CN104578028B - A kind of lightning indirect effect protection structure of airborne equipment - Google Patents
A kind of lightning indirect effect protection structure of airborne equipment Download PDFInfo
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- CN104578028B CN104578028B CN201410700787.2A CN201410700787A CN104578028B CN 104578028 B CN104578028 B CN 104578028B CN 201410700787 A CN201410700787 A CN 201410700787A CN 104578028 B CN104578028 B CN 104578028B
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- lightning
- lightning protection
- airborne equipment
- metal shell
- indirect effect
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Abstract
The present invention relates to a kind of lightning indirect effect protection structures of airborne equipment, are mainly made of a metal shell, a lightning protection filter, an aerial lug and an internal circuit board.The lightning protection filter is connected with the metal shell by an at least lap stud, there is a ground terminal on the lightning protection filter, these described lap studs are electrically connected with the ground terminal, and each stitch of the aerial lug passes through a lightning protection component and is electrically connected with the ground terminal.By the way that above-mentioned two insulating body is arranged, the heat transmitting being effectively prevented between inner and outer protective materials improves the quality for squeezing out cable.
Description
Technical field
The present invention relates to the lightning protection of airborne equipment, the thunder and lightning indirect effect of especially a kind of airborne equipment protects knot
Structure.
Background technique
Modern aircraft proposes increasingly higher demands to environmental suitability especially safety, and thunder and lightning is as a kind of nature
Phenomenon happens occasionally during the flight of the airplane, thus thunder and lightning threatens airborne set as a kind of destructive energy at any time
Standby normal work also threatens the safe operation of aircraft.Lightning indirect effect protection design has in ensuring flight safety
Vital meaning.
Circuit board based on varistor, varistor show higher impedance under normal circumstances, are equivalent to open circuit,
And under the action of external high voltage pulses, Low ESR can be presented, to provide leakage path for lightning current.However, pressure-sensitive electricity
Resistance has a two big disadvantages in terms of lightning protection, first the disadvantage is that clamp voltage is inaccurate, by taking GNR10D330K as an example, clamper electricity
For pressure usually in 30-36V, maximum clamp voltage is 65V, and so big scope range of the fluctuation of voltage can exceed airborne equipment internal electron
The tolerance range of component.Second of varistor is the disadvantage is that actuation time is relatively slow, and usually 25ns, quick for some
For feeling electronic component, the high-voltage pulse for continuing 25ns may result in its disabler.
For this purpose, disclosed in the Chinese utility model patent CN202262218U of No.618 Research Institute of China Aviation Industry
" a kind of lightning effects/electromagnetic compatible protective cabin ", mainly includes chassis front cover, circuit board and connector, outside circuit board
One circle copper-clad plate of setting is enclosed, the perimeter of chassis front cover is equal with the perimeter of the copper-clad plate on circuit board, pacifies in chassis front cover
Attaching plug-in unit simultaneously seals, and chassis front cover installation is upper on the copper clad laminate on the circuit board and is screwed, and it is closed to form one as a result,
Cavity.It is not difficult to find out that above structure has the disadvantage in that 1, poor radiation, some components are sealed in closed containing cavity,
Since closed containing cavity is limited by overall structure, volume very little can not normally radiate.2, lightning protection filter circuit and other circuits
A circuit board is shared, crosstalk is easy.
In addition, previous lightning protection only accounts for the design of filter circuit plate, and the effect of lightning protection is played, it is good
Good structural overlap also seems abnormal important, thus circuit and structure design will combine consideration.
The content of CN202262218U is also by being incorporated herein by reference.
Summary of the invention
It is wide that present invention aim to address clamp voltage ranges, response time long problem, provides a kind of novel airborne
The lightning indirect effect protection structure of equipment.
To achieve the goals above, the technical scheme of the present invention is realized as follows: a kind of thunder and lightning of airborne equipment is indirect
Effect safeguard structure, which is characterized in that including,
One metal shell is set on an aircaft configuration, and an accommodating space, the gold are formed in the metal shell
Belonging to has an installation through-hole on shell；
One lightning protection filter is arranged in the accommodating space and is in close proximity to the installation through-hole, the lightning protection filtering
Device is connected with the metal shell by an at least lap stud；
One aerial lug, in the mounting through hole, the aerial lug is to by a thunder and lightning source and institute for setting
Lightning protection filter is stated to be electrically connected；And
One internal circuit board, setting mutually separate in the accommodating space and with the lightning protection filter, the inside
Circuit board is electrically connected by an internal connector and the lightning protection filter.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment has on the lightning protection filter
Lightning protection component, ground terminal, input connector and output connector, wherein aerial lug described in the input connector system connects
It connects, between one end of the lightning protection component connects output end between the input connection end and the output end, the other end and the ground terminal
Connection, the ground terminal system are connected with the metal shell by the lap stud.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the lightning protection component are TVS bis-
Pole pipe, it is preferable that be two-way TVS diode.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the metal shell at least have
Side plate and a bottom plate, wherein on the side plate, the lightning protection filter is equal with the side plate for the installation through-hole setting
Row, the bottom plate setting is on the aircraft structure and the bottom plate and the aircaft configuration are face contact.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the side plate and the aircraft knot
The mating surface of structure uses conductive anodizing, and uses similar metal.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the metal shell pass through installation
Cornual plate and fastening screw are fixed on the aircraft structure.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the overlap joint electricity of the lap stud
Resistance is no more than 5:1 less than 5 milliohms, the length of the lap stud and the ratio of its width, to reduce high frequency harmonic impedance.
A kind of preferred embodiment of lightning indirect effect protection structure as airborne equipment, the internal circuit board with it is described
Lightning protection filter is at a distance of a distance, and the distance controlling is in 20mm or more.
Compared with the prior art, the advantages of the present invention are as follows: it is simple and reliable for structure, by lightning protection filter by clamp voltage
In a smaller range, and the response time is shorter, the sensitive electron member device being effectively protected on internal circuit board for scope control
Part keeps the operation of airborne equipment more reliable.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the electrical block diagram of lightning protection filter of the invention.
Specific embodiment
It elaborates with reference to the accompanying drawings and examples to the present invention.
Referring to Figure 1, it is shown in figure be a kind of airborne equipment lightning indirect effect protection structure, mainly by a metal
Shell 1, a lightning protection filter 3, an aerial lug 5 and an internal circuit board 6 composition.
The metal shell is made of good conductor, it can play the role of shielding lightning wave, so that spoke caused by thunder and lightning
Energy is penetrated to be unlikely to enter inside airborne equipment.The metal shell at least has side plate and a bottom plate.In the present embodiment,
The metal shell is rectangular box.Be formed with an accommodating space 10 in the metal shell, the metal shell it is described
There is an installation through-hole 11 on side plate.The bottom plate by installation cornual plate 8 and fastening screw 9 be set on an aircaft configuration 2 and
The bottom plate and the aircaft configuration are face contact.The mating surface of the bottom plate and the aircaft configuration is using at conductive anode
Reason, and similar metal is used, a possibility that reduce corrosion.It is noted herein that cornual plate mounting screw is provided solely for tying
The effect fastened on structure, real electrical overlap joint reality by the reliable contacts of metal shell and the contact surface of the aircaft configuration
It is existing.
Lightning protection filter setting is in the accommodating space and close to being parallel to the installation through-hole.The lightning protection filter
There is lightning protection component, ground terminal, input connector and output connector on wave device.Wherein, outer described in the input connector system
The connection of portion's connector.As shown in Fig. 2, between one end of the lightning protection component connects output end between the input connection end and the output end,
Its other end is connect with the ground terminal, and the lightning protection component is TVS diode, and TVS diode has voltage clamping narrow range,
The characteristics of response time is fast, high reliablity.In the selection of TVS diode, according to the size of external lightning energy,
Its selection parameter includes off-line voltage, clamp voltage range and maximum peak energy etc..In the selection of devices, Yao Xuanyong
Two-way TVS pipe, because lightning wave may be just, it is also possible to it is negative, while to consider the derating factor of temperature, it is suitable to meet aircraft environment
The needs of answering property.The ground terminal system is connected with the metal shell by the lap stud.The overlap joint of the lap stud
Resistance is less than 5 milliohms, and the lap stud uses good conductor material, and length and the ratio of its width are no more than 5:1, to reduce height
Frequency harmonic impedance provides lower AC impedance, conducive to passing through for thunder energy.
The aerial lug setting is in the mounting through hole.The aerial lug to by a thunder and lightning source with it is described
Lightning protection filter is electrically connected.
The internal circuit board setting mutually separates in the accommodating space and with the lightning protection filter, the internal electricity
At a distance of a distance, the distance controlling separates certain in 20mm or more from physical space for road plate and the lightning protection filter
Distance, to avoid mutual crosstalk.The internal circuit board is electrically connected by an internal connector 7 with the lightning protection filter.
As it can be seen that unique channel that enters of thunder energy is the aerial lug, by the contact pin of aerial lug, institute is arrived
Lightning protection filter is stated, through the lap stud, the metal shell is gone to, finally reaches the aircaft configuration.And in lightning energy
When amount arrives, TVS diode can be by thunder and lightning high pressure clamper in a certain range, and thunder energy is released by above-mentioned
Approach leads the aircaft configuration, so that the electromagnetic sensor of the internal circuit board is unaffected.
Embodiments of the present invention are only expressed above, and the description thereof is more specific and detailed, but can not therefore understand
For the limitation to patent of invention range.It should be pointed out that for those of ordinary skill in the art, not departing from this hair
Under the premise of bright design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Therefore, this hair
The scope of protection shall be subject to the appended claims for bright patent.
Claims (5)
1. a kind of lightning indirect effect protection structure of airborne equipment, which is characterized in that including,
One metal shell is set on an aircaft configuration, and an accommodating space, the metal-back are formed in the metal shell
There is an installation through-hole on body；
One lightning protection filter, is arranged in the accommodating space and is in close proximity to the installation through-hole, and the lightning protection filter is logical
An at least lap stud is crossed to be connected with the metal shell；
One aerial lug, in the mounting through hole, the aerial lug is to prevent a thunder and lightning source with described for setting
Thunder filter is electrically connected；And
One internal circuit board, setting mutually separate in the accommodating space and with the lightning protection filter, the internal circuit
Plate is electrically connected by an internal connector and the lightning protection filter；
The overlap resistance of the lap stud is no more than 5 less than 5 milliohms, the length of the lap stud and the ratio of its width:
1；
The metal shell at least has side plate and a bottom plate, wherein the installation through-hole setting is on the side plate, described
Lightning protection filter is parallel with the side plate, and bottom plate setting is on the aircraft structure and the bottom plate and the aircraft knot
Structure is face contact；
The internal circuit board and the lightning protection filter are at a distance of a distance, and the distance controlling is in 20mm or more.
2. a kind of lightning indirect effect protection structure of airborne equipment according to claim 1, which is characterized in that described anti-
There is lightning protection component, ground terminal, input connector and output connector, wherein the institute, input connector system on thunder filter
Aerial lug connection is stated, it is another between one end of the lightning protection component connects output end between the input connection end and the output end
End is connect with the ground terminal, and the ground terminal system is connected with the metal shell by the lap stud.
3. a kind of lightning indirect effect protection structure of airborne equipment according to claim 2, which is characterized in that described anti-
Thunder device is TVS diode.
4. a kind of lightning indirect effect protection structure of airborne equipment according to claim 1, which is characterized in that the bottom
The mating surface of plate and the aircaft configuration uses conductive anodizing, and uses similar metal.
5. a kind of lightning indirect effect protection structure of airborne equipment according to claim 1, which is characterized in that the gold
It is fixed on the aircraft structure by installation cornual plate and fastening screw to belong to shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700787.2A CN104578028B (en) | 2014-11-28 | 2014-11-28 | A kind of lightning indirect effect protection structure of airborne equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410700787.2A CN104578028B (en) | 2014-11-28 | 2014-11-28 | A kind of lightning indirect effect protection structure of airborne equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104578028A CN104578028A (en) | 2015-04-29 |
| CN104578028B true CN104578028B (en) | 2019-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410700787.2A Active CN104578028B (en) | 2014-11-28 | 2014-11-28 | A kind of lightning indirect effect protection structure of airborne equipment |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110556809A (en) * | 2019-09-09 | 2019-12-10 | 贵州天义电器有限责任公司 | lightning protection assembly based on primary power distribution device of airplane |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694583Y (en) * | 2003-10-21 | 2005-04-20 | 华为技术有限公司 | A lightning protection circuit |
| CN202042891U (en) * | 2011-02-22 | 2011-11-16 | 段泽民 | Lightning protection device of airplane surface antenna system |
| EP2790284A1 (en) * | 2013-04-10 | 2014-10-15 | Hamilton Sundstrand Corporation | Transient voltage suppression protection circuit including built in testing |
| CN204424889U (en) * | 2014-11-28 | 2015-06-24 | 上海航空电器有限公司 | A kind of thunder and lightning indirect effect safeguard structure of airborne equipment |
-
2014
- 2014-11-28 CN CN201410700787.2A patent/CN104578028B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2694583Y (en) * | 2003-10-21 | 2005-04-20 | 华为技术有限公司 | A lightning protection circuit |
| CN202042891U (en) * | 2011-02-22 | 2011-11-16 | 段泽民 | Lightning protection device of airplane surface antenna system |
| EP2790284A1 (en) * | 2013-04-10 | 2014-10-15 | Hamilton Sundstrand Corporation | Transient voltage suppression protection circuit including built in testing |
| CN204424889U (en) * | 2014-11-28 | 2015-06-24 | 上海航空电器有限公司 | A kind of thunder and lightning indirect effect safeguard structure of airborne equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104578028A (en) | 2015-04-29 |
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