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    • 10. 发明专利
    • CRUSTAL ALTERNATION OBSERVING DEVICE
    • JPH07209433A
    • 1995-08-11
    • JP72194
    • 1994-01-10
    • MATSUSHITA ELECTRIC IND CO LTD
    • YAMAUCHI KENICHIRO
    • G01V1/36
    • PURPOSE:To automatically remove the noise of a band of 1.6mHz-0.2mHz from a crustal alternation data when the crustal alternation data is collected. CONSTITUTION:A distortion data 20 obtained by a strain gauge 11 and a distortion data collecting device 12 is outputted from a frequency decomposing device 16 and a data correcting device 18. The frequency decomposing device 15 frequency-decomposes the distortion data 20 and outputs the result to a data base device 17, and a trigger signal 23 detected by a barometer 14, a barometric data collecting device 14 and a trigger device 15 is outputted to the data base device 17 and the data correcting device 18. The data base device 17 outputs a noise frequency data 24 for correcting the distortion data 20 on the basis of the frequency component of the distortion data 20 and the trigger signal 23. The corrected data 25 from which the noise is removed in the data correcting device 18 is recorded in a recording device 19. When a sensor device 31 detects the opening and closing of a door in a dugout, a door opening and closing signal 32 is outputted to the trigger device 15 and the data base device 17 to improve the precision of the trigger signal 23.