SU700644A1 - Orientation sensor - Google Patents

Description

I

The invention relates to magnetic compasses and can be used in instrument-making areas where orientation of an object relative to a magnetic meridian is required, for example, field geophysics, as well as in a device by which the borehole acoustic acoustic logging device is orienting.

Orientation sensors with a magnetically sensitive element are known, in which to keep the magnetic system in a horizontal plane, the sensor card is suspended using a cardan suspension ij.

A known sensor comprising a magnetic system, a float for weighing the movable system for the purpose of unloading the support, and a reading system. The body of the sensor is filled with liquid and suspended on a gimbal. A spring suspension is applied to the entire liquid-filled system 2 to dampen the sensor.

A disadvantage of the known sensors is that the various shocks and vibrations that the device experiences during measurements during the HijS process, are transmitted through the supports to the magnetic system, out-of-balance, create additional errors, and sometimes lead to its breakage.

The aim of the invention is to increase the vibration strength and impact strength of the orientation sensor operating when the instrument is moving.

For this, the cavity is filled with two immiscible liquids, with a ring at the interface level of liquids connected to the float by means of membranes.

The drawing shows the sensor being viewed, the general view.

Claims (2)

Mobile systems, sensor - a card consists of one or several pairs of permanent magnets 1, a reflector 2 n float 3, mounted on a disk 4, the Card is supported by a boom 5 on a core 6, fixed in column 7. Column 7 is fixed on the float 8 of the membrane. The internal cavity of the sensor is filled with two immiscible liquids with different specific gravities, for example glycerin and transformer oil. The float 8 floats at the level of 1-1 section of liquids and is centered on the sensor axis using a rubber membrane with a corrugation 9. The outer edges of the membrane are attached to the ring 10, floating at the level of the section of liquids inside the spherical plane in the liner 11, which also floats at level 1-1, the position of the magnetic system fi: c is using a contactless reading system 12, for example With the transducer 13, the cavity where the reading system rotates, is separated from the cavity of the magnetically sensitive system by a sound-conducting diaphragm. The compensator 15 is designed to compensate for changes in the fluid volume when the device is exposed to temperature and pressure. The weight and volume of the float 8 together with the magnet system, as well as the ring 10, are calculated in such a way that they sink into liquids with a lower specific weight and float up. liquids with a high specific gravity; in this case, the float 8 and the ring 10 float at the level of 1-1.ra8dela liquids. The buoyancy of the liner 11 is calculated in such a way that the equatorial plane of the sphere coincides with the separation plane of the fluids. The fluid with a lower specific gravity is intended for weighing the moving sensor system with the help of the float 3 in order to unload the core 6. The fluid with a larger specific gravity is intended to fix it in the vertical with a damping plane for various impacts of vibrations. At the vertical position of the D1Tchik axis, the level of section 1-1 of liquids is horizontal and the float 8 with a magnet-sensitive system floats on its surface, the ring 10 and the liner 11, the rubber membrane center the float 8. The magneto-sensitive system is installed in the plane of the magnetic meridian, and Its trooping is focused using the swivel system 1 with the transducer 13, the readout is an echo method: the transducer 13 emits the U.C. beam and impulses the elastic oscillations that schenii readout system 12 run around the upper surface of magnetosensitive system circumference. This surface is covered with an absorbing material, for example rubber, therefore the reflection occurs only from the reflector 2, whose position is determined by the magnetic meridian. The vibrations and impacts that the sensor body experiences when the device is moving will be transmitted to the magnetic system through a thick layer of liquids that fill the internal cavity of the device — glycerin and transformer oil — and is quenched by their internal viscosity. In order for the shocks and vibrations that can be transmitted to ring 10 when it is directly touched by B1-shader 11 and the sensor body, cannot spread across the membrane to reach the magnetically sensitive system, the membrane is provided with a corrugation that damps these vibrations. The buoyancy of the liner 11 ensures a constant coincidence of the equatorial plane of the sphere and the plane of separation of liquids with oscillations of the latter, which will occur when the temperature and pressure of the environment change. a housing with an internal cavity filled with liquid, inside of which a card reader is placed on a support, is fixed on the float, and a reading system that differs in 4Ts in order to increase vibration strength and impact resistance, the cavity is filled with two immiscible liquids, and at the section level of liquids a spear is fixed, associated with the float through membranes, sources of information taken into account; during examination 1, Gorenstein I.A., Shulman I.A., Safaren A.S., Inerzig; navigation; , M., Soviet Radio, 1962, p. 155. 2. Braslavsky D "A, Devices and sensors of aircraft M., Mashinostroenie, 1970, p. 269. Trans (rormol7o /} noe us / 70