CN108386323B - Device and method for synchronous detection of damage to fan blades - Google Patents

Abstract

The present invention relates to a kind of fan blade damage sync detection device and methods, described device includes lifting mechanism, propulsive mechanism, synchronization mechanism, mobile mechanism, annulus collecting mechanism, information process unit, synchronization mechanism includes synchronization mechanism matrix, intelligent locking apparatus, and annulus collecting mechanism includes infrared thermoviewer, infrared flashlight driving source regulating system.The described method includes: lifting mechanism by device lift just, raising, it is synchronous with blower that delivery device pushes detection device, annulus collecting mechanism is sent to detection position by mobile mechanism, the height, angle, frequency of infrared flashlight is adjusted in regulating system, infrared thermoviewer acquisition image data is sent to information process unit, the infrared three-dimensional thermography of information process unit building blade is analyzed and determined that device resets, and detection terminates.The present invention has the advantages that realizing fan blade damage on-line synchronous detection, by the infrared three-dimensional thermal imagery map analysis judgement damage of fan blade, detection time is substantially reduced.

Description

Device and method for synchronous detection of damage to fan blades

technical field

The invention belongs to the technical field of fan damage detection, and in particular relates to a fan blade damage synchronous detection device and method.

Background technique

Wind is a pollution-free energy source. Using wind power to generate electricity is very environmentally friendly and can generate huge electrical energy. Therefore, more and more countries pay more attention to wind power generation. As the front-end equipment for converting wind energy into electric energy, the performance of wind turbine blades directly determines the level of conversion efficiency, so it is very important to check its condition regularly.

The fan blade is a thin shell structure made of composite materials, more than 90% of its weight is composed of composite materials, and each generator generally has multiple blades. In the process of transportation and installation of the blade, due to the large size and weight of the blade itself and a certain elasticity, the internal damage of the fan blade will occur. What is more worth noting is that due to the harshness of the working environment and the complex and variable working conditions, the performance of the fan blades changes over time under unfavorable conditions such as sunlight, acid rain, strong wind, natural vibration, sandstorm, salt spray, etc. Degradation occurs until natural cracking, trachoma, surface wear, lightning strike damage, transverse cracks and other failures. Moreover, different degrees of fatigue damage will also occur during operation; if the blades can be regularly maintained on a daily basis, high maintenance costs in the future can be avoided and economic losses caused by downtime can be reduced.

By combining detection and monitoring, accidents can be prevented and avoided. At present, the detection of fan blades can be divided into production quality inspection, service blade presence, and online inspection. Production quality inspection is often the detection of production defects and materials in the production process, which is easy to operate. However, most of the online inspection of blades in service still relies on manual inspection, which has defects such as high risk, low inspection efficiency, high labor intensity, difficult data preservation, and long inspection time. Therefore, the online inspection of service blades has gradually received more and more attention. With the improvement of non-destructive testing technology, it is possible to combine non-destructive testing with advanced mechanical devices, and use different non-destructive testing technologies to design different in-situ testing of blades in service. Commonly used non-destructive testing technologies for fan blades include: ultrasonic, acoustic emission, X-ray, infrared thermal imaging and other testing technologies. However, each detection method has its own advantages and limitations of use, and there is no perfect standard to specify the applicable stage of the detection method. For example, the authorized publication number CN204961177U, the patent document published on January 13, 2016, discloses a fan blade detection device, which is a real-time detection device for fan blades using active infrared thermal imaging technology. The detection device is characterized by detecting Before manually setting the parameters of the detection and lighting units to the best state; for example, the patent document with application publication number CN107063602A, published on August 18, 2017, discloses a fan blade mechanical damage detection device, which is based on image analysis. Digital image processing can accurately identify damaged blade parts with a highly intelligent detection device, which solves the problems of inconvenience, inaccurate detection, low intelligence, poor practicability and complex structure of existing wind turbine blades. and other shortcomings; such as application publication number CN106501280A, the patent document published on March 15, 2017 discloses an online detection device and detection method for fan blades based on laser ranging. The contact detection technology can effectively monitor the condition of the blade and find the fault in time. However, the above-mentioned in-service detection of the fan blades can only realize the static detection of the fan blades, and the static detection time is too long, which brings considerable economic losses and other problems. Therefore, it has important engineering application value and practical significance to study a device suitable for on-line detection of fan blades in service. Authorized announcement number CN20483211U, the patent document published on December 2, 2015 discloses a wind turbine blade detection device in operation in a wind farm. The detection device uses the principle of a sound phase meter to receive fans through sound source receiving equipment. The sound made by the blades when the generator rotates, and the damage status of the blades is detected through timely data processing. The device solves the technical problem of not having a maintenance device that can detect the damage status of the blades of the wind turbine in a timely and accurate manner, and can be placed away from the wind turbine. Check the running fan on the ground with a certain distance. However, the device is largely affected by the surrounding medium environment, which affects the imaging quality, and does not take into account that when the wind direction changes, the fan will also rotate circumferentially with the wind direction, so the premise that the detection device is placed on the windward side Conditions will change, making the detection error larger.

Therefore, the damage detection of fan blades should not only meet the online detection in service, but also adapt to the change of wind direction, so that the detection of blades can be well completed, showing very intuitive defects.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a fan blade damage synchronous detection device and method, which can realize the online detection of fan blades. The thermal image of the blade in different directions is collected by the ring collection mechanism, and the infrared three-dimensional thermal image of the fan blade is constructed by the information processing unit. The damage of the blade can be visually displayed in the three-dimensional thermal image. In this way, the collection of thermal images can be completed, which can reduce the economic loss caused by the long downtime detection time. The detection device can automatically adjust the angle and height of the excitation source of the infrared flash lamp according to the curved surface of different parts of the fan blade, which will reduce the acquisition error caused by the large spatial gradient and poor uniformity of the temperature field, and adjust the excitation source according to the thickness of different parts of the blade. frequency, which can reduce the missed detection of deep damage due to improper excitation.

The technical scheme adopted in the present invention: a synchronous detection device for fan blade damage, including a lifting mechanism, a propulsion mechanism, a synchronization mechanism, a moving mechanism, a ring collecting mechanism, and an information processing unit; the lifting mechanism is composed of a lifting module and a box-shaped ellipse. The hoisting mechanism is connected with the propulsion mechanism; the propulsion mechanism is movably connected with the synchronizing mechanism; the synchronizing mechanism is equipped with multiple sets of moving mechanisms, which are respectively the same as the number of fan blades; the moving mechanism is equipped with a moving table; Ring collection mechanism connection.

The lifting mechanism of the fan blade damage synchronous detection device is composed of a lifting module and a box-shaped elliptical telescopic arm, and the lifting module is to lift the detection device from the initial position parallel to the ground to the vertical position of the parallel fan tower. Position, the box-type elliptical telescopic arm is to lift the detection device to the synchronization mechanism base with the axis coincident with the axis of the fan hub shell; the lifting mechanism is composed of a lifting module and a box-shaped elliptical telescopic arm. The lifting module It includes a triangular arm, a tie rod and a hydraulic cylinder assembly; the triangular arm and the tie rod are symmetrically arranged, the lower end of the triangular arm is hinged with the front end of the base, the lower end of the tie rod is hinged with the upper end of the triangular arm, and the upper end of the tie rod is hinged with the box The upper end of the hydraulic cylinder assembly is hinged with the box-shaped elliptical telescopic arm, and the lower end is hinged with the middle of the triangle arm. The sum of the elongation length and the nesting length, the nested part of the single-section telescopic boom in the previous telescopic boom is selected according to the principle of minimum lap length, and the elongation is determined according to the elastic modulus and Poisson's ratio of the selected material. Selected, the box-shaped elliptical telescopic arm is connected to the propulsion mechanism. The propulsion mechanism is composed of a set of hydraulic system, which pushes the detection device along the axis direction of the fan hub shell, and triggers the intelligent locking device when the push mechanism retracts.

The synchronous mechanism of the fan blade damage synchronous detection device is a mechanism for synchronizing the detection device with the fan. The degree of freedom is constrained by the synchronous base concave structure that cooperates with the fan hub shell and the blade root of the blade, and the axial degree of freedom is constrained by an intelligent locking device, which includes a lock tongue, a transmission mechanism, and a deceleration mechanism. , drive motor, trigger module; the trigger module includes a pressure sensor, a pressure ball, and a pressure spring, wherein the average helix diameter of the pressure spring is smaller than the diameter of the pressure ball; multiple groups of trigger modules are connected by an OR circuit to prevent damage to a single trigger module. The whole detection device works normally.

The moving mechanism of the fan blade damage synchronous detection device is a precision mechanical device that converts the rotary motion of the motor into the linear motion of the worktable through the ball screw mechanism, and the ball screw makes the detection of each section of the blade very closely connected , the detection process is very stable, because the ball screw has the reversibility of transmission, so after the detection is completed, the use of fast rewind, the use of this high-precision mechanical device will greatly reduce the detection error.

The described ring collection mechanism of a fan blade damage synchronous detection device includes a plurality of infrared imagers, an infrared flash lamp excitation source adjustment system and a ring base. The infrared flash lamp excitation source adjustment systems are evenly arranged on the annular base, and a plurality of infrared imagers are evenly distributed on the annular base between the infrared flash excitation source adjustment systems.

The described circular ring collection mechanism of the fan blade damage synchronous detection device, wherein the excitation source is an infrared light bulb, because the infrared light has high thermal conversion efficiency, high heating efficiency, and high startup efficiency, and can achieve the highest radiation in a relatively short period of time. value, will not cause the effect of continued radiation after the bulb is turned off.

The described infrared flash lamp excitation source of the fan blade damage synchronous detection device, a single pulse infrared flash excitation source produces a temperature field on the surface of the inspected workpiece, which has the characteristics of decreasing around the corresponding point of the excitation source, and even sets of pulse infrared The flash excitation source heats the workpiece at the same time, and the radiation of the pulsed infrared flash excitation source will be superimposed on each other, which can reduce the temperature of the thermal wave generated by the pulsed infrared flash excitation source. In the same way, if four, six or more pulsed infrared flash excitation sources are used for regular arrangement, it will not only greatly improve the spatial range and primary detection area of thermal wave radiation, but also improve the time gradient of temperature rise. It is more effective to reduce the spatial gradient, which is conducive to the detection of internal defects of the object and improves the detection efficiency.

The described infrared flash lamp excitation source adjustment system of the fan blade damage synchronous detection device adjusts the height and angle of the excitation source to make the excitation source adapt to the curved surface changes of different parts of the measured blade, so that the distance between the excitation source and the blade is kept within Within the range of 550mm-650mm; adjust the excitation frequency of the excitation source to adapt to the changes in the thickness of different parts of the blade.

The described infrared flash lamp excitation source adjustment system of the fan blade damage synchronous detection device, the height and angle adjustment device includes a distance and angle detection module, a microprocessor module, a steering gear, and an electric telescopic rod, and the distance and angle detection module converts the infrared The distance between the flash excitation source and the detection surface and the real-time angle parameters of the steering gear are transmitted to the microprocessor module. After analysis and calculation by the processor, the optimal adjustment parameters of the excitation are obtained. By adjusting the steering gear and the lightweight electric telescopic rod, the excitation source is improved. On the one hand, the above shortcomings can be greatly improved, and on the other hand, the spatial range and primary detection area of thermal wave radiation can be improved.

The infrared flash lamp excitation source adjustment system of the fan blade damage synchronous detection device adjusts the excitation frequency, the frequency adjustment device includes an arbitrary signal generator and an amplifier, and the information processing unit selects an appropriate blade thickness parameter according to the blade thickness parameter in the blade database. The frequency sends the command to the arbitrary signal generator, and the arbitrary signal generator sends the signal to the infrared flash excitation source through the amplifier. By using the infrared flash excitation source of different frequencies to match the thickness of different parts of the fan blade, different excitation frequencies can be used. Detecting damage at different depths, when the frequency is high, is beneficial for detecting surface damage. When the frequency is low, deep damage can be detected, and two-dimensional infrared thermal imaging images in different directions can be provided for three-dimensional thermal imaging.

For the selected material of the synchronous detection device for damage of fan blades, the mentioned mechanism adopts high-strength and light-weight materials with bending and compressive strengths above 500Mpa and relative density between 1.0-1.5; the multiple groups of moving mechanisms , The number of the annular set mechanism is the same as the number of fan blades.

A method for using a fan blade damage synchronous detection device, characterized in that it mainly comprises the following steps:

(1) The first step:

Lifting mechanism startup: The lifting module of the lifting mechanism is activated, and the lifting angle of the lifting module is lifted from 0° to 90°, so that the detection device is lifted from the initial position parallel to the ground to the vertical position parallel to the fan tower. The box-shaped elliptical telescopic arm extends, and when the centering detection module located on the central axis of the synchronizing mechanism detects that the central axis of the synchronizing mechanism base body coincides with the axis of the fan hub shell, the box-shaped elliptical telescopic arm stops extending;

(2) The second step:

The synchronization of the detection device: the hydraulic rod of the propulsion mechanism is extended, and the detection device is pushed along the axis of the fan hub shell. When the fan hub shell triggers the sensor at the bottom of the groove of the synchronization mechanism, the push mechanism stops pushing, and the radial lock is completed when the synchronization mechanism is completed. The hydraulic rod of the propulsion mechanism executes the recovery command, and at the same time triggers the intelligent locking device to perform axial locking, and finally the synchronization mechanism completes the radial and axial constraints of the combined body;

(3) The third step:

The operation of the moving mechanism: The detection moving mechanism transmits the ring collecting mechanism from the end of the initial moving mechanism to the tip of the fan blade, and the moving mechanism is driven in the direction of the blade root within a single feeding range of 285mm-400mm until it reaches the blade. leaf root;

(4) The fourth step:

Adjustment of the excitation source: The moving mechanism drives the detection mechanism to the static position of the detection part, and the electric telescopic rod and the steering gear of the infrared flash lamp excitation source adjustment system adjust the height and angle of the excitation source, and the excitation source changes with the curved surface of the fan blade. Adjust to keep the distance between the excitation source and the blade in the range of 550mm-650mm, and the excitation time is 30s; according to the thickness parameter of the blade loaded before the information processing unit detects, the information processing unit generates any signal from the infrared flash lamp excitation source adjustment system. The generator sends data, and the arbitrary signal generator transmits the signal to the excitation source of the infrared flash lamp through the amplifier, so that the excitation frequency can adapt to the thickness change of different parts of the blade;

(5) Step 5:

Acquisition of infrared thermal image: Multiple groups of infrared imagers on the ring acquisition mechanism complete the acquisition of infrared two-dimensional thermal images of the same part of the blade in multiple directions. The sampling frequency of the infrared imager is set to 5Hz-10Hz, and the acquisition time is 90s, the collected leaf image data is sent to the information processing unit;

(6) The sixth step:

The information processing unit processes information: the third, fourth, and fifth steps of the above steps are repeated to the blade root, and the information processing unit constructs an infrared three-dimensional thermal image of the blade according to the received image data, and analyzes and judges the damage of the blade;

(7) Step 7:

Device reset: the ring detection mechanism is fast-retracted to the initial position at the end of the mobile mechanism by the mobile mechanism, the hydraulic rod of the propulsion mechanism is extended to the matching hole of the synchronization mechanism to trigger the intelligent locking device to unlock, the detection device is retracted, and the lifting mechanism passes through The box-shaped elliptical telescopic arm and lifting module reset the detection device to the initial horizontal position.

The beneficial effect of the invention lies in the online detection of the fan blades; the different curved surfaces and thicknesses of the fan blades are different, and the detection device has an excitation source adjustment system that adapts to the changes of the curved surfaces and thicknesses of the blades; it can realize the construction of an infrared three-dimensional thermal image of the wind blades , through the three-dimensional infrared thermal image, the defect can be found visually and intuitively; it has the advantages of high degree of automation, strong adaptability, and high detection efficiency.

Description of drawings

FIG. 1 is a schematic diagram of the overall assembly of the present invention.

FIG. 2 is a schematic diagram of the ring collecting mechanism of the present invention.

FIG. 3 is a schematic diagram of the synchronization mechanism of the present invention.

FIG. 4 is a partial schematic diagram of the triggering module of the synchronization mechanism of the present invention.

FIG. 5 is a schematic diagram of the propulsion mechanism of the present invention.

FIG. 6 is a schematic diagram of the hoisting mechanism of the present invention.

FIG. 7 is a flow chart of the use method of the present invention.

Detailed ways

The embodiments of the present invention will be described in detail below with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects.

As shown in Figure 1, it is a schematic diagram of the overall assembly of a fan blade damage synchronization detection device, including a lifting mechanism 1, a propulsion mechanism 2, a synchronization mechanism 3, a moving mechanism 4, a ring collecting mechanism 5, a moving table 6, and a coupling piece 7. Information processing unit 8; the hoisting mechanism 1 is connected with the propulsion mechanism 2; the propulsion mechanism 2 is movably connected with the synchronizing mechanism 3; the synchronizing mechanism 3 is equipped with a plurality of groups of moving mechanisms 4 which are respectively connected with the fan The number of blades is the same; the moving mechanism 4 is equipped with a moving table 6 ; the moving table 6 is connected with the ring collecting mechanism 5 through a coupling 7 .

As shown in FIG. 2 , the ring acquisition mechanism 5 includes an infrared thermal imager 51, an infrared flash lamp excitation source adjustment system 52, a ring base 53, and the infrared flash lamp excitation source adjustment system 52 includes an infrared excitation source flash lamp 521, a distance and angle detection module 522, excitation source support 523, steering gear 524, electric telescopic rod 525, arbitrary signal generator 526, amplifier 527, annular base 53; the infrared flash lamp excitation source 521 is fixed on the excitation source support 523, and the excitation source The radial angle and the axial direction of the support 523 are respectively connected with the excitation source support 523 by the steering gear 524, the telescopic end of the electric telescopic rod 525, and the infrared camera 51 and the electric telescopic rod 525. The fixed end is fitted on the inner side of the annular base body 53 , and the annular base body 53 is linked with the workbench 6 through the connecting piece 7 .

As shown in FIG. 3 , the assembly schematic diagram of the synchronizing mechanism 3 includes the synchronizing mechanism base 31 , the intelligent locking device 32 , the sensor 33 , and the centering detection module 34 . The synchronizing mechanism 3 will detect the The device is locked with the fan, the synchronizing mechanism base 31 is radially constrained by the fan blade concave structure matched with the fan hub shell, and the intelligent locking device 32 completes the axial constrained locking; the centering detection device detects the synchronization mechanism base. The axis of the fan hub shell coincides, and the sensor sensing push mechanism pushes and detects in place; the intelligent locking device 32 includes a lock tongue 321, a trigger module 322, a deceleration mechanism 323, a drive motor 324, a controller 325, and a transmission mechanism 326; as shown in Figure 4, A partial schematic diagram of the triggering module 322 of the synchronization mechanism, the triggering module includes a pressure sensor 3221, a pressure spring 3222, and a pressure ball 3223, the average helical diameter of which is smaller than the diameter of the ball; multiple groups of triggering modules 322 are connected by an OR gate circuit; the triggering module 322 triggers The rotation of the drive motor 324, the speed reduction mechanism 323 completes the power transmission between the drive motor 324 and the transmission mechanism 326, and the transmission mechanism 326 drives the lock tongue 321 to execute the intelligent locking device 32. switch.

As shown in FIG. 5 , the propulsion mechanism 2 is an intermediate connection mechanism between the mechanism hoisting mechanism 1 and the synchronizing mechanism 3 , and the opening and closing of the intelligent locking device 32 of the synchronizing mechanism 3 is controlled by the expansion and contraction of the hydraulic rod. .

As shown in FIG. 6 , the hoisting mechanism of the hoisting mechanism 1 includes a hoisting module 11 , a box-shaped elliptical telescopic arm 12 , and a base 13 . The hoisting module includes a triangular arm 111 , a pull rod 112 , and a hydraulic cylinder assembly 113. The box-shaped elliptical telescopic arm 12 is formed by sleeves of multi-section arms; the triangular arm 111 and the pull rod 112 are arranged symmetrically, the lower end of the triangular arm 111 is hinged with the front end of the base 13, and the lower end of the pull rod 112 is connected with the triangular arm The upper end of the 111 is hinged, the upper end of the pull rod 112 is hinged with the box-shaped elliptical telescopic arm 12 , the upper end of the hydraulic cylinder assembly 113 is hinged with the box-shaped elliptical telescopic arm 12 , and the lower end is hinged with the middle of the triangular arm 111 .

As shown in Figure 7, the steps of the method for using the fan blade damage synchronous detection device:

first step:

The lifting process of the lifting mechanism: the lifting module 11 of the lifting mechanism 1 is activated, and the lifting angle of the lifting module 11 is lifted from 0° to 90°, so that the box-shaped elliptical telescopic arm 12 is lifted from the initial position parallel to the ground. Raised to the vertical position of the parallel fan tower, the box-shaped elliptical telescopic arm 12 is extended, and when the centering detection module 33 located on the central axis of the synchronizing mechanism 3 detects the coincidence of the central axis of the synchronizing mechanism base 31 and the axis of the fan hub shell , the box-shaped elliptical telescopic arm 12 stops extending.

Step 2:

The process of synchronization of the detection device: the hydraulic rod of the propulsion mechanism 2 is extended, and the detection device is pushed along the axial direction of the fan hub shell. When the fan hub shell triggers the sensor 33 at the bottom of the groove of the synchronization mechanism, the push mechanism 2 stops pushing, and the push mechanism is pushed during the push process. The extension end of 2 is always in contact with the pressure ball 3223 of the synchronization mechanism 3, and the lock tongue 321 of the intelligent locking device 32 is in an unlocked state; when the fan hub shell triggers the sensor 33 at the bottom of the groove of the synchronization mechanism, the push mechanism 2 stops pushing, and at the same time The smart locking device 32 is triggered, the pressure spring 3222 bounces the pressure ball 3223 back, the pressure sensor 3221 transmits the pressure signal at this time to the controller 325 , the controller 325 controls the drive motor 324 to rotate, and the deceleration mechanism 323 drives the power of the drive motor 324 It is transmitted to the transmission mechanism 326, the lock tongue 321 of the intelligent locking device is closed, and finally the synchronization mechanism 3 completes the radial and axial constraints on the detection device and the fan.

third step:

The movement of the moving mechanism: the movement of the table 6 is driven by the ball screw mechanism. The moving mechanism 4 transfers the ring collecting mechanism 5 from the end of the initial moving mechanism 4 to the tip of the fan blade. The moving mechanism 4 is 285mm-400mm. The distance of the single feed range is driven in the direction of the blade root until it reaches the blade root.

the fourth step:

The process of adjusting the height and angle of the excitation source by the infrared flash lamp excitation source adjustment system: the distance and angle detection module 522 transmits the distance between the infrared flash lamp excitation source 521 and the detection surface and the real-time angle parameter of the steering gear 524 to the processing unit 8, and the The height and angle of the excitation adjustment are obtained through analysis and calculation, and the distance between the infrared flash excitation source 521 and the measured fan blade is adjusted through the electric telescopic rod 525 through the steering gear 524 and the electric telescopic rod 525 of the infrared flash lamp excitation source adjustment system 52 To 550mm-650mm, by adjusting the angle of the steering gear 524 to change the overlapping area between the infrared flash excitation sources 524, the infrared flash excitation adjustment system 52 is used to improve the temperature field between the infrared flash excitation sources 521 due to the angle and height. The disadvantages of large spatial gradient and poor uniformity, on the one hand, can greatly improve the above shortcomings, on the other hand, it can improve the spatial range and primary detection area of thermal wave radiation.

The process of adjusting the excitation frequency by the infrared flash lamp excitation source adjustment system: the information processing unit 8 selects the appropriate excitation frequency through the thickness parameter of the blade in the database, and the information processing unit 8 sends an instruction of the required frequency to the arbitrary signal generator 526, and the arbitrary signal generator 526 sends the signal to the amplifier 527, and the amplifier 527 transmits the final signal to the infrared flash lamp excitation source 521, and the excitation frequency of the infrared flash lamp excitation source 521 is adapted to the thickness of the measured fan blade, so that the image collected by the infrared thermal imager 51 can be adjusted. The thermal image is a two-dimensional thermal image of damage at different thickness parts.

the fifth step:

Collection of infrared thermal images: Multiple groups of infrared imagers on the ring collection mechanism 5 complete the collection of infrared two-dimensional thermal images of the same part of the blade in multiple directions. The sampling frequency of the infrared imagers is in the range of 5Hz-10Hz. The time is 90s, and the collected leaf image data is sent to the information processing unit 8 .

Step 6:

Through the digital image processing algorithm of the information processing unit 8 image processing unit, these thermal images are processed and identified at the pixel level, and a large number of characteristics are found; the matching algorithm is used to match a large number of characteristics on different thermal images to find out the different Which points on the thermal image are the same point; construct the scene coordinate system, invert and calculate the acquisition position and angle (three-dimensional) corresponding to each thermal image by solving higher-order equations, that is, for each thermal image The thermal imager is positioned during shooting; finally, according to the relative spatial coordinates and direction of the thermal imager and the data of the points with the same name, the spatial three-dimensional coordinates of all the points with the same name are obtained by the metrology algorithm; a large number of points with the same name form a point cloud, and then the points are connected. Finally, the thermal image is pasted on the surface to form an infrared three-dimensional thermal image model, so that the size and position of the damage of the blade can be displayed very intuitively.

Step 7:

Device reset process: the moving mechanism 4 rewinds the ring collecting mechanism 5 to the initial position at the end of the moving mechanism 4, the propulsion mechanism 2 is extended to trigger the intelligent locking device 32 in the matching hole with the synchronization mechanism 3 to unlock, and the detection device is retracted. The lifting mechanism 1 starts from the box-shaped elliptical telescopic arm 12 and the lifting module 11 resets the detection device to the initial horizontal position.

Claims (9)

1. a kind of fan blade damages sync detection device, which is characterized in that including lifting mechanism, propulsive mechanism, synchronization mechanism, Mobile mechanism, annulus collecting mechanism, information process unit；The lifting mechanism is by lifting module and box elliptic telescopic arm group At the lifting mechanism is connect with the propulsive mechanism；The propulsive mechanism is flexibly connected with synchronization mechanism；The synchronization mechanism Upper that multiple groups mobile mechanism is housed, mobile mechanism's number is identical as fan blade number；The mobile mechanism is equipped with mobile work platform； The mobile work platform is connect with annulus collecting mechanism；Information process unit is with annulus collecting mechanism by being wirelessly attached.

2. a kind of fan blade according to claim 1 damages sync detection device, which is characterized in that the synchronization mechanism Including synchronization mechanism matrix, intelligent locking apparatus；The intelligent locking apparatus includes lock tongue, transmission mechanism, deceleration mechanism, driving Motor, multiple groups trigger module；The multiple groups trigger module includes pressure sensor, pressure ball, compression spring, wherein the pressure Spring average helical diameter is less than the diameter of pressure ball；The trigger module is connected using OR circuit；The trigger module touching The rotation for sending out driving motor described, the deceleration mechanism realize that the power between the driving motor and the transmission mechanism passes Defeated, the transmission mechanism drives lock tongue to execute the switch of intelligent locking apparatus；The planform of the synchronization mechanism matrix is about Beam the radial freedom degree of detection device and blower；The planform of the synchronization mechanism matrix will test with intelligent locking apparatus Device is together with blower Complete Bind, so that device detection is synchronous with fanman's work arrival.

3. fan blade according to claim 1 damages sync detection device, which is characterized in that the annulus collecting mechanism Including infrared thermoviewer, infrared flashlight driving source regulating system and annulus matrix, wherein infrared thermoviewer, infrared flashlight swash Encouraging source regulating system quantity is multiple groups；It is uniformly placed on annulus matrix between the infrared flashlight driving source regulating system, The infrared thermoviewer is uniformly distributed in the annulus matrix between the infrared flashlight driving source regulating system；The infrared sudden strain of a muscle Light lamp driving source regulating system carries out height, angle, frequency to infrared flashlight and adjusts；The regulating system is to height, angle Regulating device include distance and Angle Measurement Module, microprocessor module, driving source support, steering engine, electric telescopic rod；It is described Distance is located on driving source support with Angle Measurement Module, and the axial length and radial angle of the driving source support are respectively by institute It states electric telescopic rod and the steering engine is adjusted, the telescopic end of the electric telescopic rod is connect with the driving source support, described red The fixing end of outer thermal imaging system and the electric telescopic rod cooperates and is mounted on the annulus matrix；The regulating system is to frequency Regulating device include arbitrarily signal generating device, amplifier, the input terminal of the arbitrarily signal generating device and the information processing Unit connection, output end are connect with the amplifier, and the amplifier other end is connect with the infrared flare driving source；It is described Annulus matrix is connected by chaining part and the workbench of mobile mechanism；The reception and transmitting of above equipment information are all by wireless To complete transmission.

4. fan blade according to claim 1 damages sync detection device, which is characterized in that the propulsive mechanism is stretched Contracting controls the locking of the synchronization mechanism.

5. fan blade according to claim 1 damages sync detection device, which is characterized in that the mobile mechanism uses Ball screw framework converts the rotary motion of motor in the precision machinery device of workbench linear motion.

6. a kind of fan blade according to claim 1 damages sync detection device, which is characterized in that the lifting mechanism It is made of lifting module and box elliptic telescopic arm, the lifting module includes Triangular Arm, pull rod, hydraulic cylinder assembly；Triangle Arm is to be arranged symmetrically with pull rod, and the Triangular Arm lower end and pan frontward end are hinged, on the pull rod lower end and the Triangular Arm End is hinged, and the pull rod upper end and the box elliptic telescopic arm are hinged, the upper end of the hydraulic cylinder assembly and the box Elliptic telescopic arm is hinged, hinged described box elliptic telescopic arm single-unit telescopic arm overall length etc. in the middle part of lower end and the Triangular Arm In the sum of single-unit extended length and nested lengths, nested parts of the single-unit telescopic arm in previous section telescopic arm are overlapped according to minimum Length principle is chosen, and elongation selectes according to the elasticity modulus of selected materials with Poisson's ratio；The box elliptic is flexible Arm upper end connects propulsive mechanism.

7. fan blade according to claim 1 damages sync detection device, which is characterized in that the information process unit In include the infrared three-dimensional thermography unit of two-dimensional infrared thermography building, driving source parameter processing unit.

8. a kind of fan blade according to claim 1 damages sync detection device, which is characterized in that the mechanism is adopted With bending and compressive strength in 500Mpa or more, high strength light material of the relative density between 1.0-1.5；The multiple groups Mobile mechanism, the quantity of the annulus collecting mechanism are identical as the quantity of fan blade.

9. a kind of application method of fan blade damage sync detection device, characterized in that mainly comprise the steps that

(1) step 1:

Lifting mechanism starting: the lifting module starting of lifting mechanism, the lifting angle for lifting module is lifted to 90 ° by 0 °, so that inspection The vertical position that device is lifted to parallel blower tower from the initial position on parallel ground is surveyed, box elliptic telescopic arm extends, to Centering detection module on synchronization mechanism central axes detects synchronization mechanism matrix central axes and axial fan hub housing axis When coincidence, box elliptic telescopic arm stops elongation；

(2) step 2:

The synchronization of detection device: the hydraulic stem elongation of propulsive mechanism pushes detection device along axial fan hub housing axis direction, to Axial fan hub shell triggers the sensor of synchronization mechanism bottom portion of groove, and delivery device stops push, and synchronization mechanism completes diameter at this time To locking, the hydraulic stem of propulsive mechanism executes recovery command, while triggering intelligent locking apparatus and carrying out axial locking, final synchronous Mechanism reaches the radial constraint with axial direction of combination；

(3) step 3:

Mobile mechanism's operation: annulus collecting mechanism is sent to fan blade by initial mobile mechanism end by detection mobile mechanism Wing tip at, mobile mechanism is driven apart from interior to blade root direction with the single feed range of 285mm-400mm, until be transmitted to leaf Piece blade root；

(4) step 4:

The adjusting of driving source: it is static to detection position that mechanism to be moved will test mechanism driving, and infrared flashlight driving source is adjusted System is adjusted height, the angle of infrared flashlight driving source by electric telescopic rod and steering engine, infrared flashlight excitation Source is adjusted with the curved surface variation of fan blade, and infrared flashlight driving source is made to be maintained at 550mm- with a distance from blade Within the scope of 650mm, actuation duration 30s；The thickness parameter for the blade being loaded into before being detected according to information process unit, information processing Unit sends data to the arbitrarily signal generating device of infrared flashlight driving source regulating system, and arbitrarily signal generating device is through amplifier Infrared flashlight driving source is sent a signal to, driving frequency is made to adapt to the thickness change of blade different parts；

(5) step 5:

The acquisition of Infrared Thermogram: the same position that the multiple groups infrared thermoviewer on annulus collecting mechanism completes blade is multidirectional The acquisition of infrared two dimension thermography, the sample frequency of infrared thermoviewer is within the scope of 5Hz-10Hz, acquisition time 90s, acquisition Obtained leaf image data transmission is to information process unit；

(6) step 6:

Information process unit handle information: circulation above-mentioned steps third and fourth, five steps to blade root, information process unit according to The obtained infrared three-dimensional thermography of image data building blade is received, and blade injury is analyzed and determined；

(7) step 7:

Device resets: annulus collecting mechanism is retreated to the initial position of mobile mechanism end fastly by mobile mechanism, propulsive mechanism Hydraulic stem, which is extended to synchronization mechanism matching hole internal trigger intelligent locking apparatus, unlocks, and withdraws detection device, lifting mechanism passes through Box elliptic telescopic arm and lifting module will test device and reset in initial horizontal position.