RU178065U1 - ELECTRODYNAMIC SEISMIC RECEIVER WITH INCREASED MECHANICAL RESISTANCE - Google Patents

Abstract

The invention relates to a vibration measuring technique. Declared electrodynamic geophones with increased mechanical resistance, contains a housing, a cover, a permanent magnet, a coil with a winding, a sensing element, a board with a resistor. The permanent magnet is made in the form of a plate and is located outside the coil parallel to the plane of the winding turns. The seismic receiver further comprises a locking device of the clamping principle of action with the possibility of holding the coil in a stationary position. The technical result is an increase in the mechanical resistance of the electrodynamic geophone. 1 ill.

Description

This utility model relates to vibration measurement technology and can be used in seismic exploration.

The prior art electrodynamic geophones (see patent RU 2082991 C1, priority 12.01.1994), consisting of a housing, a permanent magnet with pole pieces, two covers, coils with identical windings, elastic elements made, for example, on iris springs , and insulating gaskets.

Also known is the seismic receiver SV-20P TU 04.25.1950-80 (Chistova GK, “Models and methods for processing seismic signals in recognition systems”, Moscow: Penza State University, 2003, pp. 18-20), taken as a prototype consisting of a cylindrical body, with a cylindrical permanent magnet fixed inside. The movable coil is mounted on the iris springs in the annular gap between the magnet and the housing.

The technical solutions known to the authors do not ensure the preservation of the product performance after exposure to a single impact with a high value of peak shock acceleration (more than 300 g). Impact leads either to the failure of sensitive elements (iris springs), or a partial loss of their rigidity, which leads to a shift in the natural frequency of the oscillating system and, as a consequence, a change in product parameters, which is unacceptable for sensors of this type.

The objective of this utility model is to create a seismic receiver devoid of the above drawback.

The technical result consists in increasing the mechanical resistance of the electrodynamic geophone.

The problem is solved using an electrodynamic geophones with increased mechanical resistance, comprising a housing, a cover, a permanent magnet, a coil with a winding, a sensing element, a board with a resistor. The permanent magnet is made in the form of a plate, located outside the coil parallel to the plane of the turns of the winding. The seismic receiver also contains a locking device of the clamping principle of action with the possibility of holding the coil in a stationary position.

In FIG. 1. shows a structural diagram of the proposed seismic receiver.

The coil with the winding 1 of the seismic receiver is mounted in the housing 2 on the sensing element 3. The housing is closed by a cover 4, consisting of a dielectric material in which two conductive contacts 5 are located. The permanent magnet 8 is made in the form of a plate and is located outside the coil parallel to the plane of the winding turns. The coil with winding 1 is held on the sensing element 3 by a board 6 fixed to it on which a resistor 7 is located. The beginning and end of the coil winding are soldered to the board 6. The board 6 is connected to the contacts 5 by wires 9.

The coil with the winding 1 of the seismic receiver during operation makes oscillatory movements in the axial direction. The arresting device 10 includes a movable element 11, ending in a specific profile. In the coil frame there is a reciprocal groove of a similar shape. The movable element 11 fixes the coil with the winding 1, pressing it against the housing 2, in a position in which the sensitive elements are undeformed or slightly deformed. In this case, the energy of the impact directed along the axis of the coil with the winding 1 will not be directed to the sensing element 3, but to the movable element 11 of the arresting device 10, which holds the coil in a stationary position. The impact of a shock directed not in the axial direction of the coil with winding 1 is eliminated from the sensing element 3 by small gaps between the coil with winding 1 and the housing 2, thus, the shock will be perceived by the coil with winding 1 having sufficient rigidity to maintain the working capacity of the geophone.

Before you begin, you must unlock the coil by removing the movable element of the locking device. This action can be performed either manually or automatically mechanically (for example, by an electric motor, a solenoid or other device).

Design features of the proposed technical solution can significantly increase the resistance of the geophone to mechanical stress.

Claims (1)

An electrodynamic geophone with increased mechanical resistance, comprising a housing, a cover, a permanent magnet, a coil with a winding, a sensing element, a board with a resistor, characterized in that it additionally contains a locking device of the clamping principle of operation, made with the possibility of holding the coil in a fixed position, while the magnet is made in the form of a plate and is located outside the coil parallel to the plane of the winding turns.

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