CN204424889U - A kind of thunder and lightning indirect effect safeguard structure of airborne equipment - Google Patents
A kind of thunder and lightning indirect effect safeguard structure of airborne equipment Download PDFInfo
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- CN204424889U CN204424889U CN201420728386.3U CN201420728386U CN204424889U CN 204424889 U CN204424889 U CN 204424889U CN 201420728386 U CN201420728386 U CN 201420728386U CN 204424889 U CN204424889 U CN 204424889U
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Abstract
The utility model relates to a kind of thunder and lightning indirect effect safeguard structure of airborne equipment, forms primarily of a metal shell, a lightning protection filter, an aerial lug and an internal circuit board.Described lightning protection filter is connected with described metal shell by least one overlap joint stud, described lightning protection filter has an earth terminal, these overlap joint studs described and described earth terminal are electrically connected, and each stitch of described aerial lug is all electrically connected by a lightning protection component and described earth terminal.By arranging above-mentioned two heat insulation bodies, effectively preventing the heat trnasfer between inside and outside protective material, improving the quality extruding cable.
Description
Technical field
The utility model relates to the lightning protection of airborne equipment, particularly a kind of thunder and lightning indirect effect safeguard structure of airborne equipment.
Background technology
Present generation aircraft proposes more and more higher requirement to environmental suitability especially fail safe, thunder and lightning is as a kind of natural phenomena, happen occasionally in the flight course of aircraft, thus thunder and lightning is as the destructive energy of one, threaten the normal work of airborne equipment at any time, also threaten the safe operation of aircraft.Thunder and lightning indirect effect protection Design has vital meaning in guarantee flight safety.
Based on the circuit board of piezo-resistance, piezo-resistance presents higher impedance under normal circumstances, is equivalent to open circuit, and under the effect of outside high-voltage pulse, can presents Low ESR, thus provides leakage path for lightning current.But, piezo-resistance has two large shortcomings in lightning protection, first shortcoming is that clamp voltage is forbidden, for GNR10D330K, its clamp voltage is usually at 30-36V, maximum clamp voltage is 65V, and so large scope range of the fluctuation of voltage can exceed the tolerance range of airborne equipment internal electronic component.Second shortcoming of piezo-resistance is that operate time is relatively slow, is generally 25ns, and for some sensitive electron components and parts, the high-voltage pulse continuing 25ns may cause its disabler.
For this reason, the Chinese utility model patent CN202262218U disclosed " a kind of lightning effects/electromagnetic compatible protective cabin " of No.618 Research Institute of China Aviation Industry, it mainly comprises, cabinet front shroud, circuit board and connector, the periphery of circuit board arranges a circle copper-clad plate, the girth of cabinet front shroud is equal with the girth of the copper-clad plate on circuit board, connector mounting on cabinet front shroud also seals, cabinet front shroud to be installed in copper-clad plate on circuit boards and is screwed, thus, a closed containing cavity is formed.Being not difficult to find out, there is following shortcoming in said structure: 1, poor radiation, and part components and parts are all sealed in closed containing cavity, and because closed containing cavity limits by overall structure, volume is very little, namely cannot dispel the heat normally.2, lightning protection filter circuit and other circuit share a circuit board, easy crosstalk.
In addition, lightning protection in the past only considers the design of filter circuit plate, and will play the effect of lightning protection, and good structure overlap joint also seems abnormal important, and thus circuit and structural design will combine consideration.
The content of CN202262218U is also incorporated to herein by reference.
Utility model content
The purpose of this utility model is that solution clamp voltage range is wide, and the problem that the response time is long, provides a kind of thunder and lightning indirect effect safeguard structure of novel airborne equipment.
To achieve these goals, the technical solution of the utility model is achieved in that a kind of thunder and lightning indirect effect safeguard structure of airborne equipment, it is characterized in that, comprises,
One metal shell, it is arranged on an aircaft configuration, is formed with an accommodation space in described metal shell, described metal shell has an installation through hole;
One lightning protection filter, it to be arranged in described accommodation space and to be in close proximity to described installation through hole, and described lightning protection filter is connected with described metal shell by least one overlap joint stud;
One aerial lug, it is arranged in described installation through hole, and described aerial lug is in order to be electrically connected a thunder and lightning source and described lightning protection filter; And,
One internal circuit board, it to be arranged in described accommodation space and to be separated with described lightning protection filter, and described internal circuit board is electrically connected by an internal connector and described lightning protection filter.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, described lightning protection filter have lightning protection component, earth terminal, input link and export link, wherein, aerial lug described in described input link system connects, one end of described lightning protection component is connected between described input link and described output, its other end is connected with described earth terminal, and described earth terminal system is connected with described metal shell by described overlap joint stud.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, described lightning protection component is TVS diode, preferably, is two-way TVS diode.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, described metal shell at least has side plate and a base plate, wherein, described installation through hole is arranged on described side plate, described lightning protection filter parallels with described side plate, and described base plate is arranged on described aircaft configuration and described base plate and described aircaft configuration are face contacts.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, the mating surface of described side plate and described aircaft configuration adopts conductive anode process, and adopts similar metal.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, described metal shell is fixed on described aircaft configuration by installation gusset plate and trip bolt.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, the overlap resistance of described overlap joint stud is less than 5 milliohms, and the described length of overlap joint stud and the ratio of its width are no more than 5:1, to reduce high-frequency harmonic impedance.
As a kind of preferred version of thunder and lightning indirect effect safeguard structure of airborne equipment, described internal circuit board and described lightning protection filter are at a distance of a distance, and described distance controlling is at more than 20mm.
Compared with prior art; the utility model has the advantage of: simple and reliable for structure, by lightning protection filter, clamp voltage range is controlled in a less scope, and the response time is shorter; effectively protect the sensitive electron components and parts on internal circuit board, make the operation of airborne equipment more reliable.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the electrical block diagram of lightning protection filter of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is elaborated.
Refer to Fig. 1, shown in figure is a kind of thunder and lightning indirect effect safeguard structure of airborne equipment, forms primarily of metal shell 1, lightning protection filter 3, aerial lug 5 and an internal circuit board 6.
Described metal shell is made up of good conductor, and it can play the effect of shielding lightning wave, and the emittance that thunder and lightning is produced is unlikely to enter into airborne equipment inside.Described metal shell at least has side plate and a base plate.In the present embodiment, described metal shell is rectangle box body.Be formed with an accommodation space 10 in described metal shell, the described side plate of described metal shell have an installation through hole 11.Described base plate is by installing gusset plate 8 and trip bolt 9 and to be arranged on an aircaft configuration 2 and described base plate and described aircaft configuration being face contacts.The mating surface of described base plate and described aircaft configuration adopts conductive anode process, and adopts similar metal, to reduce the possibility of corrosion.It is noted herein that gusset plate mounting screw only provides effect fastening in structure, real electric overlap joint by the contact-making surface of metal shell and described aircaft configuration reliable contacts and realize.
Described lightning protection filter is arranged in described accommodation space to be also close to and is parallel to described installation through hole.Described lightning protection filter have lightning protection component, earth terminal, input link and export link.Wherein, aerial lug described in described input link system connects.As shown in Figure 2, one end of described lightning protection component is connected between described input link and described output, and its other end is connected with described earth terminal, described lightning protection component is TVS diode, TVS diode has voltage clamping narrow range, and the response time is fast, the feature that reliability is high.。In the selection of TVS diode, will determine according to the size of external lightning energy, its Selection parameter comprises off-line voltage, clamp voltage range, and peak-peak energy etc.When the selection of device, two-way TVS pipe be selected, because lightning wave may just, also may be born, the derate coefficient of temperature will be considered simultaneously, to meet the adaptive needs of aircraft environment.Described earth terminal system is connected with described metal shell by described overlap joint stud.The overlap resistance of described overlap joint stud is less than 5 milliohms, and described overlap joint stud adopts good conductor material, and the ratio of length and its width is no more than 5:1, to reduce high-frequency harmonic impedance, provides lower AC impedance, is beneficial to passing through of thunder energy.
Described aerial lug is arranged in described installation through hole.Described aerial lug is in order to be electrically connected a thunder and lightning source and described lightning protection filter.
Described internal circuit board to be arranged in described accommodation space and to be separated with described lightning protection filter, described internal circuit board and described lightning protection filter are at a distance of a distance, described distance controlling, at more than 20mm, separates certain distance from physical space, to avoid mutual crosstalk.Described internal circuit board is electrically connected with described lightning protection filter by an internal connector 7.
Visible, unique admission passage of thunder energy is described aerial lug, by the contact pin of aerial lug, to described lightning protection filter, through described overlap joint stud, goes to described metal shell, finally arrives described aircaft configuration.And when thunder energy arrives, thunder energy by thunder and lightning high pressure clamper within the specific limits, and can be led described aircaft configuration by the aforesaid approach of releasing by TVS diode, makes the electromagnetic sensor of described internal circuit board to be affected.
Below only have expressed execution mode of the present utility model, it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.
Claims (8)
1. a thunder and lightning indirect effect safeguard structure for airborne equipment, is characterized in that, comprise,
One metal shell, it is arranged on an aircaft configuration, is formed with an accommodation space in described metal shell, described metal shell has an installation through hole;
One lightning protection filter, it to be arranged in described accommodation space and to be in close proximity to described installation through hole, and described lightning protection filter is connected with described metal shell by least one overlap joint stud;
One aerial lug, it is arranged in described installation through hole, and described aerial lug is in order to be electrically connected a thunder and lightning source and described lightning protection filter; And,
One internal circuit board, it to be arranged in described accommodation space and to be separated with described lightning protection filter, and described internal circuit board is electrically connected by an internal connector and described lightning protection filter.
2. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 1, it is characterized in that, described lightning protection filter have lightning protection component, earth terminal, input link and export link, wherein, aerial lug described in described input link system connects, one end of described lightning protection component is connected between described input link and described output, and its other end is connected with described earth terminal, and described earth terminal system is connected with described metal shell by described overlap joint stud.
3. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 2, is characterized in that, described lightning protection component is TVS diode.
4. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 1, it is characterized in that, described metal shell at least has side plate and a base plate, wherein, described installation through hole is arranged on described side plate, described lightning protection filter parallels with described side plate, and described base plate is arranged on described aircaft configuration and described base plate and described aircaft configuration are face contacts.
5. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 4, is characterized in that, the mating surface of described side plate and described aircaft configuration adopts conductive anode process, and adopts similar metal.
6. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 1, is characterized in that, described metal shell is fixed on described aircaft configuration by installation gusset plate and trip bolt.
7. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 1, it is characterized in that, the overlap resistance of described overlap joint stud is less than 5 milliohms, and the described length of overlap joint stud and the ratio of its width are no more than 5:1, to reduce high-frequency harmonic impedance.
8. the thunder and lightning indirect effect safeguard structure of a kind of airborne equipment according to claim 1, is characterized in that, described internal circuit board and described lightning protection filter are at a distance of a distance, and described distance controlling is at more than 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420728386.3U CN204424889U (en) | 2014-11-28 | 2014-11-28 | A kind of thunder and lightning indirect effect safeguard structure of airborne equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420728386.3U CN204424889U (en) | 2014-11-28 | 2014-11-28 | A kind of thunder and lightning indirect effect safeguard structure of airborne equipment |
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| CN204424889U true CN204424889U (en) | 2015-06-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578028A (en) * | 2014-11-28 | 2015-04-29 | 上海航空电器有限公司 | Lightning indirect effect protective structure of airborne equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578028A (en) * | 2014-11-28 | 2015-04-29 | 上海航空电器有限公司 | Lightning indirect effect protective structure of airborne equipment |
| CN104578028B (en) * | 2014-11-28 | 2019-03-05 | 上海航空电器有限公司 | A kind of lightning indirect effect protection structure of airborne equipment |
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