CN109828621B - Thermal control structure of ultralow-temperature low-energy detector - Google Patents
Thermal control structure of ultralow-temperature low-energy detector Download PDFInfo
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- CN109828621B CN109828621B CN201910141771.5A CN201910141771A CN109828621B CN 109828621 B CN109828621 B CN 109828621B CN 201910141771 A CN201910141771 A CN 201910141771A CN 109828621 B CN109828621 B CN 109828621B
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Abstract
The invention provides a thermal control structure of an ultralow temperature low-energy detector, which comprises: a low-energy detector lower case; the low-energy detector upper case comprises a mounting plate and a light shield fixedly connected to the mounting plate, wherein a slot for accommodating the collimator and the detector is formed in the mounting plate, and the slot is separated by a plurality of separating edges; the detector is fixedly arranged in the open slot of the mounting plate; the collimator is arranged in the slot and is superposed on the detector; the mounting plate is fixed on the simulation upper plate, and the simulation upper plate separates the lower case of the low-energy detector from the upper case of the low-energy detector; the U-shaped bottom of the U-shaped heat pipe is uniformly laid on the separation edges, and two ends of the U-shaped heat pipe extending upwards extend along the inner wall of the light shield; and one end of the L-shaped heat pipe is uniformly laid on the separation edge, and the end of the L-shaped heat pipe extending upwards extends along the inner wall of the light shield.
Description
Technical Field
The invention relates to the technical field of thermal control of low-energy detectors, in particular to a thermal control structure of an ultralow-temperature low-energy detector.
Background
LE (low-energy) thermal control is a very important key technology for a low-energy X-ray telescope, and the significance of the LE thermal control is to ensure the low temperature required by the normal work of an LE detector SCD, ensure the heating of the SCD after the entry to the rail to avoid the pollution problem and also ensure the higher starting temperature of the LE detector case electronics. The SCD detector has good and stable performance in the range of low temperature ranging from minus 80 ℃ to minus 45 ℃, and when the temperature exceeds minus 45 ℃, the dark current can be obviously increased, and the energy resolution of the detector is deteriorated. The SCD package is not completely closed, and the SCD is sensitive to pollutants, and needs to be heated first after the satellite enters the orbit through thermal control, so as to avoid adsorbing the pollutants due to low temperature. Because the lower case of the LE detector is subjected to radiation heat dissipation treatment, the temperature of the lower case is lower than the lowest starting temperature (-40 ℃) of electronics after the satellite enters the orbit, and the starting temperature of the electronics is required to be ensured to be higher than minus 40 ℃ through thermal control.
The technical difficulty of thermal control is as follows: 1. the track external heat flow environment is severe: firstly, an LE detector is arranged outside a satellite, the low temperature of the LE detector is required to be-80 to-45 ℃, the change of external heat flow is very sensitive, the orbit height selected by an HXMT satellite is only 550km, and the conditions of earth infrared and external heat flow reflected by a load on an observation device are severe, particularly the conditions of the earth infrared heat flow. At present, foreign similar X-ray astronomical satellites mostly have high orbits more than 7000km to avoid the influence of earth infrared and external heat flow of back illumination, or active refrigeration for local thermoelectric refrigeration of the detector is adopted to realize the low-temperature requirement of the detector. Under the condition that the HXMT satellite can only adopt a passive radiation heat dissipation thermal control measure at present, the thermal control design required by LE low temperature is very difficult.
2. Integrative installation overall arrangement of many loads: for an HXMT satellite payload, in order to ensure the precision requirement of a detector, HE, ME and LE detectors with different temperature requirements are all intensively installed on the same main supporting structure, and the difference of the maximum temperature index requirement reaches 70 ℃. The integrated installation layout of the multiple loads ensures that the loads with different temperature requirements are strongly thermally coupled, and on the premise of meeting the structural strength and rigidity, the realized heat insulation measures are limited, which brings great difficulty for three types of detectors, namely HE, ME and LE, to meet the temperature requirements simultaneously.
3. The HXMT satellite mainly has two working modes, namely an observation mode for patrolling the sky and a fixed point observation mode, the proportion of the two modes in the whole service life of the satellite is about 50%, the posture of the satellite is varied in the two working modes, the change of external heat flow borne by a load is quite complex, particularly for the fixed point observation mode, the observation time of the satellite according to an observer target can be up to several days, the conditions that the LE is subjected to earth infrared and the heat flow outside the albedo is severe exist.
4. Payload temperature stability requirements: the LE detector is in an approximately exposed state off-board, and under the complex external thermal current state of the HXMT satellite, if no effective thermal control measures are taken, the temperature fluctuation of the LE detector will inevitably exceed the required temperature range.
5. Probe and electronics heating requirements: the LE detector needs to be heated after the satellite enters the orbit to ensure that the temperature of the LE detector is higher than that of other surrounding parts, and the LE detector cannot be adsorbed on the LE detector when pollutants of other parts volatilize. Because the LE detector carries out good heat conduction and heat dissipation heat control measures, the temperature of the LE detector is lower than that of other surrounding components when the LE detector normally works. Higher power consumption is required if the LE detector needs to be heated to a higher temperature, while the heating band needs to be as close to the detector as possible. The outer wall of the lower case of the LE detector is provided with a radiation heat dissipation coating at present, so that the auxiliary heat dissipation function is achieved, and heat leakage of the upper case of the LE detector is reduced. However, the electronics of the chassis under the LE detector can be normally started up to work only at the temperature of more than 40 ℃ below zero, so preheating is needed. These all present significant difficulties for LE thermal control, requiring extensive coordination to meet the requirements.
6. Low-temperature heat pipes: the main heat conduction in the current scheme depends on the heat pipe, but the current low-temperature heat pipe (lower than-60 ℃) has no previous experience and no reliable mature product, and the problems of heat conduction capability and reliability of the low-temperature heat pipe need to be solved through a switch.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to provide a thermal control structure of an ultralow-temperature low-energy detector, so that the defects of the prior art are overcome.
The invention provides a thermal control structure of an ultralow-temperature low-energy detector, which comprises the following components:
a low-energy detector lower case;
the low-energy detector upper case comprises a mounting plate and a light shield fixedly connected to the mounting plate, wherein a slot for accommodating the collimator and the detector is formed in the mounting plate, and the slot is separated by a plurality of separating edges;
the detector is fixedly arranged in the open slot of the mounting plate;
the collimator is arranged in the slot and is superposed on the detector;
the mounting plate is fixed on the simulation upper plate, and the simulation upper plate separates the lower case of the low-energy detector from the upper case of the low-energy detector;
the U-shaped bottom of the U-shaped heat pipe is uniformly laid on the separation edges, and two ends of the U-shaped heat pipe extending upwards extend along the inner wall of the light shield; and
one end of the L-shaped heat pipe is uniformly laid on the separation edge, and the end of the L-shaped heat pipe extending upwards extends along the inner wall of the light shield.
Preferably, in the above technical solution, an inner surface of the light shield is subjected to black anodizing, and an outer surface of the light shield is provided with the secondary surface mirror coating.
Preferably, in the above technical solution, wherein the light shield further includes: the grid reinforcing ribs are fixed on the side wall of the light shield; the thermistor is attached to the inner surface of the light shield; and an all-day detection window hole which is arranged at one side of the light shield.
Preferably, in the above technical solution, a plurality of collimators are provided, and the collimator is a long collimator or a short collimator, wherein one of the plurality of collimators is a short collimator.
Preferably, in the above technical solution, the long collimator includes the following structure: a long collimator working part, wherein the upper surface and the lower surface of the long collimator working part are parallel to each other; the tantalum sheet surrounds the peripheral side face of the long collimator working part; the shading film is arranged on the top surface of the working part of the long collimator; and a light shielding film pressing frame which is pressed on the light shielding film.
Preferably, in the above technical solution, the short collimator includes the following structure: the short collimator working part is provided with a conical reinforcing rib; the shading film is arranged on the top surface of the working part of the short collimator; and a light shielding film pressing frame which is pressed on the light shielding film.
Preferably, in the above technical solution, the mounting plate and the light shield are fixedly connected by a plurality of screws, and a polyimide heat insulating pad is disposed between the contact surfaces of the screws and the mounting plate.
Preferably, in the above technical solution, the thermal control structure of the ultra-low temperature low energy detector includes: the dog, the dog is L shape, and screw and simulation upper plate fixed connection are passed through to the one end of dog, and the other end of dog passes through the side fixed connection of screw and mounting panel.
Preferably, in the above technical solution, the outer surface of the lower case of the low energy detector is coated with white paint.
Compared with the prior art, the thermal control structure of the ultralow temperature low-energy detector has the following beneficial effects: aiming at the thermal control design difficulties of large span, integral structure installation, severe external heat flow and complex change of each effective load temperature index of the HXMT satellite, the general design idea of effective load thermal control of the invention is formulated by combining the structural layout characteristics of LE and according to the analysis and calculation results: for LE installed on the upper plate of the load main structure, the LE is directly exposed to the outside of the satellite, on the basis of heat insulation measures with the HE, a light shield and an electronic case shell of the LE are used as heat radiating surfaces to radiate for cooling, and meanwhile, the heat radiating surfaces are added on the main structure where the LE is in contact to reduce the reference temperature of an LE installation area, so that the low-temperature requirement of the LE is met.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic diagram of the overall structure of a low energy detector according to an embodiment of the invention;
FIG. 2 is a schematic view of the internal structure of a heat pipe and mounting plate according to one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a light shield according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a long collimator according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a short collimator working portion according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
As shown in fig. 1 to 5, the thermal control structure of the ultra-low temperature low energy detector of the preferred embodiment of the present invention comprises: a low energy detector lower case 101; the low-energy detector upper case comprises a mounting plate 102 and a light shield 103 fixedly connected to the mounting plate, wherein a slot for accommodating the collimator and the detector is formed in the mounting plate, and the slot is separated by a plurality of separating edges 201; the detector 202 is fixedly arranged in the groove of the mounting plate; the collimator is arranged in the slot and is superposed on the detector; a simulated upper plate 104 on which the mounting plate is fixed and which separates the lower case of the low energy detector from the upper case of the low energy detector; the U-shaped bottom of the U-shaped heat pipe 105 is uniformly laid on the separation edges, and two ends of the U-shaped heat pipe extending upwards extend along the inner wall of the light shield; and the L-shaped heat pipes 106, wherein one ends of the L-shaped heat pipes are uniformly laid on the separating edges, and the upwards extending ends of the L-shaped heat pipes extend along the inner wall of the light shield.
Preferably, in the above technical solution, an inner surface of the light shield is subjected to black anodizing, and an outer surface of the light shield is provided with a secondary surface mirror.
Preferably, in the above technical solution, wherein the light shield further includes: the grid reinforcing ribs 301 are fixed on the side wall of the light shield; the thermistor is attached to the inner surface of the light shield; an all-day inspection window hole 302 is formed at one side of the light shield.
Preferably, in the above technical solution, a plurality of collimators are provided, and the collimator is a long collimator or a short collimator, wherein one of the plurality of collimators is a short collimator.
Preferably, in the above technical solution, the long collimator includes the following structure: a long collimator working part 401, wherein an upper surface and a lower surface of the long collimator working part are parallel to each other; tantalum sheet 402 surrounding the outer peripheral side of the long collimator working portion; a light shielding film 403 disposed on the top surface of the long collimator working portion; the light shielding film pressing frame 404 is pressed on the light shielding film, and a protective cover 405 is further disposed on the light shielding film pressing frame 404.
Preferably, in the above technical solution, the short collimator includes the following structure: a short collimator working part, wherein the short collimator working part is provided with a conical reinforcing rib 501; the shading film is arranged on the top surface of the working part of the short collimator; the short collimator has a structure similar to that of the long collimator except that the upper surface of the short collimator is inclined from the horizontal plane after mounting due to the tapered ribs 501.
Preferably, in the above technical solution, the mounting plate and the light shield are fixedly connected by a plurality of screws, and a polyimide heat insulating pad 107 is disposed between the contact surfaces of the screws and the mounting plate.
Preferably, in the above technical solution, the thermal control structure of the ultra-low temperature low energy detector includes: the dog 108, the dog is L shape, and the one end of dog passes through screw and simulation upper plate fixed connection, and the other end of dog passes through the side fixed connection of screw and mounting panel.
Preferably, in the above technical solution, the outer surface of the lower case of the low energy detector is coated with white paint.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (9)
1. The utility model provides a thermal-control structure of ultra-low temperature low energy detector which characterized in that: the thermal control structure of the ultralow temperature low-energy detector comprises:
a low-energy detector lower case;
the low-energy detector upper case comprises a mounting plate and a light shield fixedly connected to the mounting plate, wherein a slot for accommodating the collimator and the detector is formed in the mounting plate, and the slot is separated by a plurality of separation edges;
the detector is fixedly arranged in the groove of the mounting plate;
a collimator mounted within the slot and stacked above the detector;
the mounting plate is fixed on the upper simulation plate, and the upper simulation plate separates the lower low-energy detector case from the upper low-energy detector case;
the U-shaped bottom of the U-shaped heat pipe is laid on the separation edges, and two ends of the U-shaped heat pipe extending upwards extend along the inner wall of the light shield; and
and one end of the L-shaped heat pipe is laid on the separation edge, and the end, extending upwards, of the L-shaped heat pipe extends along the inner wall of the light shield.
2. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 1, wherein: the inner surface of the light shield is subjected to black anodic oxidation treatment, and the outer surface of the light shield is provided with a secondary surface mirror coating.
3. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 2, wherein: wherein, the light shield still includes:
the grid reinforcing ribs are fixed on the side wall of the light shield;
the thermistor is attached to the inner surface of the light shield; and the all-day detection window hole is formed in one side of the light shield.
4. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 3, wherein: the collimator is provided in plurality, and the collimator is a long collimator or a short collimator.
5. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 4, wherein: wherein, long collimater includes the following structure:
a long collimator working part, wherein an upper surface and a lower surface of the long collimator working part are parallel to each other;
the tantalum sheet surrounds the peripheral side face of the long collimator working part;
the light shielding film is arranged on the top surface of the long collimator working part; and a light shielding film pressing frame which is pressed on the light shielding film.
6. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 4, wherein: wherein, the short collimator comprises the following structure:
a short collimator working part, wherein the short collimator working part is provided with a conical reinforcing rib;
the light shielding film is arranged on the top surface of the working part of the short collimator; and a light shielding film pressing frame which is pressed on the light shielding film.
7. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 4, wherein: the mounting plate is fixedly connected with the light shield through a plurality of screws, and polyimide heat insulation pads are arranged between the screws and the contact surfaces of the mounting plate.
8. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 7, wherein: the thermal control structure of the ultralow temperature low-energy detector comprises: the stop block is L-shaped, one end of the stop block is fixedly connected with the simulation upper plate through a screw, and the other end of the stop block is fixedly connected with the side edge of the mounting plate through a screw.
9. The thermal control structure of an ultra-low temperature low energy detector as claimed in claim 8, wherein: and white paint is coated on the outer surface of the lower case of the low-energy detector.
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| CN109828621B true CN109828621B (en) | 2020-03-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5842348A (en) * | 1994-10-28 | 1998-12-01 | Kabushiki Kaisha Toshiba | Self-contained cooling apparatus for achieving cyrogenic temperatures |
| KR20110024357A (en) * | 2009-09-02 | 2011-03-09 | 국방과학연구소 | Black body assembly for calibration of infrared detector |
| CN104329852A (en) * | 2014-08-29 | 2015-02-04 | 青岛海尔股份有限公司 | Semiconductor refrigeration refrigerator and manufacturing method thereof |
| CN208266222U (en) * | 2018-07-02 | 2018-12-21 | 深圳市德捷力冷冻科技有限公司 | The compound deep cold treatment apparatus of metal high/low temperature |
| CN109141628A (en) * | 2018-06-14 | 2019-01-04 | 上海卫星工程研究所 | A kind of spaceborne optical fiber focus planar detector device |
-
2019
- 2019-02-26 CN CN201910141771.5A patent/CN109828621B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5842348A (en) * | 1994-10-28 | 1998-12-01 | Kabushiki Kaisha Toshiba | Self-contained cooling apparatus for achieving cyrogenic temperatures |
| KR20110024357A (en) * | 2009-09-02 | 2011-03-09 | 국방과학연구소 | Black body assembly for calibration of infrared detector |
| CN104329852A (en) * | 2014-08-29 | 2015-02-04 | 青岛海尔股份有限公司 | Semiconductor refrigeration refrigerator and manufacturing method thereof |
| CN109141628A (en) * | 2018-06-14 | 2019-01-04 | 上海卫星工程研究所 | A kind of spaceborne optical fiber focus planar detector device |
| CN208266222U (en) * | 2018-07-02 | 2018-12-21 | 深圳市德捷力冷冻科技有限公司 | The compound deep cold treatment apparatus of metal high/low temperature |
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