CN113212491A - Station setting measurement method for evaluating smoothness of track line - Google Patents
Station setting measurement method for evaluating smoothness of track line Download PDFInfo
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Abstract
The invention relates to the technical field of railway surveying and mapping, in particular to a station setting measurement method for evaluating the smoothness of a track line, which is used for evaluating the smoothness of the track line by measuring the slant range and the zenith distance between a set station and a control point and the deflection angle between a track and the ground, calculating the transverse deviation and the height deviation of the set station relative to the control point according to the measured data and then calculating the coordinates of the set station by combining with the known point data in a railway design file. The invention discloses two modes of calculating the coordinates of the set stations, namely performing one-time set station measurement and two-time set station measurement by using one control point and calculating the coordinates of the set stations.
Description
Technical Field
The invention relates to the field of railway surveying and mapping, in particular to a station setting measurement method for evaluating the smoothness of a track line.
Background
The smoothness of the track line is an important embodiment of the comprehensive performance and the bearing capacity of the track structure, and the state diagnosis, control and capacity maintenance of the track line are core problems of a high-speed railway, and have the advantages of wide related range, high requirement and high difficulty. The rail irregularity is the root cause for exciting the vibration of the high-speed railway wheel rail system and the hunting instability of the train, and is also the inducement for deteriorating the stability of the line structure and reducing the service performance of the line structure, and the train derailment can be caused in serious conditions.
The track line is a center line between two steel rails, namely the center line in fig. 1; when the top surfaces of the left and right steel rails are consistent in height, the track circuit is positioned on the plane where the top surfaces of the steel rails are positioned; when the top surface height of two rail about is inconsistent, in vertical direction, the track circuit is located between the top surface of two rail, and the distance apart from two root rail top surfaces equals, still is located the intermediate position between two rail on the horizontal direction. The railway track is constructed according to the railway line in the railway design file, and the track line is consistent with the railway line in the railway design file.
The general knowledge in the field is that a total station is adopted to carry out station setting measurement and calculate coordinates of a station on a railway track, the absolute position of a track line is calculated according to the coordinates of the station, and then the smoothness of the track line is evaluated by using the absolute position of the track line, wherein the coordinates of the station are coordinates in a measurement coordinate system, and the three directions of the coordinates in the measurement coordinate system are north coordinates, east coordinates and elevation coordinates respectively. At present, two measuring methods for freely setting stations for leveling are available, wherein one measuring method is used for setting stations in a single disk position, the other measuring method is used for setting stations in a full disk position, and the two measuring methods need at least two known points for freely setting stations. The common non-leveling (height inconsistency of the left and right steel rails) free station setting technology comprises two methods, one is a method for performing intersection calculation based on distance, and the other is a method for performing coordinate transformation calculation, and at least three known points are required for setting. The known points are control points in a CPII control network or a CPIII control network of a track line, the distance between the control points and a railway track is not more than 5m, the distance between the CPII control points in the CPII control network is 800m, and the distance between the CPIII control points in the CPIII control network is 60 m; the CPII control network or the CPIII control network of the track line is recorded in a railway design file, and the railway design file also comprises data such as mileage, azimuth angle and coordinates of each control point on the track line.
The coordinates of the control points are coordinates in the measuring coordinate system, the position of the total station for measurement is the set point, the total station can measure the slant distance and the zenith distance between the set point and the control points, and the coordinates of the set point in the measuring coordinate system are calculated according to the measured values.
For some existing low-speed railway lines (generally, the speed of the passing vehicle is less than or equal to 160Km/h), the absolute position requirement of the railway line is low (namely, the overlap ratio of the track line and the railway line is low), if the station setting measurement is carried out by two or three known points by adopting the method, the slant distance and the zenith distance between each set station and two or three control points are measured, although the set station coordinates with higher position precision can be calculated, the absolute position precision of the track line obtained by using the set station coordinates is high, so that the smoothness of the track line finally obtained according to the absolute position evaluation of the track line is closer to the real smoothness of the track line, however, the precision of the obtained track smoothness result is far higher than the actually required precision, more time is consumed in the process for measuring the coordinates of the set station, and the measuring efficiency is low.
The current devices for measuring the station setup on the track line include the dynamic detector for the geometric status of the inertial navigation track disclosed in the prior art (e.g. chinese patent publication No. CN209553210U), which needs to be installed on the track and pushed along the track. The device is provided with a total station, an inclination sensor, a displacement sensor and a milemeter; the total station can be used for measuring the slant distance and the zenith distance between the station and the control point, the tilt sensor can be used for measuring the deflection angle of the total station when the station is freely established in a non-leveling mode, and the displacement sensor and the odometer can be used for measuring the displacement and the mileage of the device.
Disclosure of Invention
The invention aims to: the low-speed railway line has low requirement on the absolute position of the railway line, and if the existing station setting measurement method is used for the low-speed railway line to carry out station setting measurement, the problems of time waste and low efficiency exist in the measurement process.
In order to achieve the above purpose, the invention provides the following technical scheme:
a station setting measuring method for evaluating the smoothness of a track line adopts a total station to set a station, wherein the position of the total station at the station setting position is a station setting position; only one control point is selected at each station for measuring the slant distance and the zenith distance between the station and the control point, and the method comprises the following steps: s1:measuring a vertical plate index difference I of the total station; s2: selecting a control point C from the railway control network, and recording the coordinate of the control point C in the measurement coordinate system as (X)C，YC，HC) The projection of the control point C on the track line is a point C'; s3: at least utilizing the selected control point C to carry out one-time station setting measurement, wherein the distance between the projection of the station setting point on the railway line and the point C' in each measurement is not more than 100mm, and the slant distance and the zenith distance between the station setting point and the control point C are measured; s4: calculating the mileage of the control point C, calculating the azimuth angle F at the point CC′(ii) a S5: calculating the elevation deviation and the transverse deviation of the station relative to the control point C; s6: and calculating the coordinates of the station for calculating the absolute position of the track line.
Only one control point is needed to be used for calculating the coordinates of each set station, and the slant distance and the zenith distance between the set station and the control point are measured, so that compared with the prior art in which the slant distance and the zenith distance between the set station and at least two control points are needed to be measured, the operation time is reduced, the measurement efficiency is improved, and only one person is needed to operate the prism at the control point during each operation, so that the labor cost is saved; the influence of the error of the measuring instrument on the measuring result can be reduced by measuring the index difference of the vertical disc of the total station; the distance between the projection point of the station on the track line and the point C' is not more than 100mm, the station can be close to the control point C as far as possible, the coordinate precision of the station obtained by calculating measured data is guaranteed, the precision of the absolute position of the track line obtained by calculating the coordinates of the station is guaranteed, and the smoothness of the track line obtained according to the absolute position of the track line is closer to the actual smoothness of the track line.
As a preferable aspect of the present invention, the slip angle between the track at the set point and the ground is measured in step S3.
If a drift angle exists between the track at the station and the ground, the zenith distance measured by the total station is not the real zenith distance, and the zenith distance needs to be calculated according to the drift angle and the measurement value of the total station.
In a preferred embodiment of the present invention, the station setting measurement is performed only once in step S3, and the station setting measurement is performed with respect to the station setting measurementThe control points C are inclined distances and zenith distances, the set station is marked as a set station A, the projection of the set station A on the track line is marked as a point A ', and the point A ' is superposed with the point C '; and respectively recording the slant distance and the zenith distance between the station A and the control point C as SAAnd TAAnd the deflection angle between the track at the station A and the ground is recorded as betaA(ii) a And respectively recording the elevation deviation and the transverse deviation between the station A and the control point C as hAAnd DyAWherein h isA＝SA×cos(180°-TA-I+βA)，DyA＝SA×sin(180°-TA-I+βA)。
The point a 'coincides with the point C', and the data of the existing control point C can be used when calculating the coordinate at the set point a, so that the calculated result is more accurate.
In a preferred embodiment of the present invention, in the step S6, the coordinates of the station a are represented as (X)A，YA，HA) Wherein: xA＝XC-DyA×cos(FC′+α)，YA＝YC-DyA×sin(FC′+α)，HA＝HC+hA(ii) a Wherein alpha is SAThe angle between the projection on the ground and the tangent of the track line at point a'.
As a preferred embodiment of the present invention, the value of α is 90 °.
The point C ' is the projection of the point C on the track line, namely the tangent of the track line at the point C ' is vertical to the point CC '; let the projection of station A on the track line coincide with point C', i.e. SAThe projection on the ground is collinear with CC ', so that the tangent of the track line at the projected point at station A (i.e. point C') is SAThe angle formed by the projection on the ground is 90 °, i.e. alpha is 90 °.
As a preferable embodiment of the present invention, in step S3, two station setting measurements are performed, and the slant distance and the zenith distance between two station setting points and the control point C are measured, the two station setting points are respectively recorded as a station setting point M and a station setting point N, and the projections of the station setting point M and the station setting point N on the track line are respectively recorded as a station setting point M and a station setting point N on the track linePoint M 'and point N'; the point M ' and the point N ' are respectively positioned at two sides of the point C '; the distance between the point M 'and the point N' is not more than 100 mm; the pitches measured in the step S3 are respectively marked as SMAnd SNAnd respectively recording the measured zenith distances as TMAnd TNAnd the measured deflection angles are respectively recorded as betaMAnd betaN。
And the station setting measurement is carried out on two sides of the point C', and the coordinates of the station setting on two sides are calculated, so that the number of the station setting coordinates for subsequently calculating the absolute position of the track line is increased, the absolute position of the track line is reflected more truly, and the smoothness of the track line can be evaluated more accurately.
In a preferred embodiment of the present invention, in step S5, the elevation deviations of the plant site M and the plant site N are respectively recorded as hMAnd hNAnd the lateral deviation is respectively recorded as DyMAnd DyNWherein:
hM＝SM×cos(180°-TM-I+βM)，DyM＝SM×sin(180°-TM-I+βM)；
hN＝SN×cos(180°-TN-I+βN)，DyN＝SN×sin(180°-TN-I+βN)。
in a preferred embodiment of the present invention, in the step S6, the coordinates of the station M are represented as (X)M，YM，HM) The coordinate of the station N is recorded as (X)N，YN，HN) (ii) a The step of calculating the coordinates of the station M and the station N includes S61: calculating cos (angle MNC) according to the cosine theorem, and calculating the lengths of MC 'and NC';
s62: calculating the mileage L of point CC′；
S63: calculating the mileage L of the point MMMileage L from point NN；
S64: track line coordinates (L) according to point MM，DyM，hM) Calculating the coordinates of point M according to the track line coordinates (L) of point NN，DyN，hN) The coordinates of point N are calculated.
In the process of calculating the coordinates of the two set stations, the mileage of the projection point of the control point C on the track line is utilized, the mileage can be accurately calculated by a railway design file, the calculated coordinates of the two set stations are more accurate, the absolute position accuracy of the track line finally calculated is higher, and the smoothness of the track line can be more accurately evaluated according to the absolute position of the track line.
As a preferred embodiment of the present invention, the control point C may be a CPII control point or a CPIII control point.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. the invention provides a station setting measuring method for evaluating the smoothness of a track line, and when calculating the coordinates of a station setting, the method provided by the invention only needs to measure the slant distance between the station setting and a control point, the zenith distance and the deflection angle of a steel rail at the station setting each time, then combines the data in a railway design file to obtain the coordinates of the station setting, calculates the absolute position of the track line through the coordinates of the station setting, and evaluates the smoothness of the track line by using the absolute position of the track line; compared with the station setting measurement method in the prior art, which needs two control points in calculating the coordinates of each station setting, the technical scheme provided by the invention improves the measurement efficiency and reduces the operators required for measurement.
2. For the CPIII control network with densely distributed control points, only one set station coordinate is obtained by measuring and calculating at the control points, and the smoothness of the track line is evaluated according to the absolute position of the track line obtained by calculating the set station coordinate, so that the working efficiency of measuring personnel is improved; for the CPII control network with sparsely distributed control points, the data measured at the control points and introduced into the railway design file are used as the coordinates of two set stations under known conditions, and then the coordinates of the set stations are used for calculating the absolute position of the track line and evaluating the smoothness of the track line, so that the smoothness of the obtained track line is closer to the actual smoothness of the track line.
Drawings
FIG. 1 is a schematic diagram of a control network in a railway line according to the present invention;
fig. 2 is one of schematic diagrams of measured data of a total station in embodiment 1 of the present invention;
fig. 3 is a second schematic diagram of measured data of the total station according to embodiment 1 of the present invention;
fig. 4 is a schematic diagram of calculating coordinates of a station in embodiment 1 of the present invention;
fig. 5 is one of schematic diagrams of measured data of a total station in embodiment 2 of the present invention;
fig. 6 is a second schematic diagram of data measured by the total station according to embodiment 2 of the present invention;
fig. 7 is a positional relationship diagram of a set point and a control point in embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A station setting and measuring method for evaluating the smoothness of a track line adopts a dynamic detector for the geometric state of an inertial navigation track provided in the prior art (such as Chinese patent publication No. CN209553210U) to detect a station setting point arranged on a track of a low-speed track line by combining a single CPIII control point, wherein the dynamic detector for the geometric state of the inertial navigation track comprises a total station, an inclination sensor, a displacement sensor and a mileometer. The specific measurement process is as follows:
measuring the vertical disc index difference I of the total station, then selecting a control point C from the CPIII control network of the railway, wherein the coordinate of the control point C in the measuring coordinate system is the existing known data and is recorded as (X)C，YC，HC) (ii) a As shown in fig. 1, the projection point of the control point C on the track line is the closest point C' to the control point C on the track line. By design of railwaysMileage L at file calculation point CC′The method for calculating the mileage at a certain point on the track line is well known in the art, and can be referred to as "a method for calculating the mileage on the track line at a track point" (journal of surveying and mapping science and technology, 2013, vol. 30, vol. 5); then according to LC′Calculating the azimuth F at point CC′The method of calculating the azimuth angle at a point on the track line based on the mileage of the point is also well known in the art, and can be referred to in the "calculation of tangent azimuth angle at any mileage on the high speed railway design line" (mapping project, 2015, volume 24, phase 8).
And pushing the inertial navigation track geometric state dynamic detector along the track line to enable the total station to move along the track line, wherein when the projection of the total station on the track line is superposed with the point C ', the position of the total station is recorded as a station A, and the projection of the station A on the track line is recorded as the point A'. Although the operation is carried out by observing and positioning only through a measuring person by naked eyes, the distance between the control point C and the railway track is not more than 5m, so that the station A 'and the point C' can be overlapped, and the generated error can be ignored.
Measuring the slope distance S between the station A and the control point C through a total stationADistance T from zenithAAs shown in fig. 2, L and R respectively represent the left and right rails forming the track, and if the heights of the top surfaces of the left and right rails are different, the inclination sensor is required to measure the drift angle β of the inertial navigation track due to the difference in the heights of the top surfaces of the left and right rails at the position of the dynamic detector for measuring the geometric state of the inertial navigation trackA，βAI.e. the deflection angle of the track at the set-up station a, as shown in fig. 3; then calculating the elevation deviation h between the site A and the control point CADeviation from transverse DyAH is easily derived from FIG. 3A＝SA×cos(180°-TA-I+βA)，DyA＝SA×sin(180°-TA-I+βA)。
The coordinates (X) of the station A are calculated from the above measured dataA，YA，hA) The concrete formula is as follows:
XA＝XC-DyA×cos(FC′+α)，
YA＝YC-DyA×sin(FC′+α)，
HA＝HC+hA；
for simplifying the description, the plane where the point C' is parallel to the ground is taken as a line plane; as shown in FIG. 4, where α is A "C" (S)AProjection on the route plane) forms an angle with the tangent of the track line at point a ' (coinciding with point C '), α being 90 ° since the projection of station a on the track line is assumed to coincide with point C '.
After finishing the station setting measurement at the control point C, according to the above method, selecting other control points on the track line for the station setting measurement, repeating the above operations, measuring coordinates of a plurality of station setting points for calculating absolute positions of the track line, and finally evaluating the smoothness of the track line by using the calculated absolute positions of the track line, wherein the specific method can be combined with a track smoothness detection and analysis method (chinese patent publication No. CN 109823362A).
The method can also adopt CPII control points, because the distribution interval of the CPII control points is larger than that of the CPII control points, the number of the set stations which can be measured on the track line with the same mileage is small, the data used for calculating the absolute position of the track line in the later period is small, the smoothness precision of the track line obtained according to the absolute position of the track line is reduced, and the obtained smoothness result of the track line can still be used for smoothness evaluation of the low-speed line.
Example 2
In this embodiment, the same measurement apparatus as that in embodiment 1 is adopted, that is, the dynamic detector for geometric state of inertial navigation track provided in the prior art (for example, chinese patent publication No. CN209553210U) is adopted, and a control point C is selected in the CPII control network, and the coordinate of the control point C in the measurement coordinate system is known data and is denoted as (X)C，YC，HC) Using the same as the embodiment1 obtaining the projection point C' of the control point C on the track line by the same method, and calculating the mileage L at the point CC′And azimuth angle FC′。
Sequentially using a total station instrument to carry out station setting measurement on two sides of a point C' on the track line, and recording station setting points for carrying out the station setting measurement twice as a station setting point M and a station setting point N respectively; setting projections of a station M and a station N on a track line as M 'and N', respectively, wherein the distance between the points M 'and N' is not more than 100 mm; the distance between points M 'and C' and the distance between points N 'and C' do not exceed 100 mm.
Measuring the slope distance S between the set point M and the control point C through a total stationMDistance T from zenithMMeasuring the slope distance S between the set point N and the control point CNDistance T from zenithN(ii) a The drift angles of the dynamic detector of the geometric state of the inertial navigation track measured by the inclination sensor at the set station M and the set station N are respectively betaMAnd betaN(ii) a Measuring the mileage M 'N' between the set station M and the set station N through a mileage sensor; then, the elevation deviation h between the set point M and the control point C is calculated by the same method as in example 1MDeviation from transverse DyM(ii) a The elevation deviation h between the set point N and the control point C was calculated in the same manner as in example 1NDeviation from transverse DyN. To obtain hM＝SM×cos(180°-TM-I+βM)，DyM＝SM×sin(180°-TM-I+βM)，hN＝SN×cos(180°-TN-I+βN)，DyN＝SN×sin(180°-TN-I+βN)。
The interval between two points which are only spaced by less than 100mm on the track line can be approximately considered to be straight, that is, the line segment M ' N ' can be considered to be a straight line segment, and in order to simplify the description, the plane where the point C ' is located and parallel to the ground is taken as a line plane in conjunction with fig. 5 to 7; wherein, the point C "is the projection of the control point C on the circuit plane, and since the distance between the point M ', the point N ' and the point C ' is not more than 100mm, it can be approximately considered that the point M ' and the point N ' are both on the circuit plane, then C" M ═ DyM、C″N′＝DyN(ii) a According to the cosine theorem, it can be known that:
cos(∠M′)＝(M′N′2+C″M′2-C″N′2)/(2×M′N′×C″M′)；
thus, there are: m ' C ═ C "M ' × cos (, M '); n ' C ═ M ' N ' -M ' C ';
thus, the mileage L of the point MM′＝LC′+ M 'C', mileage L of point NN′＝LC′-N 'C'. It is common knowledge in the art that the mileage of a set point is equal to the mileage of a projected point of the set point on a track line, i.e., LM＝LM′，LN＝LN′(ii) a Thus, the track line coordinate M (L) of the preset station M and the preset station N is obtainedM，DyM，hM)，N(LN，DyN，hN) Combining a conversion method about track line coordinates and measurement coordinates in the book of railway engineering survey (railway publishing agency, 2008), converting the track line coordinates of the set station M and the set station N into coordinates of the set station M and the set station N in a measurement coordinate system according to a railway design file; and finally, selecting other control points from the CPII control network along the track line, repeating the operation to measure the coordinates of the plurality of set stations, calculating the absolute position of the track line according to the obtained coordinates of the plurality of set stations, and evaluating the smoothness of the track line by using the absolute position of the track line.
Of course, after the elevation deviation and the lateral deviation of the set point M and the set point N are obtained in this embodiment, the actual coordinates of the set point M and the set point N may also be calculated according to the method in embodiment 1, but because the control point used in this embodiment is the CPII control network with a large control point interval, the existing accurate data L is introducedC′The method can improve the coordinate precision of the station M and the station N, and measure the coordinates of two stations on the track line at each control point, thereby increasing the data volume for calculating the absolute position of the track line and enabling the final smoothness of the track line to be closer to the actual smoothness of the track line.
Of course, if the coordinates of a greater number of stations are measured and calculated, that is, the station setting measurement is performed between the station setting M and the station setting N, so that the number of the station setting coordinates for calculating the absolute position of the track line is further increased, the obtained track smoothness result is more accurate.
If the control points in the CPIII control network are used in this embodiment, or the station setting measurement method in this embodiment is also used in embodiment 1, because the distance between the control points in the CPIII control network is small, the number of the finally measured coordinates of the station setting point is large, and the absolute position error of the track line obtained by calculation is smaller, the smoothness of the track line obtained according to the absolute position of the track line is closer to the actual smoothness of the track line.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A station setting measuring method for evaluating the smoothness of a track line adopts a total station to set a station, wherein the position of the total station at the station setting position is a station setting position; the method is characterized in that only one control point is selected at each station for measuring the slant distance and the zenith distance between the station and the control point, and the method comprises the following steps:
s1: measuring a vertical plate index difference I of the total station;
s2: selecting a control point C from the railway control network, and recording the coordinate of the control point C in the measurement coordinate system as (X)C，YC，HC) The projection of the control point C on the track line is a point C';
s3: at least utilizing the selected control point C to carry out one-time station setting measurement, wherein the distance between the projection of the station setting point on the railway line and the point C' in each measurement is not more than 100mm, and the slant distance and the zenith distance between the station setting point and the control point C are measured;
s4: calculating the mileage of the control point C, calculating the azimuth angle F at the point CC′；
S5: calculating the elevation deviation and the transverse deviation of the station relative to the control point C;
s6: and calculating the coordinates of the station for calculating the absolute position of the track line.
2. The method as claimed in claim 1, wherein the deviation angle between the track and the ground at the set point is measured in step S3.
3. The method as claimed in claim 2, wherein in step S3, a station setting measurement is performed only once to measure a slant distance and a zenith distance between a station setting point and the control point C, the station setting point is denoted as a station setting point a, a projection of the station setting point a on the track is denoted as a point a ', and the point a ' coincides with the point C ';
and respectively recording the slant distance and the zenith distance between the station A and the control point C as SAAnd TAAnd the deflection angle between the track at the station A and the ground is recorded as betaA(ii) a And respectively recording the elevation deviation and the transverse deviation between the station A and the control point C as hAAnd DyAWherein h isA＝SA×cos(180°-TA-I+βA)，DyA＝SA×sin(180°-TA-I+βA)。
4. The method as claimed in claim 3, wherein in step S6, the coordinates of the station A are marked as (X)A，YA，HA) Wherein:
XA＝XC-DyA×cos(FC′+α)，
YA＝YC-DyA×sin(FC′+α)，
HA＝HC+hA；
wherein alpha is SATangent line at point A' between projection on ground and track lineThe included angle of the direction.
5. The station-setting measurement method for evaluating the smoothness of the railway line as claimed in claim 4, wherein the value of α is 90 °.
6. The method according to claim 2, wherein in step S3, two station-setting measurements are performed to measure an oblique distance and a zenith distance between two station-setting points and the control point C, the two station-setting points are respectively marked as a station-setting point M and a station-setting point N, and projections of the station-setting point M and the station-setting point N on the track line are respectively marked as a point M 'and a point N'; the point M ' and the point N ' are respectively positioned at two sides of the point C '; the distance between the point M 'and the point N' is not more than 100 mm; the pitches measured in the step S3 are respectively marked as SMAnd SNAnd respectively recording the measured zenith distances as TMAnd TNAnd the measured deflection angles are respectively recorded as betaMAnd betaN。
7. The method as claimed in claim 6, wherein in step S5, the elevation deviations of the set point M and the set point N are respectively recorded as hMAnd hNAnd the lateral deviation is respectively recorded as DyMAnd DyNWherein:
hM＝SM×cos(180°-TM-I+βM)，DyM＝SM×sin(180°-TM-I+βM)；
hN＝SN×cos(180°-TN-I+βN)，DyN＝SN×sin(180°-TN-I+βN)。
8. the method as claimed in claim 7, wherein in step S6, the coordinates of the station M are marked as (X)M，YM，HM) The coordinate of the station N is recorded as (X)N，YN，HN) (ii) a The step of calculating the coordinates of the station M and the station N includes S61: calculating the lengths of M 'C' and N 'C';
s62: calculating the mileage L of point CC′；
S63: calculating the mileage L of the point MMMileage L from point NN；
S64: track line coordinates (L) according to point MM，DyM，hM) Calculating the coordinates of point M according to the track line coordinates (L) of point NN，DyN，hN) The coordinates of point N are calculated.
9. A station-setting measurement method for track line smoothness evaluation according to any one of claims 1-8, wherein said control point C can be a CPII control point or a CPIII control point.
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