The device for technical diagnostics of railway track

 

(57) Abstract:

Use: mobile instrumentation laboratories. The inventive device includes a high-frequency generator, a switch, eddy current probe, four of the amplitude detector, four compensator voltages, three adder, six vychitala, bipolar detector, seven large-scale amplifiers, dual peak detector, comparator, the pulse shaper zero and two memory block, the Converter consists of two pairs of coils placed in parallel overhead planes and made in the form of elongated rectangular winding, the coils of each pair together with each other on one of the long bases, forming longitudinal axis pairs, as the pair face each other with their longitudinal axes perpendicular to and aligned with the centers of the vertical axis of symmetry of the transducer, the outputs of the second, fourth, fifth, and seventh amplifiers, the third adder and the sixth vicites are informational outputs of the device. 5 Il.

The invention relates to a device for contactless control geometricheskogo provisions threads rails, gaps in the on-measurement laboratories railway transport as in statics, and dynamics.

A device for technical diagnostics of railway track, comprising a generator of high frequency, eddy current probe, made in the form of a pair of identical coils placed in a single plane, two of the amplitude detector and connected to each of them one compensator voltages, forming two measuring channels, electrically connected with the coils of the Converter and the adder, myCitadel and large-scale power.

The functionality of this device is limited to measuring no more than two parameters: offset rails project from its position in terms of wear of the side surface of the rail head. Accurate control of these parameters is low, since the measurement result is affected by the shift rails in the profile, wavy wear (short roughness) of the surface of the rail and the unevenness quantities gaps excess of the rails at the joints. In addition, the test validity is also questionable, since each of the inductors measures essentially many settings, and in different cross sections of the rail due to structural bias coils along the PE the include options.

The essence of the proposed solution lies in the fact that in a device comprising a generator of high frequency, eddy current probe, made in the form of a pair of identical coils placed in the same plane, the first and second amplitude detectors connected to the coils, respectively, the first and second joints of the stresses associated with the inputs to the outputs of the amplitude detectors, and the adder, myCitadel and large-scale power entered the switch, optionally, a second pair of identical coils placed in the same plane, the third and fourth amplitude detectors and the third and fourth joints stress, as well as two adder, five vychitala, six large-scale amplifiers, bipolar detector, dual peak detector, two blocks of memory, a comparator and a pulse shaper zero, with each of the pairs of coils are wound in the form of elongated rectangles, closely attached to each other along one of the long sides, forming longitudinal axis of the pair of coils, and a pair of coils placed in parallel planes perpendicular to each other by their longitudinal axes and combined intramuscle inductance, the third and fourth amplitude detectors inputs connected to the third and fourth inductors, and outputs associated with the third and fourth joints stress, respectively, the output of the first compensator is connected with the first inputs of the first adder and myCitadel, the output of the second compensator is connected to the second inputs of the first adder and myCitadel, the output of the third compensator is connected with the first inputs of the second adder and myCitadel, the fourth output of the compensator is connected to the second inputs of the second adder and myCitadel, and the output of the first adder connected to the first inputs of the third and fourth vychitala, the output of the second adder is connected via the first large-scale amplifier with a second input of the third myCitadel, the output of which is connected to the input of the second large-scale amplifier, the output of the first vicites connected to the first input of the fifth myCitadel, the output of the second large-scale amplifier is connected through the third large-scale amplifier with a second input of the fourth vicites and through the sixth large-scale amplifier with a second input of the fifth myCitadel, the outputs of the fourth and fifth vychitala connected respectively to the inputs of the fourth and fifth large-scale amplifiers, the output of the second visitate what about connected through first and second channels of the peak detector with the first inputs of the first and second memory blocks, the first bipolar output of the detector is connected through a comparator to the input of pulse shaper zero, the outputs of which are connected to second inputs of memory blocks, the first and second outputs of the first memory block is connected to the first input of the third adder and the sixth myCitadel, and the outputs of the second memory block is connected to the second input of the third adder and the sixth myCitadel, the outputs of the second, fourth, fifth, and seventh scale amplifiers, the third adder and the sixth vicites are informational outputs of the device.

The technical result of the invention is the provision of safety of railway transport by increasing the volume and quality measurement information about the state of the upper structure of the track. The measured parameters are: side wear of the rail head and offset rails project from its position in the profile h; shift rails project from its position in terms of x; short bumps rails hn; the excess of the rails at the junction of the hc; the gap in the rail junction. In Fig. 1 shows the structural diagram of the device of Fig. 2 placing the transducer over the rail on the installation height hoin the body, characterizing hag rails at the junction and the value of the gap in the junction from the relative width of the coils of Fig. 5 - rail the thread with typical joints, the output characteristic of the transducer from the settings interface and chart of the circuit operation zero information on the joint. The device comprises (Fig.1) generator 1 high frequency, the switch 2 through which the generator 1 supplies the coil 4-7 inductance of the Converter 3, four amplitude detectors 8-11, four compensator 12 to 15 stresses, three adder 16-18, six vychitala 19-24, bipolar detector 25, seven large-scale amplifiers 26-32,dual peak detector 33, a comparator 34, the driver 35 of the reset pulse and two blocks 36 and 37 memory. The inputs of the amplitude detectors 8-11 connected respectively to the coils 4-7 inductance, and the outputs of the detectors 8-11 to the inputs of the expansion joints 12-15 voltages, respectively. The output of the first compensator 12 is connected with the first inputs of the first adder 16 and myCitadel 19, the output of the second compensator 13 is connected to the second inputs of the first adder 16 and myCitadel 19, the output of the third compensator 14 is connected with the first inputs of the second adder 17 and myCitadel 20, the output of the fourth compensator 14 is connected to the second vegametvoltage of vychitala 21 and 22, the output of the second adder 17 is connected through the first amplifier 26 to a second input of the third vicites 21, the output of which is connected to the input of the second amplifier 27, the output of the first vicites 19 connected to the first input of the fifth vicites 23, the output of the second amplifier 27 is connected through the third amplifier 29 to a second input of the fourth vicites 22 and through the sixth amplifier 31 to a second input of the fifth vicites 23, the outputs of the fourth and fifth vychitala 22 and 23 are connected respectively to the inputs of the fourth and fifth amplifiers 29 and 30, the output of the second vicites 20 is connected to the inputs of the seventh amplifier 32 and bipolar detector 25, the first and second outputs of which are connected through first and second channels of the peak detector 33 with the first inputs of the first and second blocks 36 and 37 of the memory, the first bipolar output of detector 25 is connected through a comparator 34 with the input of the shaper 35 pulse reset, the outputs of which are connected to the second blocks 36 and 37 of the memory, the first and second outputs of the first block memory 36 is connected to the first input of the third adder 18 and the sixth vychitala 24, and the outputs of the second memory block 37 is connected to the second input of the third adder 18 and the sixth vicites 24, the outputs of the second, fourth, the fifth and seventh scale will increase the>The switch 2 is designed to eliminate electromagnetic interference coils 4-7 inductance, which is achieved by alternately connecting each of the coils 4-7 fed to their generator 1.

The switch 2 is controlled by a reference voltage from a clock generator (Fig. not shown). The switching frequency is selected as the adequacy of time survey information from each of the coils 4-7. For example, if the switching frequency is 100 kHz resolution time of the survey information from one coil will be equal to 10 μs. During this time, the inverter 3, moving with a speed of 150 km/h along the rails, will be held a distance of about 0.45 mm, and the four coils 4-7 this distance will increase to 1.8 mm

Eddy-current Converter 3 is designed to convert the measured parameter into an electrical signal. Structurally, the Converter 3 consists of two pairs of coils of 4.5 and 6.7 inductance (Fig. 2,3) placed in parallel overhead planes (ideally, when the plane pairs combined). Each of the coils 4-7 wound in the form of an elongated rectangle, and the coil of 4.5 first pair of coils 6,7 of the second pair of occluding each other in one of the long sides, forming longitudinal OS is but to each other by their longitudinal axes y-Y and x-X and combined centres along the vertical axis Z-Z symmetry of the Converter 3. To ensure electromagnetic noise immunity and protection against mechanical impacts Converter 3 is placed in a metal screen (Fig. not shown). The ratio of the geometric dimensions of the coils 4-7 recommended to choose within xobao, 3yol3aowhere b is the width and l the length of the coils 4-7; xothe maximum value of the shift rails in the plan, corresponding to the state standards; andostandard transverse thickness of the head of the rail which corresponds to GOST; yo- the maximum permissible value of the gap in the joint, corresponding to the state standards.

Compensators 12-15 stresses designed to compensate for the level of initial voltages Uoi(i 1,2,3,4 number of coils), corresponding to the voltages on the coils 4-7 at 0; h 0; x 0; hn= 0; hc= 0; y 0. Compensators 12-15 represent blocks collected on operational amplifiers, the input of which is transmitted through the amplitude detectors 6-11 modulated measured parameters voltage coils 4-7, and the second input serves the reference voltages Uofrom a clock generator (Fig. not shown) whose value is set by the value corresponding to the voltage values is law, caused by switching, with a different bandwidth of the useful signal with minimal distortion at the outputs of the joints 12-15 enabled or capacity of certain size, or in the feedback circuit of operational amplifiers included filters.

Bipolar detector 25 is designed for rectifying the AC voltage coming from the transmitter 20, and divide it into different, and the dual-peak detector 33 for selecting the maximum values of the levels of different voltages coming from the detector 25. Bipolar and peak detectors 25 and 33 are assembled, for example, the diodes included in the bipolar detector 20 in parallel-out-of-phase, dual peak detector 25 parallel-single-phase.

The comparator 34 and the imaging unit 35 pulse reset represent a scheme of resetting the device and are designed to reset the preceding information, the junction (hc,y) before the next junction, which eliminates overlap at the next intersection information of the preceding joints. A comparator connected to the first output of the bipolar detector 25, which first formed the leading edge of the output voltage of vicites 19 when the accepted direction of movement of Preobrazovatel the necessary input of the comparator 34 to switch from the first to the second output bipolar detector 25, because when the opposite movement of the character of the output characteristic of vicites 20 at the junction of the mirror will change, and the former rear front will be the front.

The blocks 36 and 37 of the memory are used for storing information on a joint on the time required for processing the junction to another junction.

The technical result of the invention is the securing of the rail traffic by receiving regular information about the condition of the superstructure, which is achieved by the introduction of functional blocks, additional inductors, their design, turning, positioning and switching.

Eddy-current Converter 3 is situated above the rail is stationary and normally to its surface on the installation height hoand the inverter 3 are oriented above the rail so that the longitudinal axis of one of the pairs of coils of 4.5 or 6.7 coincided in the plan with the project position the longitudinal axis of the rails (Fig. 3 axis u-U).

With generator 1 is supplied via a switch 2 high-frequency voltage to the coil 4-7 inductance. When the flow through the coil 4-7 high frequency currents around each of them Sasaki, causing the coils 4-7 secondary elektrodvigun force. In General, the magnitude of the secondary EMF in each coil 4-7 all depends on six parameters: and wear of the rail head; h, x shift rails in the profile and the plan from the design position; hnshort bump threads; hcexceeding the rails at the junction and y gap in the rail joint, but the sensitivity of the coils 4-7 different to these parameters as a result of constructive solutions, and relative position and orientation over the rail. So coil 4,5 the most sensitive to changes of the parameters h and x due to the greater area overlapping the surface of the rail, but less sensitive to changes in parameters hnhcand y. In addition, the coil 4, and 5, depending on which one is placed at the inner side of the rail, for example, the coil 5, is additionally sensitive to the parameter and since the inner side of the rail head wear from friction efforts with the wheel flange of the car with a contact to the dynamics. Coils 6,7 the most sensitive to changes in parameters hnhcand DNA is less sensitive to changes in x, h.

When hc0 and y 0, i.e., in the intervals between joints, voltage R>< / BR>
< / BR>
where Uoithe initial voltage and 0, h=0, h 0, hn0, i 1,2,3,4;

the slope of the output characteristic of the Converter h;

sensitivity to change of the parameter x and a;

sensitivity to change of the parameters h and hn;

sensitivity to change of the parameter a.

Voltage Uiwith amplitude detectors 8-11 served on the joints 12-15, in which the values of the initial stress compensated, and at the outputs of adders 16,17 and vychitala 19 and 20 of the received voltage in the form of:

< / BR>
< / BR>
< / BR>
A joint decision of four independent equations (5)- (8) with four unknowns a, h, x, hngives the following dependencies:

and [(U1+ U2) (U3+ U4)K1]K2(9)

h [(U1+ U2)- aK3]K4(10)

x [(U2- U1) aK6]K5(11)

hn= (U3-U4)K7(12)

where Kj- constant coefficients, obtained as a result of joint solution of the equations (5) and (8), with the numerical values of the coefficients are provided in seven large-scale amplifiers 22-35, j 1-7. Voltage U1and U2from the outputs of the joints 12 and 13 are formed in the first adder 16 and deducted in the first wichitafalls second myCitadel 20. The amount of voltage (U1+ U2and U3+ U4), the latter multiplied by a gain K1the first large-scale amplifier 26, are received at the inputs of the third vicites 21, and the thus obtained difference is multiplied by the gain K2the second large-scale amplifier 27, is a transformation (9), unambiguously, i.e. always the same sign, which characterizes the magnitude of lateral wear and the rail head. For the parameters h, h, hnare similar to converting voltages U1U4in the processing circuit (Fig. 1) then get the expression (10) (12), the sign of the polarity of which is judged on the top or bottom, left or right displacement of the thread from the design position.

Subtraction of the voltages U3and U4in the second myCitadel 20 allows you to select the voltage-dependent changes of the parameters hcand.

If a rail thread in the junction of the straight line, i.e., hc= hn= 0, then the output of vicites 19 voltage will be described as a function of the value y of the butt joint U19(h = 0) = f(y), and the nature of the change of the voltage when the accepted direction of movement of the transducer 3 by the arrow (Fig.5) will have the shape of the curve 1 in Fig. 4.cexceeding the rails at the junction of U19(y = 0) = f(hc), and the nature of the change of the voltage at the condition of the negative sign of hcon the 1st junction (Fig.5) will have the shape of the curve 2 (Fig. 4). On the 2nd junction rails polarity of hcpositive.

While change hcand y the output voltage vicites 19 is a function of the parameters hcand y U19= f(hc, y), the nature of the change which would be the curve 3 (Fig.4).

Dependency analysis 1,2,3 allows to conclude that the sum modulo different amplitudes U19and-U19(scale) curve 3 is equal to the amplitude (magnitude) of the curve 1 and is determined by the change in the value y and the difference modulo different amplitudes +U19and-U19determines the change in the value of hc..

The voltage U19c output of the second vicites 20 (curve 3 of Fig. 4 and 5) is fed to the input of a bipolar detector 25, the first and second bipolar outputs which received two different voltage +U19and-U19. These stresses are served on the first and second channels of the peak detector 33. With the dual outputs of the peak detector 33 of the voltage received at the first inputs of perogi associated with the first input of the third adder 18 and the sixth vicites 24. As the voltage of the blocks 36 and 37 of the memory, proceed to the adder 18 and myCitadel 24 different, the adder 18 is the subtraction of different stresses [+U19+ (-U19)] U5and myCitadel 24 the operation of addition of different stresses [+U19- (U19)] U6. Therefore, the output of the third adder 32 receives the voltage U5the amplitude and polarity of which is judged on the value and sign of excess hcin the rail junction, and the output of the sixth vicites 24 receives the voltage U6amplitude which clearly judge the size of the gap y.

Since the proposed device, the circuit is provided to the memory data interface, along with it provides and the circuit reset this information, i.e., the reset information about the parameters of hcand y before the next junction. For this first bipolar output of the detector 25 to the input of the comparator 34 is energized U19. From the output of the comparator 34, the actuation voltage that is set at a certain level input voltage + U19served on the input of the shaper 35 reset pulse, the first and second outputs of which are connected with the second inputs of the first and second blocks 36 and 37 memory. camping at the time of input of the measuring transducer 3 at the next junction on the leading edge of the curve 3.

The technical result of the invention is the simultaneous measurement of one side of the wear of the rail head, the displacement of rail lines in plan and profile from the design position, short bump threads, over rail joints and gaps in the rail joints, which allows on the one hand to guarantee the safety of rail transport, with another to determine the degree of road accidents.

The device for technical diagnostics of railway track, comprising a generator of high frequency, eddy current probe, made in the form of a pair of identical coils placed in a single plane, the first and second amplitude detectors connected to the coils, respectively, the first and second compensators stress related inputs to the outputs of the first and second amplitude detectors, the adder, myCitadel and large-scale amplifier, characterized in that it introduced the switch, the third and fourth amplitude detectors, third and fourth joints stress, two adder, five vychitala, six large-scale amplifiers, bipolar detector, dual peak detector, two blocks of memory, comparator and formulate what s in a single plane, when this coil is wound in the form of elongated rectangles and premnote each other closely, in each pair one of the long sides, forming longitudinal axis of the pair of coils, and a pair of coils placed in parallel planes perpendicular to each other by their longitudinal axes, and their centers are aligned and are located on the vertical symmetry axis of the Converter, the switch connected between the high-frequency generator and the first, second, third, fourth inductors of the Converter, the third and fourth amplitude detectors inputs connected to the third and fourth inductors, and outputs associated with the third and fourth joints stress, the output of the first compensator is connected with the first inputs of the first adder and myCitadel, the output of the second compensator is connected with the second inputs of the first adder and myCitadel, the output of the third compensator is connected with the first inputs of the second adder and myCitadel, the fourth output of the compensator is connected with the second inputs of the second adder and myCitadel, and the output of the first adder connected to the first inputs of the third and fourth vychitala, the output of the second adder is connected via the first large-scale amplifier with the second I is the reader connected to the first input of the fifth myCitadel, the output of the second large-scale amplifier is connected through the third large-scale amplifier with a second input of the fourth vicites and through the sixth large-scale amplifier with a second input of the fifth myCitadel, the outputs of the fourth and fifth vychitala connected respectively to the inputs of the fourth and fifth large-scale amplifiers, the output of the second vicites connected to the inputs of the seventh scale amplifier and bipolar detector, the first and second outputs of which are connected through first and second channels of the peak detector with the first inputs of the first and second memory blocks, the first bipolar output of the detector is connected through a comparator to the input of pulse shaper zero, the outputs of which are connected to second inputs of memory blocks, the first and second outputs of the first memory block is connected to the first input of the third adder and the sixth myCitadel, the outputs of the second memory block is connected with the second input of the third adder and the sixth myCitadel, and the outputs of the second, fourth, fifth, and seventh scale amplifiers, the third adder and the sixth vicites are informational outputs of the device.

 

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