WO2020051785A1 - Procédé d'obtention d'informations de posture de roue et radar laser de type à nacelle - Google Patents

Procédé d'obtention d'informations de posture de roue et radar laser de type à nacelle Download PDF

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Publication number
WO2020051785A1
WO2020051785A1 PCT/CN2018/105151 CN2018105151W WO2020051785A1 WO 2020051785 A1 WO2020051785 A1 WO 2020051785A1 CN 2018105151 W CN2018105151 W CN 2018105151W WO 2020051785 A1 WO2020051785 A1 WO 2020051785A1
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WIPO (PCT)
Prior art keywords
signal
impeller
signal processor
distance
cabin
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PCT/CN2018/105151
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English (en)
Chinese (zh)
Inventor
肖增利
周军
黄晨
李智
朱海龙
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南京牧镭激光科技有限公司
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Priority to PCT/CN2018/105151 priority Critical patent/WO2020051785A1/fr
Publication of WO2020051785A1 publication Critical patent/WO2020051785A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/88—Lidar systems specially adapted for specific applications
    • G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
    • Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation

Definitions

  • the disclosure relates to the technical field of wind power generation, and in particular, to a method for acquiring attitude information of an impeller and a cabin-type laser radar.
  • the wind field information is measured by a cabin-type lidar installed on the wind turbine.
  • the cabin-type lidar has the advantages of long detection distance and small interference from the wake of the wind turbine, so it can detect the wind directly in front of the wind turbine.
  • Field information to provide a basis for reducing fan load and yaw correction, so as to achieve maximum fan operation efficiency and increase power generation.
  • the cabin-type laser radar cannot measure the attitude information of the impeller, and because the pulse width of the emitted beam is large When the light beam is blocked by the impeller, the cabin lidar cannot receive a valid signal and cannot output any valid data.
  • the present disclosure provides a method for acquiring attitude information of an impeller and a cabin-type laser radar.
  • an impeller attitude information acquisition method applied to a cabin-type lidar the cabin-type lidar being mounted on a fan, the cabin-type lidar including a laser, a frequency modulator, and a pulse generator And a signal processor; the laser is connected to the frequency modulator, the frequency modulator is connected to the pulse generator, the signal processor is connected to the pulse generator, and the method includes:
  • the signal processor controls the pulse generator to transmit a ranging pulse signal
  • the frequency modulator frequency-modulates the ranging pulse signal and the optical signal to form a first optical pulse signal for transmission
  • the signal processor acquires attitude information of the impeller according to the distance.
  • the signal processor calculating the distance between the cabin-type lidar and the impeller according to a preset number of sampling points of the reflected signal includes:
  • the signal processor is based on Obtaining a distance between the cabin-type lidar and the impeller;
  • R is the distance between the cabin-type lidar and the impeller
  • the POS 1 -POS 0 are preset sampling points of the reflected signal
  • c is the speed of light in a vacuum
  • F s is The sampling frequency at which a light pulse signal is sampled.
  • the acquiring, by the signal processor, the attitude information of the impeller according to the distance includes:
  • the signal processor obtains a pitch angle of the impeller according to the distance, and the pitch angle of the impeller is attitude information of the impeller.
  • the obtaining, by the signal processor, the pitch angle of the impeller according to the distance includes:
  • the signal processor obtains a pitch angle of the impeller according to the horizontal change distance and the vertical change distance.
  • the obtaining of the pitch angle of the impeller by the signal processor according to the horizontal change distance and the vertical change distance includes: Obtain the pitch angle of the impeller.
  • the method further includes:
  • the signal processor controls the pulse generator to transmit a wind measurement pulse signal
  • the frequency modulator frequency-modulates the wind measurement pulse signal and the optical signal to form a second optical pulse signal for transmission
  • the signal processor obtains wind field information according to the power spectrum.
  • the obtaining, by the signal processor, the wind field information according to the power spectrum includes:
  • v los is the radial wind speed of the optical signal
  • los 1,2,3 ... n
  • ⁇ is the wavelength of the optical signal
  • f peak is the peak point frequency in the power spectrum
  • f 0 Is the modulation frequency
  • the signal processor controls the pulse generator to transmit a ranging pulse signal, including:
  • the signal processor calculates a signal-to-noise ratio of the return light signal received at the current moment
  • the signal processor controls the pulse generator to The pulse signal is switched from the wind measurement pulse signal to the ranging pulse signal transmission.
  • a cabin-type lidar the cabin-type lidar being mounted on a fan, the cabin-type lidar including a laser, a frequency modulator, a pulse generator, and a signal processor; the A laser is connected to the frequency modulator, the frequency modulator is connected to the pulse generator, and the signal processor is connected to the pulse generator;
  • the signal processor is configured to control the pulse generator to transmit a ranging pulse signal when detecting that the optical signal emitted by the laser is blocked by an impeller on the fan;
  • the frequency modulator is configured to frequency-modulate the ranging pulse signal and the optical signal to form a first optical pulse signal for transmission;
  • the signal processor is further configured to receive a reflection signal returned after the first light pulse signal is reflected by the impeller;
  • the signal processor is further configured to calculate a distance between the cabin-type lidar and the impeller according to a preset number of sampling points of the reflected signal;
  • the signal processor is further configured to obtain attitude information of the impeller according to the distance.
  • the signal processor is configured to be based on Obtaining a distance between the cabin-type lidar and the impeller;
  • R is the distance between the cabin-type lidar and the impeller
  • the POS 1 -POS 0 are preset sampling points of the reflected signal
  • c is the speed of light in a vacuum
  • F s is The sampling frequency at which a light pulse signal is sampled.
  • the signal processor is configured to obtain a pitch angle of the impeller according to the distance, and the pitch angle of the impeller is attitude information of the impeller;
  • the signal processor is configured to obtain a horizontally varying distance and a vertically varying distance of the impeller within a preset time interval according to the distance;
  • the signal processor is configured to obtain a pitch angle of the impeller according to the horizontal change distance and the vertical change distance.
  • the signal processor is configured to be based on Obtain the pitch angle of the impeller.
  • the signal processor is further configured to control the pulse generator to transmit a wind measurement pulse signal when it is detected that the optical signal emitted by the laser is not blocked by the impeller on the fan;
  • the frequency modulator is further configured to frequency-modulate the wind measurement pulse signal and the optical signal to form a second optical pulse signal for transmission;
  • the signal processor is further configured to receive a return light signal returned by the second light pulse signal after being scattered by the aerosol in the atmosphere;
  • the signal processor is further configured to calculate and obtain a power spectrum of the back light signal
  • the signal processor is further configured to obtain wind field information according to the power spectrum.
  • the signal processor is configured to obtain a wind speed and a wind direction in the wind field information based on the plurality of radial wind speeds;
  • v los is the radial wind speed of the optical signal
  • los 1,2,3 ... n
  • ⁇ is the wavelength of the optical signal
  • f peak is the peak point frequency in the power spectrum
  • f 0 Is the modulation frequency
  • the signal processor is configured to calculate a signal-to-noise ratio of the return light signal received at the current moment
  • the signal processor is configured to control the pulse when a signal-to-noise ratio of the light-back signal received at the current time is lower than a signal-to-noise ratio of the light-back signal received by the signal processor before the current time.
  • the generator switches a pulse signal from the wind measurement pulse signal to the range measurement pulse signal transmission.
  • the present disclosure includes the following beneficial effects:
  • An embodiment of the present disclosure provides a method for acquiring attitude information of an impeller and a cabin-type lidar.
  • the method uses the signal processor to control the pulse when it is detected that an optical signal emitted by the laser is blocked by an impeller on the fan.
  • the generator transmits a ranging pulse signal, and the frequency modulator then modulates the ranging pulse signal and the optical signal to form a first optical pulse signal for transmission, and the signal processor receives the first optical pulse signal.
  • the reflected signal returned after the impeller reflects, the signal processor calculates a distance between the cabin-type lidar and the impeller according to a preset number of sampling points of the reflected signal, and the signal processor is based on the
  • the attitude information of the impeller is acquired by distance.
  • the attitude information of the impeller can be measured by the cabin-type laser radar, so that the attitude information of the impeller can be monitored in real time, and effective data is provided for achieving the maximum power generation efficiency.
  • FIG. 1 is a schematic installation diagram of a cabin-type lidar provided by an embodiment of the present disclosure
  • FIG. 2 is a structural block diagram of a cabin-type laser radar according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of obtaining a distance between a cabin-type lidar and an impeller according to an embodiment of the present disclosure
  • FIG. 4 is a schematic diagram of obtaining a pitch angle of an impeller according to an embodiment of the present disclosure
  • FIG. 5 is a schematic diagram of dividing a distance gate of an echo signal according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of performing noise cancellation on a back light signal according to an embodiment of the present disclosure
  • FIG. 7 is a schematic diagram of a pulse signal using two pulse widths according to an embodiment of the present disclosure.
  • FIG. 8 is a flowchart of a method for acquiring impeller attitude information according to an embodiment of the present disclosure.
  • Icons 100-cabin-type lidar; 110-laser; 120-frequency modulator; 130-pulse generator; 140-signal processor.
  • FIG. 1 is a schematic diagram of a cabin-type lidar 100 installation according to an embodiment of the present disclosure.
  • FIG. 2 is a structural block diagram of a cabin-type lidar 100 according to an embodiment of the present disclosure.
  • the cabin-type lidar 100 is mounted on a fan.
  • the cabin-type lidar 100 includes a laser 110, a frequency modulator 120, a pulse generator 130, and a signal processor 140.
  • the laser 110 is connected to the frequency modulator 120.
  • the frequency modulator 120 is connected to the pulse generator 130, and the signal processor 140 is connected to the pulse generator 130.
  • the laser 110 is configured to emit an optical signal, and the optical signal is a monochromatic optical signal.
  • the signal processor 140 is configured to control the pulse generator 130 to transmit a ranging pulse signal when it is detected that the optical signal emitted by the laser 110 is blocked by an impeller on the fan.
  • the pulse generator 130 is configured to transmit a ranging pulse signal, and the ranging pulse signal and the optical signal are both input to the frequency modulator 120, and the frequency modulator 120 is configured to combine the ranging pulse signal with the After the optical signal is frequency-modulated, a first optical pulse signal is formed and transmitted.
  • the pulse generator 130 is configured to generate a frequency-modulated signal with a certain pulse width, that is, a ranging pulse signal. Assuming that the carrier frequency is f 0 , that is, the frequency of the ranging pulse signal is f 0 , if the pulse width of the ranging pulse signal is ⁇ 2 , The period of the ranging pulse signal is T, then the ranging pulse signal is:
  • the frequency modulator 120 can Frequency modulation is performed by modulating the optical signal and the ranging pulse signal to form a first optical pulse signal for transmission.
  • an acoustic-optical modulator (AOM) can be used to modulate the optical signal.
  • the signal processor 140 is further configured to receive a reflection signal returned after the first light pulse signal is reflected by the impeller.
  • the signal processor 140 is further configured to calculate a distance between the cabin-type lidar 100 and the impeller according to a preset number of sampling points of the reflected signal, and the signal processor 140 is further configured to obtain the distance according to the distance. Posture information of the impeller.
  • the signal processor 140 receives the reflected signal, samples the reflected signal to obtain a preset number of sampling points, and obtains a distance between the cabin-type lidar 100 and the impeller according to the preset number of sampling points.
  • the sampling time is known, then the speed is multiplied by the sampling time to obtain the distance between the cabin-type lidar 100 and the impeller.
  • the impeller can also be pitched, and because the impeller has a certain thickness, the distance between the impeller and the nacelle lidar 100 will change accordingly as the impeller is pitched.
  • the signal processor 140 can obtain the attitude information of the impeller according to the distance, for example, what kind of pitch angle the impeller is in within a certain distance range, thereby obtaining the attitude information of the impeller, That is, the pitch angle of the impeller is the attitude information of the impeller.
  • the main control device on the fan can control the attitude of the impeller in combination with the wind direction information, thereby improving the power generation efficiency or reducing the fan load.
  • the distance between the impeller and the nacelle lidar 100 can be obtained to obtain the attitude information of the impeller according to the distance, so that the attitude change of the impeller can be monitored in real time, which provides effective for the fan to achieve the maximum power generation efficiency. data.
  • the signal processor 140 calculates a distance between the cabin-type lidar 100 and the impeller according to a preset number of sampling points of the reflected signal, including: The distance between the cabin-type lidar 100 and the impeller is obtained.
  • R is the distance between the cabin-type lidar 100 and the impeller
  • the POS 1 -POS 0 are the preset sampling points of the reflected signal
  • c is the speed of light in a vacuum
  • F s is the A sampling frequency at which the first light pulse signal is sampled.
  • the signal processor 140 may obtain a pitch angle of the impeller according to the distance, and the pitch angle of the impeller is attitude information of the impeller.
  • the manner in which the signal processor 140 obtains the pitch angle of the impeller according to the distance may be that the signal processor 140 obtains the horizontal change distance and the vertical change distance of the impeller within a preset time interval according to the distance, and then The signal processor 140 obtains a pitch angle of the impeller according to the horizontal change distance and the vertical change distance.
  • the signal processor 140 is based on Obtain the pitch angle of the impeller.
  • the pulse generator 130 can send two pulse widths different
  • the pulse signal includes the above-mentioned ranging pulse signal and wind measurement pulse signal, and the pulse generator 130 implements the switching of the pulse signal according to the signal-to-noise ratio of the signal obtained by the signal processor 140.
  • the cabin laser radar 100 The wind field pulse signal is used to measure the wind field information.
  • the pulse generator 130 can generate two kinds of pulse width frequency modulation signals, namely, a ranging pulse signal and a wind measuring pulse signal. Assuming that the carrier frequency is f 0 , the pulse width of the wind measuring pulse signal is ⁇ 1 , and the pulse of the ranging pulse signal is The width is ⁇ 2 ( ⁇ 2 ⁇ 1 ), and the period of the ranging pulse signal and the wind measuring pulse signal is T.
  • the two types of pulse signals are:
  • the signal processor 140 first controls when detecting that the optical signal emitted by the laser 110 is not blocked by the impeller on the fan.
  • the pulse generator 130 transmits a wind measurement pulse signal.
  • the frequency modulator 120 modulates the wind measurement pulse signal and the optical signal to form a second optical pulse signal for transmission.
  • the signal processor 140 receives the second optical pulse signal.
  • the light pulse signal is a return light signal after being scattered by the aerosol in the atmosphere, and then the signal processor 140 calculates and obtains a power spectrum of the return light signal, and the signal processor 140 obtains a wind field according to the power spectrum. information.
  • the signal processor 140 controls the pulse generator 130 to switch a pulse signal from the wind measurement pulse signal to the distance measurement pulse signal for transmission.
  • the signal processor 140 calculates the signal-to-noise ratio of the reflected signal received at the current moment, and when the signal-to-noise ratio of the reflected signal is lower than the When the signal-to-noise ratio of the reflected signal received by the signal processor 140 before the current time, the signal processor 140 controls the pulse generator 130 to switch the pulse signal from the ranging pulse signal to the wind measurement The pulse signal is transmitted.
  • the two types of pulse signals are switched at the falling edge of the signal-to-noise ratio.
  • the pulse signal currently transmitted by the pulse generator 130 is a ranging pulse signal
  • the next time that is, the current time
  • the signal processor 140 since the signal processor 140 receives a reduced effective signal amplitude, the signal-to-noise ratio decreases at this time, indicating that the signal-to-noise ratio is at a falling edge at this time, and the signal processor 140
  • the pulse generator 130 is controlled to send a wind measurement pulse signal.
  • the signal-to-noise ratio calculated by the signal processor 140 is Wherein the value of the amplitude of the reflected signal A received signal processor 140, the noise amplitude A n-value.
  • the signal processor 140 first calculates the power spectrum of the received back light signal.
  • the calculation process is as follows: first, the distance gate is divided for the back light signal, and then the power spectrum calculation is performed for each distance door separately. Finally, after a certain period of pulse accumulation, the background noise is removed to obtain the signal power spectrum.
  • FIG. 5 is a schematic diagram of the range door division of the return signal. Since the cabin-type lidar 100 needs to measure the wind field information of multiple range doors at the same time, it is necessary to first calculate the starting point position based on the measured section distance, as shown in FIG. As described in 5, for the case where the section distance is R, the starting point position is:
  • c is the transmission rate of the optical signal
  • N is the number of sampling points included in each distance gate
  • F s is the sampling frequency
  • the power spectrum of the return light signal is calculated by using the periodic chart method.
  • the signal processor 140 calculates the power spectrum of the return light signal
  • the return light signal and the light signal must pass through the cabin laser radar 100.
  • the coupler performs beat frequency and sets the received light return signal as:
  • c is the speed of light in vacuum
  • ⁇ is the wavelength of the optical signal
  • f 0 is the frequency modulated by the frequency modulator 120
  • f d is the Doppler frequency of the aerosol backscatter signal in the atmosphere.
  • the beat frequency signal becomes:
  • the cabin-type laser radar 100 further includes a balance detector configured to implement the conversion of the photoelectric signal and suppress the common mode signal.
  • the cabin-type lidar 100 also includes an A / D converter.
  • the A / D converter is configured to convert analog signals to digital signals. In order to avoid spectral aliasing, the sampling rate needs to meet the Nyquist sampling law. After the signal is sampled by the A / D converter, it can be expressed as:
  • the power spectral density of multiple periodic pulse signals needs to be averaged, and the final output power spectral density is:
  • M is the pulse accumulation number.
  • the obtained power spectrum contains relatively fixed background noise, so background noise removal is required.
  • the received laser energy decreases with increasing distance, the longest distance The aerosol return light will be completely submerged in the background noise. Therefore, the farthest door power spectrum is selected as the background noise.
  • the signal-to-noise ratio calculated by the signal processor 140 for:
  • the signal processor 140 can control the switching of the pulse signals transmitted by the pulse generator 130 by calculating the signal-to-noise ratio under the two types of pulse signals.
  • the pulse signal transmitted by the pulse generator may include two types of pulse widths. As shown in FIG. 7, after the pulse generator 130 has transmitted the pulse width ⁇ 1 Signal, the signal is immediately switched to a signal with a pulse width ⁇ 2 and processed separately after receiving the signal.
  • the wind speed and wind direction are obtained in the wind field information.
  • v los is the radial wind speed of the optical signal
  • los 1,2,3 ... n
  • ⁇ is the wavelength of the optical signal
  • f peak is the peak point frequency in the power spectrum
  • f 0 Is the modulation frequency
  • the cabin-type lidar 100 may further include a circulator, an optical switch, and multiple optical antennas.
  • the circulator is connected to the frequency modulator 120 and the optical switch, respectively. Multiple optical antennas are connected.
  • the optical switch can be a 1 * 4 optical switch, which can be switched between 1, 2, 3, and 4 at a fixed frequency to realize the transmission and reception of lasers at four positions in the space.
  • the circulator is configured to isolate the transmitting and receiving signals. When the pulse signal is transmitted outward, only the output port can pass the optical signal with almost no loss, thereby suppressing the intensity of the reflected signal from the optical antenna of the receiving branch.
  • the optical antenna which is a telescope, is configured to improve the efficiency of receiving and emitting signals.
  • the transmission distance of the optical signal can be maximized by adjusting the telescope's focal length.
  • the telescope can collect scattered light in different directions and converge into parallel light. Thereby improving reception efficiency.
  • FIG. 8 is a flowchart of a method for acquiring an impeller attitude information according to an embodiment of the present disclosure. The method is applied to the above-mentioned cabin-type laser radar 100. The method includes the following steps:
  • Step S110 When it is detected that the optical signal emitted by the laser 110 is blocked by the impeller on the fan, the signal processor 140 controls the pulse generator 130 to transmit a ranging pulse signal.
  • Step S120 The frequency modulator 120 modulates the ranging pulse signal and the optical signal to form a first optical pulse signal for transmission.
  • Step S130 The signal processor 140 receives a reflection signal that is returned after the first light pulse signal is reflected by the impeller.
  • Step S140 The signal processor 140 calculates a distance between the cabin-type lidar 100 and the impeller according to a preset number of sampling points of the reflected signal.
  • Step S150 The signal processor 140 acquires attitude information of the impeller according to the distance.
  • the signal processor 140 calculates a distance between the cabin-type lidar 100 and the impeller according to a preset number of sampling points of the reflected signal, including:
  • the signal processor 140 is based on Obtaining the distance between the cabin-type lidar 100 and the impeller;
  • R is the distance between the cabin-type lidar 100 and the impeller
  • the POS 1 -POS 0 are the preset sampling points of the reflected signal
  • c is the speed of light in a vacuum
  • F s is the A sampling frequency at which the first light pulse signal is sampled.
  • the acquiring, by the signal processor 140, attitude information of the impeller according to the distance includes:
  • the signal processor 140 obtains a pitch angle of the impeller according to the distance, and the pitch angle of the impeller is attitude information of the impeller.
  • the signal processor 140 obtaining the pitch angle of the impeller according to the distance includes:
  • the signal processor 140 obtains a pitch angle of the impeller according to the horizontal change distance and the vertical change distance.
  • the signal processor 140 obtains the pitch angle of the impeller according to the horizontal change distance and the vertical change distance.
  • the signal processor 140 includes: Obtain the pitch angle of the impeller.
  • the method further includes:
  • the signal processor 140 controls the pulse generator 130 to transmit a wind measurement pulse signal
  • the frequency modulator 120 frequency-modulates the wind measurement pulse signal and the optical signal to form a second optical pulse signal for transmission;
  • the signal processor 140 receives a return light signal returned by the second light pulse signal after being scattered by aerosol in the atmosphere;
  • the signal processor 140 calculates and obtains a power spectrum of the back light signal
  • the signal processor 140 obtains wind field information according to the power spectrum.
  • the obtaining, by the signal processor 140 according to the power spectrum, wind field information includes:
  • the signal processor 140 obtains a wind speed and a wind direction in the wind field information based on the multiple radial wind speeds;
  • v los is the radial wind speed of the optical signal
  • los 1,2,3 ... n
  • ⁇ is the wavelength of the optical signal
  • f peak is the peak point frequency in the power spectrum
  • f 0 Is the modulation frequency
  • the signal processor 140 controls the pulse generator 130 to transmit a ranging pulse signal, including:
  • the signal processor 140 calculates a signal-to-noise ratio of the return light signal received at the current moment
  • the signal processor 140 controls the pulse generation
  • the transmitter 130 switches a pulse signal from the wind measurement pulse signal to the distance measurement pulse signal for transmission.
  • the embodiments of the present disclosure provide a method for acquiring attitude information of an impeller and a cabin-type laser radar 100.
  • the signal processor 140 controls the pulse generator 130 to transmit a ranging pulse signal, and then the frequency modulator 120 modulates the ranging pulse signal and the optical signal to form a first optical pulse signal for transmission.
  • the processor 140 receives a reflected signal returned after the first light pulse signal is reflected by the impeller, and the signal processor 140 calculates the cabin-type lidar 100 and the impeller according to a preset number of sampling points of the reflected signal Distance between the signal processor 140 and the attitude information of the impeller according to the distance.
  • the attitude information of the impeller can be measured by the cabin-type laser radar 100, so that the attitude information of the impeller can be monitored in real time, and effective data is provided for maximizing the power generation efficiency.
  • the disclosure can monitor the attitude information of the impeller in real time, and provide effective data for achieving maximum power generation efficiency and fan load control.

Abstract

L'invention concerne un procédé d'obtention d'informations de posture de roue et un radar laser de type à nacelle (100). Quand il est détecté qu'un signal lumineux émis en provenance d'un laser (110) est protégé par une roue sur un ventilateur, un processeur de signaux (140) commande un générateur d'impulsions (130) pour émettre un signal d'impulsion de télémétrie (S110) ; puis un modulateur de fréquence (120) module le signal d'impulsion de télémétrie et le signal lumineux pour former un premier signal d'impulsion lumineuse et l'émettre (S120) ; le processeur de signaux (140) reçoit un signal de réflexion renvoyé par la roue après que la roue réfléchit le premier signal d'impulsion lumineuse (S130) ; le processeur de signaux (140) calcule une distance entre le radar laser de type à nacelle (100) et la roue en fonction du nombre prédéfini de points d'échantillonnage du signal de réflexion (S140) ; le processeur de signaux (140) obtient les informations de posture de la roue en fonction de la distance (S150). Les informations de posture de la roue sont obtenues au moyen du radar laser de type à nacelle (100), de telle sorte que les informations de posture de la roue peuvent être surveillées en temps réel, et des données valides sont fournies de façon à maximaliser l'efficacité de génération d'énergie.
PCT/CN2018/105151 2018-09-12 2018-09-12 Procédé d'obtention d'informations de posture de roue et radar laser de type à nacelle WO2020051785A1 (fr)

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Cited By (1)

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Publication number Priority date Publication date Assignee Title
CN111289993A (zh) * 2020-03-27 2020-06-16 北京雷瑟瑞达科技有限公司 一种用于脉冲飞行时间法激光雷达抗互相干扰的系统及方法

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