Motorola SYMBOL MINISCAN MSXX04 Guía de usuario Pagina 260

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Chapter 22: Sensors
Getting Started with the Gyroscope
Psion Mobile Devices Developers Guide
248
Default sensitivity
At 250 degrees per second this is
±9 milli-degrees per second
Default sampling rate
This is set to 100 Hz. The GUI applet samples at ~50 Hz.
Mobile Devices SDK
The Mobile Devices SDK provides APIs that enable an application to make a single reading of the gyroscope
output, or to register a callback for repeated readings.
22.3.1 Getting Started with the Gyroscope
For articles on Ingenuity Working that will guide you in getting started with the gyroscope see the following:
community.psion.com/tags/gyro/noteDG
22.3.2 Code Samples for the Gyroscope
For postings on Ingenuity Working that contain code samples that use the gyroscope see:
community.psion.com/tags/gyro/codeDG
22.3.3 Gyroscope API Elements
C: Gyroscope hardware on all computers with a gyroscope is read, using the Gyroscope group.
.NET: Gyroscope hardware on all computers with an accelerometer is read, using the
PsionTeklogix.Sensors.Gyroscope class.
22.4 Digital Compass (Magnetometer)
A magnetometer is a device for measuring the strength of the ambient magnetic field. The most common
use is as a compass.
The following Psion computers have an magnetometer that measures on three axes (heading, pitch
and roll):
•EP10 (7515)
Default sensitivity
This is set to
±4 gauss
Default sampling rate
This is set to ~15 Hz
Mobile Devices SDK
The Mobile Devices SDK provides APIs that enable an application to make a single reading of the magne-
tometer output, or to register a callback for repeated readings.
Recalibration
DeviceOrientationCalibrate launches the calibration process through the GUI. Calibration must be done
manually by the device operator.
22.4.1 Getting Started with the Magnetometer
For articles on Ingenuity Working that will guide you in getting started with the magnetometer see
the following:
community.psion.com/tags/compass/noteDG
Note: Magnetometer readings should not be taken while the built-in laser scanner is in use. The laser
scanner generates a strong local magnetic field.
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