The method of measuring the drawdown of rail lines

 

The invention relates to the control of the state Railways. The method of measuring the drawdown of rail lines is that measured by the gyroscopic system current orientation angles of the car body relative to the horizon and with the help of sensors Buchs - body current position of the box relative to the body. On the basis of the received information to produce the current values of the corners of the cross-level and longitudinal slope, which then average on the basis of the car, getting the current average values of the corners of the rail track. The current values of drawdown receive the difference between the current values of the relative provisions Buchs measuring wheelset, redesigned to the virtual position of the body, parallel to the current average position of the rail track and the current distances Buchs - body computed taking into account the orientation of the measuring bogie relative to the virtual position of the body potenzmitteln of the car. The technical result of the invention is to develop a single-point measurement method drawdown, with uniform amplitude-frequency characteristic in the passband. 1 Il.

The invention relates to monitoring the condition of the railway track.

The known method of measuring the drawdown of rail lines [1], which consists in the fact that measured for each rails the difference between the vertical displacements of the respective wheels measuring truck potenzmitteln of the car.

The disadvantage of this method is the use of bordovogo method, therefore, the transfer - length roughness), and the amplitude-frequency characteristic uneven bandwidth (see the drawing), i.e., measurements are only qualitative in nature.

The objective of the invention is to develop a single-point measurement method drawdown, with uniform amplitude-frequency characteristic in the passband.

To solve the problem in the method of measuring the drawdown of rail lines, the current values of drawdown receive the difference between the current values of the relative provisions Buchs measuring wheelset, redesigned to the virtual position of the body parallel to the current average position of the rail track and the current distances Buchs - body computed taking into account the orientation of the measuring bogie relative to the virtual position of the body potenzmitteln of the car.

The technical essence of the invention is explained in the following. Under the drawdown understand roughness of rail lines in the longitudinal plane [1]. A more precise definition, according to the authors, is: drawdown is the roughness of each of the rail lines in the longitudinal plane with respect to the average level of each thread. Or, in other words, the drawdown is equal to the change in vertical put the o what to occupy such a position of the body is possible only in the virtual space. To do this, first consider the mechanism of measurement of cross-level and longitudinal slope of the track.

The mutual position of rail lines by levelh is determined by the angle of transverse inclination of the trackp

where l is the width of the gauge.

The tilt of the car body relative to the horizon, get on the testimony of the gyroscopic system is determined by the expression

whereRelthe angle of inclination of the car body relative to the plane of the rail, as measured by the sensors Buchs - body measuring wheel pair.

From (2) follows

where ld- the distance between the points of attachment of sensors Buchs - body measuring wheelset, for example, the first.

The angle of the longitudinal slope is defined

whereki- the angle of the car body relative to the horizon, measured gyroscopic system,pairs (or first and third), b - base of the wagon.

After the current averaging on the basis of car, obtain

whereml- step odometer (distance sensor).

Expression (5) describe the plane that is parallel to the middle rail track. The current deflection of the car body from the plane of the middle gauge is defined as

Then the drawdown left rails (in the direction of the car), taking into account the smallness of the values of angles will be determined by the expression

and drawdown right rails

where l0distance from Buchs to the body in a static position when the body is parallel to the rail track.

Thus, with the passing of one wheel pair is measured roughness in the longitudinal plane, which is often interpreted as short drawdown. Long drawdown can be defined by building according to the changes of the middle angles from the longitudinal gauge coordinates (path).

Literature

1. Wagon-potenzmittel CRI-4. Technical description. EIMN. 663511.001 t0. - M., 1996.

Claims

The way to change the orientation angles of the car body relative to the horizon and with the help of sensors Buchs - body - current provisions Buchs wheelset relative to the body, then on the basis of the received information to generate the current values of the corners of the cross-level and longitudinal slope of the rail track, wherein averaging the current values of the corners of the cross-level and longitudinal bias on the base of the car, get the current average values of the angles of a rail track, and the current values of drawdown receive the difference between the current values of the relative provisions Buchs measuring wheelset, redesigned to the virtual position of the body, parallel to the current average position of the rail track and the current distances Buchs - body, calculated taking into account the orientation of the measuring bogie relative to the virtual position of the body potenzmitteln of the car.



 

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FIELD: railway transport; measuring facilities.

SUBSTANCE: invention relates to special purpose devices for measuring separate geometric parameters of reinforced concrete ties, i.e. propelling and canting of rail flats on reinforced concrete ties. Proposed device contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3, third support screw 7 and fourth support screw 8 are installed on left-hand support 4, right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, sensor 11 is secured on first support screw 5. Housing 1 carries also right-hand orientation handle 13 with pushbutton 15 and left-hand orientation handle 14. Base 16 is fastened in central part of housing 1, controller 17 and supply compartment 18 being secured on base 16. Device for measuring rail flat canting contains housing 1 with fitted-on transport handle 2, right-hand support 3 and left-hand support 4. First support screw 5 and second support screw 6 are installed on right-hand support 3. And third support screw 7 and fourth support screw 8 are installed on left0hand support 4. Right-hand catcher 9 and left-hand catcher 10 are installed on ends of housing 1, first sensor 11 is secured on first support screw 5, and second sensor 19 is installed on fourth support screw 8. Housing 1 carries right-hand orientation handle 13 with pushbutton 15, and left-hand orientation handle 14. Base 16 with fitted-on controller 17 and supply compartment 18 is secured in central part of housing 1. Moreover, support 21 is connected to housing 1 through vertical rods in central part.

EFFECT: improved efficiency of measurements, increased accuracy and provision of operative measurement of parameters under checking.

3 cl, 2 dwg

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