Device for measuring wind speed of LDV

Abstract

The utility model discloses a device for measuring the wind speed of an LDV, which comprises a measuring frame with a rectangular cross section, the front side of the measuring frame is provided with a measuring hole, and the front side panel of the measuring frame is divided into two sections by the measuring hole; the measuring hole penetrates through the rear side of the measuring frame and divides a rear side panel of the measuring frame into two sections; baffles are fixed to the positions, at the measuring holes, of a front side panel and a rear side panel of the measuring frame, a supporting plate is fixed to the bottom of the measuring frame, a glass plate is supported on the supporting plate, the two ends of the glass plate are clamped between the baffles and the measuring frame respectively, and the inner side of the glass plate is flush with the inner side of the measuring frame. Compared with the prior art, through the cooperation of the baffle plate, the supporting plate and the measuring frame, the glass plate can be fixed at the hole opening of the measuring hole in an insertion manner, and the installation manner of the glass plate is simple; and the inner side of the glass plate is flush with the inner side of the measuring frame, so that the smoothness of the inner cavity of the measuring frame can be effectively ensured, and the measuring precision is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of wind speed measurement, in particular to a device for measuring wind speed using an LDV. Background Art

[0002] The Laser Doppler Velocimeter (LDV) is essentially an instrument that measures the velocity of a fluid by detecting the scattered light of tiny particles in the fluid that move at the same speed as the fluid. Currently, the use of LDV for wind velocity measurement is a hot topic in research and application. Tracer particle velocimetry technology is used to characterize wind speed, that is, the movement of tracer particles in the wind tunnel measurement section is used to characterize the standard wind speed in the calibration process. When LDV is used for wind velocity measurement, a transparent window is required at the measurement position, that is, the laser beam of the LDV can penetrate the wall of the device and intersect at the measurement point. When the LDV is used as a standard to measure the air volume of an air volume device, the cross-sectional flow velocity of the measuring section needs to be accurately measured. Therefore, the installation of the transparent window must not affect the cross-sectional flow velocity of the measuring section. Utility Model Content

[0003] The utility model provides a device for measuring wind speed using an LDV, which provides a transparent window installation structure that does not affect the cross-sectional flow velocity of a measuring section.

[0004] The utility model provides a device for measuring wind speed using an LDV, which comprises a measuring frame with a rectangular cross section, wherein a measuring hole is provided on the front side of the measuring frame, and the measuring hole divides the front panel of the measuring frame into two sections; the measuring hole passes through the rear side of the measuring frame, and the measuring hole divides the rear panel of the measuring frame into two sections; baffles are fixed to the front panel and the rear panel of the measuring frame at the measuring holes, a supporting plate is fixed to the bottom of the measuring frame, a glass plate is supported on the supporting plate, two ends of the glass plate are respectively inserted between the baffle and the measuring frame, and the inner side of the glass plate is flush with the inner side of the measuring frame.

[0005] Preferably, the height of the baffle is the same as that of the measuring frame, and the upper end and the lower end of the baffle are respectively flush with the upper end and the lower end of the measuring frame.

[0006] Preferably, the support plate is fixed to the bottom of the baffle, and the support plate is flush with the outer side of the baffle.

[0007] Preferably, the gap between the glass plate and the baffle and the gap between the glass plate and the supporting plate are filled with sealant.

[0008] Preferably, the upper end of the glass plate extends out from the upper end surface of the measuring frame.

[0009] Preferably, connecting flanges are fixed to both ends of the measuring frame.

[0010] Preferably, the measurement frame further includes a top side panel and a bottom side panel, and the front side panel and the rear side panel are fixed between the top side panel and the bottom side panel by welding.

[0011] Preferably, the baffle is fixed to the measuring frame by welding, and the supporting plate is fixed to the measuring frame and the baffle by welding respectively.

[0012] Preferably, the sealant is glass glue or structural glue.

[0013] Preferably, the right end of the measuring frame is connected to the diffusion section and the moving section in sequence, and the left end of the measuring frame is connected to the contraction section, the rectification section, the transfer section and the fan access section in sequence. The outline of the diffusion section gradually increases along the flow direction of the wind, the outline of the transfer section gradually increases along the flow direction of the wind, and the outline of the contraction section gradually decreases along the flow direction of the wind.

[0014] Compared with the existing technology, the present invention uses the coordination of a baffle, a support plate, and a measuring frame to enable the glass plate to be fixed to the opening of the measuring hole by insertion, and the installation method of the glass plate is simple; and the inner side of the glass plate is flush with the inner side of the measuring frame, which can effectively ensure that the inner cavity of the measuring frame is smooth, without protruding parts, and will not interfere with the flow field, thereby ensuring measurement accuracy. Secondly, it ensures that all levels of the measuring frame from the bottom to the top surface can be measured without any obstruction, and can achieve full measurement of the cross section without dead angles, especially the flow velocity gradient changes and effects near the boundary layer. Thirdly, it ensures the vertical installation of the glass plate, ensuring that the laser beam will not be refracted due to the tilt of the glass plate during LDV measurement, and subsequent complex corrections. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 This is the main view of the measurement frame of the utility model;

[0018] Figure 3 for Figure 2 A top view of

[0019] Figure 4 for Figure 2 Bottom view of

[0020] Figure 5 for Figure 3 A magnified schematic diagram of the structure at center A.

[0021] Reference numerals:

[0022] 1. Measuring frame, 2. Baffle, 3. Support plate, 4. Glass plate, 5. Connecting flange, 6. Diffusion section, 7. Travel section, 8. Contraction section, 9. Rectification section, 10. Transfer section, 11. Fan access section, 011. Top side panel, 012. Bottom side panel, 013. Front side panel, 014. Rear side panel. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. 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.

[0024] Refer to the attached Figure 2 and attached Figure 4 The present embodiment provides a device for measuring wind speed using an LDV, which includes a measuring frame 1 with a rectangular cross-section. A measuring hole is provided on the front side of the measuring frame 1, which divides the front panel 013 of the measuring frame 1 into two sections; the measuring hole passes through the rear side of the measuring frame 1, which divides the rear panel 014 of the measuring frame 1 into two sections; a baffle 2 is fixed to the front panel 013 and the rear panel 014 of the measuring frame 1 at the measuring hole, and the baffle 2 extends to the measuring hole to form a slot with the measuring frame 1; a support plate 3 is fixed to the bottom of the measuring frame 1, and a glass plate 4 is supported on the support plate 3. The two ends of the glass plate 4 are respectively inserted between the baffle 2 and the measuring frame 1, that is, inserted into the slot, and the inner side of the glass plate 4 is flush with the inner side of the measuring frame 1, so that the laser beam emitted by the LDV can pass through the glass plate 4. The present invention uses the coordination of the baffle 2, the support plate 3, and the measuring frame 1 to enable the glass plate 4 to be fixed to the opening of the measuring hole by insertion. The installation method of the glass plate 4 is simple. The inner side of the glass plate 4 is flush with the inner side of the measuring frame 1, which can effectively ensure that the inner cavity of the measuring frame 1 is smooth, without any protruding parts, and will not interfere with the flow field, thereby ensuring measurement accuracy. Secondly, it ensures that all levels of the measuring frame 1 from the bottom to the top surface can be measured without any obstruction, and can achieve full measurement of the cross section without blind spots, especially the flow velocity gradient changes and effects near the boundary layer. Thirdly, it ensures the vertical installation of the glass plate 4, ensuring that the laser beam will not be refracted due to the tilt of the glass plate 4 during LDV measurement, and subsequent complex corrections will not be required.

[0025] As another embodiment of the present invention: the height of the baffle 2 is the same as the height of the measuring frame 1, and the upper and lower ends of the baffle 2 are respectively flush with the upper and lower ends of the measuring frame 1, that is, the height of the baffle 2 is the same as the height of the front panel 013, and the baffle 2 is aligned with both ends of the front panel 013.

[0026] As another embodiment of the present invention: Figure 3-5 The supporting plate 3 is fixed to the bottom of the baffle 2, and the supporting plate 3 is flush with the outer sides of the baffle 2. Specifically, the supporting plate 3 and the baffle 2 are fixed by welding.

[0027] As another embodiment of the present invention, the gaps between the glass plate 4 and the baffle 2, as well as the gaps between the glass plate 4 and the support plate 3, are filled with sealant. To facilitate installation, the thickness of the glass plate 4 is smaller than the distance between the baffle 2 and the measuring frame 1. When the glass plate 4 is inserted into the slot, gaps will form, which can cause gas leakage. Therefore, sealant is applied to these gaps to seal them.

[0028] As another embodiment of the present invention, the upper end of the glass plate 4 extends out of the upper end surface of the measuring frame 1 , and sealant can be applied between the measuring frame 1 and the extended glass plate 4 for sealing as needed.

[0029] As another embodiment of the present invention: connecting flanges 5 are fixed to both ends of the measuring frame 1, and the connecting flanges 5 are provided with multiple mounting holes for connecting with the connecting flanges 5 of other equipment. The connection between the two connecting flanges 5 is sealed by a rubber sealing gasket.

[0030] As another embodiment of the present invention: the measuring frame 1 further includes a top panel 011 and a bottom panel 012 , and the front panel 013 and the rear panel 014 are fixed between the top panel 011 and the bottom panel 012 by welding.

[0031] As another embodiment of the present invention: the baffle 2 is fixed to the measuring frame 1 by welding, the supporting plate 3 is fixed to the measuring frame 1 by welding, and the measuring frame 1, the baffle 2 and the supporting plate 3 are all made of stainless steel.

[0032] As another implementation manner of the present invention: the sealant is glass glue or structural glue.

[0033] As another embodiment of the present invention: Figure 1The right end of the measurement frame 1 is the outlet direction of the airflow, and the left end is the inlet direction of the airflow. The right end of the measurement frame 1 is sequentially connected to the diffuser section 6 and the forward section 7. The left end of the measurement frame 1 is sequentially connected to the contraction section 8, the rectifying section 9, the transition section 10, and the fan access section 11. The profile of the diffuser section 6 gradually increases along the wind flow direction, the profile of the transition section 10 gradually increases along the wind flow direction, and the profile of the contraction section 8 gradually decreases along the wind flow direction. This structural design facilitates the generation of a stable and uniform air flow.

[0034] 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 various embodiments of the present invention.

Claims

1. A device for measuring wind speed using LDV, characterized in that: It comprises a measuring frame with a rectangular cross-section, wherein a measuring hole is provided on the front side of the measuring frame, and the measuring hole divides the front panel of the measuring frame into two sections; the measuring hole passes through the rear side of the measuring frame, and the measuring hole divides the rear panel of the measuring frame into two sections; baffles are fixed to the front panel and the rear panel of the measuring frame at the measuring holes, and a support plate is fixed to the bottom of the measuring frame, and a glass plate is supported on the support plate, and the two ends of the glass plate are respectively inserted between the baffle and the measuring frame, and the inner side of the glass plate is flush with the inner side of the measuring frame.

2. The device for measuring wind speed using LDV according to claim 1, characterized in that: The height of the baffle is the same as that of the measuring frame, and the upper end and the lower end of the baffle are respectively flush with the upper end and the lower end of the measuring frame.

3. The device for measuring wind speed using LDV according to claim 2, characterized in that: The supporting plate is fixed to the bottom of the baffle, and the supporting plate is flush with the outer side of the baffle.

4. The device for measuring wind speed using LDV according to claim 3, characterized in that: The gaps between the glass plate and the baffle and the gaps between the glass plate and the supporting plate are filled with sealant.

5. The device for measuring wind speed using LDV according to claim 4, characterized in that: The upper end of the glass plate extends out of the upper end surface of the measuring frame.

6. The device for measuring wind speed using LDV according to claim 1, characterized in that: Connecting flanges are respectively fixed on both ends of the measuring frame.

7. The device for measuring wind speed using LDV according to claim 1, characterized in that: The measuring frame further comprises a top side panel and a bottom side panel, and the front side panel and the rear side panel are both fixed between the top side panel and the bottom side panel by welding.

8. The device for measuring wind speed using LDV according to claim 1, characterized in that: The baffle is fixed to the measuring frame by welding, and the supporting plate is fixed to the measuring frame and the baffle by welding respectively.

9. The device for measuring wind speed using LDV according to claim 4, characterized in that: The sealant is glass glue or structural glue.

10. The device for measuring wind speed using LDV according to claim 1, characterized in that: The right end of the measuring frame is connected to the diffusion section and the moving section in sequence, and the left end of the measuring frame is connected to the contraction section, the rectification section, the transfer section and the fan access section in sequence. The outline of the diffusion section gradually increases along the flow direction of the wind, the outline of the transfer section gradually increases along the flow direction of the wind, and the outline of the contraction section gradually decreases along the flow direction of the wind.

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