- Installing the multibeam
- How to use the multibeam
- Example videos
- User manual
The Oculus M-Series offers single and dual-frequency models, unparalleled image quality in a compact, rugged form factor, and a depth rating of 500 m. The Oculus M750d multibeam sonar from Blueprint Subsea is an excellent sensor helping the operator navigate, identify objects and increase situational awareness under the surface.
The sensor is handy when diving in murky waters, for search and rescue missions, or for jobs where you cannot rely on a camera solely to locate your target of interest.
2. How to install
All guest ports can be used, although we recommend using GP1 as this will make the cable routing easier.
3. How to use the multibeam
Make sure to switch on the surface unit before powering on the drone, which powers the multibeam.
3.1 Powering on the system
Powering the surface unit before the drone when using the M750d multibeam is important. Otherwise, the multibeam might not get an IP address, and the software won't be able to discover it. Once the surface unit and drone are fully powered on, connect your Blueye app, then connect a Windows computer or tablet running the Oculus ViewPoint software to the Blueye WiFi.
If you accidentally power on the drone first, reboot the drone, and the multibeam should appear in the ViewPoint software.
3.2 Connect to the ViewPoint software
Using the Oculus M750d with a Blueye X3 is very simple. The only requirements are:
- A Windows computer connected to the Surface Unit Wi-Fi.
- Download the latest ViewPoint software from Blueprint.
Once connected to the Wi-Fi and launching the program, click on the top left icon, as shown in the picture below, then press the small window that appears with the multibeam info.
Once connected, press the settings icon (4) in the bottom left corner and make sure the bandwidth limit is set to 10Mb/s.
3.3 Using the sonar
The sonar is also integrated with the Blueye system enabling the operator to tilt the vertical sonar angle directly from the Blueye app. You can tilt the multibeam with the volume buttons while in the app. While diving with the app you will also be able to see a sonar tilt icon in the top status bar, showing you the current angle of the multibeam.
A good rule of thumb when searching the seabed is to use a 10-15 degrees downward facing angle and maintain an altitude above the seabed of 10% of the selected range.
Frequency and range
Use the low-frequency mode when searching for a target, and once located, switch over to high-frequency mode to get a more detailed view of the target. Remember that high-frequency mode will reduce the viewing angle from 130 to 80 degrees.
The range affects the update rate of the image. The longer the range, the slower the update rate, and increased battery usage, so use it wisely.
Gain control works like a volume controller. If details are hard to see, the gain increases the "volume" of the signal, and details will be clearer. However, this can also saturate the image, making some details disappear.
As the M750d is a heavy and powerful payload, the drone will automatically limit the maximum boost to 90% to maintain stability. In terms of power, the maximum boost will slowly decrease as the battery percentage goes down, and when the drone battery gets under 20%, the boost will be disabled to maintain the sonar's power. If the sonar stops working during a dive, it is most likely due to the low drone battery voltage.
The multibeam is not discovered by the ViewPoint software
The multibeam gets an automatically assigned IP address. If the drone were started long before the surface unit, the multibeam would not get a valid IP address. Try to restart the drone while keeping the surface unit powered. Remember to always turn on your surface unit before the multibeam.
The multibeam stopped working during a dive
If the multibeam stops working during a dive, it is likely due to the drone battery being too low. If the drone has external lights or other power-hungry accessories, it is recommended not to run them at 100% brightness. To re-establish the connection, the drone needs to be restarted.
The drone won't boost
When a M750d is connected, the boost function is limited during the dive to prevent voltage drops and maintain the drone's stability in the water. Below 20% battery, the boosting functionality is disabled.
5. Example videos
The following videos are demonstrations of the 720im attached to a Blueye X3 drone.
6. User manual