RU2786255C1 - Rail vehicle positioning device - Google Patents

Abstract

FIELD: railway rail transport.

SUBSTANCE: invention relates to means for determining the location of mobile units of railway rail transport. The device contains a computing unit (1) installed on the mobile unit of the railway rail transport, to which a memory module (2) is connected with an electronic route map recorded in it, on the body (3) of the mobile unit of the railway rail transport, series-connected integrators (4) are rigidly fixed, narrow-band filter (5), detector (6) and analog-to-digital converter ADC (7), an inductor (8) is connected to the integrator (4), inductively coupled with the axle (9) of the wheelset (10), ADC (7) is connected to the computing unit (1).

EFFECT: increased accuracy and noise immunity of the positioning of the rolling unit of the railway rail transport throughout the entire section of the railway track.

1 cl, 1 dwg

Description

The invention relates to the field of railway automation and can be used to determine the location of mobile units of railway rail transport.

A device for determining the location of a rail vehicle is known, comprising a time interval measurement unit and an information unit connected to the rails at one end of the rail line, and a calibration shunt is connected to the rails at the other end of the rail line, a section occupancy determination unit connected to the rails at one end of the rail lines, key elements connected by the first inputs to the output of the block for measuring the time interval, a memory block and a block for calculating the coordinates of the vehicle, connected with the output to the information block, one input - with the output of one key element connected by the second input to one output of the section occupancy determination block, the other input of which is connected to the second input of another key element connected by the output to the input of the memory block connected by the output to another input of the vehicle coordinate calculation unit (SU1162653, B61L 25/02, 06/23/1985).

The disadvantages of this device are the need for the formation and transmission of additional signals to the rail line and the direct connection of the equipment to the rail line.

A device for monitoring the location of rolling stock is known, containing a generator installed on a locomotive with a transmitting antenna inductively coupled to a loop located on the way, connected through a resonant amplifier to the inputs of an amplitude discriminator and a coherent signal shaper, the output of which is connected to one input of a phase demodulator, the output of which is connected to indicator, a key element, with one input connected to the output of the amplitude discriminator, the other - to the output of the resonant amplifier, and the output - to another input of the phase demodulator (SU1219441, B61L 25/02, 03/23/1986).

The disadvantages of this device are the need for the formation and transmission of signals to additionally stacked along the path of the loop, as well as determining the location of the rolling stock with an accuracy of the laying area of the loop.

A device for determining the coordinates of a movable object is known, containing a transmitter installed on a movable object with an inductive coupling element, and on the way - a three-wire inductive line interacting with the said inductive coupling element, the two wires of which are laid with a cross and connected to the output of one of the windings of a linear transformer, to the middle output of which is connected to the third wire through one of the windings of the current transformer, the other end of which is connected to the ends of the first and second wires, and the phase receiver, to the inputs of which other windings of the linear and current transformers are connected, the device is additionally equipped with a reversible counter, elements AND, OR, HE and delays, D- and JK-flip-flops and additional current and linear transformers, a phase receiver and a three-wire inductive line, two wires of which are laid with a double crossing pitch with respect to the first one and connected to the outputs of the primary winding of the second linear transformer mator, to the middle output of which, through one of the windings of the second current transformer, the third wire of the second inductive line is connected, the other end of which is connected to the ends of its first and second wires, and the other windings of the second linear and current transformers are connected to the inputs of the second phase receiver, and the output of the first of the phase receiver is connected to the counting inputs of the D- and JK-flip-flops and to the input of the delay element, the output of which is connected to the first inputs of the first and second AND elements, the second inputs of which are connected to the outputs of the JK-trigger, the outputs - respectively, to the inputs of the direct and reverse counting of the reverse counter, and the output of the second phase receiver is connected to the setting input of the D-trigger, to the input of the NOT element and the first input of the third AND element, the second input of which is connected to the first output of the D-trigger, the second output of which is connected to the first input of the fourth AND element, the second input which is connected to the output of the NOT element, and the outputs of the third and fourth elements And connected respectively to the inputs of the OR element, the output of which is connected to the installation inputs of the JK flip-flop (SU 1252223, B61L 3/20, 08/23/1986).

The disadvantages of this device are the need for the formation and transmission of signals to additional laid along the path of the inductive line, as well as determining the location of the rolling stock accurate to the area of laying the inductive line.

As a prototype, a device for positioning a rail transport was adopted, containing a receiver installed on a rolling unit of a railway rail transport, connected to a computing unit, to which a memory module with an electronic route map recorded in it is connected, a contactless contactless a current meter with a transmitter connected to it, which is connected via a radio channel to the input of the receiver, the output of the computing unit is the output of the device (RU2768805, B61L 25/00, 03/24/2022).

The disadvantage of this device is the need to install a non-contact current meter with a transmitter connected to it on the axle of the wheelset of the rolling unit of the railway rail transport, which, when the axle of the wheelset vibrates during movement, leads to measurement errors of the non-contact current meter, up to its failure.

The technical result of the invention is to improve the accuracy and noise immunity of the positioning of the mobile unit of the railway rail transport throughout the entire section of the railway track (gauge).

The technical result is achieved by the fact that in a device for positioning a rail vehicle, containing a computing unit installed on a rolling unit of a railway rail transport, to which a memory module with an electronic route map recorded in it is connected, while the output of the computing unit is the output of the device, according to the invention, and an integrator, a narrow-band filter, a detector and an analog-to-digital converter are rigidly fixed on the body of the rolling unit of a railway rail transport, the outputs of an inductance coil inductively connected to the axis of the wheel pair of a rolling unit of a railway rail transport are connected to the input of the integrator, and the output of the analog-to-digital converter is connected to the input of the computing unit.

The drawing shows a functional diagram of the device for positioning rail transport.

The device for positioning rail transport contains a computing unit 1 installed on a rolling unit of a railway rail transport, to which a memory module 2 is connected with an electronic route map recorded in it, while the output of the computing unit 1 is the output of the device, on the housing 3 of the rolling unit of a railway rail transport rigidly an integrator 4, a narrow-band filter 5, a detector 6 and an analog-to-digital converter (ADC) 7 connected in series are fixed; digital converter 7 is connected to the input of the computing unit 1.

Device for positioning rail transport operates as follows.

A device for positioning rail transport based on the analysis of the measured parameters of the current flowing along the rails and wheelset of the rolling unit of the railway rail transport, allows the calculation of the current coordinate (location) of the rolling unit within the railway section of known length.

As shown in the description of the technical solution chosen as a prototype according to patent RU2768805, the amplitude of the current flowing along the axis of the wheelset is equal to:

or

where U is the known output voltage of the current source;

известные постоянные параметры.

known constant parameters.

где L – известный масштабный коэффициент, определяемый величиной индуктивности цепи протекания тока,

- частота тока рельсовой цепи. Данное магнитное поле наводит в катушке индуктивности 8 э.д.с.

, где k - известный масштабный коэффициент, определяемый параметрами катушки индуктивности 8. Напряжение с выхода катушки индуктивности 8 поступает на вход интегратора 4, на выходе которого формируется напряжение, пропорциональное текущему значению

. С выхода интегратора 4 через узкополосный фильтр 5, обеспечивающий фильтрацию сигнала с частотой

, сигнал поступает на вход детектора 6, с выхода которого снимается сигнал Y _I , пропорциональный величине

:

, где К - известный масштабный коэффициент, определяемый параметрами цепи «катушка индуктивности 8 -...- детектор 6». Данный сигнал Y _I через аналого-цифровой преобразователь 7 поступает на вход вычислительного блока 1, где относительно переменной х решается нелинейное уравнение:An alternating current flowing along the axis 9 of the wheelset 10 creates an alternating magnetic field with induction

where L is a known scaling factor determined by the value of the inductance of the current flow circuit,

- the frequency of the track circuit current. This magnetic field induces 8 emf in the inductor.

, where k is a known scale factor determined by the parameters of the inductor 8. The voltage from the output of the inductor 8 is fed to the input of the integrator 4, at the output of which a voltage is generated proportional to the current value

. From the output of integrator 4 through a narrow-band filter 5, which provides signal filtering with a frequency

, the signal is fed to the input of the detector 6, from the output of which the signal Y _I is taken, proportional to the value

:

, where K is a known scaling factor determined by the parameters of the circuit "inductor 8 - ... - detector 6". This signal Y _I through the analog-to-digital converter 7 is fed to the input of the computing unit 1, where the non-linear equation is solved with respect to the variable x :

(2)

(2)

using well-known iterative methods (for example, after preliminarily multiplying Y _I by the denominator of expression (1) followed by squaring and using the Newton-Raphson method:

(3)

(3)

Since the initial value of x is known exactly - x=l, then this algorithm converges in 2-4 steps, which ensures the determination of the x coordinate in almost real time). Information about the path (the length of the rail line (block section), the coordinates of its end X _K , Y _K and the azimuth angle A of the inclination of the rail track, placed in the form of an electronic map in the memory module 2, is read from the safety devices of the rail transport wirelessly before starting the movement communication channel, or downloaded via removable media.Computing unit 1 refers to the memory module 2 to obtain the necessary data on the azimuthal angle A , the length of the rail line and the coordinates X _K , Y _K of its end.After determining the value of x in the computing unit 1, the current projections are calculated distances of the wheelset from the end of the rail line on the axis of the two-dimensional Cartesian coordinate system:

sin A , y _t = x

cos A , X _t =x

sin A ,y _t = x

cos A ,

and finally - the current coordinates of the wheel pair of the rolling unit of the railway rail transport in a two-dimensional Cartesian coordinate system:

sin A , Y _t = Y _К - x

cos A , X _t = X _To -x

sin A , Y _t = Y _To -x

cos A ,

coming further from the output of the computing unit 1 to the output of the device.

When the wheelset 10 passes the end of the rail line, determined by the measured value of the known amplitude of the current, the current coordinates are assumed to be equal to X _t = X _To , Y _t = Y _To , which nullifies possible errors in determining the current coordinates of the wheelset at the end of each rail line and, along with the above definition of its current coordinates, provides high-precision positioning of the rolling unit of the railway rail transport.

Claims (1)

A device for positioning rail transport, comprising a computing unit installed on a rolling unit of a railway rail transport, to which a memory module is connected with an electronic route map recorded in it, while the output of the computing unit is the output of a device, characterized in that it is introduced and rigidly fixed on integrator, a narrow-band filter, a detector and an analog-to-digital converter are connected in series in the body of the rolling unit of a railway rail transport, the outputs of an inductance coil inductively coupled to the axis of the wheel set of a rolling unit of a railway rail transport are connected to the input of the integrator, and the output of the analog-to-digital converter is connected to the input of a computing block.

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