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Liberty - The Forerunner in Electromagnetic Tracking Technology


Polhemus is a true pioneer in motion tracking, used in a broad range of applications.  Liberty is the fastest, most accurate, scalable electromagnetic tracker available.  State of the art digital signal processor (DSP) electronics make it a perfect real-time solution for 6deg. of freedom needs.  Liberty was designed with advanced A/C technology and ease of use and power to fit a variety of user applications.  

Liberty incorporates an unprecedented speed of 240 updates per second per sensor while providing the most accurate and consistent data.  Liberty comes standard with Windows 2000/XP GUI and a comprehensive, easy to use Software Developers Kit (SDK) The GUI allows four independent user definable profiles for setting system parameters such as filtering, output formats, coordinate rotations, and many more.  Liberty incorporates state of the art Digital Signal Processor (DSP) electronics in concert with A/C magnetics to provide the user with improved signal-to-noise ratios which increase range, stability, resolution, and speed.  

Features:

  • Update Rate 
  • Scalable - four sensors are available on the base product, but you can add a single circuit board for a total of eight sensor channels
  • Communications Interface - Liberty comes standard wtih both an RS-232 serial interface and USB
  • Distortion Sensing - each sensor is able to detect distortion in the environment, alerting the user to make appropriate changes if necessary
  • Multiple user Definable Profiles
  • Multiple Output Formats

Components:

  • Liberty includes a System Electronics Unit (SEU), one sensor, and one source.  you can easily expand the system by adding three additional sensors with the factory installation of an additional circuit board, four more for a total of eight sensors.  Optional accessories are also available.
Polhemus is a true pioneer in motion tracking, used in a broad range of applications.  Liberty is the forerunner in electromagnetic tracking technology.  It is the fastest, most accurate, scalable electromagnetic tracker available.  State of the art digital signal processor (DSP) electronics make it a perfect real-time solution for 6deg. of freedom needs.  Liberty was designed with advanced A/C technology and ease of use and power to fit a variety of user applications. Note that the 60 Hz AC signal used by Liberty makes it unsuitable for use during EEG / EP recordings.  For such an application, an optical or video based capture system would be a better choice.

Specifications:


Degrees-of-Freedom 6DOF
Number of Sensors 1-16
Update Rate 240 Hz per sensor)
Static Accuracy Position 0.03in
Static Accuracy Orientation 0.15° RMS
Latency 3.5ms
Resolution Position at 30cm range 0.00005 in 0.00013 cm
Resolution Orientation 0.0004°
Range from Standard TX2 Source Up to 5 feet or 1.52 meters
Extended Range Source Up to 15 feet or 4.6 meters
Interface RS-232 or USB (both included)
Host OS compatibility
GUI/SDK XP/Vista/Win7 (32-bit and 64-bit)
Linux: Open-source application available