Electromechanical 3D Optoelectronic Scanners: Resolution Constraints and Possible Ways of Improvement

Sergiyenko, Oleg; Tyrsa, Vera; Básaca-Preciado, Luís C.; Rodríguez-Quiñones, Julio C.; Hernández, Wilmar; Hipólito, Juan Iván Nieto; López, Miguel A.; Starostenko, Oleg

doi:10.5772/14263

Cited by 14 publications

(11 citation statements)

References 39 publications

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“…The use of the triangulation method in laser scanning systems can be of static or dynamic characteristic (Sergiyenko et al, 2011). Static characteristic is referred to an operation mode without moving the PL or the SA, which results in a statically behavior of the triangulation.…”

Section: Static Versus Dynamic Triangulationmentioning

confidence: 99%

“…The pulses count of 4,000 in ( 12) is basically enough for sufficient resolution for majority of applications in modern technology. However, it still can be improved using the method of perfect pulses coincidence search in Sergiyenko et al (2012). In the case of industrial robot navigation, the use of method in Sergiyenko et al (2012) is complementary with use of method in Hernandez et al (2009).…”

Section: Actual Angular Position Measuringmentioning

confidence: 99%

“…However, it still can be improved using the method of perfect pulses coincidence search in Sergiyenko et al (2012). In the case of industrial robot navigation, the use of method in Sergiyenko et al (2012) is complementary with use of method in Hernandez et al (2009).…”

Section: Actual Angular Position Measuringmentioning

confidence: 99%

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Exact laser beam positioning for measurement of vegetation vitality

Линднер¹,

Sergiyenko²,

Rivas-López³

et al. 2017

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Purpose The purpose of this paper is to present a novel application for a newly developed Technical Vision System (TVS), which uses a laser scanner and dynamic triangulation, to determine the vitality of agriculture vegetation. This vision system, installed on an unmanned aerial vehicle, shall measure the reflected laser energy and thereby determine the normalized differenced vegetation index. Design/methodology/approach The newly developed TVS shall be installed on the front part of the unmanned aerial vehicle, to perform line-by-line scan in the vision system field-of-view. The TVS uses high-quality DC motors, instead of previously researched low-quality DC motors, to eliminate the existence of two mutually exclusive conditions, for exact positioning of a DC motor shaft. The use of high-quality DC motors reduces the positioning error after control. Findings Present paper emphasizes the exact laser beam positioning in the field-of-view of a TVS. By use of high-quality instead of low-quality DC motors, a significant reduced positioning time was achieved, maintaining the relative angular position error less than 1 per cent. Best results were achieved, by realizing a quasi-continuous control, using a high pulse-width modulated duty cycle resolution and a high execution frequency of the positioning algorithm. Originality/value The originality of present paper is represented by the novel application of the newly developed TVS in the field of agriculture. The vitality of vegetation shall be determined by measuring the reflected laser energy of a scanned agriculture zone. The paper’s main focus is on the exact laser beam positioning within the TVS field-of-view, using high-quality DC motors in closed-loop position control configuration.

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Section: Static Versus Dynamic Triangulationmentioning

confidence: 99%

Section: Actual Angular Position Measuringmentioning

confidence: 99%

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Exact laser beam positioning for measurement of vegetation vitality

Линднер¹,

Sergiyenko²,

Rivas-López³

et al. 2017

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“…Application in PL of TVS Micro-Electromechanical Transmission (MET) with combined scanning step. This is the most permissive of possible ways in resolution constraints improvement [11]. Some of them can be ignored under the simple criterion that robot cannot path there.…”

Section: Problem Statementmentioning

confidence: 99%

“…The avoidance strategy proposed in [10] is to avoid obstacles regardless of their shape. A good review of 3D model acquisition techniques can be found in [11,12]. The most crucial point in this case is a time of scanning.…”

Section: Introductionmentioning

confidence: 99%

Fast Obstacle Detection by Variable Step of 3D Laser Scanning for Robot Navigation on Unknown Planet

OYu¹

2013

J Appl Mech Eng

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In the exploration of another planet by mobile robot the slow 3D scanning caused by small step can be a problem. It can be increased by combined scanning step for faster search of n obstacles in unknown surrounding. This is of keynote importance in automatic robot navigation, especially on the surface of another planet. To maintain a reasonable speed robot must to detect dangerous obstacles as soon as possible, and then calculate a safe trajectory in real time. So, the scanning with variable speed and precise digital mapping only for selected spatial sectors is under consideration here. Wide range of simulations in MATLAB of several scenes with variable n obstacles, scanning it with angle value since 0.6˚ up to 15˚ was provided aiming to detect such angular values still permitting to get the most information about obstacles without undesired time loss. Three of such angles were obtained in simulation and then rectified by Levenberg-Marquradt Algorithm application and were applied to micro electro transmission design for practical realization of variable combined step scanning on our previously known laser scanner. in laser positioning system, designing a micro electromechanical transmission for that job. Journal of Applied Mechanical EngineeringJ ou rnal of A p p li e d Me cha n ic a l E n gi neerin g

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