IOT-based wind power generation blade range radar device

Abstract

A wind power generation blade range radar device based on the Internet of Things comprises a radar module, an IOT communication module, a battery module, a solar charging module, an IOT host module and a rubber cable. A sensor part is composed of a radar module, an IOT communication module, a battery module, a solar charging module and a rubber cable, the sensor part is installed on a tower column, the solar charging module charges the battery module, the radar module, the IOT communication module and the battery module are wrapped in the rubber cable, and the solar charging module is arranged on the surface layer of the cable and wrapped by a transparent layer. The IOT host module is located at the tower top, interacts with the wind power generation set and provides information for control of the wind power generation set, the radar module completes distance measurement by transmitting and receiving millimeter wave frequency modulation continuous waves, distance measurement information is transmitted to the IOT host through the IOT communication module, and the IOT host summarizes the information and sends the information to the wind power generation set for control. The radar module carries out distance measurement by emitting linear frequency modulation continuous waves and adopting multiple modes.

Description

[0001] This application is a divisional application of the invention patent application with the application number 202011470380.7, the application date of December 14, 2020, and the invention name of "IOT-based wind power blade ranging radar device". TECHNICAL FIELD

[0002] The present application relates to the technical field of wind power equipment components in new energy power systems, in particular to a wind power blade ranging radar device, and specifically to a new IOT-based wind power blade ranging radar system, which can be used in wind turbine generators of power systems. BACKGROUND

[0003] In recent years, with the rapid development of new energy power generation systems, wind power has been extensively researched and constructed. Under the environment of new energy construction, the power of single wind power equipment is gradually increasing, and the size of the blades of the power generation system is gradually growing. At the same time, due to the limitations of cost and weight, new materials are used to manufacture the blades. With the increase of wind speed, the stress on the blades is huge, and the blades are easy to bend during rotation, which can easily hit the wind turbine tower and cause damage to the unit, resulting in significant losses. Therefore, all-weather and all-climate testing of the distance between the blades and the tower is necessary for modern wind power systems. Using the distance information obtained by testing, the generator unit can control the system in real time, even stop safely, so as to ensure the safe operation of the wind power system. Under this background, the millimeter wave radar ranging system with great advantages has become a research hotspot.

[0004] Generally, the millimeter wave radar ranging system is applied to the wind blade ranging system, the frequency modulation continuous wave (FMCW) is transmitted by the millimeter wave radar to obtain the position information of the target, the millimeter wave radar is usually installed at the top of the tower, the FMCW signal is transmitted by the millimeter wave radar to the wind blade located at 80-100 meters, and the linear distance and angle of the blade are measured. After the linear distance and angle of the blade are measured, the distance between the blade and the tower can be indirectly estimated through coordinate transformation. The current scheme has several major problems, one is the distance test accuracy at 80-100 meters, because the millimeter wave is obliquely incident on the blade, the incidence angle (defined as the angle between the wave vector and the horizontal plane of the blade) is very small at a long distance, the radar reflection interface (RCS) is very small at this time, which leads to a low level of return power, which will reduce the test accuracy of the radar system. Another problem is that the angle measurement accuracy at 80-100 meters is difficult to guarantee, because the transmitting and receiving antenna aperture of the current radar system is limited, the angle resolution is generally about 5 degrees, the angle error under this test accuracy is large, which is difficult to meet the system accuracy requirement. The last problem is that the entire millimeter wave radar of the wind blade needs to be placed at the top of the tower, due to the limitation of the installation position, when the wind blade and the tower column coincide, the tower column will block the millimeter wave, and the distance between the wind blade and the tower column cannot be measured, so the distance between the wind blade and the tower column measured by the general millimeter wave radar is not the direct distance, which will cause test error and cause a certain degree of system error, therefore, a new millimeter wave radar system capable of accurately measuring the distance between the wind blade and the tower column needs to be proposed. SUMMARY

[0005] The application discloses a wind power blade ranging radar device based on Internet of Things, and provides a new wind blade ranging system design scheme, which has the characteristics of high reliability, easy implementation, low cost, low power consumption, high performance and easy batch production.

[0006] The wind power blade ranging radar device based on Internet of Things comprises millimeter wave radar modules in multiple detection directions, an IOT communication module, a battery module, a solar charging module, an IOT host module and a rubber cable. The millimeter wave radar modules, the IOT communication module and the battery module are uniformly wrapped in the rubber cable, the solar charging module is wrapped by a transparent plastic layer on the surface of the rubber cable, and the IOT host module is located at the top of the tower and exchanges information with a wind power generator set to provide information for control of the wind power generator set. The millimeter wave module completes accurate ranging of blades in the area by transmitting and receiving millimeter wave frequency modulation continuous waves, ranging information is transmitted to the IOT host in real time through the IOT communication module, the IOT host sends the information to the wind power generator set for control of the set, and the entire design is powered by the solar cell through the low-power design of the IOT and can work for a long time with high reliability.

[0007] In one embodiment, the system uses multiple low-cost millimeter wave radar modules, which complete the blade ranging function.

[0008] In one embodiment, the radar device and IOT communication module are included in the rubber cable, and the solar charging module is located on the surface of the rubber cable.

[0009] In one embodiment, the radar module can work in the millimeter wave frequency band, such as 60GHz, 77GHz, etc.

[0010] In one embodiment, the radar module completes the ranging function by transmitting a linear frequency continuous wave, and the radar module uses one transmitting and one receiving, multiple transmitting and multiple receiving, and other modes for distance measurement.

[0011] In one embodiment, the radar module adopts the form of on-chip antenna, and the antenna pattern is a single patch antenna pattern, with horizontal and pitch coverage angles of plus or minus 45 degrees. Through the mutual work of multiple radar modules, a range of 360 degrees is covered.

[0012] In one embodiment, the radar module and the IOT communication module both work in a low-power consumption condition, and the entire device is powered by a battery and charged by solar energy.

[0013] In one embodiment, the IOT terminal located in the cable and the IOT host located on the tower transmit in real time through wireless signals, and the IOT host transmits distance information to the console in real time after integrating the ranging information of the entire radar.

[0014] In one embodiment, the radar module and the IOT communication module are wrapped in waterproof, corrosion-resistant, wear-resistant, and other materials such as rubber and plastic.

[0015] In one embodiment, the installation method of the entire device is one-time installation, and no maintenance is required in the later period.

[0016] In one embodiment, in order to save power consumption, the radar device can receive information from the control host and enter a sleep state.

[0017] In one embodiment, the entire device has the characteristics of low cost, and the radar module and the IOT communication module adopt a super-low-cost scheme, and the outer surface is wrapped in a one-time forming design after mold opening, achieving high reliability and low cost.

[0018] The above-mentioned wind power blade ranging radar device based on the Internet of Things adopts a low-cost millimeter wave radar and an Internet of Things system, the millimeter wave radar directly measures the distance of the wind power blade and the tower column through real-time transmission and reception of a linear frequency modulation continuous wave, because the distance is far less than 80m-100m in the direct measurement test, the signal-to-noise ratio of the whole radar signal of the present application is much higher than that of the traditional method, the overall system scheme can be simplified, and excellent performance can be achieved. At the same time, the present application adopts the method of IOT, which can greatly reduce the overall cost. By installing a battery and a solar charging device at one time, the wind power blade ranging system based on the Internet of Things can work reliably for 24 hours. Therefore, the new wind power blade ranging radar device has the characteristics of high performance, easy production, low cost, low power consumption, etc., and can be widely applied to land-based and sea-based wind turbine generators. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 An installation position view of the wind power blade ranging radar device based on the Internet of Things provided for the present application;

[0020] Figure 2 An installation position front view of the wind power blade ranging radar device based on the Internet of Things provided for the present application;

[0021] Figure 3 For Figure 1 The structure diagram of the sensor part (2) of the wind power blade ranging radar device based on the Internet of Things in the present application;

[0022] Figure 4 For Figure 3 A distribution form diagram of the on-chip antenna of the millimeter wave radar module (2-1) in the present application.

[0023] Figure 5 For Figure 4 The directional diagram of the on-chip antenna of the millimeter wave radar module in the present application;

[0024] Figure 6 For Figure 3 The transmission waveform and working mode diagram of the millimeter wave radar module in the present application; DETAILED DESCRIPTION

[0025] In order to facilitate the understanding of the present application, the present application will be described in detail below in combination with the drawings and embodiments. The drawings show some embodiments of the present application, but not all embodiments. The present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0027] Embodiment

[0028] Figure 1 An installation position diagram of a wind power blade ranging radar device based on Internet of Things, Figure 2 An installation position front view of a wind power blade ranging radar device based on Internet of Things provided for an example of the present application, as Figure 1 And Figure 2 shown, the sensor part (2) of the wind power blade ranging radar device based on Internet of Things is installed on the tower column (1), the IOT host (4) of the device is installed on the tower platform (5), the sensor part (2) tests the distance between the tower column (1) and the wind blade (2) by transmitting and receiving linear frequency continuous wave signals through the millimeter wave radar, the IOT terminal in the sensor part (2) communicates with the IOT host (4) on the tower platform (5), and the IOT host (4) sends the distance information between the tower column (1) and the wind blade (2) to the wind power generation system after summarizing the overall information of the sensor part (2). The wind power generation equipment controls the wind blade (2) through the distance information.

[0029] Figure 3 It is Figure 1 The structural diagram of the sensor part (2) of the wind power blade ranging radar device based on Internet of Things in Figure 1 The sensor part (2) is composed of multiple millimeter wave radar modules (2-1) with detection directions, IOT communication modules (2-2), battery modules (2-3), solar charging modules (2-4), and rubber cables (2-5). The multiple millimeter wave radar modules (2-1) with detection directions work at 60GHz-65GHz, can transmit and receive linear frequency continuous wave, and can output Figure 1IOT host (2-3) communication, mainly for reporting distance information; battery module (2-3) for millimeter wave radar module (2-1) and IOT communication module (2-2) and other electronic devices power supply; solar charging module (2-4) by receiving solar charging battery module (2-3), to ensure that the whole system can work for a long time 24 hours. In order to achieve waterproof and rainproof effect, millimeter wave radar module (2-1), IOT communication module (2-2) and battery module (2-3) wrapped in rubber (2_5) inside, solar charging module (2-4) by transparent material such as plastic wrapped.

[0030] Figure 4 For Figure 3 A distribution form of the on-chip antenna of the millimeter wave radar module (2-1) in the system. The radar works in a transmitting and three receiving states, and the receiving can have horizontal and pitch resolution. In signal processing, the three received signals are processed incoherently, which can increase the signal-to-noise ratio and increase the detection accuracy.

[0031] Figure 5 For Figure 4 The directional diagram of the on-chip antenna of the millimeter wave radar module in the system. The on-chip antenna can cover + / - 45 degrees of detection range, so four groups of sensors can be arranged to complete 360 degree detection. It should be noted here that because the overall sensor cost is low, in order to improve the detection preparation degree, multiple groups of sensors can be arranged, for example, 8 groups of sensors, to complete 360 degree coverage. The size of the sensor is small, and the diameter of the tower column is large. More battery modules (2-3) and solar charging modules (2-4) can be arranged in the empty part to ensure the long-term reliable work of the overall sensor module.

[0032] Figure 6 For Figure 3 The transmitting waveform and working mode of the millimeter wave radar module in the system. The transmitted linear frequency continuous wave sweeps the frequency f s in t s time, and the echo type returns to the radar after t return time. After the processing of the mixer, t return can be obtained as:

[0033]

[0034] Where f b is the intermediate frequency, and the distance R can be further obtained as:

[0035]

[0036] According to the above formula, the distance between the wind blade and the tower column can be directly obtained through a simple fast Fourier operation in the back-end processor, and since the direct distance measurement scheme is adopted, the signal-to-noise ratio of the system is high, and the distance information can be calculated by using a linear frequency modulation continuous wave, and the algorithm requirement is low.

[0037] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0038] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A wind turbine blade ranging radar device based on the Internet of Things, comprising a millimeter-wave radar module with multiple detection directions, an IoT communication module, a battery module, a solar charging module, an IoT host module, and a rubber cable. in, The sensor part is composed of the millimeter-wave radar module with multiple detection directions, the IOT communication module, the battery module, the solar charging module and the rubber cable, and the sensor part is installed on the tower. The solar charging module charges the battery module by receiving solar energy. The millimeter-wave radar module, the IoT communication module, and the battery module are all wrapped in the rubber cable. The solar charging module is wrapped in a transparent plastic layer on the surface of the rubber cable. The IoT host module is located at the top of the tower and exchanges information with the wind turbine to provide information for its control. The millimeter-wave radar module accurately measures the distance between blades within the area by transmitting and receiving millimeter-wave frequency-modulated continuous waves. The ranging information is transmitted in real time to the IoT host via the IoT communication module. The IoT host summarizes the information and sends it to the wind turbine for control. The entire design uses the IoT's low-power design and is powered by the solar-charged battery module, ensuring long-term, high-reliability operation. It is characterized in that the millimeter wave radar module completes the ranging function by transmitting linear frequency modulation continuous waves, and the millimeter wave radar module adopts multiple modes including one transmit and one receive or multiple transmit and multiple receive to perform distance measurement.

2. The wind turbine blade ranging radar device based on the Internet of Things according to claim 1, characterized in that: The system uses multiple low-cost millimeter-wave radar modules to complete the blade ranging function.

3. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 2, characterized in that: The millimeter wave radar module and the IOT communication module are included in the rubber cable, and the solar charging module is located on the surface of the rubber cable.

4. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 3, characterized in that: The millimeter-wave radar module operates in the millimeter-wave frequency bands of 60GHz-65GHz and 77GHz.

5. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 4, characterized in that: This millimeter-wave radar module adopts the form of an on-chip antenna. The antenna pattern is a single patch antenna pattern with a horizontal and pitch coverage angle of plus or minus 45 degrees. Through multiple millimeter-wave radar modules working together, it covers a range of 360 degrees.

6. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 5, characterized in that: The millimeter-wave radar module and the IOT communication module both operate under low power consumption conditions. The entire device is powered by the battery module and charged by solar energy.

7. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 6, characterized in that: The IOT terminal in the cable transmits information to the IOT host at the top of the tower in real time via wireless signals. The IOT host integrates the ranging information of the entire radar and transmits the distance information to the control console in real time.

8. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 7, characterized in that: The materials used to wrap the millimeter wave radar module and the IOT communication module are waterproof, corrosion-resistant and wear-resistant materials including rubber and plastic.

9. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 8, characterized in that: The overall device is installed in a one-time manner and does not require maintenance in the future.

10. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 9, characterized in that: In order to save power consumption, the radar device receives information from the control host and can enter a sleep state.

11. The wind turbine blade ranging radar device based on the Internet of Things according to any one of claims 1 to 10, characterized in that: The entire device has the characteristics of low cost. The millimeter wave radar module and the IOT communication module adopt an ultra-low-cost solution. The outer surface wrapping shape is a one-time molding design after mold opening and polymerization, achieving the goals of high reliability and low cost.

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