CN114543731A - Blade detection method and device - Google Patents
Blade detection method and device Download PDFInfo
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- CN114543731A CN114543731A CN202011337175.3A CN202011337175A CN114543731A CN 114543731 A CN114543731 A CN 114543731A CN 202011337175 A CN202011337175 A CN 202011337175A CN 114543731 A CN114543731 A CN 114543731A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/20—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring contours or curvatures, e.g. determining profile
Abstract
The invention discloses a blade detection method and device, and relates to the field of blade detection acceptance. The method comprises the following steps: acquiring first measurement data of the profile of the blade section based on a contact probe, and acquiring second measurement data of the profile based on a non-contact probe; projecting the first measurement data and the second measurement data on a theoretical section of the blade to respectively obtain first projection data and second projection data; reconstructing the leaf profile according to the first projection data and the second projection data; and evaluating and analyzing the reconstructed blade profile to obtain a blade profile measured value of the blade section. According to the blade section detection method and device, two measurement modes of combining a three-coordinate contact measurement method and an optical non-contact measurement method are adopted, so that the accuracy of blade section detection can be improved. Furthermore, the method can be compared with the blade detection result provided by the supplier to judge whether the blade quality provided by the blade supplier is qualified.
Description
Technical Field
The disclosure relates to the field of blade detection and acceptance, in particular to a blade detection method and device.
Background
The blades of the civil aircraft engine are various in types and shapes, and the manufacturing quality of the blades is directly related to the performance and the service life of the civil aircraft engine. The blade is a typical civil aircraft engine key part with outstanding detection acceptance problems due to the fact that the blade is complex in structural profile, difficult in datum positioning, high in precision requirement, general and unspecific in detection standards in the domestic existing industry, non-uniform in measurement process of each unit, poor in consistency, lack of independent evaluation and analysis software, inconsistent in algorithm of used foreign evaluation and analysis software, unclear in mechanism and the like. The problem of civil aircraft blade detection and acceptance becomes one of the bottlenecks in autonomous research and development of civil aircraft engines in China, and the autonomous research and development process of the civil aircraft engines in China is restricted.
Disclosure of Invention
One technical problem to be solved by the present disclosure is how to improve the accuracy of blade detection.
According to an aspect of the present disclosure, a blade detection method is provided, including: acquiring first measurement data of the profile of the blade section based on a contact probe, and acquiring second measurement data of the profile based on a non-contact probe; projecting the first measurement data and the second measurement data on a theoretical section of the blade to respectively obtain first projection data and second projection data; reconstructing the leaf profile according to the first projection data and the second projection data; and evaluating and analyzing the reconstructed blade profile to obtain a blade profile measured value of the blade section.
In some embodiments, reconstructing the leaf profile comprises: registering the first projection data and the second projection data to obtain third projection data which takes the first projection data as a reference and corresponds to the second projection data; and reconstructing the leaf profile according to the first projection data and the third projection data.
In some embodiments, reconstructing the leaf profile comprises: respectively taking the data of the leaf back area and the leaf basin area in the first projection data as the data of the leaf back area and the leaf basin area of the reconstructed leaf profile; and respectively taking the data of the blade profile leading edge region and the blade profile trailing edge region in the third projection data as the data of the blade profile leading edge region and the blade profile trailing edge region of the reconstructed blade profile.
In some embodiments, obtaining third projection data corresponding to the second projection data with reference to the first projection data comprises: registering at least one of a leaf back region and a leaf basin region of the first projection data with a corresponding region in the second projection data; and determining third projection data by taking data of at least one region in the leaf back region and the leaf basin region in the first projection data as a target point set.
In some embodiments, the blade section is assigned a value based on a profile measurement of the blade section; obtaining cutting surface profile measurement data of a slice cut along the section of the assigned blade; comparing the cutting surface profile measurement data with the reconstructed leaf profile data; and if the comparison result is smaller than the threshold value, determining the blade profile measurement value of the blade section as an accurate value.
In some embodiments, acquiring cut plane profile measurement data for the slice comprises: if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is smaller than a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is larger than the projection profile of the other cutting surface, measuring the profile of the cutting surface of the slice by adopting a backlight method to obtain the profile measurement data of the cutting surface; and if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is larger than or equal to a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is smaller than or equal to the projection profile of the other cutting surface, measuring the profile of the cutting surface of the slice by adopting a top light method, and obtaining the profile measurement data of the cutting surface.
In some embodiments, comparing the cut surface profile measurement data to the reconstructed leaf profile data comprises: and taking the cutting surface profile measurement data as a target point set, registering the cutting surface profile of the slice with the reconstructed leaf profile, and determining the distance between each measurement point in the cutting surface profile measurement data and the corresponding measurement point in the reconstructed leaf profile data.
In some embodiments, the first projection data is projection data compensated according to a probe radius of the contact probe.
According to another aspect of the present disclosure, a blade detecting device is further provided, including: a measurement data acquisition unit configured to acquire first measurement data of a profile of a blade section based on a contact probe and second measurement data of the profile based on a non-contact probe; the projection data determination unit is configured to project the first measurement data and the second measurement data on the theoretical section of the blade to respectively obtain first projection data and second projection data; a leaf contour reconstruction unit configured to reconstruct a leaf contour from the first projection data and the second projection data; and the blade profile measurement value determining unit is configured to evaluate and analyze the reconstructed blade profile and acquire blade profile measurement values of the blade section.
In some embodiments, the blade detection apparatus further comprises: the blade assignment unit is configured to assign values to the blade sections according to the blade profile measurement values of the blade sections; a cutting data acquisition unit configured to acquire cutting surface profile measurement data of a slice cut along the assigned blade section; the data comparison unit is configured to compare the cutting surface profile measurement data with the reconstructed data of the leaf profile; and the accuracy judging unit is configured to determine the blade profile measured value of the blade section as an accurate value if the comparison result is smaller than the threshold value.
According to another aspect of the present disclosure, there is also provided a blade detecting device, including: a memory; and a processor coupled to the memory, the processor configured to perform the blade detection method as described above based on instructions stored in the memory.
According to another aspect of the present disclosure, a computer-readable storage medium is also proposed, on which computer program instructions are stored, which instructions, when executed by a processor, implement the blade detection method described above.
Compared with the prior art, in the embodiment of the disclosure, the blade profile of the blade section is detected by adopting two measurement modes, namely a contact measurement mode and a non-contact measurement mode, the measurement result is projected onto the theoretical section of the blade, the blade profile is reconstructed according to the projected data, and the blade profile measurement value of the blade section is obtained after the reconstructed blade profile is evaluated and analyzed. Due to the fact that two measuring modes of combining a three-coordinate contact measuring method and an optical non-contact measuring method are adopted, the accuracy of blade section detection can be improved. Furthermore, the method can be compared with the blade detection result provided by the supplier to judge whether the blade quality provided by the blade supplier is qualified.
Other features of the present disclosure and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description, serve to explain the principles of the disclosure.
The present disclosure may be more clearly understood from the following detailed description, taken with reference to the accompanying drawings, in which:
FIG. 1 is a schematic flow diagram of some embodiments of a blade inspection method of the present disclosure.
FIG. 2 is a flow diagram of further embodiments of a blade inspection method of the present disclosure.
FIG. 3 is a schematic structural view of some embodiments of a blade detection apparatus of the present disclosure.
FIG. 4 is a schematic structural diagram of further embodiments of the blade detection apparatus of the present disclosure.
FIG. 5 is a schematic structural diagram of further embodiments of the blade detection apparatus of the present disclosure.
Detailed Description
Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present disclosure unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
For the purpose of promoting a better understanding of the objects, aspects and advantages of the present disclosure, reference is made to the following detailed description taken in conjunction with the accompanying drawings.
Due to the complexity of blade profile parameters, the accuracy of the current domestic blade profile parameter measurement method for various blades lacks an effective verification means, so that a domestic and industry-recognized blade profile parameter assignment method is not formed.
In addition, the domestic civil aviation engine host factory does not have the condition for developing comparison verification based on the assigned blade samples for the blade suppliers, and an effective verification means is lacked for the accuracy of the detection results of the blade suppliers.
FIG. 1 is a schematic flow diagram of some embodiments of a blade inspection method of the present disclosure.
At step 110, first measurement data of the profile of the blade section is acquired based on the contact probe, and second measurement data of the profile is acquired based on the non-contact probe.
In some embodiments, the blade is an aircraft engine blade.
In some embodiments, the contour of the selected blade section is measured using iso-sectioning measurements for the blade section to be tested and assigned.
In some embodiments, the profile is measured using a three-coordinate measuring machine that includes a contact probe three-coordinate measuring machine, a non-contact probe three-coordinate measuring machine, or a three-coordinate measuring machine that includes both a contact probe and a non-contact probe. For example, the measurement data of the profile of the leaf obtained by the contact measurement with three coordinates is used as the first measurement data, and the measurement data of the profile of the leaf obtained by the contact measurement without optical use is used as the second measurement data.
In step 120, the first measurement data and the second measurement data are projected on the theoretical section of the blade to obtain first projection data and second projection data, respectively.
In some embodiments, a theoretical section of the blade, i.e., a section of the blade model taken at a theoretical height.
In some embodiments, the first measurement data and the second measurement data are respectively projected onto a theoretical plane of the blade section to be assigned, i.e. into the theoretical blade section, corresponding to the first projection data and the second projection data forming the profile of the blade profile.
In some embodiments, the measured coordinate value representing the section height in the first measurement data and the second measurement data is corrected by a theoretical coordinate value of the section height, that is, a height value of a section where the blade is located is constructed on the theoretical section of the blade.
In some embodiments, the first projection data is projection data compensated according to a probe radius of the contact probe. Because the probe of the contact probe has a radius, the projection data needs to be compensated according to the radius of the probe, and the accuracy of the subsequent reconstruction of the profile of the blade profile is improved.
In step 130, the leaf contour is reconstructed from the first projection data and the second projection data.
In some embodiments, the data of the leaf back region and the leaf basin region in the first projection data are taken as the data of the leaf back region and the leaf basin region of the reconstructed leaf profile. And respectively taking the data of the blade profile leading edge region and the blade profile trailing edge region in the second projection data as the data of the blade profile leading edge region and the blade profile trailing edge region of the reconstructed blade profile.
When the blade profile is reconstructed, a three-coordinate contact type measuring method is adopted for areas with gentle curvature changes such as a blade basin and a blade back, and an optical non-contact type measuring method is adopted for areas with large curvature changes such as a blade front edge and a blade tail edge, so that inherent defects of the respective methods are avoided.
In step 140, the reconstructed profile is evaluated and analyzed to obtain a profile measurement value of the blade section.
In some embodiments, the reconstructed blade profile is evaluated and analyzed by using blade evaluation and analysis software, and blade profile measurement values of blade sections are obtained. That is, data is acquired for the blade cross-sectional profile and for each sample point within the profile.
In the embodiment, the blade profile of the blade section is detected by adopting two measurement modes, namely a contact measurement mode and a non-contact measurement mode, the measurement result is projected onto the theoretical section of the blade, the blade profile is reconstructed according to the projected data, and the blade profile measurement value of the blade section is obtained after the reconstructed blade profile is evaluated and analyzed. Due to the fact that two measuring modes of combining a three-coordinate contact measuring method and an optical non-contact measuring method are adopted, the accuracy of blade section detection can be improved. Furthermore, the method can be compared with the blade detection result provided by the supplier to judge whether the blade quality provided by the blade supplier is qualified.
FIG. 2 is a flow diagram of further embodiments of a blade inspection method of the present disclosure.
At step 210, first measurement data of a profile of a blade section is acquired based on a contact probe and second measurement data of the profile is acquired based on a non-contact probe.
In some embodiments, before the blade profile contour of the blade section is measured, in addition to the conventional gauge head calibration, the contact probe and the non-contact gauge head are subjected to associated calibration, the probe with higher measurement precision is used as a main gauge head, and the main gauge head is used for establishing a measurement coordinate system for the clamped blade.
In some embodiments, the profile of the airfoil is measured in a scanning fashion.
In some embodiments, the intervals between the measurement points should be less than the threshold, for example, less than 0.01mm, and the more the number of points is taken, the greater the sampling density is, the more accurate the measurement result is.
In step 220, the first measurement data and the second measurement data are projected on the theoretical section of the blade to obtain first projection data and second projection data, respectively.
In step 230, the first projection data and the second projection data are registered, and third projection data corresponding to the second projection data with the first projection data as a reference is obtained.
In some embodiments, at least one of the dorsal and pelvic regions of the first projection data is registered with a corresponding region in the second projection data; and determining third projection data by taking the data of at least one region in the leaf back region and the leaf basin region in the first projection data as a target point set.
For example, when the first projection data and the second projection data are registered, since the curvature changes of the blade basin and the blade back are gentle, and the curvature changes of the blade front edge and the blade tail edge are large, the registration is performed by using the corresponding points of the blade back and the blade basin area, and the corresponding points of the blade profile front edge and the blade profile tail edge area do not participate in the registration calculation. And taking the data of the leaf back region and the leaf basin region of the first projection data as a target point set to obtain the third projection data after registration.
In step 240, the data of the leaf back region and the leaf basin region in the first projection data are respectively used as the data of the leaf back region and the leaf basin region of the reconstructed leaf profile; and taking the data of the blade profile leading edge region and the blade profile trailing edge region in the third projection data as the data of the blade profile leading edge region and the blade profile trailing edge region of the reconstructed blade profile.
The contact type measuring method has higher precision, so that the contact type measuring method is adopted for the areas with more gradual curvature change of the leaf basin and the leaf back. However, since the contact measurement method needs to compensate the radius of the probe, and there is an error in compensating the radius in the region where the curvature change is large, such as the leading edge and the trailing edge of the blade, the non-contact measurement method is adopted.
In step 250, the reconstructed blade profile is evaluated and analyzed by using blade evaluation and analysis software, and a blade profile measured value of the blade section is obtained.
In the embodiment, the blade profile of the blade is measured in a partitioning manner, a three-coordinate contact type measuring method is adopted for areas with gentle curvature changes such as the basin and the back of the blade, an optical non-contact type measuring method is adopted for areas with large curvature changes such as the front edge and the tail edge of the blade, and the advantages of each measuring mode are adopted, so that the blade profile measuring value of the section of the blade is more accurate, and a high-precision approximate true value can be given to the blade profile geometric parameters of the real object blade.
In other embodiments of the present disclosure, the blade detection method further comprises the following steps 260-290.
At step 260, a value is assigned to the blade section based on the blade profile measurement of the blade section.
At step 270, cut-plane profile measurement data is obtained for a slice cut along the assigned blade section.
In some embodiments, the blade after the blade profile parameters are assigned is cut along the assigned section by using a low-speed one-way spark line. And 2D measuring the profile of the marked cutting surface of the slice by adopting a high-precision optical image measuring instrument to obtain the profile measuring data of the cutting surface. The maximum allowable indication error of the plane 2D of the high-precision optical image measuring instrument should not exceed a threshold, for example, it should not exceed ± (1.5+ L/200) μm (L is a range, unit mm).
In some embodiments, before cutting the section of the blade, a positioning reference plane or a correlation plane with geometric tolerance requirements when the blade profile parameters are assigned to the blade face is ensured according to the clamping mode of the blade. When the blade section is cut, the trimming amount is compensated into the cutter feeding amount, and the surface roughness of the cut surface should not exceed Ra1.6. And after the section of the blade is cut, cutting the cutting surface from the blade substrate, wherein the thickness of the cut piece is not more than 0.3mm, and marking the cutting surface.
In some embodiments, if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is smaller than the threshold value, or the projection profile of the cutting surface along the height direction of the blade body is larger than the projection profile of the other cutting surface, the profile of the cutting surface of the slice is measured by using a backlight method, and the measurement data of the profile of the cutting surface is obtained.
For example, when the variation of the upper and lower end surfaces of the slice along the height direction of the blade body is small, or when the projected contour of the marked cutting surface along the height direction of the blade body completely covers the projected contour of another section of the slice, the marked cutting surface is downward, and the contour boundary is measured by using a backlight method.
In some embodiments, if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is greater than or equal to a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is less than or equal to the projection profile of the other cutting surface, the profile of the cutting surface of the slice is measured by using a top light method, and the measurement data of the profile of the cutting surface is obtained.
For example, when the upper and lower end surfaces of the slice change greatly along the height direction of the blade body, or the projected contour of the marked cutting surface along the height direction of the blade body is completely located in the projected contour of another cutting surface of the slice, the marked cutting surface is directed upward, and the contour boundary is measured by using a top light method.
In some embodiments, the pitch of the sampling points should be less than a threshold, for example less than 0.01mm, when measuring the cutting surface profile measurement data.
At step 280, the cut surface profile measurement data is compared to the reconstructed leaf profile data.
In some embodiments, the cutting surface profile measurement data is used as a target point set, the cutting surface profile of the slice is registered with the reconstructed leaf profile, and the distance between each measurement point in the cutting surface profile measurement data and a corresponding measurement point in the reconstructed leaf profile data is determined.
In step 290, if the comparison result is smaller than the threshold, the profile measurement value of the blade section is determined to be an accurate value.
In some embodiments, after the registration, the distance between each measurement point in the measurement data of the cutting surface profile and the corresponding measurement point in the reconstructed data of the blade profile is less than one sixth of the upper and lower tolerance bands of the profile tolerance of the corresponding blade at the point, which indicates that the blade profile measurement value of the blade section of the present disclosure is an accurate value.
In the embodiment, the accuracy of the assignment method disclosed by the disclosure can be verified by comparing the cutting surface profile measurement data with the reconstructed blade profile data, the problem that an effective verification means for the accuracy of various blade profile parameter measurement methods in the prior art is lacked is solved, and then the blade detection method disclosed by the disclosure can be used for assigning values to blades to verify the detection result of a blade supplier.
FIG. 3 is a schematic structural view of some embodiments of a blade detection apparatus of the present disclosure. The apparatus includes a measurement data acquisition unit 310, a projection data determination unit 320, a profile reconstruction unit 330, and a profile measurement value determination unit 340.
The measurement data acquisition unit 310 is configured to acquire first measurement data of a profile of a blade section based on a contact probe and second measurement data of the profile based on a non-contact probe.
In some embodiments, the blade is an aircraft engine blade.
The projection data determination unit 320 is configured to project the first measurement data and the second measurement data on the theoretical blade cross section to obtain first projection data and second projection data, respectively.
In some embodiments, the first projection data is projection data compensated according to a probe radius of the contact probe.
In some embodiments, the measured coordinate values representing the height of the section in the first measurement data and the second measurement data are corrected by the theoretical coordinate value of the height of the section, that is, the height value of the section where the blade is located on the theoretical section of the blade is constructed.
In some embodiments, the first projection data and the second projection data are registered, and third projection data corresponding to the second projection data with the first projection data as a reference is obtained. For example, at least one of a dorsal region and a pelvic region of the first projection data is registered with a corresponding region in the second projection data; and determining third projection data by taking the data of at least one region in the leaf back region and the leaf basin region in the first projection data as a target point set.
The leaf contour reconstruction unit 330 is configured to reconstruct the leaf contour from the first projection data and the second projection data.
In some embodiments, the leaf profile is reconstructed from the first projection data and the third projection data. For example, the data of the leaf back region and the leaf basin region in the first projection data are respectively used as the data of the leaf back region and the leaf basin region of the reconstructed leaf profile; and respectively taking the data of the blade profile leading edge region and the blade profile trailing edge region in the third projection data as the data of the blade profile leading edge region and the blade profile trailing edge region of the reconstructed blade profile.
The contact type measuring method has higher precision, so that the contact type measuring method is adopted for the areas with more gradual curvature change of the leaf basin and the leaf back. However, because the contact measurement mode needs to compensate the radius of the probe, and the radius compensation has errors in areas with large curvature changes, such as the front edge and the tail edge of the blade, the non-contact measurement mode is adopted, and the advantages of each measurement mode are adopted, so that the blade profile measurement value of the blade section is more accurate.
The profile measurement value determination unit 340 is configured to perform evaluation analysis on the reconstructed profile, and obtain a profile measurement value of the blade section. That is, data is acquired for the blade cross-sectional profile and for each sample point within the profile.
In the embodiment, the blade profile of the blade section is detected by adopting two measurement modes, namely a contact measurement mode and a non-contact measurement mode, the measurement result is projected onto the theoretical section of the blade, the blade profile is reconstructed according to the projected data, and the blade profile measurement value of the blade section is obtained after the reconstructed blade profile is evaluated and analyzed. Due to the fact that two measuring modes of combining a three-coordinate contact measuring method and an optical non-contact measuring method are adopted, the accuracy of blade section detection can be improved.
FIG. 4 is a schematic structural diagram of further embodiments of the blade detection apparatus of the present disclosure. The device further comprises a blade assignment unit 410, a cutting data acquisition unit 420, a data comparison unit 430 and an accuracy judgment unit 440.
The blade assigning unit 410 is configured to assign a blade section according to a profile measurement of the blade section.
The cutting data acquisition unit 420 is configured to acquire cutting plane profile measurement data of a slice cut along the assigned blade section.
In some embodiments, if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is smaller than the threshold value, or the projection profile of the cutting surface along the height direction of the blade body is larger than the projection profile of the other cutting surface, the profile of the cutting surface of the slice is measured by using a backlight method, and the measurement data of the profile of the cutting surface is obtained.
In some embodiments, if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is greater than or equal to a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is less than or equal to the projection profile of the other cutting surface, the profile of the cutting surface of the slice is measured by using a top light method, and the measurement data of the profile of the cutting surface is obtained.
The data comparison unit 430 is configured to compare the cutting surface profile measurement data with the reconstructed data of the leaf profile.
In some embodiments, the cutting surface profile measurement data is used as a target point set, the cutting surface profile of the slice is registered with the reconstructed leaf profile, and the distance between each measurement point in the cutting surface profile measurement data and a corresponding measurement point in the reconstructed leaf profile data is determined.
The accuracy determination unit 440 is configured to determine the profile measurement value of the blade section as an accurate value if the comparison result is less than the threshold value.
In the embodiment, the accuracy of the assignment method can be verified by comparing the cutting surface profile measurement data with the reconstructed blade profile data, the problem that an effective verification means for the accuracy of various blade profile parameter measurement methods in the prior art is lacked is solved, and then the blade can be assigned by using the blade detection method disclosed by the invention to verify the detection result of a blade supplier.
FIG. 5 is a schematic structural diagram of further embodiments of the blade detection apparatus of the present disclosure. The apparatus includes a memory 510 and a processor 520. Wherein: the memory 510 may be a magnetic disk, flash memory, or any other non-volatile storage medium. The memory 510 is used to store instructions in the embodiments corresponding to fig. 1-2. Processor 520 is coupled to memory 510 and may be implemented as one or more integrated circuits, such as a microprocessor or microcontroller. The processor 520 is configured to execute instructions stored in memory.
In other embodiments of the present disclosure, processor 520 is coupled to memory 510 by a BUS BUS 530. The apparatus 500 may be further connected to an external storage device 550 through a storage interface 540 for accessing external data, and may be further connected to a network or another computer system (not shown) through a network interface 560, which will not be described in detail herein.
In the embodiment, the data instructions are stored in the memory, and the instructions are processed by the processor, so that the accuracy of blade section detection can be improved.
In other embodiments, a computer-readable storage medium has stored thereon computer program instructions which, when executed by a processor, implement the steps of the method in the embodiments corresponding to fig. 1-2. As will be appreciated by one skilled in the art, embodiments of the present disclosure may be provided as a method, apparatus, or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present disclosure is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
Thus far, the present disclosure has been described in detail. Some details that are well known in the art have not been described in order to avoid obscuring the concepts of the present disclosure. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.
Claims (12)
1. A blade inspection method, comprising:
acquiring first measurement data of a profile of a blade section based on a contact probe, and acquiring second measurement data of the profile based on a non-contact probe;
projecting the first measurement data and the second measurement data on a theoretical section of the blade to respectively obtain first projection data and second projection data;
reconstructing the leaf profile according to the first projection data and the second projection data; and
and evaluating and analyzing the reconstructed blade profile to obtain a blade profile measured value of the blade section.
2. The blade detection method of claim 1, wherein reconstructing the profile comprises:
registering the first projection data and the second projection data to obtain third projection data which is based on the first projection data and corresponds to the second projection data; and
and reconstructing the leaf profile according to the first projection data and the third projection data.
3. The blade detection method of claim 2, wherein reconstructing the profile comprises:
respectively taking the data of the leaf back area and the leaf basin area in the first projection data as the data of the leaf back area and the leaf basin area of the reconstructed leaf profile; and
and respectively taking the data of the blade profile leading edge region and the blade profile trailing edge region in the third projection data as the data of the blade profile leading edge region and the blade profile trailing edge region of the reconstructed blade profile.
4. The blade detection method according to claim 2, wherein obtaining third projection data corresponding to the second projection data with reference to the first projection data comprises:
registering at least one of a dorsal region and a pelvic region of the first projection data with a corresponding region in the second projection data; and
and determining the third projection data by taking the data of at least one region of the leaf back region and the leaf basin region in the first projection data as a target point set.
5. The blade detection method according to any one of claims 1 to 4, further comprising:
assigning the blade section according to the blade profile measuring value of the blade section;
obtaining cutting surface profile measurement data of a slice cut along the section of the assigned blade;
comparing the cutting surface profile measurement data with the reconstructed leaf profile data; and
and if the comparison result is smaller than the threshold value, determining the blade profile measured value of the blade section as an accurate value.
6. The blade inspection method of claim 5, wherein acquiring cut face profile measurement data for the slice comprises:
if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is smaller than a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is larger than the projection profile of the other cutting surface, measuring the profile of the cutting surface of the slice by adopting a backlight method to obtain the profile measurement data of the cutting surface; and
and if the variation value of the upper end surface and the lower end surface of the slice along the height direction of the blade body is larger than or equal to a threshold value, or the projection profile of the cutting surface along the height direction of the blade body is smaller than or equal to the projection profile of the other cutting surface, measuring the profile of the cutting surface of the slice by adopting a top light method, and obtaining the profile measurement data of the cutting surface.
7. The blade inspection method of claim 5, wherein comparing the cut surface profile measurement data with the reconstructed profile data comprises:
and registering the cut surface profile of the slice with the reconstructed leaf profile by taking the cut surface profile measurement data as a target point set, and determining the distance between each measurement point in the cut surface profile measurement data and a corresponding measurement point in the reconstructed leaf profile data.
8. The blade inspection method according to any one of claims 1 to 4, wherein the first projection data is projection data compensated according to a probe radius of the contact probe.
9. A blade inspection device comprising:
a measurement data acquisition unit configured to acquire first measurement data of a profile of a blade section based on a contact probe and second measurement data of the profile based on a non-contact probe;
the projection data determination unit is configured to project the first measurement data and the second measurement data on a theoretical section of the blade to respectively obtain first projection data and second projection data;
a leaf contour reconstruction unit configured to reconstruct the leaf contour from the first projection data and the second projection data; and
and the blade profile measurement value determining unit is configured to evaluate and analyze the reconstructed blade profile and acquire the blade profile measurement value of the blade section.
10. The blade detection apparatus of claim 9, further comprising:
the blade assignment unit is configured to assign a blade section according to the blade profile measurement value of the blade section;
a cutting data acquisition unit configured to acquire cutting surface profile measurement data of a slice cut along the assigned blade section;
the data comparison unit is configured to compare the cutting surface profile measurement data with the reconstructed data of the leaf profile; and
and the accuracy judging unit is configured to determine the blade profile measured value of the blade section as an accurate value if the comparison result is smaller than a threshold value.
11. A blade inspection device comprising:
a memory; and
a processor coupled to the memory, the processor configured to perform the blade detection method of any of claims 1 to 8 based on instructions stored in the memory.
12. A computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the blade detection method of any one of claims 1 to 8.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117346722A (en) * | 2023-09-13 | 2024-01-05 | 华中科技大学 | Aeroengine blade profile contour measurement method based on three-coordinate measurement |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117346722A (en) * | 2023-09-13 | 2024-01-05 | 华中科技大学 | Aeroengine blade profile contour measurement method based on three-coordinate measurement |
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