SU1448036A1 - Apparatus for measuring displacement of traveling line - Google Patents

Abstract

The invention relates to a drilling technique, in particular, to devices used to tie in depth measurements during a drilling process. The purpose of the invention is to improve the measurement accuracy. The device contains a transformer converter for moving a traveling rope 10, comprising a magnetic core 1 with tips 2, an excitation winding 3, a measuring winding 4 and 5, a generator 6, a detector 7, a comparator 8, a pulse former 9. The tips 2 of the magnetic circuit 1 are spaced apart from each other at a distance that is a multiple of the half-step of the winding of the traveling cable 10. The measuring windings 4 and 5 are connected according to and in series. The signal from winding 4 depends on the speed of the cable and the cable 10 strands. The total signal taken from winding 5 does not depend on the speed of movement of the cable 10 and reflects the magnetic properties of the rope and the nature of the radial beating of the rope. The trigger threshold of the comparator 8 is set by a signal from the winding 5 through the detector 7. The output signal of the comparator 8 is fed to the driver of 9 pulses, the number of which reflects the movement of the pulley rope 10. 1 sl. (O 4 4 00 O 00 Od

Description

The invention relates to a drilling technique, in particular, to devices used to tie in depth measurements during a drilling process.

The purpose of the invention is to improve the measurement accuracy.

The drawing shows a structural diagram of the proposed device.

The device contains a transformer converter comprising a magnetic core 1 with tips 2, an excitation winding 3, a first measuring winding 4, a second measuring winding 5, a generator 6 connected to the excitation winding 3, a detector 7, a comparator 8, which is connected to the driver 9 pulses. The first measuring winding 4 is connected to the input of the comparator 8, the second measuring winding 5 is connected in series and in accordance with the first measuring winding 4 and connected to the input of the detector 7, the output of which is connected to the control input of the comparator 8. The transformer converter interacts with a cable 10, Measuring windings 4 and 5 are located on opposite tips 2 of magnetic conductor 1, made possible to be separated from each other at a distance equal to a multiple of an odd number of half steps Islands wireline.

The device works as follows.

During the movements of the pulley rope 10, the magnetic flux created by the excitation winding 3 is redistributed, as a result of which the flux through the tip 2 of the magnetic circuit 1 increases, under which the protrusion of the cable MOT passes, and

5 0 5 0

five

0

windings 4 and 5, depends on the magnitude of the radial beats and the magnetic properties of the rope; therefore, the total signal from the measuring windings 4 and 5 characterizes the magnetic properties of the rope and the radial beating. In the proposed device, the sum signal is obtained by sequentially and consistently turning on the measuring windings 4 and 5. This signal is rectified by the detector 7 and fed to the input of the comparator operation threshold 8, if the signal increases or decreases as a result of a beat or change in the magnetic properties of the cable 10 measuring winding 4, the output signal of the detector 7 accordingly increases or decreases, and the correct operation of the device is not disturbed, since the threshold of the comparator 8 triggers .

The use of the proposed device eliminates the inaccuracy caused by radial runout, the effect of dynamic loads and the variation of the magnetic parameters of the rope, while eliminating the need for adjustments and adjustments when changing the rope.

Formula of invention

A device for measuring the movement of a pulley rope containing a transformer displacement transducer, including a magnetic core with lugs, an excitation winding, and two measuring windings, a comparator, the output of which is connected to a pulse shaper,. a generator connected to the field winding, the tips of the magnetic circuit being made with the possible

the flow through tip 2 is reduced;

under which lies the root of the dey of the cable 10. At the outputs of the measuring windings 4 and 5, signals appear, the amplitude of which is modulated by the size of the gap under the tips 2. The flow created by the excitation winding 3 remains unchanged, since the total magnetic resistance for the total flux remains almost constant. The total magnetic flux coupled by the measuring

 VNIIPI Order 6820/37

Pro.v.-polygram. g

0

a distance equal to a multiple of an odd number of half-steps of wireline rope winding, characterized in that, in order to improve accuracy, it is equipped with a detector, the first measuring winding is connected to the comparator input, the second is connected in series and according to the first and connected to the detector input which output is connected with a comparator control input.

Circulation 532 Subscription Uzhgorod, st. Project, 4

Claims (1)

Claim A device for measuring the movement of a tackle rope, comprising a transformer displacement transducer comprising a magnetic circuit with ferrules, an excitation winding. and two measuring windings, a comparator, the output of which is connected to the pulse shaper, a generator connected to the field winding, and the tips of the magnetic circuit are arranged to be spaced from each other at a distance equal to a multiple of an odd number of half-steps of winding the wire rope, characterized in that, for the purpose of to increase accuracy, it is equipped with a detector, the first measuring winding connected to the input of the comparator, the second connected in series and according to the first and connected to the input of the detector, the output which is connected to the control input of the comparator. <532 Subscription Custom polygr. ave, city of Uzhhorod, st. Project, 4