Title:
NEGATIVE PRESSURE WAVE GENERATOR
Document Type and Number:
Japanese Patent JP2018115480
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To exactly calculate a timing of a micro barometric wave radiated from a tunnel exit.SOLUTION: A negative pressure wave generator 1 reduces the pressure of a micro barometric wave Wradiated from a mine mouth 21 of a tunnel 2 by means of a negative pressure wave W, and includes a negative pressure wave generation means 11 capable of radiating the negative pressure wave W, compression wave passing detection means 12 which detects passing of a compression wave Wthat generates in the tunnel 2 and transmits from one side to the other side, compression wave condition detection means 12 which detects the condition of the compression wave Wat the detection by the compression wave passing detection means 12, and control means 13 which controls operations of the negative pressure wave generation mean 11 on the basis of a detection results detected by the compression wave passing detection means 12 and the compression wave condition detection means 12.SELECTED DRAWING: Figure 1
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Inventors:
TAKEI YOSHIKO
KUDO TOSHIFUMI
YAMAMOTO KENTA
KIMURA NORIYUKI
GOTO TAKASHI
YAMAMOTO TATSUYA
KUDO TOSHIFUMI
YAMAMOTO KENTA
KIMURA NORIYUKI
GOTO TAKASHI
YAMAMOTO TATSUYA
Application Number:
JP2017007015A
Publication Date:
July 26, 2018
Filing Date:
January 18, 2017
Export Citation:
Assignee:
MITSUBISHI HEAVY IND MACH SYSTEMS LTD
HIGASHI NIPPON RYOKAKU TETSUDO
HIGASHI NIPPON RYOKAKU TETSUDO
International Classes:
E21F17/00; E01F8/00; G10K11/178
Domestic Patent References:
| JPH04182502A | 1992-06-30 | |||
| JPH09228786A | 1997-09-02 | |||
| JPH05209405A | 1993-08-20 | |||
| JP2014105482A | 2014-06-09 |
Foreign References:
| WO2009057852A1 | 2009-05-07 |
Attorney, Agent or Firm:
Toshiro Mitsuishi
Mitsuishi Shunpei
Yasuyuki Tanaka
Hiroshi Matsumoto
Tetsuzo Yamada
Mitsuishi Shunpei
Yasuyuki Tanaka
Hiroshi Matsumoto
Tetsuzo Yamada