CN114018174A - Complex curved surface profile measuring system - Google Patents
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- CN114018174A CN114018174A CN202111307797.6A CN202111307797A CN114018174A CN 114018174 A CN114018174 A CN 114018174A CN 202111307797 A CN202111307797 A CN 202111307797A CN 114018174 A CN114018174 A CN 114018174A
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
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Abstract
According to the complex curved surface profile measuring system, the coordinate system of the laser collecting system and the coordinate system of the complex curved surface to be measured are unified through the laser collecting system covering a visual angle range, the rotatable rotary table, the moving mechanism capable of enabling the rotary table to move along the Y axis and the moving mechanism capable of enabling the laser collecting system to move along the Z axis, one or more of the rotary table, the first moving mechanism and the second moving mechanism is controlled by the controller to perform corresponding compensation movement, automatic three-dimensional profile measurement of the complex curved surface is achieved, and measuring efficiency and measuring accuracy are guaranteed.
Description
Technical Field
The invention relates to the field of profile measurement, in particular to a complex curved surface profile measurement system.
Background
At the present stage, the contour measurement of the finished complex curved surface is often difficult due to the irregularity of the curved surface. The existing different measurement means can not meet the measurement requirement on the machined complex curved surface in the industrial production process. The three-coordinate measuring machine can meet the requirement on the measuring precision, but because only one point can be sampled at a time, the rapid measurement is difficult to realize, and the requirement on the measuring speed cannot be met. The non-contact measurement method based on structured light and the like can realize rapid measurement, but the problem that the measurement precision at the large-curvature part of the complex curved surface is difficult to reach below 10 mu m in the aspect of measurement precision is faced, and the measurement precision requirement of the complex curved surface cannot be met.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention provides a complex curved surface profile measuring system, which is used to solve the problems in the prior art that the requirements of measuring accuracy and measuring speed of the processed complex curved surface in the industrial production process cannot be met.
To achieve the above and other related objects, the present invention provides a complex curved surface profile measuring system, comprising: the system comprises: the rotary table is used for driving the complex curved surface to be tested to rotate by taking the Z axis under the system coordinate system as a center; the horizontal reference surface of the complex curved surface to be detected is vertical to the Z axis; the first movement mechanism is used for driving the rotary table fixed on the first movement mechanism to move along the Y-axis direction under the system coordinate system; the laser acquisition system covers a visual angle range, and a laser surface of the laser acquisition system is vertical to the Z axis and is used for acquiring the profile data of the complex curved surface to be detected; the second movement mechanism is used for driving the laser acquisition system fixed on the second movement mechanism to move along the Z-axis direction; and the controller is connected with the rotary table, the first movement mechanism and the second movement mechanism and is used for controlling one or more of the rotary table, the first movement mechanism and the second movement mechanism to perform corresponding compensation movement so that the laser acquisition system can acquire profile data for acquiring the overall profile of the complex curved surface to be detected.
In an embodiment of the present invention, the laser collecting system includes: the laser plane is located at least three laser sensors of the same plane, and covers a visual angle range altogether.
In an embodiment of the present invention, the laser collecting system includes: the at least two local laser sensors are used for acquiring the profile data of the local detail area of the complex curved surface to be detected; the global laser sensor is used for acquiring the profile data of the region of the complex curved surface to be detected except the local detail region; the laser planes of the local laser sensors and the global laser sensor are in the same plane and cover a visual angle range.
In an embodiment of the present invention, the system further includes: and the curved surface fixing device is arranged on the rotary table and used for fixing the complex curved surface to be detected on the rotary table so that the horizontal reference surface of the complex curved surface to be detected is kept vertical to the Z axis.
In an embodiment of the present invention, the controller includes: the data acquisition module is used for acquiring the height position of the horizontal reference surface of the complex curved surface to be detected, the current Y-axis position of the rotary table and the view angle range; and the control module is connected with the data acquisition module and is used for controlling one or more of the rotary table, the first movement mechanism and the second movement mechanism to perform corresponding compensation movement according to the height position of the horizontal reference surface of the complex curved surface to be detected, the current Y-axis position of the rotary table and the view angle range, so that the laser acquisition system can acquire profile data for acquiring the overall profile of the complex curved surface to be detected.
In an embodiment of the present invention, the control module includes: the Y-axis compensation motion control unit is used for determining an optimal measurement position within a visual angle range covered by the laser acquisition system and controlling the first motion mechanism to drive the rotary table to move to the optimal measurement position from the current Y-axis position along the Y-axis direction; the Z-axis compensation motion control unit is used for determining the position of a detection height limit value according to the size information of the complex curved surface to be detected and controlling the second motion mechanism to drive the laser acquisition system to move from the position of the height value corresponding to the horizontal reference surface to the position of the detection height limit value along the Z-axis direction; and the compensation rotation control unit is used for determining the uncovered visual angle range according to the visual angle range and controlling the rotary table to rotate for one or more times so that the laser acquisition system can cover the uncovered visual angle range.
In an embodiment of the present invention, the first movement mechanism is provided with a grating scale for determining a current Y-axis position of the turntable; and/or the second movement mechanism is provided with a grating ruler used for determining the reference height position corresponding to the horizontal reference surface and the current height value position of the laser acquisition system.
In an embodiment of the present invention, the system further includes: and the data processing device is connected with the laser acquisition system and is used for splicing and preprocessing the profile data acquired by the laser acquisition system to obtain the overall profile of the complex curved surface to be detected.
In one embodiment of the present invention, each laser is disposed within 180 degrees of the plane.
In an embodiment of the invention, the local laser sensors are disposed adjacently.
As described above, the present invention is a complex curved surface profile measurement system, which has the following beneficial effects: according to the invention, through the laser acquisition system covering a visual angle range, the rotatable rotary table, the movement mechanism capable of allowing the rotary table to move along the Y axis and the movement mechanism capable of allowing the laser acquisition system to move along the Z axis, the unification of a coordinate system of the laser acquisition system and a coordinate system of the complex curved surface to be detected is realized, and one or more of the rotary table, the first movement mechanism and the second movement mechanism are controlled by the controller to perform corresponding compensation movement, so that the automatic measurement of the whole three-dimensional profile of the complex curved surface is realized, and the measurement efficiency and the measurement precision are ensured.
Drawings
Fig. 1 is a schematic structural diagram of a complex curved surface profile measurement system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a laser collecting system according to an embodiment of the invention.
Fig. 3 is a schematic diagram of a laser collecting system according to an embodiment of the invention.
Fig. 4 is a schematic diagram illustrating determination of an optimal detection position according to an embodiment of the invention.
Fig. 5 is a schematic view illustrating coverage of a viewing angle range according to an embodiment of the invention.
FIG. 6 is a schematic structural diagram of a blade profile measurement system based on multiple laser sensors according to an embodiment of the present invention.
Fig. 7 is a schematic diagram illustrating determination of an optimal detection position according to an embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict.
It is noted that in the following description, reference is made to the accompanying drawings which illustrate several embodiments of the present invention. It is to be understood that other embodiments may be utilized and that mechanical, structural, electrical, and operational changes may be made without departing from the spirit and scope of the present invention. The following detailed description is not to be taken in a limiting sense, and the scope of embodiments of the present invention is defined only by the claims of the issued patent. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Spatially relative terms, such as "upper," "lower," "left," "right," "lower," "below," "lower," "over," "upper," and the like, may be used herein to facilitate describing one element or feature's relationship to another element or feature as illustrated in the figures.
Throughout the specification, when a part is referred to as being "connected" to another part, this includes not only a case of being "directly connected" but also a case of being "indirectly connected" with another element interposed therebetween. In addition, when a certain part is referred to as "including" a certain component, unless otherwise stated, other components are not excluded, but it means that other components may be included.
The terms first, second, third, etc. are used herein to describe various elements, components, regions, layers and/or sections, but are not limited thereto. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the scope of the present invention.
Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," and/or "comprising," when used in this specification, specify the presence of stated features, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, operations, elements, components, items, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions or operations are inherently mutually exclusive in some way.
The invention provides a complex curved surface contour measuring system, which realizes the unification of a laser acquisition system coordinate system and a complex curved surface coordinate system to be measured by a laser acquisition system covering a visual angle range, a rotatable rotary table, a motion mechanism for enabling the rotary table to move along a Y axis and a motion mechanism for enabling the laser acquisition system to move along a Z axis, controls one or more of the rotary table, a first motion mechanism and a second motion mechanism to perform corresponding compensation motion by a controller, realizes the automatic three-dimensional contour measurement of the complex curved surface whole body, and ensures the measuring efficiency and the measuring precision.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can easily implement the embodiments of the present invention. The present invention may be embodied in many different forms and is not limited to the embodiments described herein.
Fig. 1 shows a schematic structural diagram of a complex curved surface profile measurement system in an embodiment of the present invention.
The system corresponds to a system coordinate system comprising: the X axis, the Y axis and the Z axis are mutually perpendicular.
The system comprises:
the rotary table 11 is used for driving the complex curved surface 10 to be tested to rotate by taking the Z axis under the system coordinate system as a center; wherein, the horizontal reference plane of the complex curved surface 10 to be measured is vertical to the Z axis;
the first movement mechanism 12 is used for driving the rotary table 11 fixed on the first movement mechanism to move along the Y-axis direction under the system coordinate system; preferably, a moving track extending along the Y axis is arranged on the first moving mechanism, the turntable is arranged on the moving track, and the first moving mechanism is used for driving the turntable to move along the Y axis;
the laser acquisition system 13 covers a visual angle range, and a laser surface of the laser acquisition system is vertical to the Z axis and is used for acquiring the profile data of the complex curved surface to be detected;
the second movement mechanism 14 is used for driving the laser acquisition system 13 fixed on the second movement mechanism to move along the Z-axis direction; preferably, a moving track extending along the Z axis is arranged on the second moving mechanism, the laser collecting system 13 is arranged on the moving track, and the second moving mechanism is used for driving the laser collecting system 13 to move along the Z axis direction;
and the controller is connected with the rotary table 11, the first movement mechanism 12 and the second movement mechanism 14 and is used for controlling one or more of the rotary table 11, the first movement mechanism 12 and the second movement mechanism 14 to perform corresponding compensation movement so that the laser acquisition system 13 acquires profile data for acquiring the overall profile of the complex curved surface to be detected. It should be noted that the controller in fig. 1 is disposed in the control cabinet, but the location of the controller is not limited to fig. 1, and the present invention is not limited thereto.
Optionally, the laser collecting system 13 includes: the laser surface is positioned on at least three laser sensors of the same plane and covers a visual angle range; each laser sensor is sequentially arranged on the first movement mechanism; preferably, each laser is arranged within 180 degrees of the plane, and covers a viewing angle range of 180 degrees or more. A schematic of a three sensor arrangement is shown in figure 2.
It should be noted that before the profile measurement, the calibration of the error of the motion mechanism is required, and the unification of the coordinate systems of the laser sensors and the coordinate system of the measured three-dimensional complex curved surface is realized by a calibration method, that is, the laser surfaces of the laser sensors are adjusted to be in the same plane and perpendicular to the Z axis corresponding to the second motion mechanism, so as to ensure the unification of the coordinate systems.
Optionally, because the complex curved surface generally has a relative local detailed area and needs to pay attention, the characteristics of the area can not be described in detail only by global acquisition, which causes inaccurate profile calculation of the complex curved surface to be measured; the laser acquisition system 13 thus comprises:
the at least two local laser sensors are used for acquiring the profile data of the local detail area of the complex curved surface to be detected; the laser angles of the two local laser sensors face the local detail area of the complex curved surface to be detected, so that more comprehensive profile data acquisition of the local detail area can be realized, and a more accurate profile can be obtained. It should be noted that the size and shape of the local detail area are different from those of the complex curved surfaces with different sizes, and if the range of the local detail area of the to-be-complex curved surface is large, the local laser sensor needs to be added, and if the range is small, only two local sensors need to be adopted. Preferably, the local laser sensors are arranged adjacently. Preferably, the local laser sensors are arranged equidistantly and/or symmetrically, so that complete acquisition of the profile data of the local detail area is ensured. For example, as shown in fig. 3, the local detail area is an intersection area of two blades, and the central viewing angles of the two local sensors are vertically arranged, so as to ensure complete acquisition of the profile data of the local detail area.
The global laser sensor is used for acquiring the profile data of the region of the complex curved surface to be detected except the local detail region;
the laser planes of the local laser sensors and the global laser sensor are in the same plane and cover a visual angle range.
Optionally, the system further includes: the curved surface fixing device 15 is a complex curved surface part quick fixing device, is arranged on the rotary table, and is used for fixing the complex curved surface to be detected on the rotary table so that a horizontal reference surface of the complex curved surface to be detected can be kept perpendicular to the Z axis. For example, the curved surface fixture is a clamp device.
After the complex curved surface to be detected is fixed by the curved surface fixing device 15, the horizontal reference surface of the complex curved surface to be detected is kept vertical to the Z axis, and then the horizontal reference surface of the complex curved surface to be detected needs to be calibrated; the reference surface is calibrated by the laser acquisition system 13, and can be realized by a series of standard measuring tools (such as a feeler gauge, a cylinder, a sphere, a cone and the like), for example, the long side and the short side of the feeler gauge are measured at different angles after the feeler gauge is fixed, data of the laser acquisition system are acquired, and the included angle between the coordinate systems of different sensors can be obtained by performing linear fitting on the data of the laser acquisition system; acquiring data after fixing the cylinder, and calculating the circle center position under different coordinate systems through circle fitting so as to obtain the X-direction offset and the Y-direction offset on the X-Y plane of different sensor coordinate systems in the laser acquisition system; and fixing the round ball, acquiring data, and calculating the radius of the circle under different sensor coordinate systems in the laser acquisition system through circle fitting to obtain the Z-direction offset of the different sensor coordinate systems in the laser acquisition system.
Optionally, the controller includes:
the data acquisition module is used for acquiring the height position of the horizontal reference surface of the complex curved surface to be detected, the current Y-axis position of the rotary table 11 and the view angle range; specifically, because the horizontal reference surface of the complex curved surface to be measured is calibrated, the height position of the calibrated horizontal reference surface along the Z axis is obtained; the current Y-axis position of the turntable 11 is obtained and the viewing angle range is obtained, where the viewing angle range corresponds to a viewing angle, such as 180 degrees.
And the control module is connected with the data acquisition module and is used for controlling one or more of the rotary table 11, the first movement mechanism 12 and the second movement mechanism 14 to perform corresponding compensation movement according to the height position of the horizontal reference plane of the complex curved surface to be detected, the current Y-axis position of the rotary table 11 and the view angle range, so that the laser acquisition system 13 can acquire profile data for acquiring the overall profile of the complex curved surface to be detected.
Optionally, the control module includes:
the Y-axis compensation motion control unit is used for determining an optimal measurement position within a visual angle range covered by the laser acquisition system and controlling the first motion mechanism to drive the rotary table to move to the optimal measurement position from the current Y-axis position along the Y-axis direction; specifically, the optimal measurement position is determined by the view angle range covered by the laser acquisition system, for example, as shown in fig. 4, since the view angle range corresponds to a 180-degree plane semicircle and the diameter center origin a is selected as the optimal measurement position, the center of the circle of the turntable is moved from the current Y-axis position to the optimal measurement position a along the Y-axis direction.
The Z-axis compensation motion control unit is used for determining the position of a detection height limit value according to the size information of the complex curved surface to be detected and controlling the second motion mechanism to drive the laser acquisition system to move from the position of the height value corresponding to the horizontal reference surface to the position of the detection height limit value along the Z-axis direction; specifically, since the height position of the horizontal reference surface is determined, the highest position of the complex curved surface to be detected is determined according to the size information of the complex curved surface to be detected and is used as the position of the detection height limit value, the second movement mechanism drives the laser acquisition system to move from the position of the height value corresponding to the horizontal reference surface to the position of the detection height limit value along the Z-axis direction, and acquisition of the contour of the complex curved surface to be detected in the Z-direction is achieved.
And the compensation rotation control unit is used for determining the uncovered visual angle range according to the visual angle range and controlling the rotary table to rotate for one or more times so that the laser acquisition system can cover the uncovered visual angle range. Because the view angle range corresponds to a view angle and the view angle can be determined, the uncovered view angle range of the current laser acquisition system can be obtained by subtracting the view angle from 360 degrees, and then the rotary table is controlled to rotate so that the laser acquisition system can cover the uncovered view angle range to acquire the profile data of the overall profile of the complex curved surface to be detected. For example, as shown in fig. 5, when the view angle corresponding to the view angle range covered by the current laser collecting system is 180 degrees, and the view angle corresponding to the uncovered view angle range is 180 degrees, the turntable is controlled to rotate 180 degrees, so that the laser collecting system covers the uncovered view angle range. Generally speaking, the maximum visual angle covered by three laser sensors is limited and cannot be related to a range of 360 degrees, so that the full visual angle range can be covered only by the three laser sensors by only automatically adjusting the rotation of the rotary table, and compared with the prior art in which the full visual angle range is covered by adding sensors, the cost can be reduced and the efficiency of collecting contour data can be ensured.
The Z-axis compensation motion control unit controls the second motion mechanism to drive the laser acquisition system to move along the Z-axis direction, so that acquisition of the profile of the complex curved surface to be detected in the Z direction can be realized, and the full-view-angle range can be covered only by three laser sensors by automatically adjusting the rotation of the rotary table through the compensation rotation control unit, so that the profile data acquisition of the overall profile of the complex curved surface to be detected can be realized.
Optionally, the system further includes: and the data processing device is connected with the laser acquisition system and is used for splicing and preprocessing the profile data acquired by the laser acquisition system to obtain the overall profile of the complex curved surface to be detected. Specifically, because the laser surfaces of the laser sensors are positioned on the same plane, the acquired corresponding profile data which are corresponding to the laser surfaces and are high in Z-axis height value can be spliced directly and preprocessed, so that the overall profile of the complex curved surface to be detected can be obtained, the profile reduction efficiency is greatly improved, and the accurate accuracy is ensured.
Optionally, the first movement mechanism is provided with a grating scale 16 for determining the current Y-axis position of the turntable; and/or the second motion mechanism is provided with a grating ruler 17 used for determining the reference height position corresponding to the horizontal reference surface and the current height value position of the laser acquisition system.
In order to better describe the complex curved surface profile measurement system, a specific embodiment is provided;
example 1: a blade profile measurement system based on multiple laser sensors. FIG. 6 is a schematic diagram of a blade profile measurement system.
The system comprises:
the marble platform 2 is provided with a Y-axis movement mechanism 3, a profile sensor 4, a profile sensor 5, a Z-axis movement mechanism 7 arranged on a marble upright post 6, a Z-axis grating ruler 8, a profile sensor 9, a profile sensor 10, a measured blade 11, a quick clamping mechanism 12, a precision rotary table 13 and a Y-axis grating ruler 14; and the controller is arranged on the control cabinet 1.
The profile measuring sensors 4, 5, 9 and 10 are distributed in the same plane according to a certain angle and are used for simultaneously acquiring section profile data; a precision rotary table 13 and a Y-axis movement mechanism 3 and a Z-axis movement mechanism 7 with grating rulers (14,8) are used for generating three-axis relative movement between the blade to be measured and the multi-laser sensor; the system software is used to control the acquisition of the motion mechanism and sensor data. The blade to be measured can rotate with the rotary table 13. The turn table 13 moves on the Y-axis movement mechanism 3. Four profile measuring sensors 4, 5, 9, 10 are mounted on the Z-axis movement mechanism 7 and can move in the Z-direction. A series of standard measuring tools are used for realizing geometric error compensation of the motion process of the motion mechanism and the rotary table and calibration and unification of the coordinate system of the motion mechanism and the rotary table to the coordinate system of the multi-contour measuring sensor. The profile measuring sensors 4, 5, 9 and 10 are all linear laser measuring instruments, and can collect a large number of data points at one time.
The specific measurement steps are as follows:
(1) blade fixation and datum plane determination
Before measurement, the measuring device is fixed on a rotary table 13 by a special quick clamping mechanism 12, and a reference surface of the measuring device is calibrated by a profile measuring sensor. The rapid clamping mechanism can be tightly occluded with the tenon of the blade, and stability in the blade measuring process is guaranteed. The reference surface is determined by means of a profile measuring sensor, and when the profile measuring sensors I-IV just acquire the profile of the quick clamping mechanism 12 along with the Z-axis movement, the indication number of the Z-axis grating ruler 8 at the moment is taken as the reference.
(2) Adaptive measurement of blades
The cross sections of the blade at different heights based on the reference surface can be measured by selecting different Z values in software. During cross section measurement, the controller adjusts the rotation angle of the precision rotary table 13 and the Y-axis movement mechanism 3 according to the distribution of data points acquired by the profile measurement sensors I-IV on the sensor coordinate system to change the position and orientation angle of the blade, and finally, in each sensor coordinate system, the blade profile data is in the optimal position in the profile measurement sensor cooperation measurement area shown in FIG. 7.
The measuring system can be used in a workshop field, and further can measure under strict environments such as constant temperature and constant humidity.
In summary, the complex curved surface profile measurement system of the present invention realizes unification of the coordinate system of the laser collection system and the coordinate system of the complex curved surface to be measured by the laser collection system covering a view angle range, the rotatable turntable, the movement mechanism for allowing the turntable to move along the Y axis, and the movement mechanism for allowing the laser collection system to move along the Z axis, and controls one or more of the turntable, the first movement mechanism, and the second movement mechanism to perform corresponding compensation movements by the controller, thereby realizing automatic three-dimensional profile measurement of the complex curved surface as a whole, and ensuring measurement efficiency and measurement accuracy. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles of the present invention and its efficacy, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. A complex curved surface profile measurement system, the system comprising:
the rotary table is used for driving the complex curved surface to be tested to rotate by taking the Z axis under the system coordinate system as a center; the horizontal reference surface of the complex curved surface to be detected is vertical to the Z axis;
the first movement mechanism is used for driving the rotary table fixed on the first movement mechanism to move along the Y-axis direction under the system coordinate system;
the laser acquisition system covers a visual angle range, and a laser surface of the laser acquisition system is vertical to the Z axis and is used for acquiring the profile data of the complex curved surface to be detected;
the second movement mechanism is used for driving the laser acquisition system fixed on the second movement mechanism to move along the Z-axis direction;
and the controller is connected with the rotary table, the first movement mechanism and the second movement mechanism and is used for controlling one or more of the rotary table, the first movement mechanism and the second movement mechanism to perform corresponding compensation movement so that the laser acquisition system can acquire profile data for acquiring the overall profile of the complex curved surface to be detected.
2. The complex curved surface profile measuring system of claim 2, wherein the laser acquisition system comprises: the laser plane is located at least three laser sensors of the same plane, and covers a visual angle range altogether.
3. The complex curved surface profile measuring system of claim 3, wherein the laser acquisition system comprises:
the at least two local laser sensors are used for acquiring the profile data of the local detail area of the complex curved surface to be detected;
the global laser sensor is used for acquiring the profile data of the region of the complex curved surface to be detected except the local detail region;
the laser planes of the local laser sensors and the global laser sensor are in the same plane and cover a visual angle range.
4. The complex surface profile measuring system as defined in claim 1, further comprising: and the curved surface fixing device is arranged on the rotary table and used for fixing the complex curved surface to be detected on the rotary table so that the horizontal reference surface of the complex curved surface to be detected is kept vertical to the Z axis.
5. The complex surface profile measuring system as defined in claim 1, wherein said controller comprises:
the data acquisition module is used for acquiring the height position of the horizontal reference surface of the complex curved surface to be detected, the current Y-axis position of the rotary table and the view angle range;
and the control module is connected with the data acquisition module and is used for controlling one or more of the rotary table, the first movement mechanism and the second movement mechanism to perform corresponding compensation movement according to the height position of the horizontal reference surface of the complex curved surface to be detected, the current Y-axis position of the rotary table and the view angle range, so that the laser acquisition system can acquire profile data for acquiring the overall profile of the complex curved surface to be detected.
6. The complex surface profile measuring system of claim 5, wherein the control module comprises:
the Y-axis compensation motion control unit is used for determining an optimal measurement position within a visual angle range covered by the laser acquisition system and controlling the first motion mechanism to drive the rotary table to move to the optimal measurement position from the current Y-axis position along the Y-axis direction;
the Z-axis compensation motion control unit is used for determining the position of a detection height limit value according to the size information of the complex curved surface to be detected and controlling the second motion mechanism to drive the laser acquisition system to move from the position of the height value corresponding to the horizontal reference surface to the position of the detection height limit value along the Z-axis direction;
and the compensation rotation control unit is used for determining the uncovered visual angle range according to the visual angle range and controlling the rotary table to rotate for one or more times so that the laser acquisition system can cover the uncovered visual angle range.
7. The complex curved surface profile measuring system as claimed in claim 1, wherein the first motion mechanism is provided with a grating scale for determining the current Y-axis position of the turntable; and/or the second movement mechanism is provided with a grating ruler used for determining the reference height position corresponding to the horizontal reference surface and the current height value position of the laser acquisition system.
8. The complex surface profile measuring system as defined in claim 1, further comprising:
and the data processing device is connected with the laser acquisition system and is used for splicing and preprocessing the profile data acquired by the laser acquisition system to obtain the overall profile of the complex curved surface to be detected.
9. A complex curved surface profile measuring system as defined in claim 2 wherein each laser is positioned within 180 degrees of the plane of formation.
10. The complex curved surface profile measuring system of claim 3, wherein the localized laser sensors are positioned adjacent to each other.
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| CN114018174B (en) | 2023-08-22 |
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