Two-Dimensional Radial Laser Scanning for Circular Marker Detection and External Mobile Robot Tracking
Open Access
- 28 November 2012
- Vol. 12 (12), 16482-16497
- https://doi.org/10.3390/s121216482
Abstract
This paper presents the use of an external fixed two-dimensional laser scanner to detect cylindrical targets attached to moving devices, such as a mobile robot. This proposal is based on the detection of circular markers in the raw data provided by the laser scanner by applying an algorithm for outlier avoidance and a least-squares circular fitting. Some experiments have been developed to empirically validate the proposal with different cylindrical targets in order to estimate the location and tracking errors achieved, which are generally less than 20 mm in the area covered by the laser sensor. As a result of the validation experiments, several error maps have been obtained in order to give an estimate of the uncertainty of any location computed. This proposal has been validated with a medium-sized mobile robot with an attached cylindrical target (diameter 200 mm). The trajectory of the mobile robot was estimated with an average location error of less than 15 mm, and the real location error in each individual circular fitting was similar to the error estimated with the obtained error maps. The radial area covered in this validation experiment was up to 10 m, a value that depends on the radius of the cylindrical target and the radial density of the distance range points provided by the laser scanner but this area can be increased by combining the information of additional external laser scanners.Keywords
This publication has 25 references indexed in Scilit:
- Tree Height Growth Measurement with Single-Scan Airborne, Static Terrestrial and Mobile Laser ScanningSensors, 2012
- Laser Scanning Measurements on Trees for Logging Harvesting OperationsSensors, 2012
- Measuring Oscillating Walking Paths with a LIDARSensors, 2011
- Sensitivity of tree volume measurement to trajectory errors from a terrestrial LIDAR scannerAgricultural and Forest Meteorology, 2010
- Measuring Gait Using a Ground Laser Range SensorSensors, 2009
- Real-Time Tree-Foliage Surface Estimation Using a Ground Laser ScannerIEEE Transactions on Instrumentation and Measurement, 2007
- Effects of external rhythmical cueing on gait in patients with Parkinson's disease: a systematic reviewClinical Rehabilitation, 2005
- Gait characteristics in people with type 2 diabetes mellitusEuropean Journal of Applied Physiology, 2004
- Movement Disorders in People With Parkinson Disease: A Model for Physical TherapyPTJ: Physical Therapy & Rehabilitation Journal, 2000
- Effect of a walking program on gait characteristics in patients with osteoarthritisArthritis & Rheumatism, 1993