A method and a set of devices for remote location of buried persons.

摘要

The subject of the invention is a method and a set of devices for remote location of buried persons, consisting of a transmitter being a source of a field and a location device. The method according to the invention consists in determining in a near-by zone an approximate distance of a transmitter with a magnetic antenna of arbitrary and unknown orientation by a measurement of an amplitude of a field from at least two measuring points and then determining from the dependence of the mean value of an actual amplitude of a resultant vector of a magnetic component of a field induced by an elementary dipole in a form of a magnetic antenna on the distance of the said dipole, increase by 2 dB or decreased by 2 dB, depending on that if the receiving antenna is directed approximately compatibly with the direction of the source of the field or perpendicularly. A transmitter according to the invention having a transistor generator, a magnetic antenna, a secondery battery, is characterized by that between the supply-and the stationary contacts of a jack - switch an in-series circuit of a rectifying diode, a charging-current limiting resistor, a secondary battery and a sparking-protection resistor is connected. Parallely to the secondary battery and the protection resistor an in-series circuit of a Zener diode and a light-emitting diode signalling the state of charging the secondary battery is connected. The moving contact of the jack - switch is connected with the generator through a supply voltage regulator. The location device according to the invention is characterized by that it has in the signal channel a connected in-series periodic magnetic antenna distance-connected by a multicore cable through an induction coil with an input resonant circuit at the input of a mixer which is connected with output signalling-indicating circuit, through two low frequency amplifiers, the first amplifier and the mixer being provided with circuits of voltage regulation of the gain, which are connected parellely with the supply voltage regulator through a precision potentiometer coupled with the distance scale and a scaling voltage regulator.