Comparison of different control loop concepts for direct distance measurement using photonic mixing devices (PMD)
SENSORS, 2002 IEEE - Tập 1 - Trang 151-155 vol.1
Tóm tắt
This paper presents two different control loop approaches for distance measurement with photonic mixing devices (PMD). Possible all-analog implementations are pointed out, and measurements with two different loop types using our laboratory PMD system are provided. It is shown that the PI control loop implementation reaches distance accuracy comparable to previous modulation methods, but on the other hand suffers from present offsets of the PMD. For the second method, the steepest descent algorithm, contrary results are obtained. This method is not susceptible to offset variations, but requires a fairly high SNR to converge. Finally the requirements for all-analog closed loop implementation imposed on the next generation of PMD elements are pointed out.
Từ khóa
#Optical control #Distance measurement #Phase modulation #Control systems #Voltage control #Delay effects #Phase measurement #Time measurement #Phased arrays #ConvergenceTài liệu tham khảo
becker, 2002, Novel Control Loop Concept for Direct Distance Measurement Using Photonic Mixing Devices (PMD), Opto 2002
10.1109/EUMA.2000.338885
1994, Neural Networks A Comprehensive Foundation
rudolf, 1997, Schnelle und einfache optische Formerfassung mit einem neuartigen Korrelations-Photodetektor-Array, DGZfp-GMA-Fachtagung in Langen 28 /29
buxbaum, 2000, Pseudo-Noise-Laserradar zur schnellen 3D-Aufnahme auf Basis der PMD-Smart Pixel Technologie, VDI Berichte Nr 1572
unbehauen, 1995, Regelungstechnik, Bd.3, Identifikation, Adaption, Optimierung
gulden, 2001, Navel Opportunities for Optical Level Gauging and 3D-Imaging with the Photoelectronic Mixing Device, IMTC 2001
schwarte, 1997, Pseudo-Noise (pN)-laser radar without scanner for extremely fast 3D-imaging and navigation, MIOP 97 (Microwaves and Optronics)
fritz, 2000, Das Phasengradienten-verfahren als systematische und globale Optimierungstheorie für alle klassischen Reglertypen
schwarte, 1997, A new electrooptical mixing and correlating sensor: Facilities and Application of the Photonic Mixer Device (PMD), Laser 97 Munich