Opto-electronic system for monitoring spatial position of railway track

FIELD: physics.

SUBSTANCE: opto-electronic system for monitoring spatial position of a railway track includes at least one radiation source, a measuring bogie mounted on the rail track on which there is a processing unit and a photodetector unit, optically connected to the radiation source. The radiation source can be installed on structures moved out of the boundaries of the rail track and lying on the path of the measuring bogie. The photodetector unit has two reception and analysis systems, a tilt sensor of the photodetector unit, a control module whose output is connected to the input of the processing unit, and other input to the output of the tilt sensor of the photodetector unit, and an indicator for movement of the measuring bogie past the radiation source, whose output is connected to the input of the control module.

EFFECT: increased accuracy of measuring spatial position of a railway track and possibility of monitoring the design position of the rail track simultaneously in two mutually perpendicular directions.

6 cl, 2 dwg

 

The invention relates to measuring technique and can be used to control the railroad tracks, in particular for determining the deviation of the railway track from the design position.

A device for monitoring the spatial position of the railroad tracks (US 5613442 A, publ. 25.03.1997, E01B 33/00). The device includes a radiation source located on the measuring cart, photodetection unit and the tilt sensor located on a track car, and a processing unit. The measurement is performed as follows. First set of the optical reference beam between the radiation source on the measuring trolley, 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 tilt sensor, the processing unit calculates the current position of the railroad tracks required for alignment path.

The disadvantage of this device is the low accuracy of the measurements because of the need to ensure accuracy of billing emitter on the measuring carriage and the impossibility of binding systems asked the coordinates to geodetic reference design provisions of the railway track with continuous movement of the machine.

Also known opto-electronic system to control the spatial position of the railway track (EN 2256575, publ. 04.11.2003, B61K 9/08) - prototype, including a radiation source, the measuring trolley mounted on the track, where the processing unit and the photodetector unit, optically associated with the radiation source. The source of radiation, representing the led installed on the first movement of the measuring cart associated with the second measuring truck as kinematically and optical measuring channel. Photodetecting unit mounted on the second course of movement of the measuring carriage 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 last device 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 "binding" of the measurement results to the traveled way, that is, to ensure comparability of the cut is lettow dimensions, stationing, on the second trolley is also incremental sensor distance traveled (odometer). The displacement of the radiation source with respect to 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 and low measurement accuracy due to the inability of the measurement provisions of the path relative to its design position, because you are using relative method of measuring the coordinate position of the railway track, which is based on the formation of the measuring base relatively moving the measuring trolley.

The technical result of the claimed invention is to improve the accuracy of measurement of the spatial position of the railroad tracks and features control design position the track simultaneously in two mutually perpendicular directions in the longitudinal profile and plan.

This technical result is achieved in that in the optical-electronic system (IPS) to control the spatial position of the railway track, comprising at least one radiation source, the measuring trolley mounted on the track, n is where the processing unit and the photodetector unit, optically associated with the radiation source, the radiation source is made with the possibility of installation on structures outside the track and located in the direction of movement of the measuring bogie, while the photodetector unit includes two receiving and analyzing systems, sensor angle photodetection unit, a control module, the output of which is connected to the input of the processing unit, another input connected to the output of the sensor angle photodetection unit, and light passing through the measuring trolley radiation source, the output of which is connected to the input of the control module.

The source of radiation may be in the form of fiducial marks containing the led, reflector and power source.

As the structures for mounting the radiation source can be used contact network.

Each receiving and analyzing the system may include a lens and a position-sensitive receiver of optical radiation, mounted in the plane of the image analysis of the radiation source and the output of which is connected to the input of the processing unit.

The indicator may be in the form of laser position sensor photodetector unit.

As a sensor of the angle of the photodetector unit can be used inclinometer.

Opto-electronic systems which may include more than one radiation source.

The imposition of a radiation source outside the railway and snapping his position to the design position of the path defined in absolute geodetic measuring network (i.e. not depending on the situation the way), and performing photodetection unit comprising two receiving and analyzing systems, sensor angle photodetection unit, a control module, the light passing through the measuring trolley radiation source and the connection of structural elements of the photodetector unit and the processing unit to fix the error in determining the spatial position of the path during movement of the photodetector unit on the trolley along the blade, which consequently increases the accuracy of the measurement.

The essence of the claimed invention is illustrated by drawings, where figure 1 shows the General layout of the device, figure 2 - schematic diagram of the measurements.

Opto-electronic system to control the spatial position of the railroad tracks (figure 1) includes three functional blocks: photodetecting unit 1, the radiation source is performed, for example, reference mark 2 and the processing unit 3. Reference mark 2 is fixed on the structures, outside the track, for example in support of a contact network 4 or other structures along the railway is Oronogo path in the direction of travel of the machine and the geodetic coordinates of which are defined. Reference mark 2 can contain the reflector 5, the emitter, for example, the led 6 galvanic type, located in the plane of the reflector 5, and the power source 7 of the radiator. Reference mark 2 is connected with optical photodetecting unit 1, located together with the processing unit 3 on the measuring carriage 8 that is installed on the track 9. Photodetecting unit 1 (stereo type) consists of two optical receiving and analyzing systems 10 and 11 serving for receiving optical images from the led 6 and further converting it into digital electrical signals; indicator 12, which is used to determine when passing through the measuring carriage 8 benchmark grade 2, the control module 13, which generates at the time of passing through the measuring carriage 8 fiducial marks 2 control signal, whereby the optical receiving and analyzing systems 10 and 11 capture led 6 reference marks 2 and convert it into a digital electrical signals; and a sensor 14 angle photodetection unit 1. Each of the optical receiving and analyzing systems 10 and 11 includes a lens 15 and 16 (for the upper and lower chambers, respectively) and the position-sensitive receiver of optical radiation 17 and 18, mounted in the plane of the image analysis led 6 reference mark 2. Moreover, the optical axis of these is item intersect at the point of maximum distance measurement. The output of the control module 13 is connected to one of inputs of the processing unit 3, the other input connected to the output of the sensor 14 of the angle of the photodetector unit. Output indicator 12 passing through the measuring trolley radiation source connected to the input of the control module 13.

The indicator 12 may be performed, for example, in the form of a laser sensor and optically connected with the reflector 5 reference marks 2 and electrically to the input of the control module 13. The angle of the photodetector unit 1 is controlled by the sensor 14 of the tilt angle, for example using an inclinometer.

Aggregate data from the optical receiving and analyzing systems 10 and 11 from the control module 13 and the sensor 14 of the tilt angle arrives at the processing unit 3, where the processing is the calculation of the values of distance to reference mark 2 and offset with respect to it, which determines the spatial location of the railroad tracks.

Figure 2 presents a schematic diagram of the measurement implemented by the opto-electronic system to control the spatial position of the railway track. In the optical device receiving and analyzing systems 10 and 11 spaced by a distance equal to the base value B=B1+B2, and their optical axes intersect the axis Oz of the instrument coordinate system at the point of maximum distance measurement line is n L 01and L02while forming angles α1and α2with the Oz axis. The optical axis of the lenses 15 and 16 of the optical receiving and analyzing systems 10 and 11 pass through the point y'001and y'002on the surfaces of position-sensitive detectors of optical radiation 17 and 18, respectively. Position-sensitive detectors of optical radiation 17 and 18 are located at distances a'1and'2from the rear nodal points of the lenses 15 and 16. After the capture and analysis of images of the source are given the coordinates y'1and y'2images in the coordinate system of the position-sensitive detectors of optical radiation. These coordinates are computed value of the distance L1 and the displacement Y1, determining the spatial position of the railway track.

Device for controlling the spatial position of the railway track works as follows.

At the time of passing through the measuring carriage 8 reference mark 2, which is determined by the indicator 12 on the returned signal from the reflector 5, the indicator 12 produces a signal frame capture optical receiving and analyzing systems 10 and 11. This signal is supplied to the processing unit 3, and then in the memory of each of the measuring channel are stored frames received by the optical receiving and analyzing with the systems 10 and 11 and contains the image of the radiation source (reference mark 2). The determination of the displacement of the radiation source relative to the base point of the instrument coordinate system in the vertical and longitudinal directions is performed in two stages. First, in the processing unit 3 calculates the vertical coordinates "energy centers of gravity of the images of y'1y'2in pixels (figure 2). The algorithm for determining the energy of the center of gravity is the most simple and ensures accuracy of 0.1...0.01 element size of the position-sensitive receiver of optical radiation. Then, on the basis of the mathematical model are calculated offset L1, Y1 relative to the base point, determining the spatial location of the railroad tracks by the following formulas:

,

.

where1In2base of the upper and lower channels, respectively;

L01, L02- the point of maximum distance measurement for the upper and lower channels, respectively;

and'1and'2back stretches for upper and lower channels, respectively;

y'1, y'2- vertical coordinates "energy centers of gravity of the images for the upper and lower channels, respectively;

L1, Y1 - measured values of distance and offset.

To reduce the systematic error of neobhodimoje tilt photodetecting unit 1, which is implemented by the sensor 14 angle photodetection unit 1. In this case, the measured coordinates of L and Y are translated at the end the following formulas:

L=L1 cos φ

Y=Y1-L1 tg φ

where φ is the angle of the photodetector unit, equal to the position of the path level and coming from the tilt sensor.

Thus, the claimed ECO to control the spatial position of the railway track provides simultaneous control of the train paths are relative to the fiducial marks in two mutually perpendicular directions (longitudinal profile and plan) for continuous movement track machine with high precision and binding measured coordinates of the project location path.

1. Opto-electronic system to control the spatial position of the railway track, comprising at least one radiation source, the measuring trolley mounted on the track, where the processing unit and the photodetector unit, optically associated with the radiation source, characterized in that the radiation source is made with the possibility of installation on structures outside the track and located in the direction of movement of the measuring bogie, while the photodetector unit includes two receiving and analyzing systems, sensor angle fotopriemnik the block, the control module, the output of which is connected to the input of the processing unit, another input connected to the output of the sensor angle photodetection unit, and light passing through the measuring trolley radiation source, the output of which is connected to the input of the control module, each receiving and analyzing the system includes a lens and a position-sensitive receiver of optical radiation, mounted in the plane of the image analysis of the radiation source and the output of which is connected to the input of the processing unit.

2. Opto-electronic system according to claim 1, characterized in that the radiation source is made in the form of a fiducial mark, containing led, reflector and power led.

3. Opto-electronic system according to claim 1, characterized in that as the structures for mounting the radiation source use the contact network.

4. Opto-electronic system according to claim 1, characterized in that the indicator is built in the form of laser position sensor photodetector unit.

5. Opto-electronic system according to claim 1, characterized in that the sensor angle photodetection unit using the inclinometer.

6. Opto-electronic system according to claim 1, characterized in that it contains more than one radiation source.



 

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