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RAAD 2006. June 15-17. Budapest Tech, John von Neumann Faculty of Informatics PAL COMMANDER Mobile Robot Navigation Using Omnidirectional Vision Mornailla László Pekár Tamás Solymosi Csaba Vámossy Zoltán
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy2 2006. June, RAAD Goals Mobile robot Multiple navigation types Homogeneous, weakly-textured environment Obstacle avoidance Line following Object following
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy3 2006. June, RAAD The Construction
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy4 2006. June, RAAD RC controlling Opto coupler (CNY 744) 6 movement direction Parallel port Possible controlling commands: 0: stop 1: forward 2: backward 4: wheels right 6: right backward 7: right forward 8: wheels left 9: left forward 10: left backward No precision controlling
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy5 2006. June, RAAD Modell RC controlling I. Variable communication frequency Precision controlling Serial port Direction #0 - #17: left #18 - #19: center #20 - #40: right Speed #0 - #21: backwards #22: stop #23 - #40: forwards PIC microcontroller (18F1320) 2 level interrupt
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy6 2006. June, RAAD Modell RC controlling II. The circuitry of the extra electronics Generated controlling impulses (PIC) 1. impulse: 15ms periodical time 2. impulse: setting the direction 3. impulse: setting the direction
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy7 2006. June, RAAD Mobile robots RCModell RC
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy8 2006. June, RAAD The PAL-optics Advantages No need of moving components No need of focusing Direction, and angle of surrounding object can be directly computed Projects the 360º degrees of the environment to 2D Circular image Can be described by a polar coordinate-system Blind spot Properties: PAL center Inner radius (r1) Outer radius (r2) Angle of field of view
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy9 2006. June, RAAD Controlling Software Input Preprocessing Decision maker Mapper Navigation
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy10 2006. June, RAAD Preprocessing RGB HSL Treshold Edge detection Canny Controlling Software Preprocessing I. (1) (2) (3) (4)
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy11 2006. June, RAAD Controlling Software Preprocessing II. (1)(2)(3) (4)(5) 1, raw image 2, HSL filtered 3, (2) + binatization 4, HSL + pixelate 5, (4) + threshold
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy12 2006. June, RAAD One complex algorithm Line following Object following “Free fall” navigation Controlling Software Decision Maker Parameters Distance Scanning degree Threshold minimum
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy13 2006. June, RAAD Controlling Software Mapper module
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy14 2006. June, RAAD Controlling Software User interface
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy15 2006. June, RAAD Results RC test video Line following Nearly homogeneous ground White line Difficulties White line, white wall Reflection of the ground Relatively fast
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy16 2006. June, RAAD Results Modell RC testvideo
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy17 2006. June, RAAD Conclusion Easily reproducible components Low-cost Simple reconstruction Improvements Mapping module
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy18 2006. June, RAAD References Omnidirectional Vision page: http://www.cis.upenn.edu/~kostas/omni.html http://www.cis.upenn.edu/~kostas/omni.html Veress, M. and Greguss, P. (1998), Centric Minded Imaging in Space Research, In: Proc. of 7th International Workshop on RAAD'98, (K. Dobrovodsky (Ed.)), pp. 121 - 126. Bratislava, Slovakia. Kónya László - Mikrovezérlők alkalmazástechnikája, ChipCAD Elektronikai Disztribúció Kft., 2000,2003 SharperCV by Peter Wentworth http://www.cs.ru.ac.za/research/groups/SharperCV http://www.cs.ru.ac.za/research/groups/SharperCV
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy19 2006. June, RAAD Thank you for your attention! We would be glad to hear about any interest in the project. Contact palcommander@googlegroups.com palcommander@googlegroups.com Web site: http://palcom.bmfnik.hu http://palcom.bmfnik.hu
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PAL-Commander László Mornailla,Tamás Pekár, Csaba Solymosi, Zoltán Vámossy20 2006. June, RAAD Questions?
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