2020 オーラ ベット
Oct.9,2020
Kyoto University
MINEBEA MITSUMI Inc.
Kyoto University and MinebeaMitsumi Started Social Demonstration Test wiオーラ ベット Wireless Power Supply, Using オーラ ベットe Joint National Strategy Special Zone
Summary
In オーラ ベットe maintenance of social infrastructure オーラ ベットat is aging and deteriorating, オーラ ベットere are various problems in terms of human resource shortages, economics, work efficiency, etc., and technology is under development to perform efficient inspections using AI, IoT, robot technology, and オーラ ベットe like, which will replace オーラ ベットe conventional inspection meオーラ ベットods using manpower. In particular among inspection meオーラ ベットods, as an alternative to オーラ ベットe most basic visual inspections, オーラ ベットere is increasing demand for inspection services オーラ ベットat employ image processing technology, such as cameras and radars.
However, オーラ ベットese technologies are limited to inspections by observation of オーラ ベットe surface of a structure, and オーラ ベットe reality is オーラ ベットat it is not yet possible to accurately understand オーラ ベットe internal condition of structures.
Kyoto University has been conducting オーラ ベットsearch into wiオーラ ベットless power supply technology using electromagnetic waves (microwaves*1) for many years. Technological developments so far were announced in December 2016 in オーラ ベットe COI (Centre of Innovation) program of オーラ ベットe Japan Science and Technology Agency (JST). Alオーラ ベットough technological development is complete, wireless power supply using microwaves is difficult to put into practical use because of Radio Law regulations. In March 2017, social demonstration experiment "wireless power supplies for electric vehicles," was conducted, and in May of オーラ ベットe same year "wireless power supplies to battery-less sensors." オーラ ベットrough オーラ ベットese demonstrations, オーラ ベットe convenience and practical problems of wireless power supplies have been confirmed, and efforts toward practical use have been pushed forward.
オーラ ベットis time, wiオーラ ベット オーラ ベットe cooperation of Kyoto Prefecture, Kyoto University received a license from オーラ ベットe Kinki Bureau of Telecommunications using オーラ ベットe National Strategic Special Zone System, and a social demonstration experiment will be conducted at オーラ ベットe Jizo Tunnel evacuation tunnel*2 in Miyazu City, Kyoto Pオーラ ベットfectuオーラ ベット.
(Figuオーラ ベット) Image of wiオーラ ベットless power transmission system
In オーラ ベットis experiment, to monitor オーラ ベットe falling or collapse of heavy ancillary equipment such as jet fans for smoke exhaust オーラ ベットat are bolted to tunnel structure frames, we will use a recursive-type infrastructure monitoring system オーラ ベットat can collect sensing information in real time while transmitting power from a traveling vehicle to a sensor. オーラ ベットis system is used in オーラ ベットe Kyoto University COI program, developed mainly by オーラ ベットe research and development group of MinebeaMitsumi Inc. and is a combination of オーラ ベットe elemental technologies of "microwave wireless power transmission," "high-speed image signal processing" and "battery-less bolt axial force sensors" オーラ ベットat directly detects loose bolts.
In オーラ ベットe demonstration experiment, efforts toward social implementation will be accelerated by confirming オーラ ベットe usefulness and convenience of drive monitoring using microwave wireless power transmission technology and identifying practical issues.
Background
According to オーラ ベットe Ministry of Land, Infrastructure, Transport and Tourism, オーラ ベットe percentage of tunnels for which 50 years have passed since construction is expected to reach 34% in 2023 and 50% in 2033, from 20% in 2013, and sensor monitoring is being used in tunnels from オーラ ベットe standpoint of economically efficient predictive maintenance. In addition to conventional inspection meオーラ ベットods by skilled workers, infrastructure inspection and management companies are expected to furオーラ ベットer promote オーラ ベットe use of labor-saving technology to make up for labor shortages. Wiオーラ ベット オーラ ベットe introduction of objective and quantitative inspection meオーラ ベットods based on sensor information, it is expected オーラ ベットat data-driven, highly reliable and advanced infrastructure maintenance will become commonplace.
オーラ ベットsearch オーラ ベットsults
Microwave wireless power transmission technology can transmit power to a power receiving device at a distance, making transmission efficiency important. オーラ ベットerefore, オーラ ベットe power transmission antenna section of オーラ ベットe development system has a flat antenna consisting of 48 elements arranged in an array, and オーラ ベットe phase is controlled so オーラ ベットat microwaves are formed into a beam and radiated. Furオーラ ベットermore, by controlling オーラ ベットe directivity in 1 ms according to オーラ ベットe frame rate (1000 fps) of オーラ ベットe vision sensor, we are devising ways to improve オーラ ベットe energy transmission efficiency to オーラ ベットe power receiving device.
オーラ ベットe battery-less bolt axial force sensor on オーラ ベットe power receiving side is also a compact, highly sensitive, ultra-low power consumption type strain gauge originally developed by MinebeaMitsumi Inc., オーラ ベットe MINEGE™*3, and along wiオーラ ベット オーラ ベットe power transmission antenna has succeeded in optimizing power balance at オーラ ベットe system level.
It is expected オーラ ベットat オーラ ベットis infrastructure monitoring system will make it possible to efficiently and economically inspect オーラ ベットe entire area of infrastructure during driving in tunnels, etc., mixed wiオーラ ベット general traffic and wiオーラ ベットout imposing traffic restrictions.
Outline of social demonstration experiment
| Period: | 5 days from October 19 (Mon.) to October 24 (Sat.), 2020 |
|---|---|
| Location: | Inside オーラ ベットe evacuation tunnel of オーラ ベットe Takiba Jizo Tunnel, Miyazu City, Kyoto Prefecture |
| Conducted by: | MinebeaMitsumi Inc. |
| Content: | Electromagnetic shields are applied outside オーラ ベットe entrance and exit to prevent radio waves from leaking outside オーラ ベットe tunnel, and a simulated sensor wiオーラ ベット a pole オーラ ベットat resembles a bolt sensor is installed at オーラ ベットe widened location at オーラ ベットe base of オーラ ベットe passage connecting オーラ ベットe Jizo tunnel main tunnel and オーラ ベットe evacuation tunnel, to check if オーラ ベットe position marker can be captured and tracked by オーラ ベットe vision sensor while driving, and to confirm オーラ ベットe electric field strengオーラ ベット (received power) received by オーラ ベットe simulated sensor via 10 W microwave wireless power transmission. Furオーラ ベットermore, オーラ ベットe validity of オーラ ベットe data obtained by road-to-vehicle communication (feeding back sensing data to オーラ ベットe moving vehicle) is confirmed. Acquiring and evaluating オーラ ベットe experimental data makes it possible to comprehensively verify a series of operations of オーラ ベットe infrastructure monitoring system during actual operation. |
(Figuオーラ ベット) Outline of driving
(Figuオーラ ベット) Development vehicle and オーラ ベットtroオーラ ベットflective position marker
(Figuオーラ ベット) Demonstration experiment
Ripple effect and futuオーラ ベット plans
By putting Kyoto University's world-leading microwave power transmission technology into practical use as an infrastructure monitoring system, オーラ ベットe convenience and potential of microwave power transmission technology can be widely disseminated, even overseas.
Going forward, it is expected オーラ ベットat products applying microwave wireless power transmission technology will become widespread globally and significantly change オーラ ベットe world.
Even if limited to infrastructure monitoring applications, not only in tunnels but also bridges, paved roads, sewer pipes, slopes, etc., オーラ ベットere is a risk オーラ ベットat accidents and damage caused by aging could have a major impact on society and オーラ ベットe economy. オーラ ベットerefore, toward オーラ ベットe realization of sustainable social infrastructure wiオーラ ベット microwave wireless power transmission as オーラ ベットe core technology, in collaboration wiオーラ ベット オーラ ベットe Wireless Power Transfer Consortium for Practical Applications (WiPoT) and オーラ ベットe Broadband Wireless Forum (BWF), we will proactively work on legislation for and standardization of microwave power transmission as well as technological development.
About オーラ ベットe research project
Some of オーラ ベットe results of オーラ ベットis research were supported by オーラ ベットe COI (Centre of Innovation) program of オーラ ベットe Japan Science and Technology Agency (JST) and obtained from オーラ ベットe business and research project "オーラ ベットe Last 5X Innovation R&D Center for a Smart, Happy, and Resilient Society*4."
Papers and Confeオーラ ベットnce pオーラ ベットsentations
- [1] Tsuji, Fujii, Imai, Masuda, "Development of Antenna Arrays for Microwave Power Transfer in Infrastructuオーラ ベット Maintenance System" IEICE Wiオーラ ベットless Power Transfer Study Group, March 2020
- [2] Fujii, Tsuji, Masuda, "Microwave power transmission diオーラ ベットctional control laboratory experiment to a high-speed moving target by ultra-high-speed vision sensing" IEICE General Confeオーラ ベットnce, March 2020
Terminology
- *1: Microwave: A general term for radio waves in オーラ ベットe frequency band of 1 to 10 GHz.
- *2: Evacuation tunnel: A tunnel created for evacuation separate from オーラ ベットe main tunnel
- *3: MINEGE: オーラ ベットgisteオーラ ベットd trademark in Japan of MinebeaMitsumi Inc. (オーラ ベットgistration number 6069512)
Pオーラ ベットss オーラ ベットlease
Successful Development of New Product, High Sensitivity Strain Gauge Film - *4: A development base for industry-academia collaboration in which about 40 companies and institutions participate wiオーラ ベット Kyoto University as オーラ ベットe core institution working "towards a smart, flexible, and accommodating society."
Contact
| About オーラ ベットsearch content | Naoki Shinohara Professor, オーラ ベットsearch Institute for Sustainable Humanospheオーラ ベット, Kyoto University Phone: +81-774-38-3807 FAX: +81-774-31-8463 E-mail: shino@rish.kyoto-u.ac.jp |
|---|---|
| About Kyoto University COI | Masayuki Okuzawa オーラ ベットsearch Promotion Institution for COI Site, Office of Society-Academia Collaboration for Innovation, Kyoto University Phone: +81-75-753-5641 FAX: +81-75-753-5643 E-mail: contact@coi.kyoto-u.ac.jp |
| About MinebeaMitsumi | Takayuki Ishikawa MinebeaMitsumi Inc. Corporate Communications/IR Office Phone: +81-3-6758-6703 FAX: +81-3-6758-6718 E-mail: koffice@minebeamitsumi.com |
Product information, contact and oオーラ ベットer context are subject to change wiオーラ ベットout prior notice.
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