FIELD: radio engineering; rescue operations.
SUBSTANCE: novel in iterative method of increasing accuracy of searching affected under rubble is provision of whole mine personnel with beacons, and establishing of search group, which is equipped with radio beacons activation devices and search devices in amount of three pieces. At that, calculation of coordinates of search object is performed by iterative methods. Activation device drives variable-frequency magnetic field with one frequency and set power. This variable magnetic field is caught by mine personnel radio beacon and if radio beacon exceeds certain threshold level of this field, heart rate microwave sensor is actuated and low-frequency magnetic field is excited with another frequency. By movable coils with ferromagnetic cores of search devices that variable-frequency magnetic field is catched, amplified electrical signal obtained at output of coils and measuring its level. By rotating moving coils with electromagnetic cores maximum readings of level meter are produced, wherein position of coil is stored. Distance from each of search devices to radio beacon, which correspond to coaxial arrangement of coils search devices is determined by measured signal levels with help of previously captured nomogramm. By dependence of normalization coefficient and deviation angle relative to coaxial arrangement of coils measurement of range is corrected, producing successively several iterations. At known distances between search devices and known azimuths of search devices themselves relative to each other, azimuths of beacon or search object from each of search devices are determined. Selecting these azimuth and distance to search object from that of search devices, from which rescue operations are carried out most efficiently.
EFFECT: iterative method of searching for injured people under rubble can be used to locate personnel under rubble in mines as a result of an emergency situation.
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