Automatic inspection system for inner cavity web of wind power blade

Abstract

The utility model discloses an automatic inspection system for a wind power blade inner cavity web, and belongs to the technical field of wind power blade detection. Comprising a detection end, and the detection end comprises a transmitting-receiving integrated probe for transmitting terahertz waves and collecting reflected signals; the terahertz detection assembly is connected with the receiving and transmitting integrated probe, the terahertz detection assembly generates terahertz signals, the terahertz signals are transmitted to the receiving and transmitting integrated probe, and the terahertz detection assembly receives reflected signals and outputs detection images; and the carrying end comprises a moving assembly, carries the receiving and transmitting integrated probe and the terahertz detection assembly, and moves in the wind power blade along the detection path. The technical scheme has the beneficial effects that due to the adoption of the technical scheme, the interior of the wind power blade is subjected to nondestructive detection through terahertz waves, the use is convenient, and the detection accuracy is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to wind power blade detection technical field, concretely relates to an automatic inspection system. BACKGROUND

[0002] In the wind turbine, referring to Figure 1 , the length of the wind power blade 4 can reach 50 meters, 70 meters or even longer, and the bonding area of the blade web almost runs through the whole blade. This bonding area is a key connecting part in the blade structure, which bears complex load and environmental influence. Due to the complexity of the bonding process and its invisibility, various defects such as debonding, bubbles and delamination may occur in the bonding area. If these defects are not discovered and repaired in time, it may lead to failure of the blade structure, and even cause serious safety accidents.

[0003] Currently, there are multiple detection areas 41 in the wind power blade 4. Although various non-destructive testing techniques such as ultrasonic testing, radiographic testing and infrared thermal imaging testing have been used in ground quality inspection, these techniques still have many limitations in the detection after high-altitude installation construction is completed and after the blade has been operated for a period of time. The ultrasonic testing technique needs to use liquid couplant to ensure the effectiveness of the detection. However, the cost required for transporting the couplant from the ground to the high altitude is relatively high. The radiographic testing has radiation hazards, which may pose a potential threat to the health of the detection personnel. Moreover, the radiographic testing equipment is usually bulky, which makes it difficult to operate flexibly in the high-altitude environment. The infrared thermal imaging testing is extremely sensitive to environmental temperature changes. In the complex high-altitude environment, the temperature fluctuation is large, which may affect the accuracy of the detection results. SUMMARY

[0004] The purpose of the utility model is to provide an automatic inspection system for the inner cavity web of a wind power blade, which solves the above technical problems.

[0005] The automatic inspection system for the inner cavity web of a wind power blade comprises,

[0006] a detection end,

[0007] a transceiving integrated probe that transmits terahertz waves and collects reflected signals,

[0008] a terahertz detection assembly connected to the transceiving integrated probe, which generates terahertz signals, transmits the terahertz signals to the transceiving integrated probe, receives the reflected signals and outputs a detection image,

[0009] a carrying end comprising a moving assembly that carries the transceiving integrated probe and the terahertz detection assembly and moves along a detection path in the wind power blade.

[0010] Preferably, the terahertz detection assembly comprises,

[0011] A power board is connected to the power supply;

[0012] A voice coil motor driving board is connected to the power board;

[0013] A delay line is connected to the voice coil motor driving board;

[0014] A laser is connected to the power board and the delay line.

[0015] Preferably, the terahertz detection assembly further comprises,

[0016] A collection card is connected to the transceiver integrated probe;

[0017] A wireless transmitter is connected to the collection card.

[0018] Preferably, the moving assembly comprises a carrying platform and an actuator located below the carrying platform.

[0019] Preferably, the moving assembly further comprises a laser guiding device located on the side of the carrying platform, which guides the detection path.

[0020] Preferably, the surface of the carrying platform is provided with a sliding rail, and the bottom of the terahertz detection assembly is provided with a sliding block movably arranged in the sliding rail.

[0021] Preferably, the inside of the carrying platform is provided with a camera for shooting the surrounding environment image.

[0022] Preferably, the detection end further comprises a communication converter connected to the terahertz detection assembly.

[0023] Preferably, it further comprises a control end, which comprises a control panel for displaying the detection image, and the control end is connected to the detection end and the carrying end.

[0024] Preferably, the control end further comprises a remote controller for driving the actuator to turn and move.

[0025] The beneficial effects of the present application are: by using the above technical scheme, the terahertz wave is used for non-destructive testing of the internal part of the wind turbine blade, which is convenient to use and has high detection accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a sectional view of the prior art wind turbine blade;

[0027] Figure 2 is a structural schematic view of the wind turbine blade internal cavity web automatic inspection system of the present application;

[0028] Figure 3 The utility model discloses a connection block diagram of the automatic inspection system of wind power blade inner cavity web.

[0029] In the drawing: 1, detection end; 11, transceiving integrated probe; 12, terahertz detection component; 121, power panel; 122, voice coil motor drive board; 123, delay line; 124, laser; 125, acquisition card; 126, wireless transmitter; 127, communication converter; 2, carrying end; 21, moving component; 211, carrying platform; 212, actuating mechanism; 213, laser guiding device; 214, slide rail; 215, camera; 3, control end; 31, control panel; 32, remote controller; 4, wind power blade; 41, detection area; 5, power supply. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model will be apparently and completely described in connection with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts fall within the protection scope of the utility model.

[0031] It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0032] The utility model will be further described in connection with the drawings and specific embodiments, but not as the limitation of the utility model.

[0033] The automatic inspection system of wind power blade inner cavity web, as shown in Figure 2 , Figure 3 , includes,

[0034] Detection end 1, detection end 1 includes,

[0035] Transceiving integrated probe 11, emits terahertz wave and gathers reflection signal;

[0036] Terahertz detection component 12 is connected transceiving integrated probe 11, and terahertz detection component 12 generates terahertz signal, and the terahertz signal is transmitted to transceiving integrated probe 11, and terahertz detection component 12 receives reflection signal and outputs detection image;

[0037] Carrying end 2, carrying end 2 includes moving component 21, carries transceiving integrated probe 11 and terahertz detection component 12, and moves in wind power blade 4 along detection path.

[0038] Specifically, the utility model provides wind power blade inner chamber web automatic inspection system, terahertz wave (100GHz~10THz) is in the special position in electromagnetic spectrum, has the characteristics of microwave and optics both, has certain penetration ability and higher resolution. Especially terahertz radiation has good penetration to glass fiber material, and single photon energy is low, will not produce harm to material. 70% wind power blade 4's web is by glass fiber material processing, therefore terahertz imaging technology is very suitable for the detection of wind power blade 4's web bonding area.

[0039] Transceiving integrated probe 11 is used to emit and receive terahertz wave. Wind power blade web bonding area main material is glass fiber, after its terahertz wave transmission material, will produce reflection in the material inside different glass fiber cloth surface, and probe gathers reflection signal simultaneously. When having defect, reflection signal will have difference with normal signal, can see defect in final imaging diagram, convenient to use, and the accuracy of detection is high.

[0040] In a more preferred embodiment, the terahertz detection assembly 12 comprises,

[0041] Power board 121 is connected to power supply 5;

[0042] Voice coil motor drive board 122 is connected to power board 121;

[0043] Delay line 123 is connected to voice coil motor drive board 122;

[0044] Laser 124 is connected to power board 121 and delay line 123.

[0045] Specifically, according to Figure 3 As shown by the red arrow, power board 121 supplies 12V power to voice coil motor drive board 122 and laser 124, and voice coil motor drive board 122 supplies 5V power to delay line 123.

[0046] According to Figure 3 As shown by the yellow arrow, laser 124 outputs a first laser pulse, which is irradiated onto the photoconductive antenna to generate terahertz waves;

[0047] Laser 24 outputs a second laser pulse, which is input into the terahertz receiving antenna through delay line 123 for time-sharing sampling.

[0048] In a more preferred embodiment, the terahertz detection assembly 12 further comprises,

[0049] Acquisition card 125 is connected to transceiving integrated probe 11;

[0050] Wireless transmitter 126 is connected to acquisition card 125.

[0051] Specifically, the signal is transmitted to the transceiving integrated probe 11 for detection, and the signal of the transceiving integrated probe 11 is processed by high-speed sampling. The signal is processed by a series of processes such as frequency domain change, filtering, convolution, etc., to generate a material cross-section image based on time of flight.

[0052] In a preferred embodiment, the moving assembly 21 comprises a mounting platform 211 and an actuator 212 located below the mounting platform 211.

[0053] Specifically, the actuator 212 can be a universal wheel, which can perform forward, backward, steering and other operations in any direction.

[0054] In a preferred embodiment, the surface of the mounting platform 211 is provided with a sliding rail 214, and the bottom of the terahertz detection assembly 12 is provided with a sliding block which is movably arranged in the sliding rail 214.

[0055] Specifically, the terahertz detection assembly 12 is detachably connected with the mounting platform 211. After the automatic inspection system passes through the narrow area, it enters the inside of the wind power blade 4, is quickly assembled, and after the assembly is completed, the metal plate is placed below the transceiving integrated probe 11, and the equipment is started for calibration. It has portability, stability and adaptability.

[0056] The sliding block is provided with a buckle structure for fixing, which ensures the stability of the mounting platform 211 and the terahertz detection assembly 12 after being connected.

[0057] In a preferred embodiment, the moving assembly 21 further comprises a laser guiding device 213 arranged on the side surface of the mounting platform 211, which guides the detection path.

[0058] The inside of the mounting platform 211 is provided with a camera 215 for shooting the surrounding environment image.

[0059] Specifically, the camera 215 is used for real-time transmission of the surrounding environment image, and under the cooperation of the laser guiding device 213, the required detection area 41 is detected.

[0060] In a preferred embodiment, the detection end 1 further comprises a communication converter 127 connected with the terahertz detection assembly 12, which converts the signal of the terahertz detection assembly 12 into a signal suitable for the communication of the detection end 1. Figure 3 As shown by the blue arrow, the communication converter 127 is connected with the wireless transmitter 126 and the voice coil motor driving board 122.

[0061] In a preferred embodiment, it further comprises a control end 3, which comprises a control panel 31 for displaying the detection image, and the control end 3 is connected with the detection end 1 and the mounting end 2.

[0062] Specifically, according to the Figure 3The control panel 31 is connected to the wireless transmitter 126 and the camera 125, as shown by the brown dashed line.

[0063] According to the above Figure 3 The voice coil motor drive board 122 reciprocates to realize the scanning of the transceiving integrated probe 11 in the depth direction, as shown by the green arrow. A group of depth information is collected every time the voice coil motor drive board 122 reciprocates. After a series of processing such as filtering, frequency domain conversion and convolution, the material cross-sectional image is generated. When an abnormality is detected, the relevant information can be saved by operating the control panel 31. The data is communicated in real time with the control panel 31 through the wireless transmitter 126, and then the real-time structure detection of the web bonding area is completed.

[0064] When an abnormality is detected, the relevant image will be marked, and the detection time and position will be saved in the form of a file during the marking, so that subsequent maintenance personnel can perform maintenance operations according to the relevant information.

[0065] In a preferred embodiment, the control end 3 further comprises a remote controller 32 for driving the steering and movement of the actuator 212.

[0066] Specifically, according to the above Figure 3 Under the guidance of the yellow dashed line, the control end 3 sends a remote control instruction to the actuator 212 through the remote controller 32, the carrying platform 211 moves inside the wind power blade 4 according to the remote control instruction, the laser guiding device 213 leads out a detection path, the laser is aligned with the area to be detected, the center of the transceiving integrated probe 11 coincides with the laser light, the detection deviates from the target is prevented, the carrying platform 211 moves according to the detection path, and the wind power blade 4 is detected by the terahertz detection assembly 12, so that the detection accuracy is high, the longitudinal accuracy can reach 0.01 mm, the detection efficiency is high, the detection efficiency is improved from the original 40 m / h to 80 m / h, the detection efficiency is doubled, and the operation and maintenance cost is reduced by at least 1 / 3.

[0067] The power supply 5 is used for supplying power to the power board 121, the actuator 212 and the camera 215, as shown by the red arrow. Figure 3 The power supply 5 is used for supplying power to the power board 121, the actuator 212 and the camera 215, as shown by the red arrow.

[0068] The above only describes the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model. For those skilled in the art, it should be realized that any equivalent replacement and obvious change obtained by applying the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. An automatic inspection system for the inner cavity web of a wind turbine blade, characterized in that, include, The detection end includes, A transceiver probe that transmits terahertz waves and collects reflected signals; A terahertz detection component is connected to the transceiver probe. The terahertz detection component generates a terahertz signal, which is transmitted to the transceiver probe. The terahertz detection component receives the reflected signal and outputs a detection image. The mounting end includes a moving component that carries the transceiver probe and the terahertz detection component and moves within the wind turbine blade along the detection path.

2. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 1, characterized in that, The terahertz detection component includes: Power board, connected to the power supply; A voice coil motor driver board is connected to the power supply board; The delay line is connected to the voice coil motor drive board; The laser is connected to the power board and the delay line.

3. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 2, characterized in that, The terahertz detection component also includes The data acquisition card is connected to the transceiver probe. A wireless transmitter is connected to the acquisition card.

4. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 1, characterized in that, The mobile component includes a mounting platform and an actuator located below the mounting platform.

5. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 4, characterized in that, The mobile component also includes a laser guiding device disposed on the side of the mounting platform, the laser guiding device guiding the detection path.

6. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 4, characterized in that, The surface of the mounting platform is provided with a slide rail, and the bottom of the terahertz detection component is provided with a slider, which is movably disposed within the slide rail.

7. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 4, characterized in that, The platform is equipped with a camera for capturing images of the surrounding environment.

8. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 1, characterized in that, The detection end also includes a communication converter, which is connected to the terahertz detection component.

9. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 4, characterized in that, It also includes a control terminal, which includes a control panel for displaying the detected image, and the control terminal is connected to the detection terminal and the mounting terminal.

10. The automatic inspection system for the inner cavity web of a wind turbine blade according to claim 9, characterized in that, The control terminal also includes a remote controller for driving the actuator to turn and move.

Images