Wind power blade joint gap detection sensor and detection method

Abstract

The invention discloses a wind power blade joint gap detection sensor and a detection method, the wind power blade joint gap detection sensor comprises a detection module and a signal transmission module, the detection module comprises a sensor main body, a Hall element, a magnet sheet and a pagoda spring, and the sensor main body is uniformly provided with a plurality of first mounting holes; the sensor body is provided with a first mounting hole, the magnet sheet is arranged at the lower end of the first mounting hole, the pagoda spring is arranged at the upper end of the magnet sheet, the Hall element is arranged at the upper end of the pagoda spring, the signal output module comprises a main processor and a wireless transmission module, the wireless transmission module is arranged on the sensor body, and the wireless transmission module is connected with the main processor. The Hall element is electrically connected with the wireless transmission module and establishes communication connection with the wireless transmission module, and the wireless transmission module establishes wireless communication connection with the main processor. According to the wind power blade joint gap detection sensor and the detection method provided by the invention, the working intensity can be reduced, the detection result can be ensured to be more accurate, and the efficiency is higher.

Description

Technical Field

[0001] The invention belongs to the field of wind turbine blade mould measurement, and in particular relates to a wind turbine blade joint gap detection sensor and a detection method. Background Art

[0002] A wind turbine blade mold is a mold used to form wind turbine blades. Existing wind turbine blade molds usually use the following method to measure the mold gap: during the production and debugging process, when the upper and lower molds are closed, the mold gap is padded with soft materials such as plasticine in the mold gap, and the gap size of each mold position is determined by pre-pressing the mold and then measuring the thickness of the plasticine after opening. The existing mold gap measurement method generally requires repeated mold measurement and adjustment of the mold gap to finally achieve a uniform gap, and the steps are cumbersome; and the plasticine is soft, which can easily lead to inaccurate measurements. Moreover, as wind turbines continue to develop in the direction of large-scale, the size of wind turbine blades is gradually increasing, and the flipping and closing of large blade molds is becoming more and more difficult and time-consuming, which further increases the difficulty of the mold gap measurement method under the existing technology. Summary of the invention

[0003] In order to solve the deficiencies in the prior art, the present invention provides a wind turbine blade gap detection sensor and a detection method.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A wind turbine blade gap detection sensor comprises a detection module and a signal transmission module, wherein the detection module comprises a sensor body, a Hall element, a magnet sheet and a pagoda spring, wherein a plurality of first mounting holes are evenly arranged on the sensor body, the magnet sheet is arranged at the lower end of the first mounting hole, the pagoda spring is arranged at the upper end of the magnet sheet, the Hall element is arranged at the upper end of the pagoda spring, the signal output module comprises a main processor and a wireless transmission module, the wireless transmission module is arranged on the sensor body, the Hall element is electrically connected to the wireless transmission module and establishes a communication connection, and the wireless transmission module establishes a wireless communication connection with the main processor.

[0006] Furthermore, the thickness of the sensor body is 2 mm, the thickness of the magnet sheet is not more than 1 mm, and the thickness of the Hall element is not more than 1 mm.

[0007] Furthermore, the width of the sensor body is 80-150 mm.

[0008] Furthermore, the thickness of the wireless transmission module is not greater than 2 mm, and the Hall element is connected to the wireless transmission module via a metal wire.

[0009] Furthermore, the wire diameter of the pagoda spring is not greater than 1 mm, and the height of the pagoda spring is not less than 9 mm.

[0010] Furthermore, the first mounting holes are arranged in a matrix, and the spacing between the first mounting holes is no greater than 50 mm.

[0011] Furthermore, the wire diameter of the pagoda spring is not greater than 1 mm.

[0012] Furthermore, the sensor body is made of a flexible substrate.

[0013] A method for detecting a gap between wind turbine blades comprises the following steps:

[0014] Step S1: First, prepare the upper mold and the lower mold of the wind turbine blade in place, roll up the sensor body and lay it flat on the lower mold of the wind turbine blade, flip the upper mold of the wind turbine blade onto the upper mold of the wind turbine blade, and the sensor body corresponds to the joint between the upper mold and the lower mold of the wind turbine blade;

[0015] Step S2: The upper mold of the wind turbine blade presses the Hall element downward, the pagoda spring is compressed, and the distance between the Hall element and the magnet sheet is reduced. The distance between the Hall element and the magnet sheet is calculated based on the signal output by the Hall element and transmitted to the main processor through the wireless transmission module;

[0016] Step S3: The main processor monitors the data to obtain the signal of each Hall element, calculates and obtains the joint distance of the corresponding position of each Hall element, and marks the joint distance exceeding 10 mm.

[0017] The wind turbine blade joint gap detection sensor and detection method disclosed in the present invention have the beneficial effect, compared with the prior art, that there is no need to repeatedly pad plasticine on the wind turbine blade, and there is no need to continuously measure the thickness of the plasticine. Instead, the thickness can be directly calculated by the main processor at one time, and the position where the joint gap exceeds 10 mm can be accurately marked, so that the corresponding position can be found accurately and quickly, which can save more workload, reduce work intensity, and ensure that the detection result is more accurate and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the detection module of the preferred embodiment provided by the present invention.

[0019] Figure 2 It is a schematic structural diagram of a pagoda spring according to a preferred embodiment of the present invention.

[0020] Figure 3 It is a schematic structural diagram of the first mounting hole of the preferred embodiment provided by the present invention.

[0021] Figure 4It is a detection principle block diagram of a preferred embodiment provided by the present invention.

[0022] The reference numerals include: 100, sensor body; 110, wireless transmission module; 111, amplification circuit; 112, conversion circuit; 113, wireless circuit; 120, magnet sheet; 130, pagoda spring; 140, Hall element; 150, first mounting hole; 160, main processor. DETAILED DESCRIPTION

[0023] The present invention discloses a wind turbine blade gap detection sensor and a detection method. The specific implementation of the present invention is further described below in conjunction with preferred embodiments.

[0024] See attached figure Figure 1-4 , Figure 1 is a schematic diagram of the structure of a detection module in a preferred embodiment of the present invention. Figure 2 1 is a schematic diagram of the structure of a pagoda spring 130 according to a preferred embodiment of the present invention. Figure 3 is a schematic structural diagram of the first mounting hole 150 of a preferred embodiment provided by the present invention, Figure 4 It is a detection principle block diagram of a preferred embodiment provided by the present invention.

[0025] Preferred embodiments.

[0026] The present embodiment provides a wind turbine blade gap detection sensor, including a detection module and a signal transmission module. The detection module includes a sensor body 100, a Hall element 140, a magnet sheet 120 and a pagoda spring 130. A plurality of first mounting holes 150 are evenly arranged on the sensor body 100. The magnet sheet 120 is arranged at the lower end of the first mounting hole 150. The pagoda spring 130 is arranged at the upper end of the magnet sheet 120. The Hall element 140 is arranged at the upper end of the pagoda spring 130. The signal output module includes a main processor 160 and a wireless transmission module 110. The wireless transmission module 110 is arranged on the sensor body 100. The Hall element 140 is electrically connected to the wireless transmission module 110 and establishes a communication connection. The wireless transmission module 110 establishes a wireless communication connection with the main processor 160.

[0027] Furthermore, the thickness of the sensor body 100 is 2 mm, the thickness of the magnet sheet 120 is not greater than 1 mm, and the thickness of the Hall element 140 is not greater than 1 mm.

[0028] Furthermore, the width of the sensor body 100 is 80-150 mm.

[0029] Furthermore, the thickness of the wireless transmission module 110 is not greater than 2 mm, and the Hall element 140 is connected to the wireless transmission module 110 via a metal wire.

[0030] Furthermore, the wire diameter of the pagoda spring 130 is not greater than 1 mm, and the height of the pagoda spring 130 is not less than 9 mm.

[0031] Furthermore, the first mounting holes 150 are arranged in a matrix, and the interval between the first mounting holes 150 is no greater than 50 mm.

[0032] Furthermore, the wire diameter of the pagoda spring 130 is not greater than 1 mm.

[0033] Furthermore, the sensor body 100 is made of a flexible substrate.

[0034] A method for detecting a gap between wind turbine blades comprises the following steps:

[0035] Step S1: First, prepare the upper mold and the lower mold of the wind turbine blade, roll up the sensor body 100 and lay it flat on the lower mold of the wind turbine blade, flip the upper mold of the wind turbine blade onto the upper mold of the wind turbine blade, and the sensor body 100 corresponds to the joint between the upper mold and the lower mold of the wind turbine blade;

[0036] Step S2: The upper mold of the wind turbine blade presses the Hall element 140 downward, the pagoda spring 130 is compressed, and the distance between the Hall element 140 and the magnet sheet 120 is reduced. The distance between the Hall element 140 and the magnet sheet 120 is calculated based on the signal output by the Hall element 140 and transmitted to the main processor 160 through the wireless transmission module 110;

[0037] Step S3: The main processor 160 monitors the data to obtain the signal of each Hall element 140, calculates and obtains the joint distance of the corresponding position of each Hall element 140, and marks the joint distance exceeding 10 mm.

[0038] Working principle: After the detection module is formed, the sensor body 100 can be rolled up. When it is necessary to detect the mold seam of the upper mold and the lower mold of the wind turbine blade, the sensor body 100 is directly spread out and laid flat on the mold seam of the lower mold of the wind turbine blade. Then the upper mold of the wind turbine blade is turned over so that the upper mold and the lower mold of the wind turbine blade are combined. When the upper mold and the lower mold of the wind turbine blade are combined, the Hall element 140 will be squeezed, so that the pagoda spring 130 is compressed, that is, the distance between the Hall element 140 and the magnet sheet 120 changes, and the detection result of the Hall element 140 changes, and the signal is obtained and amplified by the wireless transmission module 110, and then the main processor 160 can calculate and detect the distance between the Hall element 140 and the magnet sheet 120, that is, the specific gap size of the mold seam of the upper mold and the lower mold of the wind turbine blade can be obtained, and the position mark where the specific gap exceeds 10mm can be compared, and it can be directly checked in the corresponding position, which is more convenient.

[0039] Among them, when the pagoda spring 130 is fully compressed, the pagoda spring 130 can be compressed in a plane, that is, it is ensured that the Hall element 140 can be compressed into the first mounting hole 150, that is, it is ensured that the gap between the upper mold and the lower mold of the wind turbine blade is at least 2mm. It is worth noting that the requirement for the mold seam between the upper mold and the lower mold of the wind turbine blade is 6±4mm, that is, it is reasonable for the mold seam to be between 2-10mm. Therefore, the height of the pagoda spring 130 is not less than 9mm when not compressed, that is, it can detect the situation that the mold seam between the upper mold and the lower mold of the wind turbine blade is not less than 10mm, so that it can mark the repair.

[0040] The wireless transmission module 110 includes an amplifier circuit 111, a conversion circuit 112 and a wireless circuit 113. The amplifier circuit 111 collects and amplifies the signal of the Hall element 140, converts it into a digital signal through the conversion circuit 112, and transmits it to the main processor 160 through the wireless circuit 113, so that the main processor 160 receives and calculates the size of the mold seam at each Hall element 140, marks the position where the mold seam is greater than 10mm, and detects and repairs it, so that the next mold processing can be carried out. In this process, there is no need to repeatedly pad the wind turbine blade with plasticine, and there is no need to continuously measure the thickness of the plasticine (when measuring the thickness, at least three points within 10cm need to be tested, so the measurement workload is huge), but it is directly calculated by the main processor 160 at one time, and the position where the mold seam exceeds 10mm can be accurately marked, so that the corresponding position can be found accurately and quickly, which can save more workload, reduce work intensity, and ensure that the detection result is more accurate and efficient.

[0041] It is worth mentioning that the technical features such as the Hall element 140 involved in the patent application of the present invention should be regarded as the prior art. The specific structure, working principle and possible control method and spatial arrangement method of these technical features can be selected by conventional methods in the field, and should not be regarded as the inventive point of the patent of the present invention. The patent of the present invention will not be further elaborated.

[0042] For those skilled in the art, it is still possible to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wind turbine blade gap detection sensor, characterized in that: The invention comprises a detection module and a signal transmission module, wherein the detection module comprises a sensor body (100), a Hall element (140), a magnet sheet (120) and a pagoda spring (130), wherein a plurality of first mounting holes (150) are evenly arranged on the sensor body (100), the magnet sheet (120) is arranged at the lower end of the first mounting hole (150), the pagoda spring (130) is arranged at the upper end of the magnet sheet (120), the Hall element (140) is arranged at the upper end of the pagoda spring (130), and the signal output module comprises a main processor (160) and a wireless transmission module (110), wherein the wireless transmission module (110) is arranged on the sensor body (100), the Hall element (140) is electrically connected to the wireless transmission module (110) and establishes a communication connection, and the wireless transmission module (110) establishes a wireless communication connection with the main processor (160).

2. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The thickness of the sensor body (100) is 2 mm, the thickness of the magnet sheet (120) is not greater than 1 mm, and the thickness of the Hall element (140) is not greater than 1 mm.

3. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The width of the sensor body (100) is 80-150 mm.

4. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The thickness of the wireless transmission module (110) is not greater than 2 mm, and the Hall element (140) is connected to the wireless transmission module (110) via a metal wire.

5. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The wire diameter of the pagoda spring (130) is not greater than 1 mm, and the height of the pagoda spring (130) is not less than 9 mm.

6. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The first mounting holes (150) are arranged in a matrix, and the spacing between the first mounting holes (150) is no greater than 50 mm.

7. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The wire diameter of the pagoda spring (130) is not greater than 1 mm.

8. The wind turbine blade gap detection sensor according to claim 1, characterized in that: The sensor body (100) is made of a flexible substrate.

9. A method for detecting the gap between wind turbine blades, implemented by the wind turbine blade gap detection sensor according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step S1: First, the upper mold and the lower mold of the wind turbine blade are prepared in place, the sensor body (100) is rolled out and laid flat on the lower mold of the wind turbine blade, and the upper mold of the wind turbine blade is turned over onto the upper mold of the wind turbine blade, and the sensor body (100) corresponds to the joint between the upper mold and the lower mold of the wind turbine blade; Step S2: the upper mold of the wind turbine blade presses the Hall element (140) downward, the pagoda spring (130) is compressed, the distance between the Hall element (140) and the magnet sheet (120) is reduced, the distance between the Hall element (140) and the magnet sheet (120) is calculated based on the signal output by the Hall element (140), and transmitted to the main processor (160) through the wireless transmission module (110); Step S3: The main processor (160) monitors the data to obtain the signal of each Hall element (140), calculates and obtains the joint distance of the corresponding position of each Hall element (140), and marks the joint distance exceeding 10 mm.

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