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Chapter
5
Internal Sensors
Light Sensor
The Senquip ORB is equipped with an internal light sensor that is used to activate the ORB setup func-
tions when the lid is opened and to detect tamper attempts. The light sensor is sampled on a regular
basis and does not have an associated measurement interval.
An alert can be generated when the ORB detects light, meaning that the lid has been opened.
Note A tamper alert, if enabled will be triggered by a tamper attempt or an authorised entry to change
settings.
A full list of light sensor settings is given in the table at the end of the chapter.
5.1 Accelerometer
The Senquip ORB has an integrated 3-axis accelerometer. The accelerometer allows for angle measure-
ment, movement detection, harsh-usage monitoring and utilisation calculation. To provide more accurate
measurement for pitch, roll and angle measurement, each time the accelerometer is measured, 10 samples
will be taken at 1 msec intervals and the average will be returned as the measured value. Pitch, roll and
angle will be calculated from the average acceleration.
Raw accelerometer data in the X (through the lid), Y (left to right across the ORB lid) and Z (from the
hinge down to the cable gland) are available and are delivered in G’s. These values can be useful, for
instance where an incident is being re-created from force data.
Note Incident recreation using force data requires high speed sampling. Please contact Senquip to
discuss your application.
When looking at the front cover, positive pitch is described as the top of the ORB tilting towards the
observer. In the same scenario, negative pitch is described as the top of the ORB cover moving away from
the observer.
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