A kind of method of applying without the distortion of prism photoelectricity total station survey power transmission and transformation pylon
Technical field
The present invention relates to a kind of structure measuring method, particularly a kind of method of applying without the distortion of prism photoelectricity total station survey power transmission and transformation pylon.
Background technology
Along with the continuous upgrading of grid electric pressure, to the also progressively raising of requirement of power transmission and transformation pylon height and load-bearing capacity.And these power transmission and transformation pylons are in the physical environments such as ice and snow, strong wind, its distortion directly has influence on reliability and the security of equipment.The space structure that the power transmission and transformation pylon is is normally connected and composed by bolt bias by single angle, have that size is large, distortion is large, measuring point is many and the characteristics such as 3 D deformation, and it is a technical barrier that the application total powerstation carries out accurate deformation measurement to it.
In the use total powerstation carries out measuring process, because the laser beam emission has linear characteristics, strong to some disguises or be blocked impact point, must be by conversion total station survey website (abbreviation changes station), to the direct method of measuring of impact point, again the lower impact point unification of measuring of different azimuth (different website) is transformed in same coordinate system, and then determines the mutual alignment relation between all impact points.Change the error of measuring at station and be mainly derived from three aspects: range error, angle error and point of fixity error, wherein range error is all relevant to the instrument pointing accuracy with angle error, and the point of fixity error is when coordinate transform, mainly containing point of fixity participates in calculating, determine that coordinate system changes distance and the angle changed before and after station, once the point of fixity position, twice measurement, change, all can giving converts introduces error.
The no prism leveling technology is based on the phase method principle, and the laser beam of sending is very narrow, can very accurately get on target, guarantees high-precision range observation.With the prism measurement is arranged, compare, its advantage is as long as the reflecting medium of measuring point meets the condition of no prism leveling, just need on measuring point, not place prism, can measure the three-dimensional coordinate of this point.Technique is widely used in worldwide, and it has good technical manual: high precision, on a large scale, there is visible red laser spot and very little beam diameter.
Summary of the invention
Technical matters to be solved by this invention is, for the prior art deficiency, provide a kind of method of applying without the distortion of prism photoelectricity total station survey power transmission and transformation pylon, by setting up two coordinate systems, point of fixity is set and changes the error that cause at station in avoiding measuring, improve measuring accuracy and efficiency.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method of applying without the distortion of prism photoelectricity total station survey power transmission and transformation pylon, and the method is:
1) set up pylon and analyze coordinate system: choose bottommost horizontal corner steel in the pylon visual range, if two end points of described bottommost horizontal corner steel are respectively A, B point, the tower foundation planar central of take is analyzed the initial point of coordinate system as pylon, it is to point to the B point from the A point that pylon is analyzed the coordinate system X-direction, Y direction is for straight up, and Z-direction is determined by the right-hand rule of space vector;
2) set up the total station survey coordinate system: in the scope of ordering at visual above-mentioned A, B, set up total powerstation, the true origin that the described total powerstation central point of take is the total station survey coordinate system, take from initial point sensing A point or B point place direction is total station survey coordinate system X-direction, and the angle of total station survey coordinate system X-axis and above-mentioned pylon analysis coordinate system X-axis or X-axis extended line
be less than 90, the direction straight up of take is total station survey coordinate system Y direction, total station survey coordinate system Z-direction is determined by the right-hand rule of space vector, and is made described total station survey coordinate system X-Z plane and above-mentioned pylon analyze the X-Z plane parallel of coordinate system;
3) calculate the total station survey coordinate and be tied to pylon analysis Conversion Matrix of Coordinate: the coordinate figure of measuring A, B in the total station survey coordinate system is respectively
with
, calculate the X-axis angle that pylon is analyzed coordinate system and total station survey coordinate system
,
, obtain the rotational transform matrix; Analyze in coordinate system and calculate the coordinate figure that A is ordered at pylon
, obtain the translation transformation matrix;
4) measure that electric transmission pole tower is set a roof beam in place or the distortion of electric transmission pole tower trestle: choose that electric transmission pole tower is set a roof beam in place or the electric transmission pole tower trestle on the measuring point that is evenly distributed more than 5, measure the D coordinates value of each measuring point in the total station survey coordinate system, the D coordinates value of each measuring point is multiplied by the rotational transform matrix, then respectively with the addition of translation transformation matrix, obtain each measuring point and analyze the coordinate figure in coordinate system at pylon, by the gained coordinate figure, more the initial line style of the line style of corresponding coordinate points and power transmission and transformation pylon obtains that electric transmission pole tower is set a roof beam in place or electric transmission pole tower trestle deformation direction and be out of shape value.
Compared with prior art, the beneficial effect that the present invention has is: the present invention proposes a kind of application photoelectricity total station survey power transmission tower frame deformation method, set up two independently coordinate systems---analyze coordinate system and measure coordinate system, analyze coordinate system with power transmission tower frame self structure installation, measure coordinate system and set up setting in conjunction with total powerstation, the computation and measurement coordinate is tied to the rotation peace transfer of analyzing coordinate system and changes matrix, complete corresponding measurement in measuring coordinate system, then all coordinate conversion are analyzed to analyzing coordinate system, relatively obtain direction and the value of distortion by line style, method of the present invention arranges the problems such as point of fixity and converted measurement coordinate points in having solved and having measured, and guarantees each measurement data independence, has eliminated the measuring error of point of fixity in the converted measurement website, has improved measuring accuracy and efficiency.
The accompanying drawing explanation
Fig. 1 is the inventive method process flow diagram;
Fig. 2 is that one embodiment of the invention is that power transmission tower frame is analyzed the coordinate system schematic diagram;
Fig. 3 is that one embodiment of the invention is analyzed coordinate system and the measurement coordinate system arranges graph of a relation.
Embodiment
As shown in Figure 1, method of the present invention comprises the following steps:
The 1st step, set up pylon and analyze coordinate system.
Choose bottommost horizontal corner steel in the pylon visual range, as shown in Figure 2, two end points of angle steel are set and are respectively A, B point.The initial point of pylon coordinate system arranges pylon foot (basis) planar central, and X-direction is that the A point points to the B point, and Y direction is for straight up, and Z-direction is determined by the right-hand rule of space vector.
The 2nd step, set up the total station survey coordinate system.
Set up arbitrarily total powerstation in visual A, B point range, true origin is the total powerstation central point, X-axis is that initial point points to A(or B) some place direction, be less than 90 with the angle of analyzing X-direction in coordinate system, Y direction straight up, Z-direction is definite by the right-hand rule of space vector, and the setting of coordinate and measurement coordinate is analyzed as shown in Figure 3 in total station survey coordinate system X-Z plane and the X-Z plane parallel of analyzing coordinate system.
The 3rd step, the computation and measurement coordinate is tied to the analysis Conversion Matrix of Coordinate.
The coordinate figure of measuring A, B in measuring coordinate system is respectively
with
, computational analysis coordinate system and the X-axis angle of measuring coordinate system
,
, the rotational transform matrix is
; Calculate the coordinate figure that A is ordered in analyzing coordinate system
, the translation transformation matrix is
.
The 4th step, electric transmission pole tower (post) deformation measurement analysis of setting a roof beam in place.
Choose electric transmission pole tower (post) the upper measuring point be evenly distributed more than 5 of setting a roof beam in place, measure the D coordinates value of each point in measuring coordinate system, add the translation transformation matrix with the rotational transform Matrix Multiplication with coordinate figure, obtain the coordinate figure of measuring point in analyzing coordinate system, the initial line style of the line style of gained coordinate points and power transmission and transformation pylon relatively can be obtained to beam (post) deformation direction and value.
When without prism photoelectricity total powerstation, the power transmission and transformation pylon being carried out to deformation observation, owing between observation station and object of observation, having barrier, affected the observation of the horizontal corner steel of pylon foot.The present invention observes with total powerstation, and the visual range in the present invention refers to that total powerstation can observe the scope of pylon foot horizontal corner steel.
In order to obtain more accurately the deformation curve of pylon, the present invention chooses 5 above measuring points, guarantees measuring accuracy simultaneously and measures efficiency.