CN112832958B - Fan tower inclination monitoring device and method based on light dispersion - Google Patents
Fan tower inclination monitoring device and method based on light dispersion Download PDFInfo
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
- G01C15/002—Active optical surveying means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C5/00—Measuring height; Measuring distances transverse to line of sight; Levelling between separated points; Surveyors' levels
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses a device and a method for monitoring the inclination of a fan tower barrel based on light dispersion, and belongs to the technical field of new energy power generation. The system comprises a light source generator, a beam splitter, a spectrum signal receiver and a data processing and analyzing system; the spectral signal receiver is fixedly arranged on the tower, the light source generator is opposite to the spectral signal receiver and is fixedly arranged on the horizontal plane outside the fan tower, the beam splitter is arranged between the light source generator and the spectral signal receiver, and the spectral signal receiver is connected with the data processing and analyzing system. The invention realizes the detection of the wind turbine tower by using the optical measurement method, has higher measurement precision compared with other modes, has simple construction, lower cost of each part and easy realization, and improves the safety of the wind turbine tower in the wind power plant.
Description
Technical Field
The invention belongs to the technical field of new energy power generation, and particularly relates to a device and a method for monitoring inclination of a fan tower barrel based on light dispersion.
Background
As wind power development progresses to low wind speed areas, ultra-high compliant towers are being used in a large number of applications. Meanwhile, the wind turbine generator is closer to a residential area, and the safety requirement on the wind turbine generator is higher.
In recent years, the wind turbine tower-reversing accident frequently occurs, and severe negative social influence can be generated while huge economic loss is brought to wind power enterprises. From the source of the inverted tower of the fan, foundation cracking, tower cylinder inclination, uneven settlement and the like are critical reasons; these safety hazards are a lengthy and slow-changing process, especially the tilting and uneven settling of the tower, which is difficult to find accurately by human eye observation, and once the quantity changes to a variable, the tower-turning accident is unavoidable. In addition, the uneven settlement not only can reduce the generated energy of the wind turbine generator, but also can generate additional bending moment for large components (such as a main bearing) of the transmission chain, so that the transmission chain can run under an off-design working condition and the components are damaged. Therefore, monitoring and measuring the inclination of the tower and uneven settlement are effective in time and are main solutions for avoiding the fan from falling down the tower.
The existing device for monitoring the inclination of the fan mainly adopts an inclination sensor, however, the method also has certain defects, and the requirements on the accuracy and the long-term stability of the sensor are high. In recent years, image recognition technology has been applied to the field of fan tower monitoring. The patent with publication number 211314461U reports a novel wind power tower inclination early warning device, monitors a screw through the arrangement of a high-low temperature digital industrial camera and a shadowless high-brightness light source, and is matched with an on-line monitoring device screen arranged in a main control room, so that the wind power tower inclination early warning device can be provided with a visual display interface. The patent publication 104807444a reports a method for measuring the inclination of a tower of a fan, so that a user can quickly determine the inclination angle of the tower by taking pictures only twice. However, one disadvantage of using image recognition technology to determine the tower inclination is that the requirement on the resolution of the image is high, and the tiny displacement of the fan tower in the early stage is difficult to be reflected obviously by the image.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a device and a method for monitoring the inclination of a fan tower based on light dispersion, which can improve the accuracy and the sensitivity of monitoring the fan tower and the safety of the fan tower.
The invention is realized by the following technical scheme:
the invention discloses a fan tower inclination monitoring device based on light dispersion, which comprises a light source generator, a light splitter, a spectrum signal receiver and a data processing and analyzing system, wherein the light splitter is arranged on the light source generator;
the spectrum signal receiver is fixedly arranged on the fan tower, the light source generator is opposite to the spectrum signal receiver and is fixedly arranged on a horizontal plane outside the fan tower, the light splitter is arranged between the light source generator and the spectrum signal receiver, and the spectrum signal receiver is connected with the data processing and analyzing system; the mixed light beam emitted by the light source generator is separated into monochromatic light beams with different wavelengths by the light splitter and irradiates the spectrum signal receiver.
Preferably, the beam splitter is a triangular prism or a grating, the resolution of the beam splitter being > 1nm/mm.
Preferably, the spectral signal receiver is a spectral signal probe.
Further preferably, the diameter of the spectroscopic signal probe is < 1mm.
Preferably, the height of the spectral signal receiver from the ground is 10-20 cm.
Preferably, the signal refresh frequency of the spectrum signal receiver is 0.1-10Hz.
Preferably, the light source generator is a unidirectional light beam generator.
Preferably, the light source generator and the light splitter are arranged in the sealed shell, the light outlet on the sealed shell of the light source generator is made of a light-transmitting material, and the light inlet and the light outlet on the sealed shell of the light splitter are made of a light-transmitting material.
The invention discloses a method for measuring the inclination of a fan tower by adopting the fan tower inclination monitoring device based on light dispersion, which comprises the following steps:
measuring wavelength signals of monochromatic light beams received at different heights in a vertical plane where the spectrum signal receiver is positioned, establishing a corresponding relation between a spatial vertical position and the wavelength signals received by the spectrum signal receiver corresponding to the spatial vertical position, and completing calibration;
the light source generator continuously emits mixed light beams, the mixed light beams are separated into monochromatic light beams with different wavelengths through the light splitter and irradiate on the spectrum signal receiver, the spectrum signal receiver receives wavelength signals at a preset refreshing frequency, the data processing and analyzing system analyzes and compares the wavelength signals received at a preset interval time, and an alarm signal is emitted when the change value is larger than a set alarm threshold value.
Preferably, a set of fan tower inclination monitoring devices based on light dispersion are respectively arranged in the same-height orthogonal direction of the fan tower, and the data processing and analyzing system respectively reads wavelength signals received by each spectrum signal receiver to calculate the differential settlement values of the fan tower in different directions; and calculating the inclination angle of the fan tower through the wavelength signals received by the two spectrum signal receivers opposite to each other in the same direction.
Compared with the prior art, the invention has the following beneficial technical effects:
according to the light dispersion-based fan tower inclination monitoring device disclosed by the invention, a beam of light sources with known wavelength distribution are separated into monochromatic lights with different wavelengths from top to bottom in space height by utilizing the light splitter, the monochromatic light information at a specific height position is obtained through the spectrum signal receiver arranged at the bottom of the fan tower, and the position information of the fan tower can be calculated and analyzed through the height-wavelength corresponding relation. When the fan tower is displaced, the wavelength signal received by the spectrum signal receiver is changed, and the change of the wavelength signal received by the spectrum signal receiver can reflect the change of the space position and the inclination angle of the fan tower. The device has the advantages that the detection of the fan tower barrel is realized by utilizing the optical measurement method, higher measurement precision is realized compared with other modes, the device is simple to construct, the cost of each part is lower, the implementation is easy, and the safety of the fan tower barrel in the wind power plant is improved.
Furthermore, the beam splitter adopts a triple prism or a grating, so that a beam of synthesized light can be decomposed into monochromatic light with different wavelengths according to different refraction and diffraction characteristics of light with different wavelengths, the cost is low, and the control is convenient; the resolution of the beam splitter is more than 1nm/mm, and higher measurement accuracy can be obtained.
Furthermore, the spectrum signal receiver adopts a spectrum signal probe, so that the response speed is high and the sensitivity is high.
Furthermore, the diameter of the spectrum signal probe is smaller than 1mm, and the resolution of the optical splitter can be matched to achieve higher measurement accuracy.
Further, the height of the spectrum signal receiver from the ground is 10-20 cm, so that uncertainty interference caused by an external environment close to the ground can be avoided, and measurement accuracy is improved.
Further, the signal refreshing frequency of the spectrum signal receiver is 0.1-10Hz, so that the monitoring continuity and timeliness can be ensured, and the energy consumption of the system can be reduced.
Further, the light source generator is a unidirectional light beam generator, so that the light has good gathering property, concentrated energy and convenient propagation.
Further, the light source generator and the beam splitter are arranged in the sealed shell, so that interference of surrounding light can be avoided to the greatest extent.
The method for measuring the inclination of the fan tower barrel by adopting the light dispersion-based fan tower barrel inclination monitoring device disclosed by the invention can effectively improve the accuracy and sensitivity of monitoring the fan tower barrel, improves the safety of the fan tower barrel and has good application prospect.
Further, a plurality of devices are arranged in the orthogonal direction at the bottom of the tower barrel of the fan, so that multidirectional real-time monitoring of the inclination and the settlement of the tower barrel can be realized, and a sufficient data basis is provided for observation and research.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the position change of the spectral signal receiver when the fan tower is tilted;
FIG. 3 is a schematic diagram of the change of the spectrum signal received by the spectrum signal receiver before and after the fan tower is inclined;
FIG. 4 is a schematic flow chart of the method of the present invention;
FIG. 5 is a schematic view of a plurality of monitoring devices mounted in a direction orthogonal to the bottom of a fan tower.
In the figure: the system comprises a 1-fan tower, a 2-light source, a 3-mixed light beam, a 4-beam splitter, a 5-monochromatic light beam, a 6-spectrum signal receiver and a 7-data processing and analyzing system.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings and specific examples, which are given by way of illustration of the invention and not by way of limitation:
the invention relates to a fan tower inclination monitoring device based on light dispersion, which comprises a light source generator 2, a light splitter 4, a spectrum signal receiver 6 and a data processing and analyzing system 7.
The spectrum signal receiver 6 is fixedly arranged on the fan tower 1, the light source generator 2 is opposite to the spectrum signal receiver 6 and is fixedly arranged on a horizontal plane outside the fan tower 1, and the height of the spectrum signal receiver 6 from the ground is preferably 10-20 cm. The beam splitter 4 is arranged between the light source generator 2 and the spectrum signal receiver 6, and the spectrum signal receiver 6 is connected with the data processing and analyzing system 7; the mixed light beam 3 emitted from the light source generator 2 is split into monochromatic light beams 5 of different wavelengths by the beam splitter 4 and irradiated on the spectrum signal receiver 6.
Preferably, the light source generator 2 and the beam splitter 4 are arranged in a sealed shell, the light outlet on the sealed shell of the light source generator 2 is made of a light-transmitting material, and the light inlet and the light outlet on the sealed shell of the beam splitter 4 are made of a light-transmitting material.
The beam splitter 4 may employ a triangular prism or a grating with a resolution of > 1nm/mm.
The spectrum signal receiver 6 can adopt a spectrum signal probe, and the diameter of the spectrum signal probe is less than 1mm; the signal refresh frequency of the spectrum signal receiver 6 may be set to 0.1 to 10Hz.
The light source generator is preferably a unidirectional light beam generator.
The method for measuring the inclination of the fan tower barrel by adopting the fan tower barrel inclination monitoring device based on light dispersion comprises the following steps:
in the vertical plane where the spectrum signal receiver 6 is positioned, measuring the wavelength signals of the monochromatic light beams 5 received at different heights, establishing the corresponding relation between the spatial vertical position and the wavelength signals received by the spectrum signal receiver 6 corresponding to the spatial vertical position, and completing calibration; the light source generator 2 continuously emits a mixed light beam 3, the mixed light beam 3 is separated into monochromatic light beams 5 with different wavelengths by the beam splitter 4 to irradiate on the spectrum signal receiver 6, the spectrum signal receiver 6 receives wavelength signals at a preset refreshing frequency, the data processing and analyzing system 7 analyzes and compares the wavelength signals received at preset interval time, and an alarm signal is emitted when the change value is larger than a set alarm threshold value.
In a preferred embodiment of the invention, a set of fan tower inclination monitoring devices based on light dispersion are respectively arranged in the orthogonal direction of the same height of the fan tower 1, and the data processing and analyzing system 7 respectively reads the wavelength signals received by each spectrum signal receiver 6 to calculate the uneven sedimentation values of the fan tower 1 in different directions; the inclination angle of the fan tower 1 is calculated by the wavelength signals received by the two spectrum signal receivers 6 which are opposite in the same direction.
The theoretical basis of the invention is as follows:
the light emitted by the standard light source or natural light is generated by superposing a plurality of wavelengths of light, and the beam splitter 4 (such as a prism, a grating and the like) can decompose a beam of synthesized light into monochromatic light with different wavelengths by utilizing the refraction and diffraction characteristics of the light with different wavelengths. By utilizing the characteristic, the fan tower inclination measuring device can be designed and realized. Specifically, a light source 2 with a known wavelength distribution is split into monochromatic light with different wavelengths by a beam splitter 4, which sequentially presents different wavelengths from top to bottom in space, i.e. presents different colors from the naked eye. And a spectrum signal receiver 6, such as a spectrum signal probe, is arranged at a corresponding position of the bottom of the fan tower 1 at a certain height from the ground to receive light rays at a specific position. For a specific wavelength, the height of the light source 2 is fixed, the relative position between the light source 2 and the beam splitter 4 is fixed, the distance between the beam splitter 4 and the fan tower 1 is fixed, and then the spectrum signal received by the spectrum signal receiver 6 installed on the fan tower 1 is only related to the position of the spectrum signal receiver 6. Once the fan tower 1 tilts or settles, the position of the spectrum signal receiver 6 fixed on the wall surface of the fan tower 1 correspondingly moves, and the signal of the received light correspondingly changes. Before the measurement is formally installed, calibration is first performed. In the vertical plane in which the spectral signal receiver 6 is located, the wavelength signals of the monochromatic light beams 5 received at different heights (precision: mm) are measured, and a correspondence between the spatial vertical position and the wavelength information received by the spectral signal receiver 6 corresponding to the position is established. The inclination and sedimentation information of the fan tower 1 is obtained through the light signal information captured by the spectrum signal receiver 6.
In practice, the spatial resolution of the signal is controlled by adjusting the configuration (base angle, etc.) of the beam splitter 4, e.g. a triangular prism, and the distance of the beam splitter 4 from the spectral signal receiver 6. In general, to obtain a high measurement accuracy, the spatial resolution of the monochromatic light passing through the beam splitter 4 should be higher than 1nm/mm. The diameter of the receiving probe of the spectrum signal receiver 6 arranged on the fan tower 1 is matched with the spatial resolution of the monochromatic light beam, and the diameter is not more than 1mm. The installation of the spectrum signal receiver 6 on the fan tower 1 is 10 cm to 20cm away from the ground, so that the uncertainty interference caused by the external environment near the ground is avoided. The position of the light source 2 should be matched with the position of the spectrum signal receiver 6, so that the spectrum signal receiver 6 can receive the light signal passing through the beam splitter 4 when the fan tower 1 tilts and settles.
The invention is further explained in the following by means of a specific example:
as shown in FIG. 1, a light source 2 of known intensity distribution is fixed at a distance h from ground 1 Where it is located. The emitted mixed light beam 3 is separated into monochromatic light beams 5 of different wavelengths in a vertical spatial scale by a beam splitter 4. Adjusting the distance l of the light source 2 to the beam splitter 4 1 And the distance l between the beam splitter 4 and the spectral signal receiver 6 on the wall surface of the fan tower 1 2 The spatial resolution of the monochromatic light beam 5 after passing through the beam splitter 4 in the vertical direction at the measurement point is made not less than 1nm/mm to ensure the accuracy of measurement. By the calibration in advance, the correspondence between the wavelength distribution of the monochromatic light beam 5 and the spatial height in the vertical height direction is determined. The bottom of the fan tower 1 is away from the ground h 2 The spectral signal receiver 6 is arranged at the position of 10 cm to 20cm. It should be noted that h is as described above 1 Should be equal to h 2 Cooperate such that the spectral signal receiver 6 is within the coverage of the monochromatic light beam 5. The signals received by the spectrum signal receiver 6 are transmitted back to the data processing and analyzing system 7, and the wavelength information received by the spectrum signal receiver 6 at the moment, namely the position information of the fan tower 1 at the moment, can be obtained through data analysis.
When the fan tower 1 is inclined or unevenly settled in a certain direction, as shown in fig. 2, when the fan tower 1 is inclined at an angle β, the position of the spectrum signal receiver 6 mounted on the wall surface of the fan tower 1 is changed accordingly. Due to the variation of the position of the spectral signal receiver 6 in the height direction, the monochromatic light signal received by it will also vary. Illustratively, fig. 3 shows the spectral signals received by the spectral signal receiver 6 before and after tilting of the wind turbine tower 1. Excluding background light (from the surrounding environment), the spectral image scanned by the spectral signal receiver 6 receives a wavelength lambda at it 1 An obvious peak value is generated, the height position of the spectrum signal receiver 6 is changed along with the inclination of the fan tower 1, the wavelength of the monochromatic light received by the spectrum signal receiver is changed, and the peak value of the wavelength in the spectrum is shifted to the wavelengthλ 2 Where it is located. And determining the displacement change delta h of the fan tower 1 at the vertical height according to the corresponding relation between the height and the wavelength which are calibrated in advance. The displacement Δh=d×sin β of the spectrum signal receiver 6 in the height direction, D being the bottom diameter of the fan tower 1. It is believed that the angle β is small when the fan tower 1 is initially tilted, and thus Δh≡d×β. Therefore, the inclination angle of the fan tower 1 at this time can be calculated by the displacement back.
According to practical situations, the refresh frequency of the spectrum signal receiver 6 can be set to be in the interval of 0.1-10Hz. Taking a refreshing frequency of 1Hz as an example, the light source 2 continuously emits a mixed light beam 3, the spectrum signal receiver 6 collects the received wavelength information every 1 second and automatically processes the wavelength information by using a computer, and deduces the position information of the fan tower 1 at the moment. And carrying out difference comparison on the information collected in the interval time period to obtain the change information of the position of the fan tower 1. When the position change of the fan tower 1 is abnormal or exceeds a set safety threshold value, the computer pops up an alarm window. The specific operation flow is shown in fig. 4.
In order to obtain the inclination and sedimentation information of the fan tower 1 in different directions, four sets of fan tower inclination measuring devices are arranged at the same height and orthogonalization position of the bottom of the fan tower 1, as shown in fig. 5, so as to realize real-time monitoring of the inclination and sedimentation of the fan tower 1 in different directions. When it is noted that the differential settlement of the fan tower 1 in different directions can be obtained by respectively reading the light intensity information on each set of measuring device and deducing through the corresponding relation, but the inclination angle of the fan tower 1 needs to be calculated through the signal superposition of the two opposite spectrum signal receivers 6. For example, for two spectral signal receivers 6 arranged opposite (i.e. 180 ° in central angle) on the wall of the fan tower 1, if one of the fan towers 1 is settled to Δh as measured by the wavelength-height correspondence 1 The fan tower 1 measured by the other spectrum signal receiver 6 is settled to delta h 2 The relative height deviation Δh= |Δh between the two spectral signal receivers 6 1 -Δh 2 Calculation of the inclination angle at this time β≡ |Δh 1 -Δh 2 |/D。
It is to be understood that the foregoing description is only a part of the embodiments of the present invention, and that the equivalent changes of the system described according to the present invention are included in the protection scope of the present invention. Those skilled in the art can substitute the described specific examples in a similar way without departing from the structure of the invention or exceeding the scope of the invention as defined by the claims, all falling within the scope of protection of the invention.
Claims (9)
1. The method for measuring the inclination of the fan tower based on the light dispersion fan tower inclination monitoring device is characterized by comprising a light source generator (2), a light splitter (4), a spectrum signal receiver (6) and a data processing and analyzing system (7);
the spectrum signal receiver (6) is fixedly arranged on the fan tower (1), the light source generator (2) is opposite to the spectrum signal receiver (6) and is fixedly arranged on a horizontal plane outside the fan tower (1), the light splitter (4) is arranged between the light source generator (2) and the spectrum signal receiver (6), and the spectrum signal receiver (6) is connected with the data processing and analyzing system (7); the mixed light beam (3) emitted by the light source generator (2) is separated into monochromatic light beams (5) with different wavelengths through the beam splitter (4) to be irradiated on the spectrum signal receiver (6);
the method comprises the following steps:
in the vertical plane where the spectrum signal receiver (6) is positioned, measuring wavelength signals of monochromatic light beams (5) received at different heights, establishing a corresponding relation between a spatial vertical position and the wavelength signals received by the spectrum signal receiver (6) corresponding to the spatial vertical position, and completing calibration;
the light source generator (2) continuously emits a mixed light beam (3), the mixed light beam (3) is separated into monochromatic light beams (5) with different wavelengths through the light splitter (4) to irradiate on the spectrum signal receiver (6), the spectrum signal receiver (6) receives wavelength signals at a preset refreshing frequency, the data processing and analyzing system (7) analyzes and compares the wavelength signals received at a preset interval time, and an alarm signal is emitted when the change value is larger than a set alarm threshold value.
2. The method for measuring the inclination of the fan tower based on the light dispersion fan tower inclination monitoring device according to claim 1, wherein the light splitter (4) is a triangular prism or a grating, and the resolution of the light splitter (4) is more than 1nm/mm.
3. The method for fan tower tilt measurement based on light dispersion of a fan tower tilt monitoring device according to claim 1, wherein the spectral signal receiver (6) is a spectral signal probe.
4. A method of fan tower tilt measurement based on light dispersion of a fan tower tilt monitoring device according to claim 3, wherein the diameter of the spectroscopic signal probe is < 1mm.
5. The method for fan tower inclination measurement based on light dispersion of the fan tower inclination monitoring device according to claim 1, wherein the height of the spectrum signal receiver (6) from the ground is 10-20 cm.
6. The method for fan tower inclination measurement based on light dispersion fan tower inclination monitoring device according to claim 1, characterized in that the signal refresh frequency of the spectrum signal receiver (6) is 0.1-10Hz.
7. The method for fan tower inclination measurement based on light dispersion of fan tower inclination monitoring device according to claim 1, wherein the light source generator (2) is a unidirectional light beam generator.
8. The method for measuring the inclination of the fan tower based on the light dispersion of the fan tower inclination monitoring device according to claim 1, wherein the light source generator (2) and the light splitter (4) are arranged in the sealed shell, the light outlet on the sealed shell of the light source generator (2) is made of a light-transmitting material, and the light inlet and the light outlet on the sealed shell of the light splitter (4) are made of a light-transmitting material.
9. The method for measuring the inclination of the fan tower according to the light dispersion-based fan tower inclination monitoring device of claim 1, wherein a set of the fan tower inclination monitoring device based on light dispersion is respectively arranged in the orthogonal direction of the same height of the fan tower (1), and a data processing and analyzing system (7) respectively reads wavelength signals received by each spectrum signal receiver (6) to calculate the uneven sedimentation values of the fan tower (1) in different directions; the inclination angle of the fan tower (1) is calculated through the wavelength signals received by the two spectrum signal receivers (6) which are opposite in the same direction.
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| CN202110192800.8A CN112832958B (en) | 2021-02-20 | 2021-02-20 | Fan tower inclination monitoring device and method based on light dispersion |
| PCT/CN2021/114650 WO2022174565A1 (en) | 2021-02-20 | 2021-08-26 | Fan tower barrel inclination monitoring device and method based on optical dispersion |
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| CN202110192800.8A CN112832958B (en) | 2021-02-20 | 2021-02-20 | Fan tower inclination monitoring device and method based on light dispersion |
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| CN112832958B true CN112832958B (en) | 2024-03-08 |
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| CN112832958B (en) * | 2021-02-20 | 2024-03-08 | 中国华能集团清洁能源技术研究院有限公司 | Fan tower inclination monitoring device and method based on light dispersion |
| CN113250916B (en) * | 2021-06-29 | 2022-08-30 | 中国华能集团清洁能源技术研究院有限公司 | Device and method for monitoring inclination of fan tower based on optical interference |
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