Page 173 - Introduction to Autonomous Mobile Robots
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158

                           y                                                              Chapter 4








                                        ρ

                                       α


                                                               x

                           Figure 4.37
                           Extracted line from laser range measurements (+). The small lines at each measurement point repre-
                           sent the measurement uncertainty σ that is proportional to the square of the measurement distance.






                           Table 4.2
                           Measured values
                            pointing angle of sensor θ i  range ρ i
                                    [deg]                [m]
                                     0                     0.5197
                                     5                     0.4404
                                     10                    0.4850
                                     15                    0.4222
                                     20                    0.4132
                                     25                    0.4371
                                     30                    0.3912
                                     35                    0.3949
                                     40                    0.3919
                                     45                    0.4276
                                     50                    0.4075
                                     55                    0.3956
                                     60                    0.4053
                                     65                    0.4752
                                     70                    0.5032
                                     75                    0.5273
                                     80                    0.4879
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