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MIROS Range Finder

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GLOSS Workshop 14 - 16 October 2003. Presentation of sensor, ... 9600 baud. 8. None. 1 -Data format. hh.hhh HT aa.aaa CR LF -Power on text ... – PowerPoint PPT presentation

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Title: MIROS Range Finder


1
MIROS Range Finder
Presentation of sensor, principles of design and
associated software. References on uses.
  • MIROS A/S
  • Rune Gangeskar Elisabeth Nøst
  • GLOSS Workshop 14 - 16 October 2003

2
SM-094 Range Finder
Range Finder
Microwave-based
3 cm wave length
3
SM-094 Range Finder
Range Finder
Statistical description of range / water level
Range time series
Microwave-based
Wave spectrum wave height
3 cm wave length
4
Range Finder
Types
SM-094/10
1 to 10 m
10 degrees beam width
SM-094/20W
1 to 20 m
SM-094/20N
3 to 20 m
SM-094/50
3 to 50 m
5 degrees beam width
SM-094/85
3 to 85 m
5
Range Finder
Some essential specifications
Accuracy averaged measurements
1 mm
Accuracy single measurement
1 cm
Dimensions
70 x 510 x 420 mm
Weight
7 kg
Power
22 - 32 V. 0,2 A
Emitted frequency
9,4 - 9,8 GHz
Emitted power
0,25 mW
Digital interface
RS-422 / RS-232
Analog output
0 - 10 V
6
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7
Range Finder
Digital interface
-Electric interface
RS-422 (standard)
RS-232
-Character code
ASCII
-Speed
9600 baud
-Number of data bits
8
-Parity
None
-Stop bits
1
-Data format
hh.hhhltHTgtaa.aaaltCRgtltLFgt
-Power on text
MIROS altimeter digital signal processing started
Noise spectrum is cleared
8
Range Finder
Measurement principle
-Frequency modulated signal 9,4 - 9,8 GHz
-Range Delay Frequency
-Integration over up-down-sweep eliminates
Doppler contribution
9
Range Finder
Signal processing (briefly)
Emitted signal
Difference- frequency
Received signal
10
Range Finder
Signal processing (briefly)
Provides side lobe damping
Finds the frequency
contents of the signal
Emitted signal
Hamming- windowing
Difference- frequency
FFT (Fast Fourier Transform)
Received signal
11
Range Finder
Signal processing (briefly)
Provides side lobe damping
Finds the frequency
contents of the signal
Emitted signal
Hamming- windowing
Difference- frequency
FFT (Fast Fourier Transform)
Received signal
Removal of fixed echoes (optional)
Pier, platform structure,...
Top detection
Threshold detection
12
Range Finder
Signal processing (briefly)
Provides side lobe damping
Finds the frequency
contents of the signal
Emitted signal
Hamming- windowing
Difference- frequency
FFT (Fast Fourier Transform)
Received signal
Removal of fixed echoes (optional)
Pier, platform structure,...
Tracking
Interpolation
Top detection
Threshold detection
13
Range Finder
Tracking (internal)
Eliminates effects of
-Multi-path
-Multiple time around
-Lost signal for a short period
14
Range Finder
Tracking window size
Lost signal time-out
tout
win
Tracking window time constant
wtc
Software parameters
det
Detection level
15
Range Finder
Tracking window size
Lost signal time-out
tout
win
Tracking window time constant
Analogue or digital signal output
wtc
ser
Software parameters
htc
det
Detection level
Data averaging time constants
atc
16
Range Finder
Tracking window size
Lost signal time-out
tout
win
Tracking window time constant
Analogue or digital signal output
wtc
ser
Software parameters
htc
det
Detection level
Data averaging time constants
atc
help
List all available commands
ntc
ch
Actual measurement range
Suppression of fixed echoes time constant
all
Print current parameter settings
17
Range Finder
Digital Signal Processor (DSP)
Miros is now finishing the work with a new
generation Range Finder
Several new features
-Internal data storage with capacity of years of
data
-Internal processing of time series to obtain
wave information
-Higher data output rate (up to 100 Hz)
-Higher utilization of electromagnetic return
from sea surface
Top
Bottom
18
Water Level Software
MirSip09 Water Level Interface
MirAdm04 System Manager
MirPro10 Wave Spectrum Processing
MirPro08 Time Series To Spectrum
MirPresF Display System
19
Water Level Software
MirSip09 Water Level Interface
MirAdm04 System Manager
MirPro10 Wave Spectrum Processing
MirPro08 Time Series To Spectrum
MirPresF Display System
20
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31
Range Finder
References on uses
Miros has up to now delivered about 35 range
finders with good operational results
Range Finder used in tide level projects
-Trondhjem (ref. Sea Technology, September 2002)
-ESEAS, Villagarcía in Spain
-NOAA
-Incheon Test Site in Korea
-Offshore context Draugen, Heidrun
32
Range Finder
References on uses
Miros has up to now delivered about 35 range
finders with good operational results
Range Finder used in tide level projects
-Trondhjem (ref. Sea Technology, September 2002)
-ESEAS, Villagarcía in Spain
-NOAA
-Incheon Test Site in Korea
-Offshore context Draugen, Heidrun
Range Finder has been used on platforms
-Air gap, subsidence
-Non-directional wave monitoring
NOAA has used several sensors for bridge
clearance measurements
Range Finder has been used on military and
commercial very high speed vessels
-Air gap monitoring
-Structural testing
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