August 2020 – TD 316 OPERATING MANUAL – Motus Wave Sensor 5729
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CHAPTER 1
Short description and specifications of the Motus Wave Sensor
1.1
Description
Motus Wave sensor is a directional sensor module for use on surface buoys. The sensor is tested and approved for use
with YSI EMM 2.0 and Motus DB1750 buoys. The sensor can either be connected to an Aanderaa Datalogger using the
AiCaP protocol or to any third party logger using RS-232. The sensor is using a build-in solid state 9-axis
accelerometer/gyro/magnetometer to measure the movement of the buoy. These measurements are then processed
inside the sensor and a wide range of parameters as well as wave spectrum are presented directly from the sensor in
real-time. For maximum flexibility the sensor can handle off- center mounting and due to the 30 meter depth rating it can
also be installed outside the buoy body. The senor is equipped with an internal compass in order to reference directional
data to geographical or magnetic north. If the magnetic field is disturbed by the buoy structure or payload an optional
external compass may be used. In order for the wave sensor to fully capture the required movements of the buoy a
more flexible mooring is required. To obtain the required flexibility one section of the mooring should consist of a rubber
cord. Guidelines for mooring design are available in
1.2
Sensor Dimension
Figure 1-1: Sensor Dimension side view Figure 1-2: Sensor Dimension top view
