CN105651235B - The measurement method and device in profile face in antenna house - Google Patents
The measurement method and device in profile face in antenna house Download PDFInfo
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- CN105651235B CN105651235B CN201410844095.5A CN201410844095A CN105651235B CN 105651235 B CN105651235 B CN 105651235B CN 201410844095 A CN201410844095 A CN 201410844095A CN 105651235 B CN105651235 B CN 105651235B
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Abstract
The invention discloses the measurement method and device in profile face in a kind of antenna house, this method includes：Vertical several initial cross-section line H of equidistant partition on the theoretical model curved surface of antenna housei；Intersection is sought with profile face in particular cross section and antenna house theory, obtains two initial measurement lines；According to the discrete initial measurement line of each initial measurement curvature of a curve, the first measurement point and its method arrow are obtained；It is measured based on the internal profile face of the first measurement point, obtains coordinate data；Two measurement section lines of construction, and profile face in initial is constructed in the range of particular cross section；Determine measuring route line；Discrete measuring route line determines the second measurement point and its method arrow；Initial interior profile face is measured, the coordinate data of the second measurement point is obtained；The coordinate data of second measurement point is fitted to obtain the interior profile surface model of antenna house.The present invention can accurately realize that the cross-section of antenna house measures, and reduce the error that path planning is brought, and realize the finishing in profile face in antenna house.
Description
Technical field
The present invention relates to technical field of satellite navigation, and in particular to the measurement method and dress in profile face in a kind of antenna house
It sets, is used for the accurate measurement and amendment in composite antenna housing type face.
Background technology
Antenna house is a kind of depth thin-wall construction body big made of fragile material, and shape is former according to aerodynamics
The high math power curved surface for managing design, is typical 3 D complex free form surface large thin-wall part.This crisp and hard material is not only difficult to be added
Work, and due to the dispersibility of material dielectric constant and the presence of cover wall geometric thickness deviation, the antenna house after semifinishing is difficult
To meet the requirement of radome electrical property energy.In order to ensure radome electrical property can requirement, need to analyze electric thickness and geometric thickness,
The dielectric constant of material, and the antenna house after semifinishing is finished, error compensation is carried out according to electric thickness requirement.
Profile curved surface is complicated free form surface after semifinishing in antenna house, in order to realize good electrical property, is needed internally
Profile curved surface carries out precision molding.
Due to design features such as the big depth of antenna house, thin-walleds, when mechanical processing, lacks reliable and stable technological datum, needs
Centering is carried out to antenna house and alignment just can guarantee machining accuracy.Antenna house belongs to Complex Surface Part, without fixed technique
Benchmark carries out centering, carrys out centering generally by antenna house measurement point is matched with antenna house curved surface.Therefore, it accurately obtains
Take actual antennas cover surface model most important.A committed step is the rule to measuring route in complex-curved measurement
It draws, the quality of measurement path planning directly affects the precision measured.Profile face is free form surface in antenna house, and when measurement is general
It is measured according to the contact measurement method of " curved surface-curve-point set-measurement ".There are many ways to contact type measurement, compare
Common measurement method has the methods of parallel cross-section measurement, radial plane measurement, helix measurement.It is freely bent to antenna house etc.
For surface parts, reconstruction model generally uses parallel cross-section measurement method, can guarantee the measurement data of acquisition as possible at one
In plane, be conducive to the reconstruct of threedimensional model.Parallel cross-section measurement method is with one group perpendicular to the flat of antenna house central shaft
Profile face obtains one group of closed experiment curv in face interception antenna house, obtains several measurement points on measuring line respectively, measures
Machine is measured according to point coordinates and tactile direction of surveying is measured.Antenna house uses the process that parallel cross-section measurement method measures
In, due to the deformation of curved surface and the influence of mismachining tolerance, directly according to cross-section measure line measure, gauge head cannot according to etc.
Section carries out touching survey, it is difficult to which accurately control measurement point is in a section.Eyeball and theoretical measurement point in this way is misaligned, leads
It causes reconstruction model to generate larger error with actual processing model, influences antenna house and further finish.
Invention content
In view of this, to overcome above-mentioned at least one disadvantage, and following at least one advantages are provided, the invention discloses one
The measurement method and device in profile face in kind antenna house reduce path planning accurately to realize that the cross-section of antenna house measures
The error brought realizes the finishing in profile face in antenna house.
In order to solve the above technical problems, the present invention uses following technical scheme：
The measurement method in profile face in a kind of antenna house, including：
Step S11, vertical equidistant on the theoretical model curved surface of the antenna house along the central axis direction of the antenna house
Divide several initial cross-section line Hi；
Step S12, for initial cross-section line H described in eachi, with section Zi=Hi+ δ and Zi=Hi- δ and the antenna house
Theory in profile face seek intersection, obtain two initial measurement line Hi1And Hi2, wherein 0<δ≤1mm；
Step S13, according to each initial measurement line Hi1The discrete initial measurement line H of curvaturei1, and according to each institute
State initial measurement line Hi2The discrete initial measurement line H of curvaturei2, obtain corresponding to the initial measurement line Hi1And Hi2If
The normal vector of dry the first measurement point and each first measurement point；
Step S14, profile face in the theory is measured with first measurement point respectively, obtains each described first
The coordinate data of measurement point；
Step S15, the coordinate data based on first measurement point constructs two and measures section line H 'i1With H 'i2, and base
In two measurement section line H 'i1With H 'i2In Zi=Hi+ δ and Zi=HiProfile face in initial is constructed between-δ；
Step S16, with Zi=HiThe initial interior profile face is intercepted, using accessed section line as measurement
Path-line；
Step S17, according to measuring route line described in measuring route curvature of a curve and discrete length, several the second surveys are determined
Amount point and the normal vector for calculating each second measurement point；
Step S18, the initial interior profile face is measured with second measurement point and its normal vector, obtains institute
State the coordinate data of the second measurement point；And
Step S19, the coordinate data of second measurement point is fitted, obtains the interior profile face mould of the antenna house
Type.
The measurement method in profile face in antenna house as described above, in one possible implementation, the step S13
It is middle to use equidistant discrete method or wait arc length discrete method to the initial measurement line Hi1And Hi2It carries out discrete.
The measurement method in profile face in antenna house as described above, in one possible implementation, the step S15
It is middle that the measurement section line H ' is constructed using nurbs curve approximating methodi1With H 'i2。
The measurement method in profile face in antenna house as described above, in one possible implementation, the step S15
It is middle that the measurement section line H ' is constructed using Bezier curve approximating method or B-Spline curve-fitting methodsi1With H 'i2。
The measurement method in profile face in antenna house as described above, in one possible implementation, the step S19
It is middle that the coordinate data of second measurement point is fitted using nurbs curve approximating method.
The measuring device in profile face in a kind of antenna house, including：
Initial cross-section line division module, for the central axis direction along the antenna house, in the theoretical mould of the antenna house
Several initial cross-section line H of vertical equidistant partition on type curved surfacei；
Initial measurement line determining module, for for initial cross-section line H described in eachi, with section Zi=Hi+ δ and Zi=
Hi- δ seeks intersection with profile face in the theory of the antenna house, obtains two initial measurement line Hi1And Hi2, wherein 0<δ≤1mm；
First discrete block, for according to each initial measurement line Hi1The discrete initial measurement line H of curvaturei1, and
According to each initial measurement line Hi2The discrete initial measurement line H of curvaturei2, obtain corresponding to the initial measurement line Hi1
And Hi2Several first measurement points and each first measurement point normal vector；
First measurement module is obtained for being measured respectively to profile face in the theory with first measurement point
The coordinate data of each first measurement point；
Interior profile surface construction module constructs two measurement section lines for the coordinate data based on first measurement point
H′i1With H 'i2, and it is based on two measurement section line H 'i1With H 'i2In Zi=Hi+ δ and Zi=HiIt is constructed between-δ
Profile face in initial；
Measuring route line determining module, for Zi=HiThe initial interior profile face is intercepted, it will be accessed
Section line is as measuring route line；
Second discrete block is used for according to measuring route line described in the measuring route curvature of a curve and discrete length, really
Several fixed second measurement points and the normal vector for calculating second measurement point；
Second measurement module, for being surveyed to the initial interior profile face with second measurement point and its normal vector
Amount obtains the coordinate data of second measurement point；And
Interior profile surface model determining module is fitted for the coordinate data to second measurement point, is obtained described
The interior profile surface model of antenna house.
The measuring device in profile face in antenna house as described above, in one possible implementation, described first from
Module is dissipated using equidistant discrete method or waits arc length discrete method to the initial measurement line Hi1And Hi2It carries out discrete.
The measuring device in profile face in antenna house as described above, in one possible implementation, the interior profile
Surface construction module constructs the measurement section line H ' using nurbs curve approximating methodi1With H 'i2。
The measuring device in profile face in antenna house as described above, in one possible implementation, the interior profile
Surface construction module constructs the measurement section line H ' using Bezier curve approximating method or B-Spline curve-fitting methodsi1
With H 'i2。
The measuring device in profile face in antenna house as described above, in one possible implementation, the interior profile
Surface model determining module is fitted the coordinate data of each second measurement point using nurbs curve approximating method.
By using above-mentioned technical proposal, it is of the invention reached have the beneficial effect that：Pass through initial measurement reverse antenna
Profile face in reality under cover deformation state, it is measuring route line then to seek profile face section line in reality, will finally be measured
Path-line is discrete to swear for measurement point and method, and final measuring machine measures antenna house according to measurement point and method arrow.The measurement side
Method ensure that requirement of the measurement data on the same cutting plane, be easy to carry out solid modelling in reverse-engineering；And pass through
It is complex-curved under initial measurement reverse deformation state, cross-section planning then is carried out to profile face in reality, is effectively prevented
Inaccurate problem is measured caused by being deformed due to curved surface in first measurement, measurement error is greatly reduced, improves Modeling precision.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the present invention
Example without creative efforts, can also be implemented for those of ordinary skill in the art according to the present invention
The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is the flow chart of the measurement method in profile face in antenna house provided by one embodiment of the present invention；
Fig. 2 is the illustraton of model in profile face in antenna house provided by one embodiment of the present invention；And
Fig. 3 is the structural schematic diagram of the measuring device in profile face in antenna house provided by one embodiment of the present invention.
Specific implementation mode
For make present invention solves the technical problem that, the technical solution that uses and the technique effect that reaches it is clearer, below
The technical solution of the embodiment of the present invention will be described in further detail in conjunction with attached drawing, it is clear that described embodiment is only
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those skilled in the art exist
The every other embodiment obtained under the premise of creative work is not made, shall fall within the protection scope of the present invention.
Technical solution to further illustrate the present invention below with reference to the accompanying drawings and specific embodiments.
By the description of above-mentioned background technology it is found that antenna house curved surface is complex-curved, parallel cross-section measurement side is being used
During method measures, due to actual processing error, directly measured according to truncated planar survey line, it is difficult to accurately control
Measurement point processed is in a section.And deformation and the mismachining tolerance of curved surface, directly resulting in gauge head cannot be touched according to cross-section
It surveys, therefore reconstruction model is caused to generate larger error with actual processing model, influence antenna house and further finish.It is how accurate
Profile face becomes the precision machined key factor of antenna house in antenna house under true measurement deformation state.
In order to accurately realize that the cross-section of profile surface in antenna house measures, the error that path planning is brought is reduced, the present invention
People innovatively proposes a kind of measurement method in profile face in antenna house, initial by being carried out to the practical curved surface of antenna house Internal periphery
It measures, the section line for then seeking reverse is measuring route line, is finally sweared for measurement point and method by measuring route line is discrete, finally
It is measured, can be avoided because measurement error caused by mismachining tolerance and deformation, is reacted according to measurement point and method arrow
Measurement point under actual deformed state, reconfigurable antenna cover high-precision model.
Embodiment 1
As shown in Figure 1, for the flow chart of the measurement method in profile face in antenna house provided by one embodiment of the present invention, it should
Method includes the following steps：
Step S11, under the rectangular coordinate system of antenna house theoretical model, the Z in antenna house central axis direction, i.e. Fig. 2
Axis direction, several initial cross-section line H of vertical equidistant partition on the interior profile face of antenna house theoretical modeliIt (is only shown in Fig. 2
One Hi)；
Step S12, initial measurement line is determined：Ensureing initial cross-section line HiUnder the premise of vertical with Z axis, with section Zi=
Hi+ δ and Zi=Hi-δ(δ>0) intersection is sought with profile face in the antenna house theory to be measured, obtains two initial measurement line Hi1With
Hi2, as shown in Figure 2；
Wherein, δ is the tolerance more than 0, it is contemplated that computational accuracy and measurement efficiency, generally no greater than 1mm.
Step S13, according to initial measurement line Hi1The discrete initial measurement line H of curvaturei1, so that it is determined that being surveyed corresponding to initial
Measure line Hi1Measurement point and the measurement point normal vector, and according to initial measurement line Hi2The discrete initial measurement line H of curvaturei2,
So that it is determined that corresponding to initial measurement line Hi2Measurement point and the measurement point normal vector；
In this step, the methods of equidistant discrete method may be used or wait arc length discrete method to initial measurement line Hi1With
Hi2It carries out discrete；Due to also can determine whether measurement point in subsequent step, for the ease of distinguishing the measurement that will be determined in this step
Point is known as the first measurement point.
It is most simple and practicable measurement method using equidistant measurement, but in order to ensure when being measured to free form surface
Accuracy of measurement, with regard to necessary contract measurement spacing, this makes measurement efficiency significantly reduce, and increases the works such as follow-up error evaluation
The difficulty of work.The present embodiment, which proposes, makes the density of measurement point distribution change with curvature of curved surface, and curvature is bigger, and measurement point is got over
It is close；Conversely, curvature is bigger, measurement point is thinner, to preferably reflect the geometry information in interior profile face to be measured.
Wherein, in relative antenna cover for profile face, the big region of curvature of curved surface changes violent region, to ensure to survey
Accuracy of measurement, when measurement, should make measurement point intensive as possible.
According to the characteristics of free form surface and requirement that measurement point distribution density changes with curvature of curved surface, feelings are measured in conjunction with practical
Condition will be divided into the section line of m segments, make first when profile face is measured using section line in antenna house on antenna house section line
It is approximately one section of circular curve per a bit of section line to obtain wherein；Then using equidistant on every a bit of approximate circular curve
Method obtains sampled measurements point.Then the total measurement points N of section line and the relationship of curvature ρ can be indicated with formula (1)：
Wherein, K and m is constant more than 0, and K is related with specific measuring apparatus and practical surface machining accuracy, m according to
Curvature of curve and change, it is bigger that curvature of curve changes bigger m, otherwise m is smaller.L is to measure section line length, and ρ is approximate circular arc
Bent curvature of a curve, D are the sampled measurements points that every section of circular curve is obtained using equidistant method.
Step S14, profile face in antenna house theory is carried out with discrete the first obtained measurement point in previous step respectively
It measures, obtains the measurement data of the first measurement point, i.e. coordinate data；
Step S15, it is based on the first measurement point and two measurement section line H ' is constructed using nurbs curve approximating methodi1With
H′i2, and measure section line H ' based on twoi1With H 'i2In Zi=Hi+ δ and Zi=Hi-δ(δ>0) it is constructed between initial
Interior profile face Si；
Here initial interior profile face indicates the type face obtained after measurement antenna house, and reaction is to measure antenna to look for interior profile
The deformation surface obtained behind face, and theoretical model curved surface have deviation.
In this step, it can also be measured using Bezier curve approximating method, B-Spline curve-fitting methods to construct
Section line.It is preferable that using nurbs curve approximating method, nurbs curve is in addition to the advantages of possessing them, due to control
The addition on vertex and weight factor has better controlling to curve.Thus, behaviour is also mainly passed through to the adjustment and modification of its shape
Control vertex and modification weight factor are indulged to realize.
Step S16, with Zi=HiTo the antenna house of construction initially in profile face SiIt is intercepted, accessed section line
As measuring route line；
Step S17, it according to measuring route curvature of a curve and discrete length measuring route line, determines the second measurement point and calculates
The normal vector of second measurement point；
Step S18, in previous step determine the second measurement point and normal vector to antenna house initially in profile face Si
It measures, obtains the coordinate data of the second measurement point；
Step S19, the coordinate data that the second measurement point is fitted using nurbs curve approximating method obtains interior profile face section
Line, to obtain profile face CAD model in antenna house.
The measurement method in profile face in antenna house provided in an embodiment of the present invention is practical by initial measurement reverse antenna house
Interior profile face, the section line for then seeking profile face in antenna house reality is measuring route line, finally that measuring route line is discrete
It is sweared for measurement point and method, final measuring machine measures antenna house according to measurement point and method arrow.The measurement method ensure that survey
Requirement of the data on the same cutting plane is measured, is easy to carry out solid modelling in reverse-engineering；And it is anti-by initial measurement
Ask complex-curved under deformation state, then to practical curved surface carry out cross-section planning, effectively prevent for the first time measure in due to
Inaccurate problem is measured caused by curved surface deformation, measurement error is greatly reduced, improves Modeling precision.
Embodiment 2
The measurement method in profile face in antenna house provided by the invention is illustrated with a specific embodiment below.It should
Method includes the following steps：
Step S21, antenna house central axis direction is asserted Z-direction, in antenna house theory CAD model upper edge Z axis side
To 10 section line H of vertical equidistant partitioni(i=0,1,2 ... 9)；
Step S22, respectively with section Zi=Hi+ 0.5mm and Zi=Hi- 0.5mm (i=0,1,2 ..., 9) and to be measured
Intersection is sought in profile face in antenna house theory, for each section line Hi, all corresponding to obtain two initial measurement line Hi1And Hi2；
Step S23, according to initial measurement line Hi1The discrete initial measurement line H of curvaturei1, so that it is determined that being surveyed corresponding to initial
Measure line Hi1The first measurement point and the first measurement point normal vector, and according to initial measurement line Hi2The discrete initial survey of curvature
Measure line Hi2, so that it is determined that corresponding to initial measurement line Hi2The first measurement point and the first measurement point normal vector；
Step S24, profile face in antenna house theory is carried out with discrete the first obtained measurement point in previous step respectively
It measures, obtains the measurement data of the first measurement point, i.e. coordinate data；
Step S25, it is based on the first measurement point, constructing two using nurbs curve approximating method measures section line H 'i1With
H′i2, and measure section line H ' based on this twoi1With H 'i2In Zi=Hi+ 0.5mm and Zi=Hi- 0.5mm (i=0,1,2 ...,
9) initial lubrication groove profile face S is constructed betweeni(i=0,1,2 ..., 9)；
Step S26, with Zi=Hi(i=0,1,2...9) the initial interior profile face S of interception constructioni(i=0,1,2 ..., 9)
Obtain section line, as measuring route line Hi″；
Step S27, according to measuring route line Hi" curvature and discrete length measuring route line Hi", obtain the second measurement
The normal vector of point and the second measurement point；
Step S28, with the second measurement point and normal vector to antenna house initially in profile face SiIt measures, obtains second
The coordinate data of measurement point；
Step S29, the coordinate data that the second measurement point is fitted using nurbs curve obtains interior profile face section line, to
Obtain profile face CAD model in antenna house.
Embodiment 3
As shown in figure 3, the structure of the measuring device in profile face is shown in the antenna house provided for another embodiment of the present invention
It is intended to, which includes：Initial cross-section line division module 10, initial measurement line determining module 20, the first discrete block 30,
First measurement module 40, interior profile surface construction module 50, measuring route line determining module 60, the second discrete block 70, second are surveyed
Measure module 80 and interior profile surface model determining module 90.
In conjunction with the embodiments 1 and embodiment 2 description, specifically, initial cross-section line division module 10 be used for along antenna house
Central axis direction, vertical several initial cross-section line H of equidistant partition on the theoretical model curved surface of antenna housei；Initial measurement
Line determining module 20, for for each initial cross-section line Hi, with section Zi=Hi+ δ and Zi=HiThe theory of-δ and antenna house
Intersection is sought in interior profile face, obtains two initial measurement line Hi1And Hi2, wherein δ>0；First discrete block 30 is used for according to each first
Begin to measure line Hi1The discrete initial measurement line H of curvaturei1, and according to each initial measurement line Hi2The discrete initial measurement line H of curvaturei2,
It obtains corresponding to initial measurement line Hi1And Hi2The first measurement point and the first measurement point normal vector；First measurement module 40
For being measured respectively to profile face in theory with the first measurement point, the coordinate data of the first measurement point is obtained；Interior profile face
Constructing module 50 constructs two for the coordinate data based on the first measurement point and measures section line H 'i1With H 'i2, and it is based on two
Measure section line H 'i1With H 'i2In Zi=Hi+ δ and Zi=Hi-δ(δ>0) profile face S in initial is constructed betweeni；It measures
Path-line determining module 60 is used for Zi=HiTo initial interior profile face SiIt is intercepted, using accessed section line as survey
Measure path-line；Second discrete block 70 is used to, according to measuring route curvature of a curve and discrete length measuring route line, determine second
Measurement point and the normal vector for calculating the second measurement point；Second measurement module 80 is used for the second measurement point and its normal vector
To initial interior profile face SiIt measures, obtains the coordinate data of the second measurement point；Interior profile surface model determining module 90 is used for
The coordinate data of second measurement point is fitted, the interior profile surface model of antenna house is obtained.
Above example provide technical solution in all or part of content can be realized by software programming, software
Program is stored in the storage medium that can be read, and storage medium is for example：Hard disk, CD in computer or floppy disk.
Note that above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The present invention is not limited to specific embodiments described here, can carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out to the present invention by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
May include other more equivalent embodiments, and the scope of the present invention is determined by scope of the appended claims.
Claims (10)
1. the measurement method in profile face in a kind of antenna house, which is characterized in that including：
Step S11, along the central axis direction of the antenna house, the vertical equidistant partition on the theoretical model curved surface of the antenna house
Several initial cross-section line Hi；
Step S12, for initial cross-section line H described in eachi, with section Zi=Hi+ δ and Zi=HiThe reason of-δ and the antenna house
Intersection is sought by interior profile face, obtains two initial measurement line Hi1And Hi2, wherein 0 ＜ δ≤1mm, δ is tolerance；
Step S13, according to each initial measurement line Hi1The discrete initial measurement line H of curvaturei1, and according to each described initial
Measure line Hi2The discrete initial measurement line H of curvaturei2, obtain corresponding to the initial measurement line Hi1And Hi2Several
The normal vector of one measurement point and each first measurement point；
Step S14, profile face in the theory is measured with first measurement point respectively, obtains each described first and measures
The coordinate data of point；
Step S15, the coordinate data based on first measurement point constructs two and measures section line H 'i1With H 'i2, and it is based on two
The measurement section line H 'i1With H 'i2In Zi=Hi+ δ and Zi=HiProfile face in initial is constructed between-δ；
Step S16, with Zi=HiThe initial interior profile face is intercepted, using accessed section line as measuring route
Line；
Step S17, according to measuring route line described in the measuring route curvature of a curve and discrete length, several the second surveys are determined
Amount point and the normal vector for calculating each second measurement point；
Step S18, with second measurement point and its normal vector to it is described it is initial in profile face measure, obtain described the
The coordinate data of two measurement points；And
Step S19, the coordinate data of second measurement point is fitted, obtains the interior profile surface model of the antenna house.
2. the measurement method in profile face in antenna house as described in claim 1, which is characterized in that used in the step S13
Equidistant discrete method waits arc length discrete method to the initial measurement line Hi1And Hi2It carries out discrete.
3. the measurement method in profile face in antenna house as described in claim 1, which is characterized in that used in the step S15
Nurbs curve approximating method constructs the measurement section line H 'i1With H 'i2。
4. the measurement method in profile face in antenna house as described in claim 1, which is characterized in that used in the step S15
Bezier curve approximating method or B-Spline curve-fitting methods construct the measurement section line H 'i1With H 'i2。
5. the measurement method in profile face in antenna house as described in claim 1, which is characterized in that used in the step S19
Nurbs curve approximating method is fitted the coordinate data of second measurement point.
6. the measuring device in profile face in a kind of antenna house, which is characterized in that including：
Initial cross-section line division module, it is bent in the theoretical model of the antenna house for the central axis direction along the antenna house
Several initial cross-section line H of vertical equidistant partition on facei；
Initial measurement line determining module, for for initial cross-section line H described in eachi, with section Zi=Hi+ δ and Zi=Hi-δ
Intersection is sought with profile face in the theory of the antenna house, obtains two initial measurement line Hi1And Hi2, wherein 0 ＜ δ≤1mm, δ be
Tolerance；
First discrete block, for according to each initial measurement line Hi1The discrete initial measurement line H of curvaturei1, and according to
Each initial measurement line Hi2The discrete initial measurement line H of curvaturei2, obtain corresponding to the initial measurement line Hi1And Hi2
Several first measurement points and each first measurement point normal vector；
First measurement module obtains each institute for being measured respectively to profile face in the theory with first measurement point
State the coordinate data of the first measurement point；
Interior profile surface construction module constructs two for the coordinate data based on first measurement point and measures section line H 'i1With
H′i2, and it is based on two measurement section line H 'i1With H 'i2In Zi=Hi+ δ and Zi=HiIt is constructed between-δ initial
Interior profile face；
Measuring route line determining module, for Zi=HiThe initial interior profile face is intercepted, by accessed section
Line is as measuring route line；
Second discrete block is used for according to measuring route line described in the measuring route curvature of a curve and discrete length, if determining
Dry the second measurement point and the normal vector for calculating second measurement point；
Second measurement module, for being measured to the initial interior profile face with second measurement point and its normal vector,
Obtain the coordinate data of second measurement point；And
Interior profile surface model determining module is fitted for the coordinate data to second measurement point, obtains the antenna
The interior profile surface model of cover.
7. the measuring device in profile face in antenna house as claimed in claim 6, which is characterized in that first discrete block is adopted
With equidistant discrete method or wait arc length discrete method to the initial measurement line Hi1And Hi2It carries out discrete.
8. the measuring device in profile face in antenna house as claimed in claim 6, which is characterized in that the interior profile surface construction mould
Block constructs the measurement section line H ' using nurbs curve approximating methodi1With H 'i2。
9. the measuring device in profile face in antenna house as claimed in claim 6, which is characterized in that the interior profile surface construction mould
Block constructs the measurement section line H ' using Bezier curve approximating method or B-Spline curve-fitting methodsi1With H 'i2。
10. the measuring device in profile face in antenna house as claimed in claim 6, which is characterized in that the interior profile surface model
Determining module is fitted the coordinate data of each second measurement point using nurbs curve approximating method.
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