Reflection Ultrasonic Anemometer and Wind Velocity Detection Method

A wind speed detection and reflective technology, applied in speed/acceleration/shock measurement, fluid speed measurement, speed/acceleration/electric shock meter detailed information, etc., can solve excessive reflection of high wind speed signal, small echo signal amplitude, and signal attenuation and other problems, to achieve the effect of increasing the wind speed measurement range, large wind speed measurement range, and reducing wind speed error

Active Publication Date: 2021-12-03
杭州朋谱科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the wind tunnel test, it was found that after calibration, the calibrated direction measurement was accurate, but when the anemometer was turned, it was found that the wind speed measurement at other angles had a large error
[0008] 2. Attenuation and loss of ultrasonic signals in strong winds;
[0009] Reflective ultrasonic time-of-flight anemometer, the conventional reflective surface is a flat design, when the wind speed is high, there is a problem that the signal is blown away, resulting in the received echo signal amplitude is very small and difficult to detect, or can not be received to the echo signal
Some manufacturers design the reflective surface as a concave structure, most of which are spherical surfaces with a certain curvature, which can reduce the signal weakening and loss in strong winds to a certain extent. However, it is difficult for a concave surface with a fixed curvature to meet the reflection requirements of all wind speeds, such as intermediate wind speeds. When the reflection requirements are met, the high wind speed signal tends to reflect excessively and cannot enter the ultrasonic transducer, and the concave surface with a certain curvature will also introduce the nonlinear problem between the wind speed measured by the anemometer and the standard wind speed
[0010] To sum up, when the reflecting surface is flat, the problem of signal attenuation and loss is serious when the wind speed is high, but there is no nonlinear problem of wind speed measurement
When the reflective surface is a spherical concave surface with a fixed curvature, although the attenuation and loss of high wind speed signals can be reduced to a certain extent, it cannot meet the reflection requirements of all wind speed ranges, and it will also introduce nonlinearity between the measured wind speed and the standard wind speed question

Method used

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  • Reflection Ultrasonic Anemometer and Wind Velocity Detection Method
  • Reflection Ultrasonic Anemometer and Wind Velocity Detection Method
  • Reflection Ultrasonic Anemometer and Wind Velocity Detection Method

Examples

Experimental program
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Effect test

Embodiment 1

[0034] figure 1 The structure schematic diagram of the reflective ultrasonic anemometer of the embodiment of the present invention is given, as figure 1 As shown, the reflective ultrasonic anemometer includes:

[0035] A base 21, a reflector 11 and an analysis unit, the reflector 11 is located on the upper side of the base 21 and has an upwardly convex concave reflective surface 31;

[0036] Transducers 41, four transducers 41 are arranged on the base 21;

[0037] Support columns 51, four support columns 51 are arranged on the base 21, and support the reflector 11; the support columns 51 are arranged between adjacent transducers 41;

[0038] Such as figure 2 As shown, the supporting columns 51 and the transducers 41 are alternately distributed, and on the base 21, the central angles corresponding to the adjacent supporting columns 51 and the transducers 41 are both 45°;

[0039] A calculation unit, the calculation unit is used to obtain the corrected wind speed according ...

Embodiment 2

[0045] An application example of the reflective ultrasonic anemometer and the wind speed detection method according to Embodiment 1 of the present invention.

[0046] In this application example, as Figure 1-2 As shown, in the reflective ultrasonic anemometer, four transducers 41 and four supporting columns 51 are arranged on the base 21, and supporting columns 51 are arranged between adjacent transducers 41, and the supporting columns 51 and the transducers The transducers 41 are arranged alternately, and the central angles corresponding to the adjacent supporting columns 51 and the transducers 41 are both 45°;

[0047] Such as image 3 As shown, the concave reflective surface 31 includes three circular reflective surfaces, the innermost circular reflective surface 32 is a plane, the radius R1=2.08mm, and the angle between the plane and the vertical direction is 90°;

[0048] The inner radius R2 of the outermost annular reflective surface 34 = 6.24mm, the outer radius R3 =...

Embodiment 3

[0061] According to the application example of the reflective ultrasonic anemometer and wind speed detection method of embodiment 1 of the present invention, the difference from embodiment 2 is:

[0062] The radius of the inner ring of the annular reflective surface 33 on the middle side is 2.08 mm, and the radius of the outer ring is 6.24 mm. The intersection line between the annular reflective surface 33 on the middle side and the vertical surface (including the center 35 of the concave reflective surface 31 ) is a straight line segment. The greater the distance from the center 35 of the concave reflection surface 31, the angle between the tangent line in the vertical plane and the vertical direction of each point (i.e. the reflection point) of the straight line segment remains unchanged, which is 88°;

[0063] The inner radius of the outermost annular reflective surface 34 is 6.24mm, the outer radius is 12.48mm, and the intersection line between the outermost annular reflect...

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Abstract

The invention provides a reflective ultrasonic anemometer and a wind speed detection method. The reflective ultrasonic anemometer includes a base, a transducer, a support column, a reflector and an analysis unit; the transducer is arranged on the base, and the The reflector is located on the upper side of the base and has a concave reflective surface; the support columns are arranged between the base and the reflector, and the support columns are arranged between adjacent transducers; four transducers The sensor and four supporting columns are arranged on the base, and the supporting columns and the transducers are arranged alternately. On the base, the central angles corresponding to the adjacent supporting columns and the transducers are all 45°; the calculation unit is used for The corrected wind speed is obtained according to the calculated wind speed V output by the analysis unit, a, b, and c are all constants, and d is a parameter related to the measured wind direction angle. The invention has the advantages of accurate wind speed measurement, large wind speed measurement range and the like.

Description

technical field [0001] The invention relates to wind speed detection, in particular to a reflective ultrasonic anemometer and a wind speed detection method. Background technique [0002] The measurement of wind speed and direction is of great value in many industries such as meteorological monitoring, wind power generation and agriculture. Among them, in the field of meteorological monitoring, especially marine meteorological monitoring, the requirements for wind speed measurement range are relatively high, and the anemometer must be able to measure (40~60) m / s or even higher wind speed; in the field of wind power generation, the measurement of wind speed and direction Accuracy and measurement range directly determine the working state of the wind turbine (start small fan or large fan or stop), and affect the power generation efficiency of the wind generator (the pitch system adjusts the windward angle of the blade according to the wind speed, and the yaw system adjusts the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/24G01P1/00
CPCG01P5/24G01P1/00
Inventor 叶华俊刘韬
Owner 杭州朋谱科技有限公司
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