Turbine blade intelligent detection device and method

Abstract

The invention relates to the technical field of heavy duty gas turbines, in particular to an intelligent turbine blade detection device and method, and the device comprises a clamping mechanism, a scanning mechanism, a shooting mechanism and a central controller. The clamping mechanism is used for clamping the turbine blade; the scanning mechanism and the shooting mechanism are arranged on the two sides of the fixed base respectively. The scanning mechanism comprises a stripe projection set and a high-speed camera. The shooting mechanism is provided with a conventional camera; a stripe image is projected to the turbine blade through the stripe projection group, the deformed stripe image is shot by the high-speed camera, then stripe image information is transmitted to the central controller, the 3D real morphology of the measured blade is formed in cooperation with the surface morphology information, shot by the conventional camera, of the turbine blade, and the 3D real morphology is compared with data in a database for analysis and judgment. The technical problem that in the prior art, the turbine blade of the heavy-duty gas turbine excessively depends on detection personnel, and the detection reliability and efficiency are poor is solved, and automatic defect identification and judgment of the turbine blade of the heavy-duty gas turbine are completed.

Description

Technical Field

[0001] The present invention relates to the technical field of heavy-duty gas turbines, and in particular to an intelligent detection device and method for turbine blades. Background Art

[0002] Due to the long operating times and high inlet temperatures of heavy-duty gas turbines, turbine blades must withstand extremely high temperatures, which can lead to problems such as thermal fatigue, oxidation, and creep in the materials. Furthermore, turbine blades rotate at extremely high speeds during operation, generating centrifugal forces that increase the mechanical stress in the materials, potentially causing fatigue cracks and fractures. Under long-term exposure to complex temperature and stress loads, turbine blades experience repeated thermal cycling and mechanical loading, leading to the accumulation of fatigue damage. This can easily lead to damage such as cracks, corrosion, ablation, and coating peeling, resulting in reduced gas turbine efficiency and even catastrophic failure. Therefore, regular inspections are key to ensuring safe operation and extending the life of the equipment.

[0003] Currently, manual inspection is generally used for turbine blades, which requires maintenance personnel to observe on-site and conduct appearance inspections.

[0004] However, heavy-duty gas turbine blades are numerous and heavy, and on-site appearance inspections are arduous. They rely too much on the inspectors' carefulness and judgment standards, are greatly affected by human factors, and are not traceable, which greatly affects the reliability and efficiency of turbine blade inspections. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent detection device and method for turbine blades to solve the technical problems in the prior art that heavy-duty gas turbine turbine blades are numerous and heavy, the workload of on-site appearance inspection is heavy, and there is excessive reliance on the inspection care and judgment standards of the inspectors, which is greatly affected by human factors and cannot be traced, greatly affecting the reliability and efficiency of turbine blade inspection.

[0006] In a first aspect, the present invention provides an intelligent detection device for turbine blades, comprising a clamping mechanism, a scanning mechanism, a photographing mechanism, and a central controller; The clamping mechanism comprises a fixed base and a rotating platform arranged on the fixed base for rotating in a horizontal direction, wherein a clamping assembly is arranged on the rotating platform, and the clamping assembly is used to clamp the turbine blade; The scanning mechanism is disposed on one side of the fixed base, and includes a fringe projection group and a high-speed camera. The fringe projection group and the high-speed camera are disposed toward the turbine blade. The fringe projection group is configured to project a fringe image onto the turbine blade, and the high-speed camera is configured to capture the deformed fringe image on the turbine blade. The photographing mechanism is arranged on the other side of the fixed base, the photographing mechanism is arranged toward the turbine blade, and the photographing mechanism has a conventional camera for photographing surface topography information of the turbine blade; The central controller is fixed to the fixed base, and the rotating platform, the clamping assembly, the fringe projection group, the high-speed camera and the conventional camera are respectively connected to the central controller.

[0007] Furthermore, a fixing groove is provided on the rotating platform, and the fixing groove extends in a vertical direction so that the turbine blade can partially extend into the fixing groove.

[0008] Furthermore, the clamping assembly includes a pressure plate, a pressure head and a telescopic group; The pressure plate is arranged on one side of the fixed groove, and the pressure head is arranged on the other side of the fixed groove. The telescopic group includes a first driving member and a telescopic member. The pressure head is arranged at one end of the telescopic member close to the pressure plate. The first driving member can drive the telescopic member to move toward or away from the pressure plate, so that the pressure head can press the turbine blade against the pressure plate.

[0009] Furthermore, a sponge layer is provided on one side of the pressure plate close to the pressure head; A sponge layer is provided on the pressure head.

[0010] Furthermore, the fringe projection group includes a laser, a lens array and a micromirror; The laser, the lens array, and the micromirror are arranged linearly with the turbine blades, the laser being configured to emit a laser beam toward the turbine blades, the lens array being configured to convert the laser beam into projection stripes, and the micromirror being configured to convert the projection stripes into stripe images having phase-shifted binary stripes and Gray stripes; the scanning mechanism further comprising a scanning box; The scanning box body comprises an upper box body and a lower box body that are detachably connected. The lower box body is provided with a plurality of first receiving grooves arranged at linear intervals. The laser, the lens array, and the micromirror are sequentially arranged in the first receiving grooves. The upper box body is buckled onto the lower box body. A scanning channel is provided on a side of the lower box body close to the turbine blades for the stripe image to pass through. A second accommodating groove is further provided in the lower box body, and the high-speed camera is arranged in the second accommodating groove. A collecting channel is provided on one side of the lower box body close to the turbine blades, and the collecting channel, the high-speed camera and the turbine blades are arranged linearly.

[0011] Furthermore, the shooting mechanism further includes a shooting box; A third accommodating groove is provided in the shooting box body, and the conventional camera is provided in the third accommodating groove. A shooting channel is provided on a side of the shooting box body close to the turbine blades, and the conventional camera, the shooting channel and the turbine blades are arranged linearly.

[0012] Furthermore, the turbine blade intelligent detection device further comprises a support arm and a sliding plate; The support arm is arranged on the fixed base along the vertical direction, and the two support arms are arranged on both sides of the rotating platform opposite to each other along the first horizontal direction. A slide groove is provided on the top of each support arm, and the sliding plate is slidably arranged in the slide groove along the second horizontal direction, and the first horizontal direction and the second horizontal direction are perpendicular to each other; The shooting box body is arranged on one of the sliding plates, and the scanning box body is arranged on the other sliding plate.

[0013] Furthermore, the support arm includes a fixed rod, a telescopic rod and a locking member; The fixing rod is fixed to the fixing base, the telescopic rod is slidably arranged on the fixing rod along a vertical direction, and the locking member can fix the fixing rod and the telescopic rod.

[0014] Furthermore, the central controller includes a control host and a storage unit; The control host is respectively connected to the clamping mechanism, the scanning mechanism and the shooting mechanism to obtain the stripe image and the surface morphology information. The storage unit is configured to store standard turbine blade information and blade curve information. The control host is connected to the storage unit to compare the stripe image and the surface morphology information with the standard turbine blade information and the blade curve information.

[0015] In a second aspect, the present invention further provides a method for intelligent detection of turbine blades, which uses the above-mentioned intelligent detection device for turbine blades, comprising: Step 1: Clamp the turbine blades on the rotating platform; Step 2: The fringe projection group projects a fringe image onto the turbine blade, and uses a high-speed camera to capture the deformed fringe image on the turbine blade; Step 3: The photographing mechanism photographs the surface morphology information of the turbine blade; Step 4: The central processing unit forms a 3D true morphology of the heavy-duty gas turbine blade under test based on the deformed fringe image and surface morphology information, compares it with the data in the database, analyzes and records the unique identification number and defect information of the blade under test.

[0016] Compared with the prior art, the present invention provides an intelligent detection device for turbine blades, comprising a clamping mechanism, a scanning mechanism, a photographing mechanism and a central controller; the clamping mechanism comprises a fixed base and a rotating platform arranged on the fixed base and rotating in a horizontal direction, the rotating platform is provided with a clamping assembly, and the clamping assembly is used to clamp the turbine blade; the scanning mechanism is arranged on one side of the fixed base, the scanning mechanism comprises a stripe projection group and a high-speed camera, the stripe projection group and the high-speed camera are arranged toward the turbine blade, the stripe projection group is configured to be able to project a stripe image onto the turbine blade, and the high-speed camera is configured to be able to photograph deformed stripe images on the turbine blade; the photographing mechanism is arranged on the other side of the fixed base, the photographing mechanism is arranged toward the turbine blade, and the photographing mechanism has a conventional camera for photographing surface morphology information of the turbine blade; the central controller is fixed to the fixed base, and the rotating platform, the clamping assembly, the stripe projection group, the high-speed camera and the conventional camera are respectively connected to the central controller; by clamping the turbine blade on the rotating platform and projecting the stripe image onto the turbine blade through the stripe projection group, and then by The deformed stripe image of the high-speed camera transmits the stripe image information to the central controller, and combines it with the surface morphology information of the turbine blade taken by the conventional camera to form the 3D real morphology of the heavy-duty gas turbine turbine blade under test, which is then compared with the data in the database, and the unique identification number and defect information of the tested blade are analyzed and recorded. This solves the technical problems in the existing technology that the heavy-duty gas turbine turbine blades are numerous and heavy, the on-site appearance inspection workload is heavy, and it is overly dependent on the inspection care and judgment standards of the inspectors, which is greatly affected by human factors and cannot be traced, greatly affecting the reliability and efficiency of turbine blade inspection. The automatic recognition and judgment of the 3D features of defects such as cracks, corrosion, ablation, and coating peeling of gas turbine turbine blades is completed. The test results are intuitive, accurate, reliable, easy to store and review, and have traceability, which is beneficial to assisting production personnel in determining the damage of the equipment so as to adjust the operating conditions of subsequent equipment. At the same time, the detection device is simple to operate, easy to move, and easy to use, greatly improving the detection efficiency and having broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of the overall structure of the intelligent detection device for turbine blades provided in an embodiment of the present invention; Figure 2 A top view of the overall structure of the intelligent detection device for turbine blades provided by an embodiment of the present invention; Figure 3 A schematic structural diagram of a lower housing in a turbine blade intelligent detection device provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a support arm in a turbine blade intelligent detection device provided by an embodiment of the present invention; Figure 5 A schematic structural diagram of a sliding plate in a turbine blade intelligent detection device provided by an embodiment of the present invention; Figure 6 A schematic diagram of the overall structure of a turbine blade intelligent detection device provided by an embodiment of the present invention; Figure 7 This is a flow chart of the intelligent detection method for turbine blades provided in an embodiment of the present invention.

[0019] Reference numerals: 100, clamping mechanism; 110, fixed base; 120, rotating platform; 121, fixing slot; 131, pressure plate; 132, pressure head; 133, telescopic group; 140, support arm; 141, fixed rod; 142, telescopic rod; 150, sliding plate; 200, scanning mechanism; 210, fringe projection assembly; 211, laser; 212, lens array; 213, micromirror; 220, high-speed camera; 232, lower housing; 233, first receiving tank; 234, second receiving tank; 300, shooting mechanism; 310, conventional camera; 320, shooting box; 400. Central controller. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0023] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0025] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0026] The following embodiments of the present invention are described in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments may be combined with each other.

[0027] Example 1 like Figure 1 、 Figure 2 and Figure 6As shown, an embodiment of the present invention provides an intelligent detection device for turbine blades, comprising a clamping mechanism 100, a scanning mechanism 200, a photographing mechanism 300 and a central controller 400; the clamping mechanism 100 comprises a fixed base 110 and a rotating platform 120 which is arranged on the fixed base 110 and rotates in a horizontal direction; a clamping assembly is arranged on the rotating platform 120, and the clamping assembly is used to clamp the turbine blades; the scanning mechanism 200 is arranged on one side of the fixed base 110, and the scanning mechanism 200 comprises a fringe projection group 210 and a high-speed camera 220, and the fringe projection group 210 and the high-speed camera 220 are directed toward the turbine blades. A flat blade is set up, the fringe projection group 210 is configured to project a fringe image onto the turbine blade, and the high-speed camera 220 is configured to capture the deformed fringe image on the turbine blade; the shooting mechanism 300 is set on the other side of the fixed base 110, and the shooting mechanism 300 is set toward the turbine blade, and the shooting mechanism 300 has a conventional camera 310 for capturing the surface morphology information of the turbine blade; the central controller 400 is fixed to the fixed base 110, and the rotating platform 120, the clamping assembly, the fringe projection group 210, the high-speed camera 220 and the conventional camera 310 are respectively connected to the central controller 400.

[0028] That is, the present invention provides an intelligent inspection device for turbine blades, which clamps the turbine blades on a rotating platform 120 and projects a stripe image onto the turbine blades through a stripe projection group 210. The stripe image is then deformed by a high-speed camera 220 and the stripe image information is transmitted to a central controller 400. The stripe image information is combined with the surface morphology information of the turbine blades captured by a conventional camera 310 to form a 3D real morphology of the turbine blades of the heavy-duty gas turbine under test, thereby comparing it with the data in the database, analyzing and recording the unique identification number and defect information of the blades under test, and solving the problem of the large number and heavy weight of the turbine blades of the heavy-duty gas turbine in the prior art and the difficulty in the on-site appearance. The inspection workload is heavy, overly dependent on the inspection meticulousness and judgment standards of the inspectors, greatly affected by human factors, and cannot be traced, which greatly affects the reliability and efficiency of turbine blade inspection. The technical problem has completed the automatic identification and judgment of the 3D features of defects such as cracks, corrosion, ablation, and coating peeling of gas turbine turbine blades. The inspection results are intuitive, accurate, and reliable, easy to store and review, and traceable, which is conducive to assisting production personnel to determine the damage of equipment in order to adjust the operating conditions of subsequent equipment. At the same time, this inspection device is simple to operate, easy to move, and easy to use, which greatly improves the inspection efficiency and has broad application prospects.

[0029] Specifically, in this embodiment, the clamping mechanism 100 includes a fixed base 110 and a rotating platform 120 mounted on the fixed base 110. The fixed base 110 is configured as a hollow rectangular box. A rotating motor is housed within the fixed base 110. The rotating motor is vertically arranged with its motor shaft facing vertically upward, allowing the rotating platform 120 to be horizontally connected to the rotating motor, which drives the rotating platform 120 for rotation. A clamping assembly is mounted on the rotating platform 120. The clamping assembly can include a clamping claw, a clamping arm, or two clamping components that can move toward or away from each other, thereby clamping the turbine blade and securing it vertically. A scanning mechanism 200 is mounted on one side of the fixed base 110. The scanning mechanism 200 includes a fringe projection assembly 210 and a high-speed camera 220, both of which are positioned toward the turbine blade. The fringe projection assembly 210 projects a fringe image onto the turbine blade, which deforms according to its shape. The high-speed camera 220 is capable of capturing images of deformed fringe patterns on the turbine blade. It is connected to the central controller 400 via wires, transmitting the captured fringe patterns to the central controller 400. A camera mechanism 300 is located on the other side of the fixed base 110, facing the turbine blade. A conventional camera 310 is housed within the camera mechanism 300. After completing a single capture and scan, the angle and position of the turbine blade can be adjusted by rotating the rotating platform 120, allowing for further capture and scanning. This allows the conventional camera 310 to capture surface topography information of the turbine blade, combined with the fringe patterns, allowing the central controller 400 to simulate the true 3D topography of the heavy-duty gas turbine blade under test. This can then be compared with data in a database, analyzing and recording the unique identification number and defect information of the inspected blade.

[0030] Preferably, a fixing slot 121 is provided on the rotating platform 120 , and the fixing slot 121 extends in a vertical direction so that the turbine blade can partially extend into the fixing slot 121 .

[0031] Specifically, the fixing groove 121 is a long groove with a width slightly larger than the turbine blade. The fixing groove 121 extends vertically from the upper surface of the rotating platform 120 into the rotating platform 120. In this way, the turbine blade can be inserted into the fixing groove 121, which facilitates the vertical fixation of the turbine blade.

[0032] Furthermore, the clamping assembly includes a pressure plate 131, a pressure head 132 and a telescopic group 133; the pressure plate 131 is arranged on one side of the fixed groove 121, the pressure head 132 is arranged on the other side of the fixed groove 121, the telescopic group 133 includes a first driving member and a telescopic member, the pressure head 132 is arranged at one end of the telescopic member close to the pressure plate 131, and the first driving member can drive the telescopic member to move toward or away from the pressure plate 131, so that the pressure head 132 can press the turbine blade against the pressure plate 131.

[0033] Specifically, in this embodiment, the first drive member is a thrust motor, and the telescopic member is a ball screw. The thrust motor is bolted to one side of the fixing slot 121 and connected to the ball screw via a coupling. The ball screw is positioned perpendicular to the turbine blades, and the pressure head 132 is positioned at one end of the ball screw near the pressure plate 131. On the other side of the fixing slot 121 is a pressure plate 131, which is vertically fixed to the rotating platform 120. This allows the first drive member to drive the ball screw and pressure head 132 toward or away from the pressure plate 131, allowing the pressure head 132 to press the turbine blades against the pressure plate 131, thereby ensuring stable fixation of the turbine blades.

[0034] Furthermore, a sponge layer is provided on one side of the pressure plate 131 close to the pressure head 132 ; and a sponge layer is provided on the pressure head 132 .

[0035] Specifically, the sponge layer is fixed to the surface of the pressure head 132 and the pressure plate 131 by bonding, thereby protecting the turbine blades of the heavy-duty gas turbine and improving the safety during measurement of the turbine blades of the heavy-duty gas turbine.

[0036] like Figure 2 and Figure 3 As shown, the stripe projection group 210 includes a laser 211, a lens array 212 and a micromirror 213; the laser 211, the lens array and the micromirror 213 are arranged linearly with the turbine blades, the laser 211 is configured to emit a laser beam to the turbine blades, the lens array is configured to convert the laser beam into projection stripes, and the micromirror 213 is configured to convert the projection stripes into stripe images having phase-shifted binary stripes and Gray stripes.

[0037] Specifically, a laser 211, a lens array, and a micromirror 213 are arranged linearly with the turbine blades. The laser 211 can emit a laser beam toward the turbine blades, which then passes through the lens array and micromirror 213 in sequence. The lens array converts the laser beam emitted by the laser 211 into projected fringes. In this embodiment, the micromirror 213 is configured as a DMD micromirror 213, which converts the projected fringes into a fringe image comprising phase-shifted binary fringes and Gray fringes. Thus, the fringe projection assembly 210 can project a fringe image suitable for scanning and modeling toward the turbine blades, facilitating 3D modeling by the central processing unit.

[0038] Preferably, the scanning mechanism 200 also includes a scanning box body; the scanning box body has a detachably connected upper box body and a lower box body 232, and a plurality of linearly spaced first receiving grooves 233 are provided in the lower box body 232, and the laser 211, the lens array and the micromirror device 213 are sequentially arranged in the first receiving grooves 233, the upper box body is buckled on the lower box body 232, and a scanning channel is provided on the side of the lower box body 232 close to the turbine blades for the stripe image to pass through; a second receiving groove 234 is also provided in the lower box body 232, and the high-speed camera 220 is provided in the second receiving groove 234, and a collection channel is provided on the side of the lower box body 232 close to the turbine blades, and the collection channel, the high-speed camera 220 and the turbine blades are linearly arranged.

[0039] Specifically, the scanning box is constructed as an irregularly shaped box. The upper and lower boxes 232 are detachably connected by bolts. Three linearly spaced first receiving slots 233 are provided within the lower box 232. The shapes and sizes of the three first receiving slots 233 are determined based on the shapes and sizes of the laser 211, lens array, and micromirror 213. All three slots are approximately rectangular, with the laser 211, lens array, and micromirror 213 positioned sequentially within their corresponding first receiving slots 233. The upper box is provided with a corresponding raised housing that mates with the first receiving slots 233 to secure the laser 211, lens array, and micromirror 213. Along the path extending from the laser 211, lens array, and micromirror 213, a scanning channel is provided on the side of the lower box 232 near the turbine blades for the fringe image to pass through. In this embodiment, the scanning channel is configured as a circular through-hole. The lower housing 232 also includes a second receiving slot 234, into which the high-speed camera 220 is mounted. The upper housing also includes a corresponding raised housing that mates with the second receiving slot 234 to secure the high-speed camera 220. A collection channel is provided on the side of the lower housing 232 near the turbine blades. The collection channel, high-speed camera 220, and turbine blades are arranged linearly. In this embodiment, the collection channel is configured as a circular through-hole. This allows the high-speed camera 220 to capture fringe images through the collection channel.

[0040] Preferably, the shooting mechanism 300 also includes a shooting box body 320; a third accommodating slot is provided in the shooting box body 320, the conventional camera 310 is provided in the third accommodating slot, and a shooting channel is provided on the side of the shooting box body 320 close to the turbine blades, and the conventional camera 310, the shooting channel and the turbine blades are arranged linearly.

[0041] Specifically, the imaging box 320 is configured as a regularly oriented box. A third receiving slot is provided within the imaging box 320, and the conventional camera 310 is positioned within the third receiving slot, thereby securing and protecting the conventional camera 310 within the imaging box 320. A photographic channel is provided on the side of the imaging box 320 near the turbine blades. The conventional camera 310, the photographic channel, and the turbine blades are arranged linearly. The photographic channel is configured as a circular through-hole, allowing the conventional camera 310 to capture surface topography information of the turbine blades through the photographic channel.

[0042] like Figure 4 and Figure 5 As shown, the intelligent detection device for turbine blades also includes a support arm 140 and a sliding plate 150; the support arm 140 is arranged on the fixed base 110 in the vertical direction, and the two support arms 140 are arranged on both sides of the rotating platform 120 relatively along the first horizontal direction, and a slide groove is provided on the top of the support arm 140. The sliding plate 150 is slidably arranged in the slide groove along the second horizontal direction, and the first horizontal direction and the second horizontal direction are perpendicular to each other; the shooting box body 320 is arranged on one of the sliding plates 150, and the scanning box body is arranged on the other sliding plate 150.

[0043] Specifically, two support arms 140 are bolted vertically to either side of the fixed base 110. The two support arms 140 are also positioned opposite each other along a first horizontal direction on either side of the rotating platform 120. This allows the camera mechanism 300 and the scanning mechanism 200 to be mounted on either side of the rotating platform 120, respectively, enabling simultaneous camera and scanning operations. A slide groove is provided at the top of each support arm 140, and a sliding plate 150 slides along the groove along a second horizontal direction. The first and second horizontal directions are perpendicular to each other. The camera housing 320 is bolted to one of the sliding plates 150, while the scanning housing is also bolted to the other sliding plate 150. This allows the horizontal positions of the camera housing 320 and the scanning housing to be adjusted by moving the sliding plate 150 along the groove, enabling the extensive acquisition of fringe images and surface topography information from turbine blades.

[0044] Preferably, the support arm 140 includes a fixed rod 141, a telescopic rod 142 and a locking piece; the fixed rod 141 is fixed to the fixed base 110, the telescopic rod 142 is slidably arranged on the fixed rod 141 along the vertical direction, and the locking piece can fix the fixed rod 141 and the telescopic rod 142.

[0045] Specifically, the fixed rod 141 is configured as a hollow rectangular tube, while the telescopic rod 142 is configured as a slightly smaller rectangular tube. This allows the telescopic rod 142 to slide vertically relative to the fixed rod 141. Both the fixed rod 141 and the telescopic rod 142 have circular through-holes, and locking members, specifically locking pins, are inserted into the through-holes to secure the fixed rod 141 and the telescopic rod 142. This allows the height of the camera mechanism 300 and the scanning mechanism 200 to be easily adjusted by sliding the telescopic rod 142 against the fixed rod 141, thereby ensuring the accuracy of the captured fringe images and surface topography information of the turbine blades.

[0046] Furthermore, the central controller 400 includes a control host and a storage unit; the control host is respectively connected to the clamping mechanism 100, the scanning mechanism 200 and the shooting mechanism 300 to obtain stripe images and surface morphology information, and the storage unit is configured to store standard turbine blade information and blade curve information. The control host is connected to the storage unit to compare the stripe images and surface morphology information with the standard turbine blade information and blade curve information.

[0047] Specifically, when inspecting heavy-duty gas turbine blades, the intelligent turbine blade inspection device of this application first emits a laser beam from the laser 211 in the scanning mechanism 200. After passing through the lens array, the laser beam is transformed into projected fringes due to the characteristics of light. The projected fringes are converted by the DMD micromirror 213 into phase-shifted binary fringes and Gray fringes, which are then clearly projected onto the surface of the heavy-duty gas turbine blade. At this point, the high-speed camera 220 collects information about the deformed fringes reflected by the blade. The control host is connected to the high-speed camera 220 via a wire, thereby acquiring information about the deformed fringes reflected by the blade. Simultaneously, the conventional camera 310 in the imaging mechanism 300 simultaneously collects surface topography information of the heavy-duty gas turbine blade being inspected. Conventional camera 310 is also connected to the control host via a wire, enabling the control host to obtain surface topography information of the heavy-duty gas turbine blade. At this point, the control host, equipped with analytical and modeling software, performs analytical and modeling processing to restore the blade's true 3D topography. The storage unit stores standard turbine blade information and blade curve information. The control host is connected to the storage unit through a wire to compare the stripe image and surface morphology information with the standard turbine blade information and blade curve information, thereby analyzing and recording the unique identification number and defect information of the inspected blade.

[0048] Example 2 like Figure 7 As shown, an embodiment of the present invention provides a turbine blade intelligent detection method, which uses the turbine blade intelligent detection device in the above embodiment and includes the following four steps: Step 1: Clamp the turbine blades on the rotating platform 120; Step 2: The fringe projection unit 210 projects a fringe image onto the turbine blade, and the high-speed camera 220 captures the deformed fringe image on the turbine blade; Step 3: The photographing mechanism 300 photographs the surface morphology information of the turbine blade; Step 4: The central processing unit forms a 3D true morphology of the heavy-duty gas turbine blade under test based on the deformed fringe image and surface morphology information, compares it with the data in the database, analyzes and records the unique identification number and defect information of the blade under test.

[0049] Specifically, the first drive member on the rotating platform 120 first drives the ball screw and the pressing head 132 toward the pressure plate 131, allowing the pressing head 132 to press the turbine blade against the pressure plate 131, securing it vertically. Subsequently, the laser 211 in the fringe projection assembly 210 on one side emits a laser beam toward the turbine blade. The laser beam passes through the lens array and micromirror 213, transforming it into a fringe image consisting of phase-shifted binary fringes and Gray fringes. The fringe image deforms according to the turbine blade's shape, and the high-speed camera 220 captures the deformed fringe image on the turbine blade and transmits it to the central processing unit. The conventional camera 310 in the camera mechanism 300 on the other side then captures the surface topography of the turbine blade and transmits it to the central processing unit. After completing a single capture and scan, the rotating platform 120 can be rotated to adjust the angle and position of the turbine blade and perform another capture and scan. Therefore, the central processing unit can combine the surface morphology information with the stripe image, and perform analytical modeling through analytical software and modeling software to restore the true 3D shape of the blade. The stripe image and surface morphology information are then compared with the standard turbine blade information and blade curve information in the database to analyze and record the unique identification number and defect information of the inspected blade.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A turbine blade intelligent detection device, characterized in that: It comprises a clamping mechanism (100), a scanning mechanism (200), a photographing mechanism (300) and a central controller (400); The clamping mechanism (100) comprises a fixed base (110) and a rotating platform (120) arranged on the fixed base (110) and rotatable in a horizontal direction. A clamping assembly is arranged on the rotating platform (120), and the clamping assembly is used to clamp turbine blades. The scanning mechanism (200) is arranged on one side of the fixed base (110), and the scanning mechanism (200) includes a fringe projection group (210) and a high-speed camera (220). The fringe projection group (210) and the high-speed camera (220) are arranged toward the turbine blade. The fringe projection group (210) is configured to project a fringe image onto the turbine blade, and the high-speed camera (220) is configured to capture the deformed fringe image on the turbine blade. The photographing mechanism (300) is arranged on the other side of the fixed base (110), the photographing mechanism (300) is arranged toward the turbine blade, and the photographing mechanism (300) has a conventional camera (310) for photographing surface topography information of the turbine blade; The central controller (400) is fixed to the fixed base (110), and the rotating platform (120), the clamping assembly, the fringe projection group (210), the high-speed camera (220) and the conventional camera (310) are respectively connected to the central controller (400).

2. The intelligent detection device for turbine blades according to claim 1, characterized in that: A fixing groove (121) is provided on the rotating platform (120), and the fixing groove (121) extends in a vertical direction so that the turbine blade can partially extend into the fixing groove (121).

3. The intelligent detection device for turbine blades according to claim 2, characterized in that: The clamping assembly includes a pressure plate (131), a pressure head (132) and a telescopic group (133); The pressure plate (131) is arranged on one side of the fixing groove (121), and the pressure head (132) is arranged on the other side of the fixing groove (121). The telescopic group (133) includes a first driving member and a telescopic member. The pressure head (132) is arranged at one end of the telescopic member close to the pressure plate (131). The first driving member can drive the telescopic member to move toward or away from the pressure plate (131), so that the pressure head (132) can press the turbine blade against the pressure plate (131).

4. The intelligent detection device for turbine blades according to claim 3, characterized in that: A sponge layer is provided on one side of the pressure plate (131) close to the pressure head (132); A sponge layer is provided on the pressure head (132).

5. The intelligent detection device for turbine blades according to any one of claims 1 to 4, characterized in that: The stripe projection group (210) includes a laser (211), a lens array (212) and a micromirror (213); The laser (211), the lens array (212), and the micromirror (213) are arranged linearly with the turbine blades, the laser (211) is configured to emit a laser beam toward the turbine blades, the lens array is configured to convert the laser beam into projection stripes, and the micromirror (213) is configured to convert the projection stripes into stripe images having phase-shifted binary stripes and Gray stripes; The scanning mechanism (200) further comprises a scanning box; The scanning box body comprises an upper box body and a lower box body (232) that are detachably connected. A plurality of first accommodating grooves (233) arranged at intervals in a linear manner are provided in the lower box body (232). The laser (211), the lens array, and the micromirror (213) are sequentially arranged in the first accommodating grooves (233). The upper box body is buckled on the lower box body (232). A scanning channel is provided on a side of the lower box body (232) close to the turbine blades for the stripe image to pass through. A second accommodating groove (234) is further provided in the lower box (232), and the high-speed camera (220) is arranged in the second accommodating groove (234). A collection channel is provided on a side of the lower box (232) close to the turbine blades, and the collection channel, the high-speed camera (220) and the turbine blades are arranged linearly.

6. The intelligent detection device for turbine blades according to claim 5, characterized in that: The photographing mechanism (300) further includes a photographing box (320); A third accommodating groove is provided in the shooting box body (320), the conventional camera (310) is arranged in the third accommodating groove, a shooting channel is provided on a side of the shooting box body (320) close to the turbine blade, and the conventional camera (310), the shooting channel and the turbine blade are arranged linearly.

7. The intelligent detection device for turbine blades according to claim 6, characterized in that: The turbine blade intelligent detection device further comprises a support arm (140) and a sliding plate (150); The support arm (140) is arranged on the fixed base (110) along a vertical direction, and the two support arms (140) are arranged on both sides of the rotating platform (120) in a first horizontal direction. A sliding groove is provided on the top of the support arm (140), and the sliding plate (150) is slidably arranged in the sliding groove along a second horizontal direction, and the first horizontal direction and the second horizontal direction are perpendicular to each other; The shooting box body (320) is arranged on one of the sliding plates (150), and the scanning box body is arranged on the other sliding plate (150).

8. The intelligent detection device for turbine blades according to claim 7, characterized in that: The support arm (140) includes a fixed rod (141), a telescopic rod (142) and a locking member; The fixed rod (141) is fixed to the fixed base (110), the telescopic rod (142) is slidably arranged on the fixed rod (141) along the vertical direction, and the locking member can fix the fixed rod (141) and the telescopic rod (142).

9. The intelligent detection device for turbine blades according to any one of claims 1 to 4, characterized in that: The central controller (400) includes a control host and a storage unit; The control host is respectively connected to the clamping mechanism (100), the scanning mechanism (200) and the shooting mechanism (300) to obtain the stripe image and the surface topography information. The storage unit is configured to store standard turbine blade information and blade curve information. The control host is connected to the storage unit to compare the stripe image and the surface topography information with the standard turbine blade information and the blade curve information.

10. A method for intelligent detection of turbine blades, characterized in that: The intelligent detection device for turbine blades according to any one of claims 1 to 9 comprises: Step 1: Clamp the turbine blade on the rotating platform (120); Step 2: The fringe projection group (210) projects a fringe image onto the turbine blade, and uses a high-speed camera (220) to capture the deformed fringe image on the turbine blade; Step 3: The photographing mechanism (300) photographs the surface morphology information of the turbine blade; Step 4: The central processing unit forms a 3D true morphology of the heavy-duty gas turbine blade under test based on the deformed fringe image and surface morphology information, compares it with the data in the database, analyzes and records the unique identification number and defect information of the blade under test.

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