An attitude adjustment device for an optical mirror box

Abstract

The application provides a posture adjusting device of an optical mirror box, which comprises a base, a bearing platform, an adjusting assembly and a differential protection assembly. The adjusting assembly comprises first and second lifting units arranged in parallel, which are connected and support the bearing platform through first and second flexible support elements. The lifting and pitching adjustment of the bearing platform and the optical mirror box thereon is realized by controlling the synchronous or differential motion of the two lifting units. The differential protection assembly is arranged between the two lifting units, which is used for monitoring the relative displacement between the two lifting units in real time, and triggering a hardware protection signal to forcibly stop the motion of the lifting units when the displacement reaches a preset safety threshold. The application realizes high-precision two-degree-of-freedom posture adjustment, effectively avoids the overload damage of the flexible support elements caused by the control system failure through the independent hardware differential protection mechanism, and significantly improves the reliability and safety of the device.

Description

Technical Field

[0001] This invention relates to the field of precision optical instrument technology, and in particular to an attitude adjustment device for an optical mirror box. Background Technology

[0002] In synchrotron radiation beamlines, to ensure the accuracy of experiments and beam performance, the spatial attitude adjustment precision and stability of some core optical components (such as monochromators and high-harmonic suppressor mirrors) supporting their mirror boxes are subject to extremely stringent requirements. The optical mirror box not only needs to be precisely positioned at specific spatial coordinates, but also needs to achieve angular pointing accuracy at the microradian level, and maintain this pose stably for a long period after adjustment. This requirement poses extremely high challenges to the resolution, repeatability, and stability of the adjustment device. Summary of the Invention

[0003] This invention provides an attitude adjustment device for an optical mirror box, which solves the technical problems of complex structure, high cost, high risk of overload damage, and insufficient system reliability of optical mirror box attitude adjustment devices.

[0004] The present invention provides an attitude adjustment device for an optical mirror box, comprising:

[0005] A support platform for mounting optical lens cases;

[0006] An adjustment assembly includes a first lifting unit and a second lifting unit, which are disposed opposite to each other on both sides of the bearing platform. The first lifting unit and the second lifting unit are respectively provided with a first flexible support element and a second flexible support element at the end of the first lifting unit and the second lifting unit near the bearing platform. The first flexible support element and the second flexible support element are connected to and support the bearing platform, and are used to realize the pitch adjustment of the bearing platform when there is a differential displacement between the first lifting unit and the second lifting unit.

[0007] A differential protection component is provided, with one end connected to the first lifting unit and the other end connected to the second lifting unit. The differential protection component is configured to monitor the relative displacement between the first lifting unit and the second lifting unit in real time, and to trigger a protection signal when the relative displacement reaches a preset threshold.

[0008] The beneficial effects of the present invention: The attitude adjustment device for the optical mirror box proposed in this invention forms a two-point adjustment structure through two sets of lifting units and is combined with flexible support elements to achieve precise adjustment of the two degrees of freedom of the optical mirror box in terms of lifting and pitch, which simplifies the system structure and effectively reduces the manufacturing cost.

[0009] By utilizing independently configured differential protection components, a hardware-level passive protection mechanism is provided, which can directly and in real time monitor the relative displacement difference between the two lifting units and actively trigger a protection signal when the displacement difference reaches a preset safety threshold. It has a fast response speed and extremely high reliability, fundamentally eliminating the risk of overload damage to flexible support components due to control system hardware and software failures.

[0010] Through a dual safety barrier of hardware and software collaboration, while achieving ultra-high precision adjustment, the fault tolerance, operational safety and long-term reliability of the entire device are significantly improved.

[0011] By using high-performance materials such as marble to construct the base and support platform, the overall stability of the device is effectively improved, ensuring long-term stability of the posture after adjustment.

[0012] Through overall optimized design, a balance of high precision, high stability, high reliability and high economy was achieved, solving the safety protection problem during precision optical adjustment. Attached Figure Description

[0013] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0014] In the attached diagram:

[0015] Figure 1 This is a schematic diagram of the overall structure of the attitude adjustment device for an optical mirror box provided in an embodiment of the present invention;

[0016] Figure 2 This is a partial structural schematic diagram of the attitude adjustment device for an optical mirror box provided in one embodiment of the present invention;

[0017] Figure 3 This is a schematic diagram of the differential protection component of the attitude adjustment device for an optical mirror box provided in one embodiment of the present invention.

[0018] The attached figures are labeled as follows:

[0019] 100. Base; 200. Adjustment assembly; 300. Support platform; 400. Differential protection assembly; 500. Optical lens box;

[0020] 210. First lifting unit; 211. First lifting platform; 212. First transmission unit; 213. First drive unit; 214. First position detection device; 215. Guide rail; 216. Slider; 217. Flexible hinge; 220. Second lifting unit;

[0021] 410. Trigger unit; 411. Scanning arm fixture; 412. Scanning arm;

[0022] 420. Sensing unit; 421. First limit switch; 422. Second limit switch; 423. Limit switch fixing component; 424. First limit switch mounting plate; 425. Second limit switch mounting plate. Detailed Implementation

[0023] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0024] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the invention. However, it will be apparent to those skilled in the art that embodiments of the invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the invention.

[0026] In synchrotron radiation beamlines, space optics, or high-end microscopic imaging systems, optical mirror boxes (containing high-value core optical components such as monochromators and focusing lenses) require precise positioning and orientation. This demands not only nanometer- or microradian-level positioning and pointing accuracy but also the ability to maintain their pose stably and reliably after adjustment, resisting environmental vibrations and thermal drift. To achieve pitch and height adjustment of the optical mirror box, a combination of multiple lifting platforms and flexible hinges is typically used. Flexible hinges are widely adopted as key components for precision motion transmission and angle fine-tuning due to their advantages of no mechanical friction, no backlash, and smooth movement. However, since flexible hinges rely on material deformation for operation, their allowable safe deformation angle is limited. If the control system software malfunctions, the actuator loses synchronization, or a misoperation occurs, one or more lifting platforms may move excessively, causing the corresponding flexible hinge bending angle to exceed its elastic limit, resulting in plastic deformation. This plastic deformation is irreversible, directly leading to loss of hinge accuracy, changes in stiffness, and even failure of the entire expensive adjustment device, resulting in significant economic losses and project delays. The closed-loop control of the lifting platform itself is susceptible to failure due to software vulnerabilities, response delays, or electrical interference, failing to provide fundamental safety redundancy. Therefore, there is an urgent need for an adjustment device that can ensure the safety and reliability of the system while providing precise adjustment.

[0027] Please see Figures 1 to 3 The present invention proposes an attitude adjustment device for an optical lens box, including a base 100, an adjustment component 200, a support platform 300, a differential protection component 400, and a control unit. The base 100 is used to install the adjustment assembly 200; the support platform 300 is used to install the optical lens box 500; the adjustment assembly 200 includes a first lifting unit 210 and a second lifting unit 220, which are arranged opposite to each other on both sides of the support platform 300, and the first lifting unit 210 and the second lifting unit 220 are respectively provided with a first flexible support element and a second flexible support element at the end of the first lifting unit 210 and the second lifting unit 220 near the support platform 300. The first flexible support element and the second flexible support element are connected to and support the support platform 300, and are used to realize the pitch adjustment of the support platform 300 when there is a differential displacement between the first lifting unit 210 and the second lifting unit 220; one end of the differential protection assembly 400 is connected to the first lifting unit 210 and the other end is connected to the second lifting unit 220. The differential protection assembly 400 is configured to monitor the relative displacement between the first lifting unit 210 and the second lifting unit 220 in real time, and trigger a protection signal when the relative displacement reaches a preset threshold.

[0028] Please see Figures 1 to 3This invention, by setting a flexible support element between the lifting unit and the support platform 300, enables the support platform 300 to achieve controlled pitch when there is differential displacement between the two lifting units. Through a dual-unit adjustment architecture combined with an independent differential protection component 400, it fundamentally solves the problem of overload damage to the flexible support element while achieving high-precision lifting and pitch two-degree-of-freedom adjustment. The two lifting units work together to achieve precise lifting and pitch adjustment; the structure is simple and low-cost. The differential protection component 400, independent of the main motion system, directly and passively monitors the relative motion deviation between the two lifting units, triggering protection immediately when the deviation exceeds the limit. Together with the software closed-loop control, it forms a double safety barrier, independently providing safety protection when the control system malfunctions, the position detection device fails, or the software algorithm fails to respond in time. While ensuring high-precision pitch adjustment capability, it significantly improves the reliability and long-term operational safety of the entire device.

[0029] Please see Figures 1 to 3 In one embodiment of the present invention, the base 100 is preferably made of a marble platform, which has excellent thermal stability and vibration damping characteristics. In other embodiments, the base 100 may also be made of high-rigidity metal materials. The base 100 is machined with mounting planes for installing the first lifting unit 210 and the second lifting unit 220, as well as several positioning holes, mounting holes, and guide structures. The bottom surface of the base 100 forms a reference plane relative to the external installation environment. It is fixed to the external frame or ground foundation using bolt connections, positioning pins, or other methods to maintain a stable spatial position. The first lifting unit 210 and the second lifting unit 220 are respectively installed on the left and right sides of the base 100 or other relative positions. The base 100 ensures the geometric parallelism and coplanarity of the mounting references of the two lifting units through precision-machined mounting surfaces and form and position tolerance control, avoiding the introduction of deviations. The base 100 may also integrate wiring channels, control unit mounting positions, and other related fixing components to achieve a compact structural layout and reasonable wiring planning. By adopting an integral high-rigidity base 100 structure, the influence of environmental vibration on the attitude of the bearing platform 300 can be significantly suppressed, while providing a stable and accurate motion reference for the adjustment component 200, thereby improving the overall dynamic response characteristics and attitude adjustment accuracy of the device.

[0030] Please see Figures 1 to 3In one embodiment of the present invention, the adjustment assembly 200 includes a first lifting unit 210 and a second lifting unit 220, which are arranged opposite each other on both sides of the support platform 300 along a first direction, parallel and spaced at a certain distance. For example, they can be symmetrically arranged on both sides below the support platform 300 along the length of the optical lens box 500, wherein the first direction is usually vertical. Each lifting unit undertakes the task of bearing and lifting adjustment on one side of the support platform 300. The two lifting units work together to realize the overall lifting and translation of the support platform 300. When there is differential displacement between the two lifting units, the flexible support element converts the differential into a pitch attitude change of the support platform 300. The adjustment assembly 200 adopts a symmetrical arrangement structure, which can reduce the influence of uneven load on the system. The spacing and relative position between the two lifting units can also be reasonably selected according to the mass distribution and center of gravity of the optical lens box 500, so that the pitch center of the support platform 300 is as close as possible to the optical center or structural center of gravity of the optical lens box 500, thereby reducing the impact of pitch adjustment on the imaging of the optical system. The adjustment component 200 has a simple and compact structure, and can achieve lifting and pitch adjustment through simple two-point support, which greatly reduces the complexity of the system and manufacturing cost.

[0031] Please see Figures 1 to 3 In one embodiment of the present invention, the first lifting unit 210 includes a first lifting platform 211, a first transmission part 212, a first drive part 213, and a first position detection device 214. The first lifting platform 211 is slidably connected to the base 100 through the first transmission part 212 and connected to the bearing platform 300 through a first flexible support element at its end; the first drive part 213 drives the first lifting platform 211 to slide along a first direction; the first position detection device 214 is disposed on the base 100 and / or the first lifting platform 211 and is used to detect the position of the first lifting platform 211. The first transmission part 212 converts the rotational motion of the first drive part 213 into the linear motion of the first lifting platform 211 and ensures the straightness of its motion trajectory. The first position detection device 214 provides real-time feedback on the precise position of the first lifting platform 211, forming a position closed-loop control to achieve high-resolution, high-repeatability precision adjustment.

[0032] Please see Figures 1 to 3In one embodiment of the present invention, the first transmission unit 212 includes a precision ball screw, which is driven by the first drive unit 213 through a coupling and connected to the base 100 through a bearing seat to ensure rotational accuracy. A linear guide pair is also provided on the base 100, with the guide rail 215 fixed to the base 100 and the slider 216 fixed to the first lifting platform 211. The linear guide pair provides high-rigidity, low-friction guiding support for the first lifting platform 211, thereby ensuring the straightness and repeatability of the first lifting platform 211's movement along the first direction. The ball screw provides driving force and displacement, converting rotational motion into linear lifting motion of the first lifting platform 211, while the guide rail 215 bears lateral force and ensures high linearity of movement, preventing the lifting platform from swaying or jamming during movement. The ball screw combines high transmission efficiency and bidirectional self-locking characteristics, enabling it to maintain the approximate position of the first lifting platform 211 in the event of power failure or emergency stop, preventing the support platform 300 and optical lens box 500 from rapidly sliding down due to their own weight, thereby improving system safety. The first drive unit 213 can be a servo motor, stepper motor, or linear motor, etc., and, in conjunction with an encoder or the rotation angle sensor of the motor body, achieves open-loop or closed-loop control through the control unit. The first position detection device 214 is set on the base 100 and / or the first lifting platform 211 to detect the real-time position of the first lifting platform 211 in the first direction. The high-precision transmission unit and position detection device significantly improve the height adjustment accuracy and repeatability of one side of the support platform 300, providing a reliable foundation for coordinated attitude control on both sides. It should be noted that the structure of the first transmission unit 212 is not limited; for example, it can also adopt a combination of crossed roller guides and a wedge-shaped inclined plane structure, as long as it can achieve smooth linear movement of the first lifting platform 211 along the first direction under the drive of the first drive unit 213.

[0033] Please see Figures 1 to 3In one embodiment of the present invention, the second lifting unit 220 includes a second lifting platform, a second transmission part, a second drive part, and a second position detection device. The second lifting platform is slidably connected to the base 100 via the second transmission part and connected to the bearing platform 300 via a second flexible support element at its end. The second drive part drives the second transmission part to slide along a first direction, thereby changing the height or pitch angle of the other side of the bearing platform 300. The second position detection device is disposed on the base 100 and / or the second lifting platform for detecting the position of the second lifting platform. The overall structure of the second lifting unit 220 can be completely identical to that of the first lifting unit 210, forming a pair of symmetrical drive chains. The symmetrical design not only facilitates the simplification of the control algorithm but also ensures the consistency of the mechanical properties of the two support points. It is understood that the specific implementation of the second transmission part, the second drive part, and the second position detection device can be the same as the description of the corresponding components in the first lifting unit 210, for example, both adopting a precision motion modular design of "servo motor + ball screw + linear guide + grating ruler". The two lifting units are independently controlled, but coordinated by the control unit to complete a composite motion of synchronous lifting or differential pitching.

[0034] Please see Figures 1 to 3In one embodiment of the present invention, the first flexible support element and the second flexible support element are flexible hinges 217. The flexible hinge 217 is a compliant mechanism that achieves relative rotation or small linear displacement through elastic deformation of the material. Its body can be a one-piece machined metal structure. By setting thinning areas or slots of specific shapes in certain areas, the area has high compliance, while the remaining parts have high rigidity. Therefore, it can withstand a certain load and generate controllable elastic deformation in a specific direction. Because the flexible hinge 217 exhibits a near-linear force-displacement relationship within its design range and has no mechanical backlash or friction, the pitch adjustment of the support platform 300 has good repeatability and high resolution, meeting the attitude control requirements of high-precision equipment such as the optical mirror box 500. In this embodiment, the first flexible support element is disposed at one end of the first lifting platform 211 and connected to the support platform 300; the second flexible support element is disposed at one end of the second lifting platform and connected to the support platform 300. The structure of the flexible hinge 217 can be a flat plate, a cross-shaped type, or a multi-layered laminated type, etc. Under the combined action of the two flexible support elements on both sides of the bearing platform 300, when the first lifting unit 210 and the second lifting unit 220 lift and lower synchronously in equal amounts, the two flexible hinges 217 mainly bear approximately pure tension and compression or a small range of bending, and the bearing platform 300 as a whole performs lifting and lowering movements. When there is differential displacement between the two lifting units, the two flexible hinges 217 generate different degrees of bending deformation. This differential deformation drives the bearing platform 300 to pitch and rotate around a certain virtual axis in its lateral direction. Since there is a definite geometric relationship between its bending angle and the height difference of the lifting platform and the distance between the two, the pitch adjustment amount and the driving amount are linear or precisely calibrated, which is convenient for control. It should be noted that the structure of the flexible support element is not limited. It can be a single-axis or double-axis flexible hinge, or other structures that work by material deformation. For example, it can use parallel leaf springs, leaf spring combination mechanisms, or other forms of compliant support structures, which can provide the degree of freedom of rotation around a specific axis, while having high stiffness in other directions.

[0035] Please see Figures 1 to 3In one embodiment of the present invention, the first position detection device 214 and / or the second position detection device are grating rulers. The grating ruler includes a grating ruler strip as a scale reference and a grating reading head as a reading unit. In one specific embodiment, the grating ruler strip is fixed to the first lifting platform 211 and the second lifting platform, and the grating reading head is fixed to the base 100 or a relatively fixed component. The two components interfere or diffraction fringes with relative movement, and the reading head converts this change into an electrical signal, thereby obtaining the corresponding displacement information. In another embodiment, the grating reading head can also be fixed to the first lifting platform 211 and the second lifting platform, while the grating ruler strip is fixed to the base 100 or a relatively fixed component. The grating ruler features high resolution, good repeatability, and strong anti-interference capability, making it particularly suitable for high-precision attitude adjustment applications. It can provide high-precision position signals to the control unit, enabling the control unit to calculate real-time differential displacement based on measurement data and perform coordinated control accordingly during closed-loop control. In other embodiments, the position detection device may also employ other measuring devices such as magnetic scales, laser interferometers, and inductive linear displacement sensors, as long as they can achieve high-precision real-time detection of the position of the lifting platform.

[0036] Please see Figures 1 to 3 In one embodiment of the present invention, the support platform 300 is used to install and fix the optical lens box 500, and is the direct support component for the object to be adjusted by the attitude adjustment device. The support platform 300 can be a plate structure, preferably made of marble, to ensure minimal shape change of the platform under environmental temperature changes or long-term loading, thereby avoiding affecting the optical alignment of the optical lens box 500. The upper surface of the support platform 300 is provided with mounting holes or positioning structures that match the installation of the optical lens box 500, and the optical lens box 500 can be reliably fixed to the support platform 300 by bolt connection, positioning pin engagement, or special clamps. The bottom or side surface of the support platform 300 is provided with mounting surfaces that cooperate with the first flexible support element and the second flexible support element. The connection between the support platform 300 and the flexible support element can be made by screw connection, pin connection, etc., to ensure the rigidity and reliability of the connection. The size and shape of the support platform 300 can be optimized according to the specific size and weight of the optical lens box 500 it supports, so that it has good modal characteristics and vibration resistance during pitch adjustment, thereby ensuring the imaging stability of the optical lens box 500 during the adjustment process.

[0037] Please see Figures 1 to 3In one embodiment of the present invention, a differential protection component 400 is installed on the sides of two sets of lifting units, for example, on one or both sides, and includes a triggering part 410 and a sensing part 420. The triggering part 410 is fixedly connected to one lifting unit, and the sensing part 420 is fixedly connected to the other lifting unit and arranged opposite to the sensing part 420. The relative position between the two directly reflects the relative displacement between the first lifting unit 210 and the second lifting unit 220. The sensing part 420 includes at least one position sensor, which can be a contact limit switch, a travel switch, or a non-contact photoelectric sensor, a magnetic induction sensor, etc. The triggering part 410 includes a triggering element for cooperating with the position sensor, such as a scanning arm 412, a trigger block, or a blocking plate. During system operation, when the relative displacement between the two lifting units is within the normal operating range, the trigger unit 410 and the sensing unit 420 remain in an untriggered state or in a stable triggered state. When the displacement difference between the two lifting units gradually increases and reaches a preset threshold, the trigger element will contact or disengage from the position sensor, causing a change in the sensor's output state. The differential protection component 400 generates a protection signal accordingly and sends this protection signal as a stop signal to the control unit or directly to the power supply circuit of the drive unit. Since the differential protection component 400 directly detects the relative displacement between the two lifting units, its operation does not depend on the position detection device and its control algorithm. When these systems malfunction, it can still independently complete the monitoring and protection of differential over-limits, thus forming a redundant safety link in the structural system that runs parallel to the closed-loop control system. Moreover, its triggering mechanism is simple, direct, and reliable, with almost no response delay, achieving pure hardware passive protection and significantly improving the safety and fault tolerance of the entire attitude adjustment device.

[0038] Please see Figures 1 to 3In one embodiment of the present invention, the position sensor includes a first limit switch 421 and a second limit switch 422, the sensing part 420 further includes a limit switch fixing member 423, and the triggering member includes a scanning arm fixing member 411 and a scanning arm 412. The scanning arm 412 can be a plate-shaped or strip-shaped rigid component, with one end fixed to a lifting unit, for example, it can be welded to the scanning arm fixing member 411. The scanning arm fixing member 411 is fixed to the first lifting platform 211 by screws. The other end of the scanning arm 412 extends into the working area of ​​the limit switch. The limit switch fixing member 423 is fixed to another lifting unit, for example, it is fixed to the second lifting platform by bolts. The limit switch fixing member 423 is provided with a limit switch mounting surface and / or guide groove for installing and adjusting the position of the first limit switch 421 and the second limit switch 422. The first limit switch 421 is mounted on the limit switch fixing member 423 through the first limit switch mounting plate 424, and the second limit switch 422 is mounted on the limit switch fixing member 423 through the second limit switch mounting plate 425. When the displacement difference between the first lifting unit 210 and the second lifting unit 220 is within a predetermined range, the free end of the scanning arm 412 is located between the two limit switches and does not contact any limit switch; when the displacement difference between the two lifting units exceeds the predetermined range and deviates to one side, the free end of the scanning arm 412 contacts the first limit switch 421, thereby triggering the first limit switch 421; when the displacement difference between the two lifting units deviates to the other side beyond the limit, the free end of the scanning arm 412 contacts the second limit switch 422, triggering the second limit switch 422; after the limit switch is triggered, on the one hand, its output signal can be directly connected to the enable circuit of the drive motor or the emergency stop input port of the control unit to forcibly cut off the motor power or brake it (hardware protection path), on the other hand, it can immediately notify the control unit, and the control unit will then execute the emergency stop procedure (software protection path), forming a double insurance to ensure that the lifting platform stops immediately, thereby protecting the flexible hinge 217 from overload plastic deformation. The first limit switch 421 and the second limit switch 422 correspond to the positive and reverse over-limit of the differential displacement, respectively, realizing the monitoring and protection of two different misalignment directions, and preventing damage to the flexible support element and the bearing platform 300 caused by excessive relative displacement of the two lifting units in any direction. It can be understood that the threshold is set based on the maximum allowable bending angle of the flexible hinge 217 used, which is converted into the maximum allowable height difference of the lifting platform through geometric calculation. Since there is a definite geometric relationship between the contact position between the scanning arm 412 and the limit switch and the relative displacement between the two lifting units, the preset threshold can be accurately set near the elastic working range of the flexible support element by fine-tuning the installation position of the limit switch during the assembly stage. This ensures that the differential protection does not affect the normal pitch adjustment and can intervene in time before exceeding the safe working range.

[0039] Please see Figures 1 to 3In one embodiment of the present invention, the installation positions of the first limit switch 421 and the second limit switch 422 are adjustable to set different preset thresholds. Specifically, the limit switch fixing member 423 can be provided with an elongated hole or guide rail extending along the relative displacement direction, and the first limit switch 421 and the second limit switch 422 are mounted on the elongated hole or guide rail with locking screws and mounting plates. During assembly and debugging, the position of the limit switch can be finely adjusted along the elongated hole direction by loosening the fasteners according to the size of the bearing platform 300, the elastic characteristics of the flexible support element, and the desired maximum allowable differential displacement. At the same time, the actual displacement difference between the two lifting units when the scanning arm 412 contacts the limit switch is observed by measurement or trial operation. After the target threshold is reached, the fasteners are locked to fix the position. Through the adjustable installation structure, one device can adapt to the needs of different optical lens boxes 500, different flexible support configurations, and different operating conditions in actual applications. The differential protection threshold can be recalibrated simply by adjusting the installation position of the limit switch without replacing the hardware, thus realizing the high configurability and versatility of the differential protection function.

[0040] Please see Figures 1 to 3In one embodiment of the present invention, the control unit is configured to: receive position signals from the first position detection device 214 and the second position detection device, and control the first drive unit 213 and the second drive unit to adjust the lifting and pitching attitude of the support platform 300; simultaneously, receive a stop signal from the differential protection component 400, and execute an emergency stop or motion prohibition action according to the stop signal. The control unit can be an integrated motion controller, PLC (programmable logic controller), or industrial computer, etc., and internally includes a processor, memory, input / output interface, and drive modules for driving servo motors or stepper motors. On the one hand, the control unit collects the position signals from the first position detection device 214 and the second position detection device in real time, calculates the actual height of the two lifting units and the resulting pitch angle of the support platform 300, and generates control commands for the first drive unit 213 and the second drive unit respectively according to a preset control algorithm to realize synchronous lifting or fine pitch adjustment of the support platform 300. On the other hand, the control unit can also monitor the limit switch signals output by the differential protection component 400. When it detects that either limit switch changes from an untriggered state to a triggered state, it immediately interrupts the current motion control task, sends an emergency stop signal to the first drive unit 213 and the second drive unit, and, if necessary, simultaneously cuts off the drive power or triggers the braking mechanism, so that the two lifting units stop moving in the shortest possible time. The control unit can also record the readings of the two position detection devices when the limit is triggered, for subsequent fault analysis and differential threshold adjustment, thus forming a closed-loop safety calibration process. The control unit can also be equipped with a human-machine interface for status monitoring, parameter setting, and manual operation. Through the combination of the differential protection component 400 and the control unit, effective coupling between conventional closed-loop position control and redundant hardware protection logic is achieved. In daily operation, position detection and closed-loop control ensure high-precision adjustment, while in abnormal operating conditions, the differential protection signal can still lead the emergency stop, achieving precise control while ensuring reliable safety protection.

[0041] Please see Figures 1 to 3In one embodiment of the present invention, after the optical lens box 500 is installed on the support platform 300, the control unit can first perform origin reset or position calibration on the two lifting units according to the initial readings of the first position detection device 214 and the second position detection device, so that the support platform 300 is in a predetermined initial posture, and check whether the differential protection component 400 is in an untriggered state, so as to ensure that the relative displacement of the two lifting units is within a safe range in the initial state. During optical debugging or operation, when it is necessary to adjust the height of the optical lens box 500, the target height and pitch angle can be input through the control unit. The control unit sends synchronous motion commands to the first drive unit 213 and the second drive unit, so that the two lifting units lift and lower with the same target displacement and speed. During this process, the flexible support element only bears symmetrical tension or slight bending, and the entire bearing platform 300 performs approximately translational movement. When pitch attitude adjustment is required, the control unit calculates the target height difference between the two lifting units according to the required pitch angle, and uses a differential control strategy to make one side of the lifting unit produce a set differential displacement relative to the other side. During this process, the flexible support element undergoes controllable bending deformation. The two work together to make the bearing platform 300 rotate at a small angle around the predetermined pitch center, and the optical axis direction of the optical lens box 500 is precisely adjusted accordingly. Throughout the adjustment process, the scanning arm 412 of the differential protection component 400 moves between the limit switches, continuously monitoring the actual relative displacement between the two lifting units. Once the actual differential displacement exceeds a preset threshold, the scanning arm 412 contacts the first limit switch 421 or the second limit switch 422 and triggers a protection signal, directly cutting off the motor. Simultaneously, it immediately notifies the control unit, which then executes an emergency stop procedure, forming a double safety net to ensure the lifting platform stops immediately. This protects the flexible hinge 217 from overload plastic deformation and prevents damage to the load-bearing platform 300 and the optical lens box 500 due to excessive attitude deflection. The entire system achieves a balance between high-precision adjustment and high-reliability protection.

[0042] In summary, the attitude adjustment device for the optical lens box of this invention, through a two-point adjustment architecture employing dual lifting units and flexible support elements, simplifies the structure and reduces costs while meeting the requirements for precise lifting and pitch adjustment. By setting up a hardware differential protection component 400 independent of the main control system, it directly monitors the relative displacement of the two drive chains, resulting in fast response and high reliability. This fundamentally eliminates the risk of damage to the core component (flexible hinge 217) due to soft faults in the control system. The hardware protection and software control work together to form a redundant safety system, greatly improving the reliability and safety of the device in long-term application. Furthermore, the differential protection component 400 is adjustable, highly flexible, and has good versatility. Using stable materials such as marble as the base components, combined with a high-rigidity mechanical design, ensures long-term stability of the adjustment accuracy. Through overall design, this invention achieves significant comprehensive performance improvements in pitch adjustment accuracy, long-term operational stability, and safety under abnormal operating conditions.

[0043] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

[0044] Throughout this description, numerous specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention may be practiced without one or more of these specific details or by other devices, systems, components, methods, parts, materials, components, etc. In other instances, well-known structures, materials, or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0045] Throughout this specification, the terms "an embodiment," "embodiment," or "specific embodiment" refer to a particular feature, structure, or characteristic described in connection with an embodiment that is included in at least one embodiment of the invention, but not necessarily in all embodiments. Therefore, the various representations of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout the specification do not necessarily refer to the same embodiment. Furthermore, a particular feature, structure, or characteristic of any specific embodiment of the invention can be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be based on the teachings herein and will be considered part of the spirit and scope of the invention.

[0046] It should also be understood that one or more of the elements shown in the figures may be implemented in a more separate or more integrated manner, or may even be removed because they are inoperable in certain circumstances or provided because they may be useful for a particular application.

[0047] Furthermore, unless otherwise expressly stated, any arrows in the accompanying drawings should be considered illustrative only and not limiting. Additionally, unless otherwise stated, the term "or" as used herein is generally intended to mean "and / or". Where a term is anticipated to provide a separation or combination capability that is unclear, a combination of components or steps will also be considered as indicated.

[0048] As used herein and throughout the claims below, unless otherwise specified, “a” and “the” include the plural references. Similarly, as used herein and throughout the claims below, unless otherwise specified, “in” means “in” and “on”.

[0049] The above description of the embodiments shown in this invention (including the content set forth in the abstract of the specification) is not intended to be an exhaustive enumeration or to limit the invention to the precise forms disclosed herein. Although specific embodiments and examples of the invention have been described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the invention, as will be recognized and understood by those skilled in the art. As indicated, these modifications can be made to the invention in accordance with the above description of the embodiments described herein, and such modifications will be within the spirit and scope of the invention.

[0050] This document has generally described the systems and methods in detail to aid in understanding the invention. Furthermore, various specific details have been set forth to provide a general understanding of embodiments of the invention. However, those skilled in the art will recognize that embodiments of the invention can be practiced without one or more specific details, or using other means, systems, accessories, methods, components, materials, parts, etc. In other instances, well-known structures, materials, and / or operations have not been specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

[0051] Therefore, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the foregoing disclosure, and it should be understood that in some cases, certain features of the invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terminology used in the following claims and / or the specific embodiments disclosed as the best mode for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the invention will be defined only by the appended claims.

Claims

1. An attitude adjustment device for an optical mirror box, characterized in that, include: A support platform for mounting optical lens cases; An adjustment assembly includes a first lifting unit and a second lifting unit, which are disposed opposite to each other on both sides of the bearing platform. The first lifting unit and the second lifting unit are respectively provided with a first flexible support element and a second flexible support element at the end of the first lifting unit and the second lifting unit near the bearing platform. The first flexible support element and the second flexible support element are connected to and support the bearing platform, and are used to realize the pitch adjustment of the bearing platform when there is a differential displacement between the first lifting unit and the second lifting unit. A differential protection component is provided, with one end connected to the first lifting unit and the other end connected to the second lifting unit. The differential protection component is configured to monitor the relative displacement between the first lifting unit and the second lifting unit in real time, and to trigger a protection signal when the relative displacement reaches a preset threshold.

2. The attitude adjustment device for the optical lens box according to claim 1, characterized in that, It also includes a base, on which the first lifting unit and the second lifting unit are mounted.

3. The attitude adjustment device for the optical mirror box according to claim 2, characterized in that, The first lifting unit includes: The first lifting platform is slidably connected to the base via a first transmission part and connected to the bearing platform via a first flexible support element. The first drive unit drives the first lifting platform to slide along the first direction; A first position detection device is disposed on the base and / or the first lifting platform for detecting the position of the first lifting platform.

4. The attitude adjustment device for the optical lens box according to claim 3, characterized in that, The second lifting unit includes: The second lifting platform is slidably connected to the base via a second transmission part and connected to the bearing platform via a second flexible support element. The second drive unit drives the second transmission unit to slide along the first direction; A second position detection device is disposed on the base and / or the second lifting platform for detecting the position of the second lifting platform.

5. The attitude adjustment device for the optical lens box according to claim 1, characterized in that, The first flexible support element and the second flexible support element are flexible hinges.

6. The attitude adjustment device for the optical lens box according to claim 4, characterized in that, The first position detection device and / or the second position detection device are optical grating rulers.

7. The attitude adjustment device for the optical mirror box according to claim 4, characterized in that, The differential protection component includes a triggering part and a sensing part. The triggering part is fixedly connected to a lifting unit, and the sensing part is fixedly connected to another lifting unit and is arranged opposite to the triggering part. The sensing unit includes at least one position sensor, and the triggering unit includes a triggering element for cooperating with the position sensor. When the displacement difference between the first lifting unit and the second lifting unit reaches the preset threshold, the triggering unit comes into contact with or disengages from the sensing unit, thereby triggering the protection signal.

8. The attitude adjustment device for the optical lens box according to claim 7, characterized in that, The position sensor includes a first limit switch and a second limit switch, and the trigger is a scanning arm; The scanning arm is fixed to a lifting unit, and the limit switch fixing component is fixed to another lifting unit. The limit switch is installed on the limit switch fixing component. When the displacement difference between the first lifting unit and the second lifting unit exceeds a predetermined range, the scanning arm contacts the first limit switch or the second limit switch, thereby issuing a stop signal.

9. The attitude adjustment device for the optical lens box according to claim 8, characterized in that, The installation positions of the first limit switch and the second limit switch are adjustable to set different preset thresholds.

10. The attitude adjustment device for the optical lens box according to claim 8, characterized in that, It also includes a control unit, which is configured to receive position signals from the first position detection device and the second position detection device, and control the first drive unit and the second drive unit to adjust the lifting and pitching attitude of the carrier platform; Receive a stop signal from the differential protection component and perform an emergency stop action according to the stop signal.

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