Ibaraki University's
Graduate School of Science and Engineering (Engineering)
Department of Mechanical Engineering


BABA Mitsuru

  • Birth:1953


  1. 日本鋼管株式会社(現JFEスチール株式会社) 入社 1979/04-1982/03
  2. 岡山大学 工学部応用機械工学科助手 1982/04-1990/05
  3. 岡山大学 工学部情報工学科助教授 1990/05-2004/08
  4. 茨城大学 工学部システム工学科教授 2004/09-Present

Academic background

  1. Kyoto University Faculty of Engineering Department of Precision Engineering 1976/03 Graduated
  2. Kyoto University Graduate School, Division of Engineering 精密工学専攻 Master course 1979 Completed

Academic degrees

  1. 工学博士

Research Areas

  1. Measurement Engineering

Research keywords

  1. Three dimensional measurement, Intelligent measurement, Ultrasonic sensing

Subject of research

  1. Measurement of 3D shape and surface reflectance of a specular object This research has proposed a newly method for measurement of the 3-D shape and estimation of the surface reflectance of a columnar object using a laser rangefinder. The laser rangefinder used for the method has the new image sensor, which is able to detect the incident position and incident angle of a light. Using this laser rangefinder, we measured the incident positions and the incident angles for determining the 3-D shapes, and measured the light intensity and the incident angle for determining the surface reflectance of a measured object. The original work of this method lies in the advantage that this laser rangefinder can measure the 3-D shape for both diffuse objects and specular objects, and the proposed method estimates the surface reflectance using the object itself that is used for the 3-D shape measurement. Experimental results show that the proposed method is applicable to non-contact industrial inspections.
  2. A novel fast rangefinder In this paper, we present a new fast rangefinding method based on a non-mechanical scanning mechanism and a high-speed image sensor. Although a light-stripe rangefinding method is often utilized for three-dimensional sensing, it is difficult to acquire dense range data at high-speed using this conventional method. We here propose a fast rangefinding method based on two novel approaches: (1) movement of the parabolic light pattern onto the object by means of a non-mechanical mechanism; and (2) detection of a true peak value using a high-speed image sensor. We have designed and built a prototype rangefinder that was able to acquire a three-dimensional position in 6 micro second, a rate substantially faster than that of conventional rangefinders. We conclude that the proposed method is effective for high-speed three-dimensional measurement.
  3. A New Sensor System for Simultaneously Detecting the Position and Incident Angle of a Light Spot In this paper, we propose a new sensor which detects an incident position and angle of a light spot simultaneously. The sensor consists of two sensor arrays, an incident position detection component, and an incident angle detection component. It was verified that it was the accuracy of 1.89% in the incident position and 0.48 degrees in the incident angle with the experiment by trial sensor system based on this technique.
  4. Position, Pose Measurements and Recognitions for Pillar-like Objects Using Ultrasonic Sensor Array and Neural Networ In this paper, we propose the technique of new measurement and recognition for pillar-like objects using ultrasonic sensor array and neural networks. In this study, we observed that the sound pressure signal and the distribution forms given from ultrasonic sensor array outputs. And we realized the position measurement at high-resolution both in lateral direction and in depth direction of the object by introducing the special position detecting circuit. The experiment using the prototype sensor system showed that this technique is effective for the application to position measurements, pose measurements and shape recognition using the ultrasonic wave.


  1. Research paper (international conference proceedings) Joint Determining Surface Shape of Translucent Objects by Using Laser Rangefinder Kozo Ohtani, Mitsuru Baba, Li Li 2013 IEEE/SICE International Symposium on System Integration CD-ROM 2013/12
  2. Research paper (international conference proceedings) Joint Simple Measurement Method for a Surface Reflection Using a Fisheye Ohtani Kozo, Baba Mitsuru SICE Annual Conference 2013 CD-ROM 2013/09
  3. Research paper (international conference proceedings) Joint Analysis on Propagation of an Ultrasonic Pressure Generated by an Ultrasonic Phased Array Using FDTD Method SICE Annual Conference 2013 CD-ROM 2013/09
  4. Research paper (international conference proceedings) Joint 3D Shape Measurement of a Convex Free-form Curved Inner Surface Producing Interreflection Using Laser Rangefinder Li Li, Kozo Ohtani, Mitsuru Baba SICE Annual Conference 2012 CD-ROM 2012
  5. Research paper (scientific journal) Joint 鏡面反射特性を有する物体に対応した逆光線追跡による 3 次元形状計測法 大谷幸三, 馬場 充 精密工学会誌 78/ 10, 880-886 2012/10

Intellectual property rights

  1. Patent 逆光線追跡法による光沢物体のレーザー3次元形状計測法の考案 特願2009−275592


  1. 2008年度 計測自動制御学会計測部門論文賞 レーザーレンジファインダを用いた柱状物体の3次元形状測定と表面反射特性推定の同時実現法 2009/09/28

Memberships of academic societies

  1. 計測自動制御学会
  2. 電子情報通信学会
  3. IEEE
  4. SPIE
  5. 日本機械学会

Committee Career

  1. 計測自動制御学会 計測部門長 2007/01-Present