Optical platform rigidity detection device and method

Abstract

This invention relates to an optical platform stiffness testing device and method, belonging to the field of stiffness testing technology. It includes a main body with a fixed crossbeam at its top. Movable crossbeams are slidably connected to both sides of the fixed crossbeam. A fixed base is fixed to the bottom of each movable crossbeam. A dial indicator is fixed to one side of the support base. A buffer assembly is installed inside a sliding member. An adjustment assembly is installed between the sliding member and the movable crossbeam. A support assembly is installed inside the movable crossbeam. This invention uses a rack and pinion transmission to convert the linear extension and retraction motion of the movable crossbeam into the rotational motion of a rotating plate. The rotation of the rotating plate then pulls the plate, causing the movable base to slide synchronously in both directions. This achieves the linkage between the extension and retraction of the movable crossbeam and the synchronous movement of the support base, preventing the dial indicator from misinterpreting the deformation of the movable and fixed crossbeams as the stress deformation of the optical platform, eliminating system measurement errors, and ensuring that the deflection data collected by the dial indicator is the true deformation of the platform.

Description

Technical Field

[0001] This invention relates to the field of stiffness testing technology, specifically to an optical platform stiffness testing device and method. Background Technology

[0002] Digital dial indicators are based on intelligent sensors such as grating displacement sensors. By moving the measuring rod, the displacement changes of the capacitive grating and optical grating are converted into digital values, which are directly displayed on the screen. They are used in the testing of optical platforms and can effectively improve the testing accuracy. Optical platforms are widely used in precision optical experiments, laser measurement, precision machining, optoelectronic instrument assembly and other fields. The structural stiffness, deformation resistance and elastic rebound performance of the platform directly affect the stability of the optical path and the working accuracy of precision equipment. The structural stiffness of the optical platform is a key indicator for measuring its comprehensive performance. The deflection deformation, bending resistance and elastic rebound performance of the platform after loading directly determine the stability of the optical path and the measurement accuracy of precision instruments. Therefore, accurate and standardized stiffness testing of optical platforms is a necessary part of product quality inspection and performance calibration. Currently, the industry uses a simple and traditional testing method for the stiffness testing of optical platforms. This method mainly consists of a fixed crossbeam, a simple support base, standard weights, and a digital dial indicator. The load is applied by manually stacking weights in the center of the platform, and the deflection value of the platform is read manually using the digital dial indicator to roughly determine the stiffness of the platform. However, in existing optical platform stiffness testing devices, the crossbeam of the measuring mechanism and the dial indicator are rigidly connected. The instantaneous impact when the weight is applied and the elastic rebound vibration of the platform after being loaded are transmitted to the detection crossbeam through the optical platform, causing high-frequency vibration. The gears and measuring rods inside the dial indicator are precision components, and high-frequency vibration will cause the pointer to jump violently, or even directly mask the tiny static deflection signal, making it impossible to obtain stable data. Moreover, most of the existing crossbeams are fixed crossbeams with fixed support spacing, which can only be adapted to optical platforms of a single size. After the length of the crossbeam changes, its own weight will cause bending deformation, which will be misinterpreted by the dial indicator as platform deflection, resulting in serious distortion of the measurement results.

[0003] To address the aforementioned issues, there is an urgent need for innovative designs based on existing optical platform stiffness testing devices and methods. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide an optical platform stiffness detection device and method to solve the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an optical platform stiffness detection device and method, comprising a main body, a support at the top of the main body, multiple weights placed at the top of the support, a fixed crossbeam at the top of the main body, movable seats symmetrically arranged at the bottom of the fixed crossbeam, movable crossbeams slidably connected to both sides of the fixed crossbeam, a fixed seat fixed at the bottom of the movable crossbeam, grooves formed at the top of both the fixed and movable crossbeams, a sliding member slidably connected to the top of the fixed and movable crossbeams, a support seat at the top of the sliding member, a dial indicator fixed to one side of the support seat, a buffer component inside the sliding member to reduce vibration that may occur during the movement of the sliding member, an adjustment component between the sliding member and the movable crossbeam to adjust the height difference between the grooves of the fixed and movable crossbeams, and a support component inside the movable crossbeam to adjust the support position of the movable seat.

[0006] Preferably, the buffer assembly includes a fixed plate fixed to the bottom of the support base, pressure plates are movably connected to both sides of the fixed plate, a rotating frame is rotatably connected to a protruding position on one side of the pressure plate, a connecting plate is rotatably connected to one side of the rotating frame, a moving part is rotatably connected to the connecting plate, and a sleeve is slidably connected to the moving part.

[0007] Preferably, a spring is provided between the two rotating frames, the sleeve has a cavity that cooperates with the moving part, and a spring is provided between the sleeve and the moving part.

[0008] Preferably, the sliding member has a cavity that moves to cooperate with the fixed plate and the pressure plate, and the sleeve and the sliding member are rotatably connected at the protruding position of the cavity.

[0009] Preferably, the adjustment assembly includes a guide block fixed to the bottom end of the sliding member, a telescopic rod fixed to the bottom end of the guide block, a movable plate fixed to the bottom end of the telescopic rod, arc-shaped edges on both sides of the bottom end of the telescopic rod, and an arc-shaped edge at the connection between the fixed crossbeam and the movable crossbeam.

[0010] Preferably, the support assembly includes a rack disposed at the bottom end of the moving crossbeam, a gear meshing between the two racks, a rotating plate connected to the gear via a connecting shaft, a pull plate symmetrically rotatably connected to the bottom end of the rotating plate, the pull plate being rotatably connected to the movable seat, a fixed frame fixed to one side of the fixed crossbeam, a limit block movably connected to the fixed frame, and a slide rail slidably connected to the limit block.

[0011] Preferably, the fixed crossbeam has a cavity that moves to cooperate with the movable crossbeam, rack, and rotating plate; the gear is fixedly connected to the inner wall of the cavity via a connecting shaft; and the movable crossbeam has a cavity that moves to cooperate with the movable seat.

[0012] Preferably, the fixed frame has a cavity that moves to cooperate with the limiting block, a spring is provided between the fixed frame and the limiting block, the slide rail has an arc-shaped groove that engages with the limiting block, and the slide rail is fixedly connected to the moving crossbeam.

[0013] A method for using an optical platform stiffness testing device includes the following steps: S1: Clean the contact surface of debris, fix the fixed crossbeam to the top of the main body, pull the crossbeam, and drive the moving seat to move synchronously through the linkage of rack, gear and other linkages, adjust the support spacing, adapt to the size of the optical platform, and avoid the crossbeam's own deformation from interfering with the detection. S2: When the moving crossbeam slides, the fixed frame moves synchronously. The limit block is squeezed and contracted by the plane section of the slide rail and popped out and locked at the arc groove to prevent the moving crossbeam from sliding and ensure the stability of the reference. S3: The sliding component drives the dial indicator to adjust its position. The curved edge of the moving plate, together with the telescopic rod, compensates for the height difference of the slide groove. The buffer structure absorbs vibration, prevents the dial indicator pointer from jumping, and ensures that the probe is vertical. S4: After zeroing the dial indicator, place weights in stages. After each stage of loading and allowing it to stabilize, record the deflection data. When unloading, collect the platform rebound data simultaneously to complete the test.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses rack and pinion transmission to convert the linear extension and retraction of the moving crossbeam into the rotational motion of the rotating plate. The rotation of the rotating plate then pulls the plate, causing the moving seat to slide synchronously in both directions. This achieves the linkage between the extension and retraction of the moving crossbeam and the synchronous movement of the support seat. At the same time, the fixed seat moves synchronously at the bottom of the fixed crossbeam, ensuring that both ends of the moving crossbeam are always supported. This prevents the deformation of the moving and fixed crossbeams from being misinterpreted by the dial indicator as the deformation of the optical platform, eliminates system measurement errors, and ensures that the deflection data collected by the dial indicator is the true deformation of the platform. This significantly improves the detection accuracy and can cover the detection needs of optical platforms with different lengths and widths. It eliminates the need to customize special crossbeams for different platform specifications, reducing equipment investment.

[0015] 2. This invention constructs a vibration isolation system through a two-way composite structure of preloaded spring to eliminate gaps, horizontal spring for horizontal vibration reduction, and sleeve spring for vertical buffering. This system avoids secondary collisions and impacts caused by the gap between the sliding part and the support seat during loaded vibration, preventing the impact from being transmitted to the dial indicator, avoiding pointer jumps, and ensuring stable readings. The horizontal spring absorbs horizontal vibrations, and the sleeve spring absorbs vertical vibrations through a linkage structure. This double buffering achieves omnidirectional vibration isolation, reducing wear and loosening of dial indicator components, preventing damage to the meter head, ensuring long-term stability of the dial indicator's measurement accuracy, and reducing equipment maintenance and replacement costs.

[0016] 3. This invention utilizes the elastic extension and contraction characteristics of the preloaded spring to achieve automatic avoidance and automatic locking of the limit block. When the moving crossbeam slides, the limit block is squeezed by the slide rail plane section, and the compressed spring retracts into the fixed frame, achieving unobstructed sliding. After adjustment, the limit block aligns with the arc-shaped groove, and the spring resets, pushing the limit block into the arc-shaped groove, achieving rigid locking between the moving crossbeam and the fixed crossbeam. This avoids the moving crossbeam from retracting or slipping due to factors such as weight loading vibration and the device's own weight during the testing process, ensuring that the support spacing and measurement benchmark remain constant, avoiding measurement data distortion caused by benchmark drift, and ensuring the repeatability and consistency of data during batch testing. The guiding effect of the arc-shaped edge, combined with the elastic extension and contraction of the telescopic rod, compensates for the height difference between the fixed crossbeam and the moving crossbeam slide rail. The arc-shaped edge transition avoids the jamming caused by the step-like height difference, and the extension and contraction of the telescopic rod can adaptively compensate for the height difference, achieving unobstructed sliding of the sliding component throughout its entire range. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a structural diagram showing the connection between the main body of the invention and the dial indicator; Figure 3 This is a structural schematic diagram showing the connection between the fixed crossbeam and the movable crossbeam of the present invention; Figure 4 This is a three-dimensional structural diagram of the buffer component of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of the buffer component from another perspective of the present invention; Figure 6 This is a three-dimensional schematic diagram of the buffer component of the present invention. Figure 7 This is a partial three-dimensional structural diagram of the support component of the present invention; Figure 8 This is a structural schematic diagram showing the connection between the pull plate and the movable seat of the present invention; Figure 9 This is a structural schematic diagram showing the connection between the fixed crossbeam and the slide rail in this invention; Figure 10 This is a schematic diagram showing the connection between the limiting block and the slide rail in this invention.

[0018] In the diagram: 1. Main body; 2. Bracket; 3. Weight; 4. Fixed crossbeam; 5. Sliding component; 6. Support base; 7. Dial indicator; 801. Fixed plate; 802. Pressure plate; 803. Rotating frame; 804. Connecting plate; 805. Moving component; 806. Sleeve; 901. Guide block; 902. Telescopic rod; 903. Moving plate; 10. Moving crossbeam; 111. Rack; 112. Gear; 113. Rotating plate; 114. Pull plate; 115. Fixed frame; 116. Limiting block; 117. Slide rail; 12. Moving base; 13. Fixed base. Detailed Implementation

[0019] Please see Figures 1 to 10 This invention provides a technical solution: an optical platform stiffness detection device and method, comprising a main body 1, a support 2 at the top of the main body 1, multiple weights 3 placed at the top of the support 2, a fixed crossbeam 4 at the top of the main body 1, movable seats 12 symmetrically arranged at the bottom of the fixed crossbeam 4, movable crossbeams 10 slidably connected to both sides of the fixed crossbeam 4, fixed seats 13 fixed at the bottom of the movable crossbeams 10, grooves opened at the top of both the fixed crossbeam 4 and the movable crossbeams 10, sliding members 5 slidably connected to the top of the fixed crossbeam 4 and the movable crossbeams 10, a support seat 6 at the top of the sliding member 5, a dial indicator 7 fixed on one side of the support seat 6, a buffer component inside the sliding member 5 to reduce vibration that may occur during the movement of the sliding member 5, an adjustment component between the sliding member 5 and the movable crossbeams 10 to adjust the height difference between the grooves of the fixed crossbeam 4 and the movable crossbeams 10, and a support component inside the movable crossbeams 10 to adjust the support position of the movable seats 12.

[0020] In the specific implementation, the main body 1 serves as the installation foundation, the bracket 2 carries the weight 3 to achieve loading, the fixed crossbeam 4 cooperates with the moving crossbeam 10, the support component adjusts the position of the moving seat 12, the fixed seat 13 provides auxiliary support, the sliding component 5 drives the dial indicator 7 on the support seat 6 to detect, the adjustment component compensates for the height difference of the slide, the buffer component reduces vibration, and thus completes the platform stiffness test.

[0021] As a further embodiment of the present invention, the buffer assembly includes a fixed plate 801 fixed to the bottom of the support base 6. Both sides of the fixed plate 801 are movably connected to pressure plates 802. A rotating frame 803 is rotatably connected to a protruding position on one side of the pressure plate 802. A connecting plate 804 is rotatably connected to one side of the rotating frame 803. A moving part 805 is rotatably connected to the connecting plate 804. A sleeve 806 is slidably connected to the moving part 805.

[0022] In practice, the fixed plate 801 at the bottom of the support base 6 is movablely engaged with the pressure plates 802 on both sides. The pressure plates 802 are hinged to drive the rotating frame 803 to swing. The rotating frame 803 is linked to the moving part 805 through the connecting plate 804, so that the moving part 805 slides within the sleeve 806. By relying on the hinged transmission and sliding engagement of each component, vibration buffering and vibration absorption are achieved, reducing the interference of horizontal and vertical swaying on the detection component.

[0023] As a further embodiment of the present invention, a spring is provided between the two rotating frames 803, and a cavity is provided in the sleeve 806 to cooperate with the movable member 805. A spring is provided between the sleeve 806 and the movable member 805.

[0024] In practice, when the device vibrates horizontally and vertically, the spring between the two rotating frames 803 can absorb the horizontal vibration energy; the sleeve 806 has a cavity inside for the movable part 805 to move, and the spring between the sleeve 806 and the movable part 805, together with the sliding of the movable part 805 in the cavity, realizes the vertical vibration buffering. The double springs work together to play the role of overall vibration reduction and buffering.

[0025] As a further embodiment of the present invention, the sliding member 5 has a cavity that moves in conjunction with the fixed plate 801 and the pressure plate 802, and the sleeve 806 is rotatably connected to the protruding position of the inner wall of the cavity of the sliding member 5.

[0026] In specific implementation, the sliding member 5 has a cavity inside, which allows the fixed plate 801 and the pressure plate 802 to move flexibly and avoid each other within the cavity. At the same time, the sleeve 806 is rotatably connected to the protruding position on the inner wall of the cavity of the sliding member 5, realizing the overall hinged assembly of the buffer assembly, ensuring smooth linkage movement of each component, and providing structural support for subsequent vibration reduction and buffering.

[0027] As a further embodiment of the present invention, the adjustment component includes a guide block 901 fixed to the bottom end of the sliding member 5, a telescopic rod 902 fixed to the bottom end of the guide block 901, a movable plate 903 fixed to the bottom end of the telescopic rod 902, and arc-shaped edges on both sides of the bottom end of the telescopic rod 902. The connection between the fixed crossbeam 4 and the movable crossbeam 10 is also an arc-shaped edge.

[0028] In specific implementation, the sliding member 5 has a cavity inside, which can accommodate and adapt the fixed plate 801 and the pressure plate 802 to move freely in the cavity. At the same time, the sleeve 806 is rotatably installed on the protruding position on the inner wall of the cavity of the sliding member 5, so that the sleeve 806 can flexibly deflect with vibration, and cooperate with the overall buffer structure to complete the vibration reduction function.

[0029] As a further embodiment of the present invention, the support assembly includes a rack 111 disposed at the bottom end of the movable crossbeam 10, a gear 112 meshing between the two racks 111, a rotating plate 113 connected to the gear 112 via a connecting shaft, a pull plate 114 symmetrically rotatably connected to the bottom end of the rotating plate 113, the pull plate 114 being rotatably connected to the movable seat 12, a fixed frame 115 fixed on one side of the fixed crossbeam 4, a limit block 116 movably connected to the fixed frame 115, and a slide rail 117 slidably connected to the limit block 116.

[0030] In specific implementation, the rack 111 at the bottom of the moving crossbeam 10 meshes with the gear 112. The gear 112 drives the rotating plate 113 to rotate through the connecting shaft. The rotating plate 113 pulls the pull plate 114 to move and drives the moving seat 12 to adjust the support position. The fixed frame 115 on one side of the fixed crossbeam 4 moves the limiting block 116 to limit its movement. The limiting block 116 slides along the slide rail 117, thereby realizing the guidance and positioning locking of the moving crossbeam 10 during the extension and retraction process.

[0031] As a further embodiment of the present invention, the fixed crossbeam 4 has a cavity that moves in conjunction with the movable crossbeam 10, the rack 111 and the rotating plate 113, and the gear 112 is fixedly connected to the inner wall of the cavity through a connecting shaft. The movable crossbeam 10 has a cavity that moves in conjunction with the movable seat 12.

[0032] In practice, the fixed crossbeam 4 has a cavity inside, which allows the movable crossbeam 10, rack 111 and rotating plate 113 to move flexibly inside. The gear 112 is fixedly installed on the inner wall of the cavity of the fixed crossbeam 4 through a connecting shaft. At the same time, the movable crossbeam 10 also has a cavity, which provides space for the sliding adjustment of the movable seat 12 and limits its movement.

[0033] As a further embodiment of the present invention, the fixed frame 115 has a cavity that moves in conjunction with the limiting block 116, a spring is provided between the fixed frame 115 and the limiting block 116, the slide rail 117 has an arc-shaped groove that engages with the limiting block 116, and the slide rail 117 is fixedly connected to the moving crossbeam 10.

[0034] In specific implementation, the fixed frame 115 has a cavity inside which the limiting block 116 can extend and retract. A spring is installed between the fixed frame 115 and the limiting block 116. The slide rail 117, which is fixedly connected to the moving crossbeam 10, has an arc-shaped groove. The limiting block 116 can slide and retract by the spring force and can engage with the arc-shaped groove of the slide rail 117, thereby realizing the sliding guidance and position locking of the moving crossbeam 10.

[0035] A method for using an optical platform stiffness testing device includes the following steps: S1: Clean the debris from the contact surface, fix the fixed crossbeam 4 to the top of the main body 1, pull the crossbeam 10, and drive the moving seat 12 to move synchronously through the linkage of rack 111, gear 112 and other linkages, adjust the support spacing, adapt to the size of the optical platform, and avoid the crossbeam's own deformation from interfering with the detection. S2: When the moving crossbeam 10 slides, the fixed frame 115 moves synchronously, and the limit block 116 is squeezed and contracted by the plane section of the slide rail 117 and popped out and locked at the arc groove to prevent the moving crossbeam 10 from sliding and to ensure the stability of the reference. S3: The sliding component 5 drives the dial indicator 7 to adjust its position. The arc-shaped edge of the moving plate 903, together with the telescopic rod 902, compensates for the height difference of the slide groove. The buffer structure absorbs vibration, prevents the pointer of the dial indicator 7 from jumping, and ensures that the probe is vertical. S4: After zeroing the dial indicator 7, place the weights 3 in stages. After each stage of loading and allowing it to stabilize, record the deflection data. When unloading, collect the platform rebound data simultaneously to complete the test.

[0036] Working principle: Before using this optical platform stiffness testing device and method, clean the optical platform surface and all contact surfaces of the device. Fix the fixed crossbeam 4 to the top of the main body 1. Adjust the nesting distance between the fixed crossbeam 4 and the movable crossbeam 10 according to the size of the optical platform being tested, thus matching the movable measuring range of the dial indicator 7. Manually pull the movable crossbeam 10 out from inside the fixed crossbeam 4. When the movable crossbeam 10 moves linearly (the fixed base 13 at the bottom of the movable crossbeam 10 moves synchronously), it synchronously drives the rack 111 fixed at its bottom to move along the guide groove. The rack 111 meshes with the gear 112, converting the linear motion into the rotational motion of the gear 112. The gear 112 synchronously drives the rotating plate 1 at the bottom through the connecting shaft. 13 rotates around the axis, and the two eccentric ends of the rotating plate 113 pull the pull plate 114 to make linear reciprocating motion. The other end of the pull plate 114 is hinged to the moving seat 12, which in turn drives the moving seat 12 to move synchronously in both directions along the guide groove at the bottom of the moving crossbeam 10, so as to realize the automatic adjustment of the support position. The support seat 6 moves synchronously with the extension and retraction of the moving crossbeam 10, so that the fixed crossbeam 4 and the moving crossbeam 10 are always in the stress state of simply supported beams supported at both ends, avoiding the formation of a cantilever structure in the extended section of the moving crossbeam 10, eliminating the bending deflection caused by the weight of the fixed crossbeam 4 and the moving crossbeam 10, avoiding it from being misjudged as platform deformation, ensuring the rigidity of the measurement reference, and the total length of the fixed crossbeam 4 and the moving crossbeam 10 and the support spacing can be flexibly adjusted according to the optical platform of different sizes, without the need to change special tooling; During the sliding process of the moving crossbeam 10 inside the fixed crossbeam 4, the fixed frame 115 fixed to the side wall of the moving crossbeam 10 slides synchronously along the slide rail 117. The fixed frame 115 is equipped with a limit block 116 through a pre-compression spring. When the limit block 116 slides in the plane section of the slide rail 117, the side wall of the slide rail 117 squeezes the limit block 116, so that it overcomes the spring force and is compressed into the fixed frame 115, realizing unobstructed sliding. When the moving crossbeam 10 is adjusted to the preset position, the limit block 116 moves to the arc groove position of the slide rail 117. The limit block 116 loses the side wall compression and pops out and embeds into the arc groove under the action of the spring force, realizing the position locking of the moving crossbeam 10 and the fixed crossbeam 4, avoiding the moving crossbeam 10 from retracting or sliding due to its own weight or loading vibration during the detection process, and ensuring the long-term stability of the support spacing and the measurement benchmark. The sliding member 5 is fixedly connected to the support base 6. The support base 6 is equipped with a dial indicator 7. The sliding member 5 can slide along the through groove opened on the fixed crossbeam 4 and the moving crossbeam 10, driving the dial indicator 7 to adjust the measurement position along the length of the crossbeam. There is a height difference between the grooves on the fixed crossbeam 4 and the moving crossbeam 10, and the transition of the groove adopts an arc edge design. The two sides of the moving plate 903 are also correspondingly provided with arc edges. When the sliding member 5 drives the moving plate 903 to slide from the lower groove of the moving crossbeam 10 to the higher groove of the fixed crossbeam 4, the arc edge of the moving plate 903 cooperates with the arc edge of the groove and is lifted by the side wall of the groove, which drives the telescopic rod 902 to be compressed, realizing adaptive compensation of the height difference. The telescopic compensation of the telescopic rod 902 ensures that the moving plate 903 is always in contact with the bottom surface of the groove, and the guide block 901 is always in a horizontal state, thereby driving the sliding member 5 to remain horizontal, so that the probe of the dial indicator 7 is always perpendicular to the platform surface, avoiding measurement errors caused by probe tilting. A fixing plate 801 is fixed to the bottom of the support base 6. The fixing plate 801 is clamped by two symmetrically arranged pressure plates 802. A rotating frame 803 is hinged to the outside of each pressure plate 802. The rotating frame 803 is hinged to a connecting plate 804. The other end of the connecting plate 804 is rotatably connected to a moving part 805. The moving part 805 is installed in a sleeve 806. A compression spring is built into the sleeve 806. One end of the spring is fixed to the bottom of the sleeve 806, and the other end is connected to the moving part 805. During installation, the spring is in a pre-compressed state. The pre-compressed state of the spring in the sleeve 806 applies a constant pre-pressure to the fixing plate 801, so that the pressure plate 802 and the fixing plate 801 fit together without gaps, avoiding gaps between the sliding part 5 and the support base 6. The secondary impact caused by the gap is mitigated when the sliding part 5 is subjected to loading vibration or shaking, resulting in a small horizontal displacement. The fixed plate 801 drives the pressure plate 802 on one side to move, so that the transverse spring between the rotating frame 803 absorbs the horizontal vibration energy. At the same time, the pressure plate 802 drives the connecting plate 804 to swing through the rotating frame 803, which in turn drives the moving part 805 to move in the sleeve 806, stretching or compressing the spring in the sleeve 806, thus achieving secondary buffering of vertical shaking. Through the horizontal and vertical bidirectional buffering structure, horizontal shaking and vertical vibration are isolated at the same time, so that the dial gauge 7 only responds to the static deflection displacement of the platform, which greatly reduces the requirements of the device on the detection environment and eliminates the need to build an additional vibration isolation table. After the device is set up and the dial indicator 7 is zeroed, standard weights 3 are placed at the top of the support 2 in stages to simulate the actual working load of the optical platform. After each level of weight 3 is loaded, the platform's elastic vibration is completely attenuated and the device is stable. The deflection value of the dial indicator 7 is then read and recorded. The weights 3 are added sequentially according to the preset load levels. The loading, resting, and reading process is repeated to collect deflection data under different loads. The operation can be reversed during unloading to simultaneously collect the platform's rebound deformation data.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are within the scope of the present invention.

Claims

1. An optical platform stiffness detection device, comprising a main body (1), characterized in that: The main body (1) is provided with a support (2) at the top, and multiple weights (3) are placed on the top of the support (2). The main body (1) is provided with a fixed crossbeam (4) at the top, and movable seats (12) are symmetrically provided at the bottom of the fixed crossbeam (4). Movable crossbeams (10) are slidably connected to both sides of the fixed crossbeam (4). Fixed seats (13) are fixed at the bottom of the movable crossbeams (10). Sliding grooves are provided at the top of both the fixed crossbeam (4) and the movable crossbeam (10). Sliding elements (5) are slidably connected to the top of the fixed crossbeam (4) and the movable crossbeam (10). (5) A support base (6) is provided at the top. A dial indicator (7) is fixed on one side of the support base (6). A buffer component is provided inside the sliding member (5), and the vibration phenomenon that may occur during the movement of the sliding member (5) is reduced by the buffer component. An adjustment component is provided between the sliding member (5) and the moving crossbeam (10), and the height difference between the fixed crossbeam (4) and the sliding crossbeam (10) is adjusted by the adjustment component. A support component is provided inside the moving crossbeam (10), and the support position of the moving seat (12) is adjusted by the support component.

2. The optical platform stiffness detection device according to claim 1, characterized in that: The buffer assembly includes a fixed plate (801) fixed to the bottom of the support base (6). Both sides of the fixed plate (801) are movably connected to pressure plates (802). A rotating frame (803) is rotatably connected to a protruding position on one side of the pressure plate (802). A connecting plate (804) is rotatably connected to one side of the rotating frame (803). A moving part (805) is rotatably connected to the connecting plate (804). A sleeve (806) is slidably connected to the moving part (805).

3. The optical platform stiffness detection device according to claim 2, characterized in that: A spring is provided between the two rotating frames (803), and the sleeve (806) has a cavity that cooperates with the moving part (805). A spring is provided between the sleeve (806) and the moving part (805).

4. The optical platform stiffness detection device according to claim 3, characterized in that: The sliding member (5) has a cavity that moves with the fixing plate (801) and the pressure plate (802), and the sleeve (806) and the sliding member (5) are rotatably connected at the protruding position of the cavity wall.

5. The optical platform stiffness detection device according to claim 4, characterized in that: The adjustment assembly includes a guide block (901) fixed to the bottom of the sliding member (5), a telescopic rod (902) fixed to the bottom of the guide block (901), a movable plate (903) fixed to the bottom of the telescopic rod (902), and arc-shaped edges on both sides of the bottom of the telescopic rod (902). The connection between the fixed crossbeam (4) and the movable crossbeam (10) is also an arc-shaped edge.

6. The optical platform stiffness detection device according to claim 5, characterized in that: The support assembly includes a rack (111) at the bottom of the moving crossbeam (10), a gear (112) meshing between the two racks (111), a rotating plate (113) connected to the gear (112) via a connecting shaft, a pull plate (114) symmetrically rotatably connected to the bottom of the rotating plate (113), the pull plate (114) rotatably connected to the moving seat (12), a fixed frame (115) fixed on one side of the fixed crossbeam (4), a limit block (116) movably connected to the fixed frame (115), and a slide rail (117) slidably connected to the limit block (116).

7. The optical platform stiffness detection device according to claim 6, characterized in that: The fixed crossbeam (4) has a cavity that moves in conjunction with the movable crossbeam (10), the rack (111) and the rotating plate (113). The gear (112) is fixedly connected to the inner wall of the cavity via a connecting shaft. The movable crossbeam (10) has a cavity that moves in conjunction with the movable seat (12).

8. The optical platform stiffness detection device according to claim 7, characterized in that: The fixed frame (115) has a cavity that moves in conjunction with the limiting block (116). A spring is provided between the fixed frame (115) and the limiting block (116). The slide rail (117) has an arc-shaped groove that engages with the limiting block (116). The slide rail (117) is fixedly connected to the moving crossbeam (10).

9. A method of using an optical platform stiffness testing device, applicable to the optical platform stiffness testing device according to any one of claims 1-8, the method comprising the following steps: S1: Clean the debris on the contact surface, fix the fixed crossbeam (4) to the top of the main body (1), pull the crossbeam (10), and drive the moving seat (12) to move synchronously through the linkage of rack (111), gear (112), etc., adjust the support spacing, adapt to the size of the optical platform, and avoid the crossbeam's own deformation from interfering with the detection. S2: When the moving crossbeam (10) slides, the fixed frame (115) moves synchronously, and the limit block (116) is squeezed and contracted by the plane section of the slide rail (117) and popped out and locked at the arc groove to prevent the moving crossbeam (10) from sliding and ensure the stability of the reference. S3: The sliding component (5) drives the dial indicator (7) to adjust its position. The arc edge of the moving plate (903) cooperates with the telescopic rod (902) to compensate for the height difference of the slide groove. The buffer structure absorbs vibration, avoids the pointer of the dial indicator (7) from jumping, and ensures that the probe is vertical. S4: After zeroing the dial indicator (7), place weights (3) in stages. Record the deflection data after each stage of loading and allowing it to stabilize. Collect the platform rebound data simultaneously during unloading to complete the test.

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