1. Home
  2. Honda R&D Technical Review Vol.21 N...
  3. Hydrogen Visualization Using Multi-...

Technical Review e-Book: Summary

Hydrogen Visualization Using Multi-photon Ionization

Article of Honda R&D Technical Review Vol.21 No.1


Research has been conducted on a hydrogen visualization technology in order to provide support to the process of research and development on fuel cell vehicles by “making invisible hydrogen visible.” The project eschewed conventional approaches such as indirect measurement of hydrogen using chemical sensors or substitute gases. Instead, it attempted to directly detect hydrogen, and to enable visualization of the state of diffusion of hydrogen in space.
The use of a laser was selected from among a variety of hydrogen detection methods, as its use is considered to be effective in detection at low concentrations. The project focused on a principle by means of which, contrary to conventional fluorescence analysis, fluorescence would occur even if the laser light for excitation did not match the absorption wavelength, and proposed a theory for hydrogen detection.
Results confirmed that the use of the principle of multi-photon ionization enabled direct fluorescence and detection of hydrogen. In addition, results suggested that the technology has the potential to be employed to visualize the changes in the state of diffusion of hydrogen in space as the flow rate changes, enabling analysis and measurement of the state of hydrogen diffusion.


(1) WO 2006/006628 A1
(2) Seller, R. G., Wang, D.: Assessment of Remote Sensing Technologies for Location of Hydrogen and Helium Leaks, NASA, NAG10-0290 (2000)
(3) LuVan, M., Mainfray, G., Manus, C., Tugov, I.: Multiphoton Ionization of Atomic and Molecular Hydrogen at 0.53μ, Physical Review. A, Vol. 7, Issue 1, p. 91-98 (1973)
(4) Weyl, G. M.: Physics of Laser-Induced Breakdown: An Update, Laser-Induced Plasmas and Applications, Marcel Dekker, p. 1-59 (1989)
(5) Hori, M.: Proof of Principle Experiment, University of Tokyo, 11p. (2003-2005)

Author (organization or company)

Masahiro FUKUTA(Automobile R&D Center)、Ryugo HAYANO(東京大学)、Masaki HORI(東京大学)、Hideo NOBUSUE(Automobile R&D Center)、Takatsugu KOYAMA(Automobile R&D Center)、Jun TANAKA(Automobile R&D Center)

We would like to get your opinion on this research paper. (This is only applicable to registered members.)

The readers of this research paper have also selected these research papers.

Control Method to Reduce Degradation in Fuel Cell System at Start-up
Article of Honda R&D Technical Review Vol.24 No.2
Research of Simulation Method of Hydrogen Diffusion for Fuel Cell Electric Vehicle Development
Article of Honda R&D Technical Review Vol.23 No.1
Visualization of Liquid Water Distribution in Fuel Cell by Using Neutron Radiography
Article of Honda R&D Technical Review Vol.23 No.1