Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Public Transportation in evolution---New ideas for more comfortable and convenient train rides

14.02.2008
Prof.Yoshiyasu Takefuji was the first person with the idea of camera-equipped cellular phones using satellites and is now taking on the challenge for new public transportation services with unique ideas including floors for passengers to generate electricity, speakers for noisy stations and GPS inside trains.

Taking on the challenge for new public transportation services with an academic-industrial alliance, with unique ideas that break down stereotyped thinking

About three years ago, when Prof. Takefuji, who specializes in network security and neural network (information processing mechanism modeled on human brain structure) met with the president of JR East at a meeting, the two found themselves as kindred spirits as soon as they met. Prof. Takefuji revealed his research ideas related to railway services, such as the "electricity generating floor" and "transverse wave speaker", and an academic-industrial alliance was decided on at the spot. In cooperation with JR East Consultants Company, many projects are under way towards a railway service that is universally user-friendly.

"Electricity generating floor" enables passengers to generate electrical power at stations

At stations in the center of town, many people come and go. Can't this enoumous amount of transfer energy be used to generate electricity? Research of the "electricity generating floor" started from such a unique idea, and is based on the research by Kohei Hayamizu (1st year level at the the Graduate School of Media and Governance), Prof. Takefuji's student, to generate electrical power with sound wave and vibration. Kohei was only an elementary student when a science class led him to come up with the idea of using sound to generate electrical power, and started to study this seriously when he was in second year level at university.

The key technology of the "electricity generating floor", which generates electricity using vibration when someone steps on the floor, is piezoelectric element. The device, which charges electricity when pressure is applied and modifies when energized, has been used in piezoelectric speakers, but never to generate electricity. Therefore, a device with a higher power generating effeciency was co-developed with Kyocera specifically for this project. In October 2006, an experiment started at the Marunouchi North Gate of JR Tokyo station to test electricity generating power and durability. In the future, the plan is to supply electrical power for escalators and lights with the "electricity generating floor", aiming for environmentally-friendly railways and stations.

"Transverse wave speaker" can give clear sounds in noisy places

Sound waves and electromagnetic waves can be divided into two types, the longitudinal wave and transverse wave, depending on direction of the wave and its vibration direction. It has been widely understood that sound waves we normally hear are longitudinal waves, that come to our ear by vibration of air. However, electromagnetic waves that are transverse waves can also be recognized as "sound"----- Prof. Takefuji found out about "transverse wave speakers" through inventor Takeshi Teragaki in 2004. Moreover, transverse wave sounds had outstanding features such as "can be heard well in noisy places", "can be heard clearly even from far away", and "can be heard by people without eardrums". Soon, Prof. Takefuji started his own research on transverse wave speakers. Today, he is trying to develop a speaker that can be heard clearly to all passengers on noisy trains and in stations.

Highly accurate GPS system can be the only way to provide information to local unmanned stations

Surprisingly, in the past, there was no way to precisely keep track of the location of trains between stations, because people understood that using low-intesity waves of GPS for location measurement is not possible in and near trains. However, Prof. Takefuji proved in an experiment on the JR Chuo Honsen that by adding up radio waves that have cyclic patterns, GPS works inside trains. Since February 2006, an experimental operation of travel information service using PVT*, a highly accurate GPS system developed by the U.S. military, is underway at JR Hachiko line, which has many unmanned stations. By adopting this system, operational information and announcement of train arrival can be provided phonetically or visually, and can also be useful in times such as when trains are not on schedule.

*PVT (Position, Velocity, Time)
Normal GPS only has location information, whereas PVT provides information of location, speed and standard time.
Prof.Yoshiyasu Takefuji,
Professor, Faculty of Environment and Information Studies, Keio University
Prof. Takefuji finished the Graduate School of Science and Technology in 1983 with a Ph.D. in electrical Engineering. He served as visiting assistant professor at the Computer Science and Engineering department of the University of South Florida, tenured associate professor at the electrical engineering department of the Case Western Reserve University before becoming professor at Keio University. He has written several books for the public, such as "Let's look into the future world of cellular phones" (Iwanami Shoten), and "Story about security that you must know for yourself" (Nikkei BP). He is also known as the first one in the world to come up with the idea of camera-equipped cellular phones using satellite technology.
For more information or to contact Prof.Yoshiyasu Takefuji, please email info@researchsea.com or

Keio University Office of Communications and Public Relations m-koho@adst.keio.ac.jp

Center for Research Promotion | ResearchSEA
Further information:
http://www.keio.ac.jp/english/keio_in_depth/research/005.html

More articles from Transportation and Logistics:

nachricht Laser rescue system for serious accidents
29.11.2016 | Laser Zentrum Hannover e.V.

nachricht Bremen University students reach the final at robotics competition with parcel delivery robot
19.10.2016 | BIBA - Bremer Institut für Produktion und Logistik

All articles from Transportation and Logistics >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>