Operator's Manual

Page 21
Version 1.4
Copyright © 2019 RSAE Labs
08-Apr -2019
7. GS-6C Sensors
The GS-6C includes several sensors which provide situational awareness of the container state. The
values of these sensors are reported to the DMC based on a schedule and when an unexpected event
occurs.
The GS-6C uses data from these sensors along with the GPS/GNSS, cellular, and satellite radio outputs
to provide an integrated view of the container. This integrated view allows the GS-6C to perform several
actions autonomously.
7.1. Door Sensors
The GS-6C uses a dual IR/Proximity and Ambient Light Sensor (ALS) to determine if a container door is
opened or closed. The device automatically calibrates itself to the container and using our Adaptive
Container Management (ACM) software reliably differentiates between door chatter and a true door
opening. Upon sensing a door state change (opening or closing), the GS-6C immediately reports this to
the DMC along with a timestamp and location report.
7.2. Internal Cargo Light Sensor
In addition to the ALS, the GS-6C includes a cargo light sensor. Along with the ALS, the GS-6C is able
to differentiate between a door opening and an intrusion into the container. As such, the GS-6C provides
a notification if the container has been breached.
7.3. Accelerometer
The GS-6C includes an accelerometer that is used to determine whether the container is at rest or
moving. It can be configured to detect and record tilt events, shock events, and drop events.
The GS-6C does not naturally remain in an upright position as it is difficult to balance on the long end of
the battery pack. The accelerometer measures the orientation. Together with the door states, the
accelerometer is used to automatically determine when the GS-6C is mounted or unmounted.
When properly mounted on a container, the tilt of the GS-6C can be used to determine the tilt of the
container. This can be configured to generate an event identifying where and when a container has been
tilted enough to cause cargo to shift.
The GS-6C free-fall detector can be used to determine if the GS-6C has been dropped. Along with other
sensors, this helps identify when and where a container may have been damaged.
7.4. Temperature and Humidity
The GS-6C includes a precision temperature and humidity sensor. The GS-6C can be configured with
upper and lower limits to detect and report abnormal temperature and humidity inside the container. The
device implements hysteresis around these limits to reduce the number of reports or “chattering”.