Distance measurement sensor with PIN-photodiode and bridge circuit

Nemecek, A.; Oberhauser, K.; Zimmermann, Horst

doi:10.1109/jsen.2006.870164

Cited by 24 publications

(10 citation statements)

References 7 publications

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“…Therefore the The project is financially supported by the Austrian Bundesministerium fMir Verkehr, Innovation und Technologie via FFG under contract #809393/7845. location of the correlation function relative to a trigger event is sufficient to gain distance information [6]. Also the Signal to Noise Ratio (SNR) can indirectly be increased to a certain extent by repeated measurements and averaging as will be shown.…”

Section: B Reception Powermentioning

confidence: 96%

Distance Measurement Line Sensor with PIN Photodiodes

Nemecek

Oberhauser

Zach

et al. 2006

2006 5th IEEE Conference on Sensors

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A 32 pixel line sensor is presented for range finding applications of non-cooperative targets based on the Time-Of-Flight (TOF) principle of modulated light. The sensor is realized as an OptoElectronic Integrated Circuit (OEIC) containing the PIN photodiode with a high bandwidth of >1GHz together with a high responsivity of 0.45A/W at 660nm and a novel, quasi differential correlating active integrator circuit in each pixel. Distance information is gained in every pixel, integrating the weak received signal correlated with the transmitted modulation signal. The single pixel achieves a minimum standard deviation of 8.5mm in a measurement range of 1.5m-3.2m with an optical transmission power of 1.5mW and a plain white paper target. Exemplarily a scanned 3D depth image of the university logo demonstrates the potential of the sensor. Single pixel size is 210,Im x 105,um with an optical fill factor of 45%. The sensor chip was fabricated in a 0.6,um BiCMOS process including PIN-technology.I.

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Section: B Reception Powermentioning

confidence: 96%

Distance Measurement Line Sensor with PIN Photodiodes

Nemecek

Oberhauser

Zach

et al. 2006

2006 5th IEEE Conference on Sensors

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“…Out of the calculated CF the fundamental wave is extracted by means of Discrete Fourier transform (DFT) and its phase defines the distance according to (1). A more detailed description of the CW based TOF mechanism can be found in [12].…”

Section: Tof Measurement Principlementioning

confidence: 99%

“…In order to provide the same initial conditions, the reset transistor T8 performs discharging of C INT prior to each integration process. As described in [12], due to the photodiode capacitance C PD , the basic bridge circuit suffers from fast saturation. This effect is more emphasized if no PIN photodiode is available due to a higher value of C PD .…”

Section: A Pixel Circuitmentioning

confidence: 99%

Range finding sensor in 90nm CMOS with bridge correlator based background light suppression

Davidović

Zach

Schneider-Hornstein

et al. 2010

2010 Proceedings of ESSCIRC

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Within this work an integrated range finding single pixel sensor manufactured in a standard 90nm CMOS technology is presented. The sensor works on the time-of-flight principle obtaining the distance information out of the correlated sent and received signals. The implementation of a range-finding sensor in 90nm technology is using the most advanced process for a distance sensor up to now based on the bridge circuit. Background light suppression is inherently provided in the pixel sensor. The pixel facilitates a high fill factor accounting to 90% at an area of 50 × 64 µm² and has a power consumption of 2 µW. Measurement results show a standard deviation of 2 cm at 1.2 m covering the range from 0.2 to 3.2 m at 120 klx background illumination.

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“…In den Ein-Pixel-Messsystemen (1D) (Nemecek, Oberhauser, Zimmermann, 2004;Nemecek, Oberhauser, Zimmermann, 2006) kommt bevorzugt der Laser als Lichtquelle zum Einsatz. Kohä rentes Laserlicht lä sst sich leicht auf den gewü nschten Messpunkt fokussieren.…”

Section: Lichtquelleunclassified

Optische Abstandsmessung mit sinusmodulierter LED als Lichtquelle und integriertem Korrelationsempfänger

Ćerimović

Gaberl

Oberhauser

et al. 2008

Elektrotech. Inftech.

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Der vorgestellte integrierte Abstandssensor basiert auf dem Laufzeit-Prinzip (TOF). Die Abstandsinformation wird durch die Korrelation des elektrischen Sendereferenzsignals mit dem empfangenen optischen Signal gewonnen. Der Laboraufbau besteht aus einer sinusmodulierten Lichtquelle (LED), Optik, Sensorchip, Ansteuerlogik und Messauswertung. Die PIN-Brü ckenschaltung ermö glicht dabei eine Hintergrundlichtunterdrü ckung. Durch Mittelung wird fü r Abstä nde bis zu 3 m eine Genauigkeit von besser als 0,5% erreicht. Die Verwendung der LED als Lichtquelle ermö glicht die Anwendung dieses Messkonzepts in Multipixel-Sensoren (2D-und 3D-Anwendungen).Schlü sselwö rter: optische Abstandmessung; Laufzeitmessung; Sinusmodulation der LED; korrelierender SensorOptical distance measurement with sine-modulated LED light source and integrated correlation receiver.The presented integrated distance measurement sensor is based on the time-of-flight principle (TOF). The distance information is gathered by correlation of the transmission reference signal and the modulated received signal. The laboratory setup consists of a sinemodulated light source (LED), optics, sensor chip, controlling logic circuitry and measurement devices. The PIN bridge circuit eliminates the influence of background light. For distances up to 3 m it is possible to reach an accuracy better than 0.5% by averaging. The usage of a LED as light source allows applications with multi-pixel sensors (2D and 3D applications). EinleitungSchnelle, genaue und kostengü nstige 3D-Messsysteme kö nnen als Massenanwendungen in Automobilen, Ü berwachungssystemen oder z. B. in Fertigungsanlagen zur optischen Entfernungsmessung eingesetzt werden. Als Anwendungsbeispiele seien die intelligente Airbagauslö sung in modernen Automobilen oder die Personenerkennung bei Sicherheitskontrollen erwä hnt. Es kö nnen drei verschiedene Arten von optischen Abstandsmesssystemen unterschieden werden. Bei den triangulationsbasierten Messsystemen (Marques, Nunes, de Almeida, 1998) wird die Abstandsinformation ü ber die Winkelverhä ltnisse zwischen gesendetem und empfangenem Lichtstrahl ermittelt. Wegen der teuren mechanischen Teile sind solche Systeme fü r kostengü nstige Massenanwendungen nicht geeignet. Die interferometrischen Abstandsmesssysteme nutzen die Kohä renzeigenschaften von Laserlicht zur hochgenauen Messung im SubWellenlä ngen-Bereich. Schließlich gibt es Messsysteme basierend auf dem so genannten Time-of-Flight-Prinzip (TOF), wobei die Laufzeit eines gesendeten Lichtsignals hin zum Objekt und zurü ck zum Detektor bestimmt wird. Im Wesentlichen werden dabei wiederum zwei verschiedene TOF-Methoden unterschieden.Bei gepulsten Laufzeitsystemen (Pulsed run time systems) (Palojä rvi, Mä ä ttä , Kostamovaara, 1997;Viarani et al., 2004) wird die Laufzeit eines gesendeten Lichtpulses direkt gemessen. In inkohä renten optischen Systemen (optical incoherent systems) wird das gesendete Licht intensitä tsmoduliert. Die Phasenverschiebung zwischen gesendetem und empfangenem Signal liefert dann die g...

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Distance measurement sensor with PIN-photodiode and bridge circuit

Cited by 24 publications

References 7 publications

Distance Measurement Line Sensor with PIN Photodiodes

Distance Measurement Line Sensor with PIN Photodiodes

Range finding sensor in 90nm CMOS with bridge correlator based background light suppression

Optische Abstandsmessung mit sinusmodulierter LED als Lichtquelle und integriertem Korrelationsempfänger

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