Thermal control device of Doppler differential interferometer with high thermal stability
阅读说明:本技术 一种高热稳定性多普勒差分干涉仪热控装置 (Thermal control device of Doppler differential interferometer with high thermal stability ) 是由 畅晨光 孙剑 李勇 冯玉涛 郝雄波 张兆会 李娟� 于 2019-08-30 设计创作,主要内容包括:本发明涉及一种高热稳定性多普勒差分干涉仪热控装置,解决现有多普勒差分干涉仪测量精度较低的问题。该装置包括真空箱体、箱体盖板、热控壳和热控板;箱体盖板与真空箱体组成真空腔体;真空箱体上设置有用于进光和出光的窗口玻璃、用于抽真空的箱体真空接口、与加热片连接的箱体加热片接口、与热敏电阻连接的箱体热敏电阻接口;窗口玻璃通过窗口压圈轴向压紧在真空箱体上,且与窗口压圈之间设置有窗口隔热垫;真空箱体和窗口玻璃之间设置有窗口玻璃橡胶垫;热控壳和热控板设置在真空腔体内,且多普勒差分干涉仪组件设置在热控壳和热控板组成的安装腔体内;热控板上设置有多个加热片和热敏电阻,对热控板进行加热和温度反馈。(The invention relates to a thermal control device of a Doppler differential interferometer with high thermal stability, which solves the problem of low measurement precision of the conventional Doppler differential interferometer. The device comprises a vacuum box body, a box body cover plate, a thermal control shell and a thermal control plate; the cover plate of the box body and the vacuum box body form a vacuum cavity; the vacuum box body is provided with window glass for light inlet and light outlet, a box body vacuum interface for vacuumizing, a box body heating sheet interface connected with a heating sheet, and a box body thermistor interface connected with a thermistor; the window glass is axially pressed on the vacuum box body through the window pressing ring, and a window heat insulation pad is arranged between the window glass and the window pressing ring; a window glass rubber pad is arranged between the vacuum box body and the window glass; the thermal control shell and the thermal control plate are arranged in the vacuum cavity, and the Doppler differential interferometer assembly is arranged in an installation cavity formed by the thermal control shell and the thermal control plate; the thermal control plate is provided with a plurality of heating sheets and thermistors for heating and temperature feedback.)
1. The utility model provides a high thermal stability doppler difference interferometer thermal control device which characterized in that: comprises a vacuum box body (1), a box body cover plate (3), a thermal control shell (15) and a thermal control plate (14);
the box body cover plate (3) is arranged above the vacuum box body (1) and forms a vacuum cavity with the vacuum box body (1); the vacuum box body (1) is provided with window glass (5) for light inlet and light outlet, a box body vacuum interface (20) for vacuumizing, a box body heating sheet interface (21) connected with a heating sheet, and a box body thermistor interface (22) connected with a thermistor;
the window glass (5) is axially pressed on the vacuum box body (1) through a window pressing ring (10), and a window glass rubber pad (7) is arranged between the window glass and the window pressing ring (10); a window heat insulation pad (9) is arranged between the vacuum box body (1) and the window pressing ring (10);
the thermal control shell (15) and the thermal control board (14) are arranged in the vacuum cavity, and the Doppler differential interferometer component (16) is arranged in an installation cavity formed by the thermal control shell (15) and the thermal control board (14); an interferometer heat insulation pad (18) is arranged between the Doppler difference interferometer assembly (16) and the thermal control plate (14), and a heating plate heat insulation pad (19) is arranged between the thermal control plate (14) and the vacuum box body (1);
the thermal control plate (14) is provided with a plurality of heating sheets and thermistors for heating and temperature feedback of the thermal control plate (14).
2. The thermal control apparatus of high thermal stability doppler differential interferometer according to claim 1, wherein: the bottom of vacuum box (1) is provided with box trim board (11), the bottom of box trim board (11) is provided with a plurality of trimming bosss.
3. The thermal control apparatus of high thermal stability doppler differential interferometer according to claim 2, wherein: a box body heat insulation pad (12) is arranged between the box body trimming plate (11) and the vacuum box body (1).
4. The thermal control apparatus of claim 3, wherein: the vacuum box body (1) is connected with the box body trimming plate (11) and the box body heat insulation pad (12) through screws, and a box body heat insulation T-shaped sleeve (13) is arranged between the screws and the mounting hole of the vacuum box body (1).
5. The thermal control device of the Doppler differential interferometer with high thermal stability according to any one of claims 1 to 4, wherein: the inner surfaces of the vacuum box body (1) and the box body cover plate (3) are polished surfaces, and gold-plated layers are arranged on the inner surface and the outer surface of the thermal control shell (15).
6. The thermal control device of high thermal stability doppler differential interferometer according to claim 5, wherein: the Doppler differential interferometer assembly (16), the thermal control plate (14) and the vacuum box body (1) are connected through screws, and an interferometer heat insulation T-shaped sleeve (17) is arranged between the screws and mounting holes of the Doppler differential interferometer assembly (16).
7. The thermal control apparatus of claim 6, wherein: the vacuum box is characterized in that a window axial sealing ring (4) and a window radial sealing ring (6) are arranged on the contact surface of the vacuum box body (1) and the window glass (5), and the window radial sealing ring (6) is pressed in through a radial sealing pressing ring (8).
8. The thermal control apparatus of claim 7, wherein: and a box cover plate sealing ring (2) is arranged between the vacuum box body (1) and the box cover plate (3).
9. The thermal control apparatus of claim 8, wherein: and heat-conducting silicone grease is arranged on the contact surface of the thermal control shell (15) and the thermal control plate (14), and heat-insulating materials are wrapped on the outer surfaces of the vacuum box body (1) and the box body cover plate (3).
10. The thermal control apparatus of high thermal stability doppler differential interferometer according to claim 9, wherein: the minimum wall thickness t of the vacuum box body (1)0=0.224B/σBendWherein B is the length of the shortest side of the box body, sigmaBendIs the flexural strength of the material.
Technical Field
The invention relates to a thermal control device, in particular to a thermal control device of a Doppler differential interferometer with high thermal stability.
Background
The wind field and the temperature field are important foundations for recognizing the physical phenomenon process of the middle and upper atmosphere, researching the momentum, energy and component transport between the upper and lower atmosphere, revealing the basic rule and change of the upper and lower atmosphere and establishing a forecasting and predicting model. The Doppler differential interferometer system is an important device for detecting a middle-high atmospheric wind field, and is used for reflecting information such as the high atmospheric wind field, temperature and the like by using a passive optical remote sensing method for measuring airglow characteristic radiation according to Doppler frequency shift and broadening of airglow spectral lines, so that the Doppler differential interferometer system is required to have extremely high spectral resolution capability.
As a novel wind measuring device, a Doppler differential interferometer is a core component of the wind measuring device, and a differential interferometer is very sensitive to temperature change, ambient temperature fluctuation can cause temperature fluctuation and thermal stress of an interferometer component, so that the difference of the basic optical paths of two arms of the interferometer is easy to change, the phase of an interferogram is caused to drift, and further the phase inversion precision is reduced, and therefore high-thermal-stability thermal control needs to be carried out on the Doppler differential interferometer.
Disclosure of Invention
The invention aims to solve the problem of low measurement precision of the conventional Doppler differential interferometer and provides a thermal control device of the Doppler differential interferometer with high thermal stability.
The device disclosed by the invention has the advantages that through designing an interferometer vacuum box body structure, a thermal control structure, a heat insulation measure and the like, an interferometer assembly works in an environment with low heat conduction, low heat convection and low heat radiation, and the temperature control system is controlled by temperature, so that the interferometer assembly is passively controlled by temperature, the temperature stability of the interferometer assembly is superior to the control precision of the temperature control system, the interferometer assembly is ensured to stably work in the thermal control system, and the measurement precision of the Doppler difference interferometer is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a thermal control device of a Doppler difference interferometer with high thermal stability comprises a vacuum box body, a box body cover plate, a thermal control shell and a thermal control plate; the box body cover plate is arranged above the vacuum box body and forms a vacuum cavity with the vacuum box body; the vacuum box body is provided with window glass for light inlet and light outlet, a box body vacuum interface for vacuumizing, a box body heating sheet interface connected with a heating sheet, and a box body thermistor interface connected with a thermistor; the window glass is axially pressed on the vacuum box body through the window pressing ring, and a window glass rubber pad is arranged between the window glass and the window pressing ring; a window heat insulation pad is arranged between the vacuum box body and the window pressing ring; the thermal control shell and the thermal control plate are arranged in the vacuum cavity, and the Doppler differential interferometer assembly is arranged in an installation cavity formed by the thermal control shell and the thermal control plate; an interferometer heat insulation pad is arranged between the Doppler differential interferometer assembly and the thermal control plate, and a heating plate heat insulation pad is arranged between the thermal control plate and the vacuum box body; the thermal control plate is provided with a plurality of heating sheets and thermistors, the thermal control plate is heated and temperature feedback is carried out, and the temperature of the thermal control plate is uniformly and stably controlled by controlling the output power of the heating sheets.
Further, the bottom of vacuum box is provided with the box and repaiies the cutting plate, the bottom of box is repaiied the cutting plate and is provided with a plurality of trimming bosss.
Furthermore, a box body heat insulation pad is arranged between the box body trimming plate and the vacuum box body.
Furthermore, the vacuum box body is connected with the box body trimming plate and the box body heat insulation pad through screws, and a box body heat insulation T-shaped sleeve is arranged between the screws and the mounting hole of the vacuum box body.
Further, the inner surfaces of the vacuum box body and the box body cover plate are polished surfaces, and gold-plated layers are arranged on the inner surface and the outer surface of the thermal control shell.
Furthermore, the Doppler difference interferometer assembly, the thermal control plate and the vacuum box body are connected through screws, and an interferometer heat insulation T-shaped sleeve is arranged between the screws and the installation holes of the Doppler difference interferometer assembly.
Further, a window axial sealing ring and a window radial sealing ring are arranged on the contact surface of the vacuum box body and the window glass, and the window radial sealing ring is pressed in through a radial sealing pressing ring.
Further, a box cover plate sealing ring is arranged between the vacuum box body and the box cover plate.
Furthermore, heat-conducting silicone grease is arranged on the contact surface of the thermal control shell and the thermal control plate, and heat insulating materials are wrapped on the outer surfaces of the vacuum box body and the box body cover plate.
Further, the minimum wall thickness t of the vacuum box body0=0.224B/σBendWherein B is the length of the shortest side of the box body, sigmaBendIs the flexural strength of the material.
Compared with the prior art, the invention has the following beneficial effects:
1. the device can be used for improving the temperature stability of the Doppler difference interferometer, reducing the optical path difference change and the surface shape change of the Doppler difference, causing the quality of interference images and further improving the phase inversion precision.
2. The device provides a good thermal control environment for the Doppler differential interferometer, has small thermal convection, small thermal radiation and small heat conduction, reduces the influence of external temperature fluctuation on the Doppler differential interferometer as much as possible, and improves the temperature stability of the Doppler differential interferometer.
3. The box cover plate, the optical window, the electrical interface and the vacuum interface of the device have good sealing performance, and the vacuum box assembly has good vacuum retention performance, so that the thermal convection can be reduced, and the influence of gas on the optical performance of the Doppler differential interferometer can be reduced.
4. The device has simple installation structure, is convenient to disassemble and adjust, is easy to implement thermal control, and can ensure that the Doppler difference interferometer has high installation precision in a system light path.
Drawings
FIG. 1 is a cross-sectional view of a thermal control device of a high thermal stability Doppler differential interferometer of the present invention;
FIG. 2 is a schematic diagram of a conventional Doppler differential interferometer assembly;
FIG. 3 is a schematic view of the installation of the Doppler differential interferometer assembly of the present invention;
FIG. 4 is a first structural diagram of a thermal control device of the Doppler difference interferometer with high thermal stability according to the present invention;
FIG. 5 is a structural diagram of a thermal control device of the Doppler difference interferometer with high thermal stability according to the second embodiment of the present invention.
Reference numerals: 1-vacuum box, 2-box cover plate seal ring, 3-box cover plate, 4-window axial seal ring, 5-window glass, 6-window radial seal ring, 7-window glass rubber gasket, 8-radial seal clamping ring, 9-window heat insulation pad, 10-window clamping ring, 11-box trim plate, 12-box heat insulation pad, 13-box heat insulation T-shaped sleeve, 14-heat control plate, 15-heat control shell, 16-Doppler difference interferometer component, 17-interferometer heat insulation T-shaped sleeve, 18-interferometer heat insulation pad, 19-heating plate heat insulation pad, 20-box vacuum interface, 21-box heating plate interface, 22-box thermistor interface.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The device of the invention enables the interferometer component to work in the environment with low heat conduction, low heat convection and low heat radiation by designing the vacuum box body structure, the thermal control structure, the heat insulation measure and the like of the interferometer, and controls the temperature of the thermal control system to control the temperature passively, so that the temperature stability of the interferometer component is superior to the control precision of the temperature control system, the stable work of the interferometer component in the thermal control system is ensured, meanwhile, the interferometer component is installed in the thermal control system with high precision, the performance of an optical system is not influenced by the structure of the thermal control system, and the thermal control implementation is easy.
As shown in fig. 1 to 5, the thermal control device of the doppler difference interferometer with high thermal stability provided by the present invention includes a
The
The
The sizes of the
The diameter of the
The inner surfaces of the
The Doppler
The
In order to ensure the installation accuracy of the doppler
The installation accuracy of the Doppler difference interferometer in the system light path is ensured by the installation accuracy of the
Thermal control of the doppler
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