CN108519507A - One kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device - Google Patents
One kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device Download PDFInfo
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- CN108519507A CN108519507A CN201810320883.2A CN201810320883A CN108519507A CN 108519507 A CN108519507 A CN 108519507A CN 201810320883 A CN201810320883 A CN 201810320883A CN 108519507 A CN108519507 A CN 108519507A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/145—Indicating the presence of current or voltage
- G01R19/155—Indicating the presence of voltage
Abstract
The invention belongs to high voltage testing equipment and technical field of radio, it is especially a kind of to be based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, including aerial electrical verification system and ground monitoring system, aerial electrical verification system includes unmanned plane and the insulating bar on unmanned plane, electrical verification module is set on insulating bar, first central processing module, 315MHz wireless sending modules and 433MHz wireless sending modules, ground monitoring system includes 315MHz wireless receiving modules, second central processing module, sound alarm module, 433MHz wireless receiving modules, third central processing module, light alarm module.The present invention uses the aerial measuring device with electricity of double frequency double source, carries electroscopic device in the air, ascends a height operation without personnel, reduces the danger of personnel, and secondly, double frequency double source ensure that the reliability of alarm signal triggering.
Description
Technical field
The invention belongs to high voltage testing equipment and technical field of radio, especially a kind of to be based on double frequency two-way wireless trigger
Transmission line of electricity electroscopic device.
Background technology
When for high pressure and extra high voltage network interruption maintenance, need to whether correctly being had a power failure also by maintenance wireline inspection
It is to carry voltage, to ensure operating personnel's safety.High voltage testing technology is a kind of technology of comparative maturity in a grid equipment,
Traditional electrical verification mode is to use insulation electricity-inspection device to carry out electrical verification, electrical verification dress to circuit after operating personnel carries the towers such as electroscopic device
All there is certain risk in the insulation performance and operation electrical verification of ascending a height set.There is an urgent need to one kind to be not required at present for power industry
Personnel are wanted to ascend a height the high pressure electro-detection technology that can be detected, to make up the defect of this technology.
The patent document of Authorization Notice No. CN204882698U discloses a kind of with high-tension overhead line high-altitude electroscope function
Unmanned machine.The unmanned machine with high-tension overhead line high-altitude electroscope function, including electroscope, the electroscope tail end
It is fixed on telescopic rod front end, telescopic rod is connected with telescope motor, and telescope motor is installed in hanging frame body, frame body and stepping
The motor shaft of motor is connected, and stepper motor is installed at the top of unmanned plane, and electroscope is connected with camera by upright bar.The structure
It is disadvantageous in that：Since the contact of electroscope is column structure, it is not easy to realize and be steadily contacted with transmission line of electricity, influence to examine
Survey effect.
The patent document of application publication number CN106681347A discloses a kind of wireless electrical verification unmanned plane of controlled attitude type, packet
It includes：Unmanned plane, the wireless electroscope being arranged on the unmanned plane and electroscope orientation adjustment structure；The wireless electroscope
Including：Electric-field sensor, electroscope holder and the electrical verification controller being provided at its inner portion；The electroscope holder is fixed on institute
It states on the fuselage of unmanned plane；The electric-field sensor is fixed in the electroscope orientation adjustment structure, adjusts electric-field sensor
Stretching orientation and range, coordinate the flight attitude of the unmanned plane to adjust；The electric-field sensor and the electrical verification controller
It is connected；The electrical verification controller is connected with the flight controller of the unmanned plane, is communicated with unmanned aerial vehicle station.Although the structure
The flight attitude of unmanned plane can be adjusted, but in orientation adjustment structure self-regulating process, it may occur that centre-of gravity shift shows
As influencing the stability of unmanned plane during flying process, there are projecting risks；And in signal transmit process, anti-interference ability is not
By force, it is easy to the problem of signal interruption occurs.
Invention content
It is wirelessly touched based on double frequency two-way in view of this, in view of the deficiencies of the prior art, it is an object of the present invention to provide one kind
Hair transmission line of electricity electroscopic device is carried electroscopic device, is stepped on without personnel in the air using the aerial measuring device with electricity of double frequency double source
High operation reduces the danger of personnel, and secondly, double frequency double source ensure that the reliability of alarm signal triggering.
In order to achieve the above objectives, the present invention uses following technical scheme：
One kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, including aerial electrical verification system and ground monitoring system,
The aerial electrical verification system includes unmanned plane and the insulating bar on unmanned plane, setting electrical verification module on the insulating bar,
First central processing module, 315MHz wireless sending modules and 433MHz wireless sending modules, the ground monitoring system include
315MHz wireless receiving modules, the second central processing module, sound alarm module, 433MHz wireless receiving modules, third center
Processing module, light alarm module, the 315MHz wireless receiving modules, the second central processing module, sound alarm module according to
Secondary electrical connection, the 433MHz wireless receiving modules, third central processing module, light alarm module are sequentially connected electrically.
Further, the insulating bar also sets up described image acquisition module and image sending module, the ground monitoring
System further includes image receiver module, image display；The electrical verification module is fixed at the lower end of insulating bar；The figure
As acquisition module and image sending module are fixed at the middle part of insulating bar, described image acquisition module, image sending module,
Image receiver module and image display are sequentially connected electrically.
Further, multiple claw hooks are set on the metal detection contact of electrical verification module.
Further, the electrical verification module is 500kV high voltage testing modules, and described image sending module, image receive mould
Block passes for 5.8GHz high definition figures.
Further, the unmanned plane uses multi-rotor unmanned aerial vehicle, insulating bar to be mounted on more rotations by Hooke's joint
On the horizontal carbon pipe of wing unmanned plane, drawstring is set between the support arm and insulating bar of multi-rotor unmanned aerial vehicle.
The beneficial effects of the invention are as follows：
1. the present invention passes through the wireless receiving and dispatching of 315MHz, 433MHz double frequency double source in the air between electrical verification system and ground monitoring system
Device carries out signal transmission, and the second central processing module is sent to when 315MHz wireless receiving modules will receive signal, and second
Central processing module control sound alarm module is alarmed, when the signal received is sent to by 433MHz wireless receiving modules
Third central processing module, third central processing module control light alarm module is alarmed, using above-mentioned double frequency double source
Alarm mechanism reduces communication difficulty of the simple measurement data between power transmission line unmanned machine and ground installation, promotes measurement result
Intuitive.
2. the alarm triggering device of double frequency double source ensures the reliability of alarm signal transmission, meets State Grid Corp.
《Electric power safety working regulation（Circuit pack）》The regulation of standard：【3.3】Electrical verification【3.3.1】It is installed in dead line job site
Before ground wire, first electrical verification, identifies the true no-voltage of circuit.Electrical verification should use relevant voltage grade, qualified contact electroscope.
【3.3.3】Equipment to that can not carry out direct electrical verification can carry out indirect method of checking electricity, that is, check the machinery instruction of disconnecting switch disconnecting link
The variation that position, electrical instruction, instrument and the electric display device of point indicate, but should at least have two or more instructions or signal
Corresponding variation occurs；If being remotely controlled operation, the state instruction of disconnecting switch disconnecting link, telemetering, remote signals should be checked simultaneously
And the instruction of charged display device, carry out indirect method of checking electricity.
3. the present invention relies on unmanned aerial vehicle platform to carry high-altitude electrical verification system, when UAV flight's electrical verification module is flown to tested
After surveying high-voltage line overhead, electrical verification module is acquired by image capture module with the situation that circuit to be measured docks in real time, passes through figure
As sending module, image receiver module are sent to ground, image display provides real time information for ground control personnel, is convenient for
The state of flight of adjustment unmanned plane in time；
Electrical verification module is treated survey line road and is detected, and when circuit carries voltage, the first central processing module passes through control instruction
Second central processing module and the second central processing module, the second center are sent to by wireless sending module, wireless receiving module
Processing module and the second central processing module control sound alarm module and light alarm module work, remind operating personnel's circuit
Electrification；The alarm attonity if circuit no-voltage；
From the foregoing, it will be observed that electroscopic device through the invention, the step of eliminating artificial climbing tower, efficiency is improved, while reducing height
The risk that sky falls, gets an electric shock.
4. multiple claw hooks are arranged on the metal detection contact of electrical verification module, circuit to be measured is quickly hooked on convenient for the present invention
On, the difficulty of unmanned plane aerial work is reduced, operating efficiency is improved.
5. the present invention uses electrical verification module for 500kV high voltage testing modules, there is professional standard and reliability；Image
Sending module, image receiver module pass for 5.8GHz high definition figures, are powered using 12V power-supply systems, have strong antijamming capability, pass
The advantages of defeated distance is remote, image high-resolution.
6. unmanned plane uses multi-rotor unmanned aerial vehicle, which has the characteristics that heavy burden ability is strong, flight stability, carries and insulate
Bar and the flight detection of other electric elements, stability are strong.
Description of the drawings
Fig. 1 is the structural schematic diagram of one aerial electrical verification system of embodiment；
Fig. 2 is the structural schematic diagram of embodiment one；
Fig. 3 is the functional block diagram of embodiment one；
Fig. 4 is the functional block diagram of embodiment two.
Figure label：1- unmanned planes, 2- insulating bars, 3- image capture modules, 4- image sending modules, 5- electrical verification modules,
The first central processing modules of 6-, 7-315MHz wireless sending modules, 8-433MHz wireless sending modules, 9- image receiver modules,
10- image displays, 11-315MHz wireless receiving modules, the second central processing modules of 12-, 13- sound alarm modules, 14-
433MHz wireless receiving modules, 15- third central processing modules, 16- light alarm modules, 17- claw hooks, 18- signal condition moulds
Block, 19- Hooke's joints, 20- support arms, 21- drawstrings.
Specific implementation mode
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment one
As shown in Figure 1 to Figure 3, the present invention includes aerial electrical verification system and ground monitoring system, and aerial electrical verification system includes for nobody
Machine 1 and insulating bar 2, unmanned plane 1 use six rotor wing unmanned aerial vehicles, insulating bar 2 by Hooke's joint 19 be mounted on six rotors without
On man-machine horizontal carbon pipe, on the one hand which is convenient for the quick electrical verification of insulating bar 2, insulating bar 2 on the other hand may be implemented
It is front and back convertible hinged, avoid insulating bar 2 from influencing the lifting process of unmanned plane, support arm 20 and the insulating bar 2 of six rotor wing unmanned aerial vehicles
Between be arranged two drawstrings 21, composition pyramidal structure is enclosed between two drawstrings 21 and insulating bar 2, for preventing insulating bar 2 or so
It waves；
On insulating bar 2 be arranged image capture module 3, image sending module 4, electrical verification module 5, the first central processing module 6,
315MHz wireless sending modules 7 and 433MHz wireless sending modules 8, ground monitoring system include that image receiver module 9, image are aobvious
Show that module 10,315MHz wireless receiving modules 11, the second central processing module 12, sound alarm module 13,433MHz wirelessly connect
Receive module 14, third central processing module 15, light alarm module 16,315MHz wireless receiving modules 11, the second central processing
Module 12, sound alarm module 13 are sequentially connected electrically, 433MHz wireless receiving modules 14, third central processing module 15, light
Alarm module 16 is sequentially connected electrically；
Electrical verification module 5 uses 500kV high-voltage capacitance formula capacitors, is fixed at the lower end of insulating bar 2, the gold of electrical verification module 5
Belong to and multiple claw hooks 17 are set on detection contact；Image capture module 3 and image sending module 4 are fixed in insulating bar 2
Portion, image capture module 3, image sending module 4, image receiver module 9 and image display 10 are sequentially connected electrically, image hair
It is that the 5.8GHz high definition figures being mutually paired pass to send module 4, image receiver module 5.
Device can use as follows：
First, the insulating bar for installing electric elements is fixed on to the side of unmanned plane 1, chooses target line, sets up ground
Face monitoring device, ground monitoring device can with no-manned machine distant control system individually or Integrated design, the present embodiment use list
Solely setting, aerial work system and ground monitoring system are all made of power module and are powered；
Then, image transmission system, wireless transceiver system, alarm system are debugged, checks that the lens location of figure biography acquisition module whether can
Enough contact situations that claw hook is seen in ground surface end；
Finally, flight path is made, electrical verification operation is carried out.
After UAV flight's electrical verification module is flown to detected high-voltage line overhead, image capture module by electrical verification module with
The situation that circuit to be measured docks in real time is acquired, and is sent to ground by image sending module, image receiver module, image is aobvious
Show that module provides real time information for ground control personnel, convenient for the state of flight of adjustment unmanned plane in time；
Electrical verification module is treated survey line road and is detected, and when circuit carries voltage, the first central processing module passes through control instruction
Second central processing module and the second central processing module, the second center are sent to by wireless sending module, wireless receiving module
Processing module and the second central processing module control sound alarm module and light alarm module work, remind operating personnel's circuit
Electrification；The alarm attonity if circuit no-voltage.
Embodiment two
As depicted in figs. 1 and 2, the present invention includes aerial electrical verification system and ground monitoring system, and aerial electrical verification system includes for nobody
Machine 1 and the insulating bar 2 on unmanned plane 1, unmanned plane 1 use multi-rotor unmanned aerial vehicle, Image Acquisition mould are arranged on insulating bar 2
Block 3, image sending module 4, electrical verification module 5, Signal-regulated kinase 18, the first central processing module 6,315MHz transmit wirelessly mould
Block 7 and 433MHz wireless sending modules 8, ground monitoring system include image receiver module 9, image display 10,315MHz
In wireless receiving module 11, the second central processing module 12, sound alarm module 13,433MHz wireless receiving modules 14, third
Entreat processing module 15, light alarm module 16,315MHz wireless receiving modules 11, the second central processing module 12, audible alarm
Module 13 is sequentially connected electrically, and 433MHz wireless receiving modules 14, third central processing module 15, light alarm module 16 are electric successively
Connection；
Electrical verification module 5 uses 500kV high-voltage capacitance formula capacitors, is fixed at the lower end of insulating bar 2, the gold of electrical verification module 5
Belong to and multiple claw hooks 17 are set on detection contact；Image capture module 3 and image sending module 4 are fixed in insulating bar 2
Portion, image capture module 3, image sending module 4, image receiver module 9 and image display 10 are sequentially connected electrically, image hair
It is that the 5.8GHz high definition figures being mutually paired pass to send module 4, image receiver module 5.
The present embodiment and the structure of embodiment one are essentially identical, unlike：As shown in figure 4, in electrical verification module 5 and first
Setting signal conditioning module 18 between central processing module 6, Signal-regulated kinase 14 include the amplifying circuit mould being sequentially connected electrically
Block and A/D conversion circuit modules.Signal-regulated kinase is added, the intensity of electrical verification signal can be effectively enhanced, prevents overhead transmission line electric
Interference of the magnetic disturbance to signal.
Finally illustrate, the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, this field is common
Other modifications or equivalent replacement that technical staff makes technical scheme of the present invention, without departing from technical solution of the present invention
Spirit and scope, be intended to be within the scope of the claims of the invention.
Claims (5)
1. one kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, including aerial electrical verification system and ground monitoring system
System, the aerial electrical verification system includes unmanned plane and the insulating bar on unmanned plane, it is characterised in that：On the insulating bar
Electrical verification module, the first central processing module, 315MHz wireless sending modules and 433MHz wireless sending modules, the ground are set
Monitoring system includes 315MHz wireless receiving modules, the second central processing module, sound alarm module, 433MHz wireless receiving moulds
Block, third central processing module, light alarm module, the 315MHz wireless receiving modules, the second central processing module, sound
Alarm module is sequentially connected electrically, and the 433MHz wireless receiving modules, third central processing module, light alarm module are electric successively
Connection.
2. according to claim 1 a kind of based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, it is characterised in that：
The insulating bar also sets up described image acquisition module and image sending module, and the ground monitoring system further includes that image receives
Module, image display；The electrical verification module is fixed at the lower end of insulating bar；Described image acquisition module and image hair
The middle part for sending module to be fixed at insulating bar, described image acquisition module, image sending module, image receiver module and image
Display module is sequentially connected electrically.
3. according to claim 2 a kind of based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, it is characterised in that：
Multiple claw hooks are set on the metal detection contact of electrical verification module.
4. according to claim 1 a kind of based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, it is characterised in that：
The electrical verification module is 500kV high voltage testing modules, and described image sending module, image receiver module are 5.8GHz high definition figures
It passes.
5. according to claim 1 a kind of based on double frequency two-way wireless trigger transmission line of electricity electroscopic device, it is characterised in that：
The unmanned plane uses multi-rotor unmanned aerial vehicle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810320883.2A CN108519507A (en) | 2018-04-11 | 2018-04-11 | One kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device |
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| CN201810320883.2A CN108519507A (en) | 2018-04-11 | 2018-04-11 | One kind being based on double frequency two-way wireless trigger transmission line of electricity electroscopic device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270329A (en) * | 2018-11-13 | 2019-01-25 | 天津送变电工程有限公司 | A kind of contact electrical verification system and its working method based on unmanned plane |
| CN109521257A (en) * | 2019-01-30 | 2019-03-26 | 云南电网有限责任公司电力科学研究院 | A kind of the voltage class identifying system and method for high voltage ac/dc power transmission line |
| CN109946503A (en) * | 2019-03-28 | 2019-06-28 | 国网辽宁省电力有限公司丹东供电公司 | Unmanned plane high voltage testing device |
| CN110376422A (en) * | 2019-08-30 | 2019-10-25 | 云南电网有限责任公司电力科学研究院 | A kind of electroscopic device and electricity-testing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202586950U (en) * | 2012-03-22 | 2012-12-05 | 深圳市欧瑞博电子有限公司 | Wireless double-frequency transmit-receive apparatus |
| CN104181377A (en) * | 2014-08-27 | 2014-12-03 | 李明明 | High-voltage ultra-small unmanned electroscope |
| CN204008821U (en) * | 2014-07-02 | 2014-12-10 | 陕西华赢智能科技有限公司 | 500kv super-high voltage Micro Aerial Vehicle electrical verification system |
| CN204028212U (en) * | 2014-08-27 | 2014-12-17 | 李明明 | 220kV-1000kV capacitance-voltage-distributing type unmanned plane electroscopic device |
| CN106681347A (en) * | 2016-12-30 | 2017-05-17 | 易瓦特科技股份公司 | Gesture controllable wireless charge detecting UAV |
| US20170285091A1 (en) * | 2016-03-29 | 2017-10-05 | National Taiwan University | Sensing circuit, sensing device and monitoring system for power transmission lines |
-
2018
- 2018-04-11 CN CN201810320883.2A patent/CN108519507A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202586950U (en) * | 2012-03-22 | 2012-12-05 | 深圳市欧瑞博电子有限公司 | Wireless double-frequency transmit-receive apparatus |
| CN204008821U (en) * | 2014-07-02 | 2014-12-10 | 陕西华赢智能科技有限公司 | 500kv super-high voltage Micro Aerial Vehicle electrical verification system |
| CN104181377A (en) * | 2014-08-27 | 2014-12-03 | 李明明 | High-voltage ultra-small unmanned electroscope |
| CN204028212U (en) * | 2014-08-27 | 2014-12-17 | 李明明 | 220kV-1000kV capacitance-voltage-distributing type unmanned plane electroscopic device |
| US20170285091A1 (en) * | 2016-03-29 | 2017-10-05 | National Taiwan University | Sensing circuit, sensing device and monitoring system for power transmission lines |
| CN106681347A (en) * | 2016-12-30 | 2017-05-17 | 易瓦特科技股份公司 | Gesture controllable wireless charge detecting UAV |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270329A (en) * | 2018-11-13 | 2019-01-25 | 天津送变电工程有限公司 | A kind of contact electrical verification system and its working method based on unmanned plane |
| CN109521257A (en) * | 2019-01-30 | 2019-03-26 | 云南电网有限责任公司电力科学研究院 | A kind of the voltage class identifying system and method for high voltage ac/dc power transmission line |
| CN109521257B (en) * | 2019-01-30 | 2020-11-27 | 云南电网有限责任公司电力科学研究院 | Voltage grade identification system and method for high-voltage alternating current and direct current transmission line |
| CN109946503A (en) * | 2019-03-28 | 2019-06-28 | 国网辽宁省电力有限公司丹东供电公司 | Unmanned plane high voltage testing device |
| CN110376422A (en) * | 2019-08-30 | 2019-10-25 | 云南电网有限责任公司电力科学研究院 | A kind of electroscopic device and electricity-testing method |
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