UNDERGROUND RADAR APPARATUS AND UNDERGROUND EXCAVATOR PROVIDED WITH THE SAME

PROBLEM TO BE SOLVED: To obtain an underground radar apparatus which is constituted simply and at low costs by reducing an interference inside a channel and an interference between channels and which can detect a nearby region and to obtain an underground excavator which is provided with the undergr...

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Bibliographic Details
Main Authors KAKIZAKI YUJI, HIRAHARA TETSUYA, ISHII KEIJIRO, SUZUKI MORIO, NOZU TOSHIMITSU
Format Patent
LanguageEnglish
Published 27.02.2001
Edition7
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETECTING MASSES OR OBJECTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
LARGE UNDERGROUND CHAMBERS
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
MINING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
SHAFTS
TESTING
TUNNELS
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Summary:PROBLEM TO BE SOLVED: To obtain an underground radar apparatus which is constituted simply and at low costs by reducing an interference inside a channel and an interference between channels and which can detect a nearby region and to obtain an underground excavator which is provided with the underground radar apparatus. SOLUTION: This underground radar apparatus is provided with transmitting- receiving antennas AT1 to AT4, in even numbers, which are arranged in the circumferential direction of a cylindrical body such as a structure body P for an underground excavator by a nonexcavation drilling method of construction. The underground radar apparatus is provided with a transmission part which supplies a transmission signal in such a way that the transmission signal supplied to the adjacent transmitting-receiving antennas AT1 to AT4 simultaneously keeps a relationship of opposite polarities. The underground radar apparatus is provided with a reception part which adds reception signals from the respective transmitting-receiving antennas and which extracts reflected waves from the added reception signals.
Bibliography:Application Number: JP20000142293