CN112351246B - Combined positioning method based on video monitoring and wireless communication in cable tunnel - Google Patents
Combined positioning method based on video monitoring and wireless communication in cable tunnel Download PDFInfo
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- CN112351246B CN112351246B CN202011029150.7A CN202011029150A CN112351246B CN 112351246 B CN112351246 B CN 112351246B CN 202011029150 A CN202011029150 A CN 202011029150A CN 112351246 B CN112351246 B CN 112351246B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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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
- H04W4/025—Services making use of location information using location based information parameters
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Abstract
The invention discloses a combined positioning method based on video monitoring and wireless communication in a cable tunnel, which comprises the following steps: installing a plurality of video monitoring units in a cable tunnel and a wireless communication system based on an optical fiber repeater and a leakage cable; when operation and maintenance personnel work in the cable tunnel, the processor of the cable on-line monitoring main station platform utilizes a video monitoring and image recognition algorithm to realize coarse positioning of the operation and maintenance personnel and utilizes the mutual cooperation of the wireless communication system and the mobile terminal to realize fine positioning of the operation and maintenance personnel and defects. The two positioning methods adopted by the invention are matched with each other, and the two positioning methods have the main and backup complementary functions, so that even if one method cannot normally operate due to special conditions, the accurate positioning of operation and maintenance personnel and defects in the tunnel can be realized, the personnel safety of inspection in the cable tunnel can be guaranteed, and the periodic inspection and timely maintenance of the defects can be facilitated.
Description
Technical Field
The invention relates to the technical field of power transmission cable positioning, in particular to a combined positioning method based on video monitoring and wireless communication in a cable tunnel.
Background
With the development of cities to modernization and intellectualization, higher demands are put forward on the development of power grids, and compared with overhead lines, cables have the advantages of small occupied area, large conveying capacity, beautifying urban capacity and the like, and the overhead lines are changed into cables to be put into the ground to become a necessary trend. The cable tunnel is put into operation in a large quantity, so that huge inspection and overhaul pressure is brought to first-line operation and maintenance personnel. At present, the space structure of the cable tunnel is special, the GPS signal cannot be received in the space structure, and the space structure lacks of communication network coverage, so that great inconvenience is brought to inspection and maintenance work.
The operation and maintenance personnel lack effective location and range finding means in the cable tunnel, can't get in touch with the online monitoring master station platform of cable, be in the state of losing after entering the cable tunnel, the problem that warning and operation and maintenance personnel on-the-spot discovery that the master station platform monitored can't communicate each other. Once the emergency situation endangering personal safety occurs in the cable tunnel, the main station platform cannot know the situation at the first time, and also cannot accurately position operation and maintenance personnel, so that rescue efficiency is affected. In addition, in the process of inspecting in the cable tunnel, operation and maintenance personnel need to photograph, evidence and record and report the found tunnel defects, but the defect positions are under the conditions of unclear description and unclear expression. The operation and maintenance personnel lack effective distance measurement means, can only select a reference object in the tunnel by experience and estimate the relative distance, and can not accurately position the defect. Such a subjective estimate of the resulting deviation is detrimental to the re-discovery and repair of defects, and is a potential hazard. Therefore, a positioning method suitable for use in a cable tunnel is required to be provided, so that accurate positioning of operation and maintenance personnel and defects in the tunnel is realized, and the requirements of construction strategy and production operation and maintenance work of the ubiquitous Internet of things of companies are met.
At present, no positioning method in a cable tunnel is specially applicable, and the existing positioning methods of other study objects begin from the technical field of communication and rely on the matching of a leakage cable or a wireless base station and a corresponding mobile terminal to finish interactive positioning. The cable tunnel has strict requirements on fireproof measures, and fireproof doors which are designed and installed every 200m in the tunnel can form natural barriers to wireless signals, so that the existing positioning method is limited. The scheme of leakage cable, positioner and radio frequency card has low signal reliability and obvious attenuation under the condition of longer cable tunnel, and lacks means for effectively penetrating through the fireproof door. The scheme of the wireless base station and the mobile terminal needs to record the signal intensity of each position in the tunnel in advance, but the positioning accuracy is easy to influence, and the existence of the fireproof door enables wireless signals to not pass through the fireproof partition, so that a large number of wireless base stations need to be installed.
Therefore, the practical configuration of the environment monitoring equipment in the cable tunnel is combined, the limitation of the fireproof door to the positioning method is considered, the combined positioning method suitable for the cable tunnel is designed, the accurate positioning of operation and maintenance personnel and defects in the tunnel is realized, the personal safety of inspection in the cable tunnel is guaranteed, and the periodic inspection and timely maintenance of the defects are facilitated.
Disclosure of Invention
Aiming at the problems, the invention provides a method for realizing the positioning of operation and maintenance personnel and defects in a cable tunnel, which meets the requirements of ubiquitous Internet of things construction strategy and production operation and maintenance work.
In order to achieve the above object, the present invention provides a combined positioning method based on video monitoring and wireless communication in a cable tunnel, comprising:
s1: installing a plurality of video monitoring units in a cable tunnel and a wireless communication system based on an optical fiber repeater and a leakage cable;
s2: the video monitoring unit transmits the collected video images to a cable online monitoring master station platform in a wired or wireless communication mode;
s3: the processor of the cable online monitoring master station platform locks operation and maintenance personnel in a section between two adjacent video monitoring units according to video images, so that coarse positioning of the positions of the operation and maintenance personnel is realized;
s4: the operation and maintenance personnel carry a mobile terminal with an active positioning function, and when an emergency situation occurs or a defect in a cable tunnel is found through inspection, the operation and maintenance personnel transmit two different groups of pulse signals to the wireless communication system based on the optical fiber repeater and the leakage cable through an emergency button and a defect button of the mobile terminal, wherein the pulse signals comprise time information; the wireless communication system based on the optical fiber repeater and the leakage cable transmits pulse signals to the cable on-line monitoring master station platform;
s5: the cable on-line monitoring main station platform detects the pulse signals, performs condition identification according to the pulse signals, calculates the positions of the operation and maintenance personnel according to the time information of the pulse signals, and realizes fine positioning of the operation and maintenance personnel.
In the preferred mode, when installing the video monitoring units along the cable tunnel, installing the video monitoring units at intervals according to the length of the cable tunnel, wherein the video monitoring units are powered by independent distribution box power supplies.
Under the preferred mode, the video monitoring unit divides the cable tunnel into a plurality of monitoring sections, the image recognition algorithm configured by the cable on-line monitoring main station platform processor climbs the shadow information passing through the video image, the video monitoring unit passing through by the operation and maintenance personnel is recorded, and then the section between two adjacent video monitoring units where the operation and maintenance personnel is located is determined compared with the video monitoring unit without passing through the operation and maintenance personnel.
Preferably, the wireless communication system based on the optical fiber repeater and the leakage cable comprises the optical fiber repeater, wherein the optical fiber repeater is placed at a certain distance in a cable tunnel, and two adjacent optical fiber repeaters are connected through the leakage cable arranged along the cable tunnel; the optical fiber repeater station is communicated with the cable on-line monitoring main station platform through an external receiving antenna, and receives and transmits wireless signals through a leakage cable arranged along a cable tunnel, and the leakage cable passes through a fireproof door through feeder line perforation to realize full coverage of the wireless signals.
In a preferred mode, the time information in the pulse signals received by the cable on-line monitoring master station platform comprises the time t of triggering the pulse signals by the mobile terminal 1 And the time t for receiving pulse signals by the optical fiber repeater adjacent to the mobile terminal 2 Electric powerThe cable online monitoring master station platform monitors the two time information t 1 、t 2 And processing, and multiplying the obtained time difference by the transmission wave speed to realize the calculation of the distance between the mobile terminal and two optical fiber repeater stations adjacent to the mobile terminal.
The beneficial effects of the invention are as follows: the positioning problem in the cable tunnel is effectively solved, the personal safety of inspection in the cable tunnel is guaranteed, and the periodic inspection and timely maintenance of defects are facilitated.
Drawings
FIG. 1 is a schematic diagram of a video surveillance and wireless communication system;
FIG. 2 is a flow chart of the present invention.
Detailed Description
As shown in fig. 2, the combined positioning method based on video monitoring and wireless communication in a cable tunnel of the present invention includes:
s1: installing a plurality of video monitoring units in a cable tunnel and a wireless communication system based on an optical fiber repeater and a leakage cable;
s2: the video monitoring unit transmits the collected video images to a cable online monitoring master station platform in a wired or wireless communication mode;
s3: the processor of the cable online monitoring master station platform locks operation and maintenance personnel in a section between two adjacent video monitoring units according to video images, so that coarse positioning of the positions of the operation and maintenance personnel is realized;
s4: the operation and maintenance personnel carry a mobile terminal with an active positioning function, and when an emergency situation occurs or a defect in a cable tunnel is found through inspection, the operation and maintenance personnel transmit two different groups of pulse signals to the wireless communication system based on the optical fiber repeater and the leakage cable through an emergency button and a defect button of the mobile terminal, wherein the pulse signals comprise time information; the wireless communication system based on the optical fiber repeater and the leakage cable transmits pulse signals to the cable on-line monitoring master station platform; when an operation and maintenance person presses an emergency button on the mobile terminal, the online monitoring master station platform can receive a pulse signal group with the content of 11111111, and when a defect button is pressed, the online monitoring master station platform can receive a pulse signal group with the content of 00000000, and the two pulse signals are completely different, so that accurate identification is facilitated;
s5: the cable on-line monitoring main station platform detects the pulse signals, performs condition identification according to the pulse signals, calculates the positions of the operation and maintenance personnel according to the time information of the pulse signals, and realizes fine positioning of the operation and maintenance personnel.
As shown in fig. 2, when the video monitoring units are installed along the cable tunnel, one video monitoring unit is installed every 200m according to the length of the cable tunnel, and the video monitoring unit is powered by an independent distribution box power supply. The wired or wireless communication mode of the video monitoring image is as follows: the data is collected to the collector through carrier communication, and then the collector can be uploaded to the cable on-line monitoring master station platform in a wired or wireless mode. The wired type is realized by means of a communication substation in a transformer substation and an internal private network of a national power grid company, and a wireless host is arranged on a wireless form through a cable terminal tower and is transmitted by means of a 4G public network.
As shown in fig. 2, the video monitoring unit divides the cable tunnel into a plurality of monitoring sections, an image recognition algorithm configured by a processor of the cable on-line monitoring master station platform climbs the shadow information passing through the video image, records the video monitoring units passing through by the operation and maintenance personnel, and further determines the section between two adjacent video monitoring units where the operation and maintenance personnel are located compared with the video monitoring units not passing through the operation and maintenance personnel.
As shown in fig. 2, the wireless communication system based on the optical fiber repeater and the leaky cable comprises the optical fiber repeater, wherein the optical fiber repeater is placed at a certain distance in a cable tunnel, the specific distance depends on the tunnel size and trend, and two adjacent optical fiber repeaters are connected through the leaky cable arranged along the cable tunnel; the wireless communication system based on the optical fiber repeater and the leakage cable is a communication interconnection channel between operation and maintenance personnel in the tunnel and an online monitoring master station platform. The optical fiber repeater is a signal transmission medium, 4G communication signals are led into the tunnel through an external receiving antenna, wireless coverage is formed through a leakage cable, and the interaction between operation and maintenance personnel and a cable on-line monitoring main station platform is realized directly through a mobile phone. The optical fiber repeater stations are connected through armored optical fibers, the distance and the number of installation positions are required to consider the characteristics of the trend of tunnels and the distribution box power distribution, and leakage cables penetrate through fireproof doors through feeder line perforation, so that shielding limitation of the leakage cables is solved.
The time information in the pulse signals received by the cable on-line monitoring master station platform comprises the time t of triggering the pulse signals by the mobile terminal 1 And the time t for receiving pulse signals by the optical fiber repeater adjacent to the mobile terminal 2 The cable on-line monitoring master station platform monitors the two time information t 1 、t 2 And processing, and multiplying the obtained time difference by the transmission wave speed to realize the calculation of the distance between the mobile terminal and two optical fiber repeater stations adjacent to the mobile terminal.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should be covered by the protection scope of the present invention by making equivalents and modifications to the technical solution and the inventive concept thereof.
Claims (3)
1. The combined positioning method based on video monitoring and wireless communication in the cable tunnel is characterized by comprising the following steps of:
s1: installing a plurality of video monitoring units in a cable tunnel and a wireless communication system based on an optical fiber repeater and a leakage cable;
s2: the video monitoring unit transmits the collected video images to a cable online monitoring master station platform in a wired or wireless communication mode; specifically, the method comprises the following steps:
the data are collected to the collector through carrier communication, and then the collector can be uploaded to a cable on-line monitoring master station platform in a wired or wireless mode; the wired type is realized by means of a communication substation in a transformer substation and an internal private network of a national power grid company, a wireless host is arranged on a wireless form through a cable terminal tower, and the wireless host is transmitted by means of a 4G public network;
s3: the processor of the cable online monitoring master station platform locks operation and maintenance personnel in a section between two adjacent video monitoring units according to video images, so that coarse positioning of the positions of the operation and maintenance personnel is realized;
s4: the operation and maintenance personnel carry a mobile terminal with an active positioning function, and when an emergency situation occurs or a defect in a cable tunnel is found through inspection, the operation and maintenance personnel transmit two different groups of pulse signals to the wireless communication system based on the optical fiber repeater and the leakage cable through an emergency button and a defect button of the mobile terminal, wherein the pulse signals comprise time information; the wireless communication system based on the optical fiber repeater and the leakage cable transmits pulse signals to the cable on-line monitoring master station platform;
the wireless communication system based on the optical fiber repeater and the leakage cable comprises the optical fiber repeater, wherein the optical fiber repeater is placed at a certain distance in a cable tunnel, and two adjacent optical fiber repeaters are connected through the leakage cable arranged along the cable tunnel; the optical fiber repeater station is communicated with the cable online monitoring main station platform through an external receiving antenna, and receives and transmits wireless signals through a leakage cable arranged along a cable tunnel, and the leakage cable passes through a fireproof door through feeder perforation to realize full coverage of the wireless signals;
s5: after the cable online monitoring master station platform detects the pulse signals, carrying out condition recognition according to the pulse signals and calculating the positions of operation and maintenance personnel according to the time information of the pulse signals, so as to realize fine positioning of the operation and maintenance personnel; specifically, the method comprises the following steps:
the time information in the pulse signals received by the cable on-line monitoring master station platform comprises the time t of triggering the pulse signals by the mobile terminal 1 And the time t for receiving pulse signals by the optical fiber repeater adjacent to the mobile terminal 2 The cable on-line monitoring master station platform triggers pulse signal time t to the mobile terminal 1 The time t for receiving pulse signals by the optical fiber repeater adjacent to the mobile terminal 2 And processing, and multiplying the obtained time difference by the transmission wave speed to realize the calculation of the distance between the mobile terminal and two optical fiber repeater stations adjacent to the mobile terminal.
2. The combined positioning method based on video monitoring and wireless communication in a cable tunnel according to claim 1, wherein when the video monitoring units are installed along the cable tunnel, one video monitoring unit is installed at intervals according to the length of the cable tunnel, and the video monitoring units are powered by an independent distribution box power supply.
3. The combined positioning method based on video monitoring and wireless communication in a cable tunnel according to claim 2, wherein the video monitoring unit divides the cable tunnel into a plurality of monitoring sections, an image recognition algorithm configured by a platform processor of the cable online monitoring master station climbs the shadow information passing through the video image, the video monitoring unit passing through by an operation and maintenance person is recorded, and the section between two adjacent video monitoring units where the operation and maintenance person is located is determined compared with the video monitoring unit without passing through the operation and maintenance person.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011029150.7A CN112351246B (en) | 2020-09-25 | 2020-09-25 | Combined positioning method based on video monitoring and wireless communication in cable tunnel |
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| CN202011029150.7A CN112351246B (en) | 2020-09-25 | 2020-09-25 | Combined positioning method based on video monitoring and wireless communication in cable tunnel |
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| CN112351246B true CN112351246B (en) | 2023-04-28 |
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| JP2000295792A (en) * | 1999-04-02 | 2000-10-20 | Toko Electric Corp | Terminal apparatus and tunnel monitoring system |
| CN102387350A (en) * | 2011-11-08 | 2012-03-21 | 天津银箭科技有限公司 | Wireless monitoring positioning system for tunnel |
| CN102817635A (en) * | 2012-07-19 | 2012-12-12 | 山东康威通信技术股份有限公司 | Wired emergency communication and commander positioning system for power tunnel |
| CN107037318A (en) * | 2016-11-25 | 2017-08-11 | 国网河南省电力公司平顶山供电公司 | A kind of power cable fault locating platform |
| CN108564751A (en) * | 2018-04-28 | 2018-09-21 | 国网重庆市电力公司 | The monitoring method of cable tunnel anti-intrusion, apparatus and system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000295792A (en) * | 1999-04-02 | 2000-10-20 | Toko Electric Corp | Terminal apparatus and tunnel monitoring system |
| CN102387350A (en) * | 2011-11-08 | 2012-03-21 | 天津银箭科技有限公司 | Wireless monitoring positioning system for tunnel |
| CN102817635A (en) * | 2012-07-19 | 2012-12-12 | 山东康威通信技术股份有限公司 | Wired emergency communication and commander positioning system for power tunnel |
| CN107037318A (en) * | 2016-11-25 | 2017-08-11 | 国网河南省电力公司平顶山供电公司 | A kind of power cable fault locating platform |
| CN108564751A (en) * | 2018-04-28 | 2018-09-21 | 国网重庆市电力公司 | The monitoring method of cable tunnel anti-intrusion, apparatus and system |
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