CN103900529A - Power transmission line inclined angle measurement device and method based on fiber bragg grating sensing technology - Google Patents
Power transmission line inclined angle measurement device and method based on fiber bragg grating sensing technology Download PDFInfo
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- CN103900529A CN103900529A CN201410075240.8A CN201410075240A CN103900529A CN 103900529 A CN103900529 A CN 103900529A CN 201410075240 A CN201410075240 A CN 201410075240A CN 103900529 A CN103900529 A CN 103900529A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C9/00—Measuring inclination, e.g. by clinometers, by levels
- G01C9/02—Details
- G01C9/06—Electric or photoelectric indication or reading means
- G01C2009/066—Electric or photoelectric indication or reading means optical
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Abstract
The invention discloses a power transmission line inclined angle measurement device and method based on a fiber bragg grating sensing technology. The device is characterized by comprising a data acquisition module, an optical signal receiving-transmitting and demodulating module and a data processing module, wherein the data acquisition module is used for acquiring temperature and strain change data of a power transmission line to be detected in real time; the data acquisition module comprises two fiber bragg grating strain sensors and a tripod; three edges of the tripod comprise an edge with the fixed length and two edges with the changeable lengths; each edge with the changeable length is provided with one fiber bragg grating strain sensor; the optical signal receiving-transmitting and demodulating module is used for transmitting narrow-band sweeping frequency light generated by a fiber bragg grating demodulator and demodulating a received optical signal; the data processing module is used for obtaining the temperature and strain change data of the power transmission line to be detected from a demodulated optical signal and calculating an inclined angle of the power transmission line to be detected.
Description
Technical field
The present invention relates to field of sensing technologies, be specifically related to power transmission line dip measuring device and method thereof based on fiber grating sensing technology.
Background technology
Traditional power transmission line measurement of dip angle technology is treated to basis with electronic information, be subject to active power supply, electromagnetic interference (EMI), signal remote transmission is unstable, data transmission capacity is limited etc. factor restricts measuring when power transmission line inclination angle, limited the safety and reliability of power transmission line measurement of dip angle.
Summary of the invention
The factors such as the power transmission line measurement of dip angle that technical matters to be solved by this invention is traditional is subject to active power supply, electromagnetic interference (EMI), signal remote transmission is unstable, data transmission capacity is limited restrict, and have limited the safety and reliability of power transmission line measurement of dip angle.
For this purpose, the present invention proposes the power transmission line dip measuring device based on fiber grating sensing technology, and this device comprises:
Data acquisition module, for temperature and the strain variation data of Real-time Collection power transmission line to be measured, described data acquisition module comprises two fiber Bragg grating strain sensors and a tripod, three limits of described tripod comprise limit and two adjustable length limits of a regular length, and a described fiber Bragg grating strain sensor is installed on every adjustable length limit;
Optical signal transceiver and demodulation module, for launching narrow-band frequency-sweeping light that described fiber Bragg grating (FBG) demodulator produces and by the light signal demodulation receiving to data acquisition module;
Data processing module, obtains temperature and the strain variation data of power transmission line to be measured for the light signal from demodulation, and calculates power transmission line to be measured inclination angle.
Wherein, described fiber Bragg grating strain sensor comprises temperature compensation grating and strain grating, and described temperature compensation grating is for the temperature cross sensitivity of compensate for strain grating.
Wherein, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection.
Wherein, described optical signal transceiver and demodulation module comprise optical signal transceiver unit and fiber Bragg grating (FBG) demodulator, and described optical signal transceiver unit is for launching the narrow-band frequency-sweeping light of described fiber Bragg grating (FBG) demodulator generation and the light signal of reception being transmitted into described fiber Bragg grating (FBG) demodulator to data acquisition module; Described fiber Bragg grating (FBG) demodulator is used for separating dim signal.
Wherein, the fiber Bragg grating strain sensor of described data acquisition module is connected by Optical Fiber composite overhead Ground Wire or OPPC with demodulation module with described optical signal transceiver.
Wherein, described data acquisition module further comprises two springs that stiffness factor is identical and known, a spring and a fiber Bragg grating strain sensor are installed in parallel on adjustable length limit of tripod, and another spring and another fiber Bragg grating strain sensor are installed in parallel on another adjustable length limit of tripod.
Wherein, described fiber Bragg grating strain sensor comprises fiber grating displacement sensor, and described fiber grating displacement sensor is used for gathering temperature, the strain variation data of power transmission line to be measured, and calculates the real-time displacement delta data on the adjustable length limit of tripod.
Wherein, described data processing module is specifically for obtaining temperature and the strain variation data of real-time power transmission line to be measured in the light signal from demodulation, determine the instantaneous value of the centre wavelength of fiber Bragg grating strain sensor, obtain the change in displacement on adjustable length limit according to the instantaneous value of described centre wavelength, calculate the real-time length of side on the adjustable length limit of tripod, and calculate power transmission line to be measured inclination angle by the cosine law.
Preferably, this device also comprises client modules, for electronic geographic demonstration, the monitoring of electrical network parameter, log query and help.
The method of carrying out measurement of dip angle based on said apparatus, the method comprises:
S1. by the temperature of data acquisition module Real-time Collection power transmission line to be measured and the data of STRESS VARIATION, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection;
S2. launch narrow-band frequency-sweeping light by optical signal transceiver and demodulation module to described data acquisition module;
S3. will reflex to optical signal transceiver and demodulation module with the narrow-band frequency-sweeping light of the identical wavelength of centre wavelength of fiber Bragg grating strain sensor;
S4. light signal optical signal transceiver and demodulation module being received carries out power detection, and described light signal is demodulated into the digital signal of Wavelength-encoding;
S5. according to the digital signal obtaining, therefrom obtain temperature and the STRESS VARIATION data of power transmission line to be measured and calculate the real-time displacement delta data on the adjustable length limit of tripod, according to the length on the adjustable length limit of change in displacement specified data processing module intermediate cam frame, calculate power transmission line to be measured inclination angle by the cosine law.
Than prior art, the beneficial effect of method provided by the invention is: fiber-optic grating sensor of the present invention has passive, anti-electromagnetic interference (EMI), precision is high, the little quality of volume light, disturb the features such as anticorrosive, and it can collect information sensing and be transmitted in all over the body, a sensor comprises two gratings, wavelength variations is done to poor processing, can effectively get rid of like this interference of fiber-optic grating sensor to strain and temperature cross sensitivity, get rid of the impact of temperature on strain, make result more accurate.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 shows the power transmission line dip measuring device structural drawing based on fiber grating sensing technology;
Fig. 2 shows the power transmission line dip measuring device of application based on fiber grating sensing technology carries out the method flow diagram of measurement of dip angle;
Fig. 3 shows the data acquisition module in embodiment 1;
Fig. 4 shows the data acquisition module in embodiment 2.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Power transmission line dip measuring device based on fiber grating sensing technology, as shown in Figure 1, this device comprises:
Data acquisition module, for temperature and the strain variation data of Real-time Collection power transmission line to be measured, described data acquisition module comprises two fiber Bragg grating strain sensors and a tripod, three limits of described tripod comprise limit and two adjustable length limits of a regular length, and a described fiber Bragg grating strain sensor is installed on every adjustable length limit;
Optical signal transceiver and demodulation module, for launching narrow-band frequency-sweeping light that described fiber Bragg grating (FBG) demodulator produces and by the light signal demodulation receiving to data acquisition module;
Data processing module, obtains temperature and the strain variation data of power transmission line to be measured for the light signal from demodulation, and calculates power transmission line to be measured inclination angle.
Wherein, described fiber Bragg grating strain sensor comprises temperature compensation grating and strain grating, and described temperature compensation grating is for the temperature cross sensitivity of compensate for strain grating.
Wherein, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection.
Wherein, described optical signal transceiver and demodulation module comprise optical signal transceiver unit and fiber Bragg grating (FBG) demodulator, and described optical signal transceiver unit is for launching the narrow-band frequency-sweeping light of described fiber Bragg grating (FBG) demodulator generation and the light signal of reception being transmitted into described fiber Bragg grating (FBG) demodulator to data acquisition module; Described fiber Bragg grating (FBG) demodulator is used for separating dim signal.
Wherein, the fiber Bragg grating strain sensor of described data acquisition module is connected by Optical Fiber composite overhead Ground Wire or OPPC with demodulation module with described optical signal transceiver.
Wherein, described data acquisition module further comprises two springs that stiffness factor is identical and known, a spring and a fiber Bragg grating strain sensor are installed in parallel on adjustable length limit of tripod, and another spring and another fiber Bragg grating strain sensor are installed in parallel on another adjustable length limit of tripod.
Wherein, described fiber Bragg grating strain sensor comprises fiber grating displacement sensor, and described fiber grating displacement sensor is used for gathering temperature, the strain variation data of power transmission line to be measured, and calculates the real-time displacement delta data on the adjustable length limit of tripod.
Wherein, described data processing module is specifically for obtaining temperature and the strain variation data of real-time power transmission line to be measured in the light signal from demodulation, determine the instantaneous value of the centre wavelength of fiber Bragg grating strain sensor, obtain the change in displacement on adjustable length limit according to the instantaneous value of described centre wavelength, calculate the real-time length of side on the adjustable length limit of tripod, and calculate power transmission line to be measured inclination angle by the cosine law.
Preferably, this device also comprises client modules, for electronic geographic demonstration, the monitoring of electrical network parameter, log query and help.
Carry out the method for measurement of dip angle based on said apparatus, as shown in Figure 2, the method comprises:
S1. by the temperature of data acquisition module Real-time Collection power transmission line to be measured and the data of STRESS VARIATION, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection;
S2. launch narrow-band frequency-sweeping light by optical signal transceiver and demodulation module to described data acquisition module;
S3. will reflex to optical signal transceiver and demodulation module with the narrow-band frequency-sweeping light of the identical wavelength of centre wavelength of fiber Bragg grating strain sensor;
S4. light signal optical signal transceiver and demodulation module being received carries out power detection, and described light signal is demodulated into the digital signal of Wavelength-encoding;
S5. according to the digital signal obtaining, therefrom obtain temperature and the STRESS VARIATION data of power transmission line to be measured and calculate the real-time displacement delta data on the adjustable length limit of tripod, according to the length on the adjustable length limit of change in displacement specified data processing module intermediate cam frame, calculate power transmission line to be measured inclination angle by the cosine law.
Embodiment 1:
The present embodiment discloses a kind of power transmission line dip measuring device based on fiber grating sensing technology that is applied to measurement bay ceases to be busy ice covering thickness, and this device comprises:
Data acquisition module, for temperature and the strain variation data of Real-time Collection overhead transmission line to be measured, described data acquisition module comprises two fiber Bragg grating strain sensors, two spring and tripods that stiffness factor is identical and known, three limits of described tripod comprise limit and two adjustable length limits of a regular length, and a described fiber Bragg grating strain sensor is installed on every adjustable length limit; A spring and a fiber Bragg grating strain sensor are installed in parallel on an adjustable length limit of tripod, and another spring and another fiber Bragg grating strain sensor are installed in parallel on another adjustable length limit of tripod;
In the present embodiment, as shown in Figure 3, a sensor is fixed on pole line, and parallel with it, can synchronously respond to the strain of pole line; Parallel with pole line with the spring of this sensor parallel connection, can synchronously there is deformation, elongate or shorten; Insulator chain makes pole line and shaft tower for bracing frame ceases to be busy, ensures that circuit has reliable electric insulation intensity; In Fig. 3 intermediate cam frame, solid line is tripod and being connected and fixed bar of insulator chain; Described fixed bar and sensor spatially, without occuring simultaneously, are blocked by sensor.
Optical signal transceiver and demodulation module, described optical signal transceiver and demodulation module comprise optical signal transceiver unit and fiber Bragg grating (FBG) demodulator, and described optical signal transceiver unit is for launching the narrow-band frequency-sweeping light of described fiber Bragg grating (FBG) demodulator generation and the light signal of reception being transmitted into described fiber Bragg grating (FBG) demodulator to data acquisition module; Described fiber Bragg grating (FBG) demodulator is used for separating dim signal.
Data processing module, obtains temperature and the strain variation data of overhead transmission line to be measured for the light signal from demodulation, and calculates overhead transmission line to be measured inclination angle;
Client modules, for electronic geographic demonstration, the monitoring of electrical network parameter, log query and help.
Wherein, described fiber Bragg grating strain sensor comprises temperature compensation grating and strain grating, and described temperature compensation grating is for the temperature cross sensitivity of compensate for strain grating.
Wherein, described data acquisition module be arranged on two structural fiber-optic grating sensors in variable-length limit of tripod, be connected in series with optical fiber wherein by OPGW optical or OPPC OPPC splice tray.Described OPGW/OPPC is placed on optical fiber in the ground wire/phase line of aerial high voltage power line, and in order to form the fiber optic communication network on transmission line of electricity, this version has ground wire/phase line and the dual-use function of communicating by letter concurrently.
The method that application said apparatus carries out measurement of dip angle comprises:
S1. by the temperature of data acquisition module Real-time Collection power transmission line to be measured and the data of STRESS VARIATION, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection;
S2. launch narrow-band frequency-sweeping light by optical signal transceiver and demodulation module to described data acquisition module;
S3. the fiber Bragg grating strain sensor on two variable-length limits of data acquisition module intermediate cam shape structure, is reflected back and the spectrum that wherein cardiac wave appearance matches well, and this spectrum has carried the relevant information of overhead transmission line real time temperature, strain variation;
S4. light signal optical signal transceiver and demodulation module being received carries out power detection, and described light signal is demodulated into the digital signal of Wavelength-encoding;
S5. according to the digital signal obtaining, therefrom obtain temperature and the STRESS VARIATION data of power transmission line to be measured and calculate the real-time displacement delta data on the adjustable length limit of tripod, according to the length on the adjustable length limit of change in displacement specified data processing module intermediate cam frame, calculate power transmission line to be measured inclination angle by the cosine law.
Step S5 specifically comprises: digital signal enters after data processing module, can be calculated the temperature of line of electric force by the wavelength signals of carrying temperature information.The wavelength data that same group of (totally two groups) interior two fiber grating record is again by doing poor mode, carrys out the error of compensation sensor due to the signal wavelength that strain and temperature cross sensitivity are caused.Calculate the variable quantity of real-time stress, its value is identical with the variable quantity of spring (known stiffness factor) elastic force, and then can be in the hope of the stroke of spring, obtains the length on three limits of real-time tripod, can try to achieve real-time change of pitch angle by the cosine law.Pole line state is determined, can calculate the corresponding ice covering thickness value of line of electric force.
The warning system of data processing module can be according to ice covering thickness value, gives corresponding judgement and provides rudimentary warning, intermediate alarm or advanced alarm, and judged result is transferred to client modules.In addition, the significant data of said process is all saved into database, so that inquiry.
Embodiment 2:
The difference of the present embodiment and embodiment 1 is: what data acquisition module directly adopted is fiber grating displacement sensor.It can directly obtain the situation of change of displacement, can monitor pole line temperature, strain variation simultaneously.Fiber grating displacement sensor is laid on the limit of two variable-lengths of triangular structure, and as shown in Figure 4, on parallel two the variable limits that are laid in triangular structure of fiber grating displacement sensor, the 3rd limit of triangular structure is fixed edge (length is constant).One of them sensor is parallel with pole line, can synchronously respond to the strain (or displacement) of pole line.The process that the present embodiment solves inclination angle is identical with embodiment 1, is all according to obtaining Atria limit data, use the cosine law, trying to achieve the value at required angle.
Although described by reference to the accompanying drawings embodiments of the present invention, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (10)
1. the power transmission line dip measuring device based on fiber grating sensing technology, is characterized in that, this device comprises:
Data acquisition module, for temperature and the strain variation data of Real-time Collection power transmission line to be measured, described data acquisition module comprises two fiber Bragg grating strain sensors and a tripod, three limits of described tripod comprise limit and two adjustable length limits of a regular length, and a described fiber Bragg grating strain sensor is installed on every adjustable length limit;
Optical signal transceiver and demodulation module, for launching narrow-band frequency-sweeping light that described fiber Bragg grating (FBG) demodulator produces and by the light signal demodulation receiving to data acquisition module;
Data processing module, obtains temperature and the strain variation data of power transmission line to be measured for the light signal from demodulation, and calculates power transmission line to be measured inclination angle.
2. device according to claim 1, is characterized in that, described fiber Bragg grating strain sensor comprises temperature compensation grating and strain grating, and described temperature compensation grating is for the temperature cross sensitivity of compensate for strain grating.
3. device according to claim 1, is characterized in that, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection.
4. device according to claim 1, it is characterized in that, described optical signal transceiver and demodulation module comprise optical signal transceiver unit and fiber Bragg grating (FBG) demodulator, and described optical signal transceiver unit is for launching the narrow-band frequency-sweeping light of described fiber Bragg grating (FBG) demodulator generation and the light signal of reception being transmitted into described fiber Bragg grating (FBG) demodulator to data acquisition module; Described fiber Bragg grating (FBG) demodulator is used for separating dim signal.
5. device according to claim 1, is characterized in that, the fiber Bragg grating strain sensor of described data acquisition module is connected by Optical Fiber composite overhead Ground Wire or OPPC with demodulation module with described optical signal transceiver.
6. device according to claim 1, be further characterized in that, described data acquisition module further comprises two springs that stiffness factor is identical and known, a spring and a fiber Bragg grating strain sensor are installed in parallel on adjustable length limit of tripod, and another spring and another fiber Bragg grating strain sensor are installed in parallel on another adjustable length limit of tripod.
7. device according to claim 1, it is characterized in that, described fiber Bragg grating strain sensor comprises fiber grating displacement sensor, described fiber grating displacement sensor is used for gathering temperature, the strain variation data of power transmission line to be measured, and calculates the real-time displacement delta data on the adjustable length limit of tripod.
8. according to the device described in claim 3 or 7, it is characterized in that, described data processing module is specifically for obtaining temperature and the strain variation data of real-time power transmission line to be measured in the light signal from demodulation, determine the instantaneous value of the centre wavelength of fiber Bragg grating strain sensor, obtain the change in displacement on adjustable length limit according to the instantaneous value of described centre wavelength, calculate the real-time length of side on the adjustable length limit of tripod, and calculate power transmission line to be measured inclination angle by the cosine law.
9. device according to claim 1, is further characterized in that, this device also comprises client modules, for electronic geographic demonstration, the monitoring of electrical network parameter, log query and help.
10. the method for carrying out measurement of dip angle based on device described in any one in claim 1-9, is characterized in that, the method comprises:
S1. by the temperature of data acquisition module Real-time Collection power transmission line to be measured and the data of STRESS VARIATION, the instantaneous value of the centre wavelength of the fiber Bragg grating strain sensor in described data acquisition module is determined according to the data of Real-time Collection;
S2. launch narrow-band frequency-sweeping light by optical signal transceiver and demodulation module to described data acquisition module;
S3. will reflex to optical signal transceiver and demodulation module with the narrow-band frequency-sweeping light of the identical wavelength of centre wavelength of fiber Bragg grating strain sensor;
S4. light signal optical signal transceiver and demodulation module being received carries out power detection, and described light signal is demodulated into the digital signal of Wavelength-encoding;
S5. according to the digital signal obtaining, therefrom obtain temperature and the STRESS VARIATION data of power transmission line to be measured and calculate the real-time displacement delta data on the adjustable length limit of tripod, according to the length on the adjustable length limit of change in displacement specified data processing module intermediate cam frame, calculate power transmission line to be measured inclination angle by the cosine law.
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| CN112484665A (en) * | 2020-10-13 | 2021-03-12 | 深圳供电局有限公司 | Insulator deflection angle measuring method, device and system |
| CN112985479A (en) * | 2021-02-09 | 2021-06-18 | 山东省科学院海洋仪器仪表研究所 | Real-time health condition monitoring system and method for ocean buoy communication antenna |
| CN115615395A (en) * | 2022-11-18 | 2023-01-17 | 山东科技大学 | Fiber grating goaf overlying strata inclinometer and measurement method thereof |
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| CN103900529B (en) | 2017-11-07 |
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