CN1162735A

CN1162735A - Invisible armour technology

Info

Publication number: CN1162735A
Application number: CN 96116895
Authority: CN
Inventors: 林砺宗
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-16
Filing date: 1996-04-16
Publication date: 1997-10-22

Abstract

A locally geometrical block stealth technique for surficially designing stealth weapons generating omnibearing stealth effect features that it is needed to consider if the surface is vertical to horizontal plane and it is only needed to slightly modify the existing structural shape without designing from the scratch. It can be used for stealth design of ground, sea and space weapons.

Description

Invisible armour technology

Stealth technique is the important topic of military technology research in recent years.The military equipment that stealth aircraft, naval vessels and tank etc. and so on have occurred at present.The stealth technique of these equipments mainly be adopt inclined design and absorbing material or surface coating material method (Zhang Shiying, " stealthy warship canon ", " Modern Ships ", 1996, No.123, P25).With regard to inclined design, its aim is structurally to reduce as far as possible or avoid tapered outer surface.This has just caused the profile geometric properties of stealthy product and the geometric properties of conventional products to differ widely, and the structure of entire product needs redesign, so difficulty is very big.This also is the place of stealthy weapon mystery.On the other hand, inclined design can't be hidden the probing wave from the high-altitude.In a word, the stealthy product of inclined design is structure and complex contour not only, and its stealthy effect has very strong directionality.

Patent of the present invention is announced a kind of surface design technology that can produce comprehensive stealthy effect---local geometric dermatotome stealth technique, and it makes the stealthy weapon of design become easy.Adopt the stealthy weapon of this method design can not consider whether to have the surface vertical with horizontal plane, in addition can be on existing planform in addition a little change get final product, need not structure is redesigned.

Examine or check a flat board (Fig. 1) first, arranging many apertures on it regularly, arbitrary edge of aperture must overlap with the edge of other one or more apertures.Such hole can be triangle, rectangle or polygon.Be that example is illustrated below with the rectangular opening.Promptly arranging the bottom outlet that has that the cross section is a rectangle on flat board by rows, the inwall in hole is made up of four curved surfaces (containing the plane), the cross-sectional sizes difference of different depth in the hole, and four curved surfaces meet at a bit together at the bottom of the hole.Fig. 2 is the profile of certain direction of square hole, and wherein hole wall is represented with curve.Curve may be garden arc, parabola or straight line, and the parameter of each bar line can be different.But a hole requires to satisfy following normal condition: promptly upward the normal of any point must be crossing with the curve (hole wall) on opposite for curve (hole wall).This requirement is in order to ensure penetrating the hole wall that the wave beam that comes will the directive opposite through first reflection after from any angle, thereby makes and can directly do not reflected from the wave beam of any angle directive dermatotome, reflects but produce for the second time over there.After reflection for the second time, wave beam is with a side of directive first reflection face.If this moment, wave beam did not intersect with this hole wall, then this wave beam will can not return along the direction of original directive dermatotome.This has just produced stealthy effect, unless special circumstances: the normal direction of first pip is vertical with the normal direction of second pip.For example, when hole wall was two orthogonal planes (this hole wall does not meet aforementioned normal condition), wave beam was as long as penetrate along any direction, through penetrating back along the parallel direction of direction when coming after two secondary reflections.So should guarantee not exist orthogonal 2 points of normal during design hole wall curved surface.

Another kind of possibility is that the ripple that reflects for the second time and the hole wall on opposite meet and produce reflection for the third time.Side when wave beam and come through the wave direction that reflects for the third time, but chance parallel to each other is seldom.This has in fact also produced stealthy effect.Even be parallel to each other, the opposite direction of wave beam when coming penetrated back, but this ripple has passed through triple reflection, as long as hole wall surface has wave-sucking performance, then the effect raising is three times.And the poorest situation of this effect that is to say that armour technology can improve three times with stealthy effect at least.

Be that example is illustrated with garden arc curve (being garden post hole wall) below.O among Fig. 3 ₁And O ₂Be respectively the garden heart of two hole wall curves, the center line of garden cylinder just, P ₀O ₂Be P ₀The normal of point.Wave beam S ₁Through P ₀, P ₁And P ₁₁Triple reflection is afterwards along S ₁₁Direction penetrates.On the contrary, if certain wave beam along S ₁₁Incident, then it will be along S ₁Return.S ₂Through P ₀, P ₂, P ₀After the triple reflection is S ₂₂, it is along S ₂Direction when coming is returned.This kind situation, that plays stealthy effect can only lean on wave-absorbing effect.But with S ₂The wave beam of direction incident can only be at P ₀Point can produce this type of situation, and the condition of its generation is that first pip is on the normal of second pip.So even this kind situation does not produce stealthy effect, also be unlikely to cause inefficacy to whole probing wave hidden function.S ₃Through P ₀, P ₃Afterwards along S ₃₃Penetrate and also may produce reflection for the third time.Therefore the dermatotome that adopts this patent method to design is penetrated the probing wave that comes to any direction and can both be produced good stealthy effect.

Suppose to have three beams to survey wave beam S ₁, S ₂And S ₃Directive dermatotome vertically, the incident point is respectively P ₁, P ₂And P ₃S ₂Through P ₂, P ₂₂And P ₂After the triple reflection is S ₂₂, it is along S ₂Direction when coming is returned.S ₁Through P ₁And P ₁₁After the reflection is S ₁₁, it will produce reflection for the third time, also the 4th secondary reflection might take place.S ₃Through P ₃And P ₃₃Reflection is afterwards along S ₃₃Scatter, but also may produce reflection for the third time.

The normal condition proposes in order to guarantee that probing wave to any direction works.If, then can not observe the normal condition fully, for example adopt two angles to equal the plane of 90 degree for a short time just in order to improve the stealthy performance of certain direction scope.The more for a short time scope that works of angle is big more, and the big more scope that works of angle is more little.This is because wave beam does not produce repeatedly reflection or scattering when the direction vertical with hole wall penetrates.

On the profile that can be used to build the stealthy outer cover of terrestrial weapon system or directly be made in military equipment according to the dermatotome of the art of this patent design as aircraft, ships and guided missile.Can consider to adopt the plane hole wall for ground and naval target.For moving target, can in the hole, fill transparent material in order to reduce air drag.Unnecessary material can cut out behind, so thickness has also just approached the degree of depth in hole.Real meter is gone up such dermatotome and can be formed or added surface treatment again by thin die stamping.

Claims

1, a kind of method for designing of stealthy product, its require on the dermatotome or on the product surface regularly solid matter end aperture is arranged, consume probing wave energy or change back wave direction thereby utilize the aperture inwall to make probing wave in the hole, produce repeatedly reflection.It is characterized in that the aperture inwall is and the uneven surface of dermatotome real surface.

2, arbitrary edge that the method for designing of saying according to claim 1, its feature also are aperture overlaps with the edge of other one or more apertures.

3, the method for designing of saying according to claim 1 is characterized in that the end of arbitrary aperture is not the plane.

4, the method for designing of saying according to claim 1 is characterized in that the other a certain hole wall in the normal of any point on the hole wall and same hole intersects.