ARBONET ARBONET “A poor man’s space program” Primarily funded and spear-headed by: Doug Loughmiller – W5BL Michael Willett – K5NOT With support from several enthusiastic.
Download ReportTranscript ARBONET ARBONET “A poor man’s space program” Primarily funded and spear-headed by: Doug Loughmiller – W5BL Michael Willett – K5NOT With support from several enthusiastic.
Slide 1
ARBONET
Slide 2
ARBONET
“A poor man’s space program”
Primarily funded and spear-headed by:
Doug Loughmiller – W5BL
Michael Willett – K5NOT
With support from several enthusiastic individuals
and clubs
Slide 3
ARBONET
Local Clubs Involved with ARBONET:
•
•
•
•
•
•
North Texas Balloon Project (mentors / chasers)
Red River Valley Amateur Radio Club (NE TX)
Fannin County Amateur Radio Club (NE TX)
Lockheed Amateur Radio Club – Ft. Worth
Richardson Wireless Klub (guest payloads)
Irving Amateur Radio Club
Slide 4
Adventures:
GPSL-2009
Aka: Which way did it go?
Slide 5
ARBONET
GPSL 2009
Arrived with payloads ready and willing to go flying, but….
Became “enlightened” by Bill Brown… “ The Copernicus
GPS has issues and settings you need to address…”
We did not drive all the way up here to sit on the sidelines….
So we flew anyway!
We thought we would at least have Lat / Long… And…. After
the radio batteries were depleted…..
Slide 6
ARBONET
Our payload was found a week later in grazing land by
ranchers in Redland, KS.
After reward money and postage, the payload came back to
Texas!
During the recovery, Doug and I never laughed so hard,
making fun of the female voice beacon who talked a lot and
yet said so little!
Slide 7
ARBONET
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
29,616 ft
Last Valid GPS
Data Point
195
165
135
115
85
55
35
14
Alitutude (m)
Temperature
Pressure
Max altitude
obtained
estimated by Bill
Brown WB8ELK
as about 110,000
feet
Slide 8
ARBONET
GPSL 2009 Flight
Configuration
Balloon
Manifold
Pressure Sensor Feed
Electronics
Valve (closed for this flight)
Parachute
(Intended to be closed for flight)
Slide 9
6 Minute Video
ARBONET flight at GPSL 2009
Slide 10
Slide 11
Interesting Data:
Envelope Pressure
Slide 12
ARBONET
P = F/A
Where P = Pressure
Where F = Force
Where A = Area
• If P is nearly static, F /A are not changing or equal in change
• If P increases, F is increasing or A is decreasing
• If P decreases, F is decreasing or A is increasing
Slide 13
ARBONET
GPSL 2009 Flight
Configuration
Balloon
Manifold
Pressure Sensor Feed
Electronics
Valve (closed for this flight)
Parachute
(Intended to be closed for flight)
Slide 14
ARBONET
Pressure Sensors:
Measured Pressure =
Ambient Pressure
Diaphragm
Ambient Air
More
Pressure
Diaphragm
Ambient Air
Slide 15
ARBONET
P=F/A
Rs
Balloon
Balloon
Diaphragm
Ambient Air
Diaphragm
Ambient Air
Slide 16
ARBONET
90
80
Internal Temperature
Of Payload
70
60
Pressure
50
Pressure
Temperature
40
30
20
10
95
85
75
65
55
50
45
35
25
10
5
11
5
12
0
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
19
7
Bu
rs
t
-10
15
14
0
Slide 17
ARBONET
• We tend to think balloons behave in a linear fashion
since the ascent is nearly linear. Thus a balloon that is
getting bigger should have equal or more pressure…
• We found the behavior is not linear, but a balance of
P=F/A that was not expected
• Other factors also contribute – He impurities, point of
measurement, etc.
• The Latex stretching is not linear, and the “mechanical
maximum” (ability to contain the gas within) has a limit
that is recognizable just before burst!
Slide 18
ARBONET
50
45
This area may actually become a
vacuum per similar results from
U of MN students
40
35
30
25
20
ARBONET
Envelope Pressure
relative to ambient
(not calibrated )
15
10
5
-5
19
7
Bu
rs
t
19
5
18
5
17
5
16
5
15
5
14
5
13
5
12
5
12
0
11
5
10
5
95
85
75
65
55
50
45
35
25
15
14
0
Slide 19
ARBONET
50
45
To modulate the optimum
envelope pressure, we need to
detect and remain in this region
40
35
30
25
20
Envelope Pressure
relative to ambient
(not calibrated )
15
10
5
-5
19
7
Bu
rs
t
19
5
18
5
17
5
16
5
15
5
14
5
13
5
12
5
12
0
11
5
10
5
95
85
75
65
55
50
45
35
25
15
14
0
Slide 20
Possible Flight Profile
Phase 4
Ascent
ALTITUDE
80K-100K ft
Phase 5
Hover
Phase 6
Deflation and
Return via
Balloon
Phase 3
Sense return of
Positive pressure
Trend and Modulate
Pressure
Phase 6
Return to Hover
(Dump Ballast)
Phase 2
Ascent
Phase 1
Launch
RDF Tone
TIME
Phase 7
Recovery
Slide 21
ARBONET
How envelope modulation may be used:
• Hang a balloon for longer-term, high-altitude
experiments, re-call it when desired
• A repeater in the sky for long periods of time
• Controlled descents and with ballast, possible
controlled landings by chase team
• Gain higher altitudes, even though the ft/min is
constantly decreasing after maximum expansion, you
are still climbing for many minutes!
Note: Likely venting issue if in the zero pressure region!
Slide 22
ARBONET
Project 1:
New Voice Beacon
Payload
Slide 23
ARBONET
The new voice beacon payload:
•
•
•
•
•
•
•
•
•
Same lost blonde-sounding women’s voice we all love.
Inventek GPS with Sarantel antenna
0.3 PSI rated pressure sensor (higher precision)
Embedded repeater via 70cm and 2m radios
Built in USB for log retrieval and troubleshooting
DS1822 Digital thermometer Internal and External
Sensiron Thermometer and humidity measurement device
2Mb to 4Mb logging memory capacity
Separate, controllable power busses for almost all
electronics to reduce power consumption
• All on a 3.8 x 2.5 double-sided board
Slide 24
ARBONET
ARBONET VOICE BEACON Design Team :
• Patrick Whitfill, Firmware Guru / Operational
Aspects
• Michael Willett, K5NOT, Systems design,
Hardware design and JOAT
Slide 25
ARBONET
The new voice beacon main board:
Slide 26
ARBONET
The new voice beacon main board:
Voice Synthesizer
(Backside)
Analog In
and Servos
Pgm Hdr
USB Hdr
70cm
Antenna
70 cm radio
(backside)
Pressure Sensor
CPU and
memory
USB Chip
(backside)
Power In
GPS
Each section uses Power Control
Open Tracker SMT
2m radio
(backside)
2m
Antenna
Slide 27
ARBONET
The new voice beacon main board:
Slide 28
ARBONET
Slide 29
ARBONET
Project 2:
Slow Scan TV Module
Slide 30
ARBONET
A look at the OE1RIB
Embedded Mobile SSTV
for use in High Altitude
Balloon Flights
Doug Loughmiller, W5BL – ARBONET
GPSL 2010 Hutchinson, KS
July 23rd, 2010
Slide 31
ARBONET
Design Credit
• The concept, design and implementation of the Mobile
Embedded SSTV System is 100% the result of the efforts
of Richard Prinz, OE1RIB who has graciously made his
design materials available to W5BL for use on upcoming
ARBONET flights.
• Doug’s efforts have simply been to identify Richard’s
work and to promote his design as a viable solution for a
low power, low cost, portable SSTV solution suitable for
use as a payload on High Altitude Balloon Flights..
Slide 32
ARBONET
Image Options for High Altitude Balloon Flights
• ATV
– Platform Stabilization, limited ground stations
• Digital Photography / Digital Video
– Excellent Images, but can only be viewed post flight
• SSTV
– Excellent Image quality, downlink in near real-time,
easy ground station solution with receiver, lap-top and
shareware
Slide 33
ARBONET
ARBONET
SSTV Activity
Slide 34
ARBONET
What We Really Want To See!
Slide 35
Commercial, Portable Off-the-Shelf SSTV Options
ARBONET
are Limited
Slide 36
ARBONET
A Novel Home-Brew Solution
• Original Article
Appeared in “Funkamateur” 8/2007
• OE1RIB Web Site:
http://www.min.at/prinz/oe1rib/SSTV/#Purpose
Slide 37
Features of The Universal Mobile Embedded SSTV
ARBONET
System
• Supports Black and White or Color Images Using
Martin 1 with either 320 x 240 or 320 x 256 pixels
• Supports SSTV VIS code, Optional CW station ID
• Multiple transmissions of a captured image or
single transmission of multiple images
• Battery backed Real-time clock for time and date
display on image or via CW
Slide 38
ARBONET
• Built-in temperature sensor in image display or
via CW
• In-circuit Programmable
• User defined Font Editor For Status Text
Messages
• Configurable via RS-232 Port using HyperTermlike serial programs
• Small Form Factor
• Light Weight
Slide 39
ARBONET
System Image Using Martin1
Slide 40
ARBONET
Circuit Details
•
•
•
•
•
•
Microprocessor = Microchip PIC18F458
Video Buffer= AverLogic AL422B
Real Time Clock= Maxim DS1307
Temperature Sensor= Microchip TC74
Camera= Sander/ ETC CAM-C3188A
Low Power System operates at 100 mA during
image capture and transmission , 90 mA at idle.
Slide 41
ARBONET
Construction
• Almost all parts are readily available through
catalog distributors (Mouser, Digi-key etc.)
– Exceptions: Averlogic Frame Buffer, Maxim
MAX1818 and Sanders Camera
• Boards can be obtained through ExpressPCB
• Software downloadable from the Web site
• Some surface mount components
Slide 42
ARBONET
Conclusion
• Ideal Solution for BalloonSat Operations
• Thanks to Richard, OE1RIB for Sharing his
design
• Stay Tuned for Images from Upcoming
ARBONET flights.
• www.arbonet.net
Slide 43
ARBONET
ARBONET
Slide 2
ARBONET
“A poor man’s space program”
Primarily funded and spear-headed by:
Doug Loughmiller – W5BL
Michael Willett – K5NOT
With support from several enthusiastic individuals
and clubs
Slide 3
ARBONET
Local Clubs Involved with ARBONET:
•
•
•
•
•
•
North Texas Balloon Project (mentors / chasers)
Red River Valley Amateur Radio Club (NE TX)
Fannin County Amateur Radio Club (NE TX)
Lockheed Amateur Radio Club – Ft. Worth
Richardson Wireless Klub (guest payloads)
Irving Amateur Radio Club
Slide 4
Adventures:
GPSL-2009
Aka: Which way did it go?
Slide 5
ARBONET
GPSL 2009
Arrived with payloads ready and willing to go flying, but….
Became “enlightened” by Bill Brown… “ The Copernicus
GPS has issues and settings you need to address…”
We did not drive all the way up here to sit on the sidelines….
So we flew anyway!
We thought we would at least have Lat / Long… And…. After
the radio batteries were depleted…..
Slide 6
ARBONET
Our payload was found a week later in grazing land by
ranchers in Redland, KS.
After reward money and postage, the payload came back to
Texas!
During the recovery, Doug and I never laughed so hard,
making fun of the female voice beacon who talked a lot and
yet said so little!
Slide 7
ARBONET
10000
9000
8000
7000
6000
5000
4000
3000
2000
1000
0
29,616 ft
Last Valid GPS
Data Point
195
165
135
115
85
55
35
14
Alitutude (m)
Temperature
Pressure
Max altitude
obtained
estimated by Bill
Brown WB8ELK
as about 110,000
feet
Slide 8
ARBONET
GPSL 2009 Flight
Configuration
Balloon
Manifold
Pressure Sensor Feed
Electronics
Valve (closed for this flight)
Parachute
(Intended to be closed for flight)
Slide 9
6 Minute Video
ARBONET flight at GPSL 2009
Slide 10
Slide 11
Interesting Data:
Envelope Pressure
Slide 12
ARBONET
P = F/A
Where P = Pressure
Where F = Force
Where A = Area
• If P is nearly static, F /A are not changing or equal in change
• If P increases, F is increasing or A is decreasing
• If P decreases, F is decreasing or A is increasing
Slide 13
ARBONET
GPSL 2009 Flight
Configuration
Balloon
Manifold
Pressure Sensor Feed
Electronics
Valve (closed for this flight)
Parachute
(Intended to be closed for flight)
Slide 14
ARBONET
Pressure Sensors:
Measured Pressure =
Ambient Pressure
Diaphragm
Ambient Air
More
Pressure
Diaphragm
Ambient Air
Slide 15
ARBONET
P=F/A
Rs
Balloon
Balloon
Diaphragm
Ambient Air
Diaphragm
Ambient Air
Slide 16
ARBONET
90
80
Internal Temperature
Of Payload
70
60
Pressure
50
Pressure
Temperature
40
30
20
10
95
85
75
65
55
50
45
35
25
10
5
11
5
12
0
12
5
13
5
14
5
15
5
16
5
17
5
18
5
19
5
19
7
Bu
rs
t
-10
15
14
0
Slide 17
ARBONET
• We tend to think balloons behave in a linear fashion
since the ascent is nearly linear. Thus a balloon that is
getting bigger should have equal or more pressure…
• We found the behavior is not linear, but a balance of
P=F/A that was not expected
• Other factors also contribute – He impurities, point of
measurement, etc.
• The Latex stretching is not linear, and the “mechanical
maximum” (ability to contain the gas within) has a limit
that is recognizable just before burst!
Slide 18
ARBONET
50
45
This area may actually become a
vacuum per similar results from
U of MN students
40
35
30
25
20
ARBONET
Envelope Pressure
relative to ambient
(not calibrated )
15
10
5
-5
19
7
Bu
rs
t
19
5
18
5
17
5
16
5
15
5
14
5
13
5
12
5
12
0
11
5
10
5
95
85
75
65
55
50
45
35
25
15
14
0
Slide 19
ARBONET
50
45
To modulate the optimum
envelope pressure, we need to
detect and remain in this region
40
35
30
25
20
Envelope Pressure
relative to ambient
(not calibrated )
15
10
5
-5
19
7
Bu
rs
t
19
5
18
5
17
5
16
5
15
5
14
5
13
5
12
5
12
0
11
5
10
5
95
85
75
65
55
50
45
35
25
15
14
0
Slide 20
Possible Flight Profile
Phase 4
Ascent
ALTITUDE
80K-100K ft
Phase 5
Hover
Phase 6
Deflation and
Return via
Balloon
Phase 3
Sense return of
Positive pressure
Trend and Modulate
Pressure
Phase 6
Return to Hover
(Dump Ballast)
Phase 2
Ascent
Phase 1
Launch
RDF Tone
TIME
Phase 7
Recovery
Slide 21
ARBONET
How envelope modulation may be used:
• Hang a balloon for longer-term, high-altitude
experiments, re-call it when desired
• A repeater in the sky for long periods of time
• Controlled descents and with ballast, possible
controlled landings by chase team
• Gain higher altitudes, even though the ft/min is
constantly decreasing after maximum expansion, you
are still climbing for many minutes!
Note: Likely venting issue if in the zero pressure region!
Slide 22
ARBONET
Project 1:
New Voice Beacon
Payload
Slide 23
ARBONET
The new voice beacon payload:
•
•
•
•
•
•
•
•
•
Same lost blonde-sounding women’s voice we all love.
Inventek GPS with Sarantel antenna
0.3 PSI rated pressure sensor (higher precision)
Embedded repeater via 70cm and 2m radios
Built in USB for log retrieval and troubleshooting
DS1822 Digital thermometer Internal and External
Sensiron Thermometer and humidity measurement device
2Mb to 4Mb logging memory capacity
Separate, controllable power busses for almost all
electronics to reduce power consumption
• All on a 3.8 x 2.5 double-sided board
Slide 24
ARBONET
ARBONET VOICE BEACON Design Team :
• Patrick Whitfill, Firmware Guru / Operational
Aspects
• Michael Willett, K5NOT, Systems design,
Hardware design and JOAT
Slide 25
ARBONET
The new voice beacon main board:
Slide 26
ARBONET
The new voice beacon main board:
Voice Synthesizer
(Backside)
Analog In
and Servos
Pgm Hdr
USB Hdr
70cm
Antenna
70 cm radio
(backside)
Pressure Sensor
CPU and
memory
USB Chip
(backside)
Power In
GPS
Each section uses Power Control
Open Tracker SMT
2m radio
(backside)
2m
Antenna
Slide 27
ARBONET
The new voice beacon main board:
Slide 28
ARBONET
Slide 29
ARBONET
Project 2:
Slow Scan TV Module
Slide 30
ARBONET
A look at the OE1RIB
Embedded Mobile SSTV
for use in High Altitude
Balloon Flights
Doug Loughmiller, W5BL – ARBONET
GPSL 2010 Hutchinson, KS
July 23rd, 2010
Slide 31
ARBONET
Design Credit
• The concept, design and implementation of the Mobile
Embedded SSTV System is 100% the result of the efforts
of Richard Prinz, OE1RIB who has graciously made his
design materials available to W5BL for use on upcoming
ARBONET flights.
• Doug’s efforts have simply been to identify Richard’s
work and to promote his design as a viable solution for a
low power, low cost, portable SSTV solution suitable for
use as a payload on High Altitude Balloon Flights..
Slide 32
ARBONET
Image Options for High Altitude Balloon Flights
• ATV
– Platform Stabilization, limited ground stations
• Digital Photography / Digital Video
– Excellent Images, but can only be viewed post flight
• SSTV
– Excellent Image quality, downlink in near real-time,
easy ground station solution with receiver, lap-top and
shareware
Slide 33
ARBONET
ARBONET
SSTV Activity
Slide 34
ARBONET
What We Really Want To See!
Slide 35
Commercial, Portable Off-the-Shelf SSTV Options
ARBONET
are Limited
Slide 36
ARBONET
A Novel Home-Brew Solution
• Original Article
Appeared in “Funkamateur” 8/2007
• OE1RIB Web Site:
http://www.min.at/prinz/oe1rib/SSTV/#Purpose
Slide 37
Features of The Universal Mobile Embedded SSTV
ARBONET
System
• Supports Black and White or Color Images Using
Martin 1 with either 320 x 240 or 320 x 256 pixels
• Supports SSTV VIS code, Optional CW station ID
• Multiple transmissions of a captured image or
single transmission of multiple images
• Battery backed Real-time clock for time and date
display on image or via CW
Slide 38
ARBONET
• Built-in temperature sensor in image display or
via CW
• In-circuit Programmable
• User defined Font Editor For Status Text
Messages
• Configurable via RS-232 Port using HyperTermlike serial programs
• Small Form Factor
• Light Weight
Slide 39
ARBONET
System Image Using Martin1
Slide 40
ARBONET
Circuit Details
•
•
•
•
•
•
Microprocessor = Microchip PIC18F458
Video Buffer= AverLogic AL422B
Real Time Clock= Maxim DS1307
Temperature Sensor= Microchip TC74
Camera= Sander/ ETC CAM-C3188A
Low Power System operates at 100 mA during
image capture and transmission , 90 mA at idle.
Slide 41
ARBONET
Construction
• Almost all parts are readily available through
catalog distributors (Mouser, Digi-key etc.)
– Exceptions: Averlogic Frame Buffer, Maxim
MAX1818 and Sanders Camera
• Boards can be obtained through ExpressPCB
• Software downloadable from the Web site
• Some surface mount components
Slide 42
ARBONET
Conclusion
• Ideal Solution for BalloonSat Operations
• Thanks to Richard, OE1RIB for Sharing his
design
• Stay Tuned for Images from Upcoming
ARBONET flights.
• www.arbonet.net
Slide 43
ARBONET