RU2734342C1 - Collimator digital indicator - Google Patents

Abstract

FIELD: instrument engineering.

SUBSTANCE: invention relates to the electro-optical instrument-making, in particular, to the collimating aviation indicators (CAI) for displaying on the windshield the sign-graphic flight information. Collimator digital indicator (CDI) comprises a housing, a collimating head consisting of a semitransparent mirror and a system of optical lenses, a control panel connected through a collimating head with bundles to the housing, in which there is a liquid crystal imaging device (LCID), consisting of a display module, a backlight module and a display controller, an electronics unit consisting of a secondary voltage module, module of graphic processor, to the second inputs-outputs of which LCID inputs and outputs, display processor module and interface module are connected, which are connected by common inputs-outputs along data exchange lines and multiplex channel of information exchange (MCIE). Modules of the electronics unit mesonically connected along the perimeter by contact bushes with low-resistance conductive coating made of silver group metals have printed-circuit boards with external layers of polygon-type housing grounding, contact points of which with the housing are open from the mask.

EFFECT: technical result consists in simplification of design and reliability of collimator, reduction of dimensions.

8 cl, 5 dwg

Description

The technical solution relates to electronic-optical instrumentation, namely to aviation optical-electronic devices and, in particular, to aviation collimator indicators (KAI), designed to display signographic flight information on the windshield, formed against the background of the cockpit space.

The development of technical systems of aircraft requires an increase in the amount of information displayed on the collimator indicator, and, as a consequence, increased requirements for the quality of information display to create comfortable conditions for reading information and reduce fatigue.

Aviation collimator indicators and sights have long been known (see, for example, Aviation devices and measuring systems. Edited by VG Vorobiev [Textbook for students of GA universities]. - [Moscow]: Transport, 1981; Lazarev LP Optico- electronic guidance devices for aircraft. [Textbook for university students]. - Moscow: Mashinostronie, 1984).

Collimator indicators are widely known in which projection cathode-ray tubes are used as a high-brightness image generator (see, for example, "Optical system of a wide-angle collimator aviation indicator" "Optical journal", 76, 10, 2009: "Screen in the sky", Popular mechanics, No. 4, 2009, as well as "Electron-optical systems for collimator indicators", Electronics: science, technology, business, No. 4, 2003).

In collimator indicators containing an electronic unit, a cathode-ray tube, the emitting screen of which is located in the focal plane of the lens, containing two components, between which there is an optical element that breaks the optical axis, and a one / two-component translucent reflector, which is a translucent inclined mirrors located above the lens between the windshield of the aircraft and the pilot (see, RU 134673, 148261, 2325679, 2358302, 2364902 and 2431204, as well as US patent 5302964). A projection cathode-ray tube is used as an information display device, which requires high-voltage power supply (tens of kilovolts) and analog interfaces to function. In addition, cathode-ray tubes have limitations on the amount of information displayed on the screen, low quality of television images, limitations on the accuracy of the information displayed, large dimensions and a small resource.

Collimator indicator according to patent KR 20140111773 A, contains a two-component translucent reflector, with translucent inclined mirrors located at an angle to each other. However, this collimator indicator has a limited field of view and large dimensions of the collimator head, which complicates its placement in the helicopter cockpit.

The collimator indicator according to the US patent 9244275 forms an image from two liquid crystal screens, which complicates the process of image formation control and alignment to ensure a clear and high-quality display of information, which leads to a deterioration in its overall and mass parameters.

Although numerous technical solutions for collimator indicators are provided, there is no simple and reliable collimator digital indicator (CCD) with reduced dimensions and expanded functionality.

The problem to be solved by the claimed technical solution and the achieved technical result is to create a simple and reliable digital collimator indicator with reduced dimensions while expanding its functionality.

The creation of a simple and reliable digital collimator indicator (ICC) with reduced dimensions while expanding its functionality is ensured by the fact that the digital collimator indicator contains a housing, a collimator head consisting of a translucent mirror and a system of optical lenses, a control panel connected through the collimator head with harnesses to the housing , in which a liquid crystal imaging device (LCD) is located, consisting of an indication module, a backlight module and a display controller, an electronics unit consisting of a secondary voltage module, a graphics processor module, to the second inputs and outputs of which the inputs and outputs of the LCD are connected, a display processor module and an interface module, connected by common inputs-outputs along information exchange lines and a multiplex information exchange channel (MKIO), while the modules of the electronics unit, mezzanine connected along the perimeter by contact bushings with a low-resistance conductive coating, are made They are made of metals of the silver group, have printed circuit boards with outer layers of polygon type grounding, the contact points of which with the case are open from the mask.

This is facilitated by the fact that a reflective mirror is placed between the components of the optical lens system of the collimator head.

The technical result is also achieved by the fact that a multi-layer optical coating is applied to the collimator head lens, while the transmission spectrum of the lens coincides with the emission spectrum of narrow-band green and red sources from the backlight module.

Placing film heaters between the liquid crystal LCD screen and the collimator lens helps to simplify the design and improve reliability.

The fact that a light filter made of monocrystalline synthetic corundum with a multilayer conductive coating is installed on the front surface of the display module's liquid crystal screen, connected to the display module housing, provides a decrease in the thermal load on the display module at high ambient light levels, which, in turn, increases reliability and expands its functionality.

The technical result is achieved by placing light sources from the illumination module on a heat-dissipating printed circuit board with a metal base, which is attached to the radiator with screws and glue with a specific thermal conductivity selected from the range of 5 ... 10 W / mK.

The connection of four radial fans providing heat dissipation with a total power of up to 80 W to the radiator contributes to the reliable operation of the digital collimator indicator at an increased operating temperature, reduced dimensions and expanded its functionality.

Expansion of functionality is achieved by connecting a package of films placed in a frame and consisting of a diffuse-scattering film, microprismatic films with vertical and horizontal orientation and a polarizing film to the illumination module.

Featured on:

FIG. 1 - Digital collimator indicator;

FIG. 2 - Digital collimator indicator (bottom view);

FIG. 3 - Digital collimator indicator (view without cover);

FIG. 4 - Liquid crystal imaging device LCD;

FIG. 5 - Optical layout of the collimator head.

The digital collimator indicator (ICC) contains a housing (1), a collimator head (2) consisting of a semitransparent mirror (3) and a system of optical lenses (4), a control panel (5) connected through a collimator head (2) with harnesses (6) with a housing (1), which houses a liquid crystal imaging device (LCD) (7), consisting of an indication module (8), a backlight module (9) and a display controller (10), an electronics unit (11), consisting of a secondary voltage module (12), a graphics processor module (13), to the second inputs-outputs of which the inputs-outputs of the LCD (7), a display processor module (14) and an interface module (15) are connected, connected by common inputs-outputs via data exchange lines and multiplex information exchange channel (MKIO), while the modules of the electronics unit (11), mezzanine connected along the perimeter by contact bushings (16) with a low-resistance conductive coating made of metals of the silver group, have printed circuit boards with outer layers of housing polygon type grounding, the contact points of which with the body (1) are open from the mask.

A reflecting mirror (17) is placed between the components of the optical lens system (4) of the collimator head (2).

A multilayer optical coating is applied to the objective (18) of the collimator head (2), while the transmission spectrum of the objective (18) coincides with the emission spectrum of narrow-band sources (19) of green and red colors from the backlight module (9).

Film heaters (21) are placed between the liquid crystal screen (20) of the LCD (7) and the objective (18) of the collimator head (2).

On the front surface of the liquid crystal screen (20) of the display module (8), there is a light filter (22) made of monocrystalline synthetic corundum with a multilayer conductive coating, connected to the housing (23) of the display module (8).

Light sources from the illumination module (9) are placed on a heat-dissipating printed circuit board with a metal base (24), which is attached to the radiator (25) with screws (26) and glue with a specific thermal conductivity selected from the range of 5 ... 10 W / mK.

Four radial fans (27) are connected to the radiator (25), providing heat dissipation with a total power of up to 80 W.

A package of films (28) placed in a frame (29) and consisting of a diffuse-scattering film (30), microprismatic films (31) with vertical and horizontal orientation and a polarizing film (32) is connected to the illumination module (9).

ICC operates as follows.

ICC containing a housing (1) and providing the ability to observe a collimated image of information on a collimator head (2), consisting of a semitransparent mirror (3) and a system of optical lenses (4), against the background of the behind-the-cab space transmitted from the LCD (7), a control panel ( 5) connected through the collimator head (2) with harnesses (6) with the housing (1) and the electronics unit (11) and carrying out switching of operating modes, positioning of the aiming mark and adjusting the brightness of the image on the liquid crystal imaging device (LCD) (7) using switches and regulators, consisting of an indication module (8), a backlight module (9) and a display controller (10), which ensures the functioning of the LCD (7) in all operating modes, a secondary voltage module (12), which generates operating voltages for the modules included in the ICC , a graphics processor module (13) that performs processing, conversion of input signals and the formation of digital signographic information, which The eye inputs-outputs of which are connected to the inputs-outputs of the ZhKFI (7), displaying symbolic information on the screen, the display processor module (14) and the interface module (15), connected by common inputs-outputs along the information exchange lines and the multiplex information exchange channel (MKIO) ... A multilayer optical coating is applied to the objective (18) of the collimator head (2), while the transmission spectrum of the objective (18) coincides with the emission spectrum of narrow-band sources (19) of green and red colors from the illumination module (9) and makes it possible for the IRC to operate with devices night vision. Film heaters (21) are placed between the liquid crystal screen (20) of the LCD (7) and the objective (18) of the collimator head (2), which ensure the functioning of the LCD (7) at temperatures up to minus 40 ° C. The light sources from the backlight module (9) are located on a heat-dissipating printed circuit board with a metal base (24), which is attached to a radiator (25), to which four radial fans (27) are connected, providing heat dissipation with a total power of up to 80 W and the functioning of the LCD (7 ) at temperatures up to + 60 ° C.

Claims (8)

1. Digital collimator indicator (ICC), containing a housing, a collimator head consisting of a semitransparent mirror and a system of optical lenses, a control panel connected through the collimator head with bundles with a housing in which a liquid crystal imaging device (LCD) is located, consisting of an indication module, a backlight module and a display controller, an electronics unit consisting of a secondary voltage module, a graphics processor module, to the second inputs and outputs of which the inputs and outputs of the LCD, a display processor module and an interface module, connected by common inputs and outputs via data exchange lines and a multiplex channel information exchange, while the modules of the electronics unit, mezzanine connected along the perimeter by contact bushings with a low-resistance conductive coating made of silver-group metals, have printed circuit boards with outer layers of polygon-type casing grounding, the contact points of which with the casing are open from the mask. 2. ICC according to claim 1, in which a reflective mirror is placed between the components of the optical lens system of the collimator head. 3. IRC according to claim 2, in which a multilayer optical coating is applied to the objective of the collimator head, and the transmission spectrum of the objective coincides with the emission spectrum of narrow-band green and red sources from the backlight module. 4. ICC according to claim 1, in which film heaters are placed between the liquid crystal LCD screen and the lens of the collimator head. 5. ICC according to claim 1, in which a light filter made of monocrystalline synthetic corundum with a multilayer conductive coating is installed on the front surface of the liquid crystal display of the display module, connected to the housing of the display module. 6. ICC according to claim 1, in which the light sources from the illumination module are placed on a heat sink printed circuit board with a metal base, which is attached to the radiator with screws and glue with a specific thermal conductivity selected from the range of 5 ... 10 W / mK. 7. ICC according to claim 6, in which four radial fans are attached to the radiator, providing heat removal with a total power of up to 80 W. 8. ICC according to claim 6, in which a package of films placed in a frame and consisting of a diffuse-scattering film, microprismatic films with vertical and horizontal orientation and a polarizing film is connected to the illumination module.

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