Multi-degree-of-freedom high-precision detector adjusting mechanism

Abstract

The invention discloses a multi-degree-of-freedom high-precision detector adjusting mechanism, and belongs to the technical field of detectors. The mechanism comprises an optical installation platform and an adjusting module installed on one side of the optical installation platform, the adjusting module is connected with a detector installed on the other side of the optical installation platform through a transition module, and dynamic adjustment during fixed connection of the adjusting module and the transition module can be guaranteed through elastic connection between the adjusting module and the transition module. The attitude adjustment of the transition module by the adjustment module is completely transferred to the detector through the rigid connection between the transition module and the detector. The problems that in the prior art, the alignment precision of a detector and an optical lens is low, and posture adjusting equipment for guaranteeing the alignment precision is complex in structure and tedious in operation are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of detectors, and in particular relates to a multi-degree-of-freedom high-precision detector adjustment mechanism. Background Art

[0002] An infrared detector is a device that converts incident infrared radiation signals into electrical signal outputs. Infrared radiation is an electromagnetic wave with a wavelength between visible light and microwaves, which is imperceptible to the human eye. To detect the existence of this radiation and measure its strength, it must be converted into other physical quantities that can be detected and measured. Limited by the optical lens processing and adjustment process and the infrared detector preparation process, the position and posture of the detector needs to be adjusted to ensure that the detector has a clear image of the external scene. The alignment accuracy between the detector and the optical lens directly affects the imaging quality of the product. Therefore, in order to improve the imaging quality of the product and enhance product performance, it is necessary to design a multi-degree-of-freedom and high-precision detector auxiliary adjustment mechanism to achieve high-precision alignment between the detector image plane and the optical lens. Summary of the invention

[0003] Technical issues to be solved:

[0004] In order to avoid the shortcomings of the prior art, the present invention provides a multi-degree-of-freedom high-precision detector adjustment mechanism, which sets a transition module between the adjustment module and the detector, and indirectly transfers the posture adjustment of the transition module to the detector, so that the detector can achieve multi-degree-of-freedom high-precision posture adjustment. The present invention solves the problem that the alignment accuracy between the detector and the optical lens is low in the prior art, and the posture adjustment equipment structure is complex and cumbersome to operate in order to ensure the alignment accuracy.

[0005] The technical solution of the present invention is: a multi-degree-of-freedom high-precision detector adjustment mechanism, including an optical mounting platform and an adjustment module installed on one side thereof, the adjustment module is connected to the detector installed on the other side of the optical mounting platform through a transition module, and the elastic connection between the adjustment module and the transition module can ensure dynamic adjustment when the two are fixedly connected, and the posture adjustment of the transition module performed by the adjustment module is completely transferred to the detector through the rigid connection between the transition module and the detector.

[0006] A further technical solution of the present invention is: the transition module is a columnar structure coaxially installed in the adjustment module, the top end of which passes through the through hole on the optical mounting platform and is fixedly connected to the detector, and the bottom end is connected to a fastener passing through the center hole at the bottom of the adjustment module, and an elastic part is arranged between the fastener and the bottom of the adjustment module, and the elastic connection between the transition module and the adjustment module is realized through the cooperation of the fastener and the elastic part.

[0007] A further technical solution of the present invention is: the transition module is a top screw adjustment block, which has threaded holes at the top and bottom ends, and is fixedly connected to the detector and the adjustment module by screws respectively; the middle part is a shoulder with a diameter larger than the two ends, and four adjustment positioning grooves are evenly distributed along the circumferential direction on the outer surface of the shoulder, which are used to limit the position of the transition module when the adjustment module adjusts the XY direction.

[0008] A further technical solution of the present invention is: the adjustment module comprises an adjustment outer frame and a first adjustment screw and a second adjustment screw mounted thereon, the adjustment outer frame is a hollow cavity structure with an open top, and the open top end thereof abuts against the bottom surface of the optical mounting platform as a mechanical interface;

[0009] The outer peripheral surface of the side wall of the adjustment outer frame is uniformly distributed with four through holes along the circumferential direction, which correspond to the four adjustment positioning grooves on the transition module one by one. Four first adjustment screws are respectively passed through the four through holes on the peripheral surface and pushed into the adjustment positioning grooves of the transition module. The position adjustment of the transition module in the XY direction is completed by screwing the first adjustment screws along the radial direction of the transition module, thereby adjusting the position of the detector in the XY direction.

[0010] The bottom surface of the adjustment outer frame has multiple through holes evenly distributed along the circumferential direction, which are arranged opposite to the bottom annular surface of the shoulder of the transition module. Multiple second adjustment screws are respectively passed through the multiple through holes on the bottom surface to the bottom annular surface of the shoulder of the transition module. The position adjustment of the transition module in the Z direction is completed by synchronously screwing the multiple second adjustment screws along the axial direction of the transition module. The angle adjustment of the transition module is completed by synchronously screwing the second adjustment screws on the same side along the axial direction of the transition module, thereby adjusting the position or angle of the detector in the Z direction.

[0011] A further technical solution of the present invention is that the screw head of the adjusting screw is a ball head structure to ensure point contact with the transition module.

[0012] A further technical solution of the present invention is that the head of the adjusting screw is knurled and a hexagonal wrench opening is provided on the top.

[0013] A further technical solution of the present invention is: the elastic member is an annular elastic sheet of elastic material, a cross support beam is provided inside the ring, a through hole is opened in the center of the cross support beam for passing the fastener; a through hole is opened at the same radial position on each arm for passing the second adjustment screw; a plurality of spherical protrusions are evenly distributed in the circumferential direction on the upper edge of the annular surface to ensure point contact with the bottom surface of the adjustment module.

[0014] A further technical solution of the present invention is that the elastic sheet is a circular ring structure, and four spherical protrusions are evenly distributed along the circumference on the ring surface.

[0015] A further technical solution of the present invention is that the fastener is a mounting screw, which is installed in cooperation with the threaded hole at the bottom end of the transition module.

[0016] A method for adjusting the posture of a detector by a multi-degree-of-freedom high-precision detector adjustment mechanism, the specific steps are as follows:

[0017] The detector is placed on the optical mounting platform, and the transition module located below the optical mounting platform is fixedly connected to the detector by fasteners;

[0018] The adjustment module is coaxially mounted on the transition module, and its mechanical interface is fitted to the bottom surface of the optical mounting platform. The mounting screws penetrate the elastic member and the bottom surface of the adjustment module and are screwed into the threaded holes at the bottom end of the transition module to complete the fixed installation of the adjustment module.

[0019] Screw the four first adjustment screws into the through holes on the peripheral surface of the adjustment module, and screw the four second adjustment screws into the through holes on the bottom surface of the adjustment module;

[0020] According to the deviation from the optical lens, screw the adjustment screws at different positions to complete the alignment between the detector and the optical lens;

[0021] When the first adjustment screw in the circumferential direction is screwed, the deviation of the detector along the XY direction is adjusted;

[0022] When the second adjusting screw in the axial direction is simultaneously screwed, the deviation of the detector in the Z direction is adjusted;

[0023] When the second, different adjustment screw is turned, the angular deviation of the detector is adjusted.

[0024] Beneficial Effects

[0025] The beneficial effects of the present invention are as follows: the multi-degree-of-freedom high-precision detector adjustment mechanism of the present invention ensures that the detector component is in close contact with the mounting base plate through the elastic deformation of the elastic sheet, and the detector is adjusted in multiple degrees of freedom under the action of 8 adjustment screws. The high-precision adjustment of the detector can be achieved by designing the adjustment screws and adjusting the pitch of the outer frame mounting thread. As an auxiliary device for detector adjustment, the mechanism can achieve multi-dimensional high-precision and precise adjustment of the detector, ensure the alignment of the detector with the optical system, and improve the imaging quality of the product. The mechanism can be removed after the detector adjustment is completed without adding extra volume and weight to the system, and the overall volume of the mechanism is small, which can be applied to detector adjustment conditions in a variety of scenarios. The high-precision multi-degree-of-freedom adjustment of the detector is achieved to ensure the imaging quality of the system.

[0026] The present invention adopts an adjusting screw to adjust the position angle, and only needs to design different pitches to achieve the adjustment of different accuracy requirements of the detector.

[0027] The present invention provides a transition module between the adjustment outer frame and the detector, through which the adjustment of translation or deflection is transmitted to the detector, and the wall surface directly acts on the detector to deform its structure.

[0028] The present invention uses an elastic sheet of highly elastic material to achieve an elastic connection between the transition module and the adjustment outer frame, which can ensure dynamic adjustment when the two are fixedly connected, and achieve a close fit between the detector component and the base plate mounting plane through elastic deformation, while ensuring that the detector component can be fine-tuned in rotation or translation under the action of the adjustment screw.

[0029] The top end of the adjusting screw of the present invention is designed as a ball head configuration, which ensures point contact between the adjusting screw and the top screw adjusting block, and ensures that the detector does not generate mutual coupling when multiple degrees of freedom are adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an axonometric diagram of the working principle of the multi-degree-of-freedom high-precision detector adjustment mechanism in an embodiment of the present invention;

[0031] Figure 2 It is an exploded view of the connection between the multi-degree-of-freedom high-precision detector adjustment mechanism and the optical platform in an embodiment of the present invention;

[0032] Figure 3 is a cross-sectional view of the working principle of the multi-degree-of-freedom high-precision detector adjustment mechanism in an embodiment of the present invention;

[0033] Figure 4 It is a bottom schematic diagram of a multi-degree-of-freedom high-precision detector adjustment mechanism in an embodiment of the present invention;

[0034] Figure 5 It is an exploded view of a multi-degree-of-freedom high-precision detector adjustment mechanism in an embodiment of the present invention;

[0035] Figure 6 is an axonometric view of an elastic sheet according to an embodiment of the present invention;

[0036] Figure 7 It is an axonometric view of the adjustment screw in the embodiment of the present invention.

[0037] Explanation of the accompanying reference numerals: 1. Adjustment of the outer frame, 2. Top screw adjustment block, 3. Elastic sheet, 4. Adjustment screw, 5. Mounting screw, 6. Multi-degree-of-freedom high-precision detector adjustment, 7. Optical mounting platform, 8. Optical lens, 9. Detector. DETAILED DESCRIPTION

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Based on the problems in the prior art that the alignment accuracy between the detector and the optical lens is low, and in order to ensure the alignment accuracy, the posture adjustment equipment has a complex structure and cumbersome operation, a multi-degree-of-freedom high-precision detector adjustment mechanism is proposed, including an optical mounting platform and an adjustment module installed on one side thereof, the adjustment module is connected to the detector installed on the other side of the optical mounting platform through a transition module, and the elastic connection between the adjustment module and the transition module can ensure dynamic adjustment when the two are fixedly connected, and the posture adjustment of the transition module performed by the adjustment module is completely transferred to the detector through the rigid connection between the transition module and the detector.

[0041] Specifically, the transition module is a columnar structure coaxially installed in the adjustment module, the top end of which passes through the through hole on the optical mounting platform and is fixedly connected to the detector, and the bottom end is connected to a fastener passing through the center hole at the bottom of the adjustment module. An elastic part is arranged between the fastener and the bottom of the adjustment module, and the elastic connection between the transition module and the adjustment module is achieved through the cooperation of the fastener and the elastic part.

[0042] Specifically, the transition module is a top screw adjustment block, which has threaded holes at the top and bottom ends, and is fixedly connected to the detector and the adjustment module by screws respectively; the middle part is a shoulder with a diameter larger than the two ends, and four adjustment positioning grooves are evenly distributed along the circumference on the outer surface of the shoulder, which are used to limit the position of the transition module when the adjustment module adjusts the XY direction.

[0043] Specifically, the adjustment module includes an adjustment outer frame and a first adjustment screw and a second adjustment screw installed thereon. The adjustment outer frame is a hollow cavity structure with an open top, and its top open end is used as a mechanical interface to abut against the bottom surface of the optical mounting platform; the outer peripheral surface of the side wall of the adjustment outer frame is evenly distributed with four through holes along the circumferential direction, which correspond to the four adjustment positioning grooves on the transition module one by one, and the four first adjustment screws are respectively passed through the four through holes on the peripheral surface and pushed into the adjustment positioning groove of the transition module, and the position of the transition module in the XY direction is completed by screwing the first adjustment screw along the radial direction of the transition module. The position of the detector is adjusted in the XY direction; the bottom surface of the adjustment outer frame is evenly distributed with multiple through holes along the circumferential direction, which are arranged opposite to the bottom annular surface of the shoulder of the transition module, and multiple second adjustment screws are respectively passed through the multiple through holes on the bottom surface to the bottom annular surface of the shoulder of the transition module, and the position of the transition module in the Z direction is adjusted by synchronously screwing the multiple second adjustment screws along the axial direction of the transition module, and the angle of the transition module is adjusted by synchronously screwing the second adjustment screws on the same side along the axial direction of the transition module, thereby adjusting the position or angle of the detector in the Z direction.

[0044] Specifically, the screw head of the adjusting screw is a ball head structure to ensure point contact with the transition module; the head is knurled and a hexagonal wrench opening is provided on the top.

[0045] Specifically, the elastic member is an annular elastic sheet of elastic material, a cross support beam is provided inside the ring, a through hole is opened in the center of the cross support beam, for passing the fastener; a through hole is opened at the same radial position on each arm, for passing the second adjustment screw; a plurality of spherical protrusions are evenly distributed circumferentially on the upper edge of the ring surface to ensure point contact with the bottom surface of the adjustment module.

[0046] Specifically, the elastic sheet is a circular ring structure, and four spherical protrusions are evenly distributed along the circumference of the ring surface.

[0047] Specifically, the fastener is a mounting screw, which is installed in cooperation with the threaded hole at the bottom end of the transition module.

[0048] The present invention provides a method for adjusting the detector posture by a multi-degree-of-freedom high-precision detector adjustment mechanism, and the specific steps are as follows:

[0049] Step 1: Place the detector on the optical mounting platform, and fix the transition module located under the optical mounting platform to the detector through fasteners;

[0050] Step 2: Coaxially mount the adjustment module on the transition module, with its mechanical interface fitted to the bottom surface of the optical mounting platform. The mounting screws penetrate the elastic member and the bottom surface of the adjustment module and are screwed into the threaded holes at the bottom end of the transition module to complete the fixed installation of the adjustment module.

[0051] Step 3: Screw the four first adjustment screws into the through holes on the peripheral surface of the adjustment module, and screw the four second adjustment screws into the through holes on the bottom surface of the adjustment module;

[0052] Step 4: According to the deviation from the optical lens, tighten the adjustment screws at different positions to complete the alignment between the detector and the optical lens;

[0053] When the first adjustment screw in the circumferential direction is screwed, the deviation of the detector along the XY direction is adjusted;

[0054] When the second adjusting screw in the axial direction is simultaneously screwed, the deviation of the detector in the Z direction is adjusted;

[0055] When the second, different adjustment screw is turned, the angular deviation of the detector is adjusted.

[0056] The above technical solution is further described below with reference to the accompanying drawings and examples:

[0057] Reference Figure 1-5 As shown, the present embodiment is a multi-degree-of-freedom high-precision detector adjustment mechanism, comprising an adjustment outer frame 1, a top screw adjustment block 2, an elastic sheet 3, and an adjustment screw 4 mounting screw. The elastic deformation of the elastic sheet ensures that the detector component is in close contact with the mounting base plate, and the detector is adjusted in multiple degrees of freedom under the action of the 8 adjustment screws. The high-precision adjustment of the detector can be achieved by designing the pitch of the adjustment screw and the mounting thread of the adjustment outer frame.

[0058] The adjustment outer frame 1 of the multi-degree-of-freedom high-precision detector adjustment mechanism is designed with a mechanical interface to be fixed to the detector mounting base plate, and provides a multi-point mounting interface for the adjustment screw 4 to ensure that the detector can achieve multi-degree-of-freedom adjustment. The thread that cooperates with the adjustment screw 4 can be designed with different pitches according to the adjustment accuracy.

[0059] The top screw adjustment block 2 of the multi-degree-of-freedom high-precision detector adjustment mechanism is docked and installed with the detector component and the elastic sheet 3 through a mechanical interface, and a docking plane is provided at the docking position of the corresponding adjustment screw 4 to ensure that it can perform corresponding translation or rotation under the drive of the adjustment screw;

[0060] The elastic sheet 3 of the multi-degree-of-freedom high-precision detector adjustment mechanism is made of highly elastic material, and the detector component is closely fitted to the bottom plate mounting plane through elastic deformation, while ensuring that the detector component can be fine-tuned to rotate or translate under the action of the adjustment screw 4;

[0061] The top of the adjustment screw 4 of the multi-degree-of-freedom high-precision detector adjustment mechanism is designed with a ball head configuration to ensure that it is in contact with the top screw adjustment block at two points, ensuring that the detectors do not produce mutual coupling during multi-degree-of-freedom adjustment. As an auxiliary device for detector adjustment, the mechanism can be removed after the detector adjustment is completed, without adding extra volume and weight to the system, and the overall volume of the mechanism is small, which can be applied to detector adjustment conditions in a variety of scenarios.

[0062] In summary, the invention provides a multi-degree-of-freedom high-precision detector adjustment mechanism, which ensures that the detector component is in close contact with the mounting base plate through elastic deformation of the elastic sheet, and performs multi-degree-of-freedom adjustment of the detector under the action of 8 adjustment screws, and can achieve high-precision adjustment of the detector by designing the adjustment screws and adjusting the pitch of the outer frame mounting thread. As an auxiliary device for detector adjustment, the mechanism can be removed after the detector adjustment is completed, without adding extra volume and weight to the system, and the overall volume of the mechanism is small, and can be applied to detector adjustment conditions in a variety of scenarios.

[0063] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention without departing from the principles and intent of the present invention.

Claims

1. A multi-degree-of-freedom high-precision detector adjustment mechanism, characterized in that: The optical mounting platform comprises an adjustment module installed on one side thereof; the adjustment module is connected to a detector installed on the other side of the optical mounting platform via a transition module; the elastic connection between the adjustment module and the transition module can ensure dynamic adjustment when the two are fixedly connected; the posture adjustment of the transition module by the adjustment module is completely transferred to the detector via the rigid connection between the transition module and the detector.

2. According to claim 1, a multi-degree-of-freedom high-precision detector adjustment mechanism is characterized in that: The transition module is a columnar structure coaxially installed in the adjustment module, the top end of which passes through the through hole on the optical mounting platform and is fixedly connected to the detector, and the bottom end is connected to a fastener passing through the center hole at the bottom of the adjustment module. An elastic part is arranged between the fastener and the bottom of the adjustment module, and the elastic connection between the transition module and the adjustment module is realized through the cooperation of the fastener and the elastic part.

3. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 2, characterized in that: The transition module is a top screw adjustment block, which has threaded holes at the top and bottom ends, and is fixedly connected to the detector and the adjustment module by screws respectively; the middle part is a shoulder with a diameter larger than the two ends, and four adjustment positioning grooves are evenly distributed along the circumference on the outer surface of the shoulder, which are used to limit the position of the transition module when the adjustment module adjusts the XY direction.

4. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 3, characterized in that: The adjustment module comprises an adjustment outer frame and a first adjustment screw and a second adjustment screw mounted thereon, wherein the adjustment outer frame is a hollow cavity structure with an open top, and the open top end thereof abuts against the bottom surface of the optical mounting platform as a mechanical interface; The outer peripheral surface of the side wall of the adjustment outer frame is uniformly distributed with four through holes along the circumferential direction, which correspond to the four adjustment positioning grooves on the transition module one by one. Four first adjustment screws are respectively passed through the four through holes on the peripheral surface and pushed into the adjustment positioning grooves of the transition module. The position adjustment of the transition module in the XY direction is completed by screwing the first adjustment screws along the radial direction of the transition module, thereby adjusting the position of the detector in the XY direction. The bottom surface of the adjustment outer frame has multiple through holes evenly distributed along the circumferential direction, which are arranged opposite to the bottom annular surface of the shoulder of the transition module. Multiple second adjustment screws are respectively passed through the multiple through holes on the bottom surface to the bottom annular surface of the shoulder of the transition module. The position adjustment of the transition module in the Z direction is completed by synchronously screwing the multiple second adjustment screws along the axial direction of the transition module. The angle adjustment of the transition module is completed by synchronously screwing the second adjustment screws on the same side along the axial direction of the transition module, thereby adjusting the position or angle of the detector in the Z direction.

5. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 4, characterized in that: The screw head of the adjusting screw is a ball head structure to ensure point contact with the transition module.

6. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 5, characterized in that: The head of the adjusting screw is knurled, and a hexagonal wrench opening is arranged on the top.

7. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 4, characterized in that: The elastic part is an annular elastic sheet of elastic material, with a cross support beam inside the ring, a through hole in the center of the cross support beam for passing the fastener; a through hole is opened at the same radial position on each arm for passing the second adjustment screw; a plurality of spherical protrusions are evenly distributed in the circumferential direction on the upper edge of the ring surface to ensure point contact with the bottom surface of the adjustment module.

8. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 7, characterized in that: The elastic sheet is a circular ring structure, and four spherical protrusions are evenly distributed along the circumference of the ring surface.

9. The multi-degree-of-freedom high-precision detector adjustment mechanism according to claim 1, characterized in that: The fastener is a mounting screw, which is installed in cooperation with the threaded hole at the bottom end of the transition module.

10. A method for adjusting the detector posture by using the multi-degree-of-freedom high-precision detector adjustment mechanism according to any one of claims 1 to 9, characterized in that The specific steps are as follows: The detector is placed on the optical mounting platform, and the transition module located below the optical mounting platform is fixedly connected to the detector by fasteners; The adjustment module is coaxially mounted on the transition module, and its mechanical interface is fitted to the bottom surface of the optical mounting platform. The mounting screws penetrate the elastic member and the bottom surface of the adjustment module and are screwed into the threaded holes at the bottom end of the transition module to complete the fixed installation of the adjustment module. Screw the four first adjustment screws into the through holes on the peripheral surface of the adjustment module, and screw the four second adjustment screws into the through holes on the bottom surface of the adjustment module; According to the deviation from the optical lens, screw the adjustment screws at different positions to complete the alignment between the detector and the optical lens; When the first adjustment screw in the circumferential direction is screwed, the deviation of the detector along the XY direction is adjusted; When the second adjusting screw in the axial direction is simultaneously screwed, the deviation of the detector in the Z direction is adjusted; When the second, different adjustment screw is turned, the angular deviation of the detector is adjusted.

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