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DRILL HEAD FOR UNDERGROUND EXCAVATION, DRILL DEVICE FOR UNDERGROUND EXCAVATION, HAVING DRILL HEAD, METHOD FOR DETECTING OBJECT DURING UNDERGROUND EXCAVATION, AND USE OF DIRECT DIGITAL SYNTHESIZER AS SIGNAL IN DETECTION OF OBJECT DURING UNDERGROUND EXCAVATION
DRILL HEAD FOR UNDERGROUND EXCAVATION, DRILL DEVICE FOR UNDERGROUND EXCAVATION, HAVING DRILL HEAD, METHOD FOR DETECTING OBJECT DURING UNDERGROUND EXCAVATION, AND USE OF DIRECT DIGITAL SYNTHESIZER AS SIGNAL IN DETECTION OF OBJECT DURING UNDERGROUND EXCAVATION
PROBLEM TO BE SOLVED: To provide a drill head capable of being used to correct a direction of travel of a drill device by detecting an object, which becomes a hindrance to excavation during underground excavation, so as to detect the direction and distance of the obstacle.SOLUTION: A drill head 1 for underground excavation is used for a horizontal drill device. The drill head for underground excavation includes a housing, a transmitter for generating a radio signal, an antenna 7, and a receiver 8 for receiving the reflected radio signal. The transmitter includes a direct digital synthesizer.SELECTED DRAWING: Figure 4
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