Micro-electronics technology applications have been evolving in systems developed by Waddan Systems. The MAGI system shown here combines a commercial GPS unit with Waddan's Axlgyro based IMU mounted behind the back plane. Prior to that the sensing electronics for each axis used to be assembled on a couple of 100mmX150mm PCB. The size of Match Box IMU used in MAGI was 25mmX25mmX50mm. The match box IMU houses 7 tiny boards.
As a natural evolution of Match Box IMU, for TSPIGII the IMU was configured as single 50mmX50mm board, dubbed flat-pack IMU. The TSPIGII unit consists of a flat-pack IMU, a processor board with a dual core power PC, 2 GB RAM, and 16 GB Flash, a third board with a commercial GPS chipset, USB, Ethernet, RS232 and other power conditioning hardware. The TSPIGII systems measures 50mmX50mmX25mm. the system is programmed to provide three nav solutions-GPS alone, INS alone and tightly coupled solution with 50Hz update rate.
These two boards include higher level of miniaturization than that is incorporated in TSPIGII. In addition to all the features of TSPIGII, it includes a triad of magnetic field sensors and a temperature sensor. The IMU sensors and the GPS chipset are collocated in one board. For self-initialization, the GPS provides the initial latitude and longitude; measurements of Earth's magnetic field and gravity vector yield the orientation of IMU axes wrt to NED coordinates.
