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The Performance Improvement of the Target Position Determining System in Laser Tracking Based on 4Q Detector using Neural Network

Authors: A. Salmanpour, Sh. Mohammad Nejad


One of the methods for detecting the target position error in the laser tracking systems is using Four Quadrant (4Q) detectors. If the coordinates of the target center is yielded through the usual relations of the detector outputs, the results will be nonlinear, dependent on the shape, target size and its position on the detector screen. In this paper we have designed an algorithm with using neural network that coordinates of the target center in laser tracking systems is calculated by using detector outputs obtained from visual modeling. With this method, the results except from the part related to the detector intrinsic limitation, are linear and dependent from the shape and target size.

Keywords: four quadrant detector, laser tracking system, rangefinder, tracking sensor

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[1] M. Baba, K. Ohtani, "A new sensor system for simultaneously detecting the position and incident angle of a light spot," J. Opt. A: Pure Appl. Opt. 4, pp. 391-399, 2002.
[2] S. Rajan, S. Wang, R. Inkol, "Efficient approximations for the fourquadrant arctangent function,". Proc. Canadian Conf. Electrical and Computer Engineering, Ottawa, Ontario, pp. 1043-1046, 2006.
[3] W. Shuzhen, X. Tiebanga, C. Suping ,"Study on detecting laser interference fringes using four-quadrant optoelectronic detectors," IEEE Int. Conf. Electrical and Control Engineering, pp. 15-64, 2010.
[4] A. Makynen, " Position-sensitive devices and sensor systems for optical tracking and displacement sensing applications," Department of Electrical Engineering, University of Oulu, Finland, 2000.
[5] M. Baba, K. Ohtani, M. lami, T. konishi "New laser rangefinder for three- dimensional shape measurement of specular objects," J. Opt. Eng. 40, pp. 53-60, 2001.
[6] G. Borges, A.Lima, G. Deep, "Characterization of a trajectory recognition optical for an automated guided vehicle," IEEE Trans. Instrumentation and Measurement, vol. 49, NO. 4, pp. 813-819, August 2000.
[7] A. Makynen, J. Kostamovaara, R. Myllyla, "A high-resolution lateral displacement sensing method using active illumination of a cooperative target and a focused four-quadrant position-sensitive detector," IEEE Trans. Instrumentation and Measurement, vol. 44, NO. 1, pp. 46-52, February 1995.
[8] A. Makynen, J. Kostamovaara, R. Myllyla, "Positioning resolution of the position-sensitive detectors in high background illumination," IEEE Trans. Instrumentation and Measurement, vol. 45, NO. 1, pp. 324-326, February 1996.
[9] A. Makynen, J. Kostamovaara, R. Antero, "Displacement sensing resolution position sensitive detectors in atmospheric turbulence using retoreflected beam," IEEE Trans. Instrumentation and Measurement, vol. 46, NO. 5, pp. 1133-1126, October 1997.
[10] S. Rajan, S. Wang, R. Inkol, "Error reduction technique for fourquadrant arctangent approximations," IET Signal Process, Vol. 2, No. 2, pp. 133-138, 2008.
[11] T. Takatsuji, M. Goto, A. Kirita, T. Kurosawa, Y. Tanimura, "The relationship between the measurement error and the arrangement of laser trackers in laser trilateration," IOP Meas. Sci. Technol. 11, pp. 477-483, 2000.
[12] E. Akkal, "Control actuation systems and seeker units of an air-tosurface guided munitions," M.S. Thesis, Department of Electrical and Electronics Engineering, Middle East Technical University, 2003.
[13] J. Tranchita and others ," Infrared and electro-optical systems handbook," SPIE Optical Engineering Press, Vol. 7, Counter Measure Systems, Chapter. 3, 1993.
[14] W. Wolfe, G. Ziissis, "The infrared hand book, chaper 22: tracking systems," Environmental Research Institute of Michigan, Ann Arbir, MI 1985.