In order to improve the intelligence and work efficiency of an in-tank wall-climbing robot, a robot localization system using passive acoustic source localization technique is designed. The system receives audio signals emitted from robot with microphone array, and processes the signals with an improved localization method based on time delay estimation, thus the localization of robot is completed. Audio signal processing methods related to the system are represented and the localization data is processed with the Kalman filter algorithm. The system is proved that the positioning error is no more than 12cm within 15m.
[1] 徐芸,刘宝生,费燕琼,等.磁轮式超声串列自动扫查爬壁机器人结构及位置调整[J].机器人,2005,27(4):346-349. Xu Y, Liu B S, Fei Y Q, et al. Structure and position adjustment of an automatic ultrasonic tandem scanning robot with magnetic wheel[J]. Robot, 2005, 27(4): 346-349.
[2] 田兰图,杨向东,赵建东,等.油罐检测爬壁机器人结构与控制系统设计[J].机器人,2004,26(5):385-390. Tian L T, Yang X D, Zhao J D, et al. Structure and control system design of a wall climbing robot for oilcan testing[J]. Robot, 2004, 26(5): 385-390.
[3] Hillenbrand C, Berns K. A sensor system for the localisation of climbing robots[C]//Fourth International Workshop on Robot Motion and Control. Poland: Wydawnictwo Politechniki Poznanskiej, 2004: 109-114.
[4] Woernler C. Flatness-based control of a nonholonomic mobile platform[J]. Journal of Applied Mathematics and Mechanics, 1998, 78(Suppl.1): 43-46.
[5] 靳莹,杨润泽.声测定位技术的现状研究[J].电声技术, 2007,31(2):4-8. Jin Y, Yang R Z. Research status and prospect of the acoustic localization techniques[J]. Audio Engineering, 2007, 31(2): 4-8.
[6] 李从清,孙立新,戴士杰,等.机器人听觉定位跟踪声源的 研究与进展[J].燕山大学学报,2009,33(3):199-205. Li C Q, Sun L X, Dai S J, et al. Research and advance for robot audition to localize and track sound sources[J]. Journal of Yanshan University, 2009, 33(3): 199-205.
[7] 崔玮玮,曹志刚,魏建强.声源定位中的时延估计技术[J]. 数据采集与处理,2007,22(1):90-99. Cui W W, Cao Z G, Wei J Q. Time delay estimation techniques in source location[J]. Journal of Data Acquisition & Processing, 2007, 22(1): 90-99.
[8] Silverman H F, Patterson W R. Visualizing the performance of large-aperture microphone arrays[C]//IEEE International Conference on Acoustics, Speech and Signal Processing. Piscataway, NJ, USA: IEEE, 1999: 969-972.
[9] Valin J M, Michaud F, Rouat J, et al. Robust sound source localization using a microphone array on a mobile robot[C]// IEEE/RSJ International Conference on Intelligent Robots and Systems. Piscataway, NJ, USA: IEEE, 2003: 1228-1233.
[10] 曹国强.声定位系统及其数字信号处理技术的研究[D].南 京:南京理工大学,2001. Cao G Q. Research on acoustics localization system and signal processing[D]. Nanjing: Nanjing University of Science and Technology, 2001.
[11] 陈华伟,赵俊渭,郭业才.五元十字阵被动声定位算法及其 性能研究[J].探测与控制学报,2003,25(4):11-16. Chen H W, Zhao J W, Guo Y C. Acoustic passive localization algorithm based on a planar five-element array and its performance analysis[J]. Journal of Detection & Control, 2003, 25(4): 11-16.
[12] 韩纪庆,张磊,郑铁然.语音信号处理[M].北京:清华大 学出版社,2004. Han J Q, Zhang L, Zheng T R. Speech signal processing[M]. Beijing: Tsinghua University Press, 2004.
[13] 苏先礼.语音去混响研究[D].成都:四川大学,2006. Su X L. The research on speech dereverberation[D]. Chengdu: Sichuan University, 2006.
[14] Welch G, Bishop G. An introduction to the Kalman filter, TR 95-041[R]. USA: ACM, 2001.
