| Project/Area Number |
07555163
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
水工水理学
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| Research Institution | kagoshima University |
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Principal Investigator |
SATO Michio KAGOSHIMA UNIV., FACULTY OF ENG., PROF., 工学部, 教授 (40005450)
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| Co-Investigator(Kenkyū-buntansha) |
KANDA Nobuyuki TOKYO KEISOKU CO.LTD,HEAD ENGINEER, 技術部長
NISHI Ryuichro KAGOSHIMA UNIV., FACULTY of ENG.RESEARCH ASSOC., 工学部, 助手 (30189253)
ASANO Toshiyuki KAGOSHIMA UNIV., FACULTY of ENG.ASSOC.PROF., 工学部, 助教授 (40111918)
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| Project Period (FY) |
1995 – 1997
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| Project Status |
Completed (Fiscal Year 1997)
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| Budget Amount *help |
¥13,800,000 (Direct Cost: ¥13,800,000)
Fiscal Year 1997: ¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥5,400,000 (Direct Cost: ¥5,400,000)
Fiscal Year 1995: ¥6,400,000 (Direct Cost: ¥6,400,000)
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| Keywords | TRANSPORTABLE / WAVE MEASUREMENT / MULTIPLE DEPLOYMENT / MEASUREING SYSTEM / COAST / FIELD OBSERVATION / ELECTROMAGNETIC CURRENT METER / COASTAL AREA WITH NO OBSERVATION PIERS |
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| Research Abstract |
An appratus for the measurement of waves and currents in near-shore area was designed and fabricated. Through our experience of field measurements, we have had ideas that the instruments should be transportable by one or two persons and free from cables connecting them to recording or power supplying devices for safe and easy doployment, and that they should be unnecessary to open the lid of the case which houses the electronic unit to change recording media or battery. Moreover, each one of multiple apparatuses deployed in array must enable us to make synchronized measurements so that we can obtain simultaneous data, although they are completely separated electrically. The apparatus consists of the following units ; 1.measuring.unit, 2.power supplying unit, 3.recording unit, 4.control unit, 5.communication branch unit.
The measuring unit is composed of a pressure gauge and an electromagnetic current meter. The measurable range of the EMCM is (]SY.+-。[)3.0m/s ((]SY.+-。[)1.5V). The signa
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ls are stored in memory together with the magnetic bearings taken with a compass, then they are written on PCMCIA flash ROM.The power source is a sealed lead acid battery with capacity of 12V25Ah. All parts of this unit are housed in a watertight and pressure resistant stainless steel case. Prior to station the apparatus, control data and measuring schedule are written on the ROM f the outside of the case without electrical contact through infra-red communication port using an optical data communication module which is connected to a portable computer. The measured data is also withdrawn by using the optical communication module. The transmission rate is 115Kbit/s and it takes about 13 minutes to transmit data of four megabytes. In order to obtain simultaneous data using multiple apparatuses, a multiple branch communication unit is used to transmit control signals and measuring schedule, and to start up counting clock pulses. Test results of the apparatuses at Fukiage beach were satisfactory. Less
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