Takao Sajima
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View article: Development of a High-Function Fiber Stylus for Microstructure Measurement with Water-Repellent and Antistatic Coatings
Development of a High-Function Fiber Stylus for Microstructure Measurement with Water-Repellent and Antistatic Coatings Open
The precise measurement of microstructures and other micron-sized materials has garnered considerable interest in recent years. We have developed a measurement system that uses an etched small diameter optical fiber as a stylus to measure …
View article: Development of a Sharp-Tipped L-Shaped Stylus for Measurement of Nanoscale Sidewall Features
Development of a Sharp-Tipped L-Shaped Stylus for Measurement of Nanoscale Sidewall Features Open
This paper presents a system for measuring nanoscale sidewall features using an L-shaped stylus with a sharp tip. By sharpening the tip of the stylus to the nanometer scale, it is possible to measure nanoscale sidewall features. The stylus…
View article: Development of the contact detection method in free-form surface of the optical fiber probe for microstructure measurement using long short term memory
Development of the contact detection method in free-form surface of the optical fiber probe for microstructure measurement using long short term memory Open
We have been developing a measurement system for microstructures using a small-diameter optical fiber probe. The contact detection method using a threshold value may cause a large error due to the time lag between the real contact time and…
View article: Investigation of Factors Affecting Sensitivity Enhancement of an Optical Fiber Probe for Microstructure Measurement Using Oblique Incident Light
Investigation of Factors Affecting Sensitivity Enhancement of an Optical Fiber Probe for Microstructure Measurement Using Oblique Incident Light Open
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 obli…
View article: Influence of Coating in Square End Mill Using In-Process Tool Wear Detection Based on Electrical Contact Resistance
Influence of Coating in Square End Mill Using In-Process Tool Wear Detection Based on Electrical Contact Resistance Open
In this paper, a method using electrical contact resistance to monitor in-process tool wear is proposed. The high-speed tool wear detection system uses the contact resistance between the tool and workpiece as an indicator to monitor the pr…
View article: Fundamental Study on Electrochemical Mechanism between Adjacent Paint Coating Defects of Common Carbon Steel
Fundamental Study on Electrochemical Mechanism between Adjacent Paint Coating Defects of Common Carbon Steel Open
塗装鋼構造物において，雨水が滞水する部位や結露する部位では，複数の塗膜傷部が電気的に短絡することで，相互干渉しながら腐食が進行する．本研究では滞水環境を対象として，径の異なる塗膜傷間が相互干渉する場合の鋼材電気化学機構を検討することを目的とした．そのために，複数の電極を有するモデル試験体を製作して，その電極間の腐食電流を測定した．この測定結果から径の異なる電極が存在する場合には，径の大きい側と小さい側の電極がそれぞれアノードとカソードに固定されることで，腐食が進行することを…
View article: Fabrication of a fiber probe using a CO2 laser for microstructure measurement: High functionality and durability test
Fabrication of a fiber probe using a CO2 laser for microstructure measurement: High functionality and durability test Open
In recent years, the importance of measuring microstructures of mechanical microparts, micro holes, etc. has increased due to advances in microfabrication technology. Specifically, several microstructure measurement methods have been propo…
View article: Fabrication of Ultra-Small-Diameter Optical-Fiber Probe Using Acid-Etch Technique and CO<sub>2</sub> Laser for 3D-Micro Metrology
Fabrication of Ultra-Small-Diameter Optical-Fiber Probe Using Acid-Etch Technique and CO<sub>2</sub> Laser for 3D-Micro Metrology Open
This paper presents a system for measuring a 3D microstructure using an optical-fiber probe. A stylus shaft was fabricated using an acid-etch technique.We investigated the process of fabricating a stylus tip using an adhesive method, an ar…
View article: In-Process Tool Wear Detection of Uncoated Square End Mill Based on Electrical Contact Resistance
In-Process Tool Wear Detection of Uncoated Square End Mill Based on Electrical Contact Resistance Open
This paper presents a method for in-process detection of tool wear in square end mills. The developed high-speed tool wear detection system uses the contact resistance between the tool and workpiece as a gauge to monitor the progression of…
View article: Development of Touch Probing System Using a Fiber Stylus
Development of Touch Probing System Using a Fiber Stylus Open
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 m…
View article: Reduction of Liquid Bridge Force for 3D Microstructure Measurements
Reduction of Liquid Bridge Force for 3D Microstructure Measurements Open
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 measu…
View article: Historic Machine Tools of Kyushu University
Historic Machine Tools of Kyushu University Open
The Kyushu University has historic machine tools which are kept in a temporary storage location. On the other hand, historical machines of Kumamoto University are kept in a historical workshop. The machines and the workshop are designated …