CN113674512B - On-line monitoring and early warning system and method for electrified crossing construction site - Google Patents
On-line monitoring and early warning system and method for electrified crossing construction site Download PDFInfo
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- CN113674512B CN113674512B CN202110603177.0A CN202110603177A CN113674512B CN 113674512 B CN113674512 B CN 113674512B CN 202110603177 A CN202110603177 A CN 202110603177A CN 113674512 B CN113674512 B CN 113674512B
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Abstract
The invention discloses an online monitoring and early warning system for a live crossing construction site, which comprises an online meteorological data acquisition device, a video monitoring device, a man-machine interaction interface module, a processing module and an early warning analysis module, wherein the online meteorological data acquisition device is used for acquiring the real-time meteorological data; the output ends of the online meteorological data acquisition device and the video monitoring device are respectively connected with the processing module; the processing module is connected with the human-computer interaction interface module in a bidirectional way; the early warning analysis module is connected with the processing module in a bidirectional way; the invention monitors and collects weather data and environmental video information nearby the existing live line in real time; carrying out early warning judgment by utilizing potential information on a Dinima rope near the existing electrified line to obtain an electrified crossing construction dangerous point prediction analysis result; the influence of meteorological conditions on the construction site is fully considered, the design based on manual experience is avoided, the operability is strong, powerful data support and analysis service are provided for construction designers, the safety is good, and the market application scene is wide.
Description
Technical Field
The invention belongs to the technical field of electric field and meteorological monitoring near an overhead transmission line, and particularly relates to an on-line monitoring and early warning system and method for a live crossing construction site.
Background
In recent years, with the rapid development of power grid industry, the paths of the power transmission lines become more and more complex, so that the live-line cross operation faced by overhead power transmission line wiring construction is more and more; the transmission line is an important channel for electric energy transmission and is an essential important component of a power grid; therefore, in order to reduce the power outage loss caused by crossing line construction and the safety of newly built line construction, the uninterrupted construction is generally carried out by adopting a method of erecting a crossing frame, so that the construction cost can be effectively saved, and the construction period is shortened; in the electrified crossing construction of the power transmission line, the Dinima rope above the electrified line is easily affected by air humidity change, and when the air humidity is too high, the Dinima rope is easily heated and burned in the construction process of the overhead line, so that the influence of meteorological conditions on the construction safety in the construction process of the overhead line is necessarily considered; however, the traditional cross-over construction scheme design is based on manual experience design, and the influence of air humidity, temperature, wind speed and the like on a construction site on the cross-over scheme is not considered, so that the design scheme is rough; therefore, a powerful decision support is provided for the crossing construction of the transmission line, and a three-dimensional visual intelligent early warning system capable of synchronously detecting, automatically measuring and early warning is needed.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides an on-line monitoring and early warning system and method for a live crossing construction site, which are used for solving the technical problems that the existing crossing construction is often designed based on manual experience, the influence of meteorological conditions on the construction site is not considered, and the safety is poor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the invention provides an online monitoring and early warning system for a live crossing construction site, which comprises an online meteorological data acquisition device, a video monitoring device, a man-machine interaction interface module, a processing module and an early warning analysis module, wherein the online meteorological data acquisition device is used for acquiring the real-time meteorological data; the output ends of the online meteorological data acquisition device and the video monitoring device are respectively connected with the processing module; the processing module is connected with the human-computer interaction interface module in a bidirectional way; the early warning analysis module is connected with the processing module in a bidirectional way;
the on-line meteorological data acquisition device is used for acquiring meteorological data crossing a construction site and sending the meteorological data to the processing module; the video monitoring device is used for collecting the environment video information crossing the construction site and sending the environment video information to the processing module; the man-machine interaction interface module is used for inputting the electric power information of the existing live line and displaying the electric potential information on the Dinima rope near the existing live line;
the processing module is used for acquiring potential information on the Dinima rope near the existing live line according to the meteorological data, the environmental video information and the electric power information of the existing live line, and transmitting the potential information on the Dinima rope near the existing live line to the human-computer interaction interface module and the early warning analysis module; the early warning analysis module is used for outputting an early warning analysis result according to potential information on the Dinima rope near the existing electrified line.
Further, the weather data includes relative air humidity, air temperature, wind speed, wind direction and barometric pressure in the vicinity of existing live lines.
Further, the online meteorological data acquisition device is erected on a crossing construction site; the on-line meteorological data acquisition device comprises a temperature sensor, a humidity sensor, an anemometer and a barometer, and the output ends of the temperature sensor, the humidity sensor, the anemometer and the barometer are respectively connected with the processing module.
Further, the online meteorological data acquisition device further comprises a rainfall measuring device, and the output end of the rainfall measuring device is connected with the processing module.
Further, the environment video information is a three-dimensional environment model diagram near the existing live line; the three-dimensional environment model diagram near the existing live line is obtained by processing video image information acquired by a video detection device by using an oblique photography method.
Further, the three-dimensional environment model diagram near the existing live line comprises crossing information of the existing live line and the newly built line, surrounding live-action landform information and tower shape information.
Further, the power information of the existing live line includes the voltage value of the existing live line and the phase value of the digital line.
The invention also provides an online monitoring and early warning method for the electrified crossing construction site, which utilizes the online monitoring and early warning system for the electrified crossing construction site; the method specifically comprises the following steps:
acquiring meteorological data, environment video information and electric power information of existing electrified lines crossing a construction site;
acquiring potential information on a Dinima rope near an existing live line according to meteorological data, environmental video information and electric power information of the existing live line crossing a construction site;
and carrying out early warning judgment on potential information on the Dinima rope near the existing electrified line, and outputting to obtain an early warning analysis result.
Further, according to meteorological data, environmental video information and electric power information of existing live lines crossing construction sites, the process of acquiring electric potential information on the Dinima rope near the existing live lines is as follows:
constructing a catenary model of an existing live line according to meteorological data and environmental video information crossing a construction site;
combining the catenary model of the existing live line and the electric power information of the existing live line, and obtaining analog charge information describing the existing live line through an analog charge method;
according to the analog charge information describing the existing charged line, the potential information on the Dinima rope near the existing charged line is obtained by utilizing the superposition theorem.
Further, in the process of early warning and judging the potential information on the Dinima rope near the live line, the potential information on the Dinima rope near the existing live line is compared with a preset threshold value;
if the potential information on the Dinima rope near the existing electrified line is greater than or equal to a preset threshold value, outputting an alarm signal and marking possible dangerous points; if the potential information on the Dinima rope near the existing live line is smaller than a preset threshold value, no alarm signal exists.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides an on-line monitoring and early warning system and method for electrified crossing construction sites, which realize real-time monitoring and acquisition of meteorological data and environmental video information near existing electrified lines by arranging an on-line meteorological data acquisition device and a video monitoring device; according to the acquired meteorological data, environment video information and the electric power information of the existing live line, potential information on a Dinima rope near the existing live line is obtained, and early warning is carried out according to the potential information, so that a live crossing construction dangerous point prediction analysis result is obtained; the influence of meteorological conditions on a construction site is fully considered, the design based on manual experience is avoided, technical support and suggestion are provided for a safe construction strategy of transmission line crossing, the operability is strong, powerful data support and analysis service are provided for construction designers, the safety is good, and a wide market application scene is provided.
Further, the potential distribution information on the Dinima rope near the existing electrified line is comprehensively analyzed by adopting relative air humidity, air temperature, wind speed, wind direction and atmospheric pressure, and the dielectric constant of the Dinima rope is influenced after the Dinima rope is wetted, so that the insulation performance is changed; meanwhile, the air temperature, the wind direction and the atmospheric pressure can influence the galloping angle of the line and the distance between the line to be built and the existing electrified line, so that the dangerous point of the electrified crossing construction site can be effectively monitored, and the safety of constructors is greatly ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will briefly explain the embodiments or the drawings needed in the prior art, and it is obvious that the drawings in the following description are only some embodiments of the present invention and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block diagram of an on-line monitoring and early warning system according to the present invention;
fig. 2 is a flowchart for acquiring potential information on a diy rope in the vicinity of an existing live line in the present invention.
The system comprises a 1 online meteorological data acquisition device, a 2 video monitoring device, a 3 man-machine interaction interface module, a 4 processing module and a 5 early warning analysis module; 11 temperature sensor, 12 humidity sensor, 13 anemometer, 14 manometer.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the following specific embodiments are used for further describing the invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention provides an on-line monitoring and early warning system for a live crossing construction site, which comprises an on-line meteorological data acquisition device 1, a video monitoring device 2, a man-machine interaction interface module 3, a processing module 4 and an early warning analysis module 5; the output ends of the online meteorological data acquisition device 1 and the video monitoring device 2 are respectively connected with the processing module 4; the processing module 4 is connected with the human-computer interaction interface module 3 in a bidirectional way; the early warning analysis module 5 is connected with the processing module 4 in a bidirectional way.
The on-line meteorological data acquisition device 1 is erected on a crossing construction site and is used for acquiring meteorological data of the crossing construction site and transmitting the meteorological data to the processing module 4; the meteorological data comprise relative air humidity, air temperature, wind speed, wind direction and atmospheric pressure near the existing electrified line; the online meteorological data acquisition device 1 comprises a temperature sensor 11, a humidity sensor 12, an anemometer 13 and a barometer 14, and the output ends of the temperature sensor 11, the humidity sensor 12, the anemometer 13 and the barometer 14 are respectively connected with the processing module 4; preferably, the online meteorological data acquisition device 1 further comprises a rainfall measuring device, and the output end of the rainfall measuring device is connected with the processing module 4.
The video monitoring device 2 is erected on a crossing construction site, acquires environment video information of the crossing construction site and sends the environment video information to the processing module 4; in this embodiment, the environmental video information is a three-dimensional environmental model diagram near the existing live line; the three-dimensional environment model diagram near the existing live line comprises live-action landforms, tower shapes and wiring information of the power transmission line near the live line.
The video monitoring device 2 is used for acquiring video image information of live-action land features, pole tower shapes and power transmission line wiring near the existing live-action line, converting the acquired video image information of the live-action land features, pole tower shapes and power transmission line wiring into a three-dimensional environment model map by utilizing an oblique photographing method, and then transmitting the three-dimensional environment model map to the processing module 4; according to the invention, by arranging the video monitoring device, the real-time feedback of the environmental change of the crossing and crossing construction site is realized.
The man-machine interaction interface module 3 is used for inputting a power signal of an existing electrified line and displaying potential information on a Dinima rope near the existing electrified line; wherein, the electric power information of the existing live line comprises the voltage value of the existing live line and the phase value of a plurality of lines; in the invention, the voltage value of the electrified line is input through the man-machine interaction interface module 3, the specific value of the existing electrified line is given, and the electric field distribution condition on the Dinima rope near the existing electrified line is observed.
The processing module 4 is used for acquiring potential information on the Dinima rope near the existing live line according to meteorological data, environmental video information and electric power information of the existing live line, and transmitting the potential information on the Dinima rope near the existing live line to the man-machine interaction interface module 3 and the early warning analysis module 5; the early warning analysis module 5 is used for outputting early warning analysis results according to potential information on the Dinima rope near the existing electrified line.
The invention also provides an online monitoring and early warning method for the electrified worse crossing construction site, which comprises the following steps:
and step 3, comparing the potential information on the Dinima rope near the existing electrified line with a preset threshold value, performing early warning judgment, and outputting to obtain an early warning analysis result.
Examples
As shown in fig. 1-2, the embodiment provides an on-line monitoring and early warning system for electrified crossing construction sites, which comprises an on-line meteorological data acquisition device 1, a video monitoring device 2, a man-machine interaction interface module 3, a processing module 4 and an early warning analysis module 5; the output ends of the online meteorological data acquisition device 1 and the video monitoring device 2 are respectively connected with the processing module 4; the processing module 4 is connected with the human-computer interaction interface module 3 in a bidirectional way; the early warning analysis module 5 is connected with the processing module 4 in a bidirectional way.
In the embodiment, an online meteorological data acquisition device 1 is erected on a crossing construction site and is used for acquiring meteorological data near an existing electrified line; the collected meteorological data comprises relative air humidity, air temperature, wind speed, wind direction and atmospheric pressure, and the collected meteorological data is sent to the processing module 4.
The online meteorological data acquisition device 1 comprises a temperature sensor 11, a humidity sensor 12, an anemometer 13 and a barometer 14; the output ends of the temperature sensor 11, the humidity sensor 12, the anemoscope 13 and the barometer 14 are respectively connected with the processing module 4; wherein the temperature sensor 11 is used for collecting the temperature near the existing live line, and the humidity sensor 12 is used for collecting the relative air humidity near the existing live line; the anemometer 13 collects wind speed and wind direction near the existing live line; barometer 14 collects the atmospheric pressure near the existing live line; in this embodiment, other meteorological data measurement devices, such as rainfall measurement devices, may be added according to the crossing sites and actual requirements; the output end of the rainfall measuring device is connected with the input end of the processing module 4 and is used for collecting real-time rainfall information near the existing electrified line and transmitting the real-time rainfall information to the processing module 4.
The video monitoring device 2 is erected on a crossing construction site and is used for collecting video image information of live-action landforms, tower shapes and power transmission line wiring near the existing live-line, processing the collected video image information by using an oblique photography method to obtain a three-dimensional environment image model, and sending the three-dimensional environment image model to the processing module 4 for subsequent analysis of potential information on a Dinima rope near the existing live-line; according to the embodiment, by arranging the video monitoring device 2, the real-time feedback of the change of the overhead line construction site is realized, the dangerous point of the construction site can be effectively predicted, and the safety of constructors is ensured; meanwhile, necessary parameter data can be improved, and subsequent adjustment of the crossing construction design scheme is facilitated.
The man-machine interaction interface module 3 is used for inputting the voltage value of the existing live line, the specific phase value of the given live line and observing the potential information on the Dinima rope near the existing live line circuit.
The processing module 4 is used for calculating and analyzing the data information acquired by the online meteorological data acquisition device and the video monitoring device to obtain potential information on the Dinima rope near the existing electrified line, and transmitting a calculation result to the early warning analysis module and the man-machine interaction operation interface module.
The early warning analysis module 5 is used for judging whether the potential information on the Dinima rope near the existing electrified line is larger than or equal to a set threshold value; if yes, indicating that dangerous points exist in the Dinima rope near the existing electrified line, sending an alarm signal by the early warning analysis module, and marking corresponding dangerous points on the man-machine interaction operation interface module; if not, the fact that the electrified crossing site has no dangerous point is indicated, and normal wire erection construction can be achieved; and meanwhile, outputting an early warning analysis result report.
The embodiment also provides an online monitoring and early warning method for the electrified crossing construction site, which specifically comprises the following steps:
And 4, collecting the acquired meteorological data, video information and the electric power information of the existing live line by using the processing module, performing potential analysis and calculation to obtain potential information on the Dinima rope near the existing live line, and transmitting the potential information on the Dinima rope near the existing live line to the early warning analysis module.
In this embodiment, the process of acquiring potential information on a diy rope near an existing live line according to meteorological data, environmental video information and electric power information of the existing live line crossing a construction site is specifically as follows:
step 41, constructing a catenary model of the existing live line according to meteorological data and environmental video information crossing a construction site; the expression of the catenary model of the existing live line is as follows:
wherein, sigma 0 The lowest point horizontal stress is represented, gamma represents overhead specific load, h represents the height difference of two suspension points, l represents the conductor span, and y represents the height of the transmission line along with the change of x.
In the invention, the specific load of the overhead line refers to the load applied to the overhead line in unit length is converted into a numerical value in unit section, and the unit is N/m.mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The load acting on the overhead line mainly comprises dead weight, ice weight, wind load, wind ratio load after ice coating and the like, and the corresponding overhead line ratio load comprises self weight ratio load, ice weight ratio load, wind pressure ratio load, ice coating wind pressure ratio load and the like.
(1) Self-weight specific load
The self-weight load refers to a load caused by the mass of the overhead line itself, and the size thereof can be considered to be unaffected by changes in weather conditions. The self-weight specific load is calculated by the following formula:
wherein m is 0 The mass per unit length of the overhead line is represented by a, the sectional area of the overhead line is represented by a, the gravitational acceleration is represented by g, and g=9.80665 m/s 2 。
(2) Ice weight ratio load
The ice weight during icing is borne by the overhead line, and when the icing thickness is known, the icing volume on the overhead line in unit length is as follows:
if the density of the ice coating is ρ=900 kg/m 3 ＝0.9×10 -3 kg/m·mm 2 The ice weight ratio load is:
where b represents the ice coating thickness and d represents the outer diameter of the overhead wire.
(3) Total specific load of dead weight and ice weight
γ 3 ＝γ 1 +γ 2 。
In the embodiment, the horizontal specific load comprises an ice-free wind pressure specific load and an ice-coated wind pressure specific load, and the direction acts in the horizontal plane; to achieve a desired wind pressure ratio, it is necessary to know the theoretical wind pressure acting on the overhead line. The theoretical wind pressure refers to the pressure generated by the kinetic energy of air per unit mass over a unit area of the windward body. Theoretically wind pressure is related to wind speed and air density, and according to bernoulli's equation in fluid mechanics, theoretical wind pressure is:
wherein W is v Represents theoretical wind pressure, v represents wind speed, ρ represents air density, ρ 0 The dry air density at 0 ℃ and 101.3kPa, t represents the ambient temperature, P represents the atmospheric pressure, H r Indicating relative air humidity, P w Representing saturated water vapor pressure.
(4) Wind pressure ratio load without ice
Considering that the wind speeds are generally different on the whole span, the influence of the windward area shape (body type) of the overhead line on the air flow, and the wind direction and the line trend are always at a certain angle, the wind pressure ratio load when no ice is calculated according to the following formula:
wherein alpha is f The specific values of the non-uniform coefficients of the wind speed are shown in tables 1 and 2; c represents the wind carrier type coefficient, when d<C=1.2 at 17mm and c=1.1 at d317 mm; θ represents the angle between the wind direction and the line direction.
(5) Wind pressure ratio load during ice coating
When the overhead line is coated with ice, the diameter of the overhead line is changed from d to d+2b, the windward area is increased, and meanwhile, the wind carrier type coefficient is different from that of the ice coating. The design rules specify: the wind load type coefficient at the time of icing was uniformly taken as c=1.2 regardless of the line diameter.
The wind pressure ratio load calculation formula when the overhead line is iced can be expressed as:
(6) Ice-free and windy combined specific load:
(7) Icing is comprehensive than carrying when having wind:
in this embodiment, the catenary model of the power transmission line under different conditions of temperature, humidity, pressure and the like can be obtained by combining the above power transmission line catenary formula and overhead line specific load calculation formula with the environmental video information and the meteorological information, so that subsequent calculation is facilitated.
Step 42, combining the catenary model of the existing live line and the electric power information of the existing live line, and obtaining analog charge information describing the existing live line through an analog charge method; in this embodiment, the process of acquiring analog charge information describing the existing charged line by the analog charge method is specifically as follows:
setting simulated charges, positions and the number of matching points according to a catenary model of an existing charged line;
establishing an analog charge equation, and solving to obtain charge values of analog charges of all the position points;
selecting a check point on the surface of the power transmission line, calculating the potential of the check point by using the obtained charge value of the analog charge, and calculating the relative error between the potential of the check point and the input power transmission line surface potential;
judging the relative error and the set error value, if the relative error is smaller than the set error value, outputting the charge value of the analog charge of each position point to obtain analog charge information describing the existing live line; if the set error value is greater than or equal to the set error value, returning to reset the analog charge and the matching point and solving.
Step 43, according to analog charge information describing the existing charged line, obtaining potential information on a Dinima rope near the existing charged line by using a superposition theorem; the potential information of the existing charged line can be obtained by calculation by using analog charge information describing the existing charged line; in this embodiment, the acquired potential information of the existing live line is stored in the background for calling and checking.
And 6, the designer adjusts the construction scheme of the crossing site and gives out subsequent construction decisions according to the early warning analysis result report.
According to the live crossing construction site online monitoring and early warning system and method, the online meteorological data acquisition device and the video monitoring device are arranged, so that real-time monitoring and acquisition of meteorological data and environmental video information near the existing live line is realized; according to the acquired meteorological data, environment video information and the electric power information of the existing live line, potential information on a Dinima rope near the existing live line is obtained, and early warning is carried out according to the potential information, so that a live crossing construction dangerous point prediction analysis result is obtained; the influence of meteorological conditions on a construction site is fully considered, the design based on manual experience is avoided, technical support and suggestion are provided for a safe construction strategy of transmission line crossing, the operability is strong, powerful data support and analysis service are provided for construction designers, the safety is good, and a wide market application scene is provided.
The above embodiment is only one of the implementation manners capable of implementing the technical solution of the present invention, and the scope of the claimed invention is not limited to the embodiment, but also includes any changes, substitutions and other implementation manners easily recognized by those skilled in the art within the technical scope of the present invention.
Claims (8)
1. The on-line monitoring and early warning system for the electrified crossing construction site is characterized by comprising an on-line meteorological data acquisition device (1), a video monitoring device (2), a man-machine interaction interface module (3), a processing module (4) and an early warning analysis module (5); the output ends of the online meteorological data acquisition device (1) and the video monitoring device (2) are respectively connected with the processing module (4); the processing module (4) is connected with the human-computer interaction interface module (3) in a bidirectional way; the early warning analysis module (5) is connected with the processing module (4) in a bidirectional way;
the online meteorological data acquisition device (1) is used for acquiring meteorological data crossing a construction site and sending the meteorological data to the processing module (4); the video monitoring device (2) is used for collecting the environment video information crossing the construction site and sending the environment video information to the processing module (4); the man-machine interaction interface module (3) is used for inputting the electric power information of the existing live line and displaying the electric potential information on the Dinima rope near the existing live line;
the processing module (4) is used for acquiring potential information on the Dinima rope near the existing live line according to meteorological data, environment video information and electric power information of the existing live line, and transmitting the potential information on the Dinima rope near the existing live line to the human-computer interaction interface module (3) and the early warning analysis module (5); the early warning analysis module (5) is used for outputting an early warning analysis result according to potential information on the Dinima rope near the existing electrified line;
the online monitoring and early warning method applied to the online monitoring and early warning system of the electrified crossing construction site specifically comprises the following steps:
acquiring meteorological data, environment video information and electric power information of existing electrified lines crossing a construction site;
acquiring potential information on a Dinima rope near an existing live line according to meteorological data, environmental video information and electric power information of the existing live line crossing a construction site;
carrying out early warning judgment on potential information on a Dinima rope near the existing electrified line, and outputting to obtain an early warning analysis result;
according to meteorological data, environment video information and electric power information of existing live lines crossing construction sites, the process of acquiring electric potential information on a Dinima rope near the existing live lines is as follows:
constructing a catenary model of an existing live line according to meteorological data and environmental video information crossing a construction site;
the expression of the catenary model of the existing live line is as follows:
wherein, sigma 0 The method comprises the steps of representing the horizontal stress of the lowest point, gamma representing overhead specific load, h representing the height difference of two suspension points, l representing the span of a wire, and y representing the height of a power transmission line along with the change of x;
combining the catenary model of the existing live line and the electric power information of the existing live line, and obtaining analog charge information describing the existing live line through an analog charge method;
according to the analog charge information describing the existing charged line, the potential information on the Dinima rope near the existing charged line is obtained by utilizing the superposition theorem.
2. The on-line monitoring and early warning system for live crossing construction sites according to claim 1, wherein the meteorological data comprises relative air humidity, air temperature, wind speed, wind direction and atmospheric pressure in the vicinity of existing live lines.
3. The on-line monitoring and early warning system for the electrified cross-over construction site according to claim 1, wherein the on-line meteorological data acquisition device (1) is erected on the cross-over construction site; the online meteorological data acquisition device (1) comprises a temperature sensor (11), a humidity sensor (12), an anemoscope (13) and a barometer (14), wherein the output ends of the temperature sensor (11), the humidity sensor (12), the anemoscope (13) and the barometer (14) are respectively connected with the processing module (4).
4. An on-line monitoring and early warning system for electrified crossing construction sites according to claim 3 is characterized in that the on-line meteorological data acquisition device (1) further comprises a rainfall measuring device, and the output end of the rainfall measuring device is connected with the processing module (4).
5. The on-line monitoring and early warning system for electrified crossing construction sites according to claim 1, wherein the environmental video information is a three-dimensional environmental model diagram near existing electrified lines; the three-dimensional environment model diagram near the existing live line is obtained by processing video image information acquired by a video monitoring device (2) by an oblique photography method.
6. The on-line monitoring and early warning system for live-line crossover construction sites according to claim 5, wherein the three-dimensional environment model diagram near the existing live-line comprises crossover information, surrounding live-line relief information and tower shape information of the existing live-line and the newly-built line.
7. The system of claim 1, wherein the power information of the existing live line includes a voltage value of the existing live line and a phase value of the plurality of lines.
8. The on-line monitoring and early warning system for electrified crossing construction sites according to claim 1, wherein the early warning judgment process of the potential information on the Dinima rope near the electrified line is implemented by comparing the potential information on the Dinima rope near the existing electrified line with a preset threshold;
if the potential information on the Dinima rope near the existing electrified line is greater than or equal to a preset threshold value, outputting an alarm signal and marking possible dangerous points; if the potential information on the Dinima rope near the existing live line is smaller than a preset threshold value, no alarm signal exists.
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