CN102121661A - A navigation light for navigation light's reflecting surface cover and use this reflecting surface cover - Google Patents
A navigation light for navigation light's reflecting surface cover and use this reflecting surface cover Download PDFInfo
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- CN102121661A CN102121661A CN2010106007650A CN201010600765A CN102121661A CN 102121661 A CN102121661 A CN 102121661A CN 2010106007650 A CN2010106007650 A CN 2010106007650A CN 201010600765 A CN201010600765 A CN 201010600765A CN 102121661 A CN102121661 A CN 102121661A
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- 229910052736 halogen Inorganic materials 0.000 claims description 5
- 150000002367 halogens Chemical class 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000013461 design Methods 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000003384 imaging method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D47/00—Equipment not otherwise provided for
- B64D47/02—Arrangements or adaptations of signal or lighting devices
- B64D47/06—Arrangements or adaptations of signal or lighting devices for indicating aircraft presence
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D2203/00—Aircraft or airfield lights using LEDs
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- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
A position light comprising: the reflecting face cover and the transparent lamp cover are connected into a whole and fixed on the bottom plate together, the light source is arranged on the bottom plate and close to the reflecting face cover, and light rays emitted by the light source are reflected by the reflecting face cover and then emitted from the transparent lamp cover. The position light has a compact structure and reduces aerodynamic influence on the premise of ensuring light distribution.
Description
Technical Field
The invention relates to the field of aviation lighting, in particular to a structural design of a navigation light.
Background
In the field of aircraft, position lights are used to mark the direction of flight of an aircraft and provide navigational information to surrounding aircraft. Generally, the navigation light system must include a front navigation light composed of a left red light and a right green light, and a rear navigation light which is a white light.
The current navigation light products include two categories of halogen lights or LEDs, wherein the LED light source has the characteristics of high efficiency, long service life, high reliability and the like, so that the LED navigation light is becoming the development trend of the navigation light.
To meet the airworthiness requirements, rear navigation lights using white light LEDs are typically mounted at the end of the aircraft tail cone, near the exhaust of the APU (Auxiliary Power unit). With conventional APU mufflers, the temperature at this location is typically around 100 ℃. Such temperature conditions are still acceptable for conventional halogen lamps. As technology develops, customer requirements for aircraft noise figures become more stringent, forcing aircraft to increasingly incorporate integrated mufflers. The silencer uses the rear section of the tail cone as the cavity of the silencer, but the temperature near the exhaust port is as high as about 200 ℃, which exceeds the normal working temperature of the halogen lamp. And the LED light source is a light source which is very sensitive to temperature, and the ambient temperature can not be higher than 90 ℃ in normal operation, so that the LED light source cannot bear the high temperature. Even if the temperature at the location where the light source is installed is reduced to a suitable range by some thermal insulation measures, it is very difficult to wire the light source electrically accordingly. It is therefore desirable to consider the installation of rear position lights on both sides of the APU.
However, if the existing rear position lights are installed on both sides of the tail of the fuselage, the light intensity distribution of the position lights cannot meet the requirements of airworthiness regulations.
Disclosure of Invention
The invention relates to a reflecting mask for a navigation light, which can enable the navigation light to have a compact structure and reduce pneumatic influence on the premise of ensuring light distribution after being assembled with the navigation light.
To achieve the above object, the present invention provides a reflective face mask for a position light, which receives and reflects light emitted from a light source of the position light, wherein a reflective surface of the reflective face mask is formed by three-dimensionally rotating a curve R, which is denoted as R (Φ), around an axis in a cylindrical coordinate system (R, Φ), wherein:
r ═ const · exp ([ integral ] tan α d Φ) ═ R (Φ), and Pi(φ)·dφ＝P0(θ). d θ; wherein,
the const is a constant number that is,
Pi(phi) is the light intensity distribution emitted by the light source,
P0(theta) is a light intensity distribution obtained after passing through the reflecting surface,
phi is an included angle between the emergent ray of the light source and the axis;
theta is the included angle between the light reflected by the reflecting surface and the axis.
In particular, when the light intensity distribution of the light source is constant, i.e. Pi(φ)＝PiThe light intensity distribution of the emergent light is more than 0 and less than theta1Also constant within the range, i.e. P0(θ)＝P0Then, the following linear relationship exists between cos θ and cos φ:
cos θ ═ acos φ + b, where
In addition, the present invention also provides a position light, comprising: the reflecting face cover and the transparent lamp cover are connected into a whole and fixed on the bottom plate together, the light source is arranged on the bottom plate and close to the reflecting face cover, and light rays emitted by the light source are reflected by the reflecting face cover and then emitted from the transparent lamp cover. The reflective surface of the reflective mask is formed by a three-dimensional rotation about an axis of a curve R, denoted as R (phi) in a cylindrical coordinate system (R, phi), wherein:
r ═ const · exp ([ integral ] tan α d Φ) ═ R (Φ), and Pi(φ)·dφ＝P0(θ). d θ; wherein,
Pi(phi) is the light intensity distribution emitted by the light source,
P0(theta) is a light intensity distribution obtained after passing through the reflecting surface,
phi is an included angle between the emergent ray of the light source and the axis;
theta is the included angle between the light reflected by the reflecting surface and the axis.
In particular, when the light intensity distribution of the light source is constant, the function of the curve R of the reflecting surface has the following relationship, namely cos θ ═ acos Φ + b, where:
more preferably, an embodiment of the present invention further provides a navigation light with a more compact structure, wherein a reflective layer is further disposed on the bottom plate, and light emitted by the light source reaches the reflective layer after being reflected by the emission mask, and is emitted from the transparent lampshade after being reflected again by the reflective layer.
In particular, the light source is a halogen lamp light source or an LED light source.
In particular, the base plate may also be a substrate with a metal heat sink.
In particular, the light source is fixed to the base plate by means of mechanical connection or welding.
Particularly, the included angle between the connecting point of the reflecting face mask and the transparent face mask and the connecting point of the reflecting face mask and the bottom plate is 60-80 degrees. More preferably, the included angle is 70 °.
The navigation light can be arranged on two sides of the tail section of the machine body in a side-mounting mode due to the compact structure, so that a high-temperature area at the tail part is effectively avoided, and the navigation light can ensure the light distribution while the structure is compact due to the special reflecting curved surface of the lampshade
Drawings
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic illustration of another embodiment of the present invention;
FIG. 3 is a schematic view of the installation of the position light of the present invention.
Detailed Description
As shown in fig. 1, the present invention provides a position light 7 including: the LED lamp comprises a light source 1, a transparent lampshade 2, a reflecting face shield 3 and a bottom plate 4, wherein the reflecting face shield 3 and the transparent lampshade 2 are connected into a whole and fixed on the bottom plate 4 together, the light source 1 is arranged on the bottom plate 4 and close to the reflecting face shield 3, and light rays emitted by the light source 1 are reflected by the reflecting face shield 3 and then emitted out of the transparent lampshade 2.
In order to make the navigation light 7 of the invention compact and to reduce aerodynamic effects while ensuring light distribution, the mask of the invention is specially designed.
The light intensity distribution of a white light navigation light system must meet the minimum requirements described below, and the actual light intensity must be increased by a certain margin with respect to the minimum requirements in consideration of light attenuation during use.
The minimum light intensity in the horizontal plane of the white light position light is shown in table 1.
TABLE 1 minimum light intensity requirement in the horizontal plane
In addition, the minimum light intensity in the vertical plane of the white light position light is shown in Table 2.
TABLE 2 minimum light intensity requirement in vertical plane
The maximum intensity of the white light incorporated into the right and left dihedral angles is shown in table 3.
TABLE 3 maximum incorporation intensity requirement
In the embodiment of the invention, according to the light intensity distribution requirements of the white light navigation lights shown in the tables 1 to 3 and the light distribution characteristics of the white light LED, a non-imaging optical design method is adopted to obtain the secondary reflection curved surface meeting the requirements.
In the range of LED irradiation, the area A is a light intensity coverage area of the white light LED navigation light, the area B is a forbidden area, and no light intensity exists, so that the light emitted by the LED is converted by the reflecting face mask 3, and the light can be converted into the light in the area A.
According to a two-dimensional non-imaging optical design method, a profile curve can be obtained by solving the track of the curve through an equation.
This curve is rotated three-dimensionally (-90 ° - +90 °) about the axis (x direction) to form a surface of revolution. Then, a cutting line is formed in the XZ plane, the cutting line is infinitely extended along the ± z axis direction to obtain a cutting plane, then the cutting plane is used to cut the rotating curved surface to obtain a rotating curved surface, a part of the rotating curved surface with the radian less than 70 degrees is cut, and the remaining part after the cutting and the cutting becomes the reflecting surface of the reflecting face mask 3.
Two-dimensional non-imaging optical design methods are discussed in detail below. The design method is based on a two-dimensional given light distribution. The two-dimensional given light distribution is a light distribution with rotational or translational symmetry.
In a two-dimensional non-imaging optical design, there is a main section in which the direction and distribution of light rays is not changed regardless of rotation or translation, so that a two-dimensional curve can be designed using this main section, and then the two-dimensional curve is rotated or translated to obtain an optical system capable of forming a given light distribution.
First, the coordinates of points on the curve R for forming a curved surface are expressed by cylindrical coordinates (R, Φ), and then the differential expression of the reflection law is:
further obtaining:
R＝const·exp(∫tanαdφ)＝R(φ) (3)
theoretically, for any outgoing light distribution and incoming light distribution, the dependence θ (φ) should exist, so that the reflection curve profile R (φ) can be obtained only by solving equation (2).
For a two-dimensional system, the entire optical system extends congruently along the z-axis. At this time, it is assumed that the light is emitted from the light sourceThe emitted light has a light intensity distribution of Pi(phi), light intensity distribution obtained after passing through two-dimensional light reflecting surface is P0(θ), then according to the conservation of energy, the two must have the following relationship:
Pi(φ)·dφ＝P0(θ)·dθ (4)
now, a simplest case will be discussed, i.e. the light intensity distribution of the light source is constant, i.e. Pi(φ)＝PiMeanwhile, the emergent light intensity is distributed in the range of 0 < theta1Also constant within the range, i.e. P0(θ)＝P0. Substituting formula (4) and considering boundary condition theta (phi) & gtnon & gtφ＝0When the ratio is 0, the following is obtained:
by substituting the formula (5) into the formula (3), the cross-sectional shape of the curved reflecting surface in this case can be obtained:
wherein R is0Is the value of R at phi-0,
for a rotationally symmetric system, the whole system takes the y-axis as the axis of rotational symmetry. Similar to a two-dimensional system, the differential relationship between the incident light field and the emergent light field can also be obtained according to energy conservation:
Pi(φ)·d(cosφ)＝P0(θ)·d(cosθ) (7)
consider also the simplest case Pi(φ)＝Pi，P0(θ)＝P0(0＜θ＜θ1) Then, there should be a linear relationship between cos θ and cos φ as follows:
cosθ＝acosφ+b (8)
considering such boundary condition theta (phi) & ltY & gt φ＝00 and
then a and b:
by substituting the equations of equations (8) to (10) into equation (3), one meridian plane profile equation R ═ R (Φ) of the rotationally symmetric light reflecting surface can be obtained. Solving this equation requires the use of numerical solutions.
According to the above method, in one embodiment of the invention, the reflecting surface of the reflecting face mask 3 is formed by a three-dimensional rotation around an axis of a curve R, denoted as R (Φ) in a cylindrical coordinate system (R, Φ), wherein:
r ═ const · exp ([ integral ] tan α d Φ) ═ R (Φ), and Pi(φ)·dφ＝P0(θ). d θ; wherein,
the const is a constant number that is,
Pi(phi) is the light intensity distribution emitted by the light source 1,
P0(theta) is a light intensity distribution obtained after passing through the reflecting surface,
phi is an included angle between the emergent ray of the light source 1 and the axis;
theta is the included angle between the light reflected by the reflecting face mask 3 and the axis.
In a preferred embodiment of the invention, when the light intensity distribution of the light source 1 is constant, i.e. Pi(φ)＝PiThe light intensity distribution of the emergent light is more than 0 and less than theta1Also constant within the range, i.e. P0(θ)＝P0Then, the following linear relationship exists between cos θ and cos φ:
cos θ ═ acos φ + b, where
In addition, as shown in fig. 2, in a preferred embodiment of the navigation light 7 of the present invention, a reflective layer 5 is further disposed on the bottom plate, and the light 6 emitted from the light source 1 reaches the reflective layer 5 after being reflected by the emission mask 3, and is emitted from the transparent lampshade 2 after being reflected again by the reflective layer 5.
Fig. 3 shows a specific use of the navigation light according to the invention, in which the navigation light 7 according to the invention is mounted as a rear navigation light on both sides of the aircraft tail 9, the light intensity distribution region 8 of which covers substantially the entire rear of the aircraft, as shown in fig. 3, meeting the requirements of the airworthiness regulations.
While the technical content and the technical features of the invention have been disclosed, it is understood that those skilled in the art can make various changes and modifications to the above structure under the spirit of the invention, and all fall within the scope of the invention. The above description of embodiments is intended to be illustrative, and not restrictive, and the scope of the invention is defined by the appended claims.
Claims (10)
1. A reflective face mask for a position light, which receives and reflects light emitted from a light source of the position light, wherein a reflective surface of the reflective face mask is formed by three-dimensionally rotating a curve R, denoted as R (Φ), in a cylindrical coordinate system (R, Φ), about an axis, wherein:
r ═ const · exp ([ integral ] tan α d Φ) ═ R (Φ), and Pi(φ)·dφ＝P0(θ). d θ; wherein,
the const is a constant number that is,
Pi(phi) is a light sourceThe light intensity of the emergent light is distributed as,
P0(theta) is a light intensity distribution obtained after passing through the reflecting surface,
phi is an included angle between the emergent ray of the light source and the axis;
theta is the included angle between the light reflected by the reflecting face mask and the axis.
2. The reflecting face mask according to claim 1, wherein when the light intensity distribution of said light source is constant, P isi(φ)＝PiThe light intensity distribution of the emergent light is more than 0 and less than theta1Also constant within the range, i.e. P0(θ)＝P0Then, the following linear relationship exists between cos θ and cos φ:
cos θ ═ acos Φ + b, where,
3. a position light, comprising: the reflecting lamp comprises a light source, a transparent lampshade, the reflecting face shield as claimed in claims 1-2 and a bottom plate, wherein the reflecting face shield and the transparent lampshade are connected into a whole and fixed on the bottom plate together, the light source is arranged on the bottom plate and close to the reflecting face shield, and light rays emitted by the light source are reflected by the reflecting face shield and then emitted from the transparent lampshade.
4. The position light of claim 3, wherein a reflective layer is further disposed on the bottom plate, and the light emitted from the light source reaches the reflective layer after being reflected by the emission mask, and is emitted from the transparent cover after being reflected again by the reflective layer.
5. A position light according to claim 3 or 4, wherein the light source is a halogen light source or an LED light source.
6. The position light of claim 3 or 4, wherein the base plate is a substrate with a metal heat sink.
7. Navigation light according to claim 3 or 4, characterised in that the light source is fixed to the base plate by means of mechanical connection or welding.
8. A position light according to claim 3 or 4, wherein the line connecting the reflecting face mask to the transparent face mask to the point connecting the reflecting face mask to the base plate makes an angle of 60 ° to 80 ° with the base plate.
9. The position light of claim 8, wherein the included angle is 70 °.
10. A navigation light mounting arrangement according to claims 1-9, wherein the navigation light is mounted on both sides of the aft fuselage.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106007650A CN102121661B (en) | 2010-12-20 | 2010-12-20 | A navigation light for navigation light's reflecting surface cover and use this reflecting surface cover |
| PCT/CN2011/079637 WO2012083733A1 (en) | 2010-12-20 | 2011-09-14 | Reflective mask for navigation light and navigation light using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106007650A CN102121661B (en) | 2010-12-20 | 2010-12-20 | A navigation light for navigation light's reflecting surface cover and use this reflecting surface cover |
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| Publication Number | Publication Date |
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| CN102121661A true CN102121661A (en) | 2011-07-13 |
| CN102121661B CN102121661B (en) | 2013-05-29 |
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| CN2010106007650A Active CN102121661B (en) | 2010-12-20 | 2010-12-20 | A navigation light for navigation light's reflecting surface cover and use this reflecting surface cover |
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| WO (1) | WO2012083733A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012083733A1 (en) * | 2010-12-20 | 2012-06-28 | 中国商用飞机有限责任公司 | Reflective mask for navigation light and navigation light using same |
| CN104718134A (en) * | 2012-10-11 | 2015-06-17 | 空中客车德国运营有限责任公司 | Visual signalling of an aircraft |
| CN108916808A (en) * | 2017-01-31 | 2018-11-30 | 意大利汽车照明股份公司 | The lighting device for vehicle with aesthstic exposure mask |
| WO2022095051A1 (en) * | 2020-11-09 | 2022-05-12 | 深圳市大疆创新科技有限公司 | Arm and rack for unmanned aerial vehicle, and unmanned aerial vehicle |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2924340B1 (en) | 2014-03-28 | 2019-05-01 | Goodrich Lighting Systems GmbH | Exterior light unit for an aircraft or other vehicle and aircraft comprising the same |
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2010
- 2010-12-20 CN CN2010106007650A patent/CN102121661B/en active Active
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2011
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Cited By (6)
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|---|---|---|---|---|
| WO2012083733A1 (en) * | 2010-12-20 | 2012-06-28 | 中国商用飞机有限责任公司 | Reflective mask for navigation light and navigation light using same |
| CN104718134A (en) * | 2012-10-11 | 2015-06-17 | 空中客车德国运营有限责任公司 | Visual signalling of an aircraft |
| US9950811B2 (en) | 2012-10-11 | 2018-04-24 | Airbus Operations Gmbh | Visual signalling of an aircraft |
| CN108916808A (en) * | 2017-01-31 | 2018-11-30 | 意大利汽车照明股份公司 | The lighting device for vehicle with aesthstic exposure mask |
| CN108916808B (en) * | 2017-01-31 | 2023-04-14 | 意大利汽车照明股份公司 | Lighting device for vehicle with aesthetic mask |
| WO2022095051A1 (en) * | 2020-11-09 | 2022-05-12 | 深圳市大疆创新科技有限公司 | Arm and rack for unmanned aerial vehicle, and unmanned aerial vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012083733A1 (en) | 2012-06-28 |
| CN102121661B (en) | 2013-05-29 |
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