A monitoring system for airborne laser wind radar

Abstract

The present invention discloses a monitoring system for an airborne laser wind measuring radar. The monitoring system comprises an autonomous analysis unit and a detection unit installed inside the laser radar, wherein the detection unit comprises: a wind speed monitoring module for monitoring wind direction and wind speed information in front of a wind turbine; a laser intensity detection module for performing real-time detection of the intensity and transmittance of the laser emitted by the laser radar to analyze whether the laser is operating normally; and a main beam angle detection module for detecting the main beam angle of the laser emitted by the laser radar. Through the design of the present invention, it is possible to monitor and record the wind speed and wind volume at the same time as monitoring the wind speed, so as to analyze the wind volume distribution in the area, thereby facilitating in-depth analysis of the area by later staff. During use, the working condition of the laser radar can be monitored, and an alarm can be issued in time if the monitoring accuracy is not high.

Description

Technical Field

[0001] The invention belongs to the technical field of monitoring radars, and in particular relates to a monitoring system for an airborne laser wind measuring radar. Background Art

[0002] The airborne laser wind measurement radar can measure the wind direction and speed information 80 meters in front of the wind turbine. It can be integrated with the wind turbine main control system. The measured wind direction and speed information in front of the wind turbine can be transmitted to the wind turbine main control system in real time before the wind reaches the wind rotor. Obtaining the correct wind direction information can ensure the correct yaw of the wind turbine, thereby increasing the power generation of the wind turbine and reducing the load on key components.

[0003] The existing monitoring system has a single function when in use and can only monitor the wind speed. In actual use, it has great limitations and cannot meet diverse needs. At the same time, it is also unable to monitor and warn of possible failures that may occur during the use of the radar. Therefore, there is room for improvement. Summary of the Invention

[0004] The object of the present invention is to provide a monitoring system for an airborne laser wind radar to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a monitoring system for an airborne laser wind radar, the monitoring system comprising an autonomous analysis unit and a detection unit installed inside the laser radar, wherein the detection unit comprises:

[0006] Wind speed monitoring module, used to monitor wind direction and speed information in front of the wind turbine;

[0007] Laser intensity detection module, used to detect the laser intensity and transmittance emitted by the lidar in real time and analyze whether the laser is operating normally;

[0008] The main beam angle detection module is used to detect the main beam angle of the laser emitted by the lidar and determine the installation angle between the lidar and the wind turbine based on the angle change;

[0009] The light spot monitoring module is used to monitor the light spot directionality and focus position during the laser radar flight process;

[0010] The scattered light angle monitoring module is used to monitor the change in the refraction angle of the scattered light emitted by the laser radar after it contacts the laser radar lens, and the flatness of the laser radar lens is reflected by the angle change;

[0011] The autonomous analysis unit includes:

[0012] Air volume recording and analysis module, used to monitor the size of the air volume;

[0013] The time recording and analysis module is used in conjunction with the air volume recording and analysis module to record and collect the air volume in a certain period of time;

[0014] Regional record analysis module, used to determine the altitude and geographical location of the lidar;

[0015] The autonomous analysis unit generates the wind volume in the specified area by collecting wind volume record analysis module, time record analysis module and area record analysis module, and generates a chart for staff to analyze the wind volume situation in the area.

[0016] As a preferred technical solution in the present invention, the main light of the laser radar is a beam of light that is overlapping or parallel with the laser emitting end as the center, and the diameter of the beam is 1 to 1.5 times the diameter of the laser emitting end.

[0017] As a preferred technical solution in the present invention, the scattered light of the laser radar is a light beam that diffuses toward the outside of the laser emitting end, wherein the beam intensity of the scattered light is weaker than the beam intensity of the main light.

[0018] As a preferred technical solution in the present invention, the charts generated by the autonomous analysis unit include line charts and bar charts, wherein the autonomous analysis unit makes comparison charts of the information collected multiple times according to each hour, day, month and year.

[0019] As a preferred technical solution in the present invention, the regional record analysis module is connected to a high-precision GPS positioning module for determining the spatial position of the laser radar. The positioning accuracy of the high-precision GPS positioning module is 0.5 to 1.5 meters.

[0020] As a preferred technical solution in the present invention, it also includes a dynamic yaw correction module, which is used to form a fan-shaped monitoring area 80 meters in front of the laser radar to monitor the lateral wind volume.

[0021] As a preferred technical solution in the present invention, the output ends of the autonomous analysis unit, dynamic yaw correction module and monitoring unit are connected to a communication module via cables, and the output end of the communication module is connected to a control unit, wherein the control unit and the communication module are both built into the wind turbine.

[0022] As a preferred technical solution in the present invention, the control unit is connected to a background terminal via wireless and / or cable, and the background terminal is used to receive all information collected by the laser radar.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] Through the design of the present invention, while monitoring the wind speed, the wind speed and wind volume can also be monitored and recorded, so as to analyze the wind volume distribution in the area, thereby facilitating in-depth analysis of the area by later staff. At the same time, during use, the working conditions of the laser radar can be monitored. Once the monitoring accuracy is low, an alarm can be issued in time to prompt the staff to perform maintenance, thereby ensuring accurate monitoring of the wind speed in the later period. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system diagram of the present invention. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] See also Figure 1 The present invention provides a technical solution: a monitoring system for an airborne laser wind radar, the monitoring system comprising an autonomous analysis unit and a detection unit installed inside the laser radar. Through the design of the present invention, the system can monitor and record the wind speed and wind volume while monitoring the wind speed, thereby analyzing the wind volume distribution in the area, thereby facilitating subsequent in-depth analysis of the area by staff. The detection unit comprises:

[0029] Wind speed monitoring module, used to monitor wind direction and speed information in front of the wind turbine;

[0030] Laser intensity detection module, used to detect the laser intensity and transmittance emitted by the lidar in real time and analyze whether the laser is operating normally;

[0031] The main beam angle detection module is used to detect the main beam angle of the laser radar. It determines the installation angle between the laser radar and the wind turbine by changing the angle and provides auxiliary installation. In actual use, a laser receiving end should be added to the center of the wind turbine. When the laser receives the main beam, it means that the laser radar is in the installation position.

[0032] The light spot monitoring module is used to monitor the light spot directionality and focus position of the LiDAR laser during flight to prevent the light spot from being too large and affecting the monitoring accuracy;

[0033] The scattered light angle monitoring module is used to monitor the change in the refraction angle of the scattered light emitted by the laser radar after it contacts the laser radar lens. The angle change reflects the flatness of the laser radar lens and can monitor the working condition of the laser radar. If the monitoring accuracy is low, it can promptly issue an alarm to prompt the staff to perform maintenance, thereby ensuring accurate monitoring of wind speed in the future.

[0034] The autonomous analysis unit includes:

[0035] Air volume recording and analysis module, used to monitor the size of the air volume;

[0036] The time recording and analysis module is used in conjunction with the air volume recording and analysis module to record and collect the air volume in a certain period of time;

[0037] Regional record analysis module, used to determine the altitude and geographical location of the lidar;

[0038] The autonomous analysis unit generates the wind volume in the specified area by collecting data from the wind volume record analysis module, time record analysis module and area record analysis module, and generates a chart for the staff to analyze the wind volume situation in the area.

[0039] In this embodiment, the main light of the laser radar is a beam of light that is centered at the laser emitting end and is overlapping or parallel, and the diameter of the beam is 1 times the diameter of the laser emitting end.

[0040] In this embodiment, the scattered light of the laser radar is a light beam that spreads outward from the laser emitting end, wherein the beam intensity of the scattered light is weaker than the beam intensity of the main light.

[0041] In this embodiment, the charts generated by the autonomous analysis unit include line charts and bar charts, wherein the autonomous analysis unit generates comparative charts for information collected multiple times hourly, daily, monthly, and annually.

[0042] In this embodiment, the regional record analysis module is connected to a high-precision GPS positioning module for determining the spatial position of the laser radar. The positioning accuracy of the high-precision GPS positioning module is 0.5 meters.

[0043] This embodiment also includes a dynamic yaw correction module, which is used to form a fan-shaped monitoring area 80 meters in front of the laser radar to monitor the lateral wind volume.

[0044] In this embodiment, the output ends of the autonomous analysis unit, the dynamic yaw correction module and the monitoring unit are connected to a communication module via cables, and the output end of the communication module is connected to a control unit, wherein the control unit and the communication module are both built into the wind turbine.

[0045] In this embodiment, the control unit is connected to a background terminal via wireless and / or cable, and the background terminal is used to receive all information collected by the laser radar.

[0046] Example 2

[0047] In this embodiment, the main light of the laser radar is a beam of light that is centered at the laser emitting end and is overlapping or parallel, and the diameter of the beam is 1.2 times the diameter of the laser emitting end.

[0048] In this embodiment, the regional record analysis module is connected to a high-precision GPS positioning module for determining the spatial position of the laser radar. The positioning accuracy of the high-precision GPS positioning module is 0.7 meters.

[0049] Example 3

[0050] In this embodiment, the main light of the laser radar is a beam of light that is centered at the laser emitting end and is overlapping or parallel, and the diameter of the beam is 1.5 times the diameter of the laser emitting end.

[0051] In this embodiment, the regional record analysis module is connected to a high-precision GPS positioning module for determining the spatial position of the laser radar. The positioning accuracy of the high-precision GPS positioning module is 1.5 meters.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring system for an airborne laser wind radar, characterized in that: The monitoring system includes an autonomous analysis unit and a detection unit installed inside the lidar, where the detection unit includes: Wind speed monitoring module, used to monitor wind direction and speed information in front of the wind turbine; Laser intensity detection module, used to detect the laser intensity and transmittance emitted by the lidar in real time and analyze whether the laser is operating normally; The main beam angle detection module is used to detect the main beam angle of the laser emitted by the lidar and determine the installation angle between the lidar and the wind turbine based on the angle change; The light spot monitoring module is used to monitor the light spot directionality and focus position during the laser radar flight process; The scattered light angle monitoring module is used to monitor the change in the refraction angle of the scattered light emitted by the laser radar after it contacts the laser radar lens, and the flatness of the laser radar lens is reflected by the angle change; The autonomous analysis unit includes: Air volume recording and analysis module, used to monitor the size of the air volume; The time recording and analysis module is used in conjunction with the air volume recording and analysis module to record and collect the air volume in a certain period of time; Regional record analysis module, used to determine the altitude and geographical location of the lidar; The autonomous analysis unit generates the wind volume in the specified area by collecting wind volume record analysis module, time record analysis module and area record analysis module, and generates a chart for staff to analyze the wind volume situation in the area.

2. The airborne laser wind radar monitoring system according to claim 1, characterized in that: The main light of the laser radar is a beam of light that is centered on the laser emitting end and is overlapping or parallel, and the diameter of the beam is 1 to 1.5 times the diameter of the laser emitting end.

3. The airborne laser wind radar monitoring system according to claim 1, characterized in that: The scattered light of the laser radar is a light beam that spreads outward from the laser emitting end, wherein the beam intensity of the scattered light is weaker than the beam intensity of the main light.

4. The airborne laser wind radar monitoring system according to claim 1, characterized in that: The charts generated by the autonomous analysis unit include line charts and bar charts, wherein the autonomous analysis unit makes comparison charts of the information collected multiple times according to hourly, daily, monthly and annual periods.

5. The airborne laser wind radar monitoring system according to claim 1, characterized in that: The regional record analysis module is connected to a high-precision GPS positioning module for determining the spatial position of the laser radar. The positioning accuracy of the high-precision GPS positioning module is 0.5 to 1.5 meters.

6. The airborne laser wind radar monitoring system according to claim 1, characterized in that: It also includes a dynamic yaw correction module, which is used to form a fan-shaped monitoring area 80 meters in front of the lidar to monitor the lateral wind volume.

7. The airborne laser wind radar monitoring system according to claim 1, characterized in that: The output ends of the autonomous analysis unit, dynamic yaw correction module and monitoring unit are connected to a communication module via cables, and the output end of the communication module is connected to a control unit, wherein the control unit and the communication module are both built into the wind turbine.

8. The airborne laser wind radar monitoring system according to claim 7, characterized in that: The control unit is connected to a background terminal via wireless and / or cable, and the background terminal is used to receive all information collected by the laser radar.

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