Measuring method of heliostat column accuracy

Abstract

A method for measuring the accuracy of a heliostat column comprises: obtaining an auxiliary measurement chord on a column end plate of the heliostat, wherein the distance between the auxiliary measurement chord and the axis of the column end plate is an eccentric height; obtaining coordinates of a second measurement point and a third measurement point at two end points of the auxiliary measurement chord; obtaining coordinates of a first measurement point outside the auxiliary measurement chord, wherein the distance from the first measurement point to the second measurement point is equal to the distance from the first measurement point to the third measurement point; obtaining a first diameter of the distance from the first measurement point to the auxiliary measurement chord; and calculating one or more column accuracy parameters according to the coordinates of the first measurement point, the coordinates of the second measurement point, the coordinates of the third measurement point, the eccentric height, and the first diameter, wherein the column accuracy parameters include: the coordinates of the center point of the column, the angle between the axis of the column end plate and the due north direction, the horizontality of the column end plate, and the verticality of the column.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pile foundations of a solar thermal power station, and in particular to a method for measuring the accuracy of a heliostat column. Background Art

[0002] The molten salt tower solar thermal power generation system uses multiple reflectors to gather sunlight, and reflects the sunlight through heliostats to the absorber on the top of the collector tower, heating the heat transfer fluid flowing in the absorber. The high-temperature heat transfer fluid generates high-temperature and high-pressure steam through the steam generation system to drive the steam turbine generator set to generate electricity.

[0003] Heliostats focus solar energy to heat the absorber, which requires high precision and is difficult to adjust. In addition, there are a large number of pile foundations in the mirror field. Currently, there is a lack of suitable means to efficiently adjust the columns. Summary of the invention

[0004] The present invention provides a method for measuring the precision of a heliostat column, which can achieve high-efficiency adjustment of the column, meet high-precision requirements, and improve on-site construction efficiency.

[0005] According to one aspect of the present disclosure, a method for measuring the accuracy of a heliostat column is provided, comprising:

[0006] Obtain an auxiliary measurement chord on the column end plate of the heliostat, where the distance between the auxiliary measurement chord and the axis of the column end plate is the eccentric height T;

[0007] Obtain the coordinates of the second measurement point P2 and the third measurement point P3, which are the two end points of the auxiliary measurement chord;

[0008] Obtain the coordinates of the first measuring point P1 outside the auxiliary measuring chord, wherein the distance from the first measuring point P1 to the second measuring point P2 is equal to the distance from the first measuring point P1 to the third measuring point P3;

[0009] Obtain a first diameter D of the distance from the first measuring point P1 to the auxiliary measuring chord;

[0010] According to the coordinates X1, Y1, H1 of the first measuring point P1; the coordinates X2, Y2, H2 of the second measuring point P2; the coordinates X3, Y3, H3 of the third measuring point P3, the eccentric height T, and the first diameter D, one or more of the column accuracy parameters are calculated, and the column accuracy parameters include: the coordinates of the column center point N, the angle α between the axis of the column end plate and the north direction, the horizontality of the column end plate, and the verticality of the column.

[0011] In an exemplary embodiment of the present disclosure, calculating the coordinates of the center point N of the column includes:

[0012] X=T×((X2+X3) / 2-X1) / D+(X2+X3) / 2;

[0013] Y=T×((Y2+Y3) / 2-Y1) / D+(Y2+Y3) / 2;

[0014] H=T×((H2+H3) / 2-H1) / D+(H2+H3) / 2;

[0015] Among them, X, Y, and H are the coordinates of the center point N of the column.

[0016] In an exemplary embodiment of the present disclosure, the angle α between the axis of the column end plate and the due north direction is calculated, including: α=MOD(DEGREES(ATAN2((X2-X3), (Y2-Y3))), 360).

[0017] In an exemplary embodiment of the present disclosure, calculating the horizontality of the column end plate includes: column end plate horizontality=DEGREES(ACOS(D / SQRT((H1-(H2+H3) / 2)²+D²))).

[0018] In an exemplary embodiment of the present disclosure, the verticality of the column is calculated, including: column verticality = DEGREES(ASIN(SQRT((X0-X)²+(Y0-Y)²) / 2 / SQRT(L²+R²))); wherein L is the length of the column, R is the radius of the column, and X0 and Y0 are the coordinates of the design center point N0.

[0019] In an exemplary embodiment of the present disclosure, after calculating the coordinates of the column center point N, the method for measuring the accuracy of the heliostat column further includes: calculating the column clear height, wherein the column clear height=H-Hg, and Hg is the elevation of the column ground point.

[0020] In an exemplary embodiment of the present disclosure, after calculating the coordinates of the column center point N, the method for measuring the accuracy of the heliostat column further includes: calculating the position difference between the column center point N and the designed center point N0, wherein the position difference between the column center point N and the designed center point N0=SQRT((X0-X)²+(Y0-Y)²), X0 and Y0 are the coordinates of the designed center point N0.

[0021] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0022] Calculate the coordinates of the column center point N and compare it with the designed center point N0;

[0023] When the coordinates of the center point N of the column meet the design accuracy, the horizontality of the column end plate and the verticality of the column are calculated;

[0024] Compare the horizontality of the column end plates and the verticality of the columns with the design accuracy;

[0025] When the horizontality of the column end plate and the verticality of the column meet the design accuracy, calculate the angle α between the axis of the column end plate and the true north direction;

[0026] Compare the angle α between the axis of the column end plate and the true north direction with the design accuracy.

[0027] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0028] When the angle α between the axis of the column end plate and the true north direction meets the design accuracy, calculate the coordinates of the column center point N again and compare it with the design center point N0;

[0029] Calculate the horizontality of the column end plate and the verticality of the column again and compare them with the design accuracy.

[0030] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0031] Obtain an auxiliary tooling, the auxiliary tooling comprising a first bracket 11 and a second bracket 12, the first bracket 11 is provided with a second spherical prism 22 and a third spherical prism 23 at two ends thereof, one end of the second bracket is connected to the center of the first bracket 11, the other end of the second bracket is provided with a first spherical prism 21, and the first bracket 11 is provided with a first positioning pin 31 and a second positioning pin 32;

[0032] The auxiliary tooling is installed on the column end plate of the heliostat through the first positioning pin 31 and the second positioning pin 32, the first positioning pin 31 matches the first positioning hole 41 of the column end plate, and the second positioning pin 32 matches the second positioning hole 42 of the column end plate;

[0033] The first bracket 11 is used as an auxiliary measurement chord; the coordinates of the second spherical prism 22 are used as the coordinates of the second measurement point P2; the coordinates of the third spherical prism 23 are used as the coordinates of the third measurement point P3; and the coordinates of the first spherical prism 21 are used as the coordinates of the first measurement point P1.

[0034] The method for measuring the accuracy of the heliostat column disclosed in the present invention can calculate the column accuracy parameters according to the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3, the first diameter D, and the eccentric height T. Since the column height is relatively high, it is difficult to perform high-precision measurements according to conventional measurement methods. The present invention can indirectly calculate the accuracy of the heliostat column by obtaining the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3. It is suitable for engineering practice and has high accuracy. In addition, the method for measuring the accuracy of the heliostat column disclosed in the present invention, when the column is adjusted multiple times and the accuracy of the column is calibrated and calculated multiple times, since the first diameter D and the eccentric height T are fixed values, it is only necessary to re-measure the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3 to obtain the required column accuracy. It has strong field operability and is conducive to improving construction efficiency.

[0035] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0037] Figure 1 The present invention is a flow chart of an exemplary embodiment of a method for measuring the accuracy of a heliostat column.

[0038] Figure 2 It is a schematic diagram of calculating the coordinates of the center point N of the heliostat column in an exemplary embodiment of the method for measuring the accuracy of the heliostat column disclosed in the present invention.

[0039] Figure 3 It is a schematic diagram of calculating the horizontality of the end plate of a heliostat column in an exemplary embodiment of the method for measuring the accuracy of the heliostat column disclosed in the present invention.

[0040] Figure 4 It is a schematic diagram of calculating the verticality of a heliostat column in an exemplary embodiment of the method for measuring the accuracy of the heliostat column disclosed in the present invention.

[0041] Figure 5 FIG. 1 is a schematic diagram of a column end plate in an exemplary embodiment of a method for measuring the accuracy of a heliostat column disclosed in the present invention.

[0042] Figure 6 It is a schematic diagram of an auxiliary tooling in an exemplary embodiment of the method for measuring the accuracy of a heliostat column disclosed in the present invention. DETAILED DESCRIPTION

[0043] Example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present disclosure will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted. In addition, the drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale.

[0044] Unless otherwise specified or explained, the technical terms or scientific terms used in the present disclosure shall have the common meanings understood by people with ordinary skills in the field to which the present disclosure belongs. The terms "one", "an", "the", "said" and "at least one" are used to indicate the existence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusion and mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms "first" and "second" are used only as labels and are not used to limit the quantity, importance or order of their objects.

[0045] The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a movable connection, an integral connection, or a detachable connection. It can be a direct connection or an indirect connection through an intermediate medium.

[0046] The “Part A is arranged on Part B” mentioned in the present disclosure may mean that Part A is directly connected to Part B, or Part A may be arranged on Part C, and Part C may be arranged on Part B.

[0047] A “communication connection” can be a wired communication connection or a wireless communication connection, and can be direct communication or indirect signal connectivity through an intermediate medium.

[0048] In addition, in this application, directional terms such as "upper" and "lower" are only used to indicate relative positional relationships. For example, for convenience, they are defined according to the position and state during actual operation, or relative to the orientation of the components schematically placed in the drawings. It should be understood that these directional terms are relative concepts, which may change accordingly according to the change of the orientation of the components placed in the drawings.

[0049] Heliostats play the role of gathering solar energy to heat the absorber, and require very high precision. During on-site construction, the heliostat columns need to be adjusted multiple times to confirm whether they meet the design requirements. If not, multiple adjustments are required until the column pile position meets the design requirements. For construction operations with a large number of mirror fields, there is a lack of practical and efficient measurement methods for the accuracy of heliostat columns. In some related technologies, the control points of the heliostat columns are measured in the field, transmitted to the computer using Bluetooth of the total station, and then the field coordinate points are plotted using surveying and mapping software to obtain the accuracy of the heliostat columns. However, this method measures and calculates too much data, has a high error rate in drawing, and is inconvenient for field operations, resulting in slow construction and pile adjustment.

[0050] In view of the above problems, the present invention provides a method for measuring the accuracy of heliostat columns, which can achieve high-efficiency adjustment of the columns, meet high-precision requirements, and improve on-site construction efficiency. Figure 1 , including steps S100 to S500.

[0051] Step S100: obtaining an auxiliary measurement chord on the column end plate of the heliostat, where the distance between the auxiliary measurement chord and the axis of the column end plate is the eccentric height T;

[0052] Step S200: obtaining the coordinates of the second measurement point P2 and the third measurement point P3, two end points of the auxiliary measurement chord;

[0053] Step S300: obtaining the coordinates of the first measuring point P1 outside the auxiliary measuring chord, wherein the distance from the first measuring point P1 to the second measuring point P2 is equal to the distance from the first measuring point P1 to the third measuring point P3;

[0054] Step S400: obtaining a first diameter D of a distance from a first measuring point P1 to an auxiliary measuring chord;

[0055] Step S500: Calculate one or more of the column accuracy parameters according to the coordinates X1, Y1, H1 of the first measuring point P1; the coordinates X2, Y2, H2 of the second measuring point P2; the coordinates X3, Y3, H3 of the third measuring point P3, the eccentric height T, and the first diameter D. The column accuracy parameters include: the coordinates of the column center point N, the angle α between the axis of the column end plate and the north direction, the horizontality of the column end plate, and the verticality of the column.

[0056] Specifically, refer to Figure 1As shown, the column end plate of the heliostat can be circular, and the auxiliary measurement chord is a chord that does not pass through the center of the circle and has an eccentric height T from the center of the circle. The two end points of the auxiliary measurement chord are the two points that intersect with the circumference of the column end plate, which are the second measurement point P2 and the third measurement point P3. The vertical line from the first measurement point P1 to the auxiliary measurement chord intersects with the auxiliary measurement chord at the midpoint of the auxiliary measurement chord. The coordinates of the point described in the present disclosure refer to the three coordinates of the point, that is, the position coordinates (X, Y) and the elevation H in space. For example, during field measurement, after determining the plumb plane and the horizontal plane, the elevation H is the dimension of the plumb direction from the ground reference zero point, and X and Y are the dimensions in the two directions perpendicular to each other in the horizontal plane. For example, the north-south direction can be the X direction, and the east-west direction can be the Y direction. For example, the coordinates of the first measurement point P1 obtained by field measurement are X1, Y1, and H1, the coordinates of the second measurement point P2 are X2, Y2, and H2, and the coordinates of the third measurement point P3 are X3, Y3, and H3. Those skilled in the art will appreciate that other coordinate systems may also be set, which will not affect the implementation of the method for measuring the accuracy of the heliostat column provided in the present disclosure.

[0057] The method for measuring the accuracy of the heliostat column disclosed in the present invention can calculate the column accuracy parameters according to the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3, the first diameter D, and the eccentric height T. Since the column height is relatively high, it is difficult to perform high-precision measurements according to conventional measurement methods. The present invention can indirectly calculate the accuracy of the heliostat column by obtaining the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3. It is suitable for engineering practice and has high accuracy. In addition, the method for measuring the accuracy of the heliostat column disclosed in the present invention, when the column is adjusted multiple times and the accuracy of the column is calibrated and calculated multiple times, since the first diameter D and the eccentric height T are fixed values, it is only necessary to re-measure the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3 to obtain the required column accuracy. It has strong field operability and is conducive to improving construction efficiency.

[0058] Below, the calculation method of each column accuracy parameter is explained in detail:

[0059] In an exemplary embodiment of the present disclosure, the coordinates of the center point N of the column are calculated, including: X=T×((X2+X3) / 2-X1) / D+(X2+X3) / 2; Y=T×((Y2+Y3) / 2-Y1) / D+(Y2+Y3) / 2; H=T×((H2+H3) / 2-H1) / D+(H2+H3) / 2; wherein X, Y, and H are the coordinates of the center point N of the column. Figure 2 As shown, the midpoint of the line connecting the second measuring point P2 and the third measuring point P3 can be used as the coordinate origin, the north-south direction as the X direction, and the east-west direction as the Y direction for calculation. Figure 2There are two similar triangles in the figure. One of them has D as the hypotenuse, D1 as a right angle, and a as a base angle; the other has T as the hypotenuse, D2 as a right angle, and b as a base angle. For the center point N of the column, refer to Figure 2 As shown, its geometric relationship includes: D1=(X2+X3) / 2-X1; cosa=D1 / D; cosa=cosb; D2=T×D1 / D. The center of the column in the X direction = D2+(X2+X3) / 2, so the X-direction coordinate of the center point N of the column is X=T×((X2+X3) / 2-X1) / D+(X2+X3) / 2. The calculation method of the center of the column in the Y direction and the H direction is the same as that in the X direction, so Y=T×((Y2+Y3) / 2-Y1) / D+(Y2+Y3) / 2; H=T×((H2+H3) / 2-H1) / D+(H2+H3) / 2.

[0060] Exemplarily, the eccentric height T of the auxiliary measurement chord from the axis of the column end plate may be 28.4 mm, and the first diameter D of the distance from the first measurement point P1 to the auxiliary measurement chord may be 0.6 m. After each adjustment of the heliostat column, the coordinates of the first measurement point P1, the second measurement point P2, and the third measurement point P3 may be input through the following formulas to obtain the coordinates of the column center point N: X=0.0284×((X2+X3) / 2-X1) / 0.6+(X2+X3) / 2; Y=0.0284×((Y2+Y3) / 2-Y1) / 0.6+(Y2+Y3) / 2; H=0.0284×((H2+H3) / 2-H1) / 0.6+(H2+H3) / 2.

[0061] In an exemplary embodiment of the present disclosure, the angle α between the axis of the column end plate and the true north direction is calculated, including: α=MOD(DEGREES(ATAN2((X2-X3), (Y2-Y3))), 360). Wherein, MOD is a modulus operation, and DEGREES is an operation for converting radians into degrees.

[0062] In particular, although the column end plate can be circular and can theoretically have countless axes, for each column in the mirror field, the angle α between its axis and the north direction has a specific design value, that is, the column end plate axis described in the present disclosure is an axis with a specific meaning, and after the debugging of the heliostat column is completed, the axis needs to have a specific angle with the north direction.

[0063] In an exemplary embodiment of the present disclosure, calculating the horizontality of the column end plate includes: column end plate horizontality = DEGREES (ACOS (D / SQRT ((H1-(H2+H3) / 2)² + D²))). Figure 3As shown, angle β is the angle between the column end plate and the horizontal plane. For the column end plate, the geometric relationship includes: d=H1-(H2+H3) / 2; c=SQRT(d²+D²), that is, c=SQRT((H1-(H2+H3) / 2)²+D²); cosa=D / c. Then, the horizontality of the column end plate = DEGREES(ACOS(D / SQRT((H1-(H2+H3) / 2)²+D²))).

[0064] Exemplarily, the eccentric height T of the auxiliary measurement chord from the axis of the column end plate may be 28.4 mm, and the first diameter D of the distance from the first measurement point P1 to the auxiliary measurement chord may be 0.6 m. After each adjustment of the heliostat column, the horizontality of the column end plate may be obtained by inputting the elevations H1, H2, and H3 of the first measurement point P1, the second measurement point P2, and the third measurement point P3 through the following formula: Column end plate horizontality = DEGREES(ACOS(0.6 / SQRT((H1-(H2+H3) / 2)²+(0.6)²))).

[0065] In an exemplary embodiment of the present disclosure, the verticality of the column is calculated, including: column verticality = DEGREES (ASIN (SQRT ((X0-X)² + (Y0-Y)²) / 2 / SQRT (L² + R²))); wherein L is the length of the column, R is the radius of the column, and X0 and Y0 are the coordinates of the design center point N0. Reference Figure 4 As shown, for the column, its geometric relationship includes: p=SQRT((X0-X)²+(Y0-Y)²) / 2; q=SQRT(L²+R²); sinγ=p / q, then the column verticality=DEGREES(ASIN(SQRT((X0-X)²+(Y0-Y)²) / 2 / SQRT(L²+R²))). Among them, p is half of the distance between point N0 and point N, point N0 is the theoretical center of the column, that is, the design center point; N is the actual center of the column, q is the distance between point N0 and point S, and point S is the ground point of the column.

[0066] Exemplarily, the column length L may be 6 m, and the column radius R may be 0.25 m. After each adjustment of the heliostat column, the verticality of the column may be obtained by inputting the coordinates of the column center point N through the following formula: column verticality = DEGREES(ASIN(SQRT((X0-X)²+(Y0-Y)²) / 2 / SQRT(6²+0.25²))). Exemplarily, the coordinates of the column center point N may be obtained according to the method for calculating the coordinates of the column center point N provided in the aforementioned exemplary embodiment.

[0067] In an exemplary embodiment of the present disclosure, after calculating the coordinates of the column center point N, the method for measuring the accuracy of the heliostat column further includes: calculating the column clear height, wherein the column clear height=H-Hg, and Hg is the elevation of the column ground point.

[0068] In an exemplary embodiment of the present disclosure, after calculating the coordinates of the column center point N, the method for measuring the accuracy of the heliostat column further includes: calculating the position difference between the column center point N and the designed center point N0, wherein the position difference between the column center point N and the designed center point N0=SQRT((X0-X)²+(Y0-Y)²), X0 and Y0 are the coordinates of the designed center point N0.

[0069] In some exemplary embodiments, based on the coordinates X1, Y1, H1 of the first measuring point P1; the coordinates X2, Y2, H2 of the second measuring point P2; the coordinates X3, Y3, H3 of the third measuring point P3, the eccentric height T, and the first diameter D, the coordinates of the center point N of the column, the angle α between the axis of the column end plate and the north direction, the horizontality of the column end plate, the verticality of the column, the clear height of the column, and the position difference between the center point N of the column and the designed center point N0 are calculated.

[0070] For example, the heliostat column is a prefabricated concrete pile, which is relatively heavy, and the design requires high measurement accuracy, and multiple parameters are interconnected. It is possible that the center point of the column is adjusted appropriately, but the verticality of the column and the horizontality of the end plate exceed the limit. Often each column needs to be adjusted repeatedly to meet the design measurement accuracy requirements. Through the accuracy calculation method provided above, the field only needs to obtain the three coordinates of the first measurement point P1, the second measurement point P2, and the third measurement point P3 and the three coordinates of the ground point, and input them into the formula to quickly calculate whether the various parameters of each column meet the design measurement requirements, thereby greatly reducing the amount of field calculations, improving the construction pile adjustment speed, and ensuring accuracy.

[0071] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0072] Calculate the coordinates of the column center point N and compare it with the designed center point N0;

[0073] When the coordinates of the center point N of the column meet the design accuracy, the horizontality of the column end plate and the verticality of the column are calculated;

[0074] Compare the horizontality of the column end plates and the verticality of the columns with the design accuracy;

[0075] When the horizontality of the column end plate and the verticality of the column meet the design accuracy, calculate the angle α between the axis of the column end plate and the true north direction;

[0076] Compare the angle α between the axis of the column end plate and the true north direction with the design accuracy.

[0077] In this exemplary embodiment, the precision parameters of the heliostat column are calculated in a specific order and compared with the design accuracy. Specifically, first check whether the coordinates of the column center point N meet the design requirements and compare them with the design center point N0. For example, the distance between the column center point N and the design center point N0 must be within the range of ±15cm. When the coordinates of the column center point N do not meet the design accuracy, the column pile foundation point can be adjusted and then checked; when the coordinates of the column center point N meet the design accuracy, check the horizontality of the column end plate and the verticality of the column. In this exemplary embodiment, the column can be adjusted when it is ensured that the coordinates of the column center point N meet the design requirements, so that it meets the requirements of the horizontality of the column end plate and the verticality of the column. During the adjustment process, the movement of the column center point N can be avoided as much as possible to avoid the position of the column center point N exceeding the limit, which is conducive to improving the efficiency and accuracy of pile adjustment.

[0078] Furthermore, the horizontality of the column end plate and the verticality of the column are calculated and compared with the design accuracy. For example, the horizontality of the column end plate needs to be controlled within the range of ±1.5°, and the verticality of the column needs to be controlled within the range of ±1.5°. When any one of the horizontality of the column end plate and the verticality of the column does not meet the design accuracy, the column can be adjusted and then checked; when the horizontality of the column end plate and the verticality of the column both meet the design accuracy, the angle α between the axis of the column end plate and the north direction is checked. This exemplary embodiment can adjust the column when it is ensured that the horizontality of the column end plate and the verticality of the column meet the design requirements, so that it meets the accuracy requirements of the angle α between the axis of the column end plate and the north direction. During the adjustment process, only the angle of the axis of the column end plate can be adjusted as much as possible to avoid the movement of the center point N of the column causing the position of the center point N of the column to exceed the limit, or the column tilting causing the verticality of the column and the horizontality of the end plate to exceed the limit, which is conducive to improving the efficiency and accuracy of pile adjustment.

[0079] Furthermore, the angle α between the axis of the column end plate and the true north direction is calculated and compared with the design accuracy. For example, the intersection angle between the true north direction and the axis of the column end plate is controlled within the range of ±2°. When the angle α between the axis of the column end plate and the true north direction does not meet the design accuracy, the column can be further adjusted and then checked.

[0080] Exemplarily, the method for measuring the accuracy of the heliostat column also includes comparing the clear height of the column with the design accuracy. For example, the clear height of the column (height from the ground) needs to be controlled within the range of 3.65m to 3.75m.

[0081] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0082] When the angle α between the axis of the column end plate and the true north direction meets the design accuracy, calculate the coordinates of the column center point N again and compare it with the design center point N0;

[0083] Calculate the horizontality of the column end plate and the verticality of the column again and compare them with the design accuracy.

[0084] For example, after calculating the precision parameters of the heliostat column in a specific order and adjusting the angle α between the column end plate axis and the true north direction to meet the design precision requirements, the coordinates of the column center point N and the horizontality of the column end plate and the verticality of the column can be checked again. This exemplary embodiment can prevent the precision of the previous adjustment from exceeding the limit during the subsequent adjustment of the column, thereby improving the accuracy of the column adjustment and the precision of the column.

[0085] In an exemplary embodiment of the present disclosure, the method for measuring the accuracy of a heliostat column further includes:

[0086] Obtain an auxiliary tooling, the auxiliary tooling comprising a first bracket 11 and a second bracket 12, the first bracket 11 is provided with a second spherical prism 22 and a third spherical prism 23 at two ends thereof, one end of the second bracket is connected to the center of the first bracket 11, the other end of the second bracket is provided with a first spherical prism 21, and the first bracket 11 is provided with a first positioning pin 31 and a second positioning pin 32;

[0087] The auxiliary tooling is installed on the column end plate of the heliostat through the first positioning pin 31 and the second positioning pin 32, the first positioning pin 31 matches the first positioning hole 41 of the column end plate, and the second positioning pin 32 matches the second positioning hole 42 of the column end plate;

[0088] The first bracket 11 is used as an auxiliary measurement chord; the coordinates of the second spherical prism 22 are used as the coordinates of the second measurement point P2; the coordinates of the third spherical prism 23 are used as the coordinates of the third measurement point P3; and the coordinates of the first spherical prism 21 are used as the coordinates of the first measurement point P1.

[0089] refer to Figure 5 as well as Figure 6 As shown, Figure 5 A schematic diagram of a column end plate is shown. Figure 6A schematic diagram of an auxiliary tooling is shown. The auxiliary tooling may include a first bracket 11 and a second bracket 12 welded vertically, and a second spherical prism 22 and a third spherical prism 23 are respectively connected to opposite ends of the first bracket 11. For example, the second spherical prism 22 and the third spherical prism 23 may be welded and fixed to opposite ends of the first bracket 11, and the supports of the second spherical prism 22 and the third spherical prism 23 may have a fixed angle with the first bracket 11. Similarly, the first spherical prism 21 may be welded to an end of the second bracket 12 away from the first bracket 11. In the embodiments of the present disclosure, various coordinate parameters required for calculation accuracy can be obtained through auxiliary tooling, which is conducive to improving the accuracy and efficiency of column pile adjustment.

[0090] In some other exemplary embodiments, the coordinates of the first measuring point P1, the second measuring point P2, and the third measuring point P3 may be obtained by other means, such as other forms of auxiliary tooling, and are not limited to the auxiliary tooling provided in the present disclosure.

[0091] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A method for measuring the accuracy of a heliostat column, characterized in that: include: Obtain an auxiliary tooling, the auxiliary tooling comprising a first bracket (11) and a second bracket (12), the first bracket (11) having two ends provided with a second spherical prism (22) and a third spherical prism (23), one end of the second bracket being connected to the center of the first bracket (11), the other end of the second bracket being provided with a first spherical prism (21), and the first bracket (11) being provided with a first positioning pin (31) and a second positioning pin (32); The auxiliary tooling is mounted on the column end plate of the heliostat via a first positioning pin (31) and a second positioning pin (32), wherein the first positioning pin (31) matches with a first positioning hole (41) of the column end plate, and the second positioning pin (32) matches with a second positioning hole (42) of the column end plate; The first bracket (11) is used as an auxiliary measurement chord; the distance between the auxiliary measurement chord and the axis of the column end plate is the eccentric height T; The coordinates of the second spherical prism (22) are used as the coordinates of the second measuring point P2; the coordinates of the third spherical prism (23) are used as the coordinates of the third measuring point P3; The coordinates of the first spherical prism (21) are used as the coordinates of the first measuring point P1, and the distance from the first measuring point P1 to the second measuring point P2 is equal to the distance from the first measuring point P1 to the third measuring point P3; Obtaining a first diameter D of the distance from the first measuring point P1 to the auxiliary measuring chord; According to the coordinates X1, Y1, H1 of the first measuring point P1; the coordinates X2, Y2, H2 of the second measuring point P2; the coordinates X3, Y3, H3 of the third measuring point P3, the eccentric height T, and the first diameter D, one or more of the column accuracy parameters are calculated, and the column accuracy parameters include: the coordinates of the column center point N, the angle α between the axis of the column end plate and the north direction, the horizontality of the column end plate, and the verticality of the column.

2. The method for measuring the accuracy of a heliostat column according to claim 1, characterized in that: Calculating the coordinates of the center point N of the column includes: X=T×((X2+X3) / 2-X1) / D+(X2+X3) / 2; Y=T×((Y2+Y3) / 2-Y1) / D+(Y2+Y3) / 2; H=T×((H2+H3) / 2-H1) / D+(H2+H3) / 2; Among them, X, Y, and H are the coordinates of the center point N of the column.

3. The method for measuring the accuracy of a heliostat column according to claim 1, characterized in that: Calculating the angle α between the axis of the column end plate and the true north direction includes: α=MOD(DEGREES(ATAN2((X2-X3), (Y2-Y3))), 360).

4. The method for measuring the accuracy of a heliostat column according to claim 1, characterized in that: Calculating the horizontality of the column end plate includes: Horizontal degree of column end plate = DEGREES(ACOS(D / SQRT((H1-(H2+H3) / 2)²+D²))).

5. The method for measuring the accuracy of a heliostat column according to claim 1, characterized in that: Calculating the verticality of the column includes: Column verticality = DEGREES(ASIN(SQRT((X0-X)²+(Y0-Y)²) / 2 / SQRT(L²+R²))); Among them, L is the length of the column, R is the radius of the column, and X0 and Y0 are the coordinates of the design center point N0.

6. The method for measuring the accuracy of a heliostat column according to claim 2, characterized in that: After calculating the coordinates of the center point N of the column, the method for measuring the accuracy of the heliostat column further includes: calculating the clear height of the column, wherein the clear height of the column=H-Hg, and Hg is the elevation of the ground point of the column.

7. The method for measuring the accuracy of a heliostat column according to claim 2, characterized in that: After calculating the coordinates of the column center point N, the method for measuring the accuracy of the heliostat column further includes: calculating the position difference between the column center point N and the designed center point N0, wherein the position difference between the column center point N and the designed center point N0=SQRT((X0-X)²+(Y0-Y)²), X0 and Y0 are the coordinates of the designed center point N0.

8. The method for measuring the accuracy of a heliostat column according to claim 1, characterized in that: The method for measuring the accuracy of the heliostat column also includes: Calculate the coordinates of the center point N of the column and compare them with the designed center point N0; When the coordinates of the center point N of the column meet the design accuracy, the horizontality of the column end plate and the verticality of the column are calculated; Comparing the horizontality of the column end plate and the verticality of the column with the design accuracy; When the horizontality of the column end plate and the verticality of the column meet the design accuracy, the angle α between the axis of the column end plate and the true north direction is calculated; The angle α between the axis of the column end plate and the true north direction is compared with the design accuracy.

9. The method for measuring the accuracy of a heliostat column according to claim 8, characterized in that: The method for measuring the accuracy of the heliostat column also includes: When the angle α between the axis of the column end plate and the true north direction meets the design accuracy, the coordinates of the column center point N are calculated again and compared with the design center point N0; The horizontality of the column end plate and the verticality of the column are calculated again and compared with the design accuracy.

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