Fan tower load and attitude detection device based on light sensation signal difference calculation

Abstract

The invention discloses a fan tower load and attitude detection device based on array type light sensation signal difference calculation, which comprises a main control system, a plurality of light path signal generating devices and a plurality of light path signal receiving devices, the main control system comprises a display screen, a programmable controller, a communication module, a digital quantity module, an analog quantity module, a photoelectric signal transceiving conversion module and a data fidelity processing module, the display screen is electrically connected with the communication module, and the display screen is provided with a human-computer interaction interface; the display screen is used for displaying current data and historical data and setting various functions of the main control system, the programmable controller is connected with the communication module and is used for operating programs in the main control system, processing the internal data and communicating and issuing control instructions through the communication module, and the digital quantity module is connected with the communication module and is used for displaying the current data and the historical data. The communication module is used for collecting and analyzing data volume signals, and the analog quantity module is connected with the communication module and used for collecting and preprocessing analog quantity signals.

Description

Technical Field

[0001] The present invention relates to the field of wind power generation, and in particular to a wind turbine tower load and attitude detection device based on light sensing signal difference calculation. Background Art

[0002] With the promotion of my country's policy of vigorously advocating the development of clean energy, wind power generation has become one of the mainstream ways to produce clean energy. During the service life of wind turbines, the monitoring of the tower load and operating posture of wind turbines can further reflect the health status of wind turbines. At present, there are few means of monitoring the tower load and posture of existing wind turbines, and few existing installed units have introduced such technical means. Summary of the invention

[0003] The present invention provides a wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation, which is used to solve the technical problems existing in the above-mentioned prior art.

[0004] To achieve the above-mentioned purpose, the present invention provides a wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation, which includes: a main control system, multiple light path signal generating devices and multiple light path signal receiving devices, wherein:

[0005] The main control system includes display screen, programmable controller, communication module, digital quantity module, analog quantity module, photoelectric signal transceiver conversion module and data fidelity processing module.

[0006] The display screen is electrically connected to the communication module. The display screen has a human-computer interaction interface. The display screen is used to display current data and historical data and to set various functions of the main control system.

[0007] The programmable controller is connected to the communication module to run the program inside the main control system and perform internal data processing, and communicate and issue control instructions through the communication module.

[0008] The digital quantity module is connected to the communication module to collect and analyze data quantity signals.

[0009] The analog module is connected to the communication module and is used for analog signal acquisition and preprocessing.

[0010] The communication module is connected to the programmable controller and the data fidelity processing module for signal communication.

[0011] The photoelectric signal transceiver conversion module is connected to the optical path signal generating device, the optical path signal receiving device and the data fidelity processing module, and is used for command control, signal acquisition and photoelectric signal conversion of the optical path signal generating device and the optical path signal acquisition device.

[0012] The data fidelity processing module is connected to the communication module and the photoelectric signal transceiver conversion module to optimize the signal and filter out clutter.

[0013] Multiple optical path signal generating devices are installed on the inner wall of the tower and are installed symmetrically in the horizontal direction.

[0014] Multiple optical path signal receiving devices are installed on the inner wall of the tower and are symmetrically installed in the horizontal direction. Each optical path signal receiving device has a first surface and a second surface relative to each other. The first surface and the second surface are both provided with multiple micro-photosensitive elements. Each optical path signal receiving device is provided with corresponding optical path signal generating devices on both sides of the radial direction of the inner wall of the tower.

[0015] In one embodiment of the present invention, a plurality of micro-photosensitive elements inside each optical path signal receiving device are arranged in an array.

[0016] In one embodiment of the present invention, the plurality of micro-photosensitive elements inside each optical path signal receiving device are arranged in a rectangular array or a ring array.

[0017] The wind turbine tower load and attitude detection device based on array-type photosensitive signal difference calculation provided by the present invention realizes the tower load and attitude monitoring under all states (operation, standby, maintenance, etc.) of the wind turbine set. The tower load and attitude can be monitored in real time at any time and under any environmental conditions. The monitoring data can further feedback the current health status of the set. When overloaded or in a dangerous attitude, it can trigger the main control system to alarm and control the set, thereby further improving the safety protection level of the wind turbine set. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a wind turbine tower load and posture detection device based on array-type light-sensing signal difference calculation according to an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of the structure of a main control system according to an embodiment of the present invention;

[0021] Figure 3 A schematic diagram of the arrangement of multiple optical path signal receiving devices according to an embodiment of the present invention;

[0022] Figure 4FIG. 4 is a schematic diagram of a single optical path signal receiving device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] like Figure 1 The figure shows a schematic diagram of the structure of a wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation according to an embodiment of the present invention. The present invention provides a wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation, which includes: a main control system 001, a plurality of light path signal generating devices (201-1 to 201-6) and a plurality of light path signal receiving devices (301-1 to 301-4), wherein:

[0025] like Figure 2 FIG. 1 is a schematic diagram of the structure of a main control system according to an embodiment of the present invention. The main control system 001 includes a display screen, a programmable controller, a communication module, a digital quantity module, an analog quantity module, an optoelectronic signal transceiver conversion module, and a data fidelity processing module.

[0026] The display screen is electrically connected to the communication module. The display screen has a human-computer interaction interface. The display screen is used to display current data and historical data and to set various functions of the main control system.

[0027] The programmable controller is connected to the communication module and is used to run the program inside the main control system and perform internal data processing, and to communicate and issue control instructions through the communication module. The role and achievable functions of the programmable controller in this case are well known to those skilled in the art and can be implemented based on the existing technology, and will not be elaborated here.

[0028] The digital quantity module is connected to the communication module to collect and analyze data quantity signals.

[0029] The analog module is connected to the communication module and is used for analog signal acquisition and preprocessing.

[0030] Specifically, the digital quantity module in the present invention is used to collect switch quantity signals and feed them back to the main control system for analysis and processing, and output the switch quantity instructions issued by the main control system. The analog quantity module is used to collect analog quantity signals and feed them back to the control system for analysis and processing, and output the analog quantity instructions issued by the control system.

[0031] The communication module is connected to the programmable controller and the data fidelity processing module for signal communication.

[0032] The photoelectric signal transceiver conversion module is connected to the optical path signal generating device, the optical path signal receiving device and the data fidelity processing module, and is used for command control, signal acquisition and photoelectric signal conversion of the optical path signal generating device and the optical path signal acquisition device.

[0033] The data fidelity processing module is connected to the communication module and the photoelectric signal transceiver conversion module to optimize the signal and filter out clutter.

[0034] Multiple optical path signal generating devices are installed on the inner wall of the tower 011 and are installed symmetrically in the horizontal direction. The optical path signal generating devices should be implemented with components with strong optical path penetration ability to improve the reliability of the device. The optical path signal generating devices are used to generate optical path signals, and under the control of the main control system, they simultaneously transmit optical path signals to optical path signal receiving devices at different positions according to the preset pulse interval time.

[0035] A plurality of optical path signal receiving devices are installed on the inner wall of the tower 011 and are installed symmetrically in the horizontal direction, and are used to receive the optical path signal emitted by the optical path signal generating device. Each optical path signal receiving device has a first surface and a second surface (i.e., the first surface and the second surface mentioned below) opposite to each other. Figure 1 The upper receiving surface and the lower receiving surface in the tower are provided with a plurality of micro-photosensitive elements on the first surface and the second surface, and the micro-photosensitive elements are independent of each other. Each optical path signal receiving device is provided with corresponding optical path signal generating devices on both sides of the radial direction of the inner wall of the tower.

[0036] like Figure 3 The figure shows a schematic diagram of the arrangement of multiple optical path signal receiving devices according to an embodiment of the present invention. This figure is a top view showing the distribution state of the optical path signal receiving devices on the cross section of the tower. It can be seen that the multiple optical path signal receiving devices are symmetrical in pairs and are evenly distributed on the circumference of the inner wall of the tower. Figure 3 There are a total of 8 optical path signal receiving devices on the circumference shown. In actual implementation, the number of optical path signal receiving devices on the circumference can be increased or decreased as needed. The more optical path signal receiving devices on the same circumference, the higher the detection accuracy of the wind turbine tower load and posture detection.

[0037] The optical path signal generating devices located on the same circumference are called a group. Similarly, the optical path signal receiving devices located on the same circumference are also called a group. Increasing the number of optical path signal generating devices and optical path signal receiving devices installed along the radial direction of the tower can improve the ability to detect the load and posture of the wind turbine tower. Figure 1As shown, 201 and 301 are arranged along the inner wall of tower 011 in correspondence, and two 201 are arranged symmetrically above and below each 301. Both sides of each 301 can receive the optical path signal emitted by 201. 201-1 and 201-3 are symmetrically installed on 301-1, 201-2 and 201-4 are symmetrically installed on 301-2, and 301-1 and 301-2 are symmetrically installed around the 011 tower horizontally. The spacing between the symmetrical installations can be adjusted according to the technical accuracy requirements.

[0038] 201-1 emits two light paths, one to the micro-photosensitive unit at the center of the receiving surface of 301-1, and the other to the micro-photosensitive unit at the center of the receiving surface of 301-2. Similarly, 201-2 emits two light paths, one to the micro-photosensitive unit at the center of the receiving surface of 301-2, and the other to the micro-photosensitive unit at the center of the receiving surface of 301-1.

[0039] 201-3 emits two light paths, one to the micro-photosensitive unit at the center of the lower receiving surface of 301-1, and the other to the micro-photosensitive unit at the center of the lower receiving surface of 301-2. Similarly, 201-4 emits two light paths, one to the micro-photosensitive unit at the center of the lower receiving surface of 301-2, and the other to the micro-photosensitive unit at the center of the lower receiving surface of 301-1.

[0040] In one embodiment of the present invention, the plurality of micro-photosensitive elements inside each optical path signal receiving device are arranged in an array, for example, the plurality of micro-photosensitive elements inside each optical path signal receiving device are arranged in a rectangular array or a ring array, such as Figure 4 The figure shows a schematic diagram of a single optical path signal receiving device according to an embodiment of the present invention. Each rectangle in the figure is a micro-photosensitive element, and the micro-photosensitive elements are arranged in a neat array.

[0041] The process of detecting the load and posture of the wind turbine tower of the present invention is as follows:

[0042] The position code of each micro-photosensitive element has been stored in the main control system. After the device is installed and started, the installation positions of the various components of the device on the tower are fixed, so the position information sent back by each 301 should be fixed in the static state. When the wind turbine is blown by the wind, the tower will shake and bend radially. In the bending direction, the tower will be slightly compressed, and the other side will be slightly stretched. When the radial section of the tower is bent, because light propagates in a straight line, the position of the light path emitted by each 201 on 301 will change. The initial installation positions of 301 and 201 and the spacing between the micro-photosensitive elements of 301 are all known data. The optical path offset position can be calculated by differential calculation. Combined with these data, the equivalent load and posture of the tower of the installation section can be calculated. The load state and posture of the entire tower 011 can be calculated by combining the data of each optical path signal generating device and optical path signal receiving device.

[0043] Simple calculation method: Take the 201-1 optical path signal generating device and the 301-1 and 301-2 optical path signal receiving devices as examples; when the wind turbine is stationary, adjust the installation so that the 201-1 optical path vertically irradiates the micro-photosensitive element at the center of 301-1 and is set to X01, and the 201-1 optical path irradiates the micro-photosensitive element at the center of 301-2 and is set to X02. 301-1 and 301-2 are installed horizontally. When the wind turbine does not swing, the 201-1 optical path always irradiates the center of 301-1 and 301-2. When the tower is affected by the wind and swings, the tower will bend, and 201-1 will deviate from the top of the center of 301-1. Because light propagates in a straight line, the optical path of 201-1 will deviate from The center position of 301-1 and 301-2, the micro-photosensitive elements irradiated at other positions outside the center point of 301-1 are set to X11, and the micro-photosensitive elements irradiated at other positions outside the center point of 301-2 are set to X12. Because the spacing of the micro-photosensitive elements at each position of the array on 301-1 and 301-2 is fixed, the main control system can know the relative position difference between X01 and X11, X02, X12 by reading the position codes of X01 and X11 on 301-1 and the position codes of X02 and X12 on 301-2. When the wind turbine is stationary, 201-1 and X01, X02 form a triangle, and when the wind turbine swings and the tower is bent, 201-1 and X11, X12 form a triangle. 301-1 and 301-2 are installed on the same plane. When the tower is bent, 201-1 will be offset relative to 301-1 and 301-2. Combined with the installation vertical spacing of 201-1 and 301-1, 301-2 when stationary, the relative position difference between X01 and X11, X02, X12, and the horizontal spacing between 301-1 and 301-2, the offset of 201-1 relative to 301-1, 301-2 when the tower is bent can be calculated. The calculation of other positions 201 and 301 is similar.

[0044] Install multiple groups of 201 and 301 along the radial direction of the tower, and start counting from the group at the bottom of the tower. When the wind turbine is bent, add up the offset of each group of 201, which is the offset of 201 at the highest position of the entire tower.

[0045] The wind turbine tower load and attitude detection device based on array-type photosensitive signal difference calculation provided by the present invention realizes the tower load and attitude monitoring under all states (operation, standby, maintenance, etc.) of the wind turbine set. The tower load and attitude can be monitored in real time at any time and under any environmental conditions. The monitoring data can further feedback the current health status of the set. When overloaded or in a dangerous attitude, it can trigger the main control system to alarm and control the set, thereby further improving the safety protection level of the wind turbine set.

[0046] Those skilled in the art can understand that the accompanying drawings are only schematic diagrams of an embodiment, and the modules or processes in the accompanying drawings are not necessarily required to implement the present invention.

[0047] Those skilled in the art can understand that the modules in the device in the embodiment can be distributed in the device in the embodiment according to the description of the embodiment, or can be changed accordingly and located in one or more devices different from the embodiment. The modules in the above embodiment can be combined into one module, or can be further divided into multiple sub-modules.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation, characterized in that: include: A main control system, a plurality of optical path signal generating devices and a plurality of optical path signal receiving devices, wherein: The main control system includes display screen, programmable controller, communication module, digital quantity module, analog quantity module, photoelectric signal transceiver conversion module and data fidelity processing module. The display screen is electrically connected to the communication module. The display screen has a human-computer interaction interface. The display screen is used to display current data and historical data and to set various functions of the main control system. The programmable controller is connected to the communication module to run the program inside the main control system and perform internal data processing, and communicate and issue control instructions through the communication module. The digital quantity module is connected to the communication module to collect and analyze data quantity signals. The analog module is connected to the communication module and is used for analog signal acquisition and preprocessing. The communication module is connected to the programmable controller and the data fidelity processing module for signal communication. The photoelectric signal transceiver conversion module is connected to the optical path signal generating device, the optical path signal receiving device and the data fidelity processing module, and is used for command control, signal acquisition and photoelectric signal conversion of the optical path signal generating device and the optical path signal acquisition device. The data fidelity processing module is connected to the communication module and the photoelectric signal transceiver conversion module to optimize the signal and filter out clutter. Multiple optical path signal generating devices are installed on the inner wall of the tower and are installed symmetrically in the horizontal direction. Multiple optical path signal receiving devices are installed on the inner wall of the tower and are symmetrically installed in the horizontal direction. Each optical path signal receiving device has a first surface and a second surface relative to each other. The first surface and the second surface are both provided with multiple micro-photosensitive elements. Each optical path signal receiving device is provided with corresponding optical path signal generating devices on both sides of the radial direction of the inner wall of the tower.

2. The wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation according to claim 1 is characterized in that: The multiple micro-photosensitive elements inside each optical path signal receiving device are arranged in an array.

3. The wind turbine tower load and attitude detection device based on array-type light-sensing signal difference calculation according to claim 2 is characterized in that: The multiple micro-photosensitive elements inside each optical path signal receiving device are arranged in a rectangular array or a ring array.

Images