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横浜国立大学 笠井研究室

   English version

研究内容

                     

The main research consists of nondestructive inspection technologies
for materials and structures, fracture accident prevention technologies,
industrial accidents statistics analyses and risk analysis.

笠井研究室では、各種モニタリング技術、統計的リスク解析技術、リスクベースメンテナンス等の
研究を行っております。

Our research of "Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks" was posted on the website of Advances in Engineering on 27th October.















新しく開発した渦電流プローブによるシミュレーション




赤外線を用いて可燃性ガスを検知する様子。




渦流探傷法で欠陥を検知するシミュレーション①




渦流探傷法で欠陥を検知するシミュレーション②













修了生の就職先

笠井研究室の最近の就職先としては、東京ガス、トヨタ自動車、東北電力、北陸電力、中部電力、三菱重工業、旭硝子、東燃ゼネラル、千代田化工建設、日新製鋼、 などです。OBの就職先の一覧が見たい学生は、笠井のところへおこし下さい。



Our research of "Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks" was posted on the website of Advances in Engineering on 27th October.


My research papers as follows.
[OPEN ACCESS]A novel film eddy current probe having a detection coil interleaved to the excitation coil and the amplified effect by ferromagnetic amorphous alloys particles, Sensors and Actuators: A. Physical, Volume 347, 2022, 113913
[OPEN ACCESS]An eddy current convergence probe with copper core and single detection coil to detect flaws on aluminum plates, NDT & E International, Volume 132, 2022, 102707
The study have applied the use of a copper core as a novel approach to develop eddy current testing probe although ferrite or iron core coils are usually used for this purpose. The following is my personalized Share Link for the research article. This link is no sign up, registration or fees are required.The probe consists of a specially designed copper core, and a strong excitation current was converged at the tip of the copper core for probes to have good the detectability of flaws.
[OPEN ACCESS] https://authors.elsevier.com/a/1fa283RA9ST-oc
[OPEN ACCESS]Application of Machine Learning for Data with an Atmospheric Corrosion Monitoring Sensor Based on Strain Measurements, Metals 12, no. 7: 1179
[OPEN ACCESS]Public acceptance for the implementation of hydrogen self-refueling stations, International Journal of Hydrogen Energy, Volume 46, Issue 72, 2021,Pages 35739-35749
[OPEN ACCESS]エラストマー固定チューナブルコロイドフォトニック結晶フィルムによるひずみの可視化, 色材協会誌, 2021, 94 巻, 9 号, p. 252A
[OPEN ACCESS]Atmospheric Corrosion Sensor Based on Strain Measurement with Active–Dummy Fiber Bragg Grating Sensors, Metals 10 (8), 1076A
[OPEN ACCESS]A Uniform Eddy Current Probe with a Double-Excitation Coil for Flaw Detection on Aluminium Plates, Metals, 2019, 9(10), 1116
[OPEN ACCESS]Flaw Detection in Aluminum Plates Using a Rotating Uniform Eddy Current Probe with Two Pairs of Excitation Coils, Metals, 2019, 9(10), 1069



Real-time aerosol chloride deposition measuring device using a conductivity sensor, Atmospheric Environment, Volume 213, 15 September 2019, Pages 757-766
Simplified approach to evaluating safety distances for hydrogen vehicle fuel dispensers, International Journal of Hydrogen Energy, Volume 44, Issue 33, 5 July 2019, Pages 18639-18647
[OPEN ACCESS]Atmospheric Corrosion Sensor Based on Strain Measurement with an Active Dummy Circuit Method in Experiment with Corrosion Products, Metals
[OPEN ACCESS]The Improvement of Flaw Detection by the Configuration of Uniform Eddy Current Probes (Review Article), Sensors
[OPEN ACCESS]A new analysis of wind on chloride deposition for long-term aerosol chloride deposition monitoring with weekly sampling frequency,Atmospheric Environment
[OPEN ACCESS] Evaluation of Safety Measures of a Hydrogen Fueling Station Using Physical Modeling, Sustainability 2018, 10(11), 3846, (2018)
Barkhausen Noise Measurement System Using a Three-Pole Probe, Journal of Nondestructive Evaluation, (2018)
[OPEN ACCESS]A Robust Fiber Bragg Grating Hydrogen Gas Sensor Using Platinum-Supported Silica Catalyst Film , Journal of Sensors, 2018(1)
[OPEN ACCESS]Development of Amplifier Circuit by Active-Dummy Method for Atmospheric Corrosion Monitoring in Steel Based on Strain Measurement, Metals. 2018; 8(1):5
[OPEN ACCESS]Simulation-based safety investigation of a hydrogen fueling station with an on-site hydrogen production system involving methylcyclohexane, International Journal of Hydrogen Energy
 ・Atmospheric corrosion sensor based on strain measurement, Measurement Science and Technology, 28 (1), 015106
 ・[OPEN ACCESS]Leakage-type-based analysis of accidents involving hydrogen fueling stations in Japan and USA, Volume 41, Issue 46, 14 December 2016, Pages 21564-215705
Mechanism for Corrosion Prevention by a Mechanical Plating of Uniform Zinc-Iron Alloy, Journal of Materials Engineering and Performance, November 2016, Volume 25, Issue 11, pp 4680?4685 ・Predicting maximum depth of corrosion using extreme value analysis and Bayesian inference, International Journal of Pressure Vessels and Piping, 2016
・The qualitative risk assessment of an electrolytic hydrogen generation system, International Journal of Hydrogen Energy 41 (30), 13308-13314, 2016
・Application of risk curve for statistical analysis of backside corrosion in the bottom floors of oil storage tanks, International Journal of Pressure Vessels and Piping 141, 19-25, 2016
・Preliminary hazard identification for qualitative risk assessment on a hybrid gasoline-hydrogen fueling station with an on-site hydrogen production system using organic chemical hydride, International Journal of Hydrogen Energy 41 (18), 7518-7525, 2016
[OPEN ACCESS]Effect of gasoline pool fire on liquid hydrogen storage tank in hybrid hydrogen?gasoline fueling station, International Journal of Hydrogen Energy 41 (3), 2096-2104, 2016
・Degradation of Anticorrosive Organic Coating Applied to Inner Bottom Plate of Oil Storage Tank By a Large Scale Earthquake, Meeting Abstracts, 622-622, 2015
・Risk assessment for a gas and liquid Hydrogen fueling station, AIChE
Study on the effect of elastic stress and microstructure of low carbon steels on Barkhausen noise, Journal of Nondestructive Evaluation., September 2013, Volume 32, Issue 3, pp. 277-285
・Accident occurrence model for the risk analysis of industrial facilities, Reliability Engineering & System Safety, Volume 114, June 2013, Pages 71?74
Development of an Eddy Current Inspection Technique with Surface Magnetization to Evaluate the Carburization Thickness of Ethylene Pyrolysis Furnace Tubes, Journal of Nondestructive Evaluation, Volume 31, Issue 4 , pp 349-356 (2012)
Experimental and Analytical Investigations ofAcoustic Wave Propagation using a Reservoir and an Acoustic Lens, Materials Evaluation, Vol. 70, No.4, pp.470-478.(2012) 
・Experimental and analytical study for detectability of the back-side flaws of flat ferromagnetic plates by RFECT, NDT & E International, Volume 44, Issue 8, December 2011, Pages 703-707
・Quantitative investigation of a standard test shim for magnetic particle testing, NDT & E International, 44(5):421-426 (2011) 
・Propane gas leak detection by infrared absorption using carbon infrared emitter and infrared camera, NDT & E International, 44(1):57-60. (2011)
Detection of carburization in ethylene pyrolysis furnace tubes by a C core probe with magnetization, Journal of Nondestructive Evaluation, Volume: 29, Issue: 3,Pages: 175-180 (2010)
・Correlation between corrosion rate and AE signal in an acidic environment for mild steel, Corrosion Science, Volume 51, Issue 8, Pages 1679-1684 
・Statistical Analysis of Corrosion in the Bottom Floors of Oil Storage Tanks (Second Report) Report on the directed percolation simulation for corrosion in the bottom floors of oil storage tanks and its application, Journal of High Pressure Institute of Japan, Vol. 46 (2008), No. 4, pp.237-244 
・Evaluation of back-side flaws of the bottom plates of an oil-storage tank by the RFECT. NDT & E International, 2008. 41(7): pp. 525-529.
・Detection of fatigue damage accumulation and hydrogen embrittlement in 7075 alloy by the eddy current method, Journal of High Pressure Institute of Japan, 44(5),pp.10-16(2006)
・Residual Magnetic Flux Leakage Technique for Surface Flaws with the Magneto - Impedance Sensor and Wavelet Analysis, Journal of High Pressure Institute of Japan, 44(1),pp.47-54(2006)
・Influence of corrosion products on magnetic flux leakage signals in inspection of far-side metal-loss defects in oil storage tank bottom floors, Jpn. Petrol. Inst., 47 (1), pp.19-26 (2004)
・Non-destructive Evaluation Method for Far-side Corrosive Type Flaws in Oil Storage Tank Bottom Floors Using the Magnetic Flux Leakage Technique, J. Jpn. Petrol. Inst., 46(2), pp.126-132(2003)

You can find my research papers in following URL for nondestructive testing.





We previously proposed a statistical risk analysis method for accidents at industrial facilities
by using a risk curve to show the relationship between the cumulative frequencies and
the damage magnitude of the accidents on a log-log scale.