CN102332715A - Multipurpose signal lightning-protection method and multipurpose signal lightning-protection device - Google Patents
Multipurpose signal lightning-protection method and multipurpose signal lightning-protection device Download PDFInfo
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- CN102332715A CN102332715A CN201110292158A CN201110292158A CN102332715A CN 102332715 A CN102332715 A CN 102332715A CN 201110292158 A CN201110292158 A CN 201110292158A CN 201110292158 A CN201110292158 A CN 201110292158A CN 102332715 A CN102332715 A CN 102332715A
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Abstract
The invention discloses a multipurpose signal lightning-protection method and a multipurpose signal lightning-protection device. The lightning-protection device comprises a shell, grounding components, lightning-protection circuit components, a plurality of interface inserting pieces, a cover plate, an installing card and a spring, wherein the grounding components comprise a screw, a wiring terminal main unit and a line pressing frame; and the lightning-protection circuit components comprise circuit boards on which lightning-protection components are arranged and interface components. The lightning-protection device has the universality that: according to lightning-protection purposes, only the required lightning-protection component is needed to be arranged in the shell of the lightning-protection device and then is matched with an appropriate interface inserting piece, so that different lightning-protection functions can be achieved, and thus a multipurpose die is realized; and in addition, according to engineering needs, the lighting-protection devices with different functions are combined together to form an integral all-in-one lightning-protection device.
Description
Technical field
The invention belongs to the signal lighting protection technical field; A kind of multipurpose siganl thunder-proof device that is specifically related to a kind of multipurpose signal lighting protection method and obtains according to this method; Through implementing this method; Arbitrary lightning protection circuit assembly that adapts with housing can be installed in same lightning protection device housing, be suitable for multiple various signals interface, realize one module multiple usages.
Background technology
As everyone knows; The lightning protection of unlike signal system needs different protection mode and different interfaces; Like video line, measurement control and lightning-protection systems such as low-tension supply circuit, network communication circuit, different interface types such as corresponding BNC, binding post (comprising all kinds of measurement and control signals and low-tension supply), RJ45 respectively.If use common lightning protection device, then need the one pole lightning protection device of a plurality of different structures to realize.
At present, the siganl thunder-proof device structure of generally using can only be installed a kind of lightning protection circuit and interface, and each lightning protection device of the SPD of its formation also can only be realized a kind of protected mode or interface type.Different protection circuit or interface mode are installed if desired, are then needed various structure to realize.Like this, increase development cost, make troubles for each link of production such as handling of goods and materials, production management, quality management etc., produce simultaneously and the management cost rising.
Through preliminary search, find that the technical scheme close with the present invention is following:
One Chinese patent application number is that 200910019927.9 patent of invention discloses a kind of randomly combined anti-lightening protector; It comprises some one pole lightning protection devices; It is characterized in that: be provided with the draw-in groove of placing nonrigid connector at the shoulder place of one pole lightning protection device, and the nonrigid connector that matches with draw-in groove, can adjacent two lightning protection devices be fixed together is arranged.The user only need have some one pole lightning protection devices, just can connect contact pin, locating ring and two circle formula steel wire Connection Card through circuit as required some one pole lightning protection devices are combined into required anti-lightening protector.
Technique scheme is through using nonrigid connector and draw-in groove; Can some lightning protection devices be combined; But only be that one pole lightning protection device shell is linked together; The lightning protection components and parts of different interface type can not be installed in lightning protection device inside, and said lightning protection device still can only be used for a kind of lightning protection of system, can not satisfy the needs of multisystem lightning protection.
Therefore, necessary prior art is improved.
Summary of the invention
The objective of the invention is deficiency to lightning protection device existence in the prior art; A kind of multipurpose signal lighting protection method and a kind of multipurpose siganl thunder-proof device are provided; Arbitrary lightning protection circuit assembly that adapts with housing can be installed in same lightning protection device housing; Be suitable for multiple various signals interface, realize one module multiple usages.
The technical scheme that technical solution problem of the present invention adopts is following:
A kind of multipurpose signal lighting protection method is characterized in that: the lightning protection circuit assembly that is installed in the lightning protection device enclosure interior is adopted unified modularized design, size, the shape of different lightning protection circuit assemblies and housing are adapted; Select and the corresponding lightning protection circuit assembly of said signal according to the signal system needs, said lightning protection circuit assembly is fixed in the lightning protection device housing forms lightning protection device, and said lightning protection device is used for said signal system.
Said multipurpose signal lighting protection method through changing the lightning protection circuit assembly, obtains the siganl thunder-proof device of difference in functionality, through making up a plurality of lightning protection devices that different lightning protection circuit assemblies are housed, realizes the lightning protection of many signal systems.
According to a kind of multipurpose siganl thunder-proof device that said method obtains, comprise housing, grounding assembly, lightning protection circuit assembly, the first interface inserted sheet, the second interface inserted sheet, cover plate, installation card, spring; Said grounding assembly comprises screw, binding post main part, pressing line frame; Described lightning protection circuit assembly comprises wiring board and the interface element that is furnished with lightning protection component on it; It is characterized in that: said side is provided with two pairs of openings, is respectively first opening and second opening, and two pairs of openings places are equipped with slot; Said lightning protection circuit arrangement of components is at the housing inner chamber; The interface element of said lightning protection circuit assembly embeds in first opening of said side; Said first interface inserted sheet and interface element are used, and the first interface inserted sheet is inserted in the slot of said first opening part, plays the effect of fixed interface element; The said second interface inserted sheet is inserted in the slot of said second opening part, plays the effect of isolating and sealing; Said grounding assembly is arranged in the housing upper right side, and the earth terminal of said lightning protection circuit assembly is connected with the binding post main part of said grounding assembly.
The said first interface inserted sheet is selected according to the type of said interface element.
Further; Said lightning protection circuit assembly is selected RJ45 interface type lightning protection circuit assembly for use, selects the linear first interface inserted sheet for use according to the RJ45 interface element, and said RJ45 interface embeds in first opening of said side; The said linear first interface inserted sheet inserts in the slot of said first opening part; The RJ45 interface is fixed on said first opening part, and the said second interface inserted sheet is inserted in second opening part of said side, constitutes RJ45 interface type lightning protection device.
Further; Said lightning protection circuit assembly is selected bnc interface type lightning protection circuit assembly for use, selects the circular arc first interface inserted sheet for use according to the bnc interface element, and said bnc interface embeds in first opening of said side; The said circular arc first interface inserted sheet inserts in the slot of said first opening part; Bnc interface is fixed on said first opening part, and the said second interface inserted sheet is inserted in second opening part of said side, constitutes bnc interface type lightning protection device.
Said cover plate is provided with alignment pin, and said housing correspondence position is provided with jack, and cover plate and housing are through alignment pin and jack compression fit; Said cover plate and housing are reserved with the securing member connector in addition, are used for the combination of a plurality of housings, and said connecting hole can be a riveted holes; The single lightning protection device of difference in functionality is combined being integrally formed All-in-One lightning protection device according to requirement of engineering.
Described housing upper right quarter is arranged grounding assembly, and there is the fabrication hole of convenient screwdriver turnover its upper end, and earth connection or ground connection row can stretch into and be crimped to the pressing line frame of grounding assembly from its right side ground connection mouth.
Said housing bottom is provided with the standard rail mounting structure, cooperates and can conveniently lightning protection device be installed on the standard guide rail through card and spring are installed.
Said case top is provided with the indication socket.
The beneficial effect that the present invention obtains is:
1, the interface element of lightning protection component and interface inserted sheet are used; As long as design appropriate interface inserted sheet; Just can be installed in the lightning protection device according to the invention by any lightning protection circuit assembly that size is suitable; Pass through the fixedly interface element of lightning protection component of corresponding interface inserted sheet again, can realize one module multiple usages; 2, housing and cover plate are provided with the securing member connector, can be combined into an integral body through securing member when a plurality of lightning protection devices are used in combination, being integrally formed All-in-One lightning protection device; 3, lightning protection device housing bottom is provided with card and spring is installed, and can conveniently lightning protection device be installed on the standard guide rail, is convenient to install, dismantle; 4, said grounding assembly is provided with the fabrication hole that passes in and out when convenient screwdriver advances work, is convenient to connect ground wire, can use when a plurality of lightning protection devices make up to connect the unified ground connection of row, has shortened the earth cable of a plurality of lightning protection devices, has strengthened reliability and protection effect.
Description of drawings
Fig. 1 is the overall appearance figure of a kind of universal signal lightning protection device of the present invention;
Fig. 2 is the internal structure sketch map of a kind of universal signal lightning protection device of the present invention (terminals minor interface);
Fig. 3 is the internal structure sketch map of a kind of universal signal lightning protection device of the present invention (RJ45 interface);
Fig. 4 is the outside drawing of a kind of universal signal lightning protection device of the present invention (RJ45 interface);
Fig. 5 is the internal structure sketch map and the outside drawing of a kind of universal signal lightning protection device of the present invention (bnc interface);
Fig. 6 is the Combination application sketch map of a plurality of lightning protection devices of a kind of universal signal lightning protection device of the present invention;
Among the figure: 1 housing, 2 grounding assemblies, 3 first lightning protection circuit assemblies, 4 linears, the first interface inserted sheet, 5 second interface inserted sheets, 6 circular arcs, the first interface inserted sheet, 7 cover plates, 8 install cards, 9 springs, 10 second lightning protection circuit assemblies, 11 the 3rd lightning protection circuit assemblies, 12 for the big opening of side, 13 be that RJ45 interface, G are bnc interface for the little opening of side, A securing member connector, B indicate socket, C interface of the ground wire, D line interface, E binding post interface, F.
Embodiment
To come further to set forth the present invention through accompanying drawing and embodiment below.
Can find out from accompanying drawing, the present invention be with binding post interface lightning protection circuit assembly, RJ45 interface lightning protection circuit assembly and bnc interface lightning protection circuit assembly as the lightning protection circuit assembly of lightning protection device of the present invention, further the present invention is set forth below.
Shown in Fig. 1 ~ 5, a kind of multipurpose signal lighting protection method is characterized in that: the lightning protection circuit assembly that is installed in the lightning protection device enclosure interior is adopted unified modularized design, size, the shape of different lightning protection circuit assemblies and housing are adapted; Select and the corresponding lightning protection circuit assembly of said signal according to the signal system needs, said lightning protection circuit assembly is fixed in the lightning protection device housing forms lightning protection device, and said lightning protection device is used for said signal system.
Said multipurpose signal lighting protection method through changing the lightning protection circuit assembly, obtains the siganl thunder-proof device of difference in functionality, through making up a plurality of lightning protection devices that different lightning protection circuit assemblies are housed, realizes the lightning protection of many signal systems.
Shown in Fig. 1 ~ 5; A kind of multipurpose siganl thunder-proof device 1 comprises housing 2, grounding assembly, lightning protection circuit assembly (comprising the first lightning protection circuit assembly 3, the second lightning protection circuit assembly 10, the 3rd lightning protection circuit assembly 11), interface inserted sheet (the linear first interface inserted sheet 4, the second interface inserted sheet 5, the circular arc first interface inserted sheet 6), cover plate 7, card 8, spring 9 is installed; Said grounding assembly comprises screw, binding post main part, pressing line frame; Described lightning protection circuit assembly comprises wiring board and the interface element that is furnished with lightning protection component on it; It is characterized in that: said housing 1 side is provided with two pairs of openings (first opening 12, second opening 13); And two pairs of openings places are equipped with slot; Said lightning protection circuit arrangement of components is at the housing inner chamber, and the interface element of said lightning protection circuit assembly embeds in first opening 12 of said housing 1 side; Said first interface inserted sheet and interface element are used; The first interface inserted sheet is inserted in the slot of said the one 12 opening part; Play the effect of fixed interface element, the said second interface inserted sheet 5 is inserted in the slot at said second opening 13 places, plays the effect of isolating and sealing; Said grounding assembly is arranged in the upper right side of housing 1, and the earth terminal of said lightning protection circuit assembly is connected with the binding post main part of said grounding assembly 2.
Said first inserted sheet is selected according to the type of said interface element, and the shape at the first interface inserted sheet two ends matches with first opening and interface element respectively.
Further; Said lightning protection circuit assembly is selected RJ45 interface type lightning protection circuit assembly for use, selects the linear first interface inserted sheet for use according to the RJ45 interface element, and said RJ45 interface embeds in first opening of said side; The said linear first interface inserted sheet inserts in the slot of said first opening part; The RJ45 interface is fixed on said first opening part, and the said second interface inserted sheet is inserted in second opening part of said side, constitutes RJ45 interface type lightning protection device.
Further; Said lightning protection circuit assembly is selected bnc interface type lightning protection circuit assembly for use, selects the circular arc first interface inserted sheet for use according to the bnc interface element, and said bnc interface embeds in first opening of said side; The said circular arc first interface inserted sheet inserts in the slot of said first opening part; Bnc interface is fixed on said first opening part, and the said second interface inserted sheet is inserted in second opening part of said side, constitutes bnc interface type lightning protection device.
Described housing 1 upper right quarter is arranged grounding assembly 2, and there is the fabrication hole of convenient screwdriver turnover its upper end, and earth connection or ground connection row can stretch into and be crimped to the pressing line frame of grounding assembly 2 from its right side ground connection mouth.
Said cover plate 7 is provided with alignment pin, and said housing 1 correspondence position is provided with jack, and cover plate 7 passes through alignment pin and jack compression fit with housing 1; Said cover plate 7 is reserved with securing member connector E in addition with housing 1, is used for the combination of a plurality of housings, and said connecting hole E can be a riveted holes; Can the single lightning protection device of difference in functionality be combined being integrally formed All-in-One lightning protection device according to requirement of engineering.
Said housing 1 bottom is provided with installs card 8 and spring 9, can lightning protection device be installed on the standard guide rail, is convenient to lightning protection device dismounting and maintenance.
Said grounding assembly 2 has fabrication hole, is convenient to instrument turnover lightning protection devices such as screwdriver, when a plurality of lightning protection devices make up, can make things convenient for holding connector bank.
Said housing 1 top is provided with indication socket B, is used to indicate the operating state of lightning protection lightning protection device.
A kind of general lightning protection lightning protection device according to the invention; Its versatility is embodied in: according to the lightning protection purposes, need only select required lightning protection circuit assembly to be installed in the lightning protection device housing, be equipped with the appropriate interface inserted sheet again; Just can realize different lightning protection functions, thereby realize one module multiple usages.Specific embodiment below is provided.
As shown in Figure 2, a kind of binding post interface type lightning protection device comprises housing 1, grounding assembly 2, cover plate 7, the 3rd lightning protection circuit assembly 11, card 8 is installed and spring 9, the three lightning protection circuit assemblies 11 comprise circuit board and the binding post interface E that is furnished with lightning protection device; Housing 1 is " protruding " font, and grounding assembly 2 is positioned at the upper right side of housing 1, and the 3rd lightning protection circuit assembly 11 is installed in the housing 1; Do not use the interface inserted sheet; The binding post interface is come out through first opening 12 and second opening 13, cover cover plate 7, promptly form binding post interface type lightning protection device; Various measurement and control signals of one-tenth capable of being combined and low-tension supply lightning protection device are widely used.
Like Fig. 3, shown in Figure 4; A kind of RJ45 interface type lightning protection device; Comprise housing 1, grounding assembly 2, first lightning protection component 3, the linear first interface inserted sheet 4, the second interface inserted sheet 5, cover plate 7, card 8 be installed, spring 9, the first lightning protection circuit assemblies 3 comprise circuit board and the RJ45 interface F that is furnished with lightning protection device; Housing 1 is " protruding " font; Grounding assembly 2 is positioned at the upper right side of housing 1, and the first lightning protection circuit assembly 3 is installed in the housing 1, and RJ45 interface F places first opening, 12 positions of housing 1 side; The linear first interface inserted sheet 4 two ends be shaped as straight line; Match with the RJ45 interface element with first opening 12 respectively, near the slot the first interface inserted sheet, 4 insertions, first opening 12, make RJ45 interface F be fixed on said first opening 12 positions; Know by embodiment 1, also be provided with second opening 13,, the second interface inserted sheet 5 is installed for the safety that guarantees lightning protection device and attractive in appearance in housing 1 side; Promptly be combined into RJ45 interface type lightning protection device.
As shown in Figure 5; A kind of bnc interface type lightning protection device; Comprise housing 1, grounding assembly 2, second lightning protection component 10, the second interface inserted sheet 5, the circular arc first interface inserted sheet 6, cover plate 7, card 8 be installed, spring 9, the first lightning protection circuit assemblies 3 comprise circuit board and the bnc interface G that is furnished with lightning protection device; Housing 1 is " protruding " font, and grounding assembly 2 is positioned at the upper right side of housing 1, and the second lightning protection circuit assembly 10 is installed in the housing 1; The circular arc first interface inserted sheet 6 one ends are linear, match with first opening 12, and the other end is shaped as circular arc; Match with the bnc interface element; Bnc interface G places first opening, 12 positions of housing 1 side, and the second interface inserted sheet 5 is installed, and promptly is combined into RJ45 interface type lightning protection device.
As shown in Figure 6, through being reserved in the securing member connector A on cover plate 7 and the housing 1, binding post interface type lightning protection device, RJ45 interface type lightning protection device and bnc interface type lightning protection device are fixed together with securing member, be combined into compound lightning protection device.In the practical engineering application, can make up the lightning protection device of any function according to actual needs, being integrally formed All-in-One lightning protection device.
The foregoing description is only done further elaboration to the present invention; Do not limit protection scope of the present invention; Can find out; The present invention can also do some other variation, such as change lightning protection circuit assembly with its supporting interface inserted sheet etc., the change that any those skilled in the art is done under prerequisite without departing from the spirit or scope of the invention all should be regarded as within protection scope of the present invention.
Claims (10)
1. a multipurpose signal lighting protection method is characterized in that: the lightning protection circuit assembly that is installed in the lightning protection device enclosure interior is adopted unified modularized design, size, the shape of different lightning protection circuit assemblies and housing are adapted; Select and the corresponding lightning protection circuit assembly of said signal according to the signal system needs, said lightning protection circuit assembly is fixed in the lightning protection device housing forms lightning protection device, and said lightning protection device is used for said signal system.
2. according to the said a kind of multipurpose signal lighting protection method of claim 1; It is characterized in that: through changing the lightning protection circuit assembly; Obtain the siganl thunder-proof device of difference in functionality,, realize the lightning protection of many signal systems through making up a plurality of lightning protection devices that different lightning protection circuit assemblies are housed.
3. a multipurpose siganl thunder-proof device comprises housing, grounding assembly, lightning protection circuit assembly, the first interface inserted sheet, the second interface inserted sheet, cover plate, installation card, spring; Said grounding assembly comprises screw, binding post main part, pressing line frame; Described lightning protection circuit assembly comprises wiring board and the interface element that is furnished with lightning protection component on it; It is characterized in that: said side is provided with two pairs of openings, is respectively first opening and second opening, and two pairs of openings places are equipped with slot; Said lightning protection circuit arrangement of components is at the housing inner chamber; The interface element of said lightning protection circuit assembly embeds in first opening of said side; Said first interface inserted sheet and interface element are used, and the first interface inserted sheet is inserted in the slot of said first opening part, plays the effect of fixed interface element; The said second interface inserted sheet is inserted in the slot of said second opening part, plays the effect of isolating and sealing; Said grounding assembly is arranged in the housing upper right side, and the earth terminal of said lightning protection circuit assembly is connected with the binding post main part of said grounding assembly.
4. according to the said multipurpose siganl thunder-proof device of claim 3, it is characterized in that: the said first interface inserted sheet is selected according to the type of said interface element.
5. according to claim 3 or 4 said a kind of multipurpose siganl thunder-proof devices; It is characterized in that: said lightning protection circuit assembly is selected RJ45 interface type lightning protection circuit assembly for use; Select the linear first interface inserted sheet for use according to the RJ45 interface element; Said RJ45 interface embeds in first opening of said side, and the said linear first interface inserted sheet inserts in the slot of said first opening part, and the RJ45 interface is fixed on said first opening part; The said second interface inserted sheet is inserted in second opening part of said side, constitutes RJ45 interface type lightning protection device.
6. according to the said a kind of multipurpose siganl thunder-proof device of claim 5; It is characterized in that: said lightning protection circuit assembly is selected bnc interface type lightning protection circuit assembly for use; Select the circular arc first interface inserted sheet for use according to the bnc interface element; Said bnc interface embeds in first opening of said side, and the said circular arc first interface inserted sheet inserts in the slot of said first opening part, and bnc interface is fixed on said first opening part; The said second interface inserted sheet is inserted in second opening part of said side, constitutes bnc interface type lightning protection device.
7. according to claim 3 or 4 said a kind of multipurpose siganl thunder-proof devices, it is characterized in that: said cover plate is provided with alignment pin, and said housing correspondence position is provided with jack, and cover plate and housing are through alignment pin and jack compression fit; Said cover plate and housing are reserved with the securing member connector in addition, are used for the combination of a plurality of housings, and said connecting hole can be a riveted holes; The single lightning protection device of difference in functionality is combined being integrally formed All-in-One lightning protection device according to requirement of engineering.
8. according to claim 3 or 4 said a kind of multipurpose siganl thunder-proof devices; It is characterized in that: described housing upper right quarter is arranged grounding assembly; There is the fabrication hole of convenient screwdriver turnover its upper end, and earth connection or ground connection row can stretch into and be crimped to the pressing line frame of grounding assembly from its right side ground connection mouth.
9. according to claim 3 or 4 said a kind of multipurpose siganl thunder-proof devices, it is characterized in that: said housing bottom is provided with the standard rail mounting structure, cooperates and can conveniently lightning protection device be installed on the standard guide rail through card and spring are installed.
10. according to claim 3 or 4 said a kind of multipurpose siganl thunder-proof devices, it is characterized in that: said case top is provided with the indication socket.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110292158A CN102332715A (en) | 2011-09-30 | 2011-09-30 | Multipurpose signal lightning-protection method and multipurpose signal lightning-protection device |
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| CN201110292158A CN102332715A (en) | 2011-09-30 | 2011-09-30 | Multipurpose signal lightning-protection method and multipurpose signal lightning-protection device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602814A (en) * | 2012-03-28 | 2012-07-25 | 江苏华澄重工有限公司 | Lightning-proof grounding device for cranes |
| CN103580018A (en) * | 2013-11-19 | 2014-02-12 | 国家电网公司 | Anti-thunder device with waterproof function |
| CN103857066A (en) * | 2012-12-07 | 2014-06-11 | 纳普（上海）软件有限公司 | Wireless sensor network establishing system and method |
| CN103856545A (en) * | 2012-12-07 | 2014-06-11 | 纳普（上海）软件有限公司 | Wired sensor networking system and method |
| CN103986140A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Inserting piece type anti-thunder device |
| CN108617157A (en) * | 2018-06-09 | 2018-10-02 | 浙江雷宇防雷技术有限公司 | A kind of lightning protection detection case |
| CN110764026A (en) * | 2019-10-31 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Railway signal in-use cable core wire application identification system based on signal source excitation |
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| CN2781625Y (en) * | 2004-11-21 | 2006-05-17 | Tcl国际电工(无锡)有限公司 | Combined connection structure of combined surge protector |
| CN101958539A (en) * | 2010-10-12 | 2011-01-26 | 深圳市康普盾电子科技有限公司 | Signal lightning protector with remote signaling function |
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| JP2003102126A (en) * | 2001-09-20 | 2003-04-04 | Otowa Denki Kogyo Kk | Arrester apparatus |
| CN2781625Y (en) * | 2004-11-21 | 2006-05-17 | Tcl国际电工(无锡)有限公司 | Combined connection structure of combined surge protector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102602814A (en) * | 2012-03-28 | 2012-07-25 | 江苏华澄重工有限公司 | Lightning-proof grounding device for cranes |
| CN103857066A (en) * | 2012-12-07 | 2014-06-11 | 纳普（上海）软件有限公司 | Wireless sensor network establishing system and method |
| CN103856545A (en) * | 2012-12-07 | 2014-06-11 | 纳普（上海）软件有限公司 | Wired sensor networking system and method |
| CN103580018A (en) * | 2013-11-19 | 2014-02-12 | 国家电网公司 | Anti-thunder device with waterproof function |
| CN103986140A (en) * | 2014-05-09 | 2014-08-13 | 广西南宁百兰斯科技开发有限公司 | Inserting piece type anti-thunder device |
| CN108617157A (en) * | 2018-06-09 | 2018-10-02 | 浙江雷宇防雷技术有限公司 | A kind of lightning protection detection case |
| CN110764026A (en) * | 2019-10-31 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Railway signal in-use cable core wire application identification system based on signal source excitation |
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Application publication date: 20120125 |