CN103777035A - Draught-fan air-speed measurement method, device and system - Google Patents
Draught-fan air-speed measurement method, device and system Download PDFInfo
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- CN103777035A CN103777035A CN201210401055.4A CN201210401055A CN103777035A CN 103777035 A CN103777035 A CN 103777035A CN 201210401055 A CN201210401055 A CN 201210401055A CN 103777035 A CN103777035 A CN 103777035A
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Abstract
The invention provides a draught-fan air-speed measurement method, device and system, wherein the method part is: according to the relative positions of a wind turbine generator and a measurement point, calculating an emission angle of first measurement waves; according to the emission angle of the first measurement waves, emitting the first measurement waves to the measurement point so as to enable the measurement point to use air flows at a position of the measurement point and the second measurement waves to reflect second measurement waves; receiving the second measurement waves; and according to the first measurement waves and the second measurement waves, acquiring the speed of the air flows. The method, device and system solve a technical problem of smaller air-speed measurement scope of the wind turbine generator in the prior art so that work efficiency of a variable-pitch system can be improved.
Description
Technical field
The present invention relates to wind generating technology, relate in particular to a kind of blower fan wind measurement method, device and system.
Background technology
Wind-powered electricity generation unit comprises impeller, cabin and tower cylinder, and wherein impeller comprises blade and wheel hub.Because the volume of the blade of wind-powered electricity generation unit is larger, under the effect of wind shear effect, can there are the imbalance vibrations of serious blade, and then increase the load of wind-powered electricity generation unit, shorten the serviceable life of wind-powered electricity generation unit.Prior art, according to the wind speed in blade front, is formulated independent pitch and apart from strategy, the angle of blade is adjusted, and then reduces the load of wind-powered electricity generation unit.
But normal employing of prior art is placed on laser anemometer on the ground in wind-powered electricity generation unit front, and Emission Lasers light beam straight up, measures the wind speed in blade front.Because the wind speed recording is the wind speed of a certain point of fixity in blade front, measuring wind speed scope is less.
Summary of the invention
The invention provides a kind of blower fan wind measurement method, device and system, for expanding measuring wind speed scope.
An aspect of of the present present invention provides a kind of blower fan wind measurement method, comprising:
According to the relative position of measurement point, calculate the first emission angle of measuring ripple;
According to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second;
Receive described second and measure ripple;
Measure ripple and described second according to described first and measure ripple, obtain the speed of described air-flow.
Another aspect of the present invention provides a kind of blower fan wind speed measuring device, comprising:
Computing module, the relative position for basis with measurement point, the emission angle of ripple is measured in calculating first;
Transmitter module, for according to the emission angle of described the first measurement ripple, launches described first to described measurement point and measures ripple, and to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second;
Receiver module, measures ripple for receiving described second;
Processing module, measures ripple for measuring ripple and described second according to described first, obtains the speed of described air-flow.
Another aspect of the present invention provides a kind of blower fan wind velocity measurement system, comprises wind speed measuring device as above and wind-powered electricity generation unit;
Described wind speed measuring device is connected with the wheel hub of described wind-powered electricity generation unit, makes described wind speed measuring device be positioned at the wheel hub front of described wind-powered electricity generation unit, with the wheel hub synchronous rotary of described wind-powered electricity generation unit.
A kind of blower fan wind measurement method provided by the invention, device and system, adopt according to the relative position of measurement point, calculate the emission angle of the first measurement ripple, according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second, receive described second and measure ripple, measure ripple and described second according to described first and measure ripple, obtain the speed of described air-flow, expanded measuring wind speed scope.
Accompanying drawing explanation
Fig. 1 is the blower fan wind measurement method process flow diagram of one embodiment of the invention;
Fig. 2 is the blower fan wind measurement method process flow diagram of another embodiment of the present invention;
Fig. 3 is the blower fan wind speed measuring device structural drawing of another embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present application clearer, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is the application's part embodiment, rather than whole embodiment.Based on the embodiment in the application, those of ordinary skills are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
The schematic flow sheet of the blower fan wind measurement method that Fig. 1 provides for the embodiment of the present invention one, as shown in Figure 1, the blower fan wind measurement method of the present embodiment comprises:
101, according to the relative position of measurement point, calculate the first emission angle of measuring ripple.
102, according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second.
103, receive described second and measure ripple.
Concrete, according to the speed of described the first measurement ripple, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple, the transmission time sum of measuring ripple according to the described first transmission time and described second of measuring ripple receives described second and measures ripple after ripple is measured in transmitting described first.
104, measure ripple and described second according to described first and measure ripple, obtain the speed of described air-flow.
Concrete, measure wave frequency and described second according to described first and measure wave frequency, adopt Doppler shift formula to calculate the speed of described air-flow.After 104, also can comprise: aweather group of motors sends the speed of described air-flow, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy.
In the present embodiment, adopt according to the relative position of measurement point, calculate the emission angle of the first measurement ripple, according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second, receives described second and measures ripple, measures ripple and described second measure ripple according to described first, obtain the speed of described air-flow, expanded measuring wind speed scope.
The schematic flow sheet of the blower fan wind measurement method that Fig. 2 provides for the embodiment of the present invention two, as shown in Figure 2, the blower fan wind measurement method of the present embodiment comprises:
201,, according to the relative position of measurement point and wind-powered electricity generation unit, calculate the emission angle of the first measurement ripple.
Concrete, measurement point place plane is positioned at blade front, and is parallel to impeller place plane, and the distance of measurement point place plane and impeller place plane is preset value, and wherein, the value of preset value is relevant with independent pitch strategy.Wind speed measuring device is positioned at impeller front, on the axis of wheel hub.Arrive the vertical range of wind speed measuring device according to measurement point place plane, can calculate the emission angle of the first measurement ripple.
202, according to the emission angle of described the first measurement ripple, adjust emission angle.
Concrete, according to the emission angle of the first measurement ripple calculating, can adopt phased-array technique to adjust emission angle, make emission angle equal the emission angle of the first measurement ripple, first measures ripple propagates towards measurement point direction.Wherein, adopt phased-array technique can make emission angle adjust within the scope of certain solid angle.By continuous adjustment emission angle, measure the wind speed of different measuring point, and then the wind speed of diverse location on the acquisition impeller corresponding with measurement point.
It should be noted that, also can adopt other mechanical systems, emission angle is adjusted, make emission angle equal the emission angle of the first measurement ripple, embodiment, referring to related content of the prior art, repeats no more herein.
203, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second.
Concrete, wind speed measuring device is launched described first and is measured ripple, first measures ripple along rectilinear propagation, arrive after measurement point, ripple is measured in the air-flow reflection second that is aerogel state of measured some position, due to the speed of described air-flow, i.e. wind speed, make the first measurement ripple and second measure ripple frequency different, and the second measurement wave frequency is relevant with the first measurement wave frequency with wind speed.
204,, according to the speed of described the first measurement ripple, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple.
Concrete, it is identical that the first measurement ripple and second is measured the aerial speed of ripple, and the distance according to measurement point to wind speed measuring device can be calculated the first measurement ripple and second and measure the aerial transmission time sum of ripple.
205, the transmission time sum of measuring ripple according to the described first transmission time and described second of measuring ripple receives described second and measures ripple after ripple is measured in transmitting described first.
Concrete, start timing in the moment of sending described the first measurement ripple, measure after ripple and second is measured the aerial transmission time sum of ripple and receive described the second measurement ripple through described first.Because the first measurement ripple exists multiple reflections in transmitting procedure, need to be received in second of measurement point position reflection and measure ripple, therefore, need to start timing in the moment of sending described the first measurement ripple, measuring through the described first transmission time and described second of measuring ripple the measurement ripple receiving after the transmission time sum of ripple is described the second measurement ripple.
206, measure wave frequency and described second according to described first and measure wave frequency, adopt Doppler shift formula to calculate the speed of described air-flow.
Concrete, measure wave frequency according to the first measurement wave frequency and second, adopt Doppler shift formula to calculate the speed of described measurement point air-flow, owing to measuring, the aerial transfer rate of ripple is very fast, single measurement required time is shorter, and the real-time of measurement is better.
207, aweather group of motors sends the speed of described air-flow, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy.
Concrete, can adopt communication aweather the master control system of group of motors send the wind speed of described measurement point, to avoid master control system because being electrically connected and being struck by lightning with wind measuring device.The master control system of described wind-powered electricity generation unit is utilized the speed of the air-flow of described measurement point, obtains on blade and the wind speed of measurement point opposite position, and then obtains independent pitch strategy, and blade angle is adjusted, and reduces the load of wind-powered electricity generation unit.
While needs, explanation is, because emission angle is adjusted within the scope of certain solid angle, so the position of measurement point is subject to the restriction of solid angle, that is to say, the size of measuring wind speed scope and the size of solid angle have direct relation, and more measuring wind speed scope is larger for solid angle.Because the technique that emission angle is adjusted within the scope of larger solid angle is more complicated, can adopt wind speed measuring device quantity corresponding with blade quantity, each wind speed measuring device is by regulating emission angle along blade radial direction, wind speed to measurement point is measured, and realizes and reduces the complex process degree that emission angle is adjusted.
It should be noted that in addition, can adopt emitter and impeller synchronous rotary, make wind speed measuring device relative with impeller location fixing, wind speed measuring device easily by measurement point position with on blade, be associated with measurement point opposite position, and then on acquisition blade with the wind speed of measurement point opposite position, reduced calculated amount.Meanwhile, owing to can obtaining on blade and the wind speed of measurement point opposite position, and then obtain the wind speed of diverse location on blade by changing measurement point, if increase the density of measurement point, can improve the measuring accuracy of blade wind speed, improve the accuracy of independent pitch strategy.
In the present embodiment, adopt according to the relative position of measurement point, calculate the emission angle of the first measurement ripple, according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second, receives described second and measures ripple, measures ripple and described second measure ripple according to described first, obtain the speed of described air-flow, expanded measuring wind speed scope.
The structural representation of the blower fan wind speed measuring device that Fig. 3 provides for the embodiment of the present invention three, as shown in Figure 3, the blower fan wind speed measuring device of the present embodiment comprises:
Computing module 31, the relative position for basis with measurement point, the emission angle of ripple is measured in calculating first;
Transmitter module 32, for according to the emission angle of described the first measurement ripple, launches described first to described measurement point and measures ripple, and to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second;
Receiver module 33, measures ripple for receiving described second;
Processing module 34, measures ripple for measuring ripple and described second according to described first, obtains the speed of described air-flow.
Further, receiver module is specifically for measuring the speed of ripple according to described first, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple, the transmission time sum of measuring ripple according to the described first transmission time and described second of measuring ripple receives described second and measures ripple after ripple is measured in transmitting described first.
Further, processing module is measured wave frequency specifically for measuring wave frequency and described second according to described first, adopts Doppler shift formula to calculate the speed of described air-flow.
Described wind speed measuring device also can further comprise sending module, sends the speed of described air-flow for group of motors aweather, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy.
Concrete, computing module according to the relative position of measurement point, calculate the emission angle of the first measurement ripple, transmitter module is according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second, receiver module is according to the speed of described the first measurement ripple, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple, measure the transmission time sum of ripple according to the described first transmission time and described second of measuring ripple, after ripple is measured in transmitting described first, receive described second and measure ripple, processing module is measured wave frequency and described second according to described first and is measured wave frequency, adopt Doppler shift formula to calculate the speed of described air-flow, sending module aweather group of motors sends the speed of described air-flow, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy.
It should be noted that, described sending module can adopt wired or wireless mode aweather group of motors send the wind speed of described measurement point.In the present embodiment, can specifically adopt wireless mode aweather group of motors send the wind speed of described measurement point.
The present embodiment also provides a kind of blower fan wind velocity measurement system, comprising: wind speed measuring device and wind-powered electricity generation unit.Described wind speed measuring device is connected with the wheel hub of described wind-powered electricity generation unit, makes described wind speed measuring device be positioned at the wheel hub front of described wind-powered electricity generation unit, with the wheel hub synchronous rotary of described wind-powered electricity generation unit.
Concrete, wind speed measuring device is connected with described wheel hub, with described wheel hub synchronous rotary, again due to wheel hub and blade synchronization rotation, make wind speed measuring device relative with blade static, easily by measurement point position with on blade, be associated with measurement point opposite position, and then obtain on blade and the wind speed of measurement point opposite position, reduced calculated amount.Meanwhile, owing to can obtaining on impeller and the wind speed of measurement point opposite position, and then obtain the wind speed of diverse location on blade by changing measurement point, if increase the density of measurement point, can improve the measuring accuracy of blade wind speed, improve the accuracy of independent pitch strategy.
Further, described wind speed measuring device quantity is corresponding with blade quantity.
Concrete, for three-vaned wind-powered electricity generation unit, adopt three wind speed measuring devices to be mutually 120 degree angles, lay respectively at blade front, each wind speed measuring device is by regulating emission angle along blade radial direction, wind speed to measurement point is measured, and then obtains on blade and the wind speed of measurement point opposite position, realizes and reduces the complex process degree that emission angle is adjusted.
In the present embodiment, adopt computing module according to the relative position of measurement point, calculate the emission angle of the first measurement ripple, transmitter module is according to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second, receiver module receives described second and measures ripple, processing module is measured ripple and described second according to described first and is measured ripple, obtain the speed of described air-flow, expanded measuring wind speed scope.
In technical solution of the present invention, the scan period of wind speed measuring device is Millisecond, wherein, n the sampling angle emission measurement ripple that in scan period, transmitter unit will be in the angular range of setting, receiving element receives reflection wave simultaneously, by the wind speed measuring device of such setting, can realize the real-time measurement of wind speed, and measured wind speed is exactly the actual wind speed that is subject to air blade, greatly improved the work efficiency that becomes slurry system.
One of ordinary skill in the art will appreciate that: all or part of step that realizes above-mentioned each embodiment of the method can complete by the relevant hardware of programmed instruction.Aforesaid program can be stored in a computer read/write memory medium.This program, in the time carrying out, is carried out the step that comprises above-mentioned each embodiment of the method; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CDs.
Finally it should be noted that: above each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a blower fan wind measurement method, is characterized in that, comprising:
According to the relative position of measurement point, calculate the first emission angle of measuring ripple;
According to the emission angle of described the first measurement ripple, launch described first to described measurement point and measure ripple, to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second;
Receive described second and measure ripple;
Measure ripple and described second according to described first and measure ripple, obtain the speed of described air-flow.
2. blower fan wind measurement method according to claim 1, is characterized in that, ripple is measured in described reception described second, comprising:
According to the speed of described the first measurement ripple, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple;
The transmission time sum of measuring ripple according to the described first transmission time and described second of measuring ripple receives described second and measures ripple after ripple is measured in transmitting described first.
3. blower fan wind measurement method according to claim 1 and 2, is characterized in that, described according to described the first measurement ripple and described the second measurement ripple, obtains the speed of described air-flow, comprising:
Measure wave frequency and described second according to described first and measure wave frequency, adopt Doppler shift formula to calculate the speed of described air-flow.
4. according to the blower fan wind measurement method described in the arbitrary claim of claim 1-3, it is characterized in that, also comprise:
Aweather group of motors sends the speed of described air-flow, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy.
5. a blower fan wind speed measuring device, is characterized in that, comprising:
Computing module, the relative position for basis with measurement point, the emission angle of ripple is measured in calculating first;
Transmitter module, for according to the emission angle of described the first measurement ripple, launches described first to described measurement point and measures ripple, and to make described measurement point utilize the air-flow and described first of described measurement point position to measure ripple, ripple is measured in reflection second;
Receiver module, measures ripple for receiving described second;
Processing module, measures ripple for measuring ripple and described second according to described first, obtains the speed of described air-flow.
6. blower fan wind speed measuring device according to claim 5, is characterized in that, described receiver module specifically for:
According to the speed of described the first measurement ripple, calculate described first and measure the transmission time of ripple and the transmission time sum of described the second measurement ripple;
The transmission time sum of measuring ripple according to the described first transmission time and described second of measuring ripple receives described second and measures ripple after ripple is measured in transmitting described first.
7. according to the blower fan wind speed measuring device described in claim 5 or 6, it is characterized in that, described processing module specifically for:
Measure wave frequency and described second according to described first and measure wave frequency, adopt Doppler shift formula to calculate the speed of described air-flow.
8. according to the blower fan wind speed measuring device described in the arbitrary claim of claim 5-7, it is characterized in that, also comprise:
Sending module, sends the speed of described air-flow, to make described wind-powered electricity generation unit utilize the speed of described air-flow to obtain independent pitch strategy for group of motors aweather.
9. a blower fan wind velocity measurement system, is characterized in that, comprises wind speed measuring device and wind-powered electricity generation unit described in the arbitrary claim of claim 5-8;
Described wind speed measuring device is connected with the wheel hub of described wind-powered electricity generation unit, makes described wind speed measuring device be positioned at the wheel hub front of described wind-powered electricity generation unit, with the wheel hub synchronous rotary of described wind-powered electricity generation unit.
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| CN201210401055.4A CN103777035B (en) | 2012-10-19 | 2012-10-19 | Blower fan wind measurement method, device and system |
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| CN201210401055.4A CN103777035B (en) | 2012-10-19 | 2012-10-19 | Blower fan wind measurement method, device and system |
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| CN103777035A true CN103777035A (en) | 2014-05-07 |
| CN103777035B CN103777035B (en) | 2016-05-18 |
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