Title:
FALLING ROCK-DETECTING APPARATUS
Document Type and Number:
Japanese Patent JP3403953
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an apparatus for highly accurately detecting a falling rock state of a dangerous region so as to predict and alarm a landslide disaster beforehand.
SOLUTION: The apparatus consists of a transmitting means 4 for microwaves and a receiving means 5 for microwave beams from the transmitting means. A monitor means is counterposed so that the microwave beams are disturbed by a falling rock 3 to be detected. A signal-processing means 6 detects a generation state of the falling rock 3 on the basis of a level change of a reception signal of the microwave beams.
Inventors:
Shigeru Tamaki
Shuji Mochizuki
Tsuyoshi Hamada
Takayuki Shibuya
Shuji Mochizuki
Tsuyoshi Hamada
Takayuki Shibuya
Application Number:
JP30306098A
Publication Date:
May 06, 2003
Filing Date:
October 23, 1998
Export Citation:
Assignee:
Yokogawa Electronics Co., Ltd.
International Classes:
G01D21/00; G01S13/52; G06M7/00; (IPC1-7): G01D21/00; G01S13/52; G06M7/00
Domestic Patent References:
| JP56157862A |
Other References:
【文献】特許2735069(JP,B2)
Attorney, Agent or Firm:
Masatake Shiga (9 outside)