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Optoelectronic Sensor Systems
Visit Mid-Sweden University - November 2006
Prof. Dr. Arno Ruckelshausen Faculty of Engineering and Computer Science
Interdisciplinary Research Center Intelligent Sensor Systems (ISYS)
Optoelectronic Sensor Systems
Optoelectronic Sensor Systems
Overview
AutoScan: Online measurement in an agrcultural harvesting process
Light curtains
Optoelectronic Sensor Systems
OverviewOverviewOverview
AutoScan: Online measurement in an agrcultural harvesting process
Light curtainsLight curtainsLight curtains
Optoelectronic Sensor Systems
Sensor „AutoScan“: Automatic cutting length variation
Online-measurement of the degree of maturity for maize plants
Optoelectronic Sensor Systems
Spectrometer
Measurement of the light intensity as a function of the wavelegth
Physical Effect: Diffraction, optical grid
Sources: tec5, Zeiss
Optoelectronic Sensor Systems
Spectral characteristics of maize plants
Method: Spectrometer measurements è selective wavelengths
Optoelectronic Sensor Systems
LED
LED
Photo diode
Block diagram: AutoScan-Sensor
„brown“ maize
„green“ maize
Optoelectronic Sensor Systems
Boundary conditions and solution concept
Ø Measurement position
Ø Covering
Ø Optical measurement: feasibilty
Ø Fast measurement: 2 wavelengths
Ø Software for statistical analysis
Ø Microcontroller-based solution
Ø Self-cleaning effect (maize plants)
Optoelectronic Sensor Systems
Ø Automatic online detection of the degree of maturity
Ø Automated optimization of the cutting length
Ø Stabile silage
Ø Automatic optimization of the animal food structure
Ø Electronic documentation (including GPS)
Ø Application of an optoelectronic system in rought boundary conditions
Ø Driver assistance
Results „AutoScan“
Optoelectronic Sensor Systems
OverviewOverviewOverview
AutoScanAutoScanAutoScan: Online : Online : Online measurement measurement measurement in an in an in an agrcultural harvesting processagrcultural harvesting processagrcultural harvesting process
Light curtains
Optoelectronic Sensor Systems
Quelle: “3D Imaging” , Tino Görtemöller, Christoph Höhn, Modul „Image Sensors“, Fachhochschule Osnabrück, WS04/05, weitere dort zitierte Quellen, insbesondere zur 3D-Kamera „SwissRanger“
3D-Imaging : Combining optical and distance information
Optoelectronic Sensor Systems
History of light curtains (1): Security / Safety
Quellen: www.hvbg.de www.lucom-gmbh.de
Optoelectronic Sensor Systems
Quelle: www.lucom-gmbh.de
History of light curtains (2): Extended data analysis
Optoelectronic Sensor Systems
dire
c tio
n of
mot
i on
latitude
side view
trigger
New application of light curtains: Sensor-based imaging
Optoelectronic Sensor Systems
Beam 1
Beam 2
Beam 3
Beam 4
Beam 5
Beam 6
Beam 7
Beam n-1
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t0
Beam 1Beam 2Beam 3
Beam n
tb 2tb 3tb 4tb n tb
Pulsed version of a light curtain
Optoelectronic Sensor Systems
transmitter
receiver
Measuring distance
Beam distance
CLK
O E
Q0
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Q5
Q6
Q7D7
D6
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IU
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CLK
O E
Q0
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D0
µC
receivertransmitter Latch
Architecture of the “HPS-HR“ (Height Profile Sensor / High Resolution)