CN111210594A - Overhead line crane external-damage-prevention safety distance monitoring and alarming method and system - Google Patents
Overhead line crane external-damage-prevention safety distance monitoring and alarming method and system Download PDFInfo
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- CN111210594A CN111210594A CN202010090503.8A CN202010090503A CN111210594A CN 111210594 A CN111210594 A CN 111210594A CN 202010090503 A CN202010090503 A CN 202010090503A CN 111210594 A CN111210594 A CN 111210594A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0236—Threshold setting
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0266—System arrangements wherein the object is to detect the exact distance between parent and child or surveyor and item
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
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Abstract
The invention discloses a method and a system for monitoring and alarming the safety distance of an overhead line for preventing a crane from being broken outside in the technical field of power transmission lines, and aims to solve the technical problems that in the prior art, a near-electricity alarming system can only warn a crane driver, and cannot realize real-time monitoring of safety operation of a plurality of cranes by a power company supervision personnel. The method comprises the following steps: acquiring the electric field intensity of the near-electricity end of the crane; acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity; comparing the safety distance with a preset threshold value; if the safety distance is smaller than the preset threshold value, an alarm is sent to the crane control terminal or/and the safety monitoring terminal, the alarm sent to the crane control terminal comprises a sound alarm, and the alarm sent to the safety monitoring terminal comprises a short message alarm.
Description
Technical Field
The invention relates to a method and a system for monitoring and alarming a safety distance of an overhead line for preventing a crane from being broken outside, and belongs to the technical field of power transmission lines.
Background
The transmission line has wide distribution area and long transmission distance, and is easily influenced by environmental climate and interference of life and production activities of people. In recent years, the number of events damaging the safe operation of the line due to external force damage and the like is continuously increased, so that casualties, equipment damage and property loss are brought to parties, and the safe and stable operation of a power grid in the whole area and the stable development of social economy are seriously influenced, so that the high-voltage overhead line is always in objective demand of power enterprises. In addition, due to the lack of professional early warning systems, when engineering work is carried out around an overhead line, operators and engineering equipment are prone to mistakenly enter a safe operation range specified by the electric power industry standard, and further dangerous accidents such as electric shock of the operators and wire touch of the engineering equipment can be caused, and huge losses are caused to electric power enterprises.
Aiming at preventing external damage of a high-voltage overhead line, an infrared correlation early warning mode is adopted as a coping means in the past, but an infrared correlation early warning device has no target tracking and behavior identification functions, has no selectivity for identifying an invaded object, is easy to have false reports and missing reports, and cannot meet practical application. In recent years, the video monitoring device is adopted to prevent external force damage in the power industry, and the technical products still have certain defects, which are shown in the following steps: the coverage range of a video monitoring lens is limited, objective problems such as shooting blind areas, overlapping of visual angles and the like exist, and false alarm and missing report often occur; when the real-time monitoring video is wirelessly transmitted back, the flow is large, the cost is high, and the system is easy to power off and stop working; if single-frame images with long sampling intervals are automatically returned or a field real-time video is remotely checked by manually starting the machine, the key sample video is easily missed and missed, and the report is missed.
Aiming at the engineering operation early warning of an overhead line, in order to avoid safety accidents occurring when engineering operation is carried out around the overhead line, the installation of a near-electricity alarm device on a construction vehicle is an important means of safety distance early warning, the false report and the missed report rate are low, the target pertinence is strong, the occurrence of external broken behaviors such as electric shock prevention, line collision and the like can be effectively inhibited, a part of construction units and electric power enterprises begin to adopt the early warning, but the effect is general, and the reason mainly lies in: the existing near-electricity alarm device has large power consumption and complex operation, needs a special battery and a charger for wiring charging, has poor portability and can not meet the requirements of complex construction environments on site; the system can only warn a crane driver, and cannot realize the real-time monitoring of the supervision personnel of the power company on the safety operation of a plurality of cranes, thereby ensuring that the system can be timely brought to the site for investigation and maintenance before dangerous situations occur, and fully realizing the prevention of construction external damage of the overhead line.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a method and a system for monitoring and alarming the safety distance of an overhead line for preventing a crane from being broken outside, so as to solve the technical problems that in the prior art, a near-electricity alarming system can only warn a crane driver, and cannot realize real-time monitoring of safety operation of a plurality of cranes by a power company supervisor.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a safety distance monitoring and alarming method for preventing an overhead line from being broken outside a crane comprises the following steps:
acquiring the electric field intensity of the near-electricity end of the crane;
acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity;
comparing the safety distance with a preset threshold value;
if the safety distance is smaller than the preset threshold value, an alarm is sent to the crane control terminal or/and the safety monitoring terminal, the alarm sent to the crane control terminal comprises a sound alarm, and the alarm sent to the safety monitoring terminal comprises a short message alarm.
Further, still include: and pushing the safety distance or/and the alarm times to the safety monitoring terminal.
Further, still include:
acquiring a crane position;
and pushing the crane position to the safety monitoring terminal.
In order to achieve the purpose, the invention also provides a safety distance monitoring and alarming system for preventing the crane from being broken outside for the overhead line, which comprises a near electricity sensing end, a relay processing end and a safety monitoring terminal, wherein the near electricity sensing end is deployed at the near electricity end of the crane;
the near-electricity sensing end is used for acquiring the electric field intensity of the near-electricity end of the crane;
the relay processing terminal is used for obtaining the safe distance of the crane near-electricity end based on the electric field intensity, comparing the safe distance with a preset threshold value, and sending an alarm to the crane control terminal or/and the safety monitoring terminal if the safe distance is smaller than the preset threshold value.
Further, the relay processing terminal comprises a background relay and a cloud server which are in communication connection with each other;
the background relay is used for acquiring the position of the crane, acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity, comparing the safety distance with a preset threshold value, and sending a sound alarm to the crane control terminal if the safety distance is smaller than the preset threshold value;
the cloud server is used for pushing at least any one of the safety distance, the alarm frequency and the crane position to the safety monitoring terminal, and sending a short message alarm to the safety monitoring terminal if the safety distance is smaller than a preset threshold value.
Further, the crane proximal end comprises a crane boom end, and the back office deployed position comprises a crane cab.
Further, the safety monitoring terminal comprises a handheld terminal in wireless communication connection with the cloud server.
Furthermore, the near-electricity sensing end adopts a software or/and hardware mode to perform low-power-consumption operation, and comprises a miniature electric field probe, an amplification filtering module, a first controller and a first wireless communication module which are electrically connected in sequence;
the miniature electric field probe is used for converting the power frequency electric field intensity of the near electric end of the crane into an electric signal;
the amplifying and filtering module is used for amplifying or/and filtering interference components of the electric signals to obtain power frequency electric field signals;
the first controller is used for carrying out software filtering on the power frequency electric field signal;
the first wireless communication module is used for transmitting the power frequency electric field signal after the software filtering to the background relay.
Further, the background relay comprises a second controller, and a second wireless communication module, a buzzer and a third wireless communication module which are electrically connected with the second controller respectively;
the second wireless communication module is used for receiving the power frequency electric field signal which is transmitted by the first wireless communication module and filtered by the software;
the second controller is used for analyzing the power frequency electric field signal filtered by the software, acquiring the safe distance of the near electric end of the crane, comparing the safe distance with a preset threshold value, and controlling the buzzer to give out a sound alarm if the safe distance is smaller than the preset threshold value;
the third wireless communication module is used for transmitting the safe distance or/and the crane position to the cloud server.
Further, the first controller or/and the second controller comprises an MCU module, the first wireless communication module or/and the second wireless communication module comprises a Lora communication module, and the third wireless communication module comprises a GPRS communication module.
Compared with the prior art, the invention has the following beneficial effects: the method and the system of the invention take the size of the safety distance as the reference value of the anti-external-damage early warning, can avoid the false alarm and are more visual and accurate; when the safety distance is smaller than a preset threshold value, a short message is sent to the handheld terminal by the cloud server to give an alarm, so that the monitoring personnel of the power company can remotely monitor the safety operation of a plurality of engineering cranes within the administration range in real time, and the monitoring personnel of the power company can be reminded to carry out on-site investigation and potential safety hazard detection in the first time, so that the monitoring personnel can be guaranteed to carry out on-site investigation and maintenance in time before a dangerous case occurs, and the overhead line can be fully protected from external damage during construction. The system has low power consumption, long endurance, strong portability, convenient assembly and disassembly and no influence on crane construction.
Drawings
FIG. 1 is a schematic diagram of the components of an embodiment of the system of the present invention;
FIG. 2 is a schematic diagram of a structure of a near-electric sensing terminal according to an embodiment of the present invention;
FIG. 3 is a logic diagram of the low power consumption operation of the near-power sensing terminal according to the embodiment of the present invention;
fig. 4 is a schematic structural diagram of a background relay according to an embodiment of the system of the present invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
The specific embodiment of the invention provides a method for monitoring and alarming the safe distance of an overhead line for preventing a crane from being broken outside, which comprises the following steps:
acquiring the position of a crane and the electric field intensity of a near-electricity end of the crane;
acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity;
comparing the safety distance with a preset threshold value, if the safety distance is smaller than the preset threshold value, sending a sound alarm to the crane control terminal, and sending a short message alarm to the safety monitoring terminal;
and pushing the safety distance, the alarm times and the crane position to the safety monitoring terminal.
The specific embodiment of the invention provides a safety distance monitoring and alarming system for preventing an overhead line from being broken by a crane, which is used for realizing the method, as shown in fig. 1, the system is a schematic composition structure diagram of the embodiment of the system, and comprises a near-electricity sensing end, a background relay, a cloud server and a handheld terminal which are sequentially in communication connection, and the working principle of the system is as follows: the near-electricity sensing end monitors the electric field intensity of the top of the crane jib in real time and sends the electric field intensity to the background relay; the background relay analyzes and processes the received signals, obtains the safety distance between the crane jib and the overhead line, and sends the safety distance to the cloud server; and the handheld terminal accesses the cloud server to obtain the safe distance of the suspension arm, so that remote monitoring is realized. In this embodiment, can regard as relay processing end with backstage relay and high in the clouds server, regard as the safety monitoring terminal with handheld terminal, regard as crane driver as crane control terminal.
More specifically, as shown in fig. 2, the near-electric sensing end according to the embodiment of the present invention is a schematic structural diagram, where the near-electric sensing end is composed of a micro electric field probe, an amplification and filtering module, a first controller, a first wireless communication module, a lithium battery, a battery voltage collecting module, and a charging protection module, where the micro electric field probe, the amplification and filtering module, the first controller, and the first wireless communication module are electrically connected in sequence, in this embodiment, the micro electric field probe is used to detect a power frequency electric field intensity, the first controller is a micro control unit (MCU module), and the first wireless communication module is a Lora communication module. The working principle of the near-electricity sensing end is as follows: the micro electric field probe works in a passive state; the amplifying and filtering module amplifies a weak voltage signal input by the micro electric field probe, filters a high-frequency electromagnetic interference component and outputs the high-frequency electromagnetic interference component to an ADC (analog to digital converter) port of the MCU module; the MCU module collects the power frequency electric field signals of the ADC port, further eliminates external interference in a software filtering mode, and then transmits the signals to the Lora communication module to realize wireless transparent transmission of data. Wherein, enlarge filtering module, Lora communication module, MCU module and be supplied power by the lithium cell, battery voltage acquisition module passes through the resistance partial pressure mode, converts lithium cell voltage into the ADC signal that the MCU module can read, and the ADC port battery voltage signal is gathered to the MCU module, then with this signal transfer to Lora communication module. When the lithium battery feeds electricity, the lithium battery can be charged by an external power supply through the charging protection module.
In a single construction period, because the lifting interval of the crane jib is long, the electric energy stored by the lithium battery is continuously consumed, in order to realize that the single construction period of the near-electricity sensing end is free from disassembly and does not influence the construction process, the near-electricity sensing end adopts two modes of software and hardware to realize low-power-consumption operation, and as shown in fig. 3, the near-electricity sensing end is a schematic diagram of the low-power-consumption working logic of the near-electricity sensing end in the embodiment of the system. The software mode means that the MCU kernel enters a sleep mode, and the power consumption of the MCU reaches the lowest. The hardware mode means that the MCU runs an instruction to cut off the power supply of the peripheral (the amplification and filtering module, and the Lora communication module) before entering the sleep mode, and the power consumption of the peripheral is completely changed to 0. The working logic of low power consumption and long endurance is that a clock is initialized, whether obvious electric field intensity (indicating that the electric field intensity is close to an overhead line but still outside a safe distance range) is detected or not is judged, and if yes, an early warning mode is entered, namely, an electric field is detected, and signals are relayed to a background in real time; if not, the MCU module enters a low power consumption mode, firstly triggers an instruction to disconnect the peripheral power supply, then enters a sleep mode, and then waits for waking up a clock; after entering the wake-up clock, the MCU module exits the sleep mode, the trigger instruction restores the power supply of the peripheral, and the near-power sensing end continues to detect the electric field intensity.
More specifically, as shown in fig. 4, the configuration diagram of the background relay according to the embodiment of the present invention is shown, where the background relay is composed of a buzzer, a second controller, a second wireless communication module, a positioning module, a third wireless communication module, a buzzer, a lithium battery, a battery voltage acquisition module, and a charging protection module, and the second wireless communication module, the buzzer, the positioning module, and the third wireless communication module are electrically connected to the second controller respectively. In this embodiment, the second controller adopts an MCU module, the second wireless communication module adopts a Lora communication module, the positioning module adopts a GPS module, and the third wireless communication module adopts a GPRS module. The working principle of the background relay is as follows: the Lora communication module receives a signal sent by the near-electricity sensing end and transmits the signal to the MCU module; the MCU module analyzes the received signal, converts the signal according to the electric field intensity to obtain the safe distance, sends the result to the GPS/GPRS module, and then transmits the result to the cloud server through the GPS/GPRS module; if the safe distance is smaller than the set threshold value, the buzzer alarms, and the smaller the safe distance is, the higher the alarm frequency is; the GPS/GPRS module also transmits the GPS positioning signal of the background relay to the cloud server, so that the position of the crane can be monitored. The GPS/GPRS module, the Lora communication module and the MCU module are powered by the lithium battery, and when the lithium battery is fed, the lithium battery is charged by the charging protection module through an external power supply.
In this embodiment, the near-electricity sensing end is attached to the end portion of the boom of the crane, the background relay is placed in a cab of the crane, and a power company supervision worker carries out remote real-time monitoring on safety operation of a plurality of engineering cranes in a line construction field through the handheld terminal. The electric power company supervisor clicks the corresponding operation interface through the handheld terminal to access the cloud server so as to obtain the position, the safe distance value and the historical alarm times of the construction crane in the line jurisdiction range. When the safe distance is smaller than the set threshold value, the cloud server can automatically send safe distance alarm information and the crane position to the handheld terminal in a short message mode so as to remind a power company supervisor to go to the site for troubleshooting potential safety hazards at the first time.
The method and the system of the invention take the size of the safety distance as the reference value of the anti-external-damage early warning, can avoid the false alarm and are more visual and accurate; when the safety distance is smaller than a preset threshold value, a short message is sent to the handheld terminal by the cloud server to give an alarm, so that the monitoring personnel of the power company can remotely monitor the safety operation of a plurality of engineering cranes within the administration range in real time, and the monitoring personnel of the power company can be reminded to carry out on-site investigation and potential safety hazard detection in the first time, so that the monitoring personnel can be guaranteed to carry out on-site investigation and maintenance in time before a dangerous case occurs, and the overhead line can be fully protected from external damage during construction. The system has low power consumption, long endurance, strong portability, convenient assembly and disassembly and no influence on crane construction.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A safety distance monitoring and alarming method for preventing an overhead line from being broken outside a crane is characterized by comprising the following steps:
acquiring the electric field intensity of the near-electricity end of the crane;
acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity;
comparing the safety distance with a preset threshold value;
if the safety distance is smaller than the preset threshold value, an alarm is sent to the crane control terminal or/and the safety monitoring terminal, the alarm sent to the crane control terminal comprises a sound alarm, and the alarm sent to the safety monitoring terminal comprises a short message alarm.
2. The overhead line crane-breakage-preventing safety distance monitoring and alarming method as claimed in claim 1, further comprising: and pushing the safety distance or/and the alarm times to the safety monitoring terminal.
3. The overhead line crane-breakage-preventing safety distance monitoring and alarming method as claimed in claim 2, further comprising:
acquiring a crane position;
and pushing the crane position to the safety monitoring terminal.
4. A safety distance monitoring and alarming system for preventing an overhead line from being broken outside a crane is characterized by comprising a near electricity sensing end, a relay processing end and a safety monitoring terminal, wherein the near electricity sensing end is arranged at the near electricity end of the crane;
the near-electricity sensing end is used for acquiring the electric field intensity of the near-electricity end of the crane;
the relay processing terminal is used for obtaining the safe distance of the crane near-electricity end based on the electric field intensity, comparing the safe distance with a preset threshold value, and sending an alarm to the crane control terminal or/and the safety monitoring terminal if the safe distance is smaller than the preset threshold value.
5. The overhead line crane-breakage-preventing safety distance monitoring and alarming system as claimed in claim 4, wherein the relay processing terminal comprises a background relay and a cloud server which are in communication connection with each other;
the background relay is used for acquiring the position of the crane, acquiring the safety distance of the near-electricity end of the crane based on the electric field intensity, comparing the safety distance with a preset threshold value, and sending a sound alarm to the crane control terminal if the safety distance is smaller than the preset threshold value;
the cloud server is used for pushing at least any one of the safety distance, the alarm frequency and the crane position to the safety monitoring terminal, and sending a short message alarm to the safety monitoring terminal if the safety distance is smaller than a preset threshold value.
6. The overhead line crane-break-proof safety distance monitoring and warning system of claim 5 wherein said crane proximal end comprises a crane boom tip and said background relay deployment location comprises a crane cab.
7. The overhead line crane-breakage-preventing safety distance monitoring and warning system as claimed in claim 5, wherein the safety monitoring terminal comprises a handheld terminal in wireless communication connection with a cloud server.
8. The overhead line crane-breakage-preventing safety distance monitoring and alarming system as recited in claim 5, wherein the near-electricity sensing end performs low-power-consumption operation in a software or/and hardware manner, and comprises a miniature electric field probe, an amplification filtering module, a first controller and a first wireless communication module which are electrically connected in sequence;
the miniature electric field probe is used for converting the power frequency electric field intensity of the near electric end of the crane into an electric signal;
the amplifying and filtering module is used for amplifying or/and filtering interference components of the electric signals to obtain power frequency electric field signals;
the first controller is used for carrying out software filtering on the power frequency electric field signal;
the first wireless communication module is used for transmitting the power frequency electric field signal after the software filtering to the background relay.
9. The overhead line crane-breakage-preventing safety distance monitoring and warning system as claimed in claim 8, wherein the background relay includes a second controller, and a second wireless communication module, a buzzer and a third wireless communication module electrically connected thereto, respectively;
the second wireless communication module is used for receiving the power frequency electric field signal which is transmitted by the first wireless communication module and filtered by the software;
the second controller is used for analyzing the power frequency electric field signal filtered by the software, acquiring the safe distance of the near electric end of the crane, comparing the safe distance with a preset threshold value, and controlling the buzzer to give out a sound alarm if the safe distance is smaller than the preset threshold value;
the third wireless communication module is used for transmitting the safe distance or/and the crane position to the cloud server.
10. The overhead line crane-outbreak-prevention safety distance monitoring and alarming system as claimed in claim 9, wherein the first controller or/and the second controller comprises an MCU module, the first wireless communication module or/and the second wireless communication module comprises a Lora communication module, and the third wireless communication module comprises a GPRS communication module.
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| CN112053536A (en) * | 2020-09-30 | 2020-12-08 | 江苏兴力建设集团有限公司 | Induction type near live safety distance early warning system and method thereof |
| CN112258800A (en) * | 2020-09-14 | 2021-01-22 | 云南电网有限责任公司昆明供电局 | Beidou satellite technology-based power transmission line external force damage monitoring system and method |
| CN112859085A (en) * | 2021-01-07 | 2021-05-28 | 国网浙江省电力有限公司宁波供电公司 | Lifting car bucket monitoring terminal and lifting car bucket monitoring control method |
| CN115600470A (en) * | 2022-12-12 | 2023-01-13 | 广东威恒输变电工程有限公司（Cn） | Power transmission line live loop simulation judgment method, application and safety early warning method |
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| CN115600470A (en) * | 2022-12-12 | 2023-01-13 | 广东威恒输变电工程有限公司（Cn） | Power transmission line live loop simulation judgment method, application and safety early warning method |
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