Protective devices for portable laser interferometers

Abstract

This application relates to the field of interferometer protection technology, specifically to a protective device suitable for portable laser interferometers. The protective device includes a housing, a heat dissipation device, and a fixing mechanism. The housing houses the target interferometer and is composed of multiple panels, with at least two panels having ventilation openings. A heat dissipation channel is formed between the ventilation openings on the two panels, and the target interferometer is positioned on the heat dissipation channel when placed inside the housing. The heat dissipation device is connected to the housing to control the temperature inside the housing within a desired range. The fixing mechanism is connected to the housing to adapt and fix the target interferometer according to its size. The target interferometer fixed inside the housing does not directly contact the inner wall of any panel. The protective device provided by this application enhances the protection of portable laser interferometers, extends their service life, and expands the range of sizes to which the protective device can be adapted to portable laser interferometers.

Description

Technical Field

[0001] This application relates to the field of interferometer protection technology, specifically to a protective device suitable for portable laser interferometers. Background Technology

[0002] Laser interferometers are devices that achieve high-precision measurements based on the principle of light interference. They can accurately detect parameters such as length, displacement, and angle, and are core tools for ensuring the accuracy of machine tools, instruments, and other equipment in fields such as aerospace and precision manufacturing. However, their measurement accuracy is easily affected by environmental interference, therefore, the reliability of the protective structure is extremely important.

[0003] Existing protective devices for laser interferometers have significant shortcomings: poor sealing performance of the protective enclosure allows dust to easily enter and adhere to the surface of the laser interferometer; lack of heat dissipation function means that the equipment operates in a semi-enclosed environment for extended periods, leading to heat accumulation and reduced lifespan; the protective structure often only accommodates laser interferometers of specific sizes, making it difficult to adapt to different specifications and sizes, and lacks cushioning protection; and it lacks a detachable structure, making it difficult to wipe the lens or operate the optical components on the back of the laser interferometer without moving it. These problems, whether present simultaneously or individually, make existing protective structures unable to meet increasingly complex practical needs. Therefore, there is a need to design a protective device that avoids these problems and is cost-effective, simple, and durable. Summary of the Invention

[0004] The purpose of this application is to provide a protective device for portable laser interferometers, which enhances the protection of portable laser interferometers, extends their service life, expands the range of sizes to which the protective device can adapt to portable laser interferometers, and improves the ease of use of portable laser interferometers.

[0005] To achieve the above objectives, a first aspect of this application provides a protective device for a portable laser interferometer, the protective device comprising: a housing for accommodating the target interferometer; the housing being composed of multiple panels, wherein at least two panels have ventilation openings, and a heat dissipation channel is formed between the ventilation openings on the two panels, wherein when the target interferometer is placed inside the housing, the target interferometer is positioned on the heat dissipation channel; a heat dissipation device connected to the housing for controlling the temperature inside the housing within a desired range; and a fixing mechanism connected to the housing for adapting and fixing the target interferometer according to its size; wherein the target interferometer fixed inside the housing does not directly contact the inner wall of any panel.

[0006] Based on the first aspect, in the embodiments of this application, the heat dissipation device includes a fan, at least one of the vents is adapted to the shape of the fan, and the fan is disposed in the adapted vent and fixedly connected to the corresponding panel.

[0007] Based on the first aspect, in the embodiments of this application, the protective device further includes a filter screen; the filter screen covers the entire opening section of the vent, and the filter screen is fixedly connected to the corresponding box panel.

[0008] Based on the first aspect, in this embodiment of the application, the fixing mechanism includes: two clamping rods of equal height, equal length and parallel arrangement for clamping and fixing the target interferometer; and an adjustment component, which is fixedly connected to the bottom panel of the housing, and the adjustment component is respectively connected to the two clamping rods for adjusting the distance between the two clamping rods and fixing the position of the two clamping rods.

[0009] Based on the first aspect, in the embodiments of this application, rubber pads are respectively glued to the sides of the two clamping rods that are close to each other.

[0010] Based on the first aspect, in the embodiments of this application, the adjusting component includes: a bidirectional lead screw, on which two threads with opposite directions and the same lead are formed, the two threads being respectively disposed near the ends of both ends of the bidirectional lead screw; at least one guide rod, the axis of the guide rod being parallel to the axis of the bidirectional lead screw; a base frame, the base frame having a receiving cavity for receiving and fixing the bidirectional lead screw or the guide rod, the base frame being connected to the bottom panel of the housing, and its receiving cavity communicating with the inner cavity of the housing; the bidirectional lead screw being rotatably connected to the base frame, and the guide rod being fixedly connected to the base frame, the bidirectional lead screw and the guide rod being connected... The connection is not to the same base frame; the threaded sleeve is adapted to the double-acting screw, and both sides of the threaded sleeve are slidably connected to the base frame; the two ends of the double-acting screw are respectively fitted with threaded sleeves, and when the double-acting screw is rotated, the threaded sleeves at both ends of the double-acting screw move closer or further apart along its axial direction; the sliding sleeve is adapted to the guide rod, and both sides of the sliding sleeve are slidably connected to the base frame; the two ends of the guide rod are respectively fitted with sliding sleeves; the transition connector has one end connected to the threaded sleeve or the sliding sleeve, and the other end connected to the clamping rod; the axial direction of the clamping rod is perpendicular to the axial direction of the double-acting screw.

[0011] Based on the first aspect, in the embodiments of this application, the adjustment component further includes a manual turntable, one end of the bidirectional lead screw is rotatably connected to one side wall of the bottom frame, and the other end extends through the opposite side wall of the bottom frame and is fixedly connected to the manual turntable (the two ends of the guide rod do not need to extend out).

[0012] Based on the first aspect, in this embodiment of the application, the housing is rectangular, and includes a top panel, a bottom panel, and two sets of side panels. Each set of side panels includes two opposing side panels with parallel surfaces. The bottom panel is connected to the two sets of side panels on all four sides (without gaps between adjacent side panels). For one set of side panels, one side of the top panel is rotatably connected to the top of one of the side panels, and the other side of the top panel is provided with a locking part. The top of the other side panel in the same set is provided with a locking fitting part adapted to the locking part. For the other set of side panels, at least one of the side panels is a functional panel, which includes a window frame with ventilation openings and a protective plate connected to the window frame for opening and closing the ventilation openings. The protective plate is snap-fitted or slidably connected to the window frame. The area of ​​the ventilation openings on the window frame is not less than 80% (the proportion of the ventilation openings to the surface area of ​​the panel), and the large window facilitates lens cleaning and other operations by the user.

[0013] Based on the first aspect, in this embodiment of the application, the protective plate is slidably connected to the window frame plate; the window frame plate is a rectangular frame plate, including four frame sides, wherein the inner walls of two parallel frame sides are respectively provided with sliding grooves, and the outer wall of one frame side is provided with a slot along the length direction of the frame side, the frame side with the slot is perpendicular to the frame side with the sliding groove; two of the parallel side walls of the protective plate are respectively provided with slide rails adapted to the sliding grooves, and the other two side walls of the protective plate are adapted to the slots; the functional box plate also includes a limiting plate, a handle, a first magnet and a second magnet; the limiting plate is connected to one side wall of the protective plate adapted to the slot, the handle is connected to the limiting plate, the first magnet is disposed on the limiting plate, and the second magnet is disposed on the window frame plate; wherein, the plate surface of the limiting plate connected to the handle and the plate surface of the limiting plate connected to the protective plate are opposite to each other; the first magnet is located on the plate surface connected to the limiting plate; the second magnet is located on the outer wall of the frame side where the slot is located; the first magnet and the second magnet are adapted to attract each other.

[0014] Based on the first aspect, in the embodiments of this application, the protective device further includes a mounting base, which is disposed at the bottom of the housing.

[0015] Based on the first aspect, in this embodiment of the application, a support base is also provided on the bottom box plate inside the box, and the height of the support base is higher than the height of the threaded sleeve and the sliding sleeve.

[0016] Based on the first aspect, in the embodiments of this application, a screw hole is provided on the top box plate, and a nylon top wire is inserted into the screw hole. When the target interferometer is placed in the box, it is fixed between the support base and the nylon top wire.

[0017] Based on the first aspect, in this embodiment of the application, the protective device further includes: a temperature sensing device, which is fixed inside the enclosure; used to acquire the temperature value inside the enclosure in real time; a controller, which is connected to the temperature sensing device and the heat dissipation device respectively; used to receive the temperature value acquired in real time by the temperature sensor, and determine whether the temperature value is higher than a threshold. If so, a heat dissipation command is generated; the heat dissipation device responds to the heat dissipation command and performs a heat dissipation operation.

[0018] Secondly, this application also provides a method of using a protective device, applicable to the aforementioned protective device. The method of use includes: fixing the target interferometer in a housing and sealing the housing; when in use, fixing the housing to the target position, opening the ventilation opening on the viewing window frame, starting the target interferometer, and setting the workpiece to be inspected facing the target interferometer; when idle, turning off the target interferometer, closing the ventilation opening on the viewing window frame, and sealing the housing.

[0019] Based on the second aspect, in the embodiments of this application, fixing the target interferometer in the housing includes: placing the target interferometer between two clamping rods, adjusting the distance between the two clamping rods using an adjusting component, and suspending the target interferometer above the bottom housing plate without exposing it to the housing.

[0020] The solution provided in this application has at least the following beneficial effects: 1) The protective device provided in this application allows the interferometer to be started by opening the ventilation opening on the viewing window frame when in use; when not in use, the interferometer is turned off, the ventilation opening on the viewing window frame is closed, and the enclosure is sealed. In this way, the interferometer can be stored inside the enclosure for extended periods, regardless of use, without frequent access. This facilitates movement and transportation, and enhances the protection of the interferometer. 2) The special structure of the enclosure and the existence of the heat dissipation device lay the foundation for the controllable temperature inside the enclosure, providing a stable temperature environment for the target interferometer in operation. 3) The fixing mechanism can be adapted to fix the target interferometer according to its size, expanding the application range of the protective device and improving its ease of use. Furthermore, the target interferometer fixed by the fixing mechanism does not directly contact any inner wall of the enclosure, ensuring efficient heat dissipation.

[0021] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings: Figure 1The schematic diagram shows the structure of the protective device from a first-person perspective; Figure 2 The schematic diagram shows the structure of the protective device from a second perspective; Figure 3 The schematic diagram illustrates the structure of the protective device from a third-person perspective; Figure 4 A schematic top view of the interior of the box is shown. Figure 5 A schematic cross-sectional view of the protective device is shown.

[0023] Explanation of reference numerals in the attached figures 1. Housing; 11. Top panel; 12. Bottom panel; 13. Viewing window frame; 14. Protective plate; 15. Limiting plate; 16. Handle; 17. First magnetic block; 18. Second magnetic block; 2. Heat dissipation device; 3. Fixing mechanism; 31. Clamping rod; 32. Rubber pad; 33. Two-way lead screw; 34. Guide rod; 35. Bottom frame; 36. Threaded sleeve; 37. Sliding sleeve; 38. Transition connector; 39. Manual turntable; 4. Filter screen; 5. Support base; 6. Locking part; 7. Locking adapter part; 100. Target interferometer. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0026] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0027] Example 1

[0028] Please refer to Figure 1 and Figure 2 The protective device provided in this embodiment mainly includes a housing 1, a heat dissipation device 2, and a fixing mechanism 3; as detailed below:

[0029] The enclosure 1 houses the target interferometer 100. The enclosure 1 is composed of multiple panels, with at least two panels having ventilation openings. A heat dissipation channel is formed between the ventilation openings on the two panels. When the target interferometer 100 is placed inside the enclosure 1, it is positioned on the heat dissipation channel. In this embodiment, a common cuboid enclosure 1 is used, with ventilation openings on at least two panels, preferably with the two panels facing each other (to improve heat dissipation efficiency). Since the target interferometer 100 needs to expose its transceiver end during use (so that it can smoothly emit detection light to the test object located outside the enclosure 1 and receive reflected light from the test object), the enclosure 1 (or its four side walls) needs at least one window for connecting to the outside. This window only needs to be opened when the target interferometer 100 is working, and the heat dissipation device 2 usually only needs to be activated when the target interferometer 100 is working. Therefore, this window can serve as both the working window of the target interferometer 100 and a ventilation opening. In addition to the window, the housing 1 also needs to have at least one ventilation opening, which works in conjunction with the window to form an airflow channel for heat dissipation.

[0030] A heat dissipation device 2 is connected to the housing 1 and is used to control the temperature inside the housing 1 within a desired range. For example, the heat dissipation device 2 is a fan, which can either draw in outside air and blow it into the housing 1, or draw air from inside the housing 1 to the outside. Its specific installation orientation is not limited in this embodiment. Preferably, to enable direct monitoring of the temperature inside the housing 1, a temperature sensor can be installed inside the housing 1 to detect the temperature value in real time. Based on the temperature sensor, a specific temperature (range) value can be set as the trigger condition for the heat dissipation device 2 to operate, achieving closed-loop control. Of course, if it is inconvenient to install a temperature sensor, a simpler triggering method can be used, such as simultaneously turning on the heat dissipation device 2 when the target interferometer 100 is working, reducing the hysteresis effect of temperature control.

[0031] A fixing mechanism 3, connected to the housing 1, is used to adapt and fix the target interferometer 100 according to its size. The fixing mechanism 3 securely fixes the target interferometer 100 inside the housing 1, ensuring that the target interferometer 100 does not directly contact the inner wall of any panel. Since the fixing mechanism 3 can accommodate target interferometers 100 within a certain size range, this means that the fixing mechanism 3 has an "adjustable function" to accommodate target interferometers 100 of different sizes. For example, the fixing mechanism 3 includes a pair of clamping rods 31 (two rods) and an adjustment assembly, specifically:

[0032] Two clamping rods 31 (vertically positioned) of equal height and length, and arranged in parallel, are used to clamp and fix the target interferometer 100. In this embodiment, two clamping rods 31 are used to directly clamp the target interferometer 100. Therefore, the two clamping rods 31 are preferably the same (equal length and diameter) and positioned at the same height (to prevent flipping) and parallel (to fit the target interferometer 100; interferometers are usually regularly shaped, and being parallel to each other can increase the contact area with the target interferometer 100 and avoid gaps).

[0033] The adjustment assembly is fixedly connected to the bottom panel 12 of the housing 1. The adjustment assembly is connected to two clamping rods 31, which are used to adjust the distance between the two clamping rods 31 and to fix their positions. In other words, the adjustment assembly adapts to interferometers 100 of different sizes by adjusting the distance between the two clamping rods 31. It can adjust the positions of the two clamping rods 31 and also fix their positions to remain unchanged, thus achieving a "clamping" function.

[0034] Example 2

[0035] This embodiment further explains the structure of the housing 1 and the positional arrangement of the heat dissipation device 2 in Embodiment 1.

[0036] Specifically, such as Figure 2As shown, the box 1 is a cuboid and includes a top box panel 11, a bottom box panel 12, and two sets of side box panels. Each set of side box panels includes two opposite side box panels with parallel surfaces. The bottom box panel 12 is connected to the two sets of side box panels on all four sides (there are no gaps between adjacent side panels, and the surface of any side box panel is perpendicular to the surface of the bottom box panel 12). For easy distinction, the two sets of side box panels are named the first set of side box panels and the second set of side box panels, respectively.

[0037] For the first group of side panels, for one of the side panels, one side of the top panel 11 is rotatably connected to the top of the other side panel, and the other side of the top panel 11 is provided with a locking part 6. The top of the other side panel in the same group is provided with a locking adapter part 7 that is adapted to the locking part 6; specifically as follows Figure 1 As shown, one side of the top panel 11 is rotatably connected to the top of one of the side panels via a hinge. The locking part 6 consists of a bolt and a first threaded seat for fixing the bolt, with the bolt's axis perpendicular to the surface of the top panel 11. A locking adapter 7, adapted to the locking part 6, is located on the top of the other side panel and is adapted to the position and shape of the locking part 6. The locking part 6 adapter consists of a threaded washer and a second threaded seat for fixing the threaded washer, wherein the bolt can be threadedly connected to the threaded washer.

[0038] For the second set of side panels, at least one side panel is a functional panel, which includes a window frame 13 with ventilation openings and a protective plate 14 connected to the window frame 13 for opening and closing the ventilation openings. The protective plate 14 is snap-fitted to or slidably connected to the window frame 13. The area of ​​the ventilation openings on the window frame 13 is not less than 80% (the proportion of the ventilation openings to the surface area of ​​the panel). The large window facilitates lens cleaning and other operations for the user. As described in Embodiment 1, this ventilation opening also needs to be used as a working window. In this embodiment, it is preferable that both side panels in this set are functional panels to facilitate operation of the target interferometer 100 from two directions, without having to pay too much attention to its orientation when fixing the target interferometer 100.

[0039] Taking the sliding connection between the protective plate 14 and the window frame plate 13 as an example, the window frame plate 13 is a rectangular frame plate with four frame sides. Two parallel frame sides have grooves on their inner walls, and one frame side has a slot along its length on its outer wall. The frame side with the slot is perpendicular to the frame side with the groove. Two parallel sidewalls of the protective plate 14 have slide rails adapted to the grooves, and the other two sidewalls of the protective plate 14 are adapted to the slots. That is, the protective plate 14 can slide through the slot and engage with the grooves on the window frame plate 13. When it is necessary to open the ventilation opening on the window frame plate 13, the protective plate 14 can be removed from the slot. Figure 1As shown in the figure, the protective plate 14 slides horizontally. If the protective plate slides vertically, the frame edge where the slide rail is located and the frame edge where the strip hole is located need to be interchanged.

[0040] Furthermore, to prevent the protective plate 14 from sliding off the slot during the movement of the housing 1, in this embodiment, the functional housing plate further includes a limiting plate 15, a first magnetic block 17, and a second magnetic block 18; the limiting plate 15 is connected to one side wall of the protective plate 14 that is adapted to the slot, the first magnetic block 17 is disposed on the limiting plate 15, and the second magnetic block 18 is disposed on the window frame plate 13; the first magnetic block 17 is located on the plate surface connected to the limiting plate 15; the second magnetic block 18 is located on the outer wall of the frame where the slot is located; the first magnetic block 17 and the second magnetic block 18 are adapted to attract each other, such as... Figure 1 and Figure 3 As shown. The first magnetic block 17 and the second magnetic block 18 can temporarily fix the protective plate 14, facilitating the opening and closing control of the ventilation openings on the window frame plate 13. Furthermore, for ease of force application, the functional box plate also includes a handle 16, which is connected to a limiting plate 15, with the surface of the limiting plate 15 connecting to the handle 16 and the surface of the limiting plate 15 connecting to the protective plate 14 facing away from each other. Preferably, the handle 16 is located in the middle of its respective plate surface. Furthermore, in this embodiment, the bottom box plate 12, the first set of side panels, and the two aforementioned window frame plates 13 are integrally connected, which can improve the stability of the box body 1 structure, and the box body 1 is easy to process, enabling mass production in a short time.

[0041] Additionally, the fan can be installed in the remaining ventilation openings mentioned above, for example, such as... Figure 1 and Figure 3 As shown, the vent is machined into a circle to fit the fan. In this embodiment, the fan is mounted on the top panel 11. To improve heat dissipation efficiency, a vent is also provided on the bottom panel 12 opposite to the top panel 11. This eliminates the need to rely entirely on the vents on the side window frame 13, improving airflow within the enclosure 1. Since most portable laser interferometers typically adopt a "standard integrated" design, their main heat-generating components, such as the laser source, electronic components, and receiver, are integrated into the "laser head" at the end. Therefore, the vent on the bottom panel 12 is preferably located close to the "laser head." Furthermore, for ease of use, a fan with a built-in battery can be used, eliminating the need for constant power supply during operation.

[0042] Furthermore, in addition to the vents on the viewing window frame 13, filters 4 can be covered or filled on the other vents, covering the entire opening cross-section of the vent. The filters 4 are then fixedly connected to the corresponding housing panels. This mainly applies to the vents on the top housing panel 11 and the bottom housing panel 12. The filters 4 can filter out large dust particles in the air entering the housing 1, preventing blockage of the instrument's vents and other parts, ensuring the instrument's measurement accuracy, and extending its service life.

[0043] Example 3

[0044] This embodiment will further explain the adjustment component in Example 1.

[0045] For example, such as Figure 4 (Looking down) and Figure 5 (Viewed from the axial direction of the bidirectional lead screw), the adjusting assembly specifically includes a bidirectional lead screw 33, at least one guide rod 34, a base frame 35, a threaded sleeve 36, a sliding sleeve 37, and a transition connector 38; wherein, the bidirectional lead screw 33 has two sections of threads with opposite directions and the same lead, the two sections of threads being located near the ends of the bidirectional lead screw 33; the axial direction of the guide rod 34 is parallel to the axial direction of the bidirectional lead screw 33; the base frame 35 has a receiving cavity for receiving and fixing the bidirectional lead screw 33 or the guide rod 34, the base frame 35 is connected to the bottom plate 12 of the housing 1, and its receiving cavity communicates with the inner cavity of the housing 1; the bidirectional lead screw 33 is rotatably connected to the base frame 35, and the guide rod 34 is rotatably connected to the bottom plate 34. Rod 34 is fixedly connected to bottom frame 35; threaded sleeve 36 is adapted to double-acting screw 33, and both sides of threaded sleeve 36 are slidably connected to bottom frame 35; threaded sleeve 36 is sleeved on both ends of double-acting screw 33, and when double-acting screw 33 is rotated, the threaded sleeves 36 on both ends of double-acting screw 33 move closer or further away from each other along its axial direction; sliding sleeve 37 is adapted to guide rod 34, and both sides of sliding sleeve 37 are slidably connected to bottom frame 35; sliding sleeve 37 is sleeved on both ends of guide rod 34; one end of transition connector 38 is connected to threaded sleeve 36 or sliding sleeve 37, and the other end is connected to clamp rod 31; the axial direction of clamp rod 31 is perpendicular to the axial direction of double-acting screw 33.

[0046] Based on the above structure, when it is necessary to adjust the distance between the two clamping rods 31, simply rotate the bidirectional lead screw 33 (clockwise or counterclockwise) to control the two clamping rods 31 to move closer or further apart.

[0047] For ease of control (ensuring parallelism and consistency of movement between the two clamping rods 31 during adjustment), this embodiment uses only one bidirectional lead screw 33. Threaded sleeves 36, respectively fitted onto the two ends of the bidirectional lead screw 33's threads, are also slidably connected to the corresponding base frame 35, achieving anti-rotation. When the lead screw is rotated, the threaded sleeves 36 will only slide linearly along the axial direction of the bidirectional lead screw 33. Since the threaded sleeves 36 are connected to the clamping rods 31 via the transition connector 38, they can move the two clamping rods 31 closer together or further apart. The guide rod 34 is used to assist in supporting the clamping rods 31. Figure 4 Only one guide rod 34 is shown, but to ensure even force distribution, an even number of guide rods 34 are preferably arranged symmetrically on both sides of the bidirectional lead screw 33. When the bidirectional lead screw 33 is rotated, the threaded sleeve 36 drives the two clamping rods 31 to move via the transition connector 38. Similarly, the sliding sleeve 37, which is connected to the clamping rods 31 via the transition connector 38, slides linearly along the axial direction of the guide rod 34 under the action of the clamping rods 31. When the bidirectional lead screw 33 is not rotated, the threaded connection between the threaded sleeve 36 and the bidirectional lead screw 33 prevents relative slippage, achieving "start and stop instantly".

[0048] In addition, the heights of the sliding sleeve 37 and the threaded sleeve 36 are preferably the same (provided that the diameters of the double-acting screw 33 and the guide rod 34 are the same) so that the axial direction of the clamping rod 31 is parallel to the horizontal plane. However, as long as the two clamping rods 31 are always parallel, a slight angle between the axial direction of the clamping rod 31 and the horizontal plane will not affect its clamping ability. Therefore, this embodiment does not impose strict restrictions on this.

[0049] Furthermore, to facilitate the rotation of the double lead screw, the adjustment assembly also includes a manual turntable 39. One end of the bidirectional lead screw 33 is rotatably connected to one side wall of the base frame 35, and the other end extends through the opposite side wall of the base frame 35 and is fixedly connected to the manual turntable 39; the portion extending through the base frame 35 is not included in the threaded section. Additionally, both ends of the guide rod 34 only need to be fixedly connected to the inner walls of both sides of the base frame 35, respectively, and do not need to extend through.

[0050] Furthermore, rubber pads 32 are glued to the sides of the two clamping rods 31 that are close to each other. The target interferometer 100 is clamped between the two clamping rods 31. The inner sides of the two clamping rods 31 need to be in direct contact with the target interferometer 100. By adding a layer of rubber pads 32, not only can the target interferometer 100 be protected, but the friction between the rubber pads and the target interferometer 100 can also be increased, thereby improving the stability of the fixation.

[0051] Example 4

[0052] This embodiment further optimizes the fixing mechanism 3 used for fixing the target interferometer 100 based on embodiment 3.

[0053] To improve heat dissipation efficiency, in the above embodiment, the target interferometer 100 preferably does not abut against any inner wall of the housing 1 (i.e., including the bottom panel 12), and the bottom panel 12 is also provided with ventilation holes. Therefore, the target interferometer 100 cannot directly contact the bottom panel 12 to avoid blocking the ventilation openings. Thus, the clamping rod 31 not only needs to limit the target interferometer 100 in the horizontal direction but also needs to support the weight of the target interferometer 100 and limit its movement in the vertical direction, which undoubtedly increases the burden on the adjustment components.

[0054] For the reasons mentioned above, in this embodiment, a support base 5 is provided on the bottom box plate 12, and the height of the support base 5 is higher than the height of the threaded sleeve 36 and the sliding sleeve 37. The support base 5 can be located in the middle of the bottom box plate 12, and the ventilation openings on the bottom box plate 12 are located on both sides of the support base 5. The area of ​​the support base 5 should not be too large; therefore, multiple evenly distributed support columns can be used instead. In this way, the clamping rod 31 does not need to bear the entire weight of the target interferometer 100, reducing the pressure on the adjustment components and extending their service life.

[0055] The clamping rods 31 can limit and fix the target interferometer 100 in the horizontal direction, while the support base 5 can only limit the target interferometer 100 in one direction in the vertical direction. Therefore, furthermore, screw holes can be opened on the top box plate 11, and nylon set screws are inserted into the screw holes. When the target interferometer 100 is placed in the box 1, it is fixed between the support base 5 and the nylon set screws. When the target interferometer 100 is placed on the support base 5 and clamped between the two clamping rods 31, the top cover plate is closed, and then the nylon set screws are rotated so that their ends abut against the top of the target interferometer 100. The screw holes and nylon set screws are evenly distributed on the surface of the top box plate 11.

[0056] In addition, to facilitate the fixing of the housing 1, in this embodiment, the protective device also includes a mounting base, which is located at the bottom of the housing 1. The mounting base has a pre-drilled threaded groove for fixing, which can be used with fasteners to fix the device in a designated working position. In this embodiment, since a bottom frame 35 is also connected to the bottom panel 12, if the mounting base is hidden between the two bottom frames 35, the dimensional relationship between the mating fixing end of the mounting base and the two bottom frames 35 needs to be considered. Therefore, in this embodiment, it is preferable that the mounting base protrudes from the bottom frame 35, that is, the lowest point of the mounting base is lower than the lowest point of the two bottom frames 35, so that the mounting base can adapt to more platforms.

[0057] Example 5

[0058] This embodiment provides a detailed explanation of the usage methods and application scenarios of the protective devices provided in Embodiments 1 to 4.

[0059] Specifically, this embodiment provides a method for using a protective device, applicable to the protective devices in embodiments 1-4 above, the method of use including: Fix the target interferometer 100 in the housing 1 and seal the housing 1; In use, fix the housing 1 to the target position, open the ventilation port on the viewing window frame 13, start the target interferometer 100, and set the workpiece to be inspected to face the target interferometer 100; (using a temperature sensing device) obtain the temperature value inside the housing 1 in real time, determine whether the temperature value is higher than the threshold, and if so, generate a heat dissipation command; the heat dissipation device 2 responds to the heat dissipation command and performs heat dissipation operation; For example, the heat dissipation device 2 includes a fan, and the heat dissipation operation includes fan rotation. If the fan is adjustable, the corresponding operating power (speed) can also be matched according to the obtained implementation temperature value. In this embodiment, if the location of the heating element of the target interferometer 100 is close to the vent where the fan is located, then the vent where the fan is located is the air outlet (the fan is responsible for drawing the air inside the housing 1 to the outside). If the location of the heating element of the target interferometer 100 is far away from the vent where the fan is located, then the vent where the fan is located is the air inlet (the fan is responsible for blowing the air outside the housing 1 into the housing 1).

[0060] When not in use, the target interferometer 100 is turned off, the ventilation openings on the viewing window frame 13 are closed, and the housing 1 is sealed.

[0061] For example, a switching valve may be added to open or close the vents located on the top panel 11 or the bottom panel 12. For instance, if the vents on the top panel 11 are circular, an array of rotary valves adapted to them may be configured (to precisely control the connection or closure of multiple holes on the outer fixed ring (stationary ring) by rotating a ring (moving ring) with multiple sets of holes).

[0062] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0063] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A protective device suitable for portable laser interferometers, characterized in that, The protective device includes: The box (1) is used to house the target interferometer (100); the box (1) is composed of multiple box panels, at least one of which is provided with a ventilation opening, and a heat dissipation channel is formed between the ventilation openings on two box panels. When the target interferometer (100) is placed inside the box (1), the target interferometer (100) is located on the heat dissipation channel. Heat dissipation device (2), which is connected to the box (1) and is used to control the temperature inside the box (1) within the desired range; The fixing mechanism (3) is connected to the box (1) and is used to fix the target interferometer (100) according to the size of the target interferometer (100); the target interferometer (100) fixed in the box (1) does not directly contact the inner wall of any box plate.

2. The protective device according to claim 1, characterized in that, The heat dissipation device (2) includes a fan, and at least one of the vents is adapted to the shape of the fan. The fan is disposed in the adapted vent and fixedly connected to the corresponding panel.

3. The protective device according to claim 1, characterized in that, The protective device also includes a filter screen (4); the filter screen (4) covers the entire opening section of the ventilation port, and the filter screen (4) is fixedly connected to the corresponding box plate.

4. The protective device according to claim 1, characterized in that, The fixing mechanism (3) includes: Two clamping rods (31) of equal height and parallel arrangement are used to clamp and fix the target interferometer (100). The adjustment component is fixedly connected to the bottom panel (12) of the box body (1). The adjustment component is connected to two clamping rods (31) respectively, which are used to adjust the distance between the two clamping rods (31) and fix the position of the two clamping rods (31).

5. The protective device according to claim 4, characterized in that, Rubber pads (32) are glued to the sides of the two clamping rods (31) that are close to each other.

6. The protective device according to claim 4, characterized in that, The adjustment component includes: A two-way lead screw (33) is provided with two threads with opposite directions and the same lead, and the two threads are respectively provided near the ends of both ends of the two-way lead screw (33); At least one guide rod (34), the axis of which is parallel to the axis of the bidirectional lead screw (33); The bottom frame (35) is provided with a receiving cavity for accommodating and fixing the bidirectional lead screw (33) or the guide rod (34). The bottom frame (35) is connected to the bottom box plate (12) of the box body (1), and its receiving cavity is connected to the inner cavity of the box body (1). The bidirectional lead screw (33) is rotatably connected to the bottom frame (35), and the guide rod (34) is fixedly connected to the bottom frame (35). A threaded sleeve (36) is adapted to a bidirectional lead screw (33), and the two sides of the threaded sleeve (36) are slidably connected to the bottom frame (35); the two ends of the bidirectional lead screw (33) are respectively fitted with threaded sleeves (36), and when the bidirectional lead screw (33) is rotated, the threaded sleeves (36) at both ends of the bidirectional lead screw (33) move closer to each other or further away from each other along its axial direction; Sliding sleeve (37), which is adapted to guide rod (34), and the two sides of the sliding sleeve (37) are slidably connected to the bottom frame (35); the two ends of the guide rod (34) are respectively fitted with sliding sleeve (37). A transition connector (38) is provided, one end of which is connected to a threaded sleeve (36) or a sliding sleeve (37), and the other end is connected to a clamping rod (31); the axial direction of the clamping rod (31) is perpendicular to the axial direction of the double-acting screw (33).

7. The protective device according to claim 6, characterized in that, The adjustment assembly also includes a manual turntable (39), one end of the bidirectional lead screw (33) is rotatably connected to one side wall of the bottom frame (35), and the other end extends through the opposite side wall of the bottom frame (35) and is fixedly connected to the manual turntable (39).

8. The protective device according to claim 1, characterized in that, The box (1) is a cuboid. The box (1) includes a top box panel (11), a bottom box panel (12) and two sets of side box panels. Each set of side box panels includes two opposite side box panels with parallel surfaces. The bottom box panel (12) is connected to the two sets of side box panels on all four sides. For one set of side panels, one side of the top panel (11) is rotatably connected to the top of one of the side panels, and the other side of the top panel (11) is provided with a locking part (6). The top of another side panel in the same set is provided with a locking adapter part (7) that is adapted to the locking part (6). For another set of side panels, at least one of the side panels is a functional panel, which includes a window frame (13) with a ventilation opening and a protective plate (14) connected to the window frame (13) for opening and closing the ventilation opening thereon; the protective plate (14) is snap-fitted or slidably connected to the window frame (13); the area of ​​the ventilation opening on the window frame (13) is not less than 80%.

9. The protective device according to claim 8, characterized in that, The protective plate (14) is slidably connected to the window frame plate (13); the window frame plate (13) is a rectangular frame plate with four frame sides, wherein the inner walls of two parallel frame sides are respectively provided with sliding grooves, and the outer wall of one frame side is provided with a strip hole along the length direction of the frame side; the frame side with the strip hole is perpendicular to the frame side with the sliding groove. The protective plate (14) has two parallel sidewalls respectively provided with slide rails adapted to the slide groove, and the other two sidewalls of the protective plate (14) are adapted to the slot. The functional box panel also includes a limiting plate (15), a handle (16), a first magnetic block (17), and a second magnetic block (18); the limiting plate (15) is connected to one side wall of the adapting strip hole on the protective plate (14), the handle (16) is connected to the limiting plate (15), the first magnetic block (17) is disposed on the limiting plate (15), and the second magnetic block (18) is disposed on the window frame plate (13); wherein, the plate surface of the limiting plate (15) connected to the handle (16) and the plate surface of the limiting plate (15) connected to the protective plate (14) are opposite to each other; the first magnetic block (17) is located on the plate surface connected to the limiting plate (15); the second magnetic block (18) is located on the outer wall of the frame where the strip hole is located; the first magnetic block (17) and the second magnetic block (18) are adapted to attract each other.

10. The protective device according to claim 1, characterized in that, The protective device also includes: A temperature sensing device is fixed inside the box (1) to obtain the temperature value inside the box (1) in real time. The controller is connected to the temperature sensing device and the heat dissipation device (2) respectively; it is used to receive the temperature value obtained by the temperature sensor in real time and determine whether the temperature value is higher than the threshold. If so, it generates a heat dissipation command; the heat dissipation device (2) responds to the heat dissipation command and performs heat dissipation operation.

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