CN203117222U - Wind power plant ultrasonic wind speed detection device - Google Patents
Wind power plant ultrasonic wind speed detection device Download PDFInfo
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- CN203117222U CN203117222U CN 201320117405 CN201320117405U CN203117222U CN 203117222 U CN203117222 U CN 203117222U CN 201320117405 CN201320117405 CN 201320117405 CN 201320117405 U CN201320117405 U CN 201320117405U CN 203117222 U CN203117222 U CN 203117222U
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Abstract
The utility model relates to a wind power plant ultrasonic wind speed detection device which mainly comprises a base (1), a supporting structure and a circuit module. The base (1) is fixed on a wind detection mast or fixed frames in places, where wind speed needs to be tested, in a wind power plant, screw holes are formed in the center of the base (1), the base (1) is connected with a stainless steel barrel (2) of the supporting structure through screws, the supporting structure is fixed on the base (1), and the circuit module is arranged in the stainless steel barrel (2) of the supporting structure. Compared with an existing wind detection method, the wind power plant ultrasonic wind speed detection device can achieve the effect that in the wind speed detection process, influences on obtaining ultrasonic pulse signals in the ultrasonic wind speed detection device by the supporting structure, eddy covariance and other external conditions can be lowered to the minimum.
Description
Technical field
The present invention relates to a kind of ultrasonic measuring device, particularly a kind of detection method and device that utilizes ultrasonic measurement wind farm wind velocity, wind direction.
Background technology
Along with the minimizing gradually of fossil energy, wind energy is as a kind of pollution-free and contain the energy of huge energy, and its development and use are subjected to people and pay close attention to.The total amount of whole world wind energy is about 1.3*105GW according to statistics, and the main form of utilizing of wind energy is wind-power electricity generation, and global wind energy industry is just with annual 20% speedup expansion, and the wind energy industry gross output value in 2015 will increase to 5 times of present level.Exploitation and construction along with large-scale wind power field, the research work of wind energy turbine set planning and operation is more and more important, reach security of system stable operation and this target of maximum using wind energy, no matter be before the addressing of wind-powered electricity generation unit is installed or after the wind energy turbine set operation, all be necessary very much the wind speed temperature is monitored in real time.
Parameter detecting such as wind speed, wind direction, temperature play a key effect the in service of wind energy turbine set, set up automatic meteorologic parameter research station one after another in American-European and Asia minority developed country, set up the historical data that comprises wind power station, the database of surveying wind data, temperature data, wind energy turbine set resource evaluation data, the forecast of wind energy turbine set parameter and service profile.
At present the wind speed and direction that adopts of domestic wind energy measuring station and temperature measurement equipment are based on different technology, the wind speed and direction checkout equipment is mechanical, there are rotatable parts in mechanical equipment, is easy to generate wearing and tearing, may be subjected to the infringement of inclement weather (sand and dust and salt fog etc.).Simultaneously because the existence of friction, when being lower than the startup value, wind speed can not drive screw propeller or vane is rotated.Thermopair, thermal resistance etc. are then adopted in temperature survey, have problems such as precision is not high.The employing ultrasonic technology can be to wind speed, wind direction and temperature simultaneously measuring, has fast, accurate high, the advantage such as measurement range is wide of measuring speed, and utilize high-precision air-flow, temperature real time data can realize three-dimensional air-flow, the reconstruction of temperature flow field picture, satisfy wind energy turbine set to the demand of local ambient wind velocity wind direction and Temperature Distribution.Chinese patent 200810101288.6 " method of ultrasonic wind speed instrument and utilization ultrasonic measurement wind speed and direction " can only be measured two-D wind speed.Chinese patent 201010608611.6 " a kind of wind power generating set ultrasonic wind speed and direction measuring device " also only can be measured two-D wind speed, wind direction; Chinese patent 201110123546.2 " the three-dimensional wind detection method of ultrasound wave and three-dimensional ultrasonic anemoclinograph " can simply obtain tri-dimensional wind speed wind direction, but when wind direction during perpendicular to a pair of level probe wherein, cause 2 pairs of suffered wind-force of probe bracket on the horizontal direction to differ greatly, influence measuring accuracy to a certain extent.
Summary of the invention
The present invention seeks to overcome the deficiency of existing two-dimensional ultrasonic wind speed, wind direction technology, propose a kind of novel wind power field three-dimensional ultrasonic wind speed, direction measuring apparatus.The present invention has broad application prospects in fields such as environment, the energy and meteorologies.
The present invention is by the following technical solutions:
Wind energy turbine set ultrasonic wind speed pick-up unit of the present invention utilizes the direct time difference method realization of ultrasonic pulse to the comprehensive detection of the three-dimensional wind speed of wind energy turbine set.At first utilize three ultrasonic probes of forming 120 degree angles that timesharing is transmitted and received ultrasonic pulsative signal, Time Calculation according to the distance between every pair of ultrasonic probe and ultrasonic pulsative signal transmission obtains ultrasonic probe to the wind speed on the direction of place then, calculates actual three-dimensional wind speed, wind direction value at last.
The present invention installs the small rack stress equalization of ultrasonic probe when utilizing the ultrasonic probe of 120 degree angles to the wind comes from any one direction to making, reduce measuring error.
Wind energy turbine set ultrasonic wind speed pick-up unit of the present invention comprises: base, supporting construction and circuit module.Described base is fixed on any fixed mount that needs measuring wind of anemometer tower or wind energy turbine set, and the base center has screw, connects the stainless steel cylinder of supporting construction by screw.The base shape can be circular also can be square, also can be designed to arbitrary shape according to the wind energy turbine set installation environment.Supporting construction is fixed on the base, and circuit module places in the stainless steel cylinder of supporting construction.
Described supporting construction mainly comprises the stainless steel cylinder of holding circuit module, 6 gage beams, support the bracing frame of gage beam, support support and 6 ultrasonic probes of gage beam.The bottom of described stainless steel cylinder is fixed on the base by screw, and the upper end of stainless steel cylinder connects support.The shape of stainless steel cylinder can also can be cuboid or other any cylinder body shape for cylindrical.Described bracing frame comprises first bracing frame and second bracing frame, and the lower end of first bracing frame directly links to each other with support, the upper end sealing of first bracing frame; The upper end of second bracing frame links to each other with support, the lower end sealing of second bracing frame.First bracing frame and second bracing frame are symmetrically distributed up and down.Described support is to be formed through brake forming by the support bar that connects first bracing frame and second bracing frame, and support bar can be twice right-angle bending or arc-shaped bend.Described support bar can be 1, also can be 2 or 3, and support bar is hollow structure.When adopting 2 support bars, 2 support bars are positioned at same plane; When adopting 3 support bars, then 3 support bars become 120 ° of placements.Support plays the effect of fixing first bracing frame and second bracing frame.First bracing frame is coaxial with second bracing frame, and first bracing frame is vertical with base with the axis of second bracing frame.Bracing frame is the cylindric staving of hollow structure, and the screw of three equally distributed connection gage beams is arranged on the bucket wall of cylindric staving.The screwed end of described 6 gage beams links to each other with bracing frame, and 6 ultrasonic probes are installed in the other end of 6 gage beams respectively.Gage beam is hollow structure.Gage beam is divided into 2 groups, and one group directly is fixed in three screws of first bracing frame by screw thread, and another group is fixed in three screws of second bracing frame by screw thread.3 gage beams of each group all are three-dimensional 120 ° of layouts, and with the axis angle of first bracing frame and second bracing frame be 60 °, the equal in length of 6 gage beams.6 ultrasonic probes are installed on described 6 gage beams the end away from bracing frame respectively, and the plane of departure of ultrasonic probe and gage beam are at an angle of 90,3 ultrasonic probes that guarantee simultaneously to be installed on first bracing frame are relative in twos with 3 ultrasonic probes on being installed in second bracing frame, ultrasonic probe coaxial arrangement facing each other, and the distance between the ultrasonic probe facing each other equates.
Described circuit module is positioned at stainless steel cylinder inside, and the bottom of stainless steel cylinder is fixed on the base by screw, is tightly connected fully between stainless steel cylinder and the base, and circuit module is shielded.Circuit module is mainly shown by CPU (central processing unit), ultrasonic transmission/reception treatment circuit, ultrasonic transmission/reception circuit, data and memory circuit is formed.The control end of CPU (central processing unit) connects ultrasonic transmission/reception treatment circuit, ultrasonic transmission/reception circuit and data respectively and shows and memory circuit.Described CPU (central processing unit) is used for carrying out data to be handled, and sends steering order by signal wire control ultrasonic transmission/reception circuit and ultrasonic transmission/reception treatment circuit.The ultrasonic transmission/reception circuit is used for hyperacoustic transmitting and receiving, and mainly is made up of coupling radiating circuit, filtering circuit and amplifying circuit.The signal input part of coupling radiating circuit connects CPU (central processing unit), and output terminal connects ultrasonic probe.The input end of filtering circuit connects ultrasonic probe, the input end of circuit of output terminal amplifying circuit, and the output terminal of amplifying circuit connects the signal input part of ultrasonic transmission/reception treatment circuit.At first radiating circuit emission ultrasonic signal carries out received ultrasonic signal by corresponding ultrasonic probe then, and the ultrasonic signal that receives carries out being handled by the ultrasonic transmission/reception treatment circuit behind filtering circuit and the amplifying circuit.The ultrasonic transmission/reception treatment circuit is used for measuring the aerial travel-time of ultrasound wave.The core of described ultrasonic transmission/reception treatment circuit is the TDC-GP1 chip, it is that ACAM company is based on split-second precision numeral (the Time digital converter) conversion chip of 0.8uCMOS technological design, it utilizes the time-delay collimation method accurately to measure the time interval between two pulses or a plurality of pulse, the single channel measuring accuracy is 250ps, binary channels coupling precision can reach 150ps, measurement range does not wait from 3ns-200ms, so its measuring accuracy height not only, and measurement range is also very big.
Adopt the method for wind energy turbine set ultrasonic wind speed pick-up unit measuring wind of the present invention and wind direction as follows:
Six ultrasonic probes in the wind energy turbine set ultrasonic wind speed pick-up unit of the present invention are divided into 2 groups, wherein first ultrasonic probe, second ultrasonic probe and the 3rd ultrasonic probe are fixed on first bracing frame by first gage beam, second gage beam and the 3rd gage beam respectively, and three gage beams become 120 ° of arrangements, and 3 gage beams and central axis are 60 ° of angles.The 4th ultrasonic probe, the 5th ultrasonic probe and the 6th ultrasonic probe are fixed on second bracing frame by the 4th gage beam, the 5th gage beam and the 6th gage beam respectively, and three gage beams become 120 ° of arrangements, and 3 gage beams and central axis are 60 ° of angles.
First ultrasonic probe and the 5th ultrasonic probe positioned opposite among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing the ultrasonic transmission/reception treatment circuit to measure respectively to receive from the other side.
Second ultrasonic probe and the 6th ultrasonic probe positioned opposite among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing the ultrasonic transmission/reception treatment circuit to measure respectively to receive from the other side.
The 3rd ultrasonic probe and the 4th ultrasonic probe positioned opposite among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing the ultrasonic transmission/reception treatment circuit to measure respectively to receive from the other side.
Wherein the distance between the distance between first ultrasonic probe and the 5th ultrasonic probe and second ultrasonic probe and the 6th ultrasonic probe and the distance between the 3rd ultrasonic probe and the 4th ultrasonic probe equate.
The wind speed that utilizes direct time difference method to calculate respectively on the relative rectilinear direction with the 5th ultrasonic probe of first ultrasonic probe is v1, wind speed on the relative rectilinear direction with the 6th ultrasonic probe of second ultrasonic probe is v2, wind speed on the relative rectilinear direction with the 4th ultrasonic probe of the 3rd ultrasonic probe is v3, then according to the orientation of setting up of this wind energy turbine set ultrasonic wind speed pick-up unit, the wind speed component direction of determining v1 in the horizontal direction projection and geographical co-ordinate system in the angle of positive north orientation, suppose that angle is θ, then can calculate the horizontal wind speed V of parallel positive north orientation under the geographic coordinate
x, vertical positive north orientation horizontal wind speed V
yWith vertical velocity V
z:
Wherein
Be the bracing frame of fixation measuring arm and the angle of central vertical shaft, among the present invention be 60 °
Known V
x, V
y, V
z, then can obtain mean wind speed V and horizontal wind angle φ:
From formula (5) as can be seen in the ultrasonic wind speed detection system horizontal wind angle equal the arc-tangent value of horizontal wind speed ratio, by the tangent value definition as can be known, the wind angle that obtains through arc tangent exists
Arrive
Between, therefore the horizontal wind direction of actual response need further determine wind angle according to the horizontal wind speed value fully.At first utilize
After trying to achieve the absolute value of wind angle, again according to horizontal wind speed V
xAnd V
yThe final judgement of value wind angle.In surface level, x direction and y direction coordinate system are divided into four quadrants simultaneously, work as V
x＞0, V
y＞0 o'clock, then wind angle was positioned at the I quadrant.Work as V
x＜0, V
y＞0 o'clock, wind angle was positioned at the II quadrant, worked as V
x＜0, V
y＜0 o'clock, wind angle was positioned at the III quadrant, worked as V
x＞0, V
y＞0 o'clock, wind angle was positioned at fourth quadrant, utilized the method to determine concrete wind angle.
Wind energy turbine set ultrasonic wind speed pick-up unit of the present invention utilization is three groups of ultrasonic probes of 120 ° of subtended angles to replacing the transmitting/receiving acoustic signals, and two ultrasonic probes of each group ultrasonic probe centering are alternately launched acoustic signals and received the pulse signal of launching from the ultrasonic probe on opposite.The present invention compares with existing wind detection method, and the wind energy turbine set ultrasonic wind speed pick-up unit that the present invention proposes can guarantee that other external condition such as supporting framework, vortex correlation is obtained the influence that causes to the ultrasonic pulsative signal in the ultrasonic wind speed pick-up unit in measuring wind speed and drop to minimum.
Description of drawings
Fig. 1 wind energy turbine set ultrasonic wind speed pick-up unit synoptic diagram;
Fig. 2 wind energy turbine set ultrasonic wind speed pick-up unit schematic diagram;
Fig. 3 wind energy turbine set ultrasonic wind speed detects support;
The inner theory diagram of Fig. 4 TDC-GP1;
Fig. 5 coordinate system synoptic diagram;
Among the figure: 1 base, 2 stainless steel cylinders, 3 first bracing frames, 4 first gage beams, 5 first ultrasonic probes, 6 second gage beams, 7 second ultrasonic probes, 8 the 4th ultrasonic probes, 9 the 4th gage beams, 10 second bracing frames, 11 the 5th gage beams, 12 the 5th ultrasonic probes, 13 the 6th gage beams, 14 the 6th ultrasonic probes, 15 the 3rd ultrasonic probes, 16 the 3rd gage beams, 17 supports, 18 CPU (central processing unit), 19 ultrasonic transmission/reception treatment circuits, 20 wind speed and directions calculate algorithm, and 21 data show and memory circuit, 22 ultrasonic transmission/reception circuit, 23 arc supports.
Embodiment
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Three groups of ultrasonic probes of the present invention are right to the first group of ultrasonic probe that is respectively first ultrasonic probe 5 and the 5th ultrasonic probe 12 compositions, second group of ultrasonic probe that second ultrasonic probe 7 and the 6th ultrasonic probe 14 are formed is right, and the 3rd group of ultrasonic probe that the 3rd ultrasonic probe 15 and the 4th ultrasonic probe 8 are formed is right.
Wind energy turbine set ultrasonic wind speed pick-up unit of the present invention mainly comprises: base 1, supporting construction and circuit module as shown in Figure 1.Supporting construction is fixed on the base 1, and circuit module places in the stainless steel cylinder 2 of supporting construction.
Described base 1 is fixed on any fixed mount that needs measuring wind of anemometer tower or wind energy turbine set, and base 1 center has screw, connects to form the stainless steel cylinder 2 of supporting construction by screw.Base 1 shape can be circular also can be square, also can be designed to arbitrary shape according to the wind energy turbine set installation environment.
Described supporting construction mainly comprise the holding circuit plate stainless steel cylinder 2, first gage beam 4, second gage beam 6, the 3rd gage beam 16, the 4th gage beam 9, the 5th gage beam 11, the 6th gage beam 13, first bracing frame 3, second bracing frame 10, support support 17 and 6 ultrasonic probes of gage beam.
The bottom of described stainless steel cylinder 2 is fixed on the base 1 by screw, and the upper end of stainless steel cylinder 2 connects support 17.The shape of stainless steel cylinder 2 can also can be cuboid or other any cylinder body shape for cylindrical.First bracing frame 3 and second bracing frame 10 are the cylindric staving of hollow structure, and the screw of three equally distributed connection gage beams is arranged on the bucket wall of cylindric staving.The lower end of first bracing frame 3 directly links to each other with support 17, the upper end sealing of first bracing frame 3; The upper end of second bracing frame 10 links to each other with support 17, the lower end sealing of second bracing frame 10.First bracing frame 3 and second bracing frame 10 are symmetrically distributed up and down.Described support 17 is to be formed through brake forming by the support bar that connects first bracing frame 3 and second bracing frame 10, and support bar can be twice right-angle bending or arc-shaped bend, respectively shown in the support 17 and the arc support 23 among Fig. 2 as shown in Figure 1.Described support bar can be 1, also can be 2 or 3, and support bar is hollow structure.When adopting 2 support bars, 2 support bars are positioned at same plane; When adopting 3 support bars, then 3 support bars become 120 ° of placements.Support 17 plays the effect of fixing first bracing frame 3 and second bracing frame 10.First bracing frame 3 is coaxial with second bracing frame 10, and first bracing frame 3 is vertical with base with the axis of second bracing frame 10.
Described 6 gage beam one ends are threaded, and the other end connects ultrasonic probe, and gage beam is hollow structure.Gage beam is divided into 2 groups, wherein first gage beam 4, second gage beam 6 and the 3rd gage beam 16 are one group, be fixed in three screws of first bracing frame 3, the three-dimensional angle between three gage beams is 120 °, with the axis angle of first bracing frame 3 and second bracing frame 10 be 60 °.The 4th gage beam 9, the 5th gage beam 11 and the 6th gage beam 13 are another group, are fixed on second bracing frame 10, and the three-dimensional angle between same three gage beams is 120 °, with the axis angle of first bracing frame 3 and second bracing frame 10 be 60 °.The equal in length of 6 gage beams.The axis of first bracing frame 3 and second bracing frame 10 is parallel with the central axis of stainless steel cylinder 2.6 ultrasonic probes are installed in described 6 gage beams respectively away from an end of bracing frame, and the plane of departure of ultrasonic probe and gage beam are at an angle of 90.In 6 ultrasonic probes, first ultrasonic probe 5 is relative with the 5th ultrasonic probe 12, second ultrasonic probe 7 is relative with the 6th ultrasonic probe 14, and the 3rd ultrasonic probe 15 is relative with the 4th ultrasonic probe 8, and the air line distance between the every pair of ultrasonic probe equates.Described bracing frame 17, first bracing frame 3, second bracing frame 10, first gage beam 4, second gage beam 6, the 3rd gage beam 16, the 4th gage beam 9, the 5th gage beam 11 and the 6th gage beam 13 all adopt hollow structure, are connected by lead between ultrasonic probe and the circuit board.Described 6 ultrasonic probes both can be used as emission and also can be used as the reception use.
Described circuit module is positioned at stainless steel cylinder 2 inside, and is supported by base 1.Circuit module is mainly shown by CPU (central processing unit) 18, ultrasonic transmission/reception treatment circuit 19, ultrasonic transmission/reception circuit 22, data and memory circuit 21 is formed.The control end of CPU (central processing unit) 18 connects ultrasonic transmission/reception treatment circuit 19, ultrasonic transmission/reception circuit 22 and data respectively and shows and memory circuit 21.At first CPU (central processing unit) 18 is sent the control signal that steering order is given ultrasonic transmission/reception circuit 22 and ultrasonic transmission/reception treatment circuit 19 simultaneously, make a pair of ultrasonic probe wherein begin to transmit and receive ultrasonic signal respectively, simultaneously the control signal sent according to CPU (central processing unit) 18 of ultrasonic transmission/reception treatment circuit 19 and the ultrasonic signal that receives calculate the time interval between emission ultrasonic signal and the reception wave pulse signal, CPU (central processing unit) 18 is calculated algorithm 20 according to the time of calculating by wind speed and direction and is calculated the wind speed and direction value, the wind speed of calculating then, the wind direction value be transported to by serial ports that data show and memory circuit 21 in data are shown and store.
Described CPU (central processing unit) 18 is used for carrying out data to be handled, and sends steering order by signal wire control ultrasonic transmission/reception circuit 22 and ultrasonic transmission/reception treatment circuit 19.
Described ultrasonic transmission/reception circuit 22 is mainly used in hyperacoustic transmitting and receiving, and ultrasonic transmission/reception circuit 22 mainly is made up of coupling radiating circuit and receiving circuit, and receiving circuit is divided into filtering circuit and amplifying circuit again.The signal input part of coupling radiating circuit connects CPU (central processing unit), and output terminal connects ultrasonic probe.The input end of filtering circuit connects ultrasonic probe, the input end of circuit of output terminal amplifying circuit, and the output terminal of amplifying circuit connects the signal input part of ultrasonic transmission/reception treatment circuit.
Ultrasonic transmission/reception treatment circuit 19 is used for measuring the aerial travel-time of ultrasound wave.
Fig. 2 is the principle schematic of wind energy turbine set ultrasonic wind speed pick-up unit.As shown in Figure 2, the wind energy turbine set ultrasonic detection device comprises that CPU (central processing unit) 18, ultrasonic transmission/reception treatment circuit 19, ultrasonic transmission/reception circuit 22, wind speed and direction calculate algorithm 20, data show and memory circuit 21.Described CPU (central processing unit) 18 adopts STM32F103RBT6, STM32F103 is based on 32 embedded microprocessors of Cortex-M3 kernel, it is the ARM that does not need operating system, compare with similar single-chip microcomputer, STM32F103 has the Cortex-M3 kernel of leading framework, outstanding power consumption efficiency, abundant peripheral hardware, perfect firmware library and abundant example program, the STM32F103RBT6 single-chip microcomputer carries 12 AD of 16 external channels in addition, slewing rate is fast, the precision height, just in time satisfy this matching requirements, this single-chip microcomputer can send various steering orders, wind speed, the wind direction computing method are also by this chip microcontroller.
Described ultrasonic transmission/reception circuit 22 mainly is made up of coupling radiating circuit and receiving circuit, and the transmitting terminal that the coupling radiating circuit connects ultrasonic probe is connected 2 diodes of employing between the receiving end of ultrasonic probe and isolates interference problem between the small-signal of the high-voltage signal of emission and reception with receiving circuit.The coupling radiating circuit is realized resonance and the impedance matching of ultrasonic probe, and realizes the output of ultrasound wave emissive power.The coupling radiating circuit signal input part connect CPU (central processing unit) 18 by lead, given the signal input part of match circuit by CPU (central processing unit) 18 transponder pulse control signals.The transmitting terminal of coupling radiating circuit directly connects ultrasonic probe.Match circuit mainly is made up of matching transformer and coupling inductance, and the matching voltage device directly links to each other with the coupling inductance.Under the resonance matching status, ultrasonic probe presents pure configuration, can realize the maximization of electric power output.Therefore the present invention has 6 ultrasonic probes, adopts 6 tunnel emission match circuits to realize accurate coupling to ultrasonic probe.Receiving circuit mainly is made up of pre-amplification circuit and filtering circuit, and the signal input part of pre-amplification circuit connects ultrasonic probe after by diode, and output terminal connects filtering circuit.Pre-amplification circuit realizes receiving the amplification of signal, and filtering circuit is realized the anti-aliasing filtering of received ultrasonic signal, and filtering noise, improves the signal to noise ratio (S/N ratio) of signal.Ultrasonic probe receive from behind the ultrasonic pulse signal of opposite ultrasonic probe at first after filtration wave circuit carry out filtering, the ultrasonic signal after filtering is handled is connected to ultrasonic transmission/reception treatment circuit 19 through lead.The filtering circuit that the present invention adopts is Butterworth FIR wave filter, for avoiding crosstalking of signal between 6 probe time-sharing work analog switches, adopt 6 groups of Butterworth FIR wave filters to be respectively signal that every ultrasonic probe receives and carry out filtering and handle.The purpose of ultrasonic transmission/reception treatment circuit 19 is to measure the aerial travel-time of ultrasound wave, the present invention adopts special chip TDC-GPI to realize, TDC-GP1 is that ACAM company is based on split-second precision numeral (the Time digital converter) conversion chip of 0.8uCMOS technological design, it utilizes the time-delay collimation method accurately to measure the time interval between two pulses or a plurality of pulse, the single channel measuring accuracy is 250ps, binary channels coupling precision can reach 150ps, each passage can respond 4 pulse signals, measurement range does not wait from 3ns-200ms, therefore its measuring accuracy height not only, measurement range is also very big.As shown in Figure 4, chip TDC-GP1 mainly is by the delay line measuring unit, prefix operation device, main arithmetical unit and 22 controls, state and data registers, and formations such as RLC measuring unit and microcontroller interface.The measurement of TDC-GP1 divides by distance two kinds of patterns, is measurement range 1 and measurement range 2.Measurement range 1 can be surveyed the time interval between the 3ns-7.6us, and its measurement task mainly is to be responsible for by the delay line measuring unit; And measurement range 2 arranges for wide range, and its measuring intervals of TIME is 60ns-200ms, finishes its measurement and then must cooperate use to delay line measuring unit and scope 2 counters.Scope 2 counters are counters of a 16bit, and its counting clock is relevant with the external reference clock.Adopt the method for counting of measurement range 2 among the present invention, TDC-GP1 also provides the resolution adjustment modes simultaneously, under this adjustment modes, the resolution of two passages of TDC-GP1 is to obtain stable resolution value by the adjustment to core voltage, this frequency values arranges register and realizes by writing software, its core voltage is regulated by phaselocked loop, the resolution that can guarantee TDC-GP1 like this is with regard to the influence that is not subjected to external temperature and voltage and keep stable, TDC-GP1 controls by STM32F103RBT6, can accurately calculate the aerial travel-time of ultrasonic signal.
Described wind speed and direction calculating algorithm 20 realizes by central processing unit STM32F103RBT6 that mainly concrete computing method are described below:
First ultrasonic probe 5 is relative with the 5th ultrasonic probe 12 among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing ultrasonic transmission/reception treatment circuit TDC-GPI to measure respectively to receive from the other side.
Second ultrasonic probe 7 is relative with the 6th ultrasonic probe 14 among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing ultrasonic transmission/reception treatment circuit TDC-GPI to measure respectively to receive from the other side.
The 3rd ultrasonic probe 15 is relative with the 4th ultrasonic probe 8 among the present invention, timesharing emission ultrasound wave, and receive ultrasonic signal from the other side, the hyperacoustic time of utilizing ultrasonic transmission/reception treatment circuit TDC-GPI to measure respectively to receive from the other side.
As shown in Figure 5, utilize time difference method to calculate first ultrasonic probe 5 respectively and be v1 with wind speed on the 5th ultrasonic probe 12 relative rectilinear directions, second ultrasonic probe 7 is v2 with wind speed on the 6th ultrasonic probe 14 relative rectilinear directions, the 3rd ultrasonic probe 15 is v3 with wind speed on the 4th ultrasonic probe 8 relative rectilinear directions, then according to the orientation of setting up of ultrasonic wind speed instrument, determine the projection in the horizontal direction of v1 direction and the angle of geographical co-ordinate system, suppose that angle is θ, then can calculate the horizontal wind speed V of parallel positive north orientation under the geographic coordinate
x, vertical positive north orientation horizontal wind speed V
yWith vertical velocity V
z:
Wherein
Angle for probe support frame and central vertical shaft.
Known V
x, V
y, V
z, then can obtain mean wind speed V and horizontal wind angle φ:
From formula (5) as can be seen in the ultrasonic wind speed detection system horizontal wind angle equal the arc-tangent value of horizontal wind speed ratio, by the tangent value definition as can be known, the wind angle that obtains through arc tangent exists
Arrive
Between, therefore the horizontal wind direction of actual response need further determine wind angle according to the horizontal wind speed value fully.At first utilize
Behind the absolute value of the wind angle of asking, again according to horizontal wind speed V
xAnd V
yThe final judgement of value wind angle.In surface level, x direction and y direction coordinate system are divided into four quadrants simultaneously, work as V
x＞0, V
y＞0 o'clock, then wind angle was positioned at the I quadrant.Work as V
x＜0, V
y＞0 o'clock, wind angle was positioned at the II quadrant, worked as V
x＜0, V
y＜0 o'clock, wind angle was positioned at the III quadrant, worked as V
x＞0, V
y＞0 o'clock, wind angle was positioned at fourth quadrant, utilized the method to determine concrete wind angle.
Claims (6)
1. a wind energy turbine set ultrasonic wind speed pick-up unit is characterized in that described device mainly comprises: base (1), supporting construction and circuit module; Described base (1) is fixed on any fixed mount that needs measuring wind of anemometer tower or wind energy turbine set, and the center of base (1) has screw, connects the stainless steel cylinder (2) of supporting construction by screw; Described supporting construction is fixed on the base (1), and described circuit module places in the stainless steel cylinder (2) of supporting construction.
2. device according to claim 1, it is characterized in that, described supporting construction comprise the holding circuit plate stainless steel cylinder (2), 6 gage beams (4,6,16,9,11,13), first bracing frame (3), second bracing frame (10), support support (17) and 6 ultrasonic probes of gage beam; The upper end of stainless steel cylinder (2) connects support (17); The lower end of first bracing frame (3) links to each other with support (17), the upper end sealing of first bracing frame (3); The upper end of second bracing frame (10) links to each other with support (17), the lower end sealing of second bracing frame (10); First bracing frame (3) and second bracing frame (10) be symmetric arrangement up and down, and the axis of first bracing frame (3) and second bracing frame (10) is parallel with the central axis of stainless steel cylinder (2); Support (17) is fixed first bracing frame (3) and second bracing frame (10); First bracing frame (3) is coaxial with second bracing frame (10), and first bracing frame (3) is vertical with base with the axis of second bracing frame (10); Bracing frame is the cylindric staving of hollow structure, and the screw of three equally distributed connection gage beams is arranged on the bucket wall of cylindric staving; The screwed end of described 6 gage beams connects bracing frame, and 6 ultrasonic probes are installed in 6 gage beams respectively away from the other end of bracing frame, and the plane of departure of described ultrasonic probe and gage beam are at an angle of 90.
3. device according to claim 2 is characterized in that, described gage beam is hollow structure; 6 gage beams are divided into 2 groups, wherein first gage beam (4), second gage beam (6) and the 3rd gage beam (16) are one group, be fixed in three screws of first bracing frame (3), three-dimensional angle between first gage beam (4), second gage beam (6) and the 3rd gage beam (16) is 120 °, and the axis angle of three gage beams and first bracing frame (3) and second bracing frame (10) is 60 °; The 4th gage beam (9), the 5th gage beam (11) and the 6th gage beam (13) are another group, be fixed on second bracing frame (10), three-dimensional angle between the 4th gage beam (9), the 5th gage beam (11) and the 6th gage beam (13) is 120 °, and the axis angle of three gage beams and first bracing frame (3) and second bracing frame (10) is 60 °; The equal in length of 6 gage beams.
4. device according to claim 3 is characterized in that, the support of described support gage beam (17) is formed by the support bar brake forming that connects first bracing frame (3) and second bracing frame (10); Described support bar is 1 or many; When adopting 2 support bars, 2 support bars are positioned at same plane; When adopting 3 support bars, then 3 support bars become 120 ° of layouts; Described support (17), support bar, first bracing frame (3) and second bracing frame (10) all adopt hollow structure.
5. device according to claim 1 is characterized in that, described circuit module is shown by CPU (central processing unit) (18), ultrasonic transmission/reception treatment circuit (19), ultrasonic transmission/reception circuit (22), data and memory circuit (21) is formed; The control end of CPU (central processing unit) (18) connects ultrasonic transmission/reception treatment circuit (19), ultrasonic transmission/reception circuit (22) and data respectively and shows and memory circuit (21); Described CPU (central processing unit) (18) is carried out the data processing, and sends steering order control ultrasonic transmission/reception circuit (22) and ultrasonic transmission/reception treatment circuit (19) by signal wire; Described ultrasonic transmission/reception circuit (22) is used for hyperacoustic transmitting and receiving, and ultrasonic transmission/reception circuit (22) mainly is made up of coupling radiating circuit and receiving circuit; Receiving circuit is made up of filtering circuit and amplifying circuit; The input end of described coupling radiating circuit connects CPU (central processing unit) (18), and the output terminal of coupling radiating circuit connects ultrasonic probe; The input end of filtering circuit connects ultrasonic probe, the input end of the circuit of output terminal amplifying circuit of filtering circuit, and the output terminal of amplifying circuit connects the signal input part of ultrasonic transmission/reception treatment circuit (19); Ultrasonic transmission/reception treatment circuit (19) is used for measuring the aerial travel-time of ultrasound wave; The wind speed and direction value that data show and memory circuit (21) reception CPU (central processing unit) (18) transmits shows and stores.
6. device according to claim 5 is characterized in that, described ultrasonic transmission/reception treatment circuit (19) adopts chip TDC-GPI; Described ultrasonic transmission/reception treatment circuit (19) adopts method of counting and the resolution adjustment modes of measurement range (2), and controls by the chip STM32F103RBT6 of CPU (central processing unit) (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117405 CN203117222U (en) | 2013-03-14 | 2013-03-14 | Wind power plant ultrasonic wind speed detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320117405 CN203117222U (en) | 2013-03-14 | 2013-03-14 | Wind power plant ultrasonic wind speed detection device |
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| Publication Number | Publication Date |
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| CN203117222U true CN203117222U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320117405 Expired - Lifetime CN203117222U (en) | 2013-03-14 | 2013-03-14 | Wind power plant ultrasonic wind speed detection device |
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| CN (1) | CN203117222U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197096A (en) * | 2013-03-14 | 2013-07-10 | 甘肃省电力公司 | Wind power plant ultrasonic wind speed detection method and device |
| CN112710621A (en) * | 2020-11-30 | 2021-04-27 | 孟祥玉 | Vortex motion correlator |
-
2013
- 2013-03-14 CN CN 201320117405 patent/CN203117222U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103197096A (en) * | 2013-03-14 | 2013-07-10 | 甘肃省电力公司 | Wind power plant ultrasonic wind speed detection method and device |
| CN112710621A (en) * | 2020-11-30 | 2021-04-27 | 孟祥玉 | Vortex motion correlator |
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