KR100604372B1 - The method for computation diameter of railway wheel - Google Patents

Abstract

The present invention relates to a railway wheel diameter calculation method.

The railroad wheel diameter calculation method of the present invention comprises the steps of: measuring the curvature shape of the wheel using a measurement sensor of the shape measuring unit of the tread shape measurement system; Smoothing the curvature shape data of the wheel measured through an analysis function of a data processing apparatus of the tread shape measurement system; Selecting two arbitrary points A and B from the smoothed data to obtain a straight line distance a between the two points; Obtaining a distance (v) between a center point (C) of the two points (A, B) and a smoothed point perpendicular to the center point; And calculating the radius R of the wheel by substituting the values of (a) and (v) into the equation for obtaining curvature.

Therefore, according to the railway wheel diameter calculation method of the present invention, the curvature of the wheel is analyzed and calculated using the wheel curvature shape measurement data measured by the rail wheel tread shape measurement system, and the actual wheel diameter is calculated through the calculated curvature. By calculating, there is an excellent effect that can improve the efficiency for the analysis and management of the curvature and diameter of the railway wheel compared to the conventional.

Railway wheel, wheel diameter, wheel curvature measurement, shape measuring instrument

Description

The method for computation diameter of railway wheel

1 is a perspective view of a conventional wheel diameter measuring instrument.

Figure 2 is a schematic view showing a railway wheel tread shape measurement system applied to the present invention.

Figure 3 is an exploded perspective view of the cradle and the shape measuring unit according to the present invention.

Figure 4 is a state diagram showing the initial position setting of the tread shape measurement system according to the present invention.

5 is a block diagram showing the calculation process of the wheel diameter according to the present invention.

6 is a graph showing wheel circumferential shape measurement data and data after smoothing according to the present invention;

7 is a diameter calculation coordinates for calculating the wheel diameter of the present invention.

Explanation of symbols on the main parts of the drawings

50. Wheel face shape measurement system

51. Cradle 52. Electromagnet

53. Mounting rod 60. Shape measuring part

61. Upper Encoder 62. Lower Encoder

63. Measuring sensor 64. Initial setting hole

65.Hinge 66.Hinge Body

67. Hinged member 68. Locking member

69. Hanging jaw 70. Magnet

90. Interface unit 95. Data processing unit

S100. Wheel curvature measurement step S200. Smoothing Processing Step

S300. (a) Step of obtaining a value S400. Steps to Find Smoothed Points

S500. (v) Step of obtaining a value S600. Steps to find wheel radius

S700. Step to find wheel diameter

The present invention relates to a method for calculating the diameter of a railway wheel, and more specifically, wheel curvature shape measurement data measured by a measurement sensor of a shape measuring unit of a railway wheel face shape measurement system configured to measure the shape and diameter of the wheel face of the wheel. The present invention relates to a method for calculating a diameter of a wheel wheel, which analyzes and calculates a curvature of a wheel using the same, and calculates a diameter of an actual wheel based on the calculated curvature.

In general, a wheel diameter measuring device 10 as shown in FIG. 1 is used as a measuring device for measuring the diameter of a railway wheel. In the case of the wheel diameter measuring device 10, the frame 20 mounted on a flange portion of the wheel is used. And, the support pin 30 is installed on both ends of the frame 20 and the diameter of the wheel measured by a measuring pin (not shown) is installed on the upper side of the frame 20 inwardly than the support pin 30 The dial gauge 40 is comprised.

In order to measure the wheel diameter using the wheel diameter measuring device 10 configured as described above, the operator first places the wheel diameter measuring device 10 at both ends of the frame 20 at a diameter portion of the wheel, that is, about 70 to 75 mm from the flange inner surface. After positioning the support pin 30, by reading the value measured by the measuring pin and displayed on the dial gauge 40, the conventional measurement of the wheel diameter is finished.

However, the wheel diameter measurement by the conventional wheel diameter measuring device 10 is measured by the wheel diameter measuring device 10 because only one portion of the wheel where the measuring pin of the dial gauge 40 is in contact is measured. It is very difficult to analyze the curvature of the actual wheel diameter or the roundness of the entire wheel with only the value.

In addition, in order to know the actual diameter of the wheel, an operator measures the diameter portion of the wheel several times using the wheel diameter measuring device 10 and averages it to replace the actual diameter value of the wheel with the average value. In addition to the inconvenience, there was also a problem that the reliability of the measured data value is greatly reduced.

In addition, the roundness measurement of the actual wheel is also performed by the operator using the wheel diameter measuring device 10 to measure the diameter of the wheel several times, or the support pin 30 and the measuring pin of the wheel diameter measuring device 10 at the diameter of the wheel. After contacting, rotate the whole diameter to check the shaking state of the indicator needle 41 of the dial gauge 40 within the numerical range including the error, and measure the roundness of the wheel. In addition, there is also a problem that the reliability of the measured data value is also greatly reduced as described above.

The present invention devised to solve the above problems, the wheel curvature shape measurement data measured through the measurement sensor of the shape measurement unit of the rail wheel shape measurement system configured to be able to measure the shape and diameter of the wheel surface of the wheel By analyzing and calculating the curvature of the wheel using the calculated curvature, and by calculating the actual diameter of the wheel through the calculated curvature, the purpose is to improve the efficiency of the analysis and management of the curvature and diameter of the railway wheel compared to the conventional. .

In addition, by applying the wheel diameter calculation method of the present invention to portable tread shape measurement equipment or wheel inspection equipment, it is another object to make it easy to utilize the measurement and analysis functions for the curvature, diameter and roundness of railway wheels in the field. .

The railroad wheel diameter calculation method of the present invention comprises the steps of: measuring the curvature shape of a wheel using a measurement sensor of a shape measurement unit of a wheel tread shape measurement system;

Smoothing the curvature shape data of the wheel measured through an analysis function of a data processing apparatus of the tread shape measurement system;

Selecting two arbitrary points A and B from the smoothed data to obtain a straight line distance a between the two points;

Obtaining a distance (v) between a center point (C) of the two points (A, B) and a smoothed point perpendicular to the center point;

And calculating the radius R of the wheel based on the (a) and (v) values.

The method may further include obtaining a smoothed point perpendicular to the center point C of the two points A and B, the straight line distance a.

The method may further include obtaining a diameter D of the wheel using the radius R of the wheel.

In addition, the radius R of the wheel is

의 식에 의해 산출되는 것을 특징으로 한다.

It is characterized by being calculated by the equation.

The diameter (D) of the wheel

It is characterized by calculating by the formula of D = R * 2.

EMBODIMENT OF THE INVENTION Hereinafter, the railway wheel diameter calculation method of this invention is demonstrated in detail.

Figure 2 is a schematic view showing a railway wheel tread shape measurement system of the present invention, Figure 3 is an exploded perspective view of the cradle and the shape measuring unit according to the present invention, Figure 4 is a tread shape measurement system according to the present invention This is a state diagram showing the initial position setting.

Prior to the description of the method for calculating the railway wheel diameter of the present invention, a rail wheel tread shape measurement system for measuring the radius of curvature of the wheel to calculate the diameter of the vehicle will be described.

As shown in Figs. 2 and 3, the railway wheel tread shape measurement system 50 applied to the present invention,

An arm-type measuring sensor 63 is mounted on a cradle 51 which is detachably attached to the top of a wheel by a magnetic material, and a pair of rotary encoders 61 and 62 which are installed on one side of the cradle 51 and coupled to each other. The combined shape measuring unit 60, the interface unit 90 for transmitting the data measured through the measurement sensor 63, and a program for storing, managing, and analyzing the data transmitted through the interface unit 90 It consists of a data processing apparatus 95 having a built-in.

At this time, the cradle 51 is formed in the shape of the entire shape "c", the bottom of the cradle 51, the magnetic force is turned on (on) when the power supply, the magnetic force is turned off (off) An electromagnet 52 is provided. In particular, a mounting rod 53 is installed on one side of the holder 51 to prevent the flow of the shape measuring unit 60 attached to the magnetic material, that is, the electromagnet 52, and the upper side of the holder 51 is one side. The shape measuring unit 60 is installed and fixed by the hinge 65 so that the shape measuring unit 60 is rotated 90 degrees from the holder 51.

In addition, the shape measuring unit 60 is installed on the upper end of the holder 51, the measurement sensor in the form of an arm (Arm) to a pair of rotary encoders (61, 62) coupled to each other to measure the shape of the answer surface of the wheel. (63) is coupled to the structure, in particular, the measuring range by the measuring sensor (63) as well as the wheel shape of the wheel, as well as the holder (51) by the hinge 65 so that the diameter of the wheel can be measured From this, the shape measuring unit 60 is rotated 90 degrees.

In addition, in the shape measuring unit 60, the measurement sensor 63 is the center of the holder 51, that is, the holder 51 so that accurate measurement of the shape of the wheel surface can be made through the transfer of the measurement sensor 63. It is configured to be positioned in the center between the mounting rod 53 and the mounting rod 53 formed on one side.

In addition, during the initial driving of the shape measuring unit 60, as shown in FIG. 4, the pair of rotary encoders 61 and 62 and the measuring sensor 63 are folded to set the horizontal initial position so as to set the initial position on the horizontal. Initial setting holes 64 are formed to communicate with the encoders 61 and 62 and the measuring sensor 63, respectively, and the initial setting holes of the horizontally folded rotary encoders 61 and 62 and the measuring sensor 63 are formed. By inserting a setting pin (not shown) at 64, the initial positions of the rotary encoders 61 and 62 and the measuring sensor 63 are set.

And, in the case of the hinge 65 to allow the shape measuring unit 60 to rotate 90 ° from the holder 51, the hinge body 66 is coupled to the shape measuring unit 60; A hinge coupling member 67 fixed to one upper end of the holder 51 and inserted into the hinge body 66 to be rotated; A locking member 68 formed at a lower end of the hinge body 66 to restrict the rotation of the hinge body 66 from the hinge coupling member 67 to 90 °; It is formed in the upper end of the hinge coupling member 67 is composed of a locking jaw 69 corresponding to the locking member 68 during the rotation of the hinge body 66, the locking member 68 and the locking member At both ends of the jaw 69, a magnet 70 is fixed to fix the hinge body 66 to the pivoted position.

On the other hand, the interface unit 90 is the shape measuring unit 60 and the data processing device (in order to transmit the measured data through the measurement sensor 63 drive and measurement sensor 63 of the shape measuring unit 60) 95) consists of a cable to connect.

In addition, the data processing apparatus 95 connected to the shape measuring unit 60 through the interface unit 90 may transmit data transmitted through the interface unit 90, that is, the wheel answering surface measured through the measuring sensor 63. It is a function to save, manage, and analyze the data of shape measurement of the computer.It is equipped with an analysis program that analyzes the shape of the wheel on the wheel by using the transmitted measurement data. The PDA and the like are used, and the program embedded in the data processing device 95 calculates the thickness, height, angle of inclination, etc. of the flange by measuring the data appearance and storing, outputting, DB, and measuring the shape of the wheel surface. ④ calculation of wheel diameter by measurement of curvature of wheel, ④ calculation of contact point position between rail head shape data and wheel shape data, ⑤ calculated rail head shape data and Calculating geometrical parameters contact through the contact point between the wheel position shape data, ⑥ has the analysis, such as calculating the equivalent conicity through the contact parameter of the calculation, ⑦ wheel grinding amount calculated by the calculated equivalent conicity.

The wheel diameter calculation method of this invention which calculates the diameter of a wheel using the railway wheel tread shape measurement system comprised as mentioned above is demonstrated.

Figure 5 is a block diagram showing the calculation process of the wheel diameter according to the present invention, Figure 6 is a graph showing the wheel circumferential shape measurement data and the data after smoothing according to the present invention, Figure 7 is for calculating the wheel diameter of the present invention It shows the diameter calculation coordinate.

In the wheel diameter calculation method of the present invention, as shown in FIG. 5, the step of measuring the curvature shape of the wheel by using the measurement sensor 63 of the shape measuring unit 60 in the wheel tread shape measurement system 50 (S100). )Wow; Smoothing the curvature shape data of the wheel measured through the analysis function of the data processing apparatus 95 of the step surface shape measurement system 50 (S200); Selecting an arbitrary two points (A, B) from the smoothed data to obtain a straight line distance (a) of the two points (S300); Obtaining a distance (v) between a center point (C) of the two points (A, B) and a smoothed point perpendicular to the center point (S500); And calculating the radius R of the wheel based on the (a) and (v) values (S600).

At this time, to obtain a smoothed point perpendicular to the center point (C) of the two points (A, B) straight distance (a) of the step (S400); And obtaining a diameter D of the wheel by using the radius R of the wheel (S700).

At this time, the radius R of the wheel is

의 식에 의해 산출된다.

It is calculated by the formula

delete

v: Distance from the center point of line AB to the point where it meets the current AB when the line segment vertically passing through the center point of line AB is in contact with the current AB (mm)

a is the straight line distance (mm) of line AB.

In addition, the diameter D of the said wheel is computed by the formula of D = R * 2.

The process of calculating the diameter of the wheel carried out through the wheel tread shape measurement system 50 will be described below.

Example

First, the shape measuring unit 60 including the holder 51 of the tread face shape measurement system 50 applied to the present invention is attached to the flange portion of the wheel, and then the holder is attached to the shape measuring unit 60 fixed to the wheel ( 51 ° by rotating it 90 ° from the diameter portion of the wheel, i.e., about 70-75 mm from the flange inner surface, and then placing the measuring sensor 63 of the shape measuring part 60 along the outer circumferential surface of the answering surface. ) And about 100-120mm by slowly moving to measure the curvature for the calculation of the wheel diameter (S100).

The curvature shape data of the wheel measured as described above is transmitted to the data processing device 95 of the tread surface shape measurement system 50, and the measurement of the wheel measured through the analysis function of the analysis program built in the data processing device 95. The curvature shape data is smoothed (S200). At this time, the smoothing process of the measured curvature shape data of the wheel is a technique of forming a curvature shape with an average value of the small deviations of the measured data. After acquiring the curvature shape data of the smoothing wheels through the smoothing technique, as shown in FIG. 7, arbitrary two points A and B are selected from the curvature shape data of the smoothed wheel as described above, and thus the linear distances of the selected two points. To obtain (a) (S300), the straight line distance (a) of the two points is obtained by using the formula for calculating the straight line distance to any two points in the unmarked arc state.

Further, as described above, in addition to the straight line distance a of the two points, a smoothed viscosity perpendicular to the center point C of the straight line distance a is obtained (S400) and the center point C of the two points A and B. ) And the distance v between the smoothed point perpendicular to the center point (S500). At this time, the formula for calculating the distance v between the smoothed point perpendicular to the center point is not shown.

에 대입하여 차륜의 반경(R)을 구하게 된다(S600).In addition, the distance (a), which is the straight distance obtained through the previous step, and the distance between the center point C of the two points A and B and the smoothed point perpendicular to the center point, are (v) to find the curvature, that is,

The radius R of the wheel is obtained by substituting for (S600).

Only the radius (R) value of the wheel obtained through the above process may be calculated (S600), or doubled to the radius (R) value of the wheel calculated as described above. The diameter D of the typical wheel may be calculated (S700).

Although the above-described embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications can be made without departing from the technical spirit of the present invention.

In the railroad wheel diameter calculation method of the present invention, the wheel curvature of the wheel using the wheel curvature shape measurement data measured by the measurement sensor of the shape measurement unit of the railroad wheel surface shape measurement system configured to measure the shape and diameter of the wheel surface. In addition to calculating and calculating the actual diameter of the wheel using the calculated curvature, there is an excellent effect that can improve the efficiency of the analysis and management of the curvature and diameter of the railway wheel compared to the conventional.

In addition, by applying the wheel diameter calculation method of the present invention to portable tread shape measurement equipment or wheel inspection equipment, there is also an effect that can easily utilize the measurement and analysis functions for the curvature, diameter and roundness of the railway wheel in the field.

Claims (5)

Measuring a curvature shape of the wheel using a measurement sensor of a shape measuring unit of the wheel tread shape measurement system; Smoothing the curvature shape data of the wheel measured through an analysis function of a data processing apparatus of the tread shape measurement system; Selecting two arbitrary points A and B from the smoothed data to obtain a straight line distance a between the two points; Obtaining a smoothed point perpendicular to the center point C of the two points A and B; Obtaining a distance (v) between a center point (C) of the two points (A, B) and a smoothed point perpendicular to the center point; Comprising the (a) and (v) to obtain a radius (R) of the wheel; consisting of, Radius R of the wheel is

v: Distance from the center point of line AB to the point where it meets string AB when the line segment vertically passing through the center point of line AB is in contact with string AB. a: straight line distance of line AB (mm) Railway wheel diameter calculation method, characterized in that calculated by the formula. delete The method of claim 1, further comprising obtaining a diameter (D) of the wheel using the radius (R) of the wheel. delete 4. The diameter (D) of claim 3 wherein A railway wheel diameter calculation method characterized by the formula D = R * 2.

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