WO2023088084A1

WO2023088084A1 - Wind speed measurement system and method

Info

Publication number: WO2023088084A1
Application number: PCT/CN2022/128953
Authority: WO
Inventors: 徐宇红
Original assignee: 深圳市欧赛特电子有限公司
Priority date: 2021-11-19
Filing date: 2022-11-01
Publication date: 2023-05-25
Also published as: CN114113676A

Abstract

A wind speed measurement system, comprising an ultrasonic probe assembly and a controller (120). The ultrasonic probe assembly is used for transmitting and receiving an ultrasonic wave, the ultrasonic probe assembly comprises a plurality of ultrasonic probes (110), two opposite ultrasonic probes (110) are set as a group, and connecting lines between two groups of ultrasonic probes (110) are perpendicular to each other. The controller (120) is electrically connected to the ultrasonic probe assembly, the controller (120) is used for controlling the ultrasonic probe assembly to switch between a first measurement mode and a second measurement mode, the first measurement mode is used for the measurement of a time difference between the two groups of ultrasonic probes (110), and the second measurement mode is used for the measurement of a time difference between one ultrasonic probe (110) and two ultrasonic probes (110) located at adjacent edges of a right angle. Also provided is a wind speed measurement method.

Description

Wind speed measurement system and method

References to related applications

This disclosure claims the priority of the invention patent with the application number 202111398927.1 and the invention name "wind speed measurement system and method" submitted to the State Intellectual Property Office of the People's Republic of China on November 19, 2021, and its entire content is incorporated by reference incorporated into this disclosure.

field

The present disclosure generally relates to the technical field of meteorological monitoring, and more particularly to wind speed measurement systems and methods.

background

Wind speed is an essential item in meteorological environment monitoring. At present, ultrasonic anemometers are widely used to measure wind speed.

The working principle of the ultrasonic anemometer is to use the ultrasonic time difference method to measure the wind speed. The ultrasonic anemometer uses four ultrasonic probes to send and receive ultrasonic waves, so as to realize the measurement of wind speed.

Under normal circumstances, the ultrasonic anemometer measures the time difference between the two probes to determine the wind speed in the direction of the line connecting the two probes. Four probes are set, and the connection lines between the four probes are perpendicular to each other, so that the measurement of wind speed in four directions can be realized.

overview

In a first aspect, the present disclosure relates to an anemometer system comprising:

Ultrasonic probe assembly, the ultrasonic probe assembly is used to transmit and receive ultrasonic waves, the ultrasonic probe assembly includes a plurality of ultrasonic probes, the ultrasonic probes that are set in pairs are one group, and the ultrasonic probes between the two groups are the lines are perpendicular to each other; and

a controller, the controller is electrically connected to the ultrasonic probe assembly, the controller is used to control the ultrasonic probe assembly to switch between the first measurement mode and the second measurement mode, the first measurement The second measurement mode is used to measure the time difference between one ultrasonic probe and two ultrasonic probes located at right-angled adjacent sides.

In some embodiments, when the wind speed measured by the first measurement mode is greater than or equal to a preset threshold, the controller controls the measurement mode of the ultrasonic probe assembly to switch to the second measurement mode.

In some embodiments, the range of the preset threshold is greater than or equal to 36 m/s.

In some embodiments, the frequency emitted by the ultrasound probe is 40KHz.

In certain embodiments, the number of ultrasound probes is four.

In some embodiments, the wind speed measurement system further includes an upper cover and a base, and the upper cover and the base are closed to form a hollow cavity for accommodating the ultrasonic probe assembly.

In some embodiments, the controller is disposed above the ultrasonic probe assembly, and the controller is housed in the hollow cavity.

In some embodiments, the wind speed measurement system further includes a power supply component disposed under the ultrasonic probe component for providing electrical energy to the ultrasonic probe component.

In some embodiments, the controller has a communication module, and the communication module is used for wirelessly communicating with external equipment, and transmitting wind speed measurement data to the external equipment.

In a second aspect, the present disclosure relates to a wind speed measurement method, which is applied to the wind speed measurement system of the present disclosure, and the method includes the following steps:

Obtain the current wind speed in real time; and

When the current wind speed is greater than or equal to the preset threshold, control the first measurement mode to switch to the second measurement mode; the first measurement mode is used to measure the time difference between two groups of ultrasonic probes, and the second measurement mode is used to It is used to measure the time difference between one ultrasonic probe and two ultrasonic probes located on right-angled adjacent sides.

The wind speed measurement system of the present disclosure includes an ultrasonic probe assembly and a controller. The ultrasonic probe assembly is used to transmit and receive ultrasonic waves. The ultrasonic probe assembly includes a plurality of ultrasonic probes. The ultrasonic probes that are opposite to each other are set as a group. The lines between the two groups of ultrasonic probes are perpendicular to each other; the controller and the ultrasonic probe assembly are electrically Sexual connection, the controller is used to control the ultrasonic probe assembly to switch between the first measurement mode and the second measurement mode, the first measurement mode is used to measure the time difference between two groups of ultrasonic probes, and the second measurement mode is used to use It is used to measure the time difference between one ultrasonic probe and two ultrasonic probes located on right-angled adjacent sides. In this way, the ultrasonic probe assembly is controlled by the controller, so that different measurement modes are adopted according to the magnitude of the wind speed. It can not only avoid the limitation of the wind speed measurement range when in the first measurement mode, but also can replace and use the second measurement mode in the case of high wind speed, so as to improve the ability of the ultrasonic probe assembly to resist failure.

Brief description of the drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description serve to explain the principles of the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings without paying creative labor.

FIG. 1 is a schematic structural diagram of an wind speed measurement system provided by an embodiment of the present disclosure;

FIG. 2 is an exploded schematic diagram of an wind speed measurement system provided by an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an ultrasonic probe provided by an embodiment of the present disclosure; and

Fig. 4 is a schematic flowchart of a wind speed measurement method provided by an embodiment of the present disclosure.

Reference signs:

100. Wind speed measuring system; 110. Ultrasonic probe; 120. Controller; 130. Upper cover; 140. Base; 150. Power supply component.

detail

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments It is a part of embodiments of the present disclosure, but not all embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present disclosure.

Referring to FIG. 1 to FIG. 3 , an anemometer system 100 provided by an embodiment of the present disclosure includes: an ultrasonic probe assembly and a controller 120 . The ultrasonic probe assembly is used to transmit and receive ultrasonic waves. The ultrasonic probe assembly includes a plurality of ultrasonic probes 110 . The ultrasonic probes 110 facing each other form a group, and the connecting lines between the two groups of ultrasonic probes 110 are perpendicular to each other. The controller 120 is electrically connected to the ultrasonic probe assembly, the controller 120 is used to control the ultrasonic probe assembly to switch between the first measurement mode and the second measurement mode, and the first measurement mode is used to measure the difference between the two sets of ultrasonic probes 110 The second measurement mode is used to measure the time difference between one ultrasonic probe 110 and two ultrasonic probes 110 located at right-angled adjacent sides.

In some embodiments, when the wind speed is less than a preset threshold, the ultrasonic probe assembly uses the first measurement mode to perform measurement. When the wind speed is greater than or equal to the preset threshold, the controller 120 controls the ultrasonic probe assembly to switch from the first measurement mode to the second measurement mode, and the second measurement mode can measure a larger wind speed value. In this way, on the one hand, it can avoid that the measurement range of the wind speed in the first measurement mode is not enough to meet the measurement of high wind speed; on the other hand, setting the two measurement modes can also improve the ability of the ultrasonic probe assembly to resist failure. In the measurement mode, four ultrasonic probes 110 need to be used for measurement, and in the second measurement mode, three ultrasonic probes 110 can be used for measurement.

In some embodiments, when the wind speed measured in the first measurement mode is greater than or equal to a preset threshold, the controller 120 controls the ultrasonic probe assembly to switch to the second measurement mode. When the wind speed measurement system 100 measures the wind speed, it first uses the first measurement mode to measure the wind speed, and when the wind speed measured by the first measurement mode reaches a preset threshold, the controller 120 adjusts the measurement mode of the ultrasonic probe assembly to the second measurement mode . In this way, the first measurement mode can measure the wind speed less than the preset threshold, and the second measurement mode can measure the wind speed greater than the preset threshold, thereby improving the range selection of wind speed measurement.

In some embodiments, the range of the preset threshold is greater than or equal to 36 m/s. It is also possible to set a value range of the preset threshold to be less than or equal to 40m/s. When the preset threshold is less than or equal to 36m/s, the first measurement mode is used to measure the wind speed. At this time, the wind speed is small and the measurement result is accurate. When the wind speed measured by the first measurement mode is greater than 36m/s, the second measurement mode is used for measurement, and when the wind speed measured by the second measurement mode is less than 30m/s, the controller 120 controls the ultrasonic probe assembly to switch to the first measurement mode . Thereby expanding the range of wind speed measurement and improving the accuracy of wind speed measurement. Of course, the preset threshold can also be set to 40m/s, so that when the maximum value of the first measurement mode is reached, the second measurement mode is switched.

Referring to FIG. 3 , in the embodiment of the present disclosure, the frequency emitted by the ultrasonic probe 110 is 40KHz. In the first measurement mode, the number of ultrasonic probes 110 is four. In the second measurement mode, the number of ultrasonic probes 110 may be three. It is sufficient that the lines connecting the three ultrasonic probes 110 form an equilateral right triangle.

In some embodiments, in the first measurement mode, four ultrasonic probes 110 are installed at A, B, C and D, respectively. The wind speed time difference in x and y directions is determined by measuring the time difference of ultrasonic emission and reception between AB and CD.

The formula for calculating the time difference between A and B is:

delta_T=L _AB /(c_wind speed+V)–L _AB /(c_wind speed–V);

It can be drawn from this: V=delta_T*C^2/2L.

Among them, L _AB is the distance between AB, delta_T is the time difference, c_wind speed is the parameter of wind speed, C is the speed of sound in the air, V is the wind speed.

Due to the limitation of the characteristics of the ultrasonic probe 110, only one phase time difference can be processed, that is, 25us, so the upper limit of the measured wind speed is generally 40m/s. The measurement of speed is inversely proportional to the distance, that is, the larger L is, the smaller the speed that can be measured.

In addition to the traditional through-beam method, the wind speed can be measured by measuring the time difference of ultrasonic waves from C to A, A to C, and C to B, and B to C. Thus the distance of L is reduced to

The wind speed also increased from the original maximum measurement speed of 40m/s to 56m/s.

SQR(2)=1.414, SQR represents the root sign, since the adjacent side of the isosceles right triangle is selected for calculation, the original distance of L is reduced to

If the maximum wind speed that can be measured in the first measurement mode is 30m/s, then the wind speed that can be measured in the second measurement mode is 42m/s. If the maximum wind speed that can be measured in the first measurement mode is 40m/s, then the wind speed that can be measured in the second measurement mode is 56m/s.

Since the 40KHz ultrasonic probe 110 is used, the requirements on the ultrasonic probe 110 can be reduced. This design can ensure the accuracy of low wind speed measurement. Under the condition of high wind speed over 40m/s, the ultrasonic probe 110 located on the right-angled adjacent side is used for measurement to increase the measurement range.

In some embodiments, the wind speed measurement system 100 further includes an upper cover 130 and a base 140, and the upper cover 130 and the base 140 are closed to form a hollow cavity for accommodating the ultrasonic probe assembly. The upper cover 130 and the base 140 are detachably connected, and specifically may be snap-fit or threaded. The base 140 has a plurality of through holes for accommodating the ultrasonic probe 110 and allowing the ultrasonic probe 110 to emit or receive ultrasonic waves.

In some embodiments, the controller 120 is disposed above the ultrasound probe assembly, and the controller 120 is housed in the hollow cavity. After the upper cover 130 and the base 140 are closed, rainwater can be prevented from infiltrating into the controller 120, avoiding a short circuit of the controller 120, and prolonging the life of the wind speed measuring device.

In some embodiments, the wind speed measurement system 100 further includes a power supply assembly 150, which is disposed under the ultrasonic probe assembly and used for providing electrical energy to the ultrasonic probe assembly. The power component 150 includes a supercapacitor and a battery, and the battery can be a disposable battery or a rechargeable battery.

In some embodiments, the controller 120 has a communication module configured to communicate wirelessly with external devices and transmit wind speed measurement data to the external devices. In this way, it is convenient for the user to acquire the current wind speed in real time.

Referring to FIG. 4 , the wind speed measurement method provided by the embodiment of the present disclosure is applied to the wind speed measurement system 100 described above, and the method includes the following steps:

S100, to obtain the current wind speed in real time; and

S200, when the current wind speed is greater than or equal to the preset threshold, control the first measurement mode to switch to the second measurement mode; the first measurement mode is used to measure the time difference between two sets of ultrasonic probes 110, and the second measurement mode is used to The time difference between one ultrasonic probe 110 and two ultrasonic probes 110 located at right-angled adjacent sides is measured.

In some embodiments, the wind speed measurement method provided by the embodiments of the present disclosure is used to obtain the current wind speed in real time to determine whether the current wind speed is greater than or equal to the preset threshold, and if the current wind speed is less than the preset threshold, then control the operation of the first measurement mode . After the first measurement mode is started, the current wind speed is continuously obtained in real time, and when the current wind speed is greater than or equal to a preset threshold, the second measurement mode is controlled to run. Therefore, different measurement modes are adopted according to the size of the wind speed. It can not only avoid inaccurate measurement of the wind speed in the first measurement mode, but also improve the ability of the ultrasonic probe assembly to resist failure.

It is worth noting that the wind speed does not change from low wind speed to high wind speed immediately, and the wind speed has a process from small to large, so when starting to measure wind speed, use the first measurement mode to perform pre-check first, and then adjust the measurement according to the actual wind speed model. Improve the accuracy of wind speed measurement.

It should be noted that in this article, relative terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these No such actual relationship or order exists between entities or operations. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The above descriptions are only specific embodiments of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

Anemometer system comprising:

Ultrasonic probe assembly, the ultrasonic probe assembly is used to transmit and receive ultrasonic waves, the ultrasonic probe assembly includes a plurality of ultrasonic probes, the ultrasonic probes that are set in pairs are one group, and the connection between the two groups of ultrasonic probes the lines are perpendicular to each other; and

a controller, the controller is electrically connected to the ultrasonic probe assembly, the controller is used to control the ultrasonic probe assembly to switch between the first measurement mode and the second measurement mode, the first measurement The second measurement mode is used to measure the time difference between one ultrasonic probe and two ultrasonic probes located at right-angled adjacent sides.
The wind speed measurement system according to claim 1, wherein, when the wind speed measured by the first measurement mode is greater than or equal to a preset threshold, the controller controls the measurement mode of the ultrasonic probe assembly to switch to the second Two measurement modes.
The wind speed measurement system according to claim 2, wherein the range of the preset threshold is greater than or equal to 36m/s.
The wind speed measurement system according to any one of claims 1 to 3, wherein the frequency emitted by the ultrasonic probe is 40KHz.
The wind speed measurement system according to any one of claims 1 to 4, wherein the number of the ultrasonic probes is four.
The wind speed measuring system according to any one of claims 1 to 5, wherein the wind speed measuring system further comprises an upper cover and a base, and the upper cover and the base are closed together to form an accommodating ultrasonic probe The hollow interior of the component.
The wind speed measuring system according to claim 6, wherein the controller is arranged above the ultrasonic probe assembly, and the controller is housed in the hollow cavity.
The wind speed measurement system according to any one of claims 1 to 7, wherein, the wind speed measurement system further comprises a power supply assembly, the power supply assembly is arranged below the ultrasonic probe assembly to be configured as the The ultrasonic probe assembly provides electrical power.
The wind speed measurement system according to claim 8, wherein the controller has a communication module configured to wirelessly communicate with external devices and transmit wind speed measurement data to the external devices.
The wind speed measurement method is applied to the wind speed measurement system according to any one of claims 1 to 9, comprising the following steps:

Obtain the current wind speed in real time; and

When the current wind speed is greater than or equal to the preset threshold, control the first measurement mode to switch to the second measurement mode; the first measurement mode is used to measure the time difference between two groups of ultrasonic probes, and the second measurement mode is used to It is used to measure the time difference between one ultrasonic probe and two ultrasonic probes located on right-angled adjacent sides.