High-speed rotating filter wheel device

Abstract

The present application relates to the technical field of filter wheels, and the embodiment specifically discloses a high-speed rotating filter wheel device, including: a component mounting seat, a torque motor, a filter mounting seat, a bearing, a capacitive angle sensor, and a filter, wherein the component mounting seat is set in an annular shape, and the torque motor is set in the inner ring of the component mounting seat; the filter mounting seat is set in an annular shape, and the filter mounting seat is set in the inner ring of the component mounting seat through the bearing, and the outer ring of the filter mounting seat is rotatably connected to the inner ring of the component mounting seat; the capacitive angle sensor includes a fixed electrode plate and a rotating electrode plate, the fixed electrode plate is connected to the component mounting seat, and the rotating electrode plate is connected to the filter mounting seat; the filter is set in the inner ring of the filter mounting seat, and the filter adopts a zone coating. The problem that the filter wheel device in the prior art is difficult to meet the requirements of the filter-type imaging spectrometer for accurate positioning, stable rotation and rapid switching of the filter wheel in the airborne application scenario is solved.

Description

Technical Field

[0001] The present application relates to the technical field of filter wheels, and in particular to a high-speed rotating filter wheel device. Background Art

[0002] At present, the filter wheel device in airborne filter-type imaging spectrometers often uses a DC brushless micromotor and a block filter to form a filter wheel device. The DC brushless micromotor and the block filter form a filter wheel device, which lacks an angle feedback element or has a low feedback progress, a complex gear transmission mechanism with backlash, and filters that are too scattered or have strange shapes and complex processing. Therefore, it is difficult to meet the needs of the filter-type imaging spectrometer for accurate positioning, stable rotation and fast switching of the filter wheel in airborne application scenarios. Summary of the invention

[0003] The purpose of the present application is to provide a high-speed rotating filter wheel device to solve the problem that the filter wheel device in the prior art is difficult to meet the requirements of accurate positioning, stable rotation and rapid switching of the filter wheel in airborne application scenarios of filter-type imaging spectrometers.

[0004] To achieve the above-mentioned purpose, the embodiment of the present application provides a high-speed rotating filter wheel device, including: a component mounting seat, a torque motor, a filter mounting seat, a bearing, a capacitive angle sensor, and a filter, wherein:

[0005] The component mounting seat is arranged in a ring shape, and the torque motor is arranged in the inner ring of the component mounting seat;

[0006] The filter mounting seat is arranged in a ring shape, and the filter mounting seat is arranged in the inner ring of the component mounting seat through the arranged bearing, and the outer ring of the filter mounting seat is rotatably connected with the inner ring of the component mounting seat;

[0007] The capacitive angle sensor comprises a fixed electrode plate and a rotating electrode plate, wherein the fixed electrode plate is connected to the component mounting seat, and the rotating electrode plate is connected to the filter mounting seat;

[0008] The filter is arranged on the inner circle of the filter mounting seat, and the filter is coated by partition.

[0009] Optionally, the upper end of the torque motor is connected to the component mounting seat, and the rotating shaft at the lower end of the torque motor is meshed with the outer ring of the filter mounting seat through teeth to drive the filter mounting seat to rotate.

[0010] Optionally, it also includes:

[0011] The motor outer pressure ring is arranged in a ring shape, and the outer ring of the motor outer pressure ring is connected to the left end of the component mounting seat;

[0012] The left side of the torque motor abuts against the right side of the motor outer pressure ring;

[0013] The motor inner pressure ring is arranged in a ring shape and is connected to the outer ring of the filter mounting seat;

[0014] The rotating shaft of the torque motor is meshed with the right side of the inner pressure ring of the motor through teeth.

[0015] Optionally, the capacitive angle sensor is located on the left side of the torque motor, and its fixed pole plate is connected to the outer pressure ring of the motor.

[0016] Optionally, it also includes:

[0017] An angle sensor pressing ring, the angle sensor pressing ring is arranged in a ring shape, and the angle sensor pressing ring is connected to the left end of the filter mounting seat;

[0018] The left side of the rotating electrode plate of the capacitive angle sensor abuts against the right side of the angle sensor pressing ring, and the right side of the rotating electrode plate of the capacitive angle sensor abuts against the first protrusion of the outer ring of the filter mounting seat.

[0019] Optionally, the outer ring of the bearing is connected to the inner ring of the component mounting seat, and the inner ring of the bearing is connected to the outer ring of the filter mounting seat.

[0020] Optionally, it also includes:

[0021] A bearing outer pressure ring, wherein the bearing outer pressure ring is arranged in a ring shape, and the upper end of the bearing outer pressure ring is connected to the component mounting seat;

[0022] The left side of the outer ring of the bearing abuts against the right side of the outer pressure ring of the bearing, and the right side of the outer ring of the bearing abuts against the second protrusion of the inner ring of the component mounting seat;

[0023] The inner pressure ring of the bearing is arranged in a ring shape and is connected to the right end of the filter mounting seat;

[0024] The right side of the inner ring of the bearing abuts against the left side of the inner pressure ring of the bearing, and the left side of the inner ring of the bearing abuts against the third protrusion of the outer ring of the filter mounting seat.

[0025] Optionally, the diameter of the left end of the filter mounting seat is smaller than the diameter of the right end thereof;

[0026] The bearing is arranged on the outer ring of the right end of the filter mounting seat;

[0027] The filter is installed on the left inner circle of the filter mounting seat.

[0028] Optionally, it also includes:

[0029] A filter pressing ring, wherein the filter pressing ring is arranged in a ring shape, and the outer ring of the filter pressing ring is connected to the inner ring of the filter mounting seat;

[0030] The right side of the filter abuts against the left side of the filter pressing ring, and the left side of the filter abuts against the fourth protrusion of the inner ring of the filter mounting seat.

[0031] Optionally, it also includes:

[0032] A drive control board, the drive control board is electrically connected to the torque motor, the capacitive angle sensor and an external optoelectronic chip respectively;

[0033] The drive control board is used to receive power from the outside and communicate with the outside in a two-way manner, receive an external synchronization control signal, and align the position of the filter with the integration time of the optoelectronic chip;

[0034] The drive control board is also used to provide power to the torque motor and the capacitive angle sensor, drive the torque motor to rotate, and collect the torque motor current and analyze the position information fed back by the capacitive angle sensor.

[0035] The embodiments of the present application have the following advantages:

[0036] Compared with the prior art, the novel high-speed rotating filter wheel device provided by the above technical solution utilizes an annular component mounting seat sleeve to be arranged on the outer ring of the filter mounting seat, and enables the filter mounting seat to rotate relative to the component mounting seat, and drives it to rotate through a torque motor, and measures its rotation angle through a capacitive angle sensor, thereby rotating the entire filter mounted on the inner ring of the filter mounting seat with a partition coating to a suitable angle, so that the corresponding partition coating is aligned with the light aperture to achieve filtering. As a result, the filter wheel device has good position accuracy, fast motor response, no transmission backlash, and convenient processing of the filter partition coating, which can meet the requirements of airborne filter spectrometers for accurate positioning, stable rotation and fast switching of the filter wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0038] Figure 1 A three-dimensional cross-sectional view of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0039] Figure 2A left side view of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0040] Figure 3 A right side view of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0041] Figure 4 A schematic diagram of a dual-band two-partition filter of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0042] Figure 5 A schematic diagram of a dual-band four-partition filter of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0043] Figure 6 A schematic diagram of filter rotation of a high-speed rotating filter wheel device provided by at least one embodiment of the present application;

[0044] Figure 7 An electrical block diagram of a high-speed rotating filter wheel device provided in at least one embodiment of the present application.

[0045] Meaning of the numbers in the accompanying drawings:

[0046] 1. Component mounting seat, 2. Torque motor, 3. Capacitive angle sensor, 31. Fixed plate, 32. Rotating plate, 4. Filter mounting seat, 5. Filter, 6. Bearing, 7. Motor outer pressure ring, 8. Motor inner pressure ring, 9. Angle sensor pressure ring, 10. Filter pressure ring, 11. Bearing outer pressure ring, 12. Bearing inner pressure ring, 13. Drive control board, 14. Rotating shaft, 15. First protrusion, 16. Second protrusion, 17. Third protrusion, 18. Fourth protrusion. DETAILED DESCRIPTION

[0047] The following is a description of the implementation of the present application by specific specific embodiments. People familiar with the technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0048] In the description of the present application, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "set", "install", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0050] The present application embodiment provides a high-speed rotating filter wheel device, referring to Figures 1 to 3 ,include:

[0051] Component mounting seat 1, torque motor 2, filter mounting seat 4, bearing 6, capacitive angle sensor 3, filter 5, wherein:

[0052] The component mounting seat 1 is arranged in a ring shape, and the torque motor 2 is arranged in the inner ring of the component mounting seat 1;

[0053] The filter mounting seat 4 is arranged in a ring shape, and the filter mounting seat 4 is arranged in the inner ring of the component mounting seat through the bearing 6, and the outer ring of the filter mounting seat is rotatably connected with the inner ring of the component mounting seat 1;

[0054] The capacitive angle sensor 3 includes a fixed electrode plate 31 and a rotating electrode plate 32, wherein the fixed electrode plate 31 is connected to the component mounting seat 1, and the rotating electrode plate 32 is connected to the filter mounting seat 4;

[0055] The optical filter 5 is arranged on the inner circle of the optical filter mounting seat 4, and the optical filter 5 is coated by partitions.

[0056] Specifically, the component mounting seat 1 is sleeved outside the outer ring of the filter mounting seat 4, and the two are connected by bearing 6. The filter mounting seat 4 can rotate along the common central axis of the two. The torque motor 2 is arranged between the component mounting seat 1 and the filter mounting seat 4, and is used to drive the filter mounting seat 4 to rotate. The rotating plate 32 of the capacitive angle sensor 3 is connected to the filter mounting seat 4, and is used to drive the position of the rotating plate 32 relative to the fixed plate 31 to change when the angle of the filter mounting seat 4 changes, thereby changing the relative area between the two plates of the capacitive angle sensor 3. This change will cause the capacitance of the capacitor to change, thereby reflecting the change of the measured angle. By rotating the filter mounting seat 4 by a certain angle, the filter 5 is driven to rotate, so that the corresponding coating partition is aligned with the light aperture to achieve filtering.

[0057] Specifically, the torque motor 2 can use a brushless DC torque motor 2. The selection calculation of the brushless DC torque motor 2 needs to consider several categories such as friction torque and inertia load torque. The friction torque M1 needs to comprehensively consider typical application conditions, structural friction coefficient, positive pressure per unit area of ​​the contact surface, contact surface area and friction radius to calculate the friction force under the condition. The inertia load torque M2 is the torque required to meet the acceleration and deceleration performance of the equipment and overcome the inertia or disturbance of the platform itself. M2=J×ω, where J is the load moment of inertia of the servo component and ω is the load angular acceleration. The total synthetic torque M= M1+ M2. Consider a certain safety factor when selecting, generally more than 1.2 times.

[0058] In some embodiments, the filter 5 can be coated in different zones to achieve cutoff and transmission of different wavelength bands, such as Figure 4 and Figure 5 As shown, considering that optoelectronic chips in certain bands need to be corrected for non-uniformity, shutter correction areas and different band areas are symmetrically set.

[0059] Specifically, the size of the filter 5 is related to the size of the aperture, and the size of the filter 5 determines the selection of the torque motor 2 and the angle sensor. Assuming that the radius of the aperture is r, the rotation radius of the center of the aperture is a, and the radius of the filter 5 is R, Figure 6 shown.

[0060] Specifically, assuming the frame rate is f, the time of a single frame image is 1 / f, one circle produces N frames of images, and the rotation speed is N / f. The integration time of a single frame image is t, and the angle rotated during the single frame integration time is t / (N / f)×360°. The opening angle of the aperture relative to the rotation center of the filter 5 is 2 arcsin(r / a), so (2arcsin(r / a)+ t / (N / f)×360°)×N+2arcsin(r / a) ×2≤360°, and the rotation radius of the aperture a≥r / sin((1-tf) ×360° / (2N+4)), the radius of the filter 5 R≥r+a= r(1+1 / sin((1-tf) ×360° / (2N+4)) ).

[0061] Specifically, assuming that the frame rate is f=25 Hz, the number of frames per circle is N=2, the integration time is t=6 ms, and the aperture is 14 mm, the required motor speed is 750 r / min, and the radius of the filter 5 is R≥36.5 mm.

[0062] Specifically, assuming that the frame rate is f=50 Hz, the number of frames per circle is N=4, the integration time is t=6 ms, and the aperture is 14 mm, the required motor speed is 750 r / min, and the radius of the filter 5 is R≥53.1 mm.

[0063] In some embodiments, the upper end of the torque motor 2 is connected to the component mounting base 1, and the rotating shaft 14 at the lower end of the torque motor 2 is meshed with the outer ring of the filter mounting base 4 through teeth to drive the filter mounting base 4 to rotate.

[0064] Specifically, the upper end of the torque motor 2 is fixed on the component mounting base 1, and the rotating shaft 14 of the torque motor 2 is meshed with the teeth carved on the outer ring of the filter mounting base 4 through the sleeved gears or carved teeth. In some embodiments, the length direction of these teeth points to the central axis of the filter mounting base 4. In some embodiments, there can be multiple torque motors 2, for example, two or four torque motors 2 can be symmetrically distributed, so that the rotation of the filter mounting base 4 is more stable and rapid.

[0065] In some embodiments, it also includes:

[0066] The motor outer pressure ring 7 is arranged in a ring shape, the outer ring of the motor outer pressure ring 7 is connected to the left end of the component mounting seat 1, and the left side of the torque motor 2 is abutted against the right side of the motor outer pressure ring 7;

[0067] The motor inner pressure ring 8 is arranged in a ring shape, and the motor inner pressure ring 8 is connected to the outer ring of the filter mounting seat 4 , and the rotating shaft 14 of the torque motor 2 is meshed with the right side of the motor inner pressure ring 8 through teeth.

[0068] Specifically, the torque motor 2 is more firmly fixed by the abutment and meshing connection between the motor outer pressure ring 7 and the motor inner pressure ring 8 .

[0069] In some embodiments, the capacitive angle sensor 3 is located on the left side of the torque motor 2 , and its fixed pole plate 31 is connected to the motor outer pressure ring 7 .

[0070] In some embodiments, it also includes:

[0071] The angle sensor pressing ring 9 is arranged in a ring shape, the angle sensor pressing ring 9 is connected to the left end of the filter mounting seat 4, the left side of the rotating electrode plate 32 of the capacitive angle sensor 3 abuts against the right side of the angle sensor pressing ring 9, and the right side of the rotating electrode plate 32 of the capacitive angle sensor 3 abuts against the first protrusion 15 of the outer ring of the filter mounting seat 4.

[0072] Specifically, the first protrusion 15 may be an annular step arranged around the outer ring of the filter mounting seat 4 , and the rotating pole plate 32 is fixed on the outer ring of the filter mounting seat 4 by clamping the angle sensor pressing ring 9 and the first protrusion 15 .

[0073] In some embodiments, the outer ring of the bearing 6 is connected to the inner ring of the component mounting seat 1 , and the inner ring of the bearing 6 is connected to the outer ring of the filter mounting seat 4 .

[0074] Specifically, the bearing 6 can be a high-precision thin-walled bearing 6.

[0075] In some embodiments, it also includes:

[0076] The bearing outer pressure ring 11 is configured as an annular protrusion, the upper end of the bearing outer pressure ring 11 is connected to the component mounting seat 1, the left side of the outer ring of the bearing 6 abuts against the right side of the bearing outer pressure ring 11, and the right side of the outer ring of the bearing 6 abuts against the second protrusion 16 of the inner ring of the component mounting seat 1;

[0077] The bearing inner pressure ring 12 is arranged in a ring shape, and the bearing inner pressure ring 12 is connected to the right end of the filter mounting seat 4, the right side of the inner ring of the bearing 6 abuts against the left side of the bearing inner pressure ring 12, and the left side of the inner ring of the bearing 6 abuts against the third protrusion 17 of the outer ring of the filter mounting seat 4.

[0078] Specifically, the second protrusion 16 and the third protrusion 17 can be set as annular protrusions. By clamping the outer pressure ring 11 of the bearing and the second protrusion 16, and clamping the inner pressure ring 12 of the bearing and the third protrusion 17, the bearing 6 is fixed between the component mounting seat 1 and the filter mounting seat 4, thereby playing the role of rotationally connecting the two.

[0079] In some embodiments, the diameter of the left end of the filter mount 4 is smaller than the diameter of the right end thereof, the bearing 6 is arranged on the right end outer ring of the filter mount 4 , and the filter 5 is installed on the left end inner ring of the filter mount 4 .

[0080] In some embodiments, it also includes:

[0081] The filter pressing ring 10 is arranged in a ring shape, the outer ring of the filter pressing ring 10 is connected to the inner ring of the filter mounting seat 4, the right side of the filter 5 is abutted against the left side of the filter pressing ring 10, and the left side of the filter 5 is abutted against the fourth protrusion 18 of the inner ring of the filter mounting seat 4.

[0082] Specifically, the fourth protrusion 18 can be set as an annular protrusion, and the filter 5 is fixed in the filter mounting seat 4 by clamping the outer ring of the filter 5 by the filter pressing ring 10 and the fourth protrusion 18.

[0083] In some embodiments, it also includes:

[0084] Drive control board 13, reference Figure 7 The drive control board 13 is electrically connected to the torque motor 2, the capacitive angle sensor 3 and the external optoelectronic chip respectively, and is used to receive power from the outside and communicate with the outside in both directions, receive an external synchronization control signal, align the position of the filter 5 with the integration time of the external optoelectronic chip, and provide power to the torque motor 2 and the capacitive angle sensor 3. Drive the torque motor 2 to rotate, collect the current of the torque motor 2 and analyze the position information fed back by the capacitive angle sensor 3.

[0085] In summary, compared with the prior art, the novel high-speed rotating filter wheel device utilizes an annular component mounting seat 1 to be sleeved on the outer ring of the filter mounting seat 4, and enables the filter mounting seat 4 to rotate relative to the component mounting seat 1, and is driven to rotate by the torque motor 2, and its rotation angle is measured by the capacitive angle sensor 3, so that the whole filter 5 with partition coating installed on the inner ring of the filter mounting seat 4 is rotated to a suitable angle, so that the corresponding partition coating is aligned with the light aperture to achieve filtering. Thus, the filter wheel device has good position accuracy. Compared with the traditional DC brushless micromotor filter wheel device, the torque motor 2 has fast response and no transmission backlash, and the capacitive angle sensor 3 has the characteristics of high feedback accuracy, stable rotation, fast switching, etc. The filter 5 partition coating is easy to process, and there is no need to process filters with strange shapes, complex processes, and high costs, which can meet the requirements of airborne filter spectrometers for accurate positioning, stable rotation, and fast switching of the filter wheel.

[0086] Note that, unless otherwise directly stated, all features disclosed in this specification (including any attached claims, abstracts and drawings) may be replaced by alternative features for achieving the same, equivalent or similar purposes. Therefore, unless otherwise explicitly stated, each feature disclosed is only an example of a group of equivalent or similar features. Where used, further, preferably, further and more preferably are simple beginnings for elaborating another embodiment based on the aforementioned embodiment, and the content of further, preferably, further or more preferably followed by the aforementioned embodiment is combined with the complete composition of another embodiment. Several further, preferably, further or more preferably settings following the same embodiment can be arbitrarily combined to form another embodiment.

[0087] In the implementation of functions and steps, the corresponding functions and steps in various embodiments may also occur in a different order than shown. For example, two consecutive functions and steps may actually be performed or implemented substantially in parallel, and they may sometimes be performed or implemented in the opposite order, depending on the functions involved.

[0088] Although the present application has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements may be made to the present application. Therefore, these modifications or improvements made without departing from the spirit of the present application all fall within the scope of protection claimed in the present application.

Claims

1. A high-speed rotating filter wheel device, characterized in that: include: A component mounting seat (1), a torque motor (2), a filter mounting seat (4), a bearing (6), a capacitive angle sensor (3), and a filter (5), wherein: The component mounting seat (1) is arranged in a ring shape, and the torque motor (2) is arranged in the inner ring of the component mounting seat (1); The filter mounting seat (4) is arranged in a ring shape, the filter mounting seat (4) is arranged in the inner ring of the component mounting seat (1) via the bearing (6), and the outer ring of the filter mounting seat (4) is rotatably connected to the inner ring of the component mounting seat (1); The capacitive angle sensor (3) is used to monitor the rotation angle of the filter mounting seat (4) in real time to ensure the accurate positioning of the filter (5), and comprises a fixed electrode plate (31) and a rotating electrode plate (32), wherein the fixed electrode plate (31) is connected to the component mounting seat (1), and the rotating electrode plate (32) is connected to the filter mounting seat (4); The optical filter (5) is arranged on the inner circle of the optical filter mounting seat (4), and the optical filter (5) adopts zoned coating, and the zoned coating includes at least two different coating areas, and each area corresponds to a different spectral range; The torque motor (2) adjusts its output torque according to feedback from the capacitive angle sensor (3); the upper end of the torque motor (2) is connected to the component mounting seat (1); and the rotating shaft (14) at the lower end of the torque motor (2) meshes with the outer ring of the filter mounting seat (4) through teeth, so as to drive the filter mounting seat (4) to rotate; Also includes: A motor outer pressure ring (7), wherein the motor outer pressure ring (7) is arranged in a ring shape, and the outer ring of the motor outer pressure ring (7) is connected to the left end of the component mounting seat (1); The left side of the torque motor (2) abuts against the right side of the motor outer pressure ring (7); A motor inner pressure ring (8), the motor inner pressure ring (8) being arranged in a ring shape, and the motor inner pressure ring (8) being connected to the outer ring of the filter mounting seat (4); The rotating shaft (14) of the torque motor (2) is meshed with the right side of the motor inner pressure ring (8) through teeth; The capacitive angle sensor (3) is located on the left side of the torque motor (2), and the fixed pole plate (31) is connected to the motor outer pressure ring (7); Also includes: An angle sensor pressing ring (9), the angle sensor pressing ring (9) is arranged in a ring shape, and the angle sensor pressing ring (9) is connected to the left end of the filter mounting seat (4); The left side of the rotating electrode plate (32) of the capacitive angle sensor (3) abuts against the right side of the angle sensor pressing ring (9), and the right side of the rotating electrode plate (32) of the capacitive angle sensor (3) abuts against the first protrusion (15) of the outer ring of the filter mounting seat (4); The outer ring of the bearing (6) is connected to the inner ring of the component mounting seat (1), and the inner ring of the bearing (6) is connected to the outer ring of the filter mounting seat (4); Also includes: A bearing outer pressure ring (11), the bearing outer pressure ring (11) is arranged in a ring shape, and the upper end of the bearing outer pressure ring (11) is connected to the component mounting seat (1); The left side of the outer ring of the bearing (6) abuts against the right side of the bearing outer pressure ring (11), and the right side of the outer ring of the bearing (6) abuts against the second protrusion (16) of the inner ring of the component mounting seat (1); A bearing inner pressure ring (12), the bearing inner pressure ring (12) being arranged in a ring shape, and the bearing inner pressure ring (12) being connected to the right end of the filter mounting seat (4); The right side of the inner ring of the bearing (6) abuts against the left side of the bearing inner pressure ring (12), and the left side of the inner ring of the bearing (6) abuts against the third protrusion (17) of the outer ring of the filter mounting seat (4); The diameter of the left end of the filter mounting seat (4) is smaller than the diameter of the right end thereof; The bearing (6) is arranged on the right outer ring of the filter mounting seat (4); The filter (5) is mounted on the inner circle of the left end of the filter mounting seat (4); Also includes: A filter pressing ring (10), the filter pressing ring (10) being arranged in a ring shape, the outer ring of the filter pressing ring (10) being connected to the inner ring of the filter mounting seat (4); The right side of the filter (5) abuts against the left side of the filter pressing ring (10), and the left side of the filter (5) abuts against the fourth protrusion (18) of the inner ring of the filter mounting seat (4); Also includes: a drive control board (13), the drive control board (13) being electrically connected to the torque motor (2), the capacitive angle sensor (3) and an external photoelectric chip respectively, the drive control board (13) being used to process a signal from the capacitive angle sensor (3) and to control the operation of the torque motor (2); The drive control board (13) is used to receive power from the outside and communicate with the outside in a two-way manner, receive an external synchronous control signal, and align the position of the filter (5) with the integration time of the optoelectronic chip; The drive control board (13) is also used to provide power to the torque motor (2) and the capacitive angle sensor (3), drive the torque motor (2) to rotate, and collect the current of the torque motor (2) and analyze the position information fed back by the capacitive angle sensor (3).

Images