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    • 6. 发明专利
    • POSITION LOCATING SYSTEM FOR FALLING ROCK SOURCE
    • JPH09280906A
    • 1997-10-31
    • JP2164297
    • 1997-02-04
    • UJIHIRA MASUYUKITANABE TATSUHIKO
    • UJIHIRA MASUYUKITANABE TATSUHIKO
    • E01F7/04G01D21/00G01V1/00
    • PROBLEM TO BE SOLVED: To provide a position locating system of a falling rock source which enables two-dimensional positional location of a peeling sound of an unstable rock body from a base, the position at which a small breaking sound of a rock supporting the rock body is generated, the position of the rock from a structural body contacting the slope of a rock bed and furthermore, a falling course thereof. SOLUTION: This system is provided with a plurality of cable sensors 11 which are arranged in a lattice on a slope 10 to be located and detects vibration by a falling rock source to output a voltage, an amplifier 14, a filter 15, an A/D converter 16 and a data processor 17 to execute a desired calculation using digital information inputted from the A/D converter 16. Amplitude values which are calculated by the data processor 17 from outputs, of two cable sensors 11 orthogonal to each other at an intersection at a desired moment are multiplied per the intersection of the cable sensors 11 arranged in a lattice. A topography of the intersections in a desired range in which the multiplied value is taken on the Z axis and the positions of the intersections are taken on the X and Y axes is outputted onto a screen or a paper. Thus, the position and the size of a vibration source are located by the analysis of images.