DOI: 10.17586/2226-1494-2017-17-4-605-611


SLANT RANGE MEASUREMENT BY IMPULSE LASER RANGE FINDER

V. D. Le, Y. G. Lebedko


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Article in Russian

For citation: Le Dinh Vu, Lebedko E.G. Slant range measurement by impulse laser range finder. Scientific and Technical Journal of Information Technologies, Mechanics and Optics, 2017, vol. 17, no. 4, pp. 605–611 (in Russian). doi: 10.17586/2226-1494-2017-17-4-605-611

Abstract

We consider the problem of slant range distance measurement from aircrafts in conditions of complex spatial structure. The range determination in active laser range finders, including slant range, is based on measuring the time difference of two time points, the time point when the pulse exits the laser range finders, and the time point when the pulse comes back, after being reflected from a target. The signal emission reflected from a target is a variable of random process, because of the irradiated surface length, even under narrow field radiation. When determining the slant range distance from aircraft to a target, it is necessary to identify the signal emission reflected from a target, from background signal reflected by underlying surface. We propose two methods of slant range measurements, provided identification of target that is located on the underlying surface with complex structure. The first method is based on the measurement of slant range distance when the lower edge of the radiation field is aligned with the pointing direction. The second method is based on the measurement of slant range distance when the upper edge of the radiation field is aligned with the pointing direction. We propose structural schemes based on these methods and describe their operation principles. Evaluation of the advantages and disadvantages for each method is given.


Keywords: slant range measurement, reflective impulse characteristics, pulsed laser range finder, underlying surface, beam divergence angle

References
1.     Yang J., Wang X., Gao Y. Accuracy study of time delay estimation techniques in laser pulse ranger. Proceedings of SPIE, 2013, vol. 9046, art. 90461D. doi: 10.1117/12.2038131
2.     Koshelev A.V., Lesnykh I.V., Seredovich V.A., Sinjakin A.K., Karpik A.P. High precision pulsing laser ranger. Proceedings of SPIE, 2002, vol. 4900, pp. 534–536.doi: 10.1117/12.484607
3.     Rongguo F., Chula S., Mengxi L., Yiliang G., Yu C., Benkang C. The research of the laser facula of laser ranger finder in the far distance. Proceedings of SPIE, 2011, vol. 7912, art. 79121Z. doi: 10.1117/12.873565
4.     Stratan A., Zorila A., Rusen L., Nemes G. Measuring effective area of spots from pulsed laser beams. Optical Engineering, 2014, vol. 53, no. 12. doi: 10.1117/1.OE.53.12.122513
5.     Zhen W., Lv X.Y., Mao J.-J., Liu W., Yang D. Method of high precision interval measurement in pulse laser ranging system. Proceedings of SPIE, 2013, vol. 8905. doi: 10.1117/12.2033725
6.     Chen R., Jiang Y. Measurement method of time-of-flight in pulsed laser ranging. Proceedings of SPIE, 2014, vol. 9297. doi: 10.1117/12.2068379
7.     Munteanu I., Mic1o S. Portable laser rangefinder short pulses measurements. Proceedings of SPIE, 2003, vol. 5227, pp. 452–455.
8.     Amann M.C., Bosch T., Lescure M., Myllyla R., Rioux M. Laser ranging a critical review of usual techniques for distance measurement. Optical Engineering, 2001, vol. 40, no. 1, pp. 10–19. doi: 10.1117/1.1330700
9.     Jutzi B., Eberle B., Stilla U. Estimation and measurement of backscattered signals from pulsed laser radar. Proceedings of SPIE, 2003, vol. 4885, pp. 256–267. doi: 10.1117/12.463086
10.  Lebed'ko E.G. Sistemy Impul'snoi Opticheskoi Lokatsii [Pulsed Optical Location Systems]. St. Petersburg, Lan' Publ., 2014, 368 p.
11.  Le L.D., Lebedko Y.G. Analysis of reflection characteristics of the underlying surface at slant range measurement. Journal of Instrument Engineering, 2016, vol. 59, no. 7, pp. 571–577. (In Russian) doi: 10.17586/0021-3454-2016-59-7-571-577
12.  Le L.D., Nguen V.T. Analysis of reflected signals in the measurement of the oblique range. Proc. 4th All-Russian Congress of Young Scientists. St. Petersburg, 2015, pp. 236–240. (In Russian)
13.  Le L.D. Analysis of reflected signals from the underlying surface. Almanac of Scientific Works of Young Scientists of ITMO University, 2015, vol. 2, pp. 104–106. (In Russian)
14.  Lebedko Y.G. Optical Location Systems, Part. 2. St. Petersburg, NRU ITMO Publ., 2012, 129 p. (In Russian)
15.  Lebedko Y.G. Optical Location Systems, Part. 3. St. Petersburg, NRU ITMO Publ., 2013, 110 p. (In Russian)
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