Mathematical Model and Calibration Procedure of a PSD Sensor Used in Local Positioning Systems

Sensors

José Luis Lázaro-Galilea¹  Francisco Domingo-Perez¹  David Rodríguez-Navarro¹  Alfredo Gardel-Vicente¹  Ignacio Bravo-Muñoz¹  Georgios Tsirigotis² 

[1] Department of electronics, University of Alcalá, Alcalá de Henares, Madrid 28801, Spain;Informatics Engineering Department, Eastern Macedonia and Thrace Institute of Technology, Kvala 65404, Greece;

关键词: positioning;    measurement;    PSD;    LPS;    calibration;    infrared;   

DOI  :  10.3390/s16091484

来源: DOAJ

【 摘 要 】

Here, we propose a mathematical model and a calibration procedure for a PSD (position sensitive device) sensor equipped with an optical system, to enable accurate measurement of the angle of arrival of one or more beams of light emitted by infrared (IR) transmitters located at distances of between 4 and 6 m. To achieve this objective, it was necessary to characterize the intrinsic parameters that model the system and obtain their values. This first approach was based on a pin-hole model, to which system nonlinearities were added, and this was used to model the points obtained with the nA currents provided by the PSD. In addition, we analyzed the main sources of error, including PSD sensor signal noise, gain factor imbalances and PSD sensor distortion. The results indicated that the proposed model and method provided satisfactory calibration and yielded precise parameter values, enabling accurate measurement of the angle of arrival with a low degree of error, as evidenced by the experimental results.

【 授权许可】

Unknown