CN106226617A - The intelligent lightning protection system of auto-alarming - Google Patents
The intelligent lightning protection system of auto-alarming Download PDFInfo
- Publication number
- CN106226617A CN106226617A CN201610548999.2A CN201610548999A CN106226617A CN 106226617 A CN106226617 A CN 106226617A CN 201610548999 A CN201610548999 A CN 201610548999A CN 106226617 A CN106226617 A CN 106226617A
- Authority
- CN
- China
- Prior art keywords
- fault message
- auto
- alarming
- fault
- lightning arrester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V8/00—Prospecting or detecting by optical means
- G01V8/10—Detecting, e.g. by using light barriers
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
- H02G13/60—Detecting; Measuring; Sensing; Testing; Simulating
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
Abstract
The intelligent lightning protection system of the auto-alarming that the present invention provides, including: it is arranged on the lightning arrester on described power circuit, failure detector, fault message auto-alarming terminal and remote console, described failure detector is for detecting the fault message of described lightning arrester, and described fault message is sent to described fault message auto-alarming terminal, fault message described in described fault message auto-alarming terminal storage, and described fault message is sent to described remote console by wireless network, described remote console alerts according to the described fault message received.The present invention provides the intelligent lightning protection system of a kind of auto-alarming, monitors the duty of lightning arrester in real time, when damaging, sends alarm in time, it is to avoid the lightning strike accident that lightning arrester inefficacy causes.
Description
Technical field
The present invention relates to lightning arrester, particularly to a kind of intelligent lightning protection system being arranged on power circuit, can be real-time
Monitoring surge arrester failure, and auto-alarming.
Background technology
Atmosphere produces negative thundercloud during flowing, along with the accumulation of negative charge in negative thundercloud, its electric field intensity by
Cumulative add, when reaching to a certain degree, i.e. start ladder-type downwards and jump electric discharge, referred to as descending leader electric discharge.When under this
When row guide moves closer to ground object and reaches certain distance, ground object produces point discharge under highfield effect, and
Forming upward leader, and develop towards descending leader direction, both i.e. define lightning channel after joining, and are the formation of thunder therewith
Electricity.It is generally believed that when thunder and lightning descending leader develops downwards from thundercloud, its ladder-type jumps only to be affected by ambient atmosphere,
The target that neither one determines.Only when completing last ladder-type and jumping, it just must select one and be hit object.Cause
This, can install arrester on protected object, makes upward leader and descending leader join, to avoid thunderbolt.
Arrester is exactly the metal object being specifically used to accept thunder and lightning.The metallic rod connecing sudden strain of a muscle is referred to as discharging rod, connects the gold of sudden strain of a muscle
Belong to line and be referred to as lightning conducter, connect the metal tape of sudden strain of a muscle, wire netting is referred to as lighting proof strip, lightning conduction.Discharging rod exceeds protected object, again and greatly
Be joined directly together, when lightning leader close to time, between it and thundercloud, electric field intensity is maximum, thus can be inhaled by the passage of thundercloud discharge
Guide to discharging rod itself, and with grounding device, lightning current is released in the earth safely through downlead, make protected object body
From direct stroke.
Owing to outdoor transmission line of electricity generally sets up in high-altitude, easily become the object that hit of thunder and lightning, thus built on stilts defeated
Generally equipped with overlapping lightning arrester in electric line more.But, after lightning arrester damages, lightning-arrest effect can be lost, as can not be timely
Find the lightning arrester of fault, easily make circuit be struck by lightning, cause large-area power-cuts.
Summary of the invention
For defect of the prior art, the present invention provides the intelligent lightning protection system of a kind of auto-alarming, and monitoring in real time keeps away
The duty of thunder device, when damaging, sends alarm in time, it is to avoid the lightning strike accident that lightning arrester inefficacy causes.
The intelligent lightning protection system of the auto-alarming that the present invention provides, including: the lightning-arrest dress being arranged on described power circuit
Put, failure detector, fault message auto-alarming terminal and remote console, described failure detector is used for detecting described
The fault message of lightning arrester, and described fault message is sent to described fault message auto-alarming terminal, described fault is believed
Fault message described in breath auto-alarming terminal storage, and described fault message is sent to described long-range control by wireless network
Platform, described remote console alerts according to the described fault message received;
Described lightning arrester includes: locating rack and the drop-type arrester being arranged on described locating rack, described drop type
The lightning arrester body that when spark gap includes support and fault, automatic turning falls;
Described failure detector includes: for obtaining the camera head of described lightning arrester photo;
Described fault message auto-alarming terminal includes: breakdown judge unit, fault message memory element and fault message
Transmitting element, described breakdown judge unit is connected with described camera head, obtains in real time the photo of described lightning arrester, and with in advance
The failure criterion figure deposited contrasts, if the photo obtained and the similarity arrival setting threshold value of failure criterion figure, then judges
Described lightning arrester fault, and by fault information generation unit, described fault message and fault location information are sent to remotely
Control station, stores described fault message in described fault message memory element simultaneously;
Described remote console receives described fault message and fault location information, alerts.
The intelligent lightning protection system of the auto-alarming that the present invention provides, utilizes camera head to obtain described lightning arrester in real time
Photo, and contrast with the failure criterion figure prestored, set if the similarity of the photo obtained and failure criterion figure arrives
Threshold value, then judge described lightning arrester malfunction and failure, and by fault message auto-alarming terminal by fault message and fault bit
Confidence breath is sent to remote console, carries out fault warning.By native system, the operator being positioned at remote console can be
One time obtained fault message and abort situation, arranged maintainer quickly to keep in repair, it is to avoid led owing to lightning arrester loses efficacy
The power system caused damages, and causes heavy losses.
Further, described lightning arrester is multiple, and each described lightning arrester is correspondingly arranged on a fault detect dress
Put.
Further, described lightning arrester is multiple, and described failure detector also includes that turntable, described camera head set
Put on described turntable, and rotate with described turntable, one by one multiple described lightning arresters are carried out fault detect.
Further, described turntable includes underframe, horizontally rotates the driving electricity horizontally rotating portion's action described in portion and driving
Machine, described in horizontally rotate portion and be connected with described underframe by the rotating shaft that is vertically arranged.
Further, described turntable also includes a vertical rotation section, described vertical rotation section be arranged on described in horizontally rotate
In portion, and described camera head is arranged on described vertical rotation section.
Further, described fault message auto-alarming terminal is additionally provided with positioner.
Further, described fault message auto-alarming terminal includes housing and pcb board, first peace of described pcb board
Equipped with electronic component, second be provided above cooling line, this cooling line connects with cooling gas generating unit, electricity
Movable valve is arranged on described cooling line, and the opening of electrically operated valve is towards described electronic component and makes the cooling air-flow sprayed
Just to electronic component;The opening part of electrically operated valve is additionally provided with the valve plate being perpendicular to cool down air-flow, and valve plate one end is resisted against on spring,
The other end is connected on the opening of electrically operated valve;Described spring housing is located on sliding axle, and sliding axle one end is fixing with valve plate to be connected,
The other end is fixed on spring support, and this spring support is fixing with cooling line to be connected;Described valve plate is also fixedly connected with coil
Fixing body, this coil fixing body is provided with coil, and this coil is positioned in magnetic field and is series in the circuit loop of pcb board;When
During coil no power in circuit loop, spring extruding valve plate makes the opening of this electrically operated valve be normally off, when circuit returns
During coil electricity in road, electrified coil promotes valve plate extrusion spring under the effect of Lorentz force so that opening of electrically operated valve
Mouth is opened, cooling air-flow ejection;When the power of circuit loop is the biggest, the electric current in coil is the biggest, the Lip river logical sequence that coil is subject to
Hereby power is the biggest, thus increases the valve plate extruding amplitude to spring, improves opening air output.
When using gas produced by the cooling gas or cooling gas generating unit introduced from the external world, pass through pipeline
Import to by the electronic component of heating, it is possible to use temperature lower, not by cooling that other electronic component is heated
Cooling down these electronic components with gas, cooling effect is more preferable, and rate of cooling faster, is beneficial to realize electronic component
Temperature maintain in lower level.And, by by coils connected in series to circuit board in order in the circuit of connecting electronic component,
When electronic component more needs to dispel the heat, and all thermal powers produced by it, derive from electrical power, and electrical power is the biggest, its electricity
Flow the biggest, so coil can produce bigger active force, to resist elastic force produced by spring.Bigger when producing
Elastic force time, its elastic deformation is the biggest so that the opening of electrically operated valve is the biggest, and the flow of the cooling gas that it can pass through is also
The biggest, cooling capacity is the strongest.It is achieved thereby that the different cooling effects of the electronic component for different operating temperature, or for
Same electronic component, the different cooling effects when different temperatures, thus improve cooling gas input device or cooling use
The gas generating unit work efficiency when importing equal number cooling gas, improves cooling capacity.
Preferably, described cooling gas generating unit stores liquid nitrogen.
The mode using liquid nitrogen cools down, and not only gas temperature is the lowest, and cooling capacity is strong, and it is cold to produce air
But the dust in pollutes electronical elements surface, the problem reducing electronic element radiating ability.
Accompanying drawing explanation
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to specifically
In embodiment or description of the prior art, the required accompanying drawing used is briefly described.In all of the figs, similar element
Or part is typically by the reference mark being similar to.In accompanying drawing, each element or part might not be drawn according to actual ratio.
The structural representation of the intelligent lightning protection system of the auto-alarming that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is the structural representation of the fault message auto-alarming terminal in one embodiment of the invention with cooling function.
Detailed description of the invention
Below in conjunction with accompanying drawing, the embodiment of technical solution of the present invention is described in detail.Following example are only used for
Technical scheme is clearly described, is therefore only used as example, and the protection model of the present invention can not be limited with this
Enclose.
It should be noted that except as otherwise noted, technical term used in this application or scientific terminology should be this
The ordinary meaning that bright one of ordinary skill in the art are understood.
Drop-type arrester adds disconnector, when abnormal breaking down occurs in spark gap, utilizes power frequency short circuit current
Allowing disconnector action, make disconnector earth terminal automatically disengage, unit of an arrester turns over, and Accident prevention progress out of service expands,
And the person of being easily maintained finds to safeguard and change in time.It turns over principle and is similar to fuse, and fuse failure causes fusion tube to turn over,
Having quick action, action current scope is wide, is resistant to again rated current impact and the advantage of operating duty.Inventor finds
During drop-type arrester fault, spark gap turns over backward image and is clearly distinguished from the existence of normal spark gap image.Can be by right
Carry out judging whether fault than standard photographs.
Reference Fig. 1, the intelligent lightning protection system of the auto-alarming that one embodiment of the invention provides, including: described electric power is set
Lightning arrester 100, failure detector 200, fault message auto-alarming terminal 300 and remote console 400, institute on circuit
State failure detector 200 for detecting the fault message of described lightning arrester 100, and described fault message is sent to described
Fault message auto-alarming terminal 300, described fault message auto-alarming terminal 300 stores described fault message, and by described
Fault message is sent to described remote console 400 by wireless network, and described remote console 400 is according to described in receiving
Fault message alerts;
Described lightning arrester 100 includes: locating rack and the drop-type arrester being arranged on described locating rack, described in fall
The lightning arrester body that when formula spark gap includes support and fault, automatic turning falls;
Described failure detector 200 includes: for obtaining the camera head of described lightning arrester photo;
Described fault message auto-alarming terminal 300 includes: breakdown judge unit, fault message memory element and fault letter
Breath transmitting element, described breakdown judge unit is connected with described camera head, in real time the photo of the described lightning arrester of acquisition, and with
The failure criterion figure prestored contrasts, if the photo obtained and the similarity arrival setting threshold value of failure criterion figure, then sentences
Disconnected described lightning arrester fault, and by fault information generation unit, described fault message and fault location information are sent to far
Process control platform, stores described fault message in described fault message memory element simultaneously;
Described remote console 400 receives described fault message and fault location information, alerts.
Wherein, described lightning arrester 100 is multiple, and described failure detector 200 may also include turntable, and described shooting fills
Put and be arranged on described turntable, and rotate with described turntable, one by one multiple lightning arresters 100 are carried out fault detect.Should manage
Solving, each described lightning arrester 100 also can be correspondingly arranged on a failure detector 200 respectively.
The intelligent lightning protection system of the auto-alarming that the present invention provides, utilizes camera head to obtain described lightning arrester in real time
Photo, and contrast with the failure criterion figure prestored, set if the similarity of the photo obtained and failure criterion figure arrives
Threshold value, then judge described lightning arrester malfunction and failure, and by fault message auto-alarming terminal 300 by fault message and fault
Positional information is sent to remote console 400, carries out fault warning.By native system, it is positioned at the operator of remote console 400
Member can obtain fault message and abort situation in the very first time, arranges maintainer quickly to keep in repair, it is to avoid due to lightning-arrest dress
Put the power system damage that 100 inefficacies cause, cause heavy losses.
Fig. 2 is the structural representation of the fault message alarm terminal with refrigerating function of the embodiment of the present invention 2;
In figure, the implication that each reference represents is as follows;1, housing;2, pcb board;
11, cooling fan;12, defecator;13, cooling line;14, sliding axle;15, valve plate;16, gas outlet;17, line
Circle;19, spring support;20, exhaust outlet;21, coil fixing body;22, electronic component;23, spring.
In prior art, it is utilized in the sidewall opening of electrical equipment more, extraneous cooler air is introduced or by casing for electric appliances
The mode that interior relatively warm air is discharged cools down, or housing entirety is cooled down so that be heated at electronic component
Gas is met cold after touching housing, passed by heat, is back at electronic component after cooling again.In this type of cooling, need
The system of factor to be cooled is put in the position that gas flowing in housing to carry out integral arrangement, even electronic component
About.And, it is important to, to adopt in this way, the temperature in housing cannot decrease too low, and cools down the gas of a lot of electronic component
Be into the heated gas of other electronic components, such as, with the gas of seventy or eighty degrees Celsius, go to cool down those temperature
Degree is 100 degrees Celsius, these elements must not be cooled to five or six ten degrees Celsius, so the operating temperature of electronic component
Also cannot significantly reduce.
The fault message auto-alarming terminal of the present embodiment includes housing 1 and pcb board 2, and first of pcb board 2 is upper to install
Having electronic component 22, pcb board is provided with the electronic circuit for electrically connecting electronic component 22, and electronic circuit is in series with electrodynamic valve
The coil 17 of door, coil 17 is set on the coil fixing body 21 being connected fixing with valve plate 15, when coil 17 is moved, line
Circle fixing body 21 also can drive valve plate 15 to be moved, and coil 17 is arranged in magnetic field, and the direction in magnetic field is represented by ⊙ in the drawings,
Magnetic field can be produced by U magnet, and magnetic field is for controlling valve core movement to change the openings of sizes of electrically operated valve, the magnetic in magnetic field
It is axial that sense line is perpendicular to coil, and the opening part of electrically operated valve is provided with the spring 23 being connected with valve plate 15, and spring 23 is set in cunning
On moving axis 14, sliding axle 14 is also fixing with valve plate 15 to be connected, and the other end of spring 23 is against and is fixedly mounted on cooling line 13
Spring support 19 on, spring 23 is for promoting valve plate 15 to close the opening of electrically operated valve, and electrically operated valve is arranged on cooling tube
On road 13, gas outlet 16 setting direction of electrically operated valve is so that the air-flow sprayed by opening sprays towards electronic component 22, cold
But pipeline 13 is positioned at second side of pcb board 2, and second is the reverse side of first, and cooling line 13 is defeated with cooling gas
Enter device or cooling gas generating unit connects.
Wherein the air inlet of cooling line 13 uses the mode from housing external admission, particularly, by cooling gas inlet
Device air inlet, through defecator 12, then has cooling fan 11 to be blown in cooling line 13.
When using gas produced by the cooling gas or cooling gas generating unit introduced from the external world, pass through pipeline
The electronic component 22 importing to heating is other, it is possible to use temperature lower, the most heated by other electronic component 22
These electronic components 22 are cooled down by cooling gas, and cooling effect is more preferable, and rate of cooling faster, is beneficial to realize electricity
The temperature of sub-element 22 maintains in lower level.And, by coil 17 being connected in series to circuit board in order to connect electronics unit
In the circuit of part 22, when electronic component 22 more needs to dispel the heat, and all thermal powers produced by it, derive from electrical power, and
Electrical power is the biggest, and its electric current is the biggest, so coil 17 can produce bigger active force, band moving winding fixing body 21 and valve
The plate 15 right side in figure is moved, to resist elastic force produced by spring 23.When bigger elastic force can be produced, its elastic shape
Becoming the biggest so that the opening of electrically operated valve is the biggest, the flow of the cooling gas that it can pass through is the biggest, and cooling capacity is more
By force.It is achieved thereby that the different cooling effects of the electronic component 22 for different operating temperature, or for same electronic component 22,
Different cooling effects when different temperatures, thus improve cooling gas input device or cooling gas generating unit exists
Import work efficiency during equal number cooling gas, improve cooling capacity.
In the description of the present application, it is to be understood that term " on ", D score, "front", "rear", "left", "right", " water
Flat ", the orientation that indicates of " interior ", " outward " etc. or position relationship be based on orientation shown in the drawings or position relationship, merely to just
In describe the present invention and simplifying describe rather than instruction or the hint device of indication or element must have specific orientation, with
Specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " etc. are only used for describing purpose, and it is not intended that indicate or imply relatively important
Property or the implicit quantity indicating indicated technical characteristic.In describing the invention, " multiple " are meant that two or more,
Unless otherwise expressly limited specifically.
In the description of the present invention, illustrate a large amount of detail.It is to be appreciated, however, that embodiments of the invention are permissible
Put into practice in the case of there is no these details.In some instances, it is not shown specifically known method, structure and skill
Art, in order to do not obscure the understanding of this description.
In the description of this specification, specific features, structure, material or feature can be with one or more embodiments in office
Or example combines in an appropriate manner.Additionally, in the case of the most conflicting, those skilled in the art can be by this theory
Different embodiments or the feature of example and different embodiment or example described in bright book are combined and combine.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit;To the greatest extent
The present invention has been described in detail by pipe with reference to foregoing embodiments, it will be understood by those within the art that: it depends on
So the technical scheme described in foregoing embodiments can be modified, or the most some or all of technical characteristic is entered
Row equivalent;And these amendments or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme, it all should be contained in the middle of the claim of the present invention and the scope of description.
Claims (7)
1. the intelligent lightning protection system of an auto-alarming, it is characterised in that including: the lightning-arrest dress being arranged on described power circuit
Put, failure detector, fault message auto-alarming terminal and remote console, described failure detector is used for detecting described
The fault message of lightning arrester, and described fault message is sent to described fault message auto-alarming terminal, described fault is believed
Fault message described in breath auto-alarming terminal storage, and described fault message is sent to described long-range control by wireless network
Platform, described remote console alerts according to the described fault message received;
Described lightning arrester includes: locating rack and the drop-type arrester being arranged on described locating rack, and described drop type is taken shelter from the thunder
The lightning arrester body that when device includes support and fault, automatic turning falls;
Described failure detector includes: for obtaining the camera head of described lightning arrester photo;
Described fault message auto-alarming terminal includes: breakdown judge unit, fault message memory element and fault message send
Unit, described breakdown judge unit is connected with described camera head, obtain in real time the photo of described lightning arrester, and with prestore
Failure criterion figure contrasts, if the photo obtained and the similarity arrival setting threshold value of failure criterion figure, then judges described
Lightning arrester fault, and be sent to remotely control by described fault message and fault location information by fault information generation unit
Platform, stores described fault message in described fault message memory element simultaneously;
Described remote console receives described fault message and fault location information, alerts.
The intelligent lightning protection system of auto-alarming the most according to claim 1, it is characterised in that described lightning arrester is many
Individual, each described lightning arrester is correspondingly arranged on a failure detector.
The intelligent lightning protection system of auto-alarming the most according to claim 1, it is characterised in that described lightning arrester is many
Individual, described failure detector also includes that turntable, described camera head are arranged on described turntable, and rotates with described turntable,
One by one multiple described lightning arresters are carried out fault detect.
The intelligent lightning protection system of auto-alarming the most according to claim 3, it is characterised in that described turntable include underframe,
Horizontally rotate portion and horizontally rotate the driving motor of portion's action described in driving, described in horizontally rotate portion by the rotating shaft being vertically arranged
It is connected with described underframe.
The intelligent lightning protection system of auto-alarming the most according to claim 4, it is characterised in that described turntable also includes that one erects
Straight rotation section, described vertical rotation section be arranged on described in horizontally rotate in portion, and described camera head is arranged on described vertical turn
In dynamic portion.
The intelligent lightning protection system of auto-alarming the most according to claim 1, it is characterised in that described fault message is accused automatically
Alert terminal is additionally provided with positioner.
The intelligent lightning protection system of auto-alarming the most according to claim 1, it is characterised in that described fault message is accused automatically
Alert terminal includes housing and pcb board, and the first face of described pcb board is provided with electronic component, second be provided above cooling
Pipeline, this cooling line connects with cooling gas generating unit, and electrically operated valve is arranged on described cooling line, electrically operated valve
Opening towards described electronic component and make ejection cooling air-flow just to electronic component;The opening part of electrically operated valve is additionally provided with
Being perpendicular to cool down the valve plate of air-flow, valve plate one end is resisted against on spring, and the other end is connected on the opening of electrically operated valve;Described bullet
Spring is set on sliding axle, and sliding axle one end and valve plate are fixing to be connected, and the other end is fixed on spring support, this spring support and
Cooling line is fixing to be connected;Described valve plate is also fixedly connected with coil fixing body, this coil fixing body is provided with coil, this line
Circle is positioned in magnetic field and is series in the circuit loop of pcb board;When coil no power in circuit loop, spring extruding valve plate
The opening making this electrically operated valve is normally off, and when coil electricity in circuit loop, electrified coil is in Lorentz force
Effect is lower promotes valve plate extrusion spring so that the opening of electrically operated valve is opened, cooling air-flow ejection;Power when circuit loop
Time the biggest, the electric current in coil is the biggest, and the Lorentz force that coil is subject to is the biggest, thus increases the valve plate extruding width to spring
Degree, improves opening air output.
Priority Applications (1)
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CN201610548999.2A CN106226617A (en) | 2016-07-13 | 2016-07-13 | The intelligent lightning protection system of auto-alarming |
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CN201610548999.2A CN106226617A (en) | 2016-07-13 | 2016-07-13 | The intelligent lightning protection system of auto-alarming |
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CN201610548999.2A Pending CN106226617A (en) | 2016-07-13 | 2016-07-13 | The intelligent lightning protection system of auto-alarming |
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Citations (5)
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CN101127143A (en) * | 2007-03-12 | 2008-02-20 | 宝鸡市公安局交通警察支队 | Automatic tracking display system for warn |
CN203237177U (en) * | 2013-03-26 | 2013-10-16 | 付瑞明 | Remote monitoring device of automobile |
CN105139987A (en) * | 2015-08-26 | 2015-12-09 | 芜湖市凯鑫避雷器有限责任公司 | Automatic alarm drop type arrester |
CN205244560U (en) * | 2015-12-11 | 2016-05-18 | 南车株洲电机有限公司 | Electric machine cooling controllable valve that ventilates |
CN105716347A (en) * | 2014-12-03 | 2016-06-29 | 中国航空工业集团公司航空动力控制系统研究所 | Liquid nitrogen low-temperature box |
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CN101127143A (en) * | 2007-03-12 | 2008-02-20 | 宝鸡市公安局交通警察支队 | Automatic tracking display system for warn |
CN203237177U (en) * | 2013-03-26 | 2013-10-16 | 付瑞明 | Remote monitoring device of automobile |
CN105716347A (en) * | 2014-12-03 | 2016-06-29 | 中国航空工业集团公司航空动力控制系统研究所 | Liquid nitrogen low-temperature box |
CN105139987A (en) * | 2015-08-26 | 2015-12-09 | 芜湖市凯鑫避雷器有限责任公司 | Automatic alarm drop type arrester |
CN205244560U (en) * | 2015-12-11 | 2016-05-18 | 南车株洲电机有限公司 | Electric machine cooling controllable valve that ventilates |
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Application publication date: 20161214 |