Wind speed detection range testing device for laser wind radar

Abstract

The utility model relates to a laser wind measurement radar wind speed detection range testing arrangement, belong to laser wind measurement radar technical field. The utility model discloses electric turntable simulation wind speed, realizes wide range's wind speed simulation through the adjustment motor speed, through 9 reflector and carries out light path to turn over, realizes 50m test distance simulation, the base subassembly and the cover shell subassembly of device integrate reflector subassembly and electric turntable subassembly in an organic whole, form laser wind measurement radar wind speed detection range testing arrangement, convenient to use, simple operation.

Description

Technical Field

[0001] This utility model belongs to the field of laser wind radar technology, specifically relating to a test device for the wind speed detection range of laser wind radar. Background Technology

[0002] Laser wind radar is based on the Doppler effect of light. A laser beam emitted from a light source encounters molecules or aerosols, generating an echo signal. The frequency shift of this echo signal is then used to infer the three-dimensional wind field. Laser wind radar boasts high spatiotemporal resolution, enabling 3D wind field remote sensing. Its detection range extends from a few meters to thousands of kilometers, and it is suitable for various platforms, including ground-based, vehicle-mounted, airborne, shipborne, and spaceborne systems. It is widely used in aerospace, wind power site selection, wind energy assessment, weather forecasting, and national defense.

[0003] In the actual manufacturing process of laser wind measuring radar, it is necessary to test the wind speed detection range (1 m / s to 40 m / s). Traditional testing methods involve outdoor fixed-focus testing (50 m to 70 m) to record the lowest and highest wind speeds in the atmosphere. This method is dependent on weather conditions and can only be conducted in open outdoor areas, resulting in low efficiency and hindering mass production. To adapt to the mass production of laser wind measuring radar and improve the efficiency of wind speed detection range testing, it is necessary to design a low-cost, easy-to-use, highly efficient, and universal laser wind measuring radar wind speed detection range testing device. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is to provide a laser wind radar wind speed detection range testing device, which solves the problems of traditional laser wind radar wind speed detection range testing methods being dependent on weather conditions and having low testing efficiency.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, this utility model provides a laser wind measuring radar wind speed detection range testing device, including a reflector assembly 1, an electric turntable assembly 2, a base assembly 3, and a housing assembly 4. The reflector assembly 1 consists of nine reflectors and a mechanical adjustment mechanism. Each of the nine reflectors is coated with a high-reflectivity film and is fixed to the base assembly 3 by a mirror frame. The reflector receiving the laser light at the laser inlet is reflector one; the reflector receiving the light emitted from reflector one is reflector two; the reflector receiving the light emitted from reflector two is reflector three; the reflector receiving the light emitted from reflector three is reflector four; the reflector receiving the light emitted from reflector four is reflector five; the reflector receiving the light emitted from reflector five is reflector six; the reflector receiving the light emitted from reflector six is ​​reflector seven; the reflector receiving the light emitted from reflector seven is reflector eight; and the reflector receiving the light emitted from reflector eight is reflector nine. The laser light reflected from reflector nine exits from the laser outlet. Reflectors two, four, six, and eight are connected to the electric turntable. Component 2 is located on the same side of base component 3. Reflectors 1, 3, 5, 7, and 9 are located on the other side of base component 3. The center distance between reflectors 1 and 2 is a preset value. Reflector 1 is placed at a preset angle. Reflectors 2 to 8 are placed vertically parallel. Reflector 9 is placed at the same preset angle. The center distance between reflectors on the same side is a fixed value. Electric turntable component 2 consists of a rotating shaft, a turntable, and a motor. The turntable is located at the laser exit position. Adjusting the speed of the motor can adjust the speed of the turntable around the rotating shaft. Base component 3 consists of a welding base, platform 1 for fixing the mirror frame, and platform 2. Platform 1 and platform 2 are located on both sides of the welding base. Reflectors 1, 3, 5, 7, and 9 are located on platform 1. Reflectors 2, 4, 6, and 8 and electric turntable component 2 are located on platform 2. Cover component 4 consists of an aluminum profile frame and cover plates around the aluminum profile frame. The laser entrance is located on one of the cover plates.

[0008] Preferably, all nine mirrors are coated with a 1550nm high-reflectivity film.

[0009] Preferably, the center distance between reflector one and reflector two is 5m, reflector one is placed at an angle of 1.5°, reflector nine is placed at an angle of 1.5° in the opposite direction, and the center distance between reflectors on the same side is 0.524m.

[0010] Preferably, the welding base is made of H-beams and steel plates welded together.

[0011] Preferably, the welding base is made of H-beam HM200x150 welded to a steel plate.

[0012] Preferably, the cover plates around the aluminum profile frame are all removable.

[0013] Preferably, the device is capable of receiving laser beams emitted by a laser wind-measuring radar.

[0014] Preferably, the device is used in radar testing.

[0015] The present invention also provides a laser wind-measuring radar based on the device.

[0016] Preferably, this laser wind radar is used in wind energy assessment.

[0017] (III) Beneficial Effects

[0018] This invention uses an electric turntable to simulate wind speed, and achieves a wide range of wind speed simulation by adjusting the motor speed; it uses 9 reflectors to refract the light path and achieve a 50m test distance simulation; the base assembly and cover assembly of the device integrate the reflector assembly and the electric turntable assembly into one, forming a laser wind radar wind speed detection range testing device, which is convenient to use and simple to operate. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the laser wind-measuring radar wind speed detection range device of this utility model;

[0020] Figure 2 This is a schematic diagram of the base assembly of the laser wind measurement radar wind speed detection range device of this utility model;

[0021] Figure 3 This is a schematic diagram of the optical path of the laser wind measurement radar wind speed detection range device of this utility model. Detailed Implementation

[0022] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0023] This invention proposes a laser wind measuring radar wind speed detection range testing device, which can test the wind speed detection range of laser wind measuring radar by simulating wind speed range and distance information.

[0024] refer to Figure 1 , Figure 2 , Figure 3The laser wind speed detection range testing device of this utility model mainly consists of a reflector assembly 1, an electric turntable assembly 2, a base assembly 3, and a housing assembly 4. The reflector assembly 1 consists of 9 reflectors and a mechanical adjustment mechanism. Each of the 9 reflectors is coated with a 1550nm high-reflectivity film and is fixed to the base assembly 3 by a mirror frame. The reflector that receives the laser light at the laser inlet is reflector one, the reflector that receives the light emitted from reflector one is reflector two, the reflector that receives the light emitted from reflector two is reflector three, and the receiving reflector… The reflector four emits light from three different sources; the reflector five receives light emitted from reflector four; the reflector six receives light emitted from reflector five; the reflector seven receives light emitted from reflector six; the reflector eight receives light emitted from reflector seven; and the reflector nine receives light emitted from reflector eight. The laser light reflected from reflector nine exits from the laser outlet. Reflectors two, four, six, and eight are located on the same side of the base assembly 3 as the electric turntable assembly 2. Reflectors one, three, five, seven, and nine are located on the other side of the base assembly 3. Reflectors one and two... The center-to-center spacing is 5m. Reflector 1 is placed at a 1.5° angle, reflectors 2 to 8 are placed vertically parallel, and reflector 9 is placed at a 1.5° angle in the opposite direction. The center-to-center spacing of the reflectors on the same side is 0.524m, thus generating a test distance of approximately 50m. The electric turntable assembly 2 consists of a rotating shaft, a turntable, and a motor. The turntable is located at the laser exit position. The speed of the turntable's movement around the rotating shaft is adjusted by regulating the motor's speed, thereby simulating a wind speed range. The base assembly 3 consists of a welded base, platform 1 for fixing the mirror frame, and platform 2, etc. Platform 1 and Platform 2 are located on both sides of the welding base. Reflectors 1, 3, 5, 7, and 9 are located on Platform 1, while reflectors 2, 4, 6, and 8, along with the electric turntable assembly 2, are located on Platform 2. The welding base is constructed by welding H-beams (HM200x150) to steel plates. This structure has advantages such as high strength, good rigidity, and light weight. The housing assembly 4 consists of an aluminum profile frame and housing sealing plates around the aluminum profile frame. The laser entrance is located on one of the housing sealing plates. All four housing sealing plates are removable, facilitating regular cleaning and maintenance of the reflectors.

[0025] The optical path of the laser wind radar wind speed detection range test device is as follows: Figure 3 As shown, the laser wind measuring radar emits a laser beam, which is then used to locate the laser spot via a laser transducer. The beam is perpendicularly incident on the center of the device's light inlet. The laser wind measuring radar antenna focal length is set to 50m, and the laser spot is focused on the tangential edge of the turntable. By adjusting the turntable's rotation speed to simulate the maximum and minimum radial wind speeds, the frequency values ​​f corresponding to the maximum and minimum speeds can be read and recorded on the wind measuring radar's host computer. d-Max f d-min .

[0026] Based on f d-Max f d-minThe radial maximum and minimum wind speeds of a laser wind radar can be calculated using the laser Doppler frequency shift formula (1):

[0027]

[0028] In the formula, λ is the laser wavelength, taken as 1.55 μm; γ is the scanning angle, designed to be 15.75°; v / / For the radial maximum or minimum wind speed, correspondingly, f d f d-Max or f d-min .

[0029] This invention uses a method of simulating wind speed and testing distance to test the wind speed detection range of laser wind measuring radar. It is convenient and economical to use, greatly improves testing efficiency, and is suitable for mass production of laser wind measuring radar.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A laser wind-measuring radar wind speed detection range testing device, characterized in that, The assembly includes a reflector assembly (1), an electric turntable assembly (2), a base assembly (3), and a housing assembly (4). The reflector assembly (1) consists of nine reflectors and a mechanical adjustment mechanism. Each of the nine reflectors is coated with a high-reflectivity film and is fixed to the base assembly (3) by a mirror frame. The reflector that receives the laser at the laser inlet is reflector one, the reflector that receives the light emitted from reflector one is reflector two, the reflector that receives the light emitted from reflector two is reflector three, the reflector that receives the light emitted from reflector three is reflector four, the reflector that receives the light emitted from reflector four is reflector five, the reflector that receives the light emitted from reflector five is reflector six, the reflector that receives the light emitted from reflector six is ​​reflector seven, the reflector that receives the light emitted from reflector seven is reflector eight, and the reflector that receives the light emitted from reflector eight is reflector nine. The laser reflected by reflector nine is emitted from the laser outlet. Reflectors two, four, six, and eight are located on the same side of the base assembly (3) as the electric turntable assembly (2). Reflectors 1, 3, 5, 7, and 9 are located on the other side of the base assembly (3). The center distance between reflector 1 and reflector 2 is a preset value. Reflector 1 is placed at a preset angle. Reflectors 2 to 8 are placed vertically parallel. Reflector 9 is placed at the preset angle in the opposite direction. The center distance between the reflectors on the same side is a fixed value. The electric turntable assembly (2) consists of a rotating shaft, a turntable, and a motor. The turntable is located at the laser exit position. Adjusting the speed of the motor can adjust the speed of the turntable around the rotating shaft. The base assembly (3) consists of a welding base, a platform 1 for fixing the mirror frame, and a platform 2. Platform 1 and platform 2 are located on both sides of the welding base. Reflectors 1, 3, 5, 7, and 9 are located on platform 1. Reflectors 2, 4, 6, and 8 and the electric turntable assembly (2) are located on platform 2. The housing assembly (4) consists of an aluminum profile frame and housing plates around the aluminum profile frame. The laser entrance is located on one of the housing plates.

2. The apparatus as claimed in claim 1, characterized in that, All nine mirrors are coated with a 1550nm high-reflectivity film.

3. The apparatus as described in claim 1, characterized in that, The center-to-center distance between reflector one and reflector two is 5m. Reflector one is placed at an angle of 1.5°, and reflector nine is placed at an angle of 1.5° in the opposite direction. The center-to-center distance between reflectors on the same side is 0.524m.

4. The apparatus as claimed in claim 1, characterized in that, The welding base is made of H-beams and steel plates welded together.

5. The apparatus as described in claim 4, characterized in that, The welding base is made of H-beam HM200x150 welded to a steel plate.

6. The apparatus as claimed in claim 1, characterized in that, The cover panels around the aluminum profile frame are all removable.

7. The apparatus as claimed in claim 1, characterized in that, The device is capable of receiving laser beams emitted by a laser wind-measuring radar.

8. The apparatus as claimed in claim 1, characterized in that, This device is used in radar testing.

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