Optoelectronic system to control spatial position of railway track

FIELD: transport.

SUBSTANCE: invention relates to control instruments. Proposed system comprises radiation source 2 and signal processor 3 and photo receiver 1 made up of level transducer 21 and receiving analyser system 11 including lens 13 and position-sensitive optical radiation receiver 15, arranged on control truck 9 arranged on track 10. Output of photo receiver 1 is connected to input of signal processor 3. Radiation source is arranged on at least one contact-wire line support 4 or other structure, and is made up of reference mark containing at least two modulated light diodes 5 and photo receiver (b) and radiation source control circuit connected to independent power supply input 7. Photo receiver unit comprises extra receive-and-analyse system 12, control module 17 including at least one light diode radiator 18, photo receiver 18 and data signal processing circuit 20 with its output connected with input of second processing unit 3 with third input connected to level transducer 21 rigidly coupled with photo receiver 1.

EFFECT: higher accuracy of measurement.

2 dwg

 

Opto-electronic system (IPS) to control the spatial position of the railway track refers to measuring technique and allows to determine the deviation of the current position of the train tracks from the design position in the longitudinal profile, in plan and level.

From patent US 5613442 from 25.03.1997, a device for monitoring the spatial position of the railway track. The device includes a radiation source located on the measuring cart, photodetection unit and a level sensor located on a track car, and a processing unit.

The measurement is performed as follows. Optical readout beam is placed between the radiation source is placed on the measuring carriage, and a photodetector unit on a track car, divided by the measured section of the route. As the movement track machine towards measuring the trolley there is a continuous reading of the point of incidence of the beam on the photosensitive area of the position-sensitive receiver. The sum of the data from the position-sensitive receiver and a level sensor, the processing unit calculates the current position of the railroad tracks required for alignment path.

The disadvantage of this device is the presence of low accuracy, which ensures the accuracy of the mouth of the unit emitter of the measuring cart, the impossibility of binding instrument coordinate system to the absolute geodetic coordinate system, in which you set the design position of the railway track, carried out with continuous motion machine.

From the patent RU 2256575, IPC B61K 9/08 from 04.11.2003, known ECO to control the spatial position of the railroad tracks, selected as a prototype consisting of two measuring trolley mounted on the track and connected both kinematically and optical measuring channel. At first in the direction of movement of the measuring carriage has a radiation source that represents the led. In the second movement of the measuring carriage has photodetection unit. It consists of an optical receiving and analyzing system comprising a lens and a position-sensitive receiver of optical radiation, mounted in the plane of the image analysis of the led, and electronic devices determine the coordinates of the energy center of the optical image. The latter is connected to a position-sensitive receiver of optical radiation. The sighting axis of the photodetector unit is nominally parallel to the base rail. For measuring angles of inclination of the trucks they are equipped with level sensors. For bindings measurement results to of completed nomu path, to ensure comparability of measurement results to the stationing on the second cart is an incremental sensor distance traveled (odometer). The displacement of the radiation source with the sighting axis of the photodetector unit, as well as data about the past trolleys distance process in the processing unit, performing algorithmic information processing.

The disadvantages of the known devices is the presence of several measuring trucks, as well as the accumulation of measurement errors due to the use of relative measurement method, which is based on the formation of the measuring base relatively moving the measuring trucks, which eliminates binding measurements to an absolute timestamp.

The technical result of the invention is to improve the accuracy of measurement of the actual position of the track in the profile, and in terms relative to its design position.

This technical result is achieved by creating an optical-electronic system to control the spatial position of the railway track containing the radiation source and located on the measuring carriage, mounted on a railway track, the signal processing unit and the photodetector unit comprising a level sensor and receiving and analyzing system, enabling the second lens and the position-sensitive receiver of optical radiation, mounted in the plane of the image analysis of the radiation source, the radiation source optically coupled to photodetector unit, the output of which is connected to the input of the signal processing unit, characterized in that the radiation source has at least one support contact network or other construction, installed along the railway line in the direction of travel of the machine in accordance with geodetic marks the design position of the path and made in the form of fiducial marks containing at least two modulated light-emitting diodes and is connected to the input of a standalone power source, the photodetector and the control circuit of the radiation source, the photodetector unit contains additional receiving and analyzing system including the lens and the position-sensitive receiver of optical radiation, mounted in the plane of the image analysis of the radiation source, and a control module including at least one led emitter, a photodetector and the electronic processing circuit informative signals, the output of which is connected with the second input of the processing unit, a third input connected to the output of the level sensor is rigidly connected with the photodetector unit, the radiation source optically coupled to a photodetector control module and the receiving-analysis is youdemi systems and the led emitter - photodetector fiducial marks.

The imposition of a radiation source outside the railway makes it possible to measure the absolute method, which allows to accumulate the measurement error as the movement of the measuring trolley along the blade, in addition, this method provides a measurement of the actual position of the track in absolute geodetic measuring coordinate system that allows you to "bind" the measurement data to the project marks.

The implementation of the radiation source in the form of fiducial marks determines the ability to control the radiation source, allowing you to turn on the LEDs for a short measurement time, thereby improving energy efficiency and increasing the service life of the radiation source, in addition, the control circuit of the light source allows the modulation of the radiation flux LEDs, which can be passed to the photodetector unit additional information, such as ID tags, data about the project the position of the railway track and other additional data. Perform a radiation source mnogodetnym can increase the probability of correct detection of fiducial marks, i.e. to increase the noise immunity.

In addition, due to the absence of bulky E. which of the elements in the schema reference labels the radiation source can be made very compact.

The introduction of additional receiving and analyzing systems in photoreception unit allows on the obtained two-dimensional image of the radiation source (stereo) to calculate both the distance to the measurement object, and its offset in the vertical plane relative to the zero of the instrument coordinate system (position measurement path in the plan and profile), in addition, by adjusting the distance between receiving and analyzing systems, you can change the limit for the accuracy of the measurement.

The control module may contain one or more emitters with a large enough angular divergence of radiation arranged in a row vertically, to cover the whole range of measured deviations.

The essence of the invention is illustrated by drawings, where figure 1 presents the layout of the device, figure 2 - structural diagram of the device.

Opto-electronic system to control the spatial position of the railroad tracks (figure 1) consists of three functional blocks: a photodetecting unit 1, the radiation source 2, made in the form of fiducial marks, and processing unit 3. The radiation source 2 is fixed on the supports contact the network 4 or other structures along the railway line in the direction of travel of the machine in accordance with geodetic marks design position p is t. Components of the radiation source 2 are two or more LEDs 5-modulated radiation, a photodetector 6, a standalone power source 7 and the control circuit of the radiation source 8. Reference mark 2 is optically connected with the photodetector unit 1, located together with the processing unit 3 on the measuring carriage 9, which is mounted on the track 10. Photodetecting unit 1 consists of two optical receiving and analyzing systems 11 and 12 serving to receive optical images of the LEDs 5 and convert them into digital electrical signals. Receiving and analyzing systems 11, 12 spaced by the value of base, and the optical axis of these systems intersect in the point corresponding to the distance measurement. Each optical receiving and analyzing the system consists of spaced along the beam lens 13 (14) and a position-sensitive receiver of optical radiation 15 (16), the outputs of which are connected to the first input of the processing unit 3. Photodetecting unit also includes a control module 17, represented by one or more emitter 18, optically connected to a photodetector 6, optically connected with the LEDs 5 a photodetector 19, the output of which is input electronic circuit for processing informational signal 20, the first output of which is connected to the emitters 18 and the second output with the second input of the processing unit 3. In addition, the photodetector unit 1 contains a level sensor 21, rigidly connected therewith. The output of the level sensor 21 is connected to the third input of the processing unit 3.

Structural diagram presented in figure 2, explains existing in the communication system. The system consists of three blocks: a photodetecting unit 1, the radiation source 2, made in the form of fiducial marks, and processing unit 3. Input LEDs 5 serves the control signals from the output control circuit of the radiation source 8, the first input of which is connected to the output of the photodetector 6. The first input of the photodetector 6 is optically connected to the photodetecting unit 1 and to the second input of the photodetector 6 and the second input of the control circuit of the radiation source 8, the electrical signal from a standalone power source 7. The radiation source 2 communicates with the photodetecting unit 1 via several optical channels. Some channels connecting the emitters 18 with the photodetector 6 and serve to signal about finding this reference mark in the field of view of the photodetector unit 1. Other channels connect the LEDs 5 with a photodetector 19 and serve to activate the process of "capture" of frames. The third channel connecting the led 5 with the optical receiving and analyzing systems 11 and 12 are required for the formation of images of the LEDs 5. Module pack is Alenia 17 serves for the activation of the LEDs 5, as well as produce at the time of passing through the measuring carriage 9 of the radiation source 2 control signal, whereby the optical receiving and analyzing systems 11 and 12 capture images of the LEDs 5 and convert it into digital electrical signals. The control signal from the first output of the electronic circuit processing an informative signal 20 is input to one or more emitters 18. To the input of the electronic circuit processing of informative signals 20 receives the electric signal from the photodetecting device 19. Photodetecting unit 1 communicates control and measurement information processing unit 3 through the following electronic channels. The first channel is required to transfer converted into electric image signals from the optical receiving and analyzing systems 11 and 12 in the processing unit 3 to calculate the required values of distance and displacement. The second channel processing unit 3 is connected with the control module 17, which transmits to the processing unit 3 information about the passage of the photodetecting unit 1 radiation source 2. Through the third channel processing unit 3 is connected with the output of the level sensor 21, which transmits the information about the inclination of the photodetecting unit 1. Mounted on the measuring trolley photodetecting unit 1 is fixed on the base, which is fixed and the sensor is level 21. Information from the output of the processing unit 3 are supplied to the Central processing unit track machine.

Opto-electronic system to control the spatial position of the railway track works as follows.

When the movement of the measuring trolley from one contact network to another, each of which has a radiation source 2, there is a continuous survey of the surrounding space optical receiving and analyzing systems 11 and 12, but the resulting footage will not be stored or processed. In addition, the photodetector unit 1 also produces continuous lighting lying before him space using one or more emitters 18. At the time of passing through the measuring trolley support with a radiation source 2, the photodetector 6 registers of incident optical radiation from one or more emitters 18 and converts it into an electrical signal. The output signal of the photodetector 6 is fed to the input circuits of control of the radiation source 8, which produces the activation of the LEDs 5. The optical signal from the LEDs 5 falls on the photosensitive area photodetecting device 19, which converts incident radiation into an electrical signal. Output from the photodetecting device 19, the signal is fed to the input of the electronic circuit processing information which provide signals 20, which controls the operation of the radiator 18. In addition, the electronic processing circuit informative signals 20 generates a signal on one of the inputs of the processing unit 3. On this signal in the memory of each of the measuring channel are stored frames received by the optical receiving and analyzing systems 11 and 12 and containing images of the LEDs 5. Next, in the processing unit 3 receives the processed image and calculates the required values of the distance and displacement of the railroad tracks relative to the design position.

To reduce bias operation of the system when there is a deviation of the position of the path from zero of the measured coordinates of the distance L and Y offset are translated at the end the following formulas:

L'=L1 cos φ,

Y'=Y1-L1 tg φ,

where φ is the angle of inclination of the road (coming from the level sensor 21).

An example of a specific implementation.

Each receiving and analyzing the system contains a lens with a filter bandwidth which is consistent with the spectral characteristics of the LEDs fiducial marks. The position-sensitive receiver of optical radiation implemented as a CMOS sensor.

The control module contains the emitter, made in the form of led spotlight, photodetector consisting of a photodiode is with the lens, and the electronic processing circuit informative signals on the basis of the microcontroller. The device operates in accordance with software of a microcontroller.

The level sensor is an inclinometer.

Reference tag contains two LEDs with the modulated radiation, a photodetector, a control circuit, the radiation source is made on the basis of the microcontroller, and an Autonomous power supply, which represents the battery type "AA".

The processing unit is executed on the basis of the industrial computer.

Thus, the claimed ECO to control the spatial position of the railway track provides high-precision control of the current position of the train paths relative to project simultaneously in two mutually perpendicular directions (longitudinal profile and plan), and also provides high energy efficiency.

Opto-electronic system to control the spatial position of the railway track containing the radiation source and located on the measuring carriage, mounted on a railway track, the signal processing unit and the photodetector unit comprising a level sensor and receiving and analyzing system comprising a lens and a position-sensitive receiver of optical radiation, mounted in the plane of anal is for the image of the radiation source, moreover, the radiation source optically coupled to photodetector unit, the output of which is connected to the input of the signal processing unit, characterized in that the radiation source has at least one support contact network or other construction, installed along the railway line in the direction of travel of the machine in accordance with geodetic marks the design position of the path, and made in the form of fiducial marks containing at least two modulated light-emitting diodes, and connected to the input of a standalone power source, the photodetector and the control circuit of the radiation source, the photodetector unit contains additional receiving and analyzing system comprising a lens and a position-sensitive receiver optical radiation mounted in the plane of the image analysis of the radiation source, and a control module including at least one led emitter, a photodetector and the electronic processing circuit informative signals, the output of which is connected with the second input of the processing unit, a third input connected to the output of the level sensor is firmly attached to the photodetector unit, and the radiation source optically coupled to a photodetector control module and receiving and analyzing systems, and led emitter - photodetector R the Pern label.



 

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