Kyushu University Academic Staff Educational and Research Activities Database
List of Papers
Takao Sajima Last modified date:2021.06.14

Assistant Professor / Manufacturing Processes / Department of Mechanical Engineering / Faculty of Engineering


Papers
1. Hiroshi Murakami, Akio Katsuki, Takao Sajima , Kosuke Uchiyama, Keisuke Houda, Yuta Sugihara, Spindle with built-in acoustic emission sensor to realize contact detection, Precision Engineering 70(2021), 63, 26-33, 2021.02.
2. Kosuke Uchiyama, Hiroshi Murakami, Akio Katsuki, Takao Sajima, Takahiko Yamamoto and Kunitaka Fujiyoshi, Improvement of an optical fiber stylus for microstructure and surface roughness measurement, euspen’s 20th International Conference, 2020.06.
3. Hiroshi Murakami, Akio Katsuki, Takao Sajima, Kosuke Uchiyama, Ichiro Yoshida, Yasuo Hamano, Hiroshi Honda, Development of measurement system for microstructures using an optical fiber probe
Improvement of measurable region and depth, Measurement Science and Technology, 10.1088/1361-6501/ab7efc, 31, 7, 2020.04, The precise measurement of microstructures and other micron-sized materials has garnered considerable interest in recent years. However, a limited measurement region and the unavailability of miniaturized probes are the major issues in the realization of such systems. In this study, we have presented a system for microstructures based on a small-diameter optical fiber probe. In the improved measurement system, the prism was installed near the stylus shaft to expand the measurable region and depth. This means that there is no limitation on the width of the measurement object. The standard deviation of the repeatability of the point measurement in the X-, Y- and Z-directions was 31, 38 and 19 nm, respectively. A pin gauge with a diameter of 100 m was measured ten times for assessing the repeatability of measurements in the X- and Y-directions. The standard deviation of the diameter in these measurements was 25 nm. A step height standard with a calibrated height of 189.6 nm was measured ten times for assessing the repeatability of measurement in the Z-direction. The average height in these measurements was obtained as 200.2 nm with an expanded uncertainty of 49.3 nm (coverage factor k = 2). We confirmed that this system enabled accurate measurement in the X-, Y- and Z-directions..
4. Akio Katsuki, Takao Sajima, Hiroshi Murakami, Ali Md Hazrat, Osamu Ohnishi, Kouji Akashi, Development of a laser-guiding-type deep small-sized hole-measurement
system: Measurement accuracy, Precision Engineering, 63, 18-32, 2020.05.
5. Akio Katsuki, Takao Sajima, Hiroshi Murakami, Ali Md Hazrat, Osamu Ohnishi, Kouji Akashi, Development of a laser-guiding-type deep small-sized hole-measurement system
Measurement accuracy, Precision Engineering, 10.1016/j.precisioneng.2019.12.012, 63, 18-32, 2020.05, In this study, a system for measuring small-sized holes with a 17–21 mm diameter and 1000 mm length was constructed. The system comprises a laser interferometer to detect hole accuracy, a probe connected to a measurement bar, and an optical apparatus for detecting the probe attitude (position and inclination). The probe was supported by supporting pads. A steel workpiece with 18 -mm diameter and 800 mm length was used for the performance test. During the experiment, errors were found in terms of hole deviation and roundness profile. Further experiments, using new experimental apparatus and analysis, revealed the causes of errors: electrical noise that increased with time, two periodic stylus swings in the longitudinal direction of the hole per rotation of the measurement unit, and the excessive spring force pushing the tip of the stylus, causing a large frictional force with the hole wall, etc. If these errors are corrected, high accuracy in the measurement of hole deviation and roundness can be achieved..
6. Hiroshi Murakami, Akio Katsuki, Takao Sajima, Kosuke Uchiyama, Ichiro Yoshida, Yasuo Hamano, Hiroshi Honda, Investigation of factors affecting sensitivity enhancement of an optical fiber probe for microstructure measurement using oblique incident light, Applied Sciences (Switzerland), 10.3390/app10093191, 10, 9, 2020.05, Recently, the demand for accuracy measurement of microstructures has been remarkable. We have been developing a measurement system for microstructures using a stylus made of an optical fiber and prisms. In this measurement system, the oblique irradiation of the laser beam was employed to detect the displacement of the stylus shaft generated by contact between the stylus tip and the measured surface, and to expand the measurable area and depth. After these evaluations, we discovered that the sensitivity was enhanced with the increase in the incident angle of the laser beam on the stylus shaft. Therefore, in this study, we focus on the effect of the incident angle of light on the measurement sensitivity. First, the enhancement sensitivity is confirmed by using the basic experimental apparatus. Next, the relationship between the incident angle of the laser beam and the sensitivity is theoretically examined using the 3D ray-tracing method. Finally, the factor of the sensitivity enhancement is analyzed using the same method. As a result, it was confirmed that the sensitivity was enhanced with the increase in the incident angle of the laser beam on the stylus shaft..
7. Daisuke Tabuchi, Takao Sajima, Eiji Kondo, Takeshi Tane, Naoki Noguchi, Effect of manufacturing method on the strength of FW-CFRP, Precision Engineering and Nanotechnology(ASPEN 2019), 2019.11.
8. Hiroshi Murakami, Akio Katsuki, Takao Sajima, Kosuke Ucihyama, Takahiko Yamamoto, Ryosuke Nagata, Kunitaka Fujiyoshi, High functionality of an optical fiber stylus for micro metrology, Proceedings of the Laser Metrology and Machine Performance XIII (Lamdamap2019), 2019, 2019.03.
9. Amine Gouarir, Syuhei Kurokawa, Takao Sajima, Mitsuaki Murata, Influence of Coating in Square End Mill Using In-Process Tool Wear Detection Based on Electrical Contact Resistance, International Journal of Automation Technology, 13, 1, 125-132, 2019.01.
10. Uchiyama Kosuke, Hiroshi Murakami, Akio Katsuki, Takao Sajima, Takahiko Yamamoto, Ryosuke Nagata, Kunitaka Fujiyoshi, Fabrication of a fiber probe using a CO2 laser for microstructure measurement: High functionality and durability test, Proceedings of the 8th CIRP Conference on High Performance Cutting (HPC 2018), 2018, 2018.06.
11. Hiroshi Murakami, Akio Katsuki, Takao Sajima, Kosuke Uchiyama, Fabrication of an ultra-small-diameter optical fiber probe using an acid-etch technique and a CO2 laser for 3D micro metrology, International Journal of Automation Technology, 699-760, 2017.11.
12. Uchiyama Kosuke, Hiroshi Murakami, Akio Katsuki, Takao Sajima, Yamamoto Takahiko, Nagata Ryosuke, Fabrication of Probe Tips for Nanoscale 3D Metrology, Proceedings of the 32nd American Society for Precision Engineering (ASPE) Annual Meeting, 2017, 305-310, 2017.10.
13. Akio Katsuki, 佐島 隆生, Hiroshi Murakami, Development of a laser-guided deep-small-sized hole measurement system – Improvement of measurement accuracy
, Präzisions- und Tiefbohren aktuell, 145-158, 2017.03.
14. Hiroshi Murakami, Akio Katsuki, 佐島 隆生, Development of Touch Probing System Using a Fiber Stylus, Fibers, 10.3390/fib4030024, 4, 3, 1-13, 2016.08, This paper presents a system that can be used for micro-hole measurement; the system comprises an optical fiber stylus that is 5 µm in diameter. The stylus deflects when it comes into contact with the measured surface; this deflection is measured optically. In this study, the design parameters of the optical system are determined using a ray-tracing method, and a prototype of the probing system is fabricated to verify ray-tracing simulation results; furthermore, the performance of the system is evaluated experimentally. The results show that the design parameters of this system can be determined using ray-tracing; the resolution of the measurement system using this shaft was approximately 3 nm, and the practicality of this system was confirmed by measuring the shape of a micro-hole 100 µm in diameter and 475 µm in depth..
15. Hiroshi Murakami, Akio Katsuki, 佐島 隆生, Mitsuyoshi Fukuda, Reduction of Liquid Bridge Force for 3D Microstructure Measurements, APPLIED SCIENCES-BASEL, 10.3390/app6050153, 6, 5, 1-11, 2016.05, Recent years have witnessed an increased demand for a method for precise measurement of the microstructures of mechanical microparts, microelectromechanical systems, micromolds, optical devices, microholes, etc. This paper presents a measurement system for three-dimensional (3D) microstructures that use an optical fiber probe. This probe consists of a stylus shaft with a diameter of 2.5 µm and a glass ball with a diameter of 5 µm attached to the stylus tip. In this study, the measurement system, placed in a vacuum vessel, is constructed suitably to prevent adhesion of the stylus tip to the measured surface caused by the surface force resulting from the van der Waals force, electrostatic force, and liquid bridge force. First, these surface forces are analyzed with the aim of investigating the causes of adhesion. Subsequently, the effects of pressure inside the vacuum vessel on surface forces are evaluated. As a result, it is found that the surface force is 0.13 µN when the pressure inside the vacuum vessel is 350 Pa. This effect is equivalent to a 60% reduction in the surface force in the atmosphere..
16. MD. Hazrat ALI, Akio Katsuki, 佐島 隆生, Hiroshi Murakami, Syuhei Kurokawa, Control strategy of developed mechanical actuator in measuring hole surface parameter, INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY, 10.1007/s00170-013-5420-0, 84, 5-8, 777-786, 2016.05, This paper presents the control strategy of a new type of mechanical actuator used to help in measuring hole surface parameter. The actuator can carry up to a load of 26 kg during measurement. Often, the measurement unit’s attitude is misaligned due to the force acting on it. Actuator is used in order to control the misalignment of such system during measurement. In this research, the complete measurement system consists of a servo motor, a laser diode, a laser interferometer, an optical system, as well as an integrated computer system. The main purpose of this research is to develop the new type of actuator which can control the attitude (position and inclination) of a measurement probe. The experimental results show that it is possible to carry mechanically the loads up to 26 kg of the measurement probe during measurement of deep surface. In this paper, the developed actuator’s control strategy has been discussed widely in order to measure the surface parameter successfully..
17. 村上 洋, 甲木 昭雄, 佐島 隆生, Study of a vibrating fiber probing system for 3-D micro-structures: performance improvement, PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 10.1088/0957-0233/25/9/094010, 25, 9, 249-256, 2014.09.
18. 村上 洋, 甲木 昭雄, 佐島 隆生, Simple and simultaneous measurement of five-degrees-of-freedom error motions of high-speed microspindle: Error analysis, PRECISION ENGINEERING-JOURNAL OF THE INTERNATIONAL SOCIETIES FOR PRECISION ENGINEERING AND NANOTECHNOLOGY, 10.1016/j.precisioneng.2013.09.005, 38, 2, 249-256, 2014.04.
19. Md Hazrat Ali, 甲木昭雄, 佐島 隆生, 村上洋, 黒河 周平, Control strategy of developed mechanical actuator in measuring hole surface parameter, International Journal of Advanced Manufacturing Technology, 10.1007/s00170-013-5420-0, 2013.11, This paper presents the control strategy of a new type of mechanical actuator used to help in measuring hole surface parameter. The actuator can carry up to a load of 26 kg during measurement. Often, the measurement unit’s attitude is misaligned due to the force acting on it. Actuator is used in order to control the misalignment of such system during measurement. In this research, the complete measurement system consists of a servo motor, a laser diode, a laser interferometer, an optical system, as well as an integrated computer system. The main purpose of this research is to develop the new type of actuator which can control the attitude (position and inclination) of a measurement probe. The experimental results show that it is possible to carry mechanically the loads up to 26 kg of the measurement probe during measurement of deep surface. In this paper, the developed actuator’s control strategy has been discussed widely in order to measure the surface parameter successfully..
20. Takao Sajima, Hiroshi Murakami , Akio Katsuki, Daisuke Tabuchi, Osamu Ohnishi, Syu!ei Kurokawa, Hiromichi Onikura and Toshiro K. Doi, Precision Profile Measurement System for Microholes Using Vibrating optical Fiber, Sensors & Materials, 24, 7, 387-396, 2012.10.
21. Study on Improvement of pipe bursting strength CFRP molding method using simultaneous heating.
22. D. TABUCHI, T. SAJIMA, T. DOI, H. ONIKURA, O. OHNISHI, S. KUROKAWA and T. MIURA, Development of a Filament-Winding Machine Based on Internal Heating by a High-Temperature Fluid for Composite Vessels, Sensors & Materials, 23, 6, 347-358, 2011.06.
23. Daisuke TABUCHI, Takao SAJIMA, Hiromichi ONIKURA, Osamu OHNISHI, Syuhei KUROKAWA, Toshiro DOI, and Toshiaki OHTA, Development of U-anchor CFRP Rod Manufacturing Machine, Advanced Materials Research, 168, pp.2125-2128, 2010.12.
24. 村上洋、甲木昭雄、鬼鞍宏猷、佐島隆生、近藤英二 , 光ファイバープローブを用いた微小径穴形状精度測定システムの開発(第2報)
―― 試作した測定システムの評価実験 ――
, 精密工学会誌, 76, 8, pp.950-954, 2010.08.
25. Hiroshi MURAKAMI, Akio KATSUKI, Hiromichi ONIKURA, Takao SAJIMA, Norio KAWAGOISHI, Eiji KONDO , Development of a System for Measuring Micro Hole Accuracy Using an Optical Fiber Probe, Journal of Advanced Mechanical Design, Systems, and Manufacturing, 4, 5, pp.995-1004, 2010.05.
26. Hiroshi MURAKAMI, Akio KATSUKI, Hiromichi ONIKURA, Takao SAJIMA, Norio KAWAGOISHI, Eiji KONDO , Development of a System for Measuring Micro Hole Accuracy Using an Optical Fiber Probe, Journal of Advanced Mechanical Design, Systems, and Manufacturing, 4, 5, pp.995-1004, 2010.05.
27. Hiroshi MURAKAMI, Akio KATSUKI, Hiromichi ONIKURA, Takao SAJIMA, Development of a Measuring System for a Micro Hole Using an Optical Fiber Probe, ASPE 23rd Annual Meeting, pp.356-359, 2008.10.
28. Heung-Kil PARK, Hiromichi ONIKURA, Osamu OHNISHI, Takao SAJIMA, Ahmad Sharifuddin, Micro Drilling into Brittle Materials by Chemically Plated Diamond Tools, Proceedings of the 8th euspen International Conference, pp. 465-468, 2008.05.
29. Hiromichi ONIKURA, Osamu OHNISHI, Takao SAJIMA, Development of an Ultrasonic Vibration Spindle with an Aerostatic Bearing for Micro Drilling
, Proc. of the 6th International Conference and 8th general meeting of the european society for precision engineering and nanotechnology, Vol.Ⅰ, pp.317-320, 2006.05.