The PST 55 and PST 110 are optical measurement/tracking systems that measures the 3D positions of either active or passive markers affixed to objects. Using this information, each PST-55/110 is able to determine the position and orientation of marked devices within a specific measurement volume.
The PST-55/110 is an optical measurement system that allows you to transform any object into a 3D measurement device. Each tracker is able to work independently and can be connected with more trackers to create an even bigger measurement volume (Specifications).
Features
Plug and Play
Each unit is pre-calibrated during production, so all you need to do is connect the PST to your computer (Windows/Mac OS X/Linux).
6 Degrees of Freedom
Any object with at least five markers can be tracked with six degrees of freedom (3D position and rotation). Single markers can also be used if rotation is not necessary.
Stand Alone
No need for additional boxes as each PST contains its own internal processing unit. This also means that processing power scales up as you connect multiple units.
Application Support
Applications can interface to the PST using either TrackD, VRPN, ART DTrack, or our own PST API.
Scalable
While a single PST is perfect for desktop tracking, a larger tracking volume can easily be achieved by connecting multiple trackers. In contrast to single camera systems, only a small overlap in tracking area is necessary.
Multiple Object Tracking
A single PST is able to track at least 20 objects simultaneously, where each object can have as much as 30 markers.
Technical Specifications
Performance
| Accuracy2 | Position: < 1 mm RMSE Orientation: < 1 deg RMSE |
| Refresh rate | 55 Hz for PST 55 110Hz for PST 110 |
| Operating temperature | 15 – 35 oC |
| Latency | Approx. 18 ms |
Usability
| Set up | Plug and play |
| Calibration | Pre-calibrated unit |
| Origin definition | Setting the reference point is a one click process |
| Units needed for 6 DOF tracking | One - each PST is a full 6DOF motion tracker |
| Expandable tracking area | Expandable with the number of tracking units. |
| Aligning units | Requires minimal overlap for registeration |
| Ambient Conditions | Normal indoor lighting conditions |
Devices and Markers
| # of targets | At least 15 independent 6DOF bodiesFor instance: simultaneous head and object tracking |
| Markers |
|
| Device creation | Simple procedure: mark device, train new device in seconds and use it |
Interfaces
| Processing | Internal processing unit in each PST |
| Client operating system | Windows (Vista, Windows 7), mac os (10.4 and higher), linux client applications 32 and 64 bit |
| Software interface | VRPN, trackd3, Dtrack emulation, data export to .CSV and via simple SDK |
| Output | Positional coordinates (x, y, z), orientation angles, euclidean transformation matrix |
| Synchronization | Hardware trigger in and out |
Hardware
| Illumination | Infrared (IR) with adjustable shutter speed |
| Weight | Approx. 2 kg |
| Size | 17.5cm(d) x 5.5cm(h) x 25.0cm(w) |
| Mounting | 1/4”-20 TPI mount hole (tripod mount) |
| Power supply | 12V, external power supply 110-240V, 50-60Hz |
| Power consumption | Max. 65W |
| Hardware interface | Ethernet |
- Preliminary Specifications, subject to change without notice.
- Precision measured using a grid of 7mm markers moved through the workspace up to a distance of 2.5m w.r.t. the tracking system.
- trackd is a trademark of Mechdyne, Marshalltown, IA, USA.
