Direction Measurable Ultrasonic Sensing Systems for Mobile Robots 移動ロボットのための方位計測超音波センシング

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Author

    • 矢田, 晃子 ヤタ, テルコ

Bibliographic Information

Title

Direction Measurable Ultrasonic Sensing Systems for Mobile Robots

Other Title

移動ロボットのための方位計測超音波センシング

Author

矢田, 晃子

Author(Another name)

ヤタ, テルコ

University

筑波大学

Types of degree

博士 (工学)

Grant ID

甲第2364号

Degree year

2000-03-24

Note and Description

博士論文

資料形態 : テキストデータ プレーンテキスト

コレクション : 国立国会図書館デジタルコレクション > デジタル化資料 > 博士論文

It is becoming reality that robots act in our living life environment in recent years. Not only in special environment as like factory but also in our daily living office buildings, robots are working without disturbing us. It is important for robot to know environment around itself, in order to move around us safely especially at such conditions. Ultrasonic sensor is one of the most popular external sensor among various external sensors for mobile robots. A pulse-echo method which transmit a pulse and measure deistance using time-of-flight is often used for mobile robot ultrasonic sensor. However, it is difficult to measure accurate bearing angle because of its wide beam width. On the other hand, the reflecting objects in indoor environment can be considered as specular in regard to an ultrasonic wave length in the air. When ultrasound reflect specularly, an area corresponding to a leading edge of an echo is assumed as a point. Consequently, if it is possible to improve bearing measurement accuracy, the ultrasonic sensor can measure the reflecting point. The reflecting point shows special feature of the environment, for example position of corner or bearing angle of wall, which are quantitative information. It is very useful for environment recognition of mobile robots to detect those reflecting points which show such information accurately. In a word, it is really important to develop accurate direction measurable ultrasonic sensor for mobile tobots. Moreover, simplicity and real-time operation are also important to use it for moving mobile robots. Purpose of this reaserch is the development of highly efficient ultrasonic sensors for indoor mobile robots environment recognition. Especially, it emphasized to improve a weak point of ultrasonic sensor, bad bearing accuracy, without injuring merit, fast measurement speed. For this purpose, fast and accurate reflecting points measurement method are proposed, and their usefulness are confirmed by actual proofs on mobile robots in this research. ・・・

1999

Japanese title from p. ii

Bibliography: p. 127-131

Table of Contents

  1. Abstract
  2. Contents
  3. I Introduction
  4. 1 Introduction
  5. 1.1 Mobile robots and sensors
  6. 1.2 Ultrasonic sensing
  7. 1.3 Indoor environment
  8. 1.4 Requirements for mobile robots ultrasonic sensors
  9. 1.5 Purpose of this research
  10. 1.6 Results of this research
  11. 1.7 Thesis outline
  12. II Bearing measurement by a single transducer
  13. 2 Introduction to bearing measurement by a transducer
  14. 2.1 Theoretical back-ground
  15. 2.2 Main idea
  16. 2.3 Overview of Part II
  17. 3 Proposal of bearing measurement using frequency
  18. 3.1 Bearing measurement by frequency difference
  19. 3.2 Measuring method
  20. 3.3 Summary
  21. 4 Experiments on bearing measurement by a transducer
  22. 4.1 Frequency characteristics
  23. 4.2 Evaluations
  24. 4.3 Application to the mobile robot
  25. 4.4 Discussion on the experiment
  26. 5 Conclusion to bearing measurement by a transducer
  27. 5.1 Discussion
  28. 5.2 Conclusion
  29. III Direction measurable sonar-ring
  30. 6 Introduction to direction measurable sonar-ring
  31. 6.1 Background
  32. 6.2 New sonar-ring
  33. 6.3 Overview of part III
  34. 7 Fast and accurate direction measurable sonar-ring
  35. 7.1 Basic ideas
  36. 7.2 Difference from previous methods
  37. 7.3 Summary
  38. 8 Direction measurable sonar-ring system design
  39. 8.1 System architecture
  40. 8.2 Hardware
  41. 8.3 Software
  42. 8.4 Summary
  43. 9 Experiments of direction measurable sonar-ring
  44. 9.1 Evaluation experiments
  45. 9.2 Environment recognizing experiments
  46. 9.3 Conclusive discussion on the experiments
  47. 10 Conclusion to direction measurable sonar-ring
  48. 10.1 Discussion
  49. 10.2 Conclusion
  50. IV Conclusion
  51. 11 Conclusion
  52. 11.1 Discussion
  53. 11.2 Conclusion
  54. Bibliography
25access

Codes

  • NII Article ID (NAID)
    500002107345
  • NII Author ID (NRID)
    • 8000002671436
  • DOI(NDL)
  • Text Lang
    • eng
  • NDLBibID
    • 000000390156
  • Source
    • Institutional Repository
    • NDL ONLINE
    • NDL Digital Collections
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