RU168277U1 - Device for simulating an alternating magnetic field - Google Patents

Abstract

The utility model relates to the field of railway transport and can be used to quickly measure the parameters of the receiving coils of automatic locomotive signaling. A device for simulating an alternating magnetic field contains a winding consisting of two parts, a frame made of ferromagnetic material, consisting of a U-shaped base, in the lower part of which there are two magnets, two side racks made in the form of trapeziums, and installed between the upper parts of the side racks a tube of diamagnetic or paramagnetic material, inside which the working part of the winding is located, the beginning and end of which are connected to the corresponding sockets for connecting an external connecting cable, lennymi on one of the lateral struts, not working part of the winding is placed and fixed in the bottom of the U-shaped base. The technical result of the utility model is to create a simple and mobile design that allows you to quickly and reliably fix the device in the working position. 2 ill.

Description

The utility model relates to the field of railway transport and can be used to quickly measure the parameters of the receiving coils of automatic locomotive signaling.

A known device for measuring the parameters of the receiving coils of an automatic continuous locomotive signaling system (ALSN) IPK-1, which includes an exemplary test cable. The cable is a cable of a sufficiently large cross-section, laid under the rail heads (http://scbist.com/xx2/9760-pribor-dlya-izmereniya-parametrov-priemnyh-katushek-alsn.html). To simulate rail signals, currents up to units of amperes (10 A) are used, which determines the energy consumption and generator power requirements.

The known device provides the required safety and speed of trains, but does not allow to obtain the maximum throughput of the railway section due to frequent interruptions in the reception of codes of automatic locomotive signaling in places of high levels of interference from external sources (for example, the intersection of railway tracks with power lines) and short rail circuits where incomplete code cycles of ALS signals can be received.

There is also known a loopless check device (UBP) designed to test the receiving devices of ALSN channels, which includes a wire frame, which is two turns of a five-core cable, deployed before measurements in the form of a frame in the form of a square 1.5 × 1.5 m and fixed on rails using clip-clips at four points (Unified Integrated Locomotive Safety Device (CLUB-U): Textbook / V.I. Astrahan, V.I. Zorin, G.K. Kiselgof et al. 2008, p. 126 )

The disadvantages of this device are the complexity of the design and the inconvenience of its installation, associated with the need for descent into the inspection ditch, the lack of structural rigidity, which contributes to sagging cable, the recession from the rail head and, thus, the impossibility of creating identical measurement conditions, as well as the impossibility of creating a field, providing measurements of individual electromotive force (EMF), total and differential EMF indiscriminately on the terminal block.

The technical result of the utility model is to create a simple and mobile design that allows you to quickly and reliably fix the device in the working position.

The technical result is achieved by the fact that the device for simulating an alternating magnetic field contains a winding consisting of two parts, a frame made of ferromagnetic material, consisting of a U-shaped base, in the lower part of which there are two magnets, two side racks made in the form of trapezoid, and a tube made of diamagnetic or paramagnetic material installed between the upper parts of the side racks, inside which the working part of the winding is located, the beginning and end of which are connected to the corresponding sockets for connecting If the external connecting cable is installed on one of the side racks, the non-working part of the winding is placed and fixed in the lower part of the U-shaped base.

The drawing shows a diagram of the proposed device for simulating an alternating magnetic field.

A device for simulating an alternating magnetic field contains a winding 1, consisting of two parts, a frame made of ferromagnetic material, consisting of a U-shaped base 2, in the lower part of which there are two magnets 3, two side racks 4 made in the form of trapezoid, and installed between the upper parts of the side racks a tube 5 of diamagnetic or paramagnetic material, inside which is placed the working part of the winding 1, the beginning and end of which are connected to the corresponding sockets 6 for connecting an external connecting cable, mounted on one of the side posts 4, not the working part of the winding 1 is placed and fixed in the lower part of the U-shaped base 2.

A device for simulating an alternating magnetic field operates as follows.

The mechanical basis of the device for simulating an alternating magnetic field is a frame made of steel with ferromagnetic properties. The frame has two vertical posts 4 on the sides and a U-shaped base 2.

In the upper parts of the uprights there are holes through which a tube 5 of diamagnetic or paramagnetic material passes and is fixed.

On one of the uprights there are two slots 6 for connecting an external connecting cable. Conductors corresponding to the beginning and end of the working winding 1 are connected to the contact terminals of the sockets. The sockets have color differences (red and black). The orientation of the windings for several devices that create an alternating magnetic field should be the same relative to the direction of the head of the train.

Due to the U-shaped base of the frame, the orientation of the device for simulating an alternating magnetic field in the horizontal plane when mounted on rails is ensured, since the internal distance between the walls of the base with a small gap corresponds to the width of the rail head. The non-working (lower) part of the winding is placed under the base, which provides magnetic shielding of the oncoming magnetic field created by the turns of this part of the winding.

For rigid fixation of a device for simulating an alternating magnetic field on the rail head, two heavy-duty magnets based on a neodymium-iron-boron alloy are installed on the rail head.

When receiving rail signals during the movement of a high-speed electric train, the signal propagation medium (rail) can be considered as an infinite rectilinear conductor. Then, according to the Bio-Savard-Laplace law, magnetic induction is created at a point corresponding to the center of the gearbox and located at a distance R from the surface of the rail head

,

,

Where

μ is the relative magnetic permeability;

μ ₀ - magnetic constant.

A device for simulating an alternating magnetic field is mounted on the rail head so that the center of the working part of the winding 1 (center of the tube 5) is located under the center of the receiving coil of the high-speed electric train.

A device for simulating an alternating magnetic field using a connecting two-wire cable is connected to a generator that provides an alternating current of a given frequency and current strength to the working winding, which allows you to completely simulate the creation of a magnetic field by real rail currents ALS, ALS-EN.

A device for simulating an alternating magnetic field is compact and easily portable. Installing it in the working position takes a few minutes and is reduced to placing the device under the receiving coil, connecting it through a connecting cable to the generator. For installation, it is not necessary to descend into the inspection ditch, installation is carried out by one person.

The device for simulating an alternating magnetic field has a rigid structure and a rigid mount on the rail head, which allows to ensure identical conditions for measuring the parameters of the same receiving coil of the same train, taking into account the frequency of the work.

The individual placement of two devices for simulating an alternating magnetic field under two receiving coils, their individual connection to the generator, the possibility of reconnecting the connection allow you to measure the electromotive force induced individually, the total and difference electromotive force without dismantling the terminal block. It also allows for the implementation of new, more sophisticated measurement information processing algorithms.

Claims (1)

A device for simulating an alternating magnetic field, containing a winding consisting of two parts, a frame made of ferromagnetic material, consisting of a U-shaped base, in the lower part of which are two magnets, two side racks made in the form of trapezoid, and installed between the upper parts of the side the tube is made of diamagnetic or paramagnetic material, inside of which the working part of the winding is placed, the beginning and end of which are connected to the corresponding sockets for connecting an external connecting cable, novlennymi on one of the side racks, not the working part of the winding is placed and fixed in the lower part of the U-shaped base.

Images