Direct-drive bistable cut-in or cut-out type unbalance loading calibration device

Abstract

The invention relates to a calibration mechanism, in particular to a direct-drive bistable cut-in or cut-out unbalance loading calibration device, and solves the technical problems of no on-orbit emergency measures, low reliability, large size and weight, complex transmission, small temperature difference range and the like of the existing calibration mechanism. The direct-drive bistable cut-in or cut-out type unbalance loading calibration device comprises a base, an emergency reset mechanism, a driving motor, a rotating shaft, a load used for shielding a light path during on-orbit calibration, a radiation cooling cover mechanism, a pin puller and a position sensor. The emergency reset mechanism is located at the upper end of the base. The driving motor is positioned below the base; the upper end of the rotating shaft is matched with the emergency reset mechanism; one side edge of the load is fixedly connected with the middle of the rotating shaft and can rotate along with the rotating shaft; the radiation cooling cover mechanism is fixedly connected with the base; and the pin puller is arranged on the emergency reset mechanism.

Description

Technical Field

[0001] The invention relates to a calibration mechanism, in particular to a direct-drive bistable cut-in or cut-out type eccentric load calibration device. Background Art

[0002] After the medium and long wave remote sensing payload is launched into orbit, its performance will change due to factors such as the space environment, its own aging, and the non-uniform dark current fluctuation of the detector response, which will seriously affect the image quality. Relative and absolute radiation calibration is required through the black body and gray body on the satellite surface source. The conventional calibration scheme is to directly or indirectly introduce the radiation of the black body and gray body into the main optical path system through rotation, translation and other schemes.

[0003] The mechanism that performs this function, whether it is translation or rotation, is generally implemented through the "stepping motor + transmission device" solution, and the load is generally statically balanced. This solution has a high complexity and reduced on-track reliability due to the addition of transmission links such as gears, racks, worm wheels, worms, cams, crank sliders, etc. Moreover, the calibration temperature points in these solutions generally only have high temperatures, that is, temperatures that are 20°C (293K) greater than normal temperature, and there are no low-temperature temperature points. The temperature difference is small, and the mechanism has no emergency measures. Once a failure occurs after cutting into the optical path, the optical path cannot be cut out, causing the camera in the mechanism to fail. Chinese patent CN110864707B proposes "a high-reliability and high-self-locking capability calibration mechanism", in which a crank rocker mechanism is added, thereby reducing reliability, and the introduced torsion spring increases the resistance torque of the mechanism, and there is a risk of failure due to the long-term periodic action of the torsion spring. Chinese patent CN110806267A proposed "a cut-in type satellite-borne large field of view infrared camera calibration mechanism", which added a harmonic reducer, and the drive shaft and cylindrical compression spring were not decoupled, and had the same drawbacks as patent CN110864707B, with a temperature point of 100°C (373K) and a single temperature. Chinese patent CN116625525A proposed "a self-locking crank, cam blackbody on-orbit calibration mechanism", which, in addition to introducing a crank slider mechanism, also added a sliding guide rail, cam and limit spring, which was very compact but highly complex, and had the risk of failure of the entire mechanism due to a single point failure. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problems of existing calibration mechanisms, such as no on-track emergency measures, low reliability, large size and weight, complex transmission, and small temperature difference range, and to provide a direct-drive bistable cut-in or cut-out type eccentric load calibration device.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A direct-drive bistable cut-in or cut-out type offset load calibration device, which is special in that it includes a base, an emergency reset mechanism, a drive motor, a rotating shaft, a load for blocking the light path during on-track calibration, a radiation cooling cover mechanism, a pin puller and a position sensor;

[0007] The emergency reset mechanism is located at the upper end of the base;

[0008] The driving motor is located at the lower end of the base;

[0009] The upper end of the rotating shaft cooperates with the emergency reset mechanism, and the lower end thereof is connected to the driving motor;

[0010] One side of the load is fixedly connected to the middle of the shaft and can rotate with the shaft;

[0011] The radiation cooling cover mechanism is fixedly connected to the base, and is used to receive the load after the optical path is cut out, and to provide radiation cooling to the load in the cut-out state;

[0012] The pin puller is arranged on the emergency reset mechanism and is used to open the emergency reset mechanism in case of control circuit failure;

[0013] The position sensor includes a Hall element and two magnetic steel elements. The Hall element is fixedly connected to the rotating shaft and rotates around the rotating shaft. The two magnetic steel elements are located on the rotation path of the Hall element when the load cuts out of the optical path or cuts into the optical path.

[0014] Alternatively, the position sensor includes two Hall elements and a magnetic steel element, the magnetic steel element is fixedly connected to the rotating shaft and rotates with the rotating shaft, and the two Hall elements are located on the rotation path of the magnetic steel element when the load cuts out of the optical path or cuts into the optical path.

[0015] Furthermore, it also includes a flexible connection mechanism; the flexible connection mechanism includes a first connection terminal, a second connection terminal and a third connection terminal which are sequentially connected from bottom to top along the axial direction;

[0016] The first connecting terminal is provided with a semicircular hole adapted to the output shaft of the driving motor;

[0017] A rotating shaft pin hole is provided on the circumferential side wall of the third connecting terminal; the third connecting terminal is connected to the lower end of the rotating shaft through the rotating shaft pin and the rotating shaft pin hole;

[0018] Spring sheets are respectively arranged between the first connecting terminal and the second connecting terminal and between the second connecting terminal and the third connecting terminal, and boss holes for installing the spring sheets are respectively arranged on the end surfaces of the first connecting terminal and the third connecting terminal close to the second connecting terminal, and the boss holes are used to ensure that the spring sheets have a certain deformation space after installation.

[0019] Further, the base includes a first raised seat at the upper end of the base, and a second raised seat and a third raised seat at the lower end;

[0020] The emergency reset mechanism is arranged at the upper end of the first raised seat;

[0021] The upper end of the rotating shaft passes through the first protruding seat and is connected to the emergency reset mechanism, and the lower end passes through the second protruding seat and is connected to the third connecting terminal;

[0022] The magnetic steel element and the Hall element are arranged at the lower end of the rotating shaft and between the second protruding seat and the third protruding seat;

[0023] The driving motor is arranged at the lower end of the third protruding seat, and the output end of the driving motor passes through the third protruding seat and is connected with the first connecting terminal.

[0024] Further, the emergency reset mechanism includes a coil spring box, a coil spring shaft coaxially rotatably arranged in the coil spring box, a reset disk connected to the upper end of the coil spring shaft, an emergency lever connected to the lower end of the coil spring shaft, a flat coil spring located between the coil spring shaft and the coil spring box, an upper cover plate located between the reset disk and the upper end of the coil spring box, a locking nut for fixing the reset disk, and a bearing and a swing rod;

[0025] The pin puller is arranged on the outer wall of the coil spring box;

[0026] The upper end of the coil spring shaft passes through the upper cover plate, the reset plate and is connected with the locking nut in sequence;

[0027] The reset disk is evenly distributed along the circumference with a plurality of external pin holes that cooperate with the pin puller pins;

[0028] The inner interface of the planar coil spring is connected to the coil spring rotating shaft, and the outer interface is clamped with the coil spring box. The planar coil spring is used to drive the emergency lever to rotate during emergency reset.

[0029] The rotating shaft is connected to the first protruding seat via a bearing, and the upper end of the rotating shaft passes through the first protruding seat and is fixedly connected to the swing rod;

[0030] The emergency lever cooperates with the swing lever to push the swing lever and then drive the rotating shaft to rotate so that the load cuts out of the light path during emergency reset.

[0031] Furthermore, it also includes a position-limiting fixing mechanism disposed at the lower end of the first protruding seat and a position-limiting rotating mechanism disposed on the rotating shaft close to the lower end of the first protruding seat;

[0032] The limiting fixing mechanism includes an arc-shaped body, a cutting-out limiting surface and a cutting-in limiting surface respectively arranged at two ends of the lower end surface of the arc-shaped body, and a first stable trap and a second stable trap arranged between the cutting-out limiting surface and the cutting-in limiting surface;

[0033] The limit rotation mechanism includes a limit rotation rod, a limit ball, a limit spring and a locking screw;

[0034] One end of the limit rotation rod is fixedly connected to the rotating shaft, and the other end is used to swing between the cut-out limit surface and the cut-in limit surface when the rotating shaft rotates;

[0035] The other end of the limit rotation rod is provided with an axial mounting hole, and the limit ball, the limit spring, and the locking screw are sequentially arranged in the mounting hole from top to bottom; the limit ball cooperates with the first stable trap to limit the load when it cuts out of the optical path; or, the limit ball cooperates with the second stable trap to limit the load when it cuts into the optical path;

[0036] The locking screw adjusts the preload force of the limit ball by adjusting the compression amount of the limit spring.

[0037] Furthermore, it also includes a locking pin puller, a locking pin hole member and a bracket;

[0038] The locking pin puller is arranged on the base, on which the locking pin puller pin is arranged, and the locking pin puller is used to be electrically connected to the external device;

[0039] The load is fixedly connected to the side wall of the rotating shaft through the bracket;

[0040] The locking pin hole is arranged on the bracket and corresponds to the position of the locking pin puller. The end of the locking pin hole is provided with a tapered hole, which cooperates with the pin of the locking pin puller and is used to lock the rotating shaft when the load cuts out the optical path.

[0041] Furthermore, the magnetic steel element includes a magnetic steel seat, a magnetic steel protective shell and a magnetic steel arranged inside the magnetic steel protective shell;

[0042] The Hall element includes a Hall cover plate, a Hall seat, a Hall bracket and a Hall chip circuit;

[0043] One end of the two magnetic steel seats is fixedly connected to the base; one end of the Hall bracket is fixedly connected to the rotating shaft; or one end of the magnetic steel seat is fixedly connected to the rotating shaft; one end of the two Hall brackets is respectively fixedly connected to the base;

[0044] The magnetic steel protective shell is arranged at the other end of the magnetic steel seat, and a magnetic steel magnetic limiting hole is arranged on the magnetic steel protective shell;

[0045] The Hall cover plate and the Hall seat are arranged at the other end of the Hall bracket, and the Hall chip circuit is arranged between the Hall cover plate and the Hall seat to form a magnetic induction current signal with the magnetic steel;

[0046] The Hall cover plate is provided with a wire outlet slot and a Hall sensing hole respectively; the wire outlet slot is used to lead out the connection wire of the Hall chip in the Hall chip circuit and electrically connect it to the external device; the Hall sensing hole is used to correspond to the magnetic steel limiting hole and mark the theoretical sensing position of the Hall chip.

[0047] Furthermore, the load includes a radiation plate, a titanium screw, a back plate, a thermal insulation T-type sleeve and a thermal insulation pad;

[0048] The radiation plate is arranged on the side wall of the bracket close to the radiation cooling cover mechanism when the load cuts out the light path through titanium screws, and the back plate is arranged on the other side wall of the bracket. Thermal control layers are arranged between the back plate and the bracket, and between the radiation plate and the bracket.

[0049] A heat-insulating T-shaped sleeve is provided between the radiation plate and the titanium screw;

[0050] A heat insulation pad is arranged between the radiation plate and the bracket.

[0051] Furthermore, the radiation cooling cover mechanism includes a radiation cooling cover shell, a collision fixing block, a collision nut, a collision rubber, a heat pipe, a heat pipe clamp, a flexible pad and a screw anti-slip baffle;

[0052] The shell of the radiant cooling hood is fixed on the base, and the size of the radiant cooling hood shell is matched with the size of the back plate;

[0053] The collision fixing block is arranged on the inner wall of the radiation cooling cover shell close to the radiation plate when the load cuts out the light path through the collision nut;

[0054] The collision rubber is arranged on the collision fixing block and corresponds to the position of the titanium screw, and is used for directly contacting with the titanium screw to reduce the emergency impact force when the load cuts out of the optical path;

[0055] The heat pipe is arranged on the outer wall of the radiation cooling cover shell through a heat pipe clamp, and the heat pipe is used to connect with the on-board cold plate to ensure a low temperature environment;

[0056] The heat pipe clamp is connected to the radiation cooling cover shell by screws, and the flexible pad is arranged at the connection between the heat pipe clamp and the radiation cooling cover shell;

[0057] The screw anti-dropping baffle is bonded to the outer wall of the heat pipe clamp and is located outside the screw.

[0058] Furthermore, the invention also includes a heat-insulating trimming pad and a locking pin puller trimming pad;

[0059] The pin puller is arranged on the outer wall of the coil spring box through a heat-insulating trimming pad;

[0060] The locking pin puller is arranged on the base through the locking pin puller trimming pad;

[0061] The position limiting and fixing mechanism also includes a plurality of glue injection grooves arranged between the first stable trap and the second stable trap, for assisting in fixing the arc-shaped body;

[0062] The driving motor is a stepper motor with winding backup;

[0063] The radiation panel adopts a black body, and the inner side of the black body is coated with black paint, and a heating sheet is attached to the outer side.

[0064] Beneficial effects of the present invention:

[0065] (1) The direct-drive bistable cut-in or cut-out type eccentric load calibration device of the present invention reduces the transmission complexity due to the driving mode of the rotating shaft coordinated with the emergency reset mechanism and the driving motor. In addition, in the cut-out state and the cut-in state, the load position will not be uncontrolled and deviate from the original state due to the impact of micro-vibration on the orbit and the action of moving parts on the satellite.

[0066] (2) The direct-drive bistable cut-in or cut-out eccentric load calibration device of the present invention can simultaneously meet the on-orbit emergency response, position bistable, reduced volume and weight, and adaptability to large temperature difference on-orbit calibration requirements.

[0067] (3) The present invention is a direct-drive bistable cut-in or cut-out type off-load calibration device, in which the load and the bracket are both located on one side of the rotating shaft, and the other side is not balanced by additional weight to ensure that the center of gravity of the load is on the central axis of the rotating shaft. Therefore, the load is an off-load structure and is not balanced. Since balancing requires additional structural design, in addition to increasing the volume, the balancing weight is also increased. However, the load of the present invention is not balanced and does not require balancing weight. The locking pin puller is used to lock the load to resist the mechanical environment of the satellite launch active segment, which can reduce the volume and weight of the optical payload system and facilitate the compact design of the optical payload system.

[0068] (4) The present invention is a direct-drive bistable cut-in or cut-out type eccentric load calibration device, in which the load can be applied to a large temperature difference environment of 360K to 210K through thermal insulation measures (i.e., titanium screws, thermal insulation T-sleeves, thermal insulation pads, locking pin puller trimming pads, thermal insulation trimming pads, and thermal control multilayers).

[0069] (5) The present invention is a direct-drive bistable cut-in or cut-out type eccentric load calibration device, which is directly driven by a stepper motor with winding backup and Hall induction positioning. It has no transmission link, which reduces the complexity of the device and increases the on-track reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 is a schematic diagram of the structure of the base and the radiation cooling cover mechanism in an embodiment of the present invention (the load is not shown);

[0071] Figure 2 is a schematic diagram of the structure of a load cutting into an optical path in an embodiment of the present invention;

[0072] Figure 3 A schematic diagram of the structure of the load cutting out optical path in an embodiment of the present invention;

[0073] Figure 4 is a partial cross-sectional view of a load in an embodiment of the present invention;

[0074] Figure 5 is a partial cross-sectional view of the inner side wall of the radiant cooling cover mechanism in an embodiment of the present invention;

[0075] Figure 6is a partial cross-sectional view of the outer side wall of the radiant cooling cover mechanism in an embodiment of the present invention;

[0076] Figure 7 is a schematic structural diagram of an emergency reset mechanism in an embodiment of the present invention;

[0077] Figure 8 It is a schematic diagram of the installation structure of the planar coil spring, the coil spring rotating shaft, the emergency lever, the swing lever and the rotating shaft in the emergency reset mechanism of the embodiment of the present invention;

[0078] Fig. 9 is a structural schematic diagram of a flexible connection mechanism in an embodiment of the present invention;

[0079] Fig.10 is a schematic structural diagram of a third connecting terminal in an embodiment of the present invention;

[0080] Fig.11 is a schematic diagram of a locked state of a locking pin puller when a load is cut out of an optical path in an embodiment of the present invention;

[0081] Fig.12 yes Figure 1 Schematic diagram of the structure in the P direction;

[0082] Fig.13 is a schematic structural diagram of a position limiting and fixing mechanism in an embodiment of the present invention;

[0083] Fig.14 is a schematic structural diagram of a position limiting rotation mechanism in an embodiment of the present invention;

[0084] Fig.15 is a schematic structural diagram of a magnetic steel element in an embodiment of the present invention;

[0085] Fig.16 is a schematic diagram of the structure of a Hall element in an embodiment of the present invention;

[0086] Fig.17 is a cross-sectional view of a Hall element in an embodiment of the present invention;

[0087] Fig.18 is a schematic diagram of a micro-cone structure on a radiation cooling cover shell in an embodiment of the present invention;

[0088] Fig.19 It is a schematic diagram of the installation structure of two Hall elements and a magnetic steel element in the second embodiment of the present invention.

[0089] Description of reference numerals:

[0090] 1. Base; 11. Emergency reset mechanism; 101. Coil spring box; 102. Coil spring shaft; 103. Reset plate; 104. Emergency lever; 105. Plane coil spring; 106. Upper cover; 107. Locking nut; 108. Bearing; 109. Swinging rod; 12. Driving motor; 13. Pin puller; 132. Heat insulation trimming pad; 14. First protruding seat; 15. Second protruding seat; 16. Third protruding seat; 17. Locking pin puller; 171, locking pin puller pin; 172, locking pin puller trimming pad; 18, locking pin hole piece; 181, tapered hole; 19, bracket; 2, load; 21, radiation plate; 22, titanium screw; 23, back plate; 24, thermal insulation T-type sleeve; 25, thermal insulation pad; 3, radiation cooling cover mechanism; 31, radiation cooling cover shell; 32, collision fixing block; 33, collision nut; 34, collision rubber; 35, heat pipe; 36, heat pipe clamp; 37, flexible pad; 3 8. Screw anti-slip baffle; 4. Rotating shaft; 5. Magnetic steel element; 51. Magnetic steel seat; 52. Magnetic steel protective shell; 53. Magnetic steel magnetic limiting hole; 54. Magnetic steel; 6. Hall element; 61. Hall cover plate; 611. Wire outlet slot; 612. Hall sensing hole; 62. Hall seat; 63. Hall bracket; 64. Hall chip circuit; 7. Flexible connection mechanism; 71. First connecting terminal; 711. Semicircular hole; 72. Second connecting terminal; 73. Three connecting terminals; 731, shaft pin hole; 74, spring sheet; 75, boss hole; 8, limit fixing mechanism; 81, arc-shaped body; 82, cut-out limit surface; 83, cut-in limit surface; 84, first stable trap; 85, second stable trap; 86, glue injection groove; 9, limit rotation mechanism; 91, limit rotation rod; 92, limit ball; 93, limit spring; 94, locking screw; 10, electrical connector assembly; 100, cable clamp. DETAILED DESCRIPTION

[0091] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0092] like Figure 1 , Figure 2 , Figure 3 As shown, a direct-drive bistable cut-in or cut-out type eccentric load calibration device includes a base 1, a load 2, a radiant cooling cover mechanism 3, a rotating shaft 4, two magnetic steel elements 5 with the same structure, a Hall element 6, a flexible connection mechanism 7, a limit fixing mechanism 8, a limit rotation mechanism 9, a pin puller 13, a locking pin puller 17, a locking pin hole 18, a bracket 19, a thermal insulation trimming pad 132 and a locking pin puller trimming pad 172.

[0093] An emergency reset mechanism 11 is provided at the upper end of the base 1, and a drive motor 12 is provided at the lower end of the base 1; the drive motor 12 is directly driven by a stepper motor with winding backup, and drives the load 2 to cut into or out of the optical path and swing through the flexible connection mechanism 7. An electrical connector assembly 10 is provided on one side wall of the base 1; the base 1 is composed of a first protrusion seat 14 located at the upper end of the base 1, and a second protrusion seat 15 and a third protrusion seat 16 at the lower end; the emergency reset mechanism 11 is provided at the upper end of the first protrusion seat 14; the upper end of the rotating shaft 4 passes through the first protrusion seat 14 to connect with the emergency reset mechanism 11, and the lower end passes through the second protrusion seat 15 to connect with the third connection terminal 73; the magnetic steel element 5 and the Hall element 6 are provided at the lower end of the rotating shaft 4 and are located between the second protrusion seat 15 and the third protrusion seat 16; the drive motor 12 is provided at the lower end of the third protrusion seat 16, and its output end passes through the third protrusion seat 16 to connect with the first connection terminal 71.

[0094] The load 2 is fixedly connected to the side wall of the rotating shaft 4, and is used to block the optical path during on-track calibration; the radiant cooling cover mechanism 3 is fixedly connected to the side wall of the other side of the base 1, and the radiant cooling cover mechanism 3 cooperates with the load 2, and is used to store the load 2 when the optical path is cut out, and to radiate cooling to the load 2 when the optical path is cut out; the pin puller 13 is arranged on the emergency reset mechanism 11 through the heat insulation trimming pad 132; the pin puller pin is arranged on the pin puller 13; the pin puller 13 is electrically connected to the external device through the electrical connector assembly 10, and is used to retract the pin puller pin when the control circuit fails; the lower end of the rotating shaft 4 is connected to the output shaft of the drive motor 12 The upper end of the rotating shaft 4 cooperates with the emergency reset mechanism 11, and in the case of failure of the control circuit, the emergency reset mechanism 11 can drive the rotating shaft 4 to cut the load 2 out of the light path to prevent the load 2 from blocking the light path; the magnetic steel element 5 is arranged on the base 1, and is located on the rotation path of the Hall element 6 when the load 2 cuts out of the light path or cuts into the light path; the magnetic steel element 5 is used to cooperate with the Hall element 6; the Hall element 6 is fixedly connected to the lower end of the rotating shaft 4, and is used to be electrically connected to an external device through the electrical connector assembly 10 to represent the position where the load 2 cuts out of the light path or cuts into the light path. Figure 4 As shown, the load 2 is composed of a radiation plate 21, a titanium screw 22, a back plate 23, a thermal insulation T-shaped sleeve 24 and a thermal insulation pad 25; the radiation plate 21 is arranged on the side wall of the bracket 19 close to the radiation cooling cover mechanism 3 through the titanium screw 22, and the back plate 23 is arranged on the outer wall of the bracket 19 to prevent the thermal control multilayer from hooking (the thermal control multilayer is arranged between the back plate 23 and the bracket 19, and between the bracket 19 and the radiation plate 21), and the surface is treated with high emissivity black, which can absorb a certain amount of stray light, avoid the reflection of stray light when the thermal control multilayer is exposed, and adapt to large temperature differences. The thermal control multilayer is to reduce heat leakage and reduce the influence of the environment on the temperature of the radiation plate 21, and ensure the temperature uniformity of the radiation plate 21;

[0095] An insulating T-shaped sleeve 24 is provided between the radiation plate 21 and the titanium screw 22; an insulating pad 25 is provided between the radiation plate 21 and the bracket 19. The load 2 is a functional component that performs a certain function, and has two positions for cutting out the light path and cutting into the light path. In this embodiment, the load 2 is an offset load structure as a whole, and is not balanced, which reduces the volume and weight of the device of the present invention. The radiation plate 21 is a black body, the inner side of the black body is coated with black paint, and a heating plate is pasted on the outer side. It is installed in an insulated manner and is installed on the bracket 19 through an insulating T-shaped sleeve 24, an insulating pad 25 and a titanium screw 22 to ensure an insulated installation. There are four titanium screws 22, and the heads are coated with silicone rubber. In an emergency, the head of the titanium screw 22 is in direct contact with the collision rubber 34 to reduce the emergency impact force.

[0096] like Figure 5 , Figure 6 As shown, the radiation cooling cover mechanism 3 is composed of a radiation cooling cover shell 31, a collision fixing block 32, a collision nut 33, a collision rubber 34, a heat pipe 35, a heat pipe clamp 36, a flexible pad 37 and a screw anti-slip baffle 38; the radiation cooling cover shell 31 is adapted to the size of the back plate 23; the collision fixing block 32 is arranged on the inner wall of the radiation cooling cover shell 31 close to the radiation plate 21 through the collision nut 33; the collision rubber 34 is arranged inside the collision fixing block 32, and is used to directly contact with the titanium screw 22 to reduce the emergency impact force when the load 2 cuts out of the optical path; the heat pipe 35 is arranged on the outer wall of the radiation cooling cover shell 31 through the heat pipe clamp 36 and the screw; the flexible pad 37 is arranged between the heat pipe clamp 36 and the other side wall of the radiation cooling cover shell 31; the screw anti-slip baffle 38 is bonded to the outer wall of the heat pipe clamp 36. The radiant cooling cover mechanism 3 provides a low temperature environment of less than or equal to 20°C (293K) to the radiation plate 21 in the load 2 through radiation heat transfer, and can provide a high temperature environment of greater than 20°C (293K) through the heating plate on the back (i.e., between the bracket 19 and the back plate 23).

[0097] Preferably, four collision rubbers 34 are provided on the side wall of the radiation cooling cover shell 31 close to the radiation plate 21, and are fixed by collision fixing blocks 32. The collision fixing blocks 32 are screwed into the radiation cooling cover shell 31 through threads, and are reinforced and fixed by collision nuts 33. When the load 2 is released in an emergency, the collision rubber 34 contacts the titanium screw 22 to absorb the impact energy. The heat pipe 35 is fixed to the other side wall of the radiation cooling cover shell 31 through screws and heat pipe clamps 36. The screws are passed through the flat washers, elastic washers, flat washers, heat pipe clamps 36, and flexible pads 37 in sequence, and screwed into the radiation cooling cover shell 31; the screw anti-slip baffle 38 is glued to the heat pipe clamp 36 to ensure that when disassembling and assembling the heat pipe 35, there is no need to remove other parts, that is, decoupling. The heat pipe 35 can be taken out or loaded by only loosening or tightening the screws, which is conducive to operation in a small space. The heat pipe 35 is used to connect with the on-board cold plate facing the deep cold space (200K) to ensure a low temperature environment.

[0098] like Figure 7 , Figure 8 As shown, the emergency reset mechanism 11 includes a coil spring box 101, a coil spring shaft 102 coaxially rotatably arranged in the coil spring box 101, a reset disk 103 connected to the upper end of the coil spring shaft 102, an emergency lever 104 connected to the lower end of the coil spring shaft 102, a flat coil spring 105 located between the coil spring shaft 102 and the coil spring box 101, an upper cover plate 106 located between the reset disk 103 and the upper end of the coil spring box 101, a locking nut 107 for fixing the reset disk 103, a bearing 108 and a swing rod 109; the pin puller 13 is arranged on the outer wall of the coil spring box 101; the upper end of the coil spring shaft 102 passes through the upper cover plate in sequence. 106, the reset disk 103 is connected with the locking nut 107; the reset disk 103 is evenly distributed along the circumference with a plurality of external pin holes that cooperate with the pin puller pins; the inner interface of the flat coil spring 105 is connected with the coil spring shaft 102, and the outer interface is snap-fitted with the coil spring box 101, and the flat coil spring 105 is used to drive the emergency lever 104 to rotate during emergency reset; the shaft 4 is connected to the first raised seat 14 through the bearing 108, and the upper end of the shaft 4 passes through the first raised seat 14 and is fixedly connected with the swing rod 109; the emergency lever 104 cooperates with the swing rod 109, and is used to push the swing rod 109 during emergency reset, thereby driving the shaft 4 to rotate so that the load 2 cuts out of the optical path.

[0099] The emergency reset mechanism 11 is used to cut the load 2 out of the optical path through the flat coil spring 105 in the event of failure such as a control circuit or cable breakage, so as to prevent the main optical path from being blocked. The emergency reset mechanism 11 is not physically connected to the rotating shaft 4 of the load 2, and is decoupled in design, thereby improving on-track reliability. The outer diameter of the flat coil spring 105 in the free state is larger than the outer diameter of the coil spring box 101. When the flat coil spring 105 is received in the coil spring box 101, it has a certain amount of stored torque in the installation position. In this embodiment, the outer diameter of the flat coil spring 105 in the free state is 85 mm, and the outer diameter in the contracted state is 60 mm.

[0100] like Fig. 9 , Fig.10As shown, the flexible connection mechanism 7 includes a first connection terminal 71, a second connection terminal 72 and a third connection terminal 73 which are connected in sequence from bottom to top along the axial direction; the first connection terminal 71 is provided with a semicircular hole 711 which is adapted to the output shaft of the drive motor 12, and is used to connect with the output shaft of the drive motor 12 and limit the radial free rotation of the drive motor 12; a rotating shaft pin hole 731 is provided on the circumferential side wall of the third connection terminal 73; the third connection terminal 73 is connected to the lower end of the rotating shaft 4 through the rotating shaft pin and the rotating shaft pin hole 731; a spring sheet 74 is respectively provided between the first connection terminal 71 and the second connection terminal 72, and between the second connection terminal 72 and the third connection terminal 73, and a boss hole 75 is respectively provided on the end surface of the first connection terminal 71 and the third connection terminal 73 close to the second connection terminal 72, and the boss hole 75 is used to ensure that the spring sheet 74 has a certain deformation space after installation.

[0101] like Fig.11 As shown, along the axonometric measurement of the direct-drive bistable cut-in or cut-out type eccentric load calibration device, it can be seen that the locking pin puller 17 of the cut-out position of the load 2 is arranged on the base 1 through the locking pin puller cutting pad 172, on which a locking pin puller pin 171 is arranged, and the locking pin puller 17 is used to be electrically connected to the external device through the electrical connector assembly 10; the load 2 is fixedly connected to the side wall of the rotating shaft 4 through the bracket 19; the locking pin hole member 18 cooperates with the locking pin puller 17 and is arranged on the bracket 19, and a tapered hole 181 is provided at its end, and the tapered hole 181 is adapted to the locking pin puller pin 171, which is used to ensure that the locking pin puller pin 171 can be smoothly extended and retracted in the locking pin puller 17.

[0102] like Fig.12 As shown, along the axonometric measurement (i.e., P direction) of the direct-drive bistable cut-in or cut-out type eccentric load calibration device, the installation positions of the limit rotation mechanism 9 and the rotating shaft 4, the limit fixing mechanism 8 and the base 1 at the cut-out position of the load 2 can be seen. Fig.13 As shown, the limiting and fixing mechanism 8 is arranged at the lower end of the first protruding seat 14, and includes an arc-shaped body 81, a cutting-out limiting surface 82 and a cutting-in limiting surface 83 respectively arranged at both ends of the lower end surface of the arc-shaped body 81, a first stable-state trap 84 and a second stable-state trap 85 arranged between the cutting-out limiting surface 82 and the cutting-in limiting surface 83, and three glue injection grooves 86 arranged between the first stable-state trap 84 and the second stable trap 85; the glue injection grooves 86 are used to assist in fixing the arc-shaped body 81.

[0103] like Fig.14As shown, the limit rotation mechanism 9 is arranged at the lower end of the rotating shaft 4 near the first protruding seat 14 and includes a limit rotation rod 91, a limit ball 92, a limit spring 93 and a locking screw 94; one end of the limit rotation is fixedly connected to the rotating shaft 4 by a screw, and the other end is used to swing between the cut-out limit surface 82 and the cut-in limit surface 83 when the rotating shaft 4 rotates; the limit ball 92, the limit spring 93, and the locking screw 94 are arranged in the mounting hole from top to bottom in sequence; the limit ball 92 cooperates with the first stable trap 84, and in the cut-out state, falls into the first stable trap 84 for limiting when the load 2 cuts out of the optical path; the limit ball 92 cooperates with the second stable trap 85, and in the cut-in state, falls into the second stable trap 85 for limiting when the load 2 cuts into the optical path; the limit spring 93 is a compression spring, and the compression amount of the limit spring 93 can be adjusted by rotating the axial position of the locking screw 94, thereby adjusting the preload force of the limit ball 92.

[0104] The limiting fixing mechanism 8 is an integrated design, and the material used is tin bronze plated with solid lubricant. The first stable trap 84 corresponds to the cut-out position of the load 2 (i.e., the 0-degree position), and the second stable trap 85 corresponds to the cut-in position of the load 2 (i.e., the 95-degree position). Preferably, the first stable trap 84 and the second stable trap 85 are both conical hemispherical holes, and the ball diameter is consistent with the nominal diameter of the limiting ball 92, both of which are 4 mm, and the fitting clearance is a positive tolerance. The cut-out limit surface 82 and the cut-in limit surface 83 are the two extreme positions of the direct-drive bistable cut-in or cut-out type eccentric load calibration device of the present invention, which are 1.5° away from the working position (i.e., the angles between the limiting rotating rod 91 and the cut-out limit surface 82 and the cut-in limit surface 83 are both 1.5°).

[0105] like Fig.15 As shown, the magnetic steel element 5 is composed of a magnetic steel seat 51, a magnetic steel protective shell 52 and a magnetic steel 54 inside the magnetic steel protective shell 52; one end of the magnetic steel seat 51 is fixedly connected to the base 1; the magnetic steel protective shell 52 is arranged at the other end of the magnetic steel seat 51, and a magnetic steel magnetic limiting hole 53 is arranged on the magnetic steel protective shell 52; the magnetic steel protective shell 52 is made of metal material, preferably aluminum alloy. The magnetic steel protective shell 52 is provided with a magnetic steel magnetic limiting hole 53, which can improve the accuracy of Hall sensing. The magnetic steel elements 5 are divided into two groups, one group is set at the 0 degree position after the load 2 is cut in, and the other group is set at the 95 degree position after the load 2 is cut out, which are respectively used to judge the position status of the radiation plate 21. The two magnetic steel elements 5 cooperate with a Hall element 6 to realize the accurate transmission of the load position.

[0106] like Fig.16 , Fig.17As shown, the Hall element 6 is composed of a Hall cover plate 61, a Hall seat 62, a Hall bracket 63, and a Hall chip circuit 64; one end of the Hall bracket 63 is fixedly connected to the rotating shaft 4 near the lower side wall of the second protruding seat 15, and the Hall cover plate 61 and the Hall seat 62 are arranged at the other end of the Hall bracket 63; the Hall chip circuit 64 is arranged between the Hall cover plate 61 and the Hall seat 62, and is used to form a magnetic induction current signal with the magnetic steel 54; the Hall cover plate 61 is respectively provided with an outlet groove 611 and a Hall sensing hole 612; the outlet groove 611 is used to lead out the connection line of the Hall chip in the Hall chip circuit 64 to be electrically connected to the external device through the electrical connector assembly 10, and is fixed to the base 1 with a cable clamp 100; the Hall sensing hole 612 corresponds to the magnetic steel magnetic limiting hole 53, marking the theoretical sensing position of the Hall chip. In this embodiment, the materials of the Hall cover 1 and the Hall seat 62 are both heat-insulating polyimide, which is used to prevent the Hall chip circuit 64 from changing in accuracy due to temperature changes.

[0107] like Fig.19 As shown, in other embodiments, one end of the magnetic steel seat 51 is fixedly connected to the rotating shaft 4; one end of the two Hall brackets 63 is fixedly connected to the base 1 respectively.

[0108] When the load 2 is cut out of the optical path, the locking pin puller 17 is in a locked state. The maximum temperature of the radiation plate 21 is 360K and the minimum temperature is 210K; the temperature of the radiation cooling cover shell 31 is 205K. Fig.18 As shown, the working surfaces of the radiation cooling cover shell 31 and the radiation plate 21 are respectively provided with micro-cone structures and coated with a high emissivity coating, which can greatly improve the radiation capacity on orbit. At this time, the radiation plate 21 and the radiation cooling cover shell 31 face each other, and the low temperature 205K of the radiation cooling cover shell 31 can be transferred to the radiation plate 21 through radiation heat exchange, so that their temperatures tend to be consistent (considering the case of heat leakage, there is a 5K temperature difference).

[0109] In order to ensure that the load 2 is not damaged by collision during the satellite launch phase, the load 2 is matched with the pin puller pin of the locking pin puller 17 through the locking pin hole 18 to ensure reliable fixation during the satellite launch phase and prevent the load 2 from rotating randomly and uncontrolled. The locking pin puller 17 is connected to the base 1 by screws through the locking pin puller trimming pad 172. The locking pin puller trimming pad 172 is made of glass fiber reinforced plastic material, which can not only adjust the position of the locking pin puller 17 to avoid introducing large assembly stress, but also prevent the locking pin puller 17 from being triggered by mistake due to the temperature exceeding the working range through heat insulation.

[0110] When the load 2 cuts into the optical path, the radiation plate 21 cuts into the main optical path, the magnetic steel element 5 is aligned with the Hall element 6 on the cut-in side, and the A position signal is output to the external device. At this time, the limit ball 92 in the limit rotation mechanism 9 falls into the second stable trap 85.

[0111] When the load 2 cuts out of the optical path, the radiation plate 21 cuts out of the main optical path, the magnetic steel element 5 is aligned with the Hall element 6 on the cut-out side, and the B position signal is output to the external device. At this time, the limiting ball 92 in the limiting rotation mechanism 9 falls into the first stable trap 84.

[0112] In other embodiments, the radiation plate 21 can be a black body, or a gray body, or a diffuse reflection plate, or a plane reflector; the drive motor 12 can also adopt a torque motor with more complex control; the Hall element 6 adopts the Hall induction principle, or can also be a photoelectric switch principle, or a micro switch principle.

[0113] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A direct-drive bistable cut-in or cut-out type eccentric load calibration device, characterized in that: It comprises a base (1), an emergency reset mechanism (11), a drive motor (12), a rotating shaft (4), a load (2) for blocking the light path during on-track calibration, a radiation cooling cover mechanism (3), a pin puller (13), and a position sensor; The emergency reset mechanism (11) is located at the upper end of the base (1); The driving motor (12) is located at the lower end of the base (1); The upper end of the rotating shaft (4) cooperates with the emergency reset mechanism (11), and the lower end thereof is connected to the driving motor (12); One side of the load (2) is fixedly connected to the middle of the rotating shaft (4) and can rotate along with the rotating shaft (4); The radiant cooling cover mechanism (3) is fixedly connected to the base (1) and is used to receive the load (2) after the optical path is cut out, and to provide radiant cooling to the load (2) in the cut-out state; The pin puller (13) is arranged on the emergency reset mechanism (11) and is used to open the emergency reset mechanism (11) when the control circuit fails; The position sensor comprises a Hall element (6) and two magnetic steel elements (5); the Hall element (6) is fixedly connected to the rotating shaft (4) and rotates with the rotating shaft (4); the two magnetic steel elements (5) are located on the rotation path of the Hall element (6) when the load (2) cuts out of the optical path or cuts into the optical path; Alternatively, the position sensor comprises two Hall elements (6) and a magnetic steel element (5), wherein the magnetic steel element (5) is fixedly connected to the rotating shaft (4) and rotates with the rotating shaft (4), and the two Hall elements (6) are located on the rotation path of the magnetic steel element (5) when the load (2) cuts out of the optical path or cuts into the optical path.

2. According to claim 1, a direct-drive bistable cut-in or cut-out type eccentric load calibration device is characterized in that: It also includes a flexible connection mechanism (7); the flexible connection mechanism (7) includes a first connection terminal (71), a second connection terminal (72) and a third connection terminal (73) which are sequentially connected from bottom to top along the axial direction; The first connecting terminal (71) is provided with a semicircular hole (711) adapted to the output shaft of the driving motor (12); A rotating shaft pin hole (731) is provided on the circumferential side wall of the third connecting terminal (73); the third connecting terminal (73) is connected to the lower end of the rotating shaft (4) via the rotating shaft pin and the rotating shaft pin hole (731); A spring sheet (74) is provided between the first connecting terminal (71) and the second connecting terminal (72), and between the second connecting terminal (72) and the third connecting terminal (73), respectively. Boss holes (75) for mounting the spring sheet (74) are provided on the end surfaces of the first connecting terminal (71) and the third connecting terminal (73) close to the second connecting terminal (72), respectively. The boss holes (75) are used to ensure that the spring sheet (74) has a certain deformation space after installation.

3. According to claim 2, a direct-drive bistable cut-in or cut-out type eccentric load calibration device is characterized in that: The base (1) comprises a first protruding seat (14) located at the upper end of the base (1), and a second protruding seat (15) and a third protruding seat (16) located at the lower end; The emergency reset mechanism (11) is arranged at the upper end of the first protruding seat (14); The upper end of the rotating shaft (4) passes through the first protruding seat (14) to be connected to the emergency reset mechanism (11), and the lower end passes through the second protruding seat (15) to be connected to the third connecting terminal (73); The magnetic steel element (5) and the Hall element (6) are arranged at the lower end of the rotating shaft (4) and located between the second protruding seat (15) and the third protruding seat (16); The driving motor (12) is arranged at the lower end of the third protruding seat (16), and its output end passes through the third protruding seat (16) and is connected to the first connecting terminal (71).

4. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 3, characterized in that: The emergency reset mechanism (11) comprises a coil spring box (101), a coil spring shaft (102) coaxially rotatably arranged in the coil spring box (101), a reset disk (103) connected to the upper end of the coil spring shaft (102), an emergency lever (104) connected to the lower end of the coil spring shaft (102), a plane coil spring (105) located between the coil spring shaft (102) and the coil spring box (101), an upper cover plate (106) located between the reset disk (103) and the upper end of the coil spring box (101), a locking nut (107) for fixing the reset disk (103), a bearing (108), and a swing rod (109); The pin puller (13) is arranged on the outer wall of the coil spring box (101); The upper end of the coil spring shaft (102) passes through the upper cover plate (106), the reset plate (103) and is connected to the locking nut (107) in sequence; The reset disk (103) is evenly distributed along the circumference with a plurality of external pin holes that cooperate with the pins of the pin puller (13); The inner interface of the planar coil spring (105) is connected to the coil spring rotating shaft (102), and the outer interface is clamped with the coil spring box (101). The planar coil spring (105) is used to drive the emergency lever (104) to rotate during emergency resetting. The rotating shaft (4) and the first protruding seat (14) are connected via a bearing (108), and the upper end of the rotating shaft (4) passes through the first protruding seat (14) and is fixedly connected to the swing rod (109); The emergency lever (104) cooperates with the swing lever (109) and is used to push the swing lever (109) during emergency resetting, thereby driving the rotating shaft (4) to rotate so that the load (2) cuts out of the light path.

5. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 4, characterized in that: It also includes a position-limiting fixing mechanism (8) arranged at the lower end of the first protruding seat (14) and a position-limiting rotating mechanism (9) arranged on the rotating shaft (4) near the lower end of the first protruding seat (14); The limiting and fixing mechanism (8) comprises an arc-shaped body (81), a cutting-out limiting surface (82) and a cutting-in limiting surface (83) respectively arranged at two ends of the lower end surface of the arc-shaped body (81), and a first stable trap (84) and a second stable trap (85) arranged between the cutting-out limiting surface (82) and the cutting-in limiting surface (83); The position-limiting rotation mechanism (9) comprises a position-limiting rotation rod (91), a position-limiting ball (92), a position-limiting spring (93) and a locking screw (94); One end of the limit rotation rod (91) is fixedly connected to the rotation shaft (4), and the other end is used to swing between the cut-out limit surface (82) and the cut-in limit surface (83) when the rotation shaft (4) rotates; The other end of the limit rotation rod (91) is provided with an axial mounting hole, and the limit ball (92), the limit spring (93), and the locking screw (94) are sequentially arranged in the mounting hole from top to bottom; the limit ball (92) cooperates with the first stable trap (84) to limit the position when the load (2) cuts out of the optical path; or, the limit ball (92) cooperates with the second stable trap (85) to limit the position when the load (2) cuts into the optical path; The locking screw (94) adjusts the pre-tightening force of the limiting ball (92) by adjusting the compression amount of the limiting spring (93).

6. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 5, characterized in that: It also includes a locking pin puller (17), a locking pin hole member (18) and a bracket (19); The locking pin puller (17) is arranged on the base (1), and a locking pin puller pin (171) is arranged on the base, and the locking pin puller (17) is used to be electrically connected to an external device; The load (2) is fixedly connected to the side wall of the rotating shaft (4) via a bracket (19); The locking pin hole member (18) is arranged on the bracket (19) and corresponds to the position of the locking pin puller (17). The end of the locking pin hole member (18) is provided with a tapered hole (181). The tapered hole (181) cooperates with the locking pin puller pin (171) and is used to lock the rotating shaft (4) when the load (2) cuts out the optical path.

7. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 6, characterized in that: The magnetic steel element (5) comprises a magnetic steel seat (51), a magnetic steel protective shell (52), and a magnetic steel (54) arranged inside the magnetic steel protective shell (52); The Hall element (6) comprises a Hall cover plate (61), a Hall seat (62), a Hall bracket (63) and a Hall chip circuit (64); One end of the two magnetic steel seats (51) is respectively fixedly connected to the base (1); one end of the Hall bracket (63) is respectively fixedly connected to the rotating shaft (4); or one end of the magnetic steel seat (51) is respectively fixedly connected to the rotating shaft (4); one end of the two Hall brackets (63) is respectively fixedly connected to the base (1); The magnetic steel protective shell (52) is arranged at the other end of the magnetic steel seat (51), and a magnetic steel magnetic limiting hole (53) is arranged on the magnetic steel protective shell (52); The Hall cover plate (61) and the Hall seat (62) are arranged at the other end of the Hall bracket (63), and the Hall chip circuit (64) is arranged between the Hall cover plate (61) and the Hall seat (62) to form a magnetic induction current signal with the magnetic steel (54); The Hall cover plate (61) is provided with a wire outlet slot (611) and a Hall sensing hole (612) respectively; the wire outlet slot (611) is used to lead out the connection wire of the Hall chip in the Hall chip circuit (64) to be electrically connected to an external device; the Hall sensing hole (612) is used to correspond to the magnetic steel magnetic limiting hole (53) and mark the theoretical sensing position of the Hall chip.

8. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 7, characterized in that: The load (2) comprises a radiation plate (21), a titanium screw (22), a back plate (23), a thermal insulation T-shaped sleeve (24) and a thermal insulation pad (25); The radiation plate (21) is arranged on a side wall of the bracket (19) close to the radiation cooling cover mechanism (3) when the load (2) cuts out the light path through a titanium screw (22); the back plate (23) is arranged on the other side wall of the bracket (19); and a thermal control multilayer is arranged between the back plate (23) and the bracket (19) and between the radiation plate (21) and the bracket (19); A heat-insulating T-shaped sleeve (24) is sleeved between the radiation plate (21) and the titanium screw (22); A heat insulation pad (25) is provided between the radiation plate (21) and the bracket (19).

9. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 8, characterized in that: The radiant cooling cover mechanism (3) comprises a radiant cooling cover shell (31), a collision fixing block (32), a collision nut (33), a collision rubber (34), a heat pipe (35), a heat pipe clamp (36), a flexible pad (37) and a screw anti-slip baffle (38); The radiation cooling hood shell (31) is fixed on the base (1), and the radiation cooling hood shell (31) is compatible with the back plate (23) in size; The collision fixing block (32) is arranged on the inner side wall of the radiation cooling cover shell (31) close to the radiation plate (21) through the collision nut (33) when the load (2) cuts out the light path; The collision rubber (34) is arranged on the collision fixing block (32) and corresponds to the position of the titanium screw (22), and is used for directly contacting with the titanium screw (22) to reduce the emergency impact force when the load (2) cuts out of the optical path; The heat pipe (35) is arranged on the outer side wall of the radiation cooling cover shell (31) through a heat pipe clamp (36), and the heat pipe (35) is used to connect with the on-board cold plate to ensure a low temperature environment; The heat pipe clamp (36) is connected to the radiation cooling cover shell (31) by means of screws, and the flexible pad (37) is arranged at the connection between the heat pipe clamp (36) and the radiation cooling cover shell (31); The screw anti-slip baffle (38) is bonded to the outer wall of the heat pipe clamp (36) and is located outside the screw.

10. A direct-drive bistable cut-in or cut-out type eccentric load calibration device according to claim 9, characterized in that: Also included are a heat-insulating trimming pad (132) and a locking pin puller trimming pad (172); The pin puller (13) is arranged on the outer wall of the coil spring box (101) via a heat-insulating trimming pad (132); The locking pin puller (17) is arranged on the base (1) via a locking pin puller trimming pad (172); The position-limiting and fixing mechanism (8) further comprises a plurality of glue injection grooves (86) arranged between the first stable trap (84) and the second stable trap (85) for assisting in fixing the arc-shaped body (81); The driving motor (12) is a stepping motor with winding backup; The radiation plate (21) is a black body, the inner side of the black body is coated with black paint, and the outer side is pasted with a heating plate.

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