Method and device to control railway track rails

FIELD: transport.

SUBSTANCE: invention relates to railway transport. Proposed method comprises measuring rails spacing by means of contact and contactless (laser) metres. Distances between rails measured by contact and contactless metres are compared. If discrepancy in readings of said metres falls below tolerance, mean arithmetic values is entered into memory. If discrepancy in readings of said metres exceeds tolerance for straight track section, readings of contactless metre are entered in memory. In control track curved section, track curve radius is defined.

EFFECT: higher accuracy of control.

6 dwg, 2 ex

 

The invention relates to railway transport, specifically for the travel templates.

The known method and device for measuring the distance between the rails at the request of the Russian Federation for invention №2003131043. The device contains two laser sensor. The method consists in scanning the rails and comparing the results of measuring the distance between them with valid values.

The known method and device for contactless measurement of the transverse profile and the distance between the rails way by RF patent for the invention №2255873.

Method for the contactless measurement of the transverse profile or distance between the rails path includes measurement using the scanning beams of the two laser sensors located on the mobile platform above the rails, profile rail and distance, and entering these values into a computer database, depending on the distance travelled and the determination of the deviation from the setpoint. The device contains two laser sensor, mounted on rails on the platform, and the computer to which they are connected. The system contains a sensor momentum wheel platform, performing the measurement function of the traversed path.

The disadvantage of this system is its limited functionality when the diagnosis of railway tracks, as it does not define the longitudinal and transverse to the slope of a plot of the path.

Known universal coordinate measuring pattern on the Holy of the Russian Federation for useful model №43065, publ. 27.12.2004, which includes measuring with a Vernier caliper and a manual goniometer. Disadvantages - low measurement accuracy, limited functionality, the impossibility of measuring the radius of curvature of the rail in the plan, determine the location of the measured section of the route.

Known pattern of travel by RF patent for useful model №76344, prototype. The template includes a housing, movable and stationary stops and a contact sensor for measuring the width of the track, the elevation of one rail relative to another and so on

This hand tool has a large weight and dimensions and low measurement accuracy up to 1...2 mm

The known method and portable device for monitoring the rails of the railway track in U.S. Pat. EPO No. 1039034, prototype.

This method includes the measurement using a contact sensor on the casing of the measuring Reiki, and identify deviations from the specified values, write the results into the database.

This device includes a housing measuring rods having movable and stationary stops, one of which is fixed a contact sensor connected to the electrical connections with the processor connected to the memory block.

Disadvantages no template allows you to define the radius of the rails and the location of the monitored track section, not accurately measures angles and other parameters and does not allow to transmit information to the control center.

The task of the invention is to improve the accuracy of measurement, determine the radius of rails and extension of system functionality.

These tasks have been achieved in the way of control rails of the railway track, comprising measuring the distance between the rails using a contact sensor on the casing of the measuring Reiki, and identify deviations from the specified values, a record of the results obtained in the memory block, the fact that additionally measure the distance between the rails using a non-contact sensor, such as a laser, compare the distance between the rails measured by the contact sensor, and proximity sensor when the difference between the sensor reading is below the valid memory block entered the arithmetic mean value, when the difference between the readings of these sensors is higher than allowable on the straight section of track in the memory block write indications of the proximity sensor, and when the control radius of the site rail determine the radius of rails.

The lynchpin of global positioning, for example, GPS systems

Theory ranging based on the calculation of distance teaching is the signal from the satellite to the receiver on the time delay. If you know the propagation time of the radio signal, then passed them the way easily computed simply by multiplying the propagation time of the signal at the speed of light. Each satellite of the GPS system continuously generates radio waves of two frequencies (L1=1575.42 MHz and L2=1227.60 MHz). The navigation signal is photomanipulation-tion PRN pseudo-random-code (Pseudo Random Number code). PRN code can be of two types. The first C/a-code (Coarse Acquisition code is rough code) used in civil receivers. It provides only a rough estimate of location, and therefore is called "rough" code. C/a-code is transmitted on the L1 frequency using phase manipulation pseudo-random sequence of length 1023 characters. Error protection is provided by code of Gould. The repetition period of C/a code is 1 MS. Another code - R (precision code is the exact code) provides a more accurate calculation of coordinates, but the access is restricted. Basically the P-code is available to the military and (sometimes) Federal services (for example, for solving problems of geodesy and cartography). This code is transmitted on the L2 frequency with the use of extra-long pseudo-random sequence with a repetition period of 267 days. This code is available, in principle, and civilians. But the algorithm processing is much more complex, and therefore the equipment is more expensive. In turn, the frequency of L1 is moduliruetsya as With/And and P-code. The GPS signal may be present and the so-called Y-code, which is the encrypted version of the P-code (military time system encryption may vary).

In addition to the navigation signals, the satellite continuously transmits various kinds of service information. The user GPS receiver is informed about the state of the satellite and its parameters: system time; ephemeris (accurate data about the orbit of the satellite); the predicted time delay of the signal propagation in the ionosphere (because the speed of light changes when passing through different layers of the atmosphere), the health of the satellite (in the so-called "almanac" contains updated every 1...5 min status information and the orbits of all satellites). This data is passed.

The basis of the GPS receiver is calculating the distance from it to several satellites, the location of which is known (these data are taken from the GPS satellite almanac"). In surveying the method of calculating the position of the object by measuring its distance from the points with the given coordinates is called "triangulation with measured lengths".

If you know the distance to one satellite, the coordinates of the receiver cannot be determined (it may be located at any point on the sphere radius, described around the satellite).

Let the known distance of the receiver from the second satellite. E is th case of determination of coordinates is also not possible - the property is located on a circle which is the intersection of two spheres. The distance to a third satellite reduces the uncertainty in the coordinates of the two points. This is enough to uniquely determine the coordinates is the fact that of the two possible locations of the receiver, only one is on the Earth's surface (or close to it), and the second, false, turns out to be either deep inside the Earth, or very high above its surface. Thus, for three-dimensional navigation theoretically enough to know the distance from the receiver to 3 satellites.

The invention is illustrated in the drawings, figure 1...6, where:

- figure 1 shows the design of the device,

- figure 2 shows the section a-a,

- figure 3 - measurement of the transverse slope of the road,

- 4 - section b-B,

- figure 5 is an electric diagram of the device

- figure 6 - diagram of the information retrieval.

The device (1...6) is designed to measure the distance between the rails 1 and includes a housing measuring rods 2 and the contact sensor 3. On the casing of the measuring Reiki 2 with one hand is stationary stop 4, and on the other, the movable stop 5, mounted in the slots 6, made in the casing of the measuring Reiki 2. Movable stops 5 are biased by springs 7 mounted in blind holes 8 in the side, opposed the second fixed fence 4. In the gap 6 has a switch 9 with the normally-open contacts 10. On the fixed stop 4 in its middle section, on the line of the longitudinal axis of the device has a roller 11, the movable stop 5 symmetrically relative to the longitudinal axis of the device is equipped with two roller 12. Between the rollers 12 on the longitudinal axis of the device is set to the contact sensor 3.

On the casing of the measuring Reiki 2 is optional contactless sensor 13, such as a laser rangefinder, and a processor 14, is attached to the electrical connections 15.

The processor 14 is attached electrical connections 15 memory block 16 is attached to the external electrical connector 17, and the receiving device is a global positioning system 18. The electrical connector 17 is designed for the removal of information from the memory unit 16 to an external computer or in flash memory.

The receiver is a global positioning system 18, such as GLONASS or GPS, radio channel 19 is connected simultaneously with three satellites system 20 being in orbit. Inside measuring rods 2 is a power supply unit 21, for example batteries, United conductive springs 22 and insulated electrically insulating spacers 23 from the housing of the measuring rail 2. To the power source 21 is connected electrical connections 15 contacts 10, the SW itch 9, the processor 14 and other energy consumers (figure 1). The casing of the measuring Reiki 2 is closed by a cover 24 (Fig 1 and 2), made of a radiotransparent material, such as plastic, for reception by the receiver of the global positioning system 18. The proximity sensor 13 includes a bracket 25 mounted perpendicular to the body measuring rods 2 and is (if you use a laser rangefinder) for shaping the laser beam 26 in the direction of one of the rails 1 and receiving the reflected signal to measure the distance of the sensor to the rail 1 (distance, 3). The device may include a display 27 that displays the measured information, connected to the processor 14, and the signal light 28 that are triggered when a malfunction of the device, for example, when a large difference in the results of measuring the distance between the rails 1 (straight track).

In addition, the device may contain one or two accelerometers 29 for determining the spatial orientation of the portable device (longitudinal and transverse tilting the device) and is connected to the processor 14 through the controller 30 (figure 5 and 6). The placement of the accelerometer 29 on the casing of the measuring Reiki shown in figure 3. Subsequently treated with the device using two-component accelerometers 29 (figure 5 and 6). In addition, the device is in can contain a magnetometer 31, connected through the controller 30 to the processor 14. Magnetometer 31 is designed to determine the azimuthal orientation of the housing of the measuring rail 2, and therefore, the rails 1.

Device (6) can be equipped with a system for reading information on the distance along the channel 19. This device is equipped with a receiving and transmitting device 32 connected to the processor 14 for receiving and transmitting device 32 connected to the antenna 33. Remote control device 34 includes a stationary receiving-transmitting device 35 that is connected to the antenna 36 and the server 37.

Work with the measuring device is carried out as follows (figure 1).

On straight sections of railway track when the case is installed, measuring rods 2 on one of the rails 1 fixed focus 4 is applied to one of the rails 1, and the roller 11 abuts the first rail 1. Then the movable stop 5 is introduced into contact with the other rail 1, and the rollers 12 are in contact with the second rail 1 and the contact 10 is closed, and the electric energy from the power supply unit 21 is supplied to all electronic components of the device, including a processor 14. The proximity sensor 13 (laser) periodically delivers the laser beam 26 onto the surface of the second rail 1 is attached to the movable stop 5, and determine the distance along the OS the device. When a small discrepancy between the testimony of contact and non-contact sensors 3 and 13 in the memory record readings proximity sensor, as more accurate. In case of significant discrepancy between sensors 3 and 13, the processor sends a signal to the signal lamp 28. After that, you must find the cause of the discrepancies between the results of measurements, this should make adjustment (alignment sensors 3 and 13 on the stand, imitating track).

As the distance between the proximity sensor 13 and a fixed stop 4 strictly fixed, calculates the distance between the rails 1 by the formula L=B+C.

This information is stored in the memory unit 16 with reference to the distance traveled, if applied to the receiver global positioning 18. The position of the measuring body Reiki 2 with an accuracy of 1...2 m is determined by the global remote positioning GLONASS or GPS. The receiver of the global positioning system 18 receives the signal with at least three satellites of the system 20 and determines the location of the chassis measuring rods 2 with an accuracy of 2 meters, These data are transmitted to the processor 14 and further to the memory block 16.

Then a comparison of the distances between the rails 1, measured by the sensors 3 and 13. When exceeding the maximum allowable difference signal on galinou light bulb 28, and for the record in the memory unit 16 is transmitted to the signal received from the proximity sensor 13, as more accurate and reliable. But at the same time, you must find out the cause of the discrepancies between the sensors 3 and 13 (make adjustment on the stand rail simulator and configure both sensors).

Simultaneously accelerometers 29 (figure 4) measure the transverse and longitudinal inclinations of the body measuring rods 2 (angle φ1 and φ2). These values are also compared with the maximum allowable.

Information from the memory unit 16 can be removed in two ways.

1. The electrical connector 17 (Fig 1, 5, and 6) connect the computer or flash memory and rewrite on this computer (flash memory).

2. If necessary, you can transfer information from the memory unit 16 during the whole time of her move in process control for the prevention of railway track on the remote control device 34 through a transmitting / receiving device 32 and 35 and their antennas 33 and 36 on channel 19 (6).

If there magnetometer 31 (figure 5 and 6) is fixed azimuthal position of the slats 2 and, consequently, the rail 1 through the controller 30 is transmitted to the processor 14 and then in the memory unit 16. These data can be used to calculate the radius of curvature in the plane of the rails of the railway track.

The definition of the radius of the rail train p is t.

When installing the chassis Reiki 2 in radial section, the distance between the rails 1, as measured by the contact sensor 3 will always be less than the measured proximity sensor 13, i.e.,

L0≤L1

The processor 14 calculates the radius of curvature of the outer rail 1 (figure 4) on the basis of similarity of triangles by the formula

where D is the distance between the rollers 12,

L0 is the distance between the rails 1, measured by the sensor 13,

L1 is the distance between the rails 1, measured by the sensor 3.

Relatively easy to program the processor 14 for performing calculations to determine the radius of curvature of the rail 1 in the plan at a given point. By performing several measurements of R on desired section of road using a processor 14, it is possible to determine the average value of R cf.

Example 1

Implementation of devices on straight track at an acceptable discrepancy between the readings of two sensors

L STD = 1435 mm

L0 = 1436,2 mm

The accuracy of measurement, and L0=0.1 mm

L1=1436,4 mm

The accuracy of measurement, and L0=0.05 mm

The maximum difference in the readings of the sensors 3 and 13 adopted 0,2 mm

In the memory block included the average of the readings of two sensors

Example 2

Implementation of device pemoline the s part of the way when an invalid discrepancy between the readings of two sensors

L STD = 1435 mm

L0 = 1436,25 mm

The accuracy of measurement, and L0 = 0,1 mm

The control method of the rails of the railway track, comprising measuring the distance between the rails using a contact sensor on the casing of the measuring Reiki, and identify deviations from the specified values, a record of the results obtained in the memory block, characterized in that it further measure the distance between the rails using a non-contact sensor, such as a laser, and compare the distance between the rails measured by the contact sensor, and proximity sensor when the difference between the sensor reading is below the valid memory block entered the arithmetic mean value, when the difference between the readings of these sensors is higher than allowable on the straight section of track in the memory unit record readings proximity sensor and when the control radius of the section of rails define the radius of the rails.



 

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