CN104183203A - Instrument identifier for deep space probe - Google Patents

Abstract

The invention provides a device surface mark of a deep space detector, which is mainly composed of a polyimide film with a thickness of 125 μm and a surface synthetic paint, and the surface synthetic paint is printed on the polyimide film by a screen printing process Above; based on the weight of the surface synthetic coating as 100%, the chemical components and their weight percentages in the surface synthetic coating are: 55%-65% for silicone resin, 24%-36% for modified resin, organic pigment 3%-5%, additives 4%-8%. When the present invention selects base materials and surface synthetic coatings, environmental constraints such as space radiation, vacuum, moon dust, large high and low temperature differences, and mechanics are fully considered. Therefore, the selected synthetic coatings have high radiation resistance, strong high and low temperature resistance, and are High mechanical strength.

Description

Apparatus identification of a deep space probe

technical field

The invention belongs to the technical field of aerospace loads, and in particular relates to a device watch mark of a deep space probe.

Background technique

The logo is an important symbol of each spacecraft. Carrying the logo on the spacecraft has a certain degree of political significance and engineering display. According to the mission requirements of the lunar exploration project, my country's lunar probes need to carry various signs on the surface of the instrument, such as some kind of flag, and during the mission, the camera will image the signs carried to improve the display of the project.

At present, the logos carried on domestic and foreign spacecraft are mainly the flags of various countries, and the details are as follows:

On July 20, 1969, American astronaut Neil Armstrong stepped out of the lunar module of the "Apollo 11" spacecraft, leaving the first footprint of human beings on the surface of the moon, realizing the dream of human beings to land on the moon. During the "Apollo 11" moon landing mission of the United States, an American flag was planted on the surface of the moon, and in the subsequent six manned moon landing missions, a total of six American flags were planted on the moon. The flags planted by American astronauts on the moon are made of the same material as the flags used on the ground. Even the flags made of nylon fabric did not consider the impact of the high-intensity ultraviolet radiation environment on the moon, and the preservation time on the moon is not long.

At 16:40 on September 27, 2008, Chinese astronaut Zhai Zhigang successfully opened the door of the orbital module of the Shenzhou VII spacecraft. Against the background of the blue earth, Zhai Zhigang waved a Chinese flag in space to salute the people of the whole country , The dream of the Chinese people to go out of the cabin in space has come true. The national flag held by Zhai Zhigang is handmade on the surface of the fabric using cross-stitching techniques.

Whether it is the manned moon landing in the United States or my country's Shenqi VII, the logos displayed are the flags of various countries, and they are all completed with the participation of astronauts. From the perspective of logo design, neither of them considered the working conditions of the logo in the environment of strong radiation, high vacuum, and temperature for a long time, and did not consider the fading of the logo in the strong radiation environment, the large temperature change on the surface of the moon, and the vacuum. Whether the air out of the environment will bring pollution, the impact on other systems, etc.

However, my country's lunar probes are required to work in orbit for one year. During this period, the markings have to withstand many tests such as high and low temperature, strong radiation, and vacuum. For the development of markings under such harsh environmental conditions, no relevant research has been seen at home and abroad. reports.

At present, flags are mainly used to make signs for spacecraft at home and abroad. The conventional materials are cotton, wool, linen fabrics, chemical fiber fabrics, silk, paper, plastic, etc., in addition to metal materials and F46 film materials. Conventional materials do not have the space environment resistance performance that meets the requirements; the quality of metal materials is relatively large; although F46 film has good space environment resistance performance and light weight, F46 has very high chemical stability and is not easy to form a strong bond with other materials. Chemical bonds, it is difficult to prepare a high-adhesion coating on the surface of F46, which still cannot meet the requirements for making the lunar probe watch logo.

In addition, since the lunar probe is a deep-space probe, compared with the earth application satellite, its speed increment requirement is larger, and the increase in weight will sharply increase the demand for propellant. Therefore, the lunar probe has extremely strict requirements on the weight of its logo .

In order to overcome environmental constraints such as space radiation, vacuum, moon dust, high and low temperature differences, and mechanics, as well as resource constraints such as the weight and power consumption of deep space probes on marking devices, aiming at improving the engineering display of my country's lunar exploration, the ability to cooperate with camera imaging , a device identification for deep space detectors is proposed.

Contents of the invention

The purpose of the present invention is to overcome environmental constraints such as space radiation, vacuum, moon dust, high and low temperature differences, and mechanics, as well as resource limitations such as the weight and power consumption of the marking device for deep space probes, and aim at improving the engineering display of my country's lunar exploration. Cooperating with the imaging capability of the camera, a device identification for deep space detectors is proposed.

Technical solution of the present invention is:

A deep-space probe's instrument surface mark, which is mainly composed of a polyimide film with a thickness of 125 μm and a surface synthetic paint, and the surface synthetic paint is printed on the polyimide film by a screen printing process; The weight of the surface synthetic paint is calculated as 100%, and the chemical components and their weight percentages in the surface synthetic paint are: 55%-65% for organic silicon resin, 24%-36% for modified resin, and 3% for organic pigment -5%, the auxiliary agent is 4%-8%.

Further, the modified resin in the present invention includes silicon nitrogen resin, silicone modified polyester baking varnish, silicone amino baking varnish and fluorosilicon resin.

Further, the organic pigments of the present invention are organic pigment red 2030 and organic pigment yellow 4GLP.

Further, the auxiliary agent of the present invention includes an adhesion promoter and a curing accelerator, wherein the adhesion promoter is methacryloxy functional group silane or aminopropyl triethoxysilane, and the curing accelerator is isocyanate addition compounds, dimers, trimers or biurets.

Furthermore, the effective area of the pattern of the mark in the present invention is 480mm×320mm, and the edges in the four directions of the effective area of the pattern of the mark are all left with a width of 25mm.

Further, the organosilicon resin of the present invention accounts for 60% (weight) of the overall synthetic coating consumption, the silicon nitrogen resin accounts for 16% (weight) of the overall synthetic coating consumption, and the organosilicon modified polyester baking varnish accounts for 60% (weight) of the overall synthetic coating consumption. 8% (weight), silicone amino baking varnish accounts for 3% (weight) of the overall synthetic coating consumption, fluorosilicone resin accounts for 3% (weight) of the overall synthetic coating consumption; organic pigment accounts for 4% (weight) of the overall synthetic coating consumption ); the adhesion promoter accounts for 3% (weight) of the overall synthetic paint consumption; the curing accelerator accounts for 3% (weight) of the overall synthetic paint consumption.

Furthermore, after the mark of the present invention is treated with high temperature curing and degassing, it is fixed on the upper left corner of the cabin panel of the illuminated surface of the detector and the surface of the thermal control multi-layer heat insulation assembly with pins.

Beneficial effect:

(1) The present invention adopts polyimide film as the base material for making signs. Because polyimide film has the advantages of strong radiation resistance, high and low temperature resistance, and good film-forming quality, it can ensure the labeling of the device. stability of the space environment.

(2) The present invention selects the thickness of the polyimide film as 125 μm, and through test and verification, it not only has high mechanical strength, is not easy to produce appearance defects such as wrinkles, but also has better printing adaptability; Under the premise of clear patterns and clear patterns, light weight and no power consumption reduce the resource utilization of lunar exploration missions.

(3) When the present invention selects surface synthetic coatings, environmental constraints such as space radiation, vacuum, moon dust, high and low temperature differences, and mechanics are fully considered. Therefore, the selected synthetic coatings have high radiation resistance, strong high and low temperature resistance, and are resistant to The mechanical strength is high, and will not cause volatilization, fading, deformation, wrinkles, shedding, air bubbles, etc. due to the influence of the space environment, will not pollute the detector, and will not affect the thermal control of the detector surface. performance and device surface potential.

(4) The present invention fully considers the problem of matching the imaging effect of the camera on the detector when selecting the size and installation position of the logo, which improves the display degree of the project and has important political significance.

Description of drawings

Figure 1 is a schematic diagram of the detector table identification.

Figure 2 is a scale schematic diagram of the image taken by the detector and the sign on the camera when the distance from the sign is 18m.

Detailed ways

The present invention is described in detail below in conjunction with accompanying drawing and specific embodiment:

As shown in Fig. 1, a kind of device table mark of deep space detector of the present invention, this device table mark is the mark of a piece of single-sided thin film structure, the conductive polyimide film that is installed in the upper left corner of the cabin board of the detector illumination surface On the thermal control coating surface of the aluminum-plated secondary surface mirror, the size of the effective area of the logo pattern is 480mm×320mm, and the edges of the four directions of the effective area of the logo pattern are all left with a width of 25mm for easy installation. The logo is composed of polyimide film with a thickness of 125 μm and surface synthetic paint. The surface synthetic paint is printed on one side of the polyimide film by screen printing process. The logo is degassed by high temperature curing and fixed with pins. On the surface of the detector surface thermal control multi-layer insulation assembly and the deck.

(1) The material, process and installation method of the logo

a) The base material of the logo

The polyimide film that has been verified by space flight is selected as the base material for making signs, which can ensure the stability of the space environment of the base material. At the same time, the thickness of the substrate is 125 μm. It has been verified by experiments that it not only has high mechanical strength, is not prone to appearance defects such as wrinkles, but also has better printing adaptability. In addition, the base material of the thermal control multi-layer heat insulation component covered by the logo installation part is also polyimide film, and the logo adopts the same base material as the thermal control multi-layer heat insulation component, which can minimize the impact of the logo on thermal control. Effect of layer insulation components.

b) Labeled synthetic paints

Select base materials, pigments and additives that have strong radiation resistance, high temperature resistance, good film quality and can be cured and degassed by high temperature to prepare synthetic coatings for printing logos, so as to ensure the radiation resistance and high temperature resistance of the logos. Low temperature performance and presentation.

Base material: Select silicone resin, silicon nitrogen resin, silicone modified polyester baking varnish, silicone amino baking varnish, fluorosilicone resin, which are suitable for space applications, among which silicone nitrogen resin, silicone modified polyester Ester baking varnish, silicone amino baking varnish, and fluorosilicone resin are all modified resins, and the base material is prepared through process tests.

Pigment: Due to the temperature resistance and radiation resistance requirements of the logo pattern, choose a pigment with good stability, high light resistance and temperature resistance to ensure the color stability of the logo. Determine the ratio of pigments through color comparison analysis with standard color samples. Through the color comparison analysis with the standard color sample and the process test, organic pigment red 2030 and organic pigment yellow 4GLP were selected to prepare the pigment.

Preparation of synthetic paint: On the basis of selected base materials and pigments, additives to improve adhesion and curing are added to prepare red and yellow synthetic paints respectively. Auxiliaries include adhesion promoters and cure accelerators, where adhesion promoters such as methacryloxy functional silane or aminopropyltriethoxysilane are added to make the coated polyimide film more durable. High bonding strength, improve the ability to resist ultraviolet radiation and high and low temperature resistance; add curing accelerators, such as: isocyanate adducts or dimers, trimers, biurets, to improve the film-forming quality of coatings.

In the sign synthetic paint, the ratio of main components is as follows: silicone resin accounts for 55%-65% (weight) of the overall synthetic paint consumption, preferably 60% (weight); modified resin accounts for 24% of the overall synthetic paint consumption %-36% (weight), wherein silicon nitrogen resin accounts for 14%-18% (weight) of overall synthetic paint consumption, is preferably 16% (weight), and organosilicon modified polyester baking varnish accounts for 6%- 10% (weight), preferably 8% (weight), organosilicon amino baking varnish accounts for 2%-4% (weight) of the overall synthetic paint consumption, preferably 3% (weight), fluorosilicone resin accounts for the overall synthetic paint consumption 2%-4% (weight), preferably 3% (weight); organic pigments account for 3%-5% (weight) of the overall synthetic coating, preferably 4% (weight); adhesion promoters account for the overall synthetic coating 2%-4% (weight) of the coating amount, preferably 3% (weight); the curing accelerator accounts for 2%-4% (weight) of the overall synthetic coating amount, preferably 3% (weight).

Example 1:

In the synthetic coating for signs, the ratio of the main components is as follows: silicone resin accounts for 55% (weight) of the overall synthetic coating; modified resin accounts for 36% (weight) of the overall synthetic coating; organic pigments account for the overall synthetic coating. The dosage is 5% (weight); the auxiliary agent is 4% (weight).

Example 2:

In the sign synthetic paint, the ratio of the main components is as follows: silicone resin accounts for 65% (weight) of the overall synthetic paint consumption; modified resin accounts for 24% (weight) of the overall synthetic paint consumption; organic pigments account for the overall synthetic paint consumption The amount of 5% (weight); auxiliary agent is 6% (weight).

Example 3:

In the sign synthetic paint, the ratio of the main components is as follows: silicone resin accounts for 65% (weight) of the overall synthetic paint consumption; modified resin accounts for 24% (weight) of the overall synthetic paint consumption; organic pigments account for the overall synthetic paint consumption The dosage is 3% (weight); the auxiliary agent is 8% (weight).

Example 4:

In the sign synthetic paint, the ratio of the main components is as follows: silicone resin accounts for 60% (weight) of the overall synthetic paint consumption; modified resin accounts for 30% (weight) of the overall synthetic paint consumption; organic pigments account for the overall synthetic paint consumption The dosage is 3% (weight); the auxiliary agent is 7% (weight).

Example 5:

In the logo synthetic paint, the ratio of the main components is as follows: silicone resin accounts for 58% (weight) of the overall synthetic paint consumption; modified resin accounts for 30% (weight) of the overall synthetic paint consumption; organic pigments account for the overall synthetic paint consumption The amount of 4% (weight); auxiliary agent is 8% (weight).

c) Screen printing process of logo pattern

In order to ensure the printing effect of the synthetic coating on the polyimide film, the screen printing process is used to print the logo pattern. The screen printing process shows good printing adaptability. The color and coating of the logo pattern printed on the polyimide film are uniform, and the surface is uniform and flawless in large-area coating, and the tolerance control meets the requirements of the national standard.

d) Degassing treatment of the logo

In order to reduce the outgassing of the label under vacuum conditions and avoid contamination of the detector as much as possible, the high temperature curing method is used to degas the label. Synthetic coatings have excellent high and low temperature resistance, and can achieve precise high temperature curing. During the baking process, small molecular materials and molecules that are not firmly bonded to the main chain can escape from the surface of the paint film. It has less mass loss during vacuum outgassing and outgassing. It is relatively thorough and has the characteristics of less residual low molecular compounds.

e) The installation method of the logo

The logo is fixed on the surface of the thermal control multi-layer heat insulation component of the detector surface and the deck by pins. The distance between the pin and the edge of the effective area of the logo is 10mm. After installation, the logo should be flat and free of wrinkles.

(2) The configuration structure of the logo

Since the lunar probe is a deep-space probe, compared with the earth application satellite, its speed increment requirement is relatively large, and the increase in weight will sharply increase the demand for propellant. Therefore, the lunar probe has extremely strict requirements on the weight of the identification device carried . Under the condition of limited weight and power consumption, the logo cannot have auxiliary devices such as support rods, deployment mechanisms, and fixing frames. Only a single-sided film structure logo can be selected to attach to the detector surface.

(3) The installation position and size of the logo

Considering the lighting conditions of the logo, the logo should be installed at the upper left corner of the illuminated panel of the detector.

For the convenience of description, an example of using a flag as a logo is as follows. In order to display the flag completely and accurately, the installation position of the flag must be flat and cannot be blocked or covered by other equipment or devices. The size of the upper left corner of the illuminated panel of the detector is 1420mm×706.8mm, and the maximum size of the area where the flag can be installed is 900mm×380mm. According to the layout and proportion requirements of the flag standard, a certain amount of installation space should be considered. , The effective area of the pattern of the flag is 480mm×320mm, and the edges of the effective area of the pattern of the flag are left with a width of 25mm for easy installation. In addition, the flag also needs to cooperate with the ability of the camera to image in order to improve the display of the project.

Field of view of the camera used to shoot the detector table flag: 19.7°×14.5°; effective number of pixels: 2352pixel×1728pixel. The size of the detector is 5.68m×2.58m (the solar wing is deployed). The size of the flag on the detector table is 480mm (W) × 320mm (H), so the diameter of the small circle in the flag pattern is 32mm, and the diameter of the large circle is 96mm. According to the above parameters, Table 1 can be calculated.

Table 1 The imaging effect of the camera shooting the flag at different distances

a) When the distance from the flag is 3m to 10m, the single image taken by the camera cannot completely cover the detector, and multiple images can be stitched together. When the distance from the flag is 10m, considering that the overlap rate of the field of view required for image stitching is 20%, the calculation requires 6 image stitching to capture a complete detector. The flag occupies 324pixel×216pixel in the image, the diameter of the small circle occupies 21pixel in the image, and the outline is clear.

b) When the distance from the flag is 18m, the field of view of the panoramic camera is 6.26m×4.61m, and the pixel resolution is 2.66mm. At this time: a single image can capture the entire detector, and the detector occupies 2135pixel×970pixel in the image. Clear outline. You can see the main components such as gas cylinders, and you can clearly distinguish their details; the flag occupies 180pixel×120pixel in the image, and the diameter of the small circle occupies 12pixel in the image, with a clear outline. The scale diagram of the image taken by the detector and the flag in the panoramic camera is shown in Figure 2.

c) When the distance from the flag is 50m, the field of view of the panoramic camera is 17.4m×12.8m, and the pixel resolution is 7.4mm. At this time: a single image can capture the whole detector, and the detector occupies 768pixel×349pixel in the image, and the outline clear. The main components such as the gas cylinder can be seen; the flag occupies 64pixel×43pixel in the image, and the outline is visible. The diameter of the small circle occupies 4pixels in the image, and the outline is visible.

d) When the distance from the flag is 100m, the detector occupies 384pixel×175pixel in the image, the pixel resolution is 14.8mm, the outline is clear, the flag occupies 32pixel×21pixel in the image, and the outline is visible.

After analysis, the size of the flag matches the imaging capability of the camera, which can meet the display requirements of the project.

The banner described in the present invention is only a specific implementation of the logo, and the logo can be various flags, such as the flags of various countries, or the flags of various social groups, such as the flags of various parties, groups, trade unions, etc.; For any other commemorative patterns, icons, symbols, etc., without limitation.

To sum up, the above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (8)

1. A device watch mark for a deep space detector, characterized in that it is mainly composed of a polyimide film and a surface synthetic coating with a thickness of 125 μm, and the surface synthetic coating is printed on polyimide by a screen printing process. On the imine film; based on the weight of the surface synthetic coating as 100%, the chemical components and their weight percentages in the surface synthetic coating are: 55%-65% for organic silicon resin, and 24%-36% for modified resin , 3%-5% for organic pigments, 4%-8% for additives. 2 . The instrument mark of the deep space probe according to claim 1 , wherein the modified resin comprises silicon nitrogen resin, silicone modified polyester baking varnish, silicone amino baking varnish and fluorosilicon resin. 3. according to claim 2 said deep-space probe device table mark, it is characterized in that, described auxiliary agent is made up of adhesion promoter and curing accelerator, and wherein adhesion promoter is methacryloxy functional group silane Or aminopropyltriethoxysilane, and the curing accelerator is isocyanate adduct, dimer, trimer or biuret. 4. according to the device table mark of the described deep space probe of claim 3, it is characterized in that, organic silicon resin accounts for 60% (weight) of overall synthetic paint consumption, and silicon nitrogen resin accounts for 16% (weight) of integral synthetic paint consumption , silicone modified polyester baking varnish accounts for 8% (weight) of the overall synthetic coating consumption, organosilicon amino baking varnish accounts for 3% (weight) of the overall synthetic coating consumption, and fluorosilicone resin accounts for 3% (weight) of the overall synthetic coating consumption ); organic pigments account for 4% (weight) of the overall synthetic paint consumption; adhesion promoters account for 3% (weight) of the overall synthetic paint consumption; curing accelerators account for 3% (weight) of the overall synthetic paint consumption. 5. According to claim 1 or 4, said deep-space probe's instrument mark, it is characterized in that, said organic pigment is organic pigment red 2030 and organic pigment yellow 4GLP. 6. according to claim 1 or 4 described deep-space detector instrument table mark, it is characterized in that, the pattern effective area of described mark is 480mm * 320mm, and the edge of four directions of the pattern effective area of described mark all leaves Has 25mm width fringe. 7. According to one of claims 1-3, the instrument mark of the deep space detector is characterized in that, after the mark is treated with high-temperature curing and degassing, it is fixed on the upper left corner of the illuminating surface deck of the detector and the thermal control the surface of the multi-layer insulation assembly. 8. According to the instrument mark of the deep space probe according to any one of claims 1-4, the mark is characterized in that, the mark is a flag.