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Home
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> Flock of Birds
 The
Flock can be configured to track
from one to four sensors simultaneously
with one or more RS-232 interfaces
to a host computer. Long range
coverage is easily added by
"clicking in" our Extended-Range
Transmitter (ERT/ERC). For high
speed operations, add more RS-232
ports and use our Fast Bird
Bus (FBB).
Click
here to download the product
brochure (PDF).
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Three separate transmitter options are available for use with our Flock of
Birds magnetic trackers. Whether
you want to track motions at short,
mid or long range, we have the right
option for you.
Choices run from a small lightweight
transmitter designed for precise,
close-range usage to a powerful
long-range transmitter pair, providing
enough coverage for multiple performers
to be tracked throughout a full-sized
room.
The following chart will help you
choose the right one for your applications.
| Short-Range
Transmitter |
Mid-Range
Transmitter |
Extended-Range
Transmitter |
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Up to
+3 ft (0.9 m) coverage |
Up to
+4 ft (1.2 m) coverage |
Up to
+10 ft (3.0 m)
coverage |
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Set-up & Use:
This small, light-weight
transmitter is often mounted
on an articulated arm that
can be brought close to its
sensors. Especially useful
for high accuracy medical
applications. |
Set-up &
Use:
Our mid-range transmitter
is ideal for desktop applications
in environments containing
conductive metals. |
Set-up &
Use:
One or two ERTs* can be operated
in tandem to provide full
coverage over 10 ft x 15 ft(3
m x 4.5 m) range of operation.
Available with mounting stands. |
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*Requires customer software modifications
to implement two ERTs.
- Head/Hand/Instrument Body
Tracking
- Virtual reality
- Flight simulation
- Scientific visualization
- Medical Imaging
- Entertainment
- Biomechanical/Human Factors
Analysis
- Rehabilitative Feedback
& Assessment
- 3D Graphics Control &
Manipulation
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Read
how people are using Flock of Birds
in real-world applications.
June 1, 2004:
Ascension
Flock Trackers Selected for F/A-22
Air Combat Simulation
December 1, 2003:
Ascension
Trackers Help Imaginations Bloom
at Chicago's Children's Museum
August 26, 2003:
Ascension
and BARCO Deliver Immersive Visualization
System to the University of Calgaray
for New Engineering Research Center
August 7, 2002:
Ascension
Trackers Enhance Oil and Gas Recovery
Visualization System
| Pulsed DC magnetic technology |
- Five times less susceptible
to distortion caused by
nearby metal than AC technology.
|
| Simultaneous Measurement of Multiple Sensors |
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No reduction of measurement rates.
|
| Available
in flexible configurations:
mid-range or extended-range |
-
Track up to 4 sensors at a range of up to 3.05 meters.
|
| 6 degrees-of-freedom |
-
Unrestricted range of motion.
|
| TECHNICAL |
Translation
range: |
Up
to +1.2m (3.94 ft) in any direction
with an option of 3.05m (10
ft) |
| Angular
range: |
±180°
Azimuth & Roll ±90° Elevation |
| Static
Accuracy Position*: |
1.8mm
RMS |
| Static
Accuracy Orientation*: |
0.5°
RMS |
| Static
Resolution Position: |
0.5mm
@ 30.5cm |
| Static
Resolution Orientation: |
0.1°
@ 30.5cm |
| Measurement
rate: |
Up
to 144 measurements/second |
| Outputs: |
X,Y,Z
positional coordinates and orientation
angles, rotation matrix, or
quaternions |
| Interface: |
RS-232C
with selectable baud rates to
115,200, USB converter is available.
|
| Format: |
Binary |
| Modes: |
Point
or stream |
| PHYSICAL |
| Transmitter: |
Mid-Range
Transmitter: 9.6cm cube with
3.05M cable, or extended range
transmitter option: 30.5cm cube
with 6.1m cable |
| Sensor: |
25.4mm
x 25.4mm x 20.3mm cube (or optional
3-button mouse) with 3.05M or
10.7M cable. Weight: 21 g (0.7
oz) without cable, 169 g (6.0
oz) with 3.05M cable, 394 g
(13.9 oz) with 10.7M cable. |
| Enclosure: |
24cm
x 29cm x 6.6cm |
| Power: |
User
provided or optional external
plug-in: US/European version |
| Environment: |
Metal
objects and stray magnetic fields
in the operation volume will
degrade performance. |
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*Accuracy
verified over range from 20.3cm
to 76.2cm.
Flock of Birds is a general-purpose
motion tracker suitable for
many applications. Biomedical
references in this document
are examples of what medical
companies have done with Ascension
trackers after obtaining all
necessary medical certifications.
Ascension trackers are not
certified for use in medicine
without the end user/OEM complying
with all pertinent FDA/CE
regulatory requirements.
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FCC Part 15, Class A
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CE: EN 50081-1, Class A
EN 50082-1, Class 2
EN 61010-1
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