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Attitude instrument

 
 
Attitude instrument
 

Operation

 
After clicking the "Start" button the simulation will start, and sentences will be sent to the selected output port of the PC, until the "Stop" button is pressed.
 
For each dimension (Roll, Pitch and Heave) an individul simulation option is available by checking the apprpropriate check box.
When not in simulation mode, each parameter (Roll, Pitch, Heave) can be set individually, also while running.
 
In simulation mode, the sample time for Roll, Pitch and Heave values is 1/100 second. The algorithm used to calculate the angle in degrees (resp. meters) is
 
((2 * MaxAngle)/Time)
 
With the high sensor update rate it is possible to achieve a realistic output when setting the Transmit Interval to a low value, e.g. 0.1 second or even lower. Drawback is that you may need fast serial ports or use UDP ports to avoid buffer overruns.
 
All sentences are shown in the I/O Port Monitor as they are output. When logging is ON (toolbar option), the sentences will also be written to the user selected log file.
 
Clicking the "Stop" button will suspend the operation, until "Start" is clicked again.
 
When the Transmit Interval is set to 0.0 the sentences are output as "single shot" each time you click the "Start" button.
 
Clicking the little X top-right will exit the object and save optionally all current values, so that next time the instrument is used it can continue where it stopped. Note: saving is an optional setting in the General Settings.
 
NOTE: There is no standard defined in NMEA 0183 for Attitude (Roll, Pitch and Heave). Therefore Sailsoft has choosen to try to support the proprietary sentences of selected manufacturers. The sentence formats supported in NemaStudio for the Attitude instrument are based on information provided by customers and may be incomplete or even wrong. Any suggestions for improvement are very welcome.
 
A short description of each field follows.
 
 
 
 
1

Tag 

1. Tag
Assign any name (optional) to this instrument
22. Link Heading
Check this box if a Heading Instrument should be linked.
There should be at least one Heading instrument active.
 
3

Max angle/max meters       

3. Max angle/max meters
Here you enter the maximum angle (in ONE direction) for Roll, Pitch and Heave (meters).
E.g. if you enter the max angle of roll over one board as 30 degrees, from board to board this results in 60 degrees.
 
4

Simulate mode checkboxes

4. Simulate mode checkboxes
Check this box if you want to go into simulation mode for the specific function.
 
5

Native option

5. Native option
To select the native manufacturer sentence identifier
6

Manufacturer

6. Manufacturer
Select the attitude instrument manufacturer.
Different manufcturers generate different output.
 
7

Time

7. Time
For Roll: the time in seconds it takes to roll from board to board
For Pich: the time in seconds it takes to pitch from bow to stern
Fore Heave: the time in seconds from the lowest altitude to the highest altitude
 
8

Proprietary Sentence ID

8. Proprietary Sentence ID
Enter a proprietary sentence identifier to replace the native identifier
 
9

Current Roll Angle

9. Current Roll Angle
This value goes into the output sentence.
In simulation mode this value is automatically updated every 1/100 second.
 
10

Current Pitch Angle

10. Current Pitch Angle
This value goes into the output sentence.
In simulation mode this value is automatically updated every 1/100 second.
 
11

Current Heave in meters

11. Current Heave in meters
This value goes into the output sentence.
In simulation mode this value is automatically updated every 1/100 second.
 
 
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