CN103808286A - Total station-based steel structure three dimensional precision detection analysis method and application thereof - Google Patents

Abstract

The invention discloses a total station-based steel structure three dimensional precision detection analysis method and an application thereof; the method provides three set up object space reference modes and two move station measuring modes, so field operation is flexible and convenient; the method can measure three dimensional coordinate data of steel structure construction object model whole feature points, and can carry out whole body and local construction deviation analysis to object model, so later work of the steel structure construction can be smoothly implemented; the beneficial effects are that: 1, the method can improve steel structure detection precision and efficiency, the efficiency can be improved by more than 4 times when compared with a connection detection method, and the data can vividly reflect the deviation in a steel structure object construction process; 2, professional lining and positioning personnel can be more rapidly trained. By employing the technology method, the difficulty of training one professional lining and positioning personnel can be greatly reduced; normally, independently working personnel can be trained by half of a year, and the trained personnel can employ a three dimensional mode to determine construction object model state.

Description

A kind of steel construction three-dimensional accuracy determination method and application thereof based on total powerstation

Technical field

The present invention relates to a kind of steel construction three-dimensional accuracy determination method, belong to technical field of mapping.

Background technology

In spot ship, extra large work construction applications, steel construction construction precision General Requirements reaches grade and even submillimeter level, and this has higher requirement to steel construction accuracy detection.Steel construction accuracy detection refers to, construction mock-up and its of construction designs a model consistent as far as possible, meets tolerance.Along with improving constantly of industry standard, steel construction is built mock-up high precision and is detected the important quality guarantee that has become shipyard and Steel structure manufacturing enterprises.

At present, the existing characterization processes of domestic shipyard and Steel structure manufacturing enterprises still rests on two-dimensional detection-phase, and the form of expression has: plumb bob is hung verticality, ruler amount length, the data obtained manual record etc.This detection means is often difficult to that steel construction is built to mock-up and carries out entirety description, and is difficult to realize anticipation and the pre-service to its state, has increased the pre-group of difficulty that steel construction is built mock-up.And the more operating personnel of the on-the-spot needs of this two-dimensional detecting method, take set of segmentation in shipbuilding as example, plumb bob operation needs 3 people, ruler operation needs 2 to 3 people, complete whole need of work 4 hours, this slows down the construction speed of steel construction greatly, reduces build guality.Owing to there is work high above the ground, measure field danger coefficient is higher.Traditional steel construction two-dimensional detects, and requires operating personnel to have good spatial abstraction ability, by 2-D data, distortion and the size state of building mock-up and total group section is understood, and is implemented specialty line and location.Generally independently operating personnel's cultivation cycle is grown (needing about 10 years), is difficult to meet the demand of industry development.

Summary of the invention

In order to realize the three-dimension integrally description of steel construction being built to mock-up, the present invention is based on modern high precision total station a kind of three-dimensional high-precision determination method is provided.The method can not only be measured steel construction and build the three-dimensional coordinate data of mock-up global feature point, and can carry out entirety and local construction variance analysis to mock-up, guarantees that the follow-up work of steel construction construction is implemented smoothly.Object that the present invention relies on mainly comprises high precision total station and professional Measurement and analysis software, and the Main Function of total powerstation is the basic observation element of measuring measured target, mainly comprises: horizontal direction, vertical angle, oblique distance etc.; The Main Function of Measurement and analysis software is to issue and measure instruction to total powerstation according to user's requirement, and the measurement result of returning is carried out to computational analysis.

The technical solution adopted in the present invention is: build mock-up one bogie side frame at steel construction and establish high precision total station, set up object space benchmark, and in this benchmark, measure the whole unique point three-dimensional coordinates of this side of mock-up by measuring mock-up key feature points.By being arranged on the rotation target of mock-up both sides, total powerstation is removed to mock-up opposite side, and measured residue character point, realize mock-up three-dimension integrally is described.

Steel construction three-dimensional accuracy determination method based on total powerstation, specifically comprises the steps:

A, by total powerstation be erected at steel construction build mock-up front, utilize polar method to measure 2 ~ 3 unique points on mock-up, set up object space benchmark, then positive other unique points of mock-up are measured, and the coordinate of other unique points is included in described object space benchmark;

B, two rotation targets are set respectively in mock-up both sides, measure the coordinate in the object space benchmark that described rotation target sets up in A step;

C, total powerstation is inserted into the described mock-up back side, rotary reflection target simultaneously, all unique points to the mock-up back side and rotation target are measured, and by calculating analysis software, the coordinate of the unique point of surveying at the mock-up back side and rotation target are included in the object space benchmark of setting up in A step;

D, for covert features point, can adopt hidden bar to measure frock subsidiary;

After the three-dimensional coordinate data that E, steel construction build required unique point on mock-up all gathers, set up three-dimensional model, build the holistic approach of mock-up, and build variance analysis with designing a model to compare;

F, generation site work instruct report, and site work personnel build mock-up according to described report to steel construction and carry out pre-service.

In the present invention, described total powerstation field by using Free Station mode, sets up object space benchmark according to steel construction unique characteristics, obtains steel construction and detect required unique point three-dimensional coordinate data in this benchmark.

In the present invention, the angle between described total powerstation and the line of two rotation targets is 45 ° ~ 135 °.

Steel construction three-dimensional accuracy determination method based on total powerstation of the present invention is applied to static measurement scene, in the time being applied to static measurement scene, adopting at 2 and sets up object space benchmark, removes station at 2 and measures.

Steel construction three-dimensional accuracy determination method based on total powerstation of the present invention is applied to kinetic measurement scene, in the time being applied to kinetic measurement scene, adopting at 3 and sets up object space benchmark, removes station at 3 and measures.

The present invention builds mock-up and field condition according to steel construction, provides three kinds to set up object space benchmark mode, and convenient working personnel set up object space benchmark intuitively.Removing station measure provide 2 remove station and 3 remove station two kinds of modes, solved space wide-angle high-precision rotary convert, surveyed unique point three-dimensional coordinate is unified in object space benchmark.

The front and back that the present invention has overcome original two-dimentional accuracy control data cannot make full use of, the drawback that cannot continue, make building course realize three-dimensional dimension visualized management, can realize all construction mock-ups in steel construction building course, the size detection under free position; Realize with build mock-up and design a model between digitizing contrast; Realize the digitizing contrast of building between mock-up and build the side.

Accompanying drawing explanation

Fig. 1 is that initial point-1, X-axis point 2 are set up benchmark schematic diagram;

Fig. 2 is that X-axis point 1-point 2, Y-axis point 3 are set up benchmark schematic diagram;

Fig. 3 is that X-axis point 1-point 2, Z axis point 3 are set up benchmark schematic diagram;

Fig. 4 is for moving station instrumentation plan.

Embodiment

The concrete implementation step of steel construction three-dimensional accuracy determination method based on high precision total station is as follows:

A, high precision total station is erected to steel construction builds mock-up front, utilize polar method to measure on mock-up 2 or 3 unique points and set up object space benchmark, positive other unique points of mock-up are measured, and included in this object space benchmark.Shown in Fig. 1, adopt set up object space benchmark at 2, in static measuring state, using the 1st initial point as coordinate system, cross the pedal line direction of this point as Z-direction, the 2nd definite XZ vertical guide, right-handed coordinate system determines that Y direction sets up coordinate system; Shown in Fig. 2 (Fig. 3), adopt set up object space benchmark at 3, in nonstatic measuring state, using the 1st initial point as coordinate system, the 2nd definite X-axis, the 3rd definite XY plane (or XZ plane), right-handed coordinate system determines that Z axis (or Y-axis) direction sets up coordinate system.

B, two high-acruracy surveys rotation targets are set respectively on the settling position of mock-up both sides, and measure its coordinate in object space benchmark.For guaranteeing in-site measurement precision, requiring the angle between total powerstation and the line of two rotation targets is 45 ° ~ 135 °.

C, total powerstation is inserted into the mock-up back side, rotary reflection target simultaneously, measures rotation target and all unique points in the back side, by calculating analysis software, mock-up unique point that the back side is surveyed is together included in to object space benchmark (as Fig. 4).

D, for covert features point, can adopt hidden bar to measure frock subsidiary;

After on E, steel construction construction mock-up, required unique point three-dimensional coordinate data all gathers, can set up complete three-dimensional model, by this measurement model being carried out to the operations such as translation, rotation, build the holistic approach of mock-up, and build variance analysis with designing a model to compare;

F, generation site work instruct report, and site work personnel build mock-up to steel construction accordingly and carry out pre-service.

The present invention based on principle be:

1. set up object space benchmark

Total station survey obtains the three-dimensional coordinate of measuring point under survey station coordinate system, considers the needs of actual measurement operation and data analysis, and system is being measured unique point coordinate simultaneously, sets up measure coordinate system take testee as main body.And follow-up measuring point coordinate is transformed into and is measured coordinate system O-XYZ from survey station coordinate system A-xyz.The foundation of coordinate system has following two kinds of situations.

1.1 two object space benchmark

Set up object space benchmark according to two points measuring at first, using first initial point as coordinate system, cross the pedal line direction of first as Z-direction, first with the definite vertical guide of second point as XZ plane, cross first and set up object space benchmark with the direction of XZ planar quadrature as Y direction.As shown in Figure 1, by two points measuring at first, the vertical guide of put 1, point 2 is definite is as XZ plane, to put 1 initial point as coordinate system, cross a little 1 pedal line direction as Z-direction, cross point 1 and set up coordinate system with the direction of XZ planar quadrature as Y direction.

Set up coordinate system according to this method, point 2 coordinates are:

$\left\{\begin{array}{c}{X}_2=\sqrt{{(x_2-x_1)}^2+{(y_2-y_1)}^2}\\ Y_2=0\\ Z_2=z_2-z_1\end{array}\right.---\left(1\right)$

Follow-up measuring point coordinate, according to substep transformation model, is converted to this measurement coordinate system from survey station coordinate system.

1.2 3 object space benchmark

Set up object space benchmark according to three points measuring at first, using first initial point as coordinate system, second point and first 's line is as X-axis, thirdly with the line of first as Y-axis (or Z axis).

1. the coordinate system that X-axis point 1-point 2, Y-axis point 3 are set up

Using plane definite three points measuring at first as XY plane, to put 1 as coordinate origin, point 1 and point 2 line directions, as X-axis, are crossed point 1 and set up coordinate system as shown in Figure 2 with the direction of XY planar quadrature as Z-direction.

In this coordinate system, point 2 coordinates are:

$\left\{\begin{array}{c}{X}_2=\sqrt{{(x_2-x_1)}^2+{(y_2-y_1)}^2+{(z_2-z_1)}^2}\\ Y_2=0\\ Z_2=0\end{array}\right.---\left(2\right)$

Point 3 coordinates are:

$\left\{\begin{array}{c}{X}_3=(S_{13}^2+S_{12}^2-S_{23}^2)/{2S}_{12}\\ Y_3=\sqrt{[{(S_{12}+S_{23})}^2-S_{13}^2][S_{13}^2-{(S_{12}-S_{23})}^2]}\\ Z_3=0\end{array}/{2S}_{12}\right.---\left(3\right)$

Wherein,

$S_{13}=\sqrt{{(x_3-x_1)}^2+{(y_3-y_1)}^2+{(z_3-z_1)}^2}---\left(4\right)$

$S_{23}=\sqrt{{(x_3-x_2)}^2+{(y_3-y_2)}^2+{(z_3-z_2)}^2}---\left(5\right)$

$S_{12}=\sqrt{{(x_2-x_1)}^2+{(y_2-y_1)}^2+{(z_2-z_1)}^2}---\left(6\right)$

Follow-up measuring point coordinate, according to three-dimension integrally transformation model, is converted to this measurement coordinate system from survey station coordinate system.

2. the coordinate system that X-axis point 1-point 2, Z axis point 3 are set up

Using plane definite three points measuring at first as plane, to put 1 as coordinate origin, point 1 and point 2 line directions, as axle, are crossed point 1 and set up coordinate system as shown in Figure 3 with the direction of planar quadrature as direction of principal axis.

In this coordinate system, point 2 coordinates are:

$\left\{\begin{array}{c}{X}_2=\sqrt{{(x_2-x_1)}^2+{(y_2-y_1)}^2+{(z_2-z_1)}^2}\\ Y_2=0\\ Z_2=0\end{array}\right.---\left(7\right)$

Point 3 coordinates are:

$\left\{\begin{array}{c}{X}_3=(S_{13}^2+S_{12}^2-S_{23}^2)/{2S}_{12}\\ Y_3=0\\ Z_3=\sqrt{[{(S_{12}+S_{23})}^2-S_{13}^2][S_{13}^2-{(S_{12}-S_{23})}^2]}/{2S}_{12}\end{array}\right.---\left(8\right)$

Wherein S ₁₃, S ₂₃, S ₁₂the same.

Follow-up measuring point coordinate, according to three-dimension integrally transformation model, is converted to this measurement coordinate system from survey station coordinate system.

2. Data Matching

In coordinate acquisition module and data analysis module, all relate to the problem of coordinate conversion, for improving real work efficiency, guarantee coordinate conversion precision, native system provides following two kinds of transformation models, that is: substep transformation model and three-dimension integrally transformation model.

2.1 substep transformation models

The mathematical model more complicated of bikini transformation model, amount of calculation is also larger, therefore, and in real work, the pattern that generally adopts plane and elevation to change respectively.Two point form transformation model carries out coordinate system conversion by 2 common points.Its core concept is under the constant condition of vertical, plane and elevation coordinate to be changed respectively guaranteeing.

1. " the conversion of planimetric coordinates

As shown in Figure 4, coordinate system O-XY is for measuring coordinate system, and coordinate system A-xy is survey station coordinate system.Relation between two coordinate systems is as follows:

$\left(\begin{array}{c}{x}_p\\ y_p\end{array}\right)=\left(\begin{array}{c}{x}_O\\ y_O\end{array}\right)+\mathrm{\κ}\left(\begin{array}{cc}\cos \mathrm{\α}& -\sin \mathrm{\α}\\ \sin \mathrm{\α}& \cos \mathrm{\α}\end{array}\right)\left(\begin{array}{c}{X}_p\\ Y_p\end{array}\right)---\left(9\right)$

In formula, $\left(\begin{array}{c}{x}_O\\ y_O\end{array}\right)$ For coordinate translation amount; κ is yardstick conversion factor; α is the anglec of rotation of coordinate axis.

During more than two, can solve conversion parameter at common point by least square method, and obtain the mathematical model of conversion:

$\left\{\begin{array}{c}x=f({\hat{x}}_o,{\hat{y}}_o,\widehat{\mathrm{\κ}},\widehat{\mathrm{\α}})={\hat{x}}_o+\widehat{\mathrm{\κ}}\·X\·\cos \widehat{\mathrm{\α}}-\widehat{\mathrm{\κ}}\·Y\·\sin \widehat{\mathrm{\α}}\\ y=g({\hat{x}}_o,{\hat{y}}_o,\widehat{\mathrm{\κ}},\widehat{\mathrm{\α}})={\hat{y}}_o+\widehat{\mathrm{\κ}}\·X\·\sin \widehat{\mathrm{\α}}+\widehat{\mathrm{\κ}}\·Y\·\cos \widehat{\mathrm{\α}}\end{array}\right.---\left(10\right)$

For solving conversion parameter, (10) formula is carried out to linearization, obtain error equation as follows:

$\left\{\begin{array}{c}{v}_x={\left(\frac{\∂f}{\∂x_o}\right)}_{0}d{x}_o+{\left(\frac{\∂f}{\∂y_o}\right)}_{0}d{y}_o+{\left(\frac{\∂f}{\∂\mathrm{\κ}}\right)}_0\mathrm{d\κ}+{\left(\frac{\∂f}{\∂\mathrm{\α}}\right)}_0\mathrm{d\α}-(x-f(x_o^0,y_o^0,{\mathrm{\κ}}^0,{\mathrm{\α}}^0))\\ v_y={\left(\frac{\∂g}{\∂x_o}\right)}_{0}d{x}_o+{\left(\frac{\∂g}{\∂y_o}\right)}_{0}d{y}_o+{\left(\frac{\∂g}{\∂\mathrm{\κ}}\right)}_0\mathrm{d\κ}+{\left(\frac{\∂g}{\∂\mathrm{\α}}\right)}_0\mathrm{d\α}-(y-g(x_o^0,y_o^0,{\mathrm{\κ}}^0,{\mathrm{\α}}^0))\end{array}\right.---\left(11\right)$

Order

$a_{11}={\left(\frac{\∂f}{\∂x_o}\right)}_0$ $a_{12}={\left(\frac{\∂f}{\∂y_o}\right)}_0$ $a_{13}={\left(\frac{\∂f}{\∂\mathrm{\κ}}\right)}_0$ $a_{14}={\left(\frac{\∂f}{\∂\mathrm{\α}}\right)}_0$

$a_{21}={\left(\frac{\∂g}{\∂x_o}\right)}_0$ $a_{22}={\left(\frac{\∂g}{\∂y_o}\right)}_0$ $a_{23}={\left(\frac{\∂g}{\∂\mathrm{\κ}}\right)}_0$ $a_{24}={\left(\frac{\∂g}{\∂\mathrm{\α}}\right)}_0$

$l_{11}=x-f(x_o^0,y_o^0,{\mathrm{\κ}}^0,{\mathrm{\α}}^0)=x-x^0;$ $l_{21}=y-g(x_o^0,y_o^0,{\mathrm{\κ}}^0,{\mathrm{\α}}^0)=y-y^0.$

Note

$V=\left(\begin{array}{c}{v}_x\\ v_y\end{array}\right)$ $B=\left(\begin{array}{cccc}{a}_{11}& a_{12}& a_{13}& a_{14}\\ a_{21}& a_{22}& a_{23}& a_{24}\end{array}\right)$ t＝(dx _o dy ₀ dκ dα) ^T $l=\left(\begin{array}{c}{l}_{11}\\ l_{21}\end{array}\right)$

There is error equation

V＝Bt-l （12）

In above formula, t is the conversion parameter reduction between coordinate system.For asking four parameters, must there be two groups of above-mentioned system of equations, choose to such an extent that control is counted otherwise is less than two.In the time that control is counted more than two, just there is redundant observation, at this moment by least square adjustment principle, at V ^tsolve un-known parameters under the condition of PV=min.

The conversion of elevation

The conversion of altitude figures can adopt the method being averaging, being calculated as follows of conversion parameter:

$\hat{h}=\frac{l}{n}\underset{i-l}{\overset{n}{\mathrm{\Σ}}}(Z_i-z_i)---\left(13\right)$

3. coordinate conversion

The conversion parameter that utilization is tried to achieve with

can be by the coordinate conversion of the point in A-xy to O-XY coordinate system:

$\left\{\begin{array}{c}X=\frac{1}{\widehat{\mathrm{\κ}}}(x\·\cos \widehat{\mathrm{\α}}+y\·\sin \widehat{\mathrm{\α}}-{\hat{x}}_o\·\cos \widehat{\mathrm{\α}}-{\hat{y}}_o\·\sin \widehat{\mathrm{\α}})\\ Y=\frac{1}{\widehat{\mathrm{\κ}}}(y\·\cos \widehat{\mathrm{\α}}-x\·\sin \widehat{\mathrm{\α}}-{\hat{y}}_o\·\cos \widehat{\mathrm{\α}}+{\hat{x}}_o\·\sin \widehat{\mathrm{\α}})\\ Z=z+\hat{h}\end{array}\right.---\left(14\right)$

2.2 three-dimension integrally transformation models

In geodetic surveying, three-dimensional coordinate transformation model is the focus of research always, and wherein Bursa-Wolf model, Molodensky model and the military model of surveying, be widely applied.But these models are only applicable to the three-dimensional references conversion that the anglec of rotation is less, cannot meet the requirement to any anglec of rotation conversion in engineering survey.Improvement formula based on Gaussian-Newton method herein, research three-dimensional coordinate non-linear conversion model.

1. three-dimensional coordinate transformation model

Three-dimensional coordinate transformation model is:

Wherein:

represent the coordinate under the new coordinate system after coordinate conversion,

represent the coordinate under old coordinate system, [Δ X Δ Y Δ Z] ^tfor shift factor, μ is scaling factor, and R is rotation of coordinate matrix.

Rotation of coordinate matrix R formation process is: first coordinate axis is rotated counterclockwise to φ around X-axis, obtains rotation matrix R _x; Again coordinate axis is rotated counterclockwise around new Y-axis

obtain rotation matrix R _y, finally coordinate axis is rotated counterclockwise to θ around new Z axis, obtain rotation matrix R _z, above 3 rotations are merged and get final product to obtain rotation of coordinate matrix R.That is:

By the linearizing error equation of (16) formula substitution (15) formula:

V＝Bdt-L （17）

Wherein: $V=\left[\begin{array}{c}{V}_X\\ V_Y\\ V_Z\end{array}\right]$ $B=\left[\begin{array}{ccccccc}1& 0& 0& a_1& a_2& a_3& k_1\\ 0& 1& 0& b_1& b_2& b_3& k_2\\ 0& 0& 1& c_1& c_2& c_3& k_3\end{array}\right]$ $L=\left[\begin{array}{c}{l}_X\\ l_Y\\ l_Z\end{array}\right]$

c ₃＝0

L _x=X _newly-Δ X ⁰+ μ ⁰k ₁

L _y=Y _newly-Δ Y ⁰+ μ ⁰k ₂

L _z=Z _newly-Δ Z ⁰+ μ ⁰k ₃

2. the improvement based on-Gauss's Newton iteration method

The basic ideas of Gauss-Newton method are at initial value t ⁰place carries out linear-apporximation to nonlinear model, and calculates first approximation t by traditional error compensation method ¹, then iterate, until twice of front and back gained V ^tv value equates.Iterative manner according to this algorithm is known, and iterative process is stronger to the dependence of initial value.In the time that the nonlinear strength of nonlinear model is weak, Gauss-Newton method is good method, otherwise, in the time that initial value is poor, easily disperse.In order to overcome this shortcoming, need improve Gauss-Newton method, to weaken the impact of initial value on Iterations of Multi.

If t ^(k)true value t ^*approximate value, V ^tv (t ^(k)) necessarily can not reach minimum, so have

and there is λ ^*> 0, makes λ ∈ [0, λ ^*] time, there is V ^tv (t ^(k)+ λ dt ^(k)) < V ^tv (t ^(k)), control thus iterative process convergence, make the value of solving progressively approach true value.Design thus three dimensional non-linear coordinate conversion calculation process.In computation process, first calculate k step parameter correction dt according to (17) formula ^(k), then adopt 3 para-curves to solve step-size in search λ to R (t) ^(k), computing method are as shown in (18) formula.

${\mathrm{\&lambda;}}^{\left(k\right)}=\frac{1}{2}+\frac{R\left(t^{\left(k\right)}\right)-R(t^{\left(k\right)}+{\mathrm{dt}}^{\left(k\right)})}{4[R\left(t^{\left(k\right)}\right)-2R(t^{\left(k\right)}+\frac{1}{2}{\mathrm{dt}}^{\left(k\right)})+R(t^{\left(k\right)}+{\mathrm{dt}}^{\left(k\right)})]}---\left(18\right)$

Beneficial effect of the present invention is mainly reflected in: 2 people get final product data acquisition work, required time is 1-2 hour, efficiency raising reaches more than 4 times, and data are fed back visually, cultivate 1 by three dimensional constitution, specialty line and location personnel's difficulty that mock-up/total group section state is built in judgement reduce.Generally, within 2 years, can turn out the personnel of independently working.

In sum, it is only preferred embodiment of the present invention, not be used for limiting scope of the invention process, all equalizations of doing according to the shape described in the claims in the present invention scope, structure, feature and spirit change and modify, and all should be included within the scope of claim of the present invention.

Claims (5)

1. the steel construction three-dimensional accuracy determination method based on total powerstation, is characterized in that, comprises the steps:

A, by total powerstation be erected at steel construction build mock-up front, utilize polar method to measure 2 ~ 3 unique points on mock-up, set up object space benchmark, then positive other unique points of mock-up are measured, and the coordinate of other unique points is included in described object space benchmark;

B, two rotation targets are set respectively in mock-up both sides, measure the coordinate in the object space benchmark that described rotation target sets up in A step;

C, total powerstation is inserted into the described mock-up back side, rotary reflection target simultaneously, all unique points to the mock-up back side and rotation target are measured, and by calculating analysis software, the unique point coordinate of surveying at the mock-up back side and rotation target coordinate are included in the object space benchmark of setting up in A step;

D, for covert features point, adopt hidden bar to measure frock subsidiary;

After the three-dimensional coordinate data that E, steel construction build required unique point on mock-up all gathers, set up three-dimensional model, build the holistic approach of mock-up, and build variance analysis with designing a model to compare;

F, generation site work instruct report, and site work personnel build mock-up according to described report to steel construction and carry out pre-service.

2. the steel construction three-dimensional accuracy determination method based on total powerstation according to claim 1, is characterized in that, described total powerstation field by using Free Station mode.

3. the steel construction three-dimensional accuracy determination method based on total powerstation according to claim 1, is characterized in that, the angle between described total powerstation and the line of two rotation targets is 45 ° ~ 135 °.

4. the steel construction three-dimensional accuracy determination method based on total powerstation claimed in claim 1 is applied to static measurement scene, in the time being applied to static measurement scene, adopting at 2 and sets up object space benchmark, removes station at 2 and measures.

5. the steel construction three-dimensional accuracy determination method based on total powerstation claimed in claim 1 is applied to kinetic measurement scene, in the time being applied to kinetic measurement scene, adopting at 3 and sets up object space benchmark, removes station at 3 and measures.

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