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    • 24. 发明专利
    • ORIENTATING DEVICE OF POSITION OF SOUND SOURCE IN PRESSURE VESSEL
    • JPS5987357A
    • 1984-05-19
    • JP19756182
    • 1982-11-12
    • HITACHI LTD
    • MIYATA KENJIYAMADA KIMIOSENOO MAKOTOIDEUMI SHIGERU
    • G21C17/04G01N29/14
    • PURPOSE:To discriminate a known sound source which an unknown sound source is close to, by using weight functions depending upon lengths from sound sources and sensors to obtain weighted variance values of differences of sound arrival time between known and unknown sound sources for respective sensors and using these values as indexes of resemblance. CONSTITUTION:When a computer 101 is started, output signals of amplifiers 101-10N are sampled at a proper period and are stored in a storage device 120. Comparators are provided for amplifiers, and the computer monitors whether each detection signal exceeds a set level or not simultaneously with sampling operation of data; and if it exceeds the set level, it is reported to the computer by an interrupt signal from the comparator. When the computer detects the generation of an abnormal sound, it stops data sampling. At this time, this data is stored in the storage device, and indexes of an unknown sound source to K-number of known sources are calculated on a basis of this data, and a minimum index is searched from K-number of indexes, and its number is displayed. As the result, the known sound source which the unknown sound source is close to is discriminated, and an accurate position of a foreign matter is detected.
    • 29. 发明专利
    • INNER TUBE MOVING BODY POSITIONING DEVICE
    • JPS61192619A
    • 1986-08-27
    • JP3270585
    • 1985-02-22
    • HITACHI LTD
    • IDEUMI SHIGERUSUZUKI MASANORI
    • B65G51/22
    • PURPOSE:To locate a moving body to the specified position from the outside of a tube in a highly accurate manner, by constituting a device so as to give or receive a sound wave between the tube outside and an inner tube moving body in making a tube wall a transmitting medium and to measure and display sonic propagating time between two points of the tube wall. CONSTITUTION:A sound generator 10 is attached to the outside of a tube of the stop desired position shown by an arrow, while a sound detector 20 is installed in a moving body 200. And, a sound generating signal is transmitted to the sound generator 10 from a signal processor 300, and from that time, a time differential till the sound to be generated out of the sound generator 10 is detected by a detector 20 is measured, whereby a distance of the moving body 200 up to the stop position is judged. When this time differential comes to minimum, the moving body 200 is stopped. With this constitution, positioning accuracy is improvable.