
Joe
- danielgadowski
- V.I.P Member
- Posts: 452
- Joined: Mon Jun 30, 2008 3:49 pm
- 15
- Full Name: Daniel Gadowski
- Company Details: Transport for London
- Company Position Title: Senior Engineer
- Country: UK
- Linkedin Profile: Yes
- Been thanked: 1 time
Re: Architecture: Faro LS of Leica SS2 (Pulse or TOF)?
Hi Joe,
Perhaps I used a wrong word. OK, theoreticaly it is possible to do that, but I would say it's highly doubtfull you'll get mm accuracy that you will get with compensator. Making sure you set up the scanner directly above known point and that it is absolutly leveled is almost impossible to achieve, and here compensator comes into play. In any surveying instrument (total station, scanner with compensator) you need to make sure you are above known point and leveled within compensator's range.
Additionaly compensator takes active part in data capture, that means that every scanline taken is compensated. This takes into account any movements between the beggining and the end of the scan (comming off level).
I would agree, that perhaps phase based scanners don't need compensator as they survey too quickly, but we should make it clear that inclination sensor is something different from compensator.
And one final thought: is limiting the amount of targets to only one (and saving yourself perhaps one minute) worth capturing data you won't be able to use??
Perhaps I used a wrong word. OK, theoreticaly it is possible to do that, but I would say it's highly doubtfull you'll get mm accuracy that you will get with compensator. Making sure you set up the scanner directly above known point and that it is absolutly leveled is almost impossible to achieve, and here compensator comes into play. In any surveying instrument (total station, scanner with compensator) you need to make sure you are above known point and leveled within compensator's range.
Additionaly compensator takes active part in data capture, that means that every scanline taken is compensated. This takes into account any movements between the beggining and the end of the scan (comming off level).
I would agree, that perhaps phase based scanners don't need compensator as they survey too quickly, but we should make it clear that inclination sensor is something different from compensator.
And one final thought: is limiting the amount of targets to only one (and saving yourself perhaps one minute) worth capturing data you won't be able to use??