A wind turbine wind speed online measurement device and wind speed online measurement method

Abstract

The present invention provides an online wind speed measurement device and an online wind speed measurement method for a wind turbine, belonging to the field of wind speed measurement technology. Its technical solution is as follows: an online wind speed measurement device for a wind turbine, comprising a wind gathering frame, a detection cross bar provided inside the wind gathering frame, a plurality of wind speed sensors evenly distributed on the detection cross bar, all of which are connected to a wind speed collector, the two ends of the detection cross bar being connected to the wind gathering frame via a lifting mechanism, the lifting mechanism being provided on a side baffle of the wind gathering frame, the inner side of the side baffle being evenly distributed with a plurality of positioning points in the vertical direction, the lifting mechanism being able to move the detection cross bar up and down, and when the detection cross bar is displaced to the positioning point, the wind speed collector collects the measurement data of the wind speed sensor. The beneficial effects of the present invention are: multi-point measurement, high measurement accuracy, convenient operation, and high work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wind speed measurement, and in particular to an online wind speed measurement device for a fan. Background Art

[0002] At present, most of the equipment for measuring wind speed of wind turbines on the market adopts single-point measurement. This wind measurement method cannot meet the current testing needs of wind speed of wind turbines, especially for large-diameter wind turbines. Since the wind speed is inconsistent in different places, the accuracy of using a single-point wind speed meter is bound to be low. In addition, since the measurement point of the single-point wind speed measurement method is not fixed, it requires people to move the handheld device for multiple point measurements, which will not only further amplify the manual error, but also make the operation very complicated. Once a large number of points need to be measured, it is difficult to ensure work efficiency and measurement accuracy. Summary of the Invention

[0003] In response to the above-mentioned problems in the prior art, the purpose of the present invention is to provide an online wind speed measurement device for a fan, which can perform multi-point measurement of the wind speed at the fan outlet through a quick operation method. The collection positions are fixed and evenly distributed, which can ensure both work efficiency and measurement accuracy.

[0004] The present invention is achieved through the following technical solutions: a wind turbine wind speed online measurement device, comprising a wind gathering frame, a detection cross bar is provided inside the wind gathering frame, a number of wind speed sensors are evenly distributed on the detection cross bar, all of the wind speed sensors are connected to a wind speed collector, both ends of the detection cross bar are connected to the wind gathering frame through a lifting mechanism, the lifting mechanism is arranged on the side baffle of the wind gathering frame, the inner side of the side baffle is evenly distributed with a number of positioning points in the vertical direction, the lifting mechanism can move the detection cross bar up and down, when the detection cross bar is moved to the positioning point, the wind speed collector collects the measurement data of the wind speed sensor, the wind speed collector collects the signal of the wind speed sensor each time and stores and processes the collected data.

[0005] Furthermore, the lifting mechanism includes a synchronous pulley mechanism symmetrically arranged on the outside of the two groups of side baffles, and each group of the synchronous belt mechanism includes two synchronous pulleys rotatably arranged at the upper and lower ends of the outer sides of the side baffles and a synchronous belt arranged on the synchronous pulleys; a transmission rod is provided between the two synchronous pulleys arranged at the bottom to achieve the effect of synchronous rotation, and a longitudinal slide groove is provided on the side baffle, and a cross bar connecting frame is slidingly provided on the longitudinal slide groove, one side of the cross bar connecting frame is connected to the synchronous belt, and the other side can be connected to the detection cross bar; the transmission rod is driven to synchronously drive the synchronous pulley to rotate, and the synchronous belt links the cross bar connecting frame and the detection cross bar to move up and down.

[0006] Furthermore, the positioning points are tooth-shaped grooves evenly distributed on one side of the longitudinal slide; a distance sensor is provided on either side of the detection crossbar, and the vertical displacement path of the distance sensor corresponds to the tooth-shaped groove. The distance sensor can be a diffuse reflection laser sensor, an NPN / PNP proximity switch, or other methods to achieve the above-mentioned distance sensing.

[0007] In order to maintain the stability of the detection crossbar as much as possible during displacement, a guide rail is further provided on the outer side of the side baffle, and a sliding mechanism is provided on the guide rail. The crossbar connecting frame is connected to the sliding mechanism, and the sliding mechanism is fixed to the synchronous belt via a connecting plate. The sliding mechanism includes a pulley mounting plate and four symmetrically arranged pulleys. The guide rail is two parallel strips. The outer sides of the pulleys are clamped on the strips. The synchronous belt drives the sliding mechanism to slide up and down along the guide rail, thereby ensuring the stability of the detection crossbar during displacement and improving the reliability of the detection data.

[0008] Furthermore, any one end of the transmission rod extends out of the side baffle and is provided with a hand wheel.

[0009] The sizes of the fan outlets installed in the breeding farm area are usually 24 inches, 32 inches, and 55 inches; considering the versatility of this device, it can maximize the utilization of this device. Furthermore, the detection cross bar is set as a hollow telescopic rod, and the upper side of the telescopic rod is provided with a horizontal slide groove, and the wind speed sensor is slidably set in the horizontal slide groove.

[0010] Furthermore, the number of the wind speed sensors is at least 5, and the wind speed sensors are detachably connected through aviation plugs. The aviation plugs are installed on the horizontal slide grooves and their positions are adjustable. The wires of the wind speed sensors pass through the hollow space of the detection cross bar and are connected to the wind speed collector.

[0011] Furthermore, the two ends of the side baffles are connected by a horizontal baffle, and the two ends of the horizontal baffle are slid up and down and are arranged between the side baffles.

[0012] Furthermore, it also includes a support frame, one end of which is rotatably arranged in the middle of both sides of the wind gathering frame, and the other end can be supported on the ground, and the height of the support frame can be adjusted.

[0013] Furthermore, the rotational connection with the wind gathering frame adopts a damping shaft or a locking device can be provided to lock the support frame and the wind gathering frame after the angle is adjusted.

[0014] Furthermore, a sealing ring is provided on the side of the side baffle and the horizontal baffle close to the fan.

[0015] Furthermore, a baffle plate is provided on and outside the side baffle plate, and the guide rail is provided on the baffle plate; a mounting cavity is formed between the baffle plate and the side baffle plate, and the lifting mechanism is provided in the mounting cavity.

[0016] Furthermore, the wind speed collector includes a processor module and a signal acquisition module, a display module, a communication module, and a keyboard input module connected to the processor module;

[0017] The wind speed sensor converts the wind speed into an electrical signal, and the signal acquisition module can acquire the electrical signal of the wind speed sensor and transmit it to the processor module;

[0018] The keyboard input module can set acquisition parameters and acquisition instructions for the processor module;

[0019] The processor module is capable of transmitting the processed data to the display module and the communication module;

[0020] The communication module can provide a data transmission channel to interconnect data with an external terminal in a wireless or wired manner.

[0021] Furthermore, the processor adopts a single chip microcomputer, which can be implemented by 51 series or STM32 series. The acquisition module adopts AD7606. The single chip microcomputer controls the acquisition module to perform AD conversion on the electrical signal of the wind speed sensor.

[0022] A method for online wind speed measurement is provided, wherein the wind speed of a fan is measured online using the above-mentioned online wind speed measurement device. The specific steps are as follows:

[0023] S1. Size adaptation: adjust the length of the detection crossbar according to the size of the fan outlet, select the horizontal baffle corresponding to the width of the fan outlet, and adjust the distance between the upper and lower horizontal baffles according to the height of the fan outlet;

[0024] S2. Install the device by adjusting the height of the support frame according to the position of the fan and sealing the gap between the wind collecting frame and the fan with sealant or tape;

[0025] S3. Start measurement, set acquisition parameters through the keyboard input module, and issue acquisition instructions; the acquisition parameters include at least the size of the fan;

[0026] S4. The hand wheel is rotated at a constant speed, and the collection cross bar is raised at a constant speed. Each time the distance sensor senses a tooth-shaped groove, the wind speed collector performs a detection, and each detection collects the signal values ​​of all the current wind speed sensors;

[0027] S5. The processor sets a corresponding number of acquisition times according to the size of the fan. When the detection crossbar completes the entire path, the processor averages the wind speed measurement values ​​of all measurement points as the wind speed measurement value of the current fan outlet and the total air volume;

[0028] S6. Connecting to an external terminal through the communication module and transmitting relevant data. The communication module is any one of wireless WIFI, serial port, and Bluetooth communication methods.

[0029] Each time the detection begins at the positioning point, the collection frequency is set according to actual needs. For example, each wind speed sensor collects data continuously for 100 times each time, and 5 wind speed sensors collect data 500 times. The wind speed sensor itself also collects data 20 times and then outputs the average value. The data volume for each collection is 10,000 times. After all the collection is completed, the data volume is between tens of thousands and hundreds of thousands, thereby ensuring the high accuracy of the final output detection data.

[0030] The beneficial effects of the present invention are as follows: the present invention adopts a multi-point measurement method to perform multi-point measurement on the fan outlet, the measurement points are evenly distributed, and the measurement accuracy is high; an efficient lifting mechanism is used, the operation is simple, the work efficiency is high, and a longitudinal slide is provided, the collection position is fixed, and the data consistency is high; the wind gathering frame has a simple structure, can be adjusted in size, and is suitable for fan outlets of multiple sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 Schematic diagram of the present invention in use.

[0033] Figure 3 This is a schematic diagram of the lifting structure after removing some structures.

[0034] Figure 4 for Figure 3 A magnified schematic diagram of .

[0035] Figure 5 for Figure 3 Enlarged schematic diagram of point B.

[0036] Figure 6 Schematic diagram of the detection crossbar structure.

[0037] Among them, the accompanying drawings are marked as follows: 100, wind gathering frame; 101, side baffle; 102, longitudinal slide; 103, toothed groove; 104, horizontal baffle; 105, enclosure plate; 110, lifting mechanism; 111, synchronous pulley; 112, synchronous belt; 113, transfer rod; 114, handwheel; 115, pulley; 116, pulley mounting plate; 120, support frame; 130, detection cross bar; 131, hollow telescopic rod; 132, horizontal slide; 133, distance sensor; 134, aviation plug; 135, wind speed sensor; 136, cable connector; 137, cross bar connecting frame; 200, fan outlet. DETAILED DESCRIPTION

[0038] In order to clearly illustrate the technical features of this solution, this solution is described below through specific implementation methods.

[0039] See also Figures 1-6 The present invention is achieved through the following technical solutions: a wind turbine wind speed online measurement device, including a wind gathering frame 100, a detection cross bar 130 is provided inside the wind gathering frame 100, and a plurality of wind speed sensors 135 are evenly distributed on the detection cross bar 130, all of which are connected to the wind speed collector, and both ends of the detection cross bar 130 are connected to the wind gathering frame 100 through a lifting mechanism 110, and the lifting mechanism 110 is provided on the side baffle 101 of the wind gathering frame 100, and a plurality of positioning points are evenly distributed on the inner side of the side baffle 101 along the vertical direction, and the lifting mechanism 110 can detect the up and down displacement of the cross bar 130, and when the detection cross bar 130 moves to the positioning point, the wind speed collector collects the measurement data of the wind speed sensor 135, and the wind speed collector collects the signal of the wind speed sensor 135 each time and stores and processes the collected data.

[0040] There are at least five wind speed sensors 135, and the wind speed sensors 135 are detachably connected through aviation plugs 134. Aviation plugs 134 are installed on the horizontal slide 132 and their positions are adjustable. The wires of the wind speed sensors 135 are passed through the hollow space of the detection cross bar 130. A cable connector 136 is provided on the side of one end of the detection cross bar 130. All wires are connected to the connection point of the cable connector 136 located inside the detection cross bar 130. The cable connector 136 is connected to the wind speed collector through a matching cable.

[0041] The two ends of the side baffles 101 are connected by a horizontal baffle 104 , and the two ends of the horizontal baffle 104 are slidably arranged between the side baffles 101 .

[0042] The sizes of the fan outlet 200 installed in the farm area are usually 24 inches, 32 inches, and 55 inches; considering the versatility of this device and the ability to maximize the utilization of this device, the detection cross bar 130 is set as a hollow telescopic rod, and the upper side of the hollow telescopic rod is provided with a horizontal slide groove 132, and the wind speed sensor 135 is slidably set in the horizontal slide groove 132.

[0043] It also includes a support frame 120, one end of the support frame 120 is rotatably set in the middle of both sides of the wind gathering frame 100, and the other end can be supported on the ground. The height of the support frame 120 is adjustable.

[0044] The rotational connection with the wind gathering frame 100 adopts a damping shaft or can be provided with a locking device to lock the support frame 120 and the wind gathering frame 100 after the angle is adjusted.

[0045] A sealing ring is provided on the side of the side baffle 101 and the horizontal baffle 104 close to the fan.

[0046] Example 2. On the basis of Example 1, the lifting mechanism 110 includes a synchronous pulley mechanism symmetrically arranged on the outside of two groups of side baffles 101, and each group of synchronous pulley mechanisms includes two synchronous pulleys 111 rotatably arranged at the upper and lower ends of the outer sides of the side baffles 101 and a synchronous belt 112 arranged on the synchronous pulleys 111; a transfer rod 113 is provided between the two synchronous pulleys 111 arranged at the bottom to achieve the effect of synchronous rotation, a longitudinal slide groove 102 is provided on the side baffle 101, and a cross bar connecting frame 137 is slidingly provided on the longitudinal slide groove 102, one side of the cross bar connecting frame 137 is connected to the synchronous belt 112, and the other side can be connected to the detection cross bar 130; the transmission rod 113 is driven to synchronously drive the synchronous pulley 111 with the synchronous belt 112, and the synchronous belt 112 links the cross bar connecting frame 137 and the detection cross bar 130 to move up and down.

[0047] The positioning points are tooth-shaped grooves 103 evenly distributed on one side of the longitudinal slide 102. A distance sensor 133 is provided on either side of the detection crossbar 130. The up and down displacement path of the distance sensor 133 corresponds to the tooth-shaped groove 103. The distance sensor 133 can be a diffuse reflection laser sensor, an NPN / PNP proximity switch, or other methods to achieve the above-mentioned distance sensing.

[0048] Considering the need to maintain stability as much as possible when detecting crossbar 130 is displaced, a guide rail is provided on the outside of the side baffle 101. The guide rail is provided with a sliding mechanism. A crossbar connecting frame 137 is connected to the sliding mechanism. The sliding mechanism is fixed to the synchronous belt 112 via a connecting plate. The sliding mechanism includes a pulley mounting plate 116 and four symmetrically arranged pulleys 115. The guide rails are two parallel strips arranged on the profile. The outer sides of the pulleys 115 slide on the strips. The synchronous belt 112 drives the pulley mechanism to slide up and down along the guide rails, thereby ensuring stability when detecting crossbar 130 is displaced, and thus improving the reliability of the detection data.

[0049] Either end of the transmission rod 113 extends out of the side baffle 101 and is provided with a hand wheel 114 .

[0050] A baffle plate 105 is provided on the outer side of the side baffle 101, and a guide rail is provided on the baffle plate 105. A mounting cavity is formed between the baffle plate 105 and the side baffle 101, and a lifting mechanism 110 is provided within the mounting cavity. The wind collecting frame 100 is entirely made of hollow aluminum alloy profiles, which are lightweight and cost-effective. The horizontal baffle 104, the side baffle 101, and the baffle plate 105 are hollow aluminum alloy profiles, with plastic gussets provided at the adjacent joints. The horizontal baffle 104 can be adjusted in height by using the grooves provided by the aluminum alloy profiles and corresponding sliding accessories.

[0051] Embodiment 3, based on embodiment 1 or embodiment 2, the wind speed collector includes a processor module and a signal acquisition module connected to the processor module, a display module, a communication module, and a keyboard input module;

[0052] The wind speed sensor 135 converts the wind speed into an electrical signal. The signal acquisition module can collect the electrical signal of the wind speed sensor 135 and transmit it to the processor module.

[0053] The keyboard input module can set acquisition parameters and acquisition instructions for the processor module;

[0054] The processor module can transmit the processed data to the display module and the communication module;

[0055] The communication module can provide a data transmission channel to interconnect data with external terminals via wireless or wired means.

[0056] The processor uses a single-chip microcomputer (MCU), either the 51 series or the STM32 series. The acquisition module uses the AD7606. The MCU controls the acquisition module to perform A / D conversion on the electrical signal from the wind speed sensor 135. Wind speed sensors 135 currently exist in various forms, capable of detecting wind speed signals and outputting non-standard voltage, current, or digital signals. The corresponding acquisition circuit modules are also conventional, and the circuit hardware details will not be elaborated here; existing technologies can be used to implement them.

[0057] A method for online wind speed measurement is provided, wherein the wind speed of a fan is measured online using the above-mentioned online wind speed measurement device. The specific steps are as follows:

[0058] S1. Size adaptation: adjust the length of the detection crossbar 130 according to the size of the fan outlet 200, select a horizontal baffle 104 corresponding to the width of the fan outlet 200, and adjust the distance between the upper and lower horizontal baffles 104 according to the height of the fan outlet 200;

[0059] S2. Install the device. Adjust the height of the support frame 120 according to the position of the fan. Use sealant or tape to seal the gap between the wind collecting frame 100 and the fan.

[0060] S3. Start measuring, set acquisition parameters through the keyboard input module, and issue acquisition instructions; the acquisition parameters include at least the fan size;

[0061] S4. Rotate the hand wheel 114 at a constant speed, and the collection crossbar rises at a constant speed. Each time the distance sensor 133 senses a toothed groove 103, the wind speed collector performs a detection. Each detection collects the signal values ​​of all current wind speed sensors 135.

[0062] S5. The processor sets the corresponding number of acquisitions according to the size of the fan. When the detection crossbar 130 completes the entire path, the processor averages the wind speed measurement values ​​of all measurement points as the wind speed measurement value of the current fan outlet 200 and the total air volume;

[0063] S6. Connecting to an external terminal through a communication module and transmitting relevant data. The communication module is any one of wireless WIFI, serial port, and Bluetooth communication methods.

[0064] Each time the detection starts at the positioning point, the collection frequency is set according to actual needs. For example, each wind speed sensor 135 collects data continuously for 100 times each time, and 5 wind speed sensors 135 collect data for 500 times. The wind speed sensor 135 itself also collects data for 20 times and then outputs the average value. The amount of data collected each time is 10,000 times. After all the collection is completed, the amount of data is between tens of thousands and hundreds of thousands, thereby ensuring the high accuracy of the final output detection data.

[0065] In describing the present invention, the preceding detailed description has described various embodiments of devices and / or processes through the use of block diagrams, flow charts, and / or examples. To the extent that such block diagrams, flow charts, and / or examples contain one or more functions and / or operations, those skilled in the art will understand that each function and / or operation within such block diagrams, flow charts, or examples can be implemented individually and / or collectively through many different hardware, software, firmware, or any combination thereof.

[0066] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art can understand the specific meanings of the above terms in the present invention based on specific circumstances.

Claims

1. A wind turbine wind speed online measurement device, characterized in that: It includes a wind gathering frame, a detection cross bar is provided inside the wind gathering frame, a plurality of wind speed sensors are evenly distributed on the detection cross bar, all of the wind speed sensors are connected to the wind speed collector, both ends of the detection cross bar are connected to the wind gathering frame through a lifting mechanism, the lifting mechanism is provided on the side baffle of the wind gathering frame, the inner side of the side baffle is evenly distributed with a plurality of positioning points in the vertical direction, the lifting mechanism can drive the detection cross bar to move up and down, and when the detection cross bar moves to the positioning point, the wind speed collector collects the measurement data of the wind speed sensor; The lifting mechanism includes two groups of synchronous pulley mechanisms symmetrically arranged on the outer sides of the side baffles, each group of the synchronous pulley mechanisms includes two synchronous pulleys rotatably arranged at the upper and lower ends of the outer sides of the side baffles and a synchronous belt arranged on the synchronous pulleys; a transmission rod is provided between the two synchronous pulleys arranged at the bottom, and a longitudinal slide groove is provided on the side baffle, and a cross bar connecting frame is slidably provided on the longitudinal slide groove, one side of the cross bar connecting frame is connected to the synchronous belt, and the other side can be connected to the detection cross bar; The positioning points are tooth-shaped grooves evenly distributed on one side of the longitudinal slide; a distance sensor is provided on either side of the detection crossbar, and the up and down displacement path of the distance sensor corresponds to the tooth-shaped groove; A guide rail is provided on the outer side of the side baffle, a sliding mechanism is provided on the guide rail, the crossbar connecting frame is connected to the sliding mechanism, and the sliding mechanism is fixed to the synchronous belt through a connecting plate; Any one end of the transmission rod extends out of the side baffle and is provided with a hand wheel.

2. The online wind speed measuring device for a fan according to claim 1, characterized in that: The detection cross bar is set as a hollow telescopic rod, the upper side of the telescopic rod is provided with a horizontal sliding groove, and the wind speed sensor is slidably arranged in the horizontal sliding groove.

3. The online wind speed measuring device for a fan according to claim 2, characterized in that: The two ends of the side baffles are connected by a horizontal baffle, and the two ends of the horizontal baffle are slidably arranged between the side baffles.

4. The online wind speed measuring device for a fan according to claim 3, characterized in that: It also includes a support frame, one end of which is rotatably arranged in the middle of both sides of the wind gathering frame, and the other end can be supported on the ground, and the height of the support frame can be adjusted.

5. The online wind speed measuring device for a fan according to claim 4, characterized in that: The wind speed collector includes a processor module and a signal acquisition module, a display module, a communication module, and a keyboard input module connected to the processor module; The wind speed sensor converts the wind speed into an electrical signal, and the signal acquisition module can acquire the electrical signal of the wind speed sensor and transmit it to the processor module; The keyboard input module can set acquisition parameters and acquisition instructions for the processor module; The processor module is capable of transmitting the processed data to the display module and the communication module; The communication module can provide a data transmission channel to interconnect data with an external terminal in a wireless or wired manner.

6. A method for online wind speed measurement, wherein the wind speed of a wind turbine is measured using the online wind speed measurement device of claim 5, the specific steps being: S1. Size adaptation: adjust the length of the detection crossbar according to the size of the fan outlet, select the horizontal baffle corresponding to the width of the fan outlet, and adjust the distance between the upper and lower horizontal baffles according to the height of the fan outlet; S2. Install the device by adjusting the height of the support frame according to the position of the fan and sealing the gap between the wind collecting frame and the fan with sealant or tape; S3. Start measurement, set acquisition parameters through the keyboard input module, and issue acquisition instructions; the acquisition parameters include at least the size of the fan; S4. The hand wheel is rotated at a constant speed, and the detection cross bar is raised at a constant speed. Each time the distance sensor senses a tooth-shaped groove, the wind speed collector performs a detection, and each detection collects the signal values ​​of all the current wind speed sensors; S5. The processor sets a corresponding number of acquisition times according to the size of the fan. When the detection crossbar completes the entire path, the processor averages the wind speed measurement values ​​of all measurement points as the wind speed measurement value of the current fan outlet; S6. Connecting to an external terminal through the communication module and transmitting relevant data. The communication module is any one of wireless WIFI, serial port, and Bluetooth communication methods.

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