CN109089219B - Patrol communication method for high-voltage cable patrol vehicle - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/02—Services making use of location information
- H04W4/021—Services related to particular areas, e.g. point of interest [POI] services, venue services or geofences
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C1/00—Registering, indicating or recording the time of events or elapsed time, e.g. time-recorders for work people
- G07C1/20—Checking timed patrols, e.g. of watchman
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
- H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/20—Communication route or path selection, e.g. power-based or shortest path routing based on geographic position or location
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- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
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Abstract
The invention belongs to the field of high-voltage cable inspection communication methods, and particularly relates to an inspection communication method for a high-voltage cable inspection vehicle. The invention obtains an optimal communication link by adopting calculation according to the position coordinates of the transmission base station, adopts two working modes of relay transmission or wireless AP (access point) transmission, is suitable for transmitting larger data volume, transmitting alarm information and real-time communication within a certain time, facilitates the communication between cable inspection personnel and a master station expert, and facilitates the guidance of the master station expert on field work.
Description
Technical Field
The invention belongs to the field of high-voltage cable inspection communication methods, and particularly relates to an inspection communication method for a high-voltage cable inspection vehicle.
Background
With the improvement of modern management concept, the field operation and maintenance management is gradually changed from extensive management to fine management, and from information to digital intelligent operation and maintenance support.
The intelligent operation and maintenance of cable inspection has great realization difficulty, the current cable inspection operation environment is complex, especially high-voltage cables are widely distributed in county areas, centralized lean management is not facilitated, inspection information is easy to lose due to the manual inertia and the problem of inconvenient county area communication, and the field operation and maintenance management is not facilitated to change from extensive management to fine management.
The current polling communication mode mainly has three modes:
1. the power carrier communication is more suitable for a power carrier communication mode under the occasions with short distance and low voltage of the power transmission line, and when the routing inspection distance is increased or strong electric signal interference exists on the power transmission line, the reliability of the mode is greatly reduced.
2. The mobile communication network needs to use a base station network of a mobile service operator, so that better communication requirements are difficult to achieve in areas with less base station distribution, the use cost is higher, communication information needs to pass through a third-party operator server, and unsafe factors exist.
3. A wireless communication link, such as the signal relay communication method disclosed in chinese patent CN201510758209.9, realizes communication by establishing communication channels distributed along a power transmission line, but the communication mode is transmitted along a fixed communication route, and the power transmission line is not distributed along a straight line, which causes redundant transmission of communication signals at the cable bending point, reduces communication efficiency, and requires a long time when the data amount is large.
The existing inspection mode is that each team carries an inspection vehicle and a wireless communication device to inspect on a power transmission cable, the inspection devices carried by the teams, such as a thermal imager and other devices, need to transmit collected data to a backstage master station for inspection and maintenance regulation in time, and the existing communication mode is not suitable for transmission operation due to the reasons of poor signal quality, high cost, large data volume and the like, and if the wireless resources can be integrated together, the inspection communication effect can be greatly facilitated, and the communication efficiency is improved.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides the inspection communication method for the high-voltage cable inspection vehicle, which can realize the quick construction of a communication link for inspection data transmission, is beneficial to shortening a communication path and improving the communication effect and efficiency.
The invention adopts the specific technical scheme that:
the patrol communication method for the high-voltage cable patrol vehicle is executed by a transmission base station and a background master station, the transmission base station comprises a patrol vehicle-mounted base station and a tower footing base station, the tower footing base stations are arranged on a power transmission tower one by one, the patrol vehicle-mounted base station and the tower footing base station are provided with satellite communication modules, the construction method of the patrol communication comprises the following steps,
a. the position coordinates of all the transmission base stations are updated to the background master station in real time through the satellite communication module;
b. the inspection personnel initiates a communication request to a background master station through a transmission base station satellite communication module;
c. after the background master station collects the position coordinates of all the transmission base stations, all the transmission base stations in the communication link are obtained through calculation;
d. the background master station informs the polling vehicle-mounted base station and/or the tower footing base station in the communication link to enter a working state through the satellite communication module;
e. the next-level adjacent communication base stations in the communication link are communicated, and the communication condition of the background master station is fed back through the satellite communication module;
f. all transmission base stations in the communication link feed back normally, and then the communication link is built;
g. and the polling personnel send data to the background master station by polling the vehicle-mounted base station through the communication link.
In step c, the communication link calculation method of the background central station is as follows:
c1, marking the position coordinates of all the transmission base stations in a map, marking the position coordinates of the transmission base station which initiates the communication request as a starting point, and marking the position coordinates of the background general station as an end point;
c2, drawing rays from the starting point to the end point, taking the starting point as the origin point and taking the rays from the starting point to the end point as the positive direction of the X axis, and establishing a rectangular coordinate system;
c3, drawing a broadcast circle domain by taking the starting point as the center of a circle and the maximum broadcast distance r of the transmission base station as the radius, wherein all the transmission base stations falling into the broadcast circle domain in the first quadrant and the fourth quadrant of the coordinate system are stations to be selected;
c4, drawing a line segment rhoxConnecting the origin with the coordinates of the station to be selected, and taking the absolute value theta of the included angle between the line segment and the X axisxThen min θxThe corresponding station to be selected is a first-level preferred transfer station;
c5, establishing a rectangular coordinate system by taking the first-level preferred transfer station as an origin, repeating the steps c3 and c4 until a terminal point, namely a background master station, appears in the broadcast circle area, jumping out of the loop, and numbering all transmission base stations required by the communication link according to the hierarchical sequence.
In the step e, the communication method of the communication link is that the transmission base station performs handshake connection with the next transmission base station, the transmission base station wirelessly sends a request signal to the next transmission base station, and the transmission base station is determined to be communicated after receiving a feedback signal sent back by the next transmission base station.
In the step f, if the transmission base station which is not fed back normally exists in the communication link within the time delay T, the background head station eliminates the position coordinates of the transmission base station which is not fed back normally, and the step c is returned.
In the step c3, the method for determining that the transmission base station falls into the broadcast circular domain is to calculate the linear distance l between the transmission base station at the starting point and the adjacent transmission base station to be determined according to the coordinate information of the transmission base station;
if l is less than or equal to r, the transmission base station falls into a broadcast circular domain;
if l > r, the transmitting base station does not fall into the broadcast circular domain.
The invention has the beneficial effects that:
the invention obtains an optimal communication link by adopting calculation according to the position coordinates of the transmission base station, adopts two working modes of relay transmission or wireless AP (access point) transmission, is suitable for transmitting larger data volume, transmitting alarm information and communicating in real time for a certain time, is convenient for the communication between inspection personnel of the high-voltage cable and a master station expert, is convenient for the master station expert to guide the field work, and compared with the existing communication system with step-by-step transmission, the solution provided by the invention can realize the quick construction of the communication link for the cable inspection data transmission, is beneficial to shortening the communication path and improving the communication effect and efficiency.
Drawings
FIG. 1 is a flow chart diagram of a communication link establishment method of the present invention;
FIG. 2 is a schematic diagram of coordinates of a first-level transfer station in a communication link;
FIG. 3 is a schematic diagram of coordinates of a second level transfer station in a communication link;
FIG. 4 is a schematic diagram of coordinates of a third-level transfer station in a communication link;
FIG. 5 is a schematic diagram of coordinates of a fourth-level transfer station in the communication link;
FIG. 6 is a schematic diagram of a communication link;
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
the invention provides a polling communication method for a high-voltage cable polling vehicle, which is executed by a transmission base station and a background master station, wherein the transmission base station comprises a polling vehicle-mounted base station and a tower-based base station, the tower-based base stations are arranged on an electric power transmission tower one by one, the polling vehicle-mounted base station and the tower-based base station are provided with satellite communication modules, polling personnel transmit image data acquired on site to the background master station in real time or transmit the image data after integration through a wearable thermal imaging machine, a camera and other equipment, experts of the background master station guide and cooperate with the personnel on site after study and judgment, thereby improving polling efficiency, being beneficial to the gradual change from a rough type to a fine type of management of the operation and maintenance management on site, and realizing the problem of difficulty and being capable of obtaining the remote real-time guidance of the relevant experts, through unblocked information channel, can also make things convenient for the research personnel to further carry out the research and development of operation and maintenance correlation technique, accomplish task and look over, operation guidance and the real-time video assistance of long-range expert for realizing VR image recognition and pursuit, reduce the operation and maintenance degree of difficulty, provide the basic condition.
Embodiment 1, in order to solve the problem that the existing tower-based communication system cannot perform the function of inspecting vehicles and other units equipped with communication equipment by transmitting information step by step, the inspection communication building method includes the following steps, as shown in fig. 1,
a. the position coordinates of all the transmission base stations are updated to the background master station in real time through the satellite communication module, and the data also facilitate the regulation and control of polling personnel and vehicles;
b. the inspection personnel initiates a communication request to a background master station through a transmission base station satellite communication module;
c. after the background master station collects the position coordinates of all the transmission base stations, all the transmission base stations in the communication link are obtained through calculation;
d. the background master station informs the polling vehicle-mounted base station and/or the tower footing base station in the communication link to enter a working state through the satellite communication module;
e. the next-level adjacent communication base stations in the communication link are communicated, and the communication condition of the background master station is fed back through the satellite communication module;
f. all transmission base stations in the communication link feed back normally, and then the communication link is built;
g. and the polling personnel send data to the background master station by polling the vehicle-mounted base station through the communication link.
The satellite communication module adopts a positioning and short message communication device based on a Beidou satellite, has the functions of position acquisition, position transmission and transmission communication with small data volume, and has the characteristics of low cost and wide application range.
In embodiment 2, as shown in fig. 2 to fig. 5, in step c, the communication link calculation method of the background central station includes:
c1, marking the position coordinates of all the transmission base stations in a map, marking the position coordinates of the transmission base station which initiates the communication request as a starting point, and marking the position coordinates of the background general station as an end point;
c2, drawing rays from the starting point to the end point, taking the starting point as the origin point and taking the rays from the starting point to the end point as the positive direction of the X axis, and establishing a rectangular coordinate system;
c3, drawing a broadcast circle domain by taking the starting point as the center of a circle and the maximum broadcast distance r of the transmission base station as the radius, wherein all the transmission base stations falling into the broadcast circle domain in the first quadrant and the fourth quadrant of the coordinate system are stations to be selected;
c4, drawing a line segment rhoxConnecting the origin with the coordinates of the station to be selected, and taking the absolute value theta of the included angle between the line segment and the X axisxThen min θxThe corresponding station to be selected is a first-level preferred transfer station;
c5, establishing a rectangular coordinate system by taking the first-level preferred transfer station as an origin, repeating the steps c3 and c4 until a terminal point, namely a background master station, appears in the broadcast circle area, jumping out of the loop, and numbering all transmission base stations required by the communication link according to the hierarchical sequence.
The number 1 is used as a polling vehicle-mounted base station, the number 0 is used as a background master station,
a first stage: as shown in fig. 2, the transmission base station labeled 1 is used as a center of a circle to establish a coordinate system and draw a broadcast circle, and at this time, two tower footing base stations T2 and T1 are respectively located in the first quadrant and the second quadrant, and it can be determined that T2 in the first quadrant is the first-level preferred transfer station according to the rule of step c 3;
and a second stage: as shown in fig. 3, the coordinate system is established and the broadcast circle domain is drawn by using the transmission base station labeled T2 as the center of the circle, at this time, there are a tower footing base station of T3, a transmission base station No. 1 as the starting point and a patrol inspection vehicle-mounted base station of C1 in the first, third and fourth quadrants, respectively, it can be determined according to the rule of step C3 that two base stations of T3 and C1 are the second-level preferred relay station, the transmission base station No. 1 is automatically excluded by the rule of step C3 to avoid the cyclic locking of the signals, and according to step C4, the angle θ formed by the two base stations of T3 and C1 is1And theta2To obtain theta2<θ1Then theta is selected2The corresponding C1 is the second-level preferred transfer station;
and a third stage: as shown in fig. 4, the transmission base station labeled C1 is used as the center of a circle to establish a coordinate system and draw a broadcast circle, and at this time, there are tower-based base stations of T4, T5, T3 and T2 and inspection vehicle-mounted base stations of C2 in the first, second and fourth quadrants, respectively, the preferred transfer stations of the third stage of T4, T5 and C2 can be determined according to the rule of step C3, the transmission base station labeled C1 is automatically excluded by the rule of step C3 to avoid the cyclic locking of signals, and the angles θ formed by comparing T T4, T5 and C2 are compared according to the rule of step C41、θ2、θ3To obtain theta2<θ3<θ1Then theta is selected2The corresponding T5 is the third-level preferred transfer station;
fourth stage: as shown in fig. 5, the transmission base station with the reference number T5 is used as a center of a circle to establish a coordinate system and draw a broadcast circular domain, and at this time, since the broadcast circular domain covers the 0 # background master station, a loop is skipped according to step c5, so that selection of all base stations in the transmission link is completed, and step c5 avoids a situation that when a certain transmission base station and the background master station are in the same direction, the link passes through the transmission base station and reaches the background master station, thereby avoiding redundant transmission of signals to the greatest extent and shortening the transmission path.
At this point, the communication link calculation is finished, as shown in fig. 6:
a first stage: t2 tower footing base station;
and a second stage: c1 polling the vehicle-mounted base station;
and a third stage: t5 tower footing base station;
fourth stage: number 0 background head station;
after being forwarded by the transmission base station, the No. 1 inspection vehicle-mounted base station interacts information with the No. 0 background master station, the lease time of the communication link is determined according to needs and is kept within 15-30 minutes by default, and when the lease time is up, the communication link is recalculated, so that the communication failure caused by the movement of the inspection vehicle-mounted base station is avoided, and the timeliness of the communication link is ensured.
In embodiment 3, in the step e, the communication method of the communication link is that the transmission base station performs handshake connection with the next transmission base station, the transmission base station wirelessly sends a request signal to the next transmission base station, and after receiving a feedback signal sent back by the next transmission base station, it is determined that the transmission base stations are communicated. The communication method is started by the number 1 polling vehicle-mounted base station, the communication condition is verified step by step, if the communication is not smooth, if the normal transmission base station which is not fed back exists in the communication link within the time delay T in the step f, the background master station rejects the position coordinates of the normal transmission base station which is not fed back, and the step c is returned. And c, deleting coordinates of the base stations which cannot be communicated from all the transmission base stations in the step c, and indicating that the wireless signals of the base stations are not smoothly transmitted, so that the selection of the link is restarted.
The communication base station purchases wireless communication equipment of the same type, has uploading and wireless forwarding functions, has a rainproof structure design, can be used in an outdoor environment, supports multipath alarm input and anti-dismantling alarm input, supports a wireless forwarding function, provides a group of direct current output interfaces for providing power for an insulator working condition detector, provides a normally open and normally closed alarm output interface, can be used for linkage alarm or driving police and other equipment, provides a direct current input interface, can be externally input with a DC15V power supply for power supply, has a shell anti-dismantling and mobile alarm function, has a wireless transmission distance of 3-10 kilometers open and a working temperature of-20-60 ℃.
In specific embodiment 4, in the step c3, the method for determining that the transmission base station falls into the broadcast circular domain includes calculating a linear distance l between the transmission base station at the starting point and the adjacent transmission base station to be determined according to the coordinate information of the transmission base station;
if l is less than or equal to r, the transmission base station falls into a broadcast circular domain;
if l > r, the transmitting base station does not fall into the broadcast circular domain.
The invention skillfully utilizes the position difference between the inspection vehicle-mounted base station and the tower footing base station caused by the travel of the inspection vehicle along the road, shortens the inspection communication distance to the maximum extent, and improves the communication quality.
The invention mainly solves the following problems:
1. the problem of information loss of manual inertia and routing inspection engineering is solved, automatic storage and retention are facilitated, experiences are accumulated, a knowledge base is formed, and through data analysis, the root cause and the perception trend of the problem are found in time;
2. the problem that theoretical training cannot be associated with field practice and difficult problems cannot be remotely guided in real time is solved. Through providing VR image recognition and tracking, task checking, operation guidance and remote expert real-time video assistance can be achieved, and therefore the operation and maintenance difficulty is reduced, and the operation and maintenance efficiency is improved.
Social benefits are as follows: the operation and maintenance efficiency can be improved, the operation and maintenance cost is saved, and the improvement efficiency is about 30%.
Claims (4)
1. A patrol communication method for a high-voltage cable patrol vehicle is executed by a transmission base station and a background master station, wherein the transmission base station comprises a patrol vehicle-mounted base station and a tower footing base station, the tower footing base stations are arranged on a power transmission tower one by one, and the patrol vehicle-mounted base station and the tower footing base station are provided with satellite communication modules, and the patrol communication method is characterized in that: the construction method of the patrol communication comprises the following steps,
a. the position coordinates of all the transmission base stations are updated to the background master station in real time through the satellite communication module;
b. the inspection personnel initiates a communication request to a background master station through a transmission base station satellite communication module;
c. after the background master station collects the position coordinates of all the transmission base stations, all the transmission base stations in the communication link are obtained through calculation;
d. the background master station informs the polling vehicle-mounted base station and/or the tower footing base station in the communication link to enter a working state through the satellite communication module;
e. the next-level adjacent communication base stations in the communication link are communicated, and the communication condition of the background master station is fed back through the satellite communication module;
f. all transmission base stations in the communication link feed back normally, and then the communication link is built;
g. the polling personnel transmits data to the background master station by polling the vehicle-mounted base station through the communication link;
in the step e, the communication method of the communication link is that the transmission base station performs handshake connection with the next transmission base station, the transmission base station wirelessly sends a request signal to the next transmission base station, and the transmission base station is determined to be communicated after receiving a feedback signal sent back by the next transmission base station.
2. The inspection communication method for the high-voltage cable inspection vehicle according to claim 1, wherein: in step c, the communication link calculation method of the background central station is as follows:
c1, marking the position coordinates of all the transmission base stations in a map, marking the position coordinates of the transmission base station which initiates the communication request as a starting point, and marking the position coordinates of the background general station as an end point;
c2, drawing rays from the starting point to the end point, taking the starting point as the origin point and taking the rays from the starting point to the end point as the positive direction of the X axis, and establishing a rectangular coordinate system;
c3, drawing a broadcast circle domain by taking the starting point as the center of a circle and the maximum broadcast distance r of the transmission base station as the radius, wherein all the transmission base stations falling into the broadcast circle domain in the first quadrant and the fourth quadrant of the coordinate system are stations to be selected;
c4, drawing a line segment rhoxConnecting the origin with the coordinates of the station to be selected, and taking the absolute value theta of the included angle between the line segment and the X axisxThen min θxThe corresponding station to be selected is a first-level preferred transfer station;
c5, establishing a rectangular coordinate system by taking the first-level preferred transfer station as an origin, repeating the steps c3 and c4 until a terminal point, namely a background master station, appears in the broadcast circle area, jumping out of the loop, and numbering all transmission base stations required by the communication link according to the hierarchical sequence.
3. The inspection communication method for the high-voltage cable inspection vehicle according to claim 1, wherein: in the step f, if the transmission base station which is not fed back normally exists in the communication link within the time delay T, the background head station eliminates the position coordinates of the transmission base station which is not fed back normally, and the step c is returned.
4. The inspection communication method for the high-voltage cable inspection vehicle according to claim 2, wherein: in the step c3, the method for determining that the transmission base station falls into the broadcast circular domain is to calculate the linear distance l between the transmission base station at the starting point and the adjacent transmission base station to be determined according to the coordinate information of the transmission base station;
if l is less than or equal to r, the transmission base station falls into a broadcast circular domain;
if l > r, the transmitting base station does not fall into the broadcast circular domain.
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| CN101483567A (en) * | 2008-12-19 | 2009-07-15 | 西北电网有限公司 | High voltage electricity transmission line monitoring method based on wireless communication and optical communication |
| CN101917693A (en) * | 2010-07-03 | 2010-12-15 | 湖南航天亚卫通信电子有限公司 | Emergency communication system and method |
| CN102149161A (en) * | 2011-01-24 | 2011-08-10 | 重庆大学 | Hierarchical and regular mesh network routing method |
| CN103476015A (en) * | 2013-08-27 | 2013-12-25 | 国家电网公司 | Electricity emergency communication link system and construction method of communication link |
| CN104579427A (en) * | 2015-01-12 | 2015-04-29 | 国家电网公司 | Power wireless communication system and communication method |
| CN105427561A (en) * | 2015-11-09 | 2016-03-23 | 江苏省电力公司检修分公司 | Signal relay communication method of on-line monitoring device for electric transmission line poles and towers |
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