the “SONAR BOAT” as an internet server and it is therefore possible to operate it directly anywhere on the world using a tablet or smartphone. Any tours can be planned and transferred to the boat using the app provided. All measurement data are stored centrally and can be visualized in A special software. The measurement results are therefore immediately available worldwide.
Some improvements have also been made technically. The power supply system has been revised and centralized (2-3 hours driving time depending on the current) and the “ComingHome reserve battery” was strengthened and now allows “coming home” over long distances, the GPS system is only installed as a multifrequency device (better and faster position by correction service, eg Sapos) and is better separated from the radio services in terms of radiation and connected to the CPU via cable.
Interference is largely prevented and a cm-accurate signal can be received almost anywhere where there is an internet connection.
Of course, the GPS system can still be used independently as a separate measurement system. Basically, we only deliver the boat with detailed instruction in technology and also in tour planning with special software.
Dates for the briefing or demo are individually coordinated.
Bathymetric Survey in Basra
Technical details:
Boat hull
Precision measuring boat also suitable for large waves consisting of: Boat hull 93 x 63 x 34 cm, ABS catamaran construction
2 powerful motors with up to 11.000 rpm and suitable regulators suitable for rough water operation, 2 × 70 mm speed screws with protective housing and slide.
Power Supply
The power supply consists of 2 units of LiPos 4S 14,8 236.8 Wh 16000 mAh and a “Coming Home” emergency power supply of 10.000 mAH and a coordinated charging unit for 2 batteries. Please always observe the safety and loading regulations
RC remote controller (remote control)
We are currently using a high-quality Graupner RC for manual control of the
robot. In addition to right / left and forward / backward, the coming be triggered or switched to the emergency power supply
BootsCPU
the BootsCPU consists of an adapted Rasberry version in connection with an LTE stick for access to the Internet. The CPU is radiation-technically separated from the GPS in order not to emit interference radiation.
Sonar
The built-in sonar is permanently integrated depending on the system (single or multi-frequency) and directly connected to the CPU. A highly accurate Airmar – EchoRange ™ Single Frequency Smart Transducer is currently being developed. The first single-frequency product works at 200 kHz.
– EchoRange ™ Dual Frequency Smart Transducer (has an internal I2C interface to a second (lower frequency) Smart Transducer). The first dual frequency product will operate at 200 kHz and 30 kHz. The 200 kHz Smart Transducer is called the master, the 30 kHz slave. The single-frequency product has two separate communication interfaces: a bidirectional interface, which corresponds to the NMEA 0183 protocol with RS422, and a pure transmission interface with a proprietary protocol with RS485. The working accuracy is approx. +/- 2cm depending on the ambient conditions.
GNSS measuring unit (GPS)
As a measuring unit for position measurement, we use the modern multi- frequency receiver from EMLID RS2, which is connected directly to the BootsCPU. Technical data here.
Navigation system
A Pixhawk 2.x is used as the navigation system which works with t e Mavlink
protocol and is directly connected to the BoardCPU. The navigation accuracy is
1-3 m depending on the quality of the GPS signal (depending on the environment and satellite position.
Navigator
With the Navigator it is possible to plan a tour exactly on the BoardCPU in the browser and to transfer it to the navigation computer. When planning, you have
the option of loading (Connecting) various background maps, for example, your own aerial photo created shortly before. This enables the most accurate route
planning to be created and carried out even in inadequately record d waters.
Pilot
This app (website) controls the entire boat infrastructure and starts or ends the measurement process. Via the Snyc ”function, the data is immediately transferred (onthefly) to the GIS.
