Ascension Technologies Corporation discontinued the production of the Flock of Birds. Replacement products are the 3D Guidance trackSTAR and driveBAY.

Hy-BIRD fuses optical and inertial technologies into one compact tracking solution. Its primary optical technology outputs highly accurate, fast tracking data. A fully integrated inertial tracker seamlessly continues tracking whenever the optical scanner is blocked or its field of view exceeded.

  • Fused data streams for flawless 360° tracking
  • Wide operational temperature range for inertial sensors
  • High speed tracking with minimal lag
  • Robust inertial sensor with embedded microprocessor
Critical Features Key Benefits
240 optical measurements/second / 70-75 measurements/second in hybrid mode Fast updates with no discernable lag
Full 360° coverage no FOV limits
IR laser scanning technology with temperature compensated, calibrated inertial sensors Accurate, undistorted tracking in fixed, motion-based and mobile environments
Built-in optical correction for inertial drift Constant data flow without jumps or interruptions
Small footprint for emitter and detectors Easy set-up with minimal impact on cockpit/vehicle real-estate
Fast, one-time calibration for misalignments Flexible placement of optical and inertial sensors on helmet
Ascension Hy-BIRD

Hy-BIRD is composed of an optical scanning unit with embedded electronics (above) and two head-mounted sensors - optical and inertial. The optical sensor can be seen in the right foreground. Optical and inertial data streams are fused and transmitted to a host computer via a USB serial adapter.

Ascension Hy-BIRD
  • Helmet Tracking
  • Simulators & Trainers
  • Virtual Reality
  • Military Vehicles
  • Situational Awareness Systems
  • Biomedical Instrument Registration and Gating
  • Biomechanical Measurement and Analysis
Degrees of Freedom 6 (Position and Orientation) for optical mode / 3DOF for inertial or hybrid mode
Tracker Field of View 360°
Measurement Rates Optical mode only: 240 Hz / Inertial mode only: 100 Hz / Hybrid mode: 70-75 Hz
Interface RS-232 via USB serial adapter
RS-232 Reporting Time 1.0 ms
Prediction laserBIRD only
Range All attitude coverage from 0.15 m to 1.83 m
Positional Accuracy 0.7 mm RMS
Positional Resolution @ 1 m: 0.1 mm
Angular Accuracies laserBIRD: 0.5°
Angular Resolution laserBIRD
Optical Scanner Dimensions 32 cm x 9 cm x 4 cm (L x W x H)
Scanner Weight 1.53 kg
Laser Sensor Sensor Dimensions 10 cm x 9 cm x 1 cm (L x W x H)
Inertial Unit Dimensions 6.5 cm x 9 cm x 2.5cm (L x W x H)
Inertial Unit Weight 74.6 g
  • EMC: EN 61326-1: 1998; 47 CFR: Part 15; Subpart B; Class A limits
  • Safety EN 61010-1: 1995
  • Laser Safety FDA/CDRH: 21 CFR 1040.10-11 Laser Hazard Classification: Class 1 CE: EN 60825-1 laser Hazard Classification: Class 1

More Information

Ascension Hy-BIRD