Project: Designing an On Screen Display for QR x350 Pro and e-Eyes Plane with iLook

OSD is a Virtual Cockpit HUD heads-up display, a transparent display that presents data without requiring users to look away from their usual viewpoints.  Displays a set of instruments to assist in flight.  We have somes but putting this out to gather additional input to design/integrate one to be used for our X350 Pro and GPS Plane, looking for input before we venture into it.  Besides the OSD, other things to consider is how to integrate with iLook which has a built-in video transmitter, as well as making swappable for SAR missions.

[OSD Comparison Chart]

 


ref: mininosd extra design

 

Sample List to consider (using MinimOSD as a reference point). High priority being a 1 on phase one, 2 medium phase 2 and unknown being a low priority.

Battery A (VA) - 1
This panel shows your battery voltage. To read correct values you have to set it in MP.
This panel has a warning assigned

Landing Aid (small horizontal line on the right) - 1
Ground level indicator. If you descent lower then home (like in a valley) the "-" sign would go above horizon line.
 
Battery Percent - 1
This panel indicates the charge level of your battery. It shows your charge level in percent.
You should set your battery capacity in Mission Planner.
Requirement: To be able to use this panel you need a current sensor.

Center or Horizon
Center is probably the simplest panel we have. It is a kind of crosshair that usually placed in the middle of the screen.   In newer versions, an artificial horizon replaces the center.  A landing aid was added (see Landing Aid).

Current (CA) - 1
This panel indicates the current draw of your system, in the present moment.
Requirement
To be able to use this panel you need a current sensor connected to the Flight Controller.

Airspeed (AS) for Fixed Wings - 2
This panel indicates your airspeed, which is the speed relative to the air around your plane (fixed wing). It is measured using a pitot tube and a differential pressure sensor.  Requirement: To be able to use this panel you need the pitot tube and the differential pressure sensor. If not it defaults to the ground speed.

Ground Speed (GS) - 1
This panel displays the ground speed as calculated by the GPS, similar to the speed provided by an automobile GPS.

Efficiency - 2
Efficiency panel is a 3 in 1 panel.
If throttle is higher than 2%

It shows your planes actual efficiency. It indicates how many mah is needed to fly one km or mile.
If Throttle is below 2% and your plane is descending

It indicates the distance you can glide from your actual hight with your actual heading.k
If Throttle is below 2% and your plane is climbing

It shows an up arrow indicating that you are probably in a thermic.

GPS Lock - 1
This panel shows a symbol that has two states.
1./ Lock opened: Means No GPS lock (does not have valid GPS coordinates)
2./ Lock closed: Means GPS is locked (has valid GPS coordinates and altitude)
This panel has a warning assigned
If warnings are enabled, and there is no GPS fix than a warning message is shown.

GPS Coord (LAT LON) - 1
This panel shows the exact GPS coordinates.
It is useful when you want to know where you were at particular moment.
(Relaying GPS coordinates to ground searches or finding your lost craft if you record your live video)

Heading Rose - 1
This panel is a rough Compass.
It shows real north. (Not magnetic!)

Heading - 2
This panel is an exact Compass showing values in degree.
It shows real north. (Not magnetic!)

Throttle (THR) - 1
This panel indicates the amount of throttle you set by your transmitter, or throttle Flight Controller sets in auto modes in percent.

Flight Mode (MOD) - 1
This panel indicates the current selected flight mode.

Horizon - 1
This panel is a artificial horizon. It indicates the horizon, gets shorter when you do a vertical dive.

Home Direction - 1
This panel indicates direction to home, relative to your plane.
You need a magnetometer to make this panel work precise.
It still works well with only GPS, but when there is strong wind, than it can show a bit different home direction. (Usually it is correct still.)

Home Distance - 1
This panel indicates your plane distance from home in meters if you set metric system for units of measurement, and feet if imperial.

Home Altitude (HA) - 1
This panel indicates your height above your home position in meters if you set metric system for units of measurement, and feet if imperial.  Some people prefer imperial as it is more refine by feet versus one meter when you are landing.

mAh and Efficiency - 2
mAh is based on voltage, used current and time-lapse between readings.  Efficiency panel uses the battery percentage reported by APM.  Knowing the time-lapse between first battery % reading and current battery % reading, we can infer how many time will take to battery % goes to 0%. For example, if you consumed 10% battery in 1 minute then you will have 9 more minutes of flight.

Max VS (m/min) / 10 (Extra Warning)
As copters do not have stall speed. warning is  "vertical speed warning" shown as "High VSpeed!".  It is set in the CT Tool as 10th of vertical speed units. So, if you want to set it to trigger the warning above 100 m/min you should set 10 in the textbox. In terms of feet, say 18 units (about 3 feet per second).  Take in account that it can have a considerable lag since we "smooth" the readings because APM reported vertical speed is very jumpy.

Pitch ↕ - 2
This panel shows the pitch of your plane in degree.

Roll - 2
This panel shows your planes roll in degree.
If your plane leans to the right is positive value, to the left is negative.

RSSI - 1
RSSI panel indicates your radio signal strength (Received signal strength indication). It shows it in percent.
Requirements::
You need a receiver capable of sending analog RSSI information.

Real Heading
The "Real Heading" is the difference between "nose heading" and the "course over ground" heading. So, if your quad is pointing east and it is moving south-east, it will show 45 with the arrow pointing up-right.

Summary - 2
A summary of your flight details is shown at the end of each flight.  Rotating 10 seconds in summary and 10 seconds of the last panel display.  Flight data is reset when throttle next reaches 15%.

Stall Speed (Fixed Wing Warning) - 2
For planes, if you have airspeed sensor, it will refer to your airspeed. If you are not using airspeed sensor, it will refer to your ground speed. For example if you set it at 5 km/h Stall Speed, if your speed is less than 4 km/h, it will not show up as a warning. If you have set metric, than it will be in Km/h. If you have set imperial, than it will be in mph.

Temperature - 2
Temperature reported by barometer, measuring the surrounding of the flight controller, not exactly the weather temperature. If you have an enclosure, you will get a good sense of the heat generated

Time - 1
Time panel shows the time since the OSD  booted up.

Visible Sats - 1
This panel shows the number of satellites your GPS sees at the moment,

WP Direction - 2
Waypoint direction panel indicates the direction to the next waypoint, relative to your plane.
You need a magnetometer to make this panel work more precisely.
It still works well with only GPS, but when there is strong wind, than it can show a bit different waypoint direction (usually it is a good approximation).

WP Distance - 2
Waypoint distance panel indicates your plane distance from the next waypoint, in meters if you set metric system for units of measurement, and feet if imperial.

Vertical Speed (VS) or Climb Rate (CR) - 2
This panel uses the barometer. It indicates how fast your plane gains or looses height in m/s if you set metric system for units of measurement, and ft/s if imperial.

Velocity (VA) - 2
This panel indicates your ground speed. This is your speed relative to ground determined by GPS.

Wind Speed (WS) Fixed Wings - 2
Wind speed shows horizontal wind direction and speed (on the top), and Vertical wind speed (on the buttom).

Warnings - 1
Warning messages are blinking signs to let you know there is something wrong, or dangerous is happening.  It should also automatically return to Panel 1, your main panel when a warning is detected.  Recent versions did not return to panel 1.

To help you more, in an emergency situation warnings will bring you back to your home screen automatically, so you can focus on flying.

Available warnings:
- Loss GPS fix - 1
- Stall - 2
- Overspeed - 1
- Battery voltt - 1
- Battery Percent - 1
- RSSI - 2

You can configure warning levels for Stall in CT and OSD menu, Overspeed in CT and OSD menu, Battery Volt in CT and OSD menu, RSSI in CT, and Battery Percent in CT.


Conducting vertical speed warning system test with minimosd

Notes: Video must be recorded at ground station for recovery purposes.  Basically a DVR SD Card integration if using a Devo 7+
 

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