Getting accurate positioning output from a dredge requires precise calibration of the sensor-to-machine geometry. ClamVision provides a structured calibration workflow that guides the operator through every measurement required.
What needs to be calibrated
- GPS antenna offsets: horizontal and vertical distance from each antenna to the machine reference point
- Boom geometry: length of boom sections and cable/sheave geometry to compute tip position from encoder readings
- Excavator link lengths: boom, stick, and bucket dimensions for kinematic arm computation
- Inclinometer alignment: orientation of inclinometer axes relative to machine axes
- Heading alignment: offset between compass heading and the true bearing of the machine’s centerline
- Bucket center-of-dig: the specific point on the bucket that contacts the bottom, accounting for bucket shape and angle
Calibration verification
ClamVision provides graphical tools to verify calibration results. A calibration check compares computed bucket position against a known survey point or cross-check measurement, showing the residual error. Calibration parameters are stored in the project file and can be copied to new projects on the same vessel.
Sensor simulator
ClamVision includes a dedicated SensorSimulator application that generates realistic synthetic sensor data, GPS positions, encoder readings, inclinometer outputs, CAN bus messages, without requiring real hardware. The simulator is used to test and verify calibration setups in the office before mobilization, reducing commissioning time on site.