Specifications

The Enhancement of a Multi-Terrain Mechatron for Autonomous Outdoor Applications
96
Response times up to 20 Hz are possible due to the solid state sensing devices
allowing a faster response compared to gimballed fluxgate sensors. The module,
shown in Figure 4.13, comes with a protective plastic housing however functions per
price (US$700) does not compare well to other devices investigated and is therefore
not selected.
True North Revolution
The Revolution from True North Technologies
16
is a tilt compensated electronic
compass with a heading accuracy of 0.5° and a ± 40° pitch and roll operating range. A
key advantage of the Revolution, shown in Figure 4.14, is the quick connect external
serial interface. This allows connection of the included PDA for testing and
calibration during installation. A number of operating modes are available and the
combination of 3-axis magnetometer and 2-axis electrolytic tilt sensors provide a
20 Hz response time. The Revolution has good features suitable for a robotic platform
however, a completely solid state module was desired and the functionality-per-price
(US$500) did not compare well to other modules. The handheld PDA unit was
considered an unnecessary expense for a PC interfaced sensor system.
Figure 4.14 TrueNorth Revolution compass module
TruePoint Compass Module
The TruePoint compass module from Point Research Corporation (now available
from Honeywell) is shown in Figure 4.15. The unit is designed for high performance
16
http://www.tntc.com