A detection device for facilitating measurement of a distance
Patent Information
- Application Number
- CN202522267683.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-27
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-10-27
AI Technical Summary
[0004]本实用新型的目的在于提供一种便于测量间距的检测装置，能够解决现有技术中通常需分别使用内径千分尺和框式水平仪分步操作，耗时较长，易产生累积误差的技术问题
1、该装置通过可伸缩架适配范围、刚性传动保精度、双参数同步测和环境辅助修正的协同设计，实现了圆弧导轨间距与垂直度的高效、高精度测量，适配风洞模型支架段的复杂安装场景。
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Figure CN224802345U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of equipment testing technology, and more specifically, to a testing device that facilitates the measurement of spacing. Background Technology
[0002] During the installation of the support section of a large transonic wind tunnel model, the curved support plate's arc-shaped operating mechanism is a core component, and its accuracy directly affects the reliability of the wind tunnel test. The arc-shaped guide rails in this mechanism serve as the moving track for the curved support plate and must meet stringent installation accuracy requirements. Specifically, the parallelism tolerances of the arc-shaped guide rails on both sides and the coaxiality tolerances of the rails on the same side are subject to high standards, and the perpendicularity deviation between the track surface and the reference plane must be controlled within an extremely small range.
[0003] However, in actual operation, the existing measurement methods require simultaneous detection of the spacing and perpendicularity of the arc guide rail. However, the existing technology usually requires separate operation using an inside micrometer (to measure the spacing) and a frame level (to measure the perpendicularity). This is not only time-consuming, but also prone to cumulative errors due to the inconsistency of the references for the two measurements, making it difficult to meet the efficiency and accuracy requirements of the installation process. Utility Model Content
[0004] The purpose of this invention is to provide a detection device that facilitates the measurement of spacing, which can solve the technical problem that the existing technology usually requires separate operation using an inside micrometer and a frame level, which is time-consuming and prone to cumulative errors.
[0005] The embodiments of this utility model are achieved through the following technical solutions: A detection device for facilitating the measurement of spacing includes a telescopic measuring frame, on which a spacing measuring unit and a perpendicularity measuring unit are connected; the spacing measuring unit is arranged along the axial direction of the telescopic measuring frame and is used to detect the spacing between arc guide rails; the perpendicularity measuring unit is arranged in a direction perpendicular to the axial direction of the telescopic measuring frame and is used to simultaneously detect the perpendicularity of the arc guide rails; both ends of the telescopic measuring frame are provided with contact structures adapted to the surface of the arc guide rail to be measured, and the force direction of the contact structure is consistent with the measurement direction of the spacing measuring unit.
[0006] In some embodiments, the retractable measuring frame includes a plurality of sliding segments that are nested and slidably fitted together in sequence; adjacent sliding segments are fixed relative to each other by a locking mechanism; the contact structure is an arc-shaped contact block, which is fixed to both ends of the retractable measuring frame, the arc surface of the arc-shaped contact block faces outward away from the axis of the retractable measuring frame, and the center line of the arc surface of the arc-shaped contact block is collinear with the axis of the retractable measuring frame.
[0007] In some embodiments, the locking mechanism includes a rack, a pawl, and an unlocking handle; the rack is axially arranged along the outer surface of the sliding section, and the tooth profile of the rack is adapted to the extension and retraction direction of the sliding section; the pawl is hinged to the end of the sliding section by a pin, and the tooth profile of the pawl is complementary to the rack on the adjacent sliding section; a return spring is connected between the tail of the pawl and the surface of the sliding section, and the return spring provides a preload force to engage the pawl in the direction of the rack assembly; the unlocking handle is formed by extending from the middle of the pawl to the outside of the sliding section.
[0008] In some embodiments, the spacing measuring unit includes an inside micrometer and a fine-tuning device; the main body of the inside micrometer is rigidly connected to the outer side of the outermost sliding section, the movable end of the inside micrometer extends along the axial direction of the telescopic measuring frame and is linked with the contact structure at the end of the telescopic measuring frame; the fixed end of the inside micrometer is rigidly connected to the contact structure at the other end; the fine-tuning device is connected to the micrometer spool of the inside micrometer and is located on the side of the telescopic measuring frame, for driving the movable end of the inside micrometer to move precisely along the axial direction.
[0009] In some embodiments, the fine-tuning device includes a knob that is rotatably disposed on the outside of the telescopic measuring frame. A worm gear is fixedly sleeved on the outside of the knob's rotating shaft, and the worm gear meshes with the worm wheel teeth on the outside of the micrometer cylinder of the inside micrometer.
[0010] In some embodiments, the movable end of the inside micrometer is linked to the contact structure via a rigid linkage assembly; the rigid linkage assembly includes a connecting rod and a guide slider, one end of the connecting rod is coaxially and fixedly connected to the outer end of the movable end of the micrometer, and the other end of the connecting rod is rigidly and fixedly connected to the inner sidewall of the contact structure; the guide slider is fixedly sleeved on the outer periphery of the connecting rod and slides in cooperation with the outer side of the innermost sliding section, and its sliding direction is consistent with the measuring axis of the micrometer.
[0011] In some embodiments, the verticality measuring unit includes a frame level, which is fixedly installed on one side of the outermost sliding section. The measuring reference plane of the frame level is perpendicular to the measuring direction of the spacing measuring unit. The contact surface of the frame level is tangent to the apex of the arc surface of the arc-shaped contact block at one end of the telescopic measuring frame.
[0012] In some embodiments, an environmental adaptation component is also included, the environmental adaptation component including a temperature sensor fixed to the end side of the telescopic measuring frame, the detection end of the temperature sensor facing the measurement area of the arc-shaped guide rail.
[0013] In some embodiments, the environmental adaptation component includes a pressure sensor embedded inside a contact structure at the end of a retractable measuring frame.
[0014] The technical solution of this utility model embodiment has at least the following advantages and beneficial effects: 1. This device achieves efficient and high-precision measurement of the arc guide rail spacing and verticality through the collaborative design of telescopic frame adaptability, rigid transmission to ensure accuracy, dual-parameter synchronous measurement and environmental auxiliary correction, and is suitable for the complex installation scenario of wind tunnel model support section. Attached Figure Description
[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 A front view of a detection device for facilitating the measurement of distance, provided in an embodiment of this utility model; Figure 2 A top view of a detection device for facilitating the measurement of distance, provided in an embodiment of this utility model; Figure 3 Rear view of a detection device for facilitating the measurement of distance provided in an embodiment of this utility model; Figure 4 This is a schematic diagram of the locking mechanism provided in an embodiment of the present invention.
[0017] Icons: 1. Sliding section; 2. Arc-shaped contact block; 3. Rack; 4. Pawl; 5. Unlock handle; 6. Return spring; 7. Inside micrometer; 8. Diode; 9. Knob; 10. Worm gear; 11. Worm wheel tooth; 12. Connecting rod; 13. Guide slider; 14. Frame level; 15. Temperature sensor; 16. Pressure sensor. Detailed Implementation
[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0021] In the description of this utility model, it should be noted that if terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" appear to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0023] Please see Figures 1-4 As shown, the main body of this embodiment is a detection device for facilitating the measurement of spacing, including a telescopic measuring frame, a spacing measuring unit and a perpendicularity measuring unit connected to the telescopic measuring frame; the spacing measuring unit is arranged along the axial direction of the telescopic measuring frame and is used to detect the spacing between the arc guide rails; the perpendicularity measuring unit is arranged along a direction perpendicular to the axial direction of the telescopic measuring frame and is used to simultaneously detect the perpendicularity of the arc guide rails; both ends of the telescopic measuring frame are provided with contact structures adapted to the surface of the arc guide rail to be measured, and the force direction of the contact structure is consistent with the measurement direction of the spacing measuring unit.
[0024] Furthermore, the retractable measuring frame includes several sliding segments 1 that are nested and slidably fitted together; adjacent sliding segments 1 are relatively fixed by a locking mechanism; the contact structure is an arc-shaped contact block 2, which is fixed to both ends of the retractable measuring frame. The arc surface of the arc-shaped contact block 2 faces outward away from the axis of the retractable measuring frame, and the center line of the arc surface of the arc-shaped contact block 2 is collinear with the axis of the retractable measuring frame.
[0025] Furthermore, the locking mechanism includes a rack 3, a pawl 4, and an unlocking handle 5; the rack 3 is axially arranged along the outer side of the sliding section 1, and the tooth profile of the rack 3 is adapted to the extension and retraction direction of the sliding section 1; the pawl 4 is hinged to the end of the sliding section 1 by a pin, and the tooth profile of the pawl 4 is complementary to that of the rack 3 on the adjacent sliding section 1; a return spring 6 is connected between the tail of the pawl 4 and the surface of the sliding section 1, and the return spring 6 provides a preload force to engage the pawl 4 in the direction of the rack 3 assembly; the unlocking handle 5 is formed by extending from the middle of the pawl 4 to the outside of the sliding section 1.
[0026] Furthermore, the spacing measuring unit includes an inside micrometer 7 and a fine-tuning device; the main body of the inside micrometer 7 is rigidly connected to the outer side of the outermost sliding section 1, the movable end of the inside micrometer 7 extends along the axial direction of the telescopic measuring frame and is linked with the contact structure at the end of the telescopic measuring frame; the fixed end of the inside micrometer 7 is rigidly connected to the contact structure at the other end; the fine-tuning device is connected to the micrometer cylinder 8 of the inside micrometer 7 and is located on the side of the telescopic measuring frame, used to drive the movable end of the inside micrometer 7 to move precisely along the axial direction.
[0027] Furthermore, the fine-tuning device includes a knob 9, which is rotatably located on the outside of the telescopic measuring frame. A worm gear 10 is fixedly sleeved on the outside of the knob 9's rotating shaft, and the worm gear 10 meshes with the worm wheel teeth 11 on the outside of the micrometer drum 8 of the inner micrometer 7.
[0028] Furthermore, the movable end of the inner micrometer 7 is linked with the contact structure through a rigid linkage assembly; the rigid linkage assembly includes a connecting rod 12 and a guide slider 13. One end of the connecting rod 12 is coaxially and fixedly connected to the outer end of the movable end of the micrometer, and the other end of the connecting rod 12 is rigidly and fixedly connected to the inner sidewall of the contact structure; the guide slider 13 is fixedly sleeved on the outer periphery of the connecting rod 12 and slides in cooperation with the outer side of the innermost sliding section 1, and its sliding direction is consistent with the measuring axis of the micrometer.
[0029] Furthermore, the verticality measuring unit includes a frame level 14, which is fixedly installed on one side of the outermost sliding section 1. The measuring reference plane of the frame level 14 is perpendicular to the measuring direction of the spacing measuring unit. The contact surface of the frame level 14 is tangent to the apex of the arc surface of the arc-shaped contact block 2 at one end of the telescopic measuring frame.
[0030] Furthermore, it also includes an environmental adaptation component, which includes a temperature sensor 15, which is fixed to the end side of the telescopic measuring frame, with the detection end of the temperature sensor 15 facing the measurement area of the arc guide rail.
[0031] Furthermore, the environmental adaptation component includes a pressure sensor 16, which is embedded inside the contact structure at the end of the retractable measuring frame.
[0032] This testing device is used for the simultaneous measurement of the spacing and perpendicularity of the circular arc guide rails in the support section of a large transonic wind tunnel model. It adapts to different guide rail specifications using a telescopic measuring frame, and achieves high-precision measurement through the collaborative work of the spacing and perpendicularity measuring units. Environmental adaptation components further enhance measurement accuracy. Its specific usage process is as follows: 1. Confirm that the sliding section 1 of the telescopic measuring frame is free from jamming, that the rack 3 and pawl 4 of the locking mechanism are engaged normally, and that the return spring 6 has uniform elasticity; check that the zero-position calibration of the inner micrometer 7 of the spacing measuring unit is correct, and that the knob 9, worm 10, and worm gear 11 in the fine-tuning device rotate smoothly; confirm that the bubble level 14 of the verticality measuring unit is undamaged and the scale is clear; check that the detection ends of the temperature sensor 15 and pressure sensor 16 are unobstructed. Based on the estimated spacing of the arc guide rail to be measured, plan the approximate telescopic length of the telescopic measuring frame.
[0033] 2. The operator pulls the unlocking handle 5 of the locking mechanism. The handle drives the pawl 4 to rotate around the pin shaft against the preload of the return spring 6, so that the teeth of the pawl 4 disengage from the tooth groove of the rack 3 of the adjacent sliding section 1, thereby releasing the relative fixed constraint between the sliding sections 1.
[0034] Telescopic adjustment: Push or pull the sliding section 1 of the telescopic measuring frame to make the nested sliding section 1 slide relative to each other along the axial direction until the arc-shaped contact blocks 2 at both ends approach the preset contact position of the arc guide rail to be measured.
[0035] Locking and fixing: When the unlocking handle 5 is released, the pawl 4 is reset under the preload of the return spring 6, and the teeth are re-embedded in the tooth groove of the rack 3. Through the meshing constraint between the rack 3 and the pawl 4, the rigid fixing between the sliding sections 1 is achieved, so that there is no relative displacement in the axial direction after locking, and the length adjustment of the measuring frame is completed.
[0036] 3. Align the arc-shaped contact blocks 2 at both ends of the device with the arc-shaped guide rail surface to be tested, and slowly make the arc surface of the contact blocks fit against the guide rail surface, ensuring that the line connecting the centers of the arc surfaces of the contact blocks is collinear with the symmetrical center line of the two arc-shaped guide rails. Observe the reading of the pressure sensor 16 to ensure that the contact pressure between the contact structure and the guide rail surface is within the preset reasonable range, avoiding excessive pressure that may cause deformation of the guide rail surface or insufficient pressure that may cause unstable contact.
[0037] 4. After the arc-shaped contact block 2 is in contact with the guide rail surface, the contact structure is subjected to the reaction force of the guide rail. The displacement is transmitted to the movable end of the inside micrometer 7 through the connecting rod 12 and guide slider 13 in the rigid linkage assembly. The small displacement of the contact structure is directly transmitted to the movable end of the micrometer through the connecting rod 12. The guide slider 13 slides along the outer side of the innermost sliding section 1, limiting the radial offset of the connecting rod 12 and ensuring that the displacement transmission direction is completely consistent with the micrometer measuring axis to avoid lateral deviation. At this time, the main body of the inside micrometer 7 and the fixed end of the contact structure at the other end form a state of fixed ends and measurement in the middle, and the initial spacing value can be directly read.
[0038] For higher precision measurements, turn knob 9 of the fine-tuning device. Knob 9 rotates the worm gear 10, which meshes with the worm wheel teeth 11 on the outside of the micrometer drum 8 of the inside micrometer 7. This converts the rotational motion into precise axial movement of the micrometer drum 8, which in turn drives the moving end of the micrometer to extend or retract slightly until the reading stabilizes. Finally, the precise distance value is read through the scale of the inside micrometer 7.
[0039] 5. Simultaneously with the spacing measurement, the verticality data is read using the frame-type level 14 of the verticality measuring unit. The frame-type level 14 is fixed to the side of the outermost sliding section 1, and its measuring reference plane is strictly perpendicular to the axis of the telescopic measuring frame of the spacing measuring unit. Furthermore, the contact surface of the level is tangent to the apex of the arc-shaped contact block 2—this design ensures that the measuring reference of the level is consistent with the tangent direction of the arc-shaped guide rail surface, directly reflecting the verticality deviation of the guide rail surface relative to the horizontal plane. Observe the position of the bubble level of the frame-type level 14 and read the verticality value using the scale. It is worth mentioning that when it is necessary to measure the other side of the arc-shaped guide rail surface, the device can be reversed for testing.
[0040] 6. Temperature sensor 15 monitors the ambient temperature of the measurement area in real time. Operators can perform temperature compensation correction on the spacing measurement value based on the temperature value and the thermal expansion coefficient of the guide rail material to avoid errors caused by thermal expansion and contraction of the guide rail due to temperature changes. Pressure sensor 16 monitors the contact pressure in real time. If the pressure exceeds the preset range, the contact structure and the guide rail surface are adjusted in time to ensure the stability of the measurement reference.
[0041] After recording the spacing value, verticality value, and environmental parameters, pull the unlocking handle 5 to release the lock and retract the telescopic measuring frame to its shortest state for easy storage or future use.
[0042] It is worth mentioning that in this device, the sliding section 1 achieves axial extension and retraction through a nested structure, which can adapt to a large range of spacing. The locking mechanism adopts the meshing principle of rack 3 and pawl 4. The preload of the return spring 6 keeps the pawl 4 and rack 3 meshed. The normal constraint force of the tooth surface prevents the sliding section 1 from sliding relative to each other, achieving rigid fixation and ensuring the reference stability during measurement.
[0043] It is worth mentioning that after the contact structure, namely the arc-shaped contact block 2, is in contact with the arc-shaped guide rail surface, the reaction force of the guide rail is transmitted to the moving end of the inner micrometer 7 through the connecting rod 12 and the guide slider 13 in the rigid linkage assembly without gap. This allows the guide slider 13 to restrict the radial sway of the connecting rod 12, ensuring that the displacement is transmitted only along the measurement axis, so that the micrometer reading directly reflects the actual distance between the two guide rail surfaces. The fine adjustment device achieves micron-level precision adjustment through the reduction transmission of the worm gear 10 and the worm wheel teeth 11, meeting the requirements of high-precision measurement.
[0044] It is worth mentioning that the measuring reference plane of the frame level 14 is strictly perpendicular to the axis of the telescopic measuring frame in the direction of spacing measurement, and its contact surface is tangent to the vertex of the arc surface of the arc contact block 2, so that the measuring reference of the level is consistent with the tangent direction of the arc guide rail surface, ensuring that the perpendicularity measurement and the spacing measurement share the same reference coordinate system, avoiding further superposition of errors caused by reference offset, and achieving the effect of one-time positioning and simultaneous measurement of two parameters.
[0045] It is worth mentioning that the temperature sensor 15 monitors the ambient temperature in real time, providing a temperature compensation basis for the spacing measurement value to correct the error of thermal expansion and contraction of the guide rail; the pressure sensor 16 monitors the contact pressure to ensure the stable fit between the contact structure and the guide rail surface, avoiding contact position displacement caused by pressure fluctuations. The two together help to improve the measurement accuracy.
[0046] In summary, through the collaborative design of a telescopic frame with adaptable range, rigid transmission to ensure accuracy, dual-parameter synchronous measurement, and environmental-assisted correction, this device achieves efficient and high-precision measurement of the arc guide rail spacing and verticality, making it suitable for complex installation scenarios of wind tunnel model support sections.
[0047] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A detection device for facilitating the measurement of spacing, characterized in that, The device includes a telescopic measuring frame, on which a spacing measuring unit and a perpendicularity measuring unit are connected. The spacing measuring unit is arranged along the axial direction of the telescopic measuring frame and is used to detect the spacing between the arc guide rails. The perpendicularity measuring unit is arranged in a direction perpendicular to the axial direction of the telescopic measuring frame and is used to simultaneously detect the perpendicularity of the arc guide rails. Both ends of the telescopic measuring frame are provided with contact structures adapted to the surface of the arc guide rail to be measured, and the force direction of the contact structure is consistent with the measurement direction of the spacing measuring unit.
2. The detection device for facilitating distance measurement according to claim 1, characterized in that, The telescopic measuring frame includes several sliding segments (1) that are nested and slidably fitted together. Adjacent sliding segments (1) are fixed to each other by a locking mechanism. The contact structure is an arc-shaped contact block (2), which is fixed to both ends of the telescopic measuring frame. The arc surface of the arc-shaped contact block (2) faces outward away from the axis of the telescopic measuring frame, and the center line of the arc surface of the arc-shaped contact block (2) is collinear with the axis of the telescopic measuring frame.
3. The detection device for facilitating distance measurement according to claim 2, characterized in that, The locking mechanism includes a rack (3), a pawl (4), and an unlocking handle (5); the rack (3) is axially arranged along the outer side of the sliding section (1), and the tooth profile of the rack (3) is adapted to the extension and retraction direction of the sliding section (1); the pawl (4) is hinged to the end of the sliding section (1) by a pin, and the tooth profile of the pawl (4) is complementary to the rack (3) on the adjacent sliding section (1); a return spring (6) is connected between the tail of the pawl (4) and the surface of the sliding section (1), and the return spring (6) provides a preload force to engage the pawl (4) in the direction of the rack (3) assembly; the unlocking handle (5) is formed by extending from the middle of the pawl (4) to the outside of the sliding section (1).
4. The detection device for facilitating distance measurement according to claim 2, characterized in that, The spacing measuring unit includes an inside micrometer (7) and a fine-tuning device; the main body of the inside micrometer (7) is rigidly connected to the outer side of the outermost sliding section (1); the movable end of the inside micrometer (7) extends along the axial direction of the telescopic measuring frame and is linked with the contact structure at the end of the telescopic measuring frame; the fixed end of the inside micrometer (7) is rigidly connected to the contact structure at the other end; the fine-tuning device is connected to the micrometer cylinder (8) of the inside micrometer (7) and is located on the side of the telescopic measuring frame, used to drive the movable end of the inside micrometer (7) to move precisely along the axial direction.
5. The detection device for facilitating distance measurement according to claim 4, characterized in that, The fine-tuning device includes a knob (9), which is rotatably located on the outside of the telescopic measuring frame. A worm gear (10) is fixedly sleeved on the outside of the rotating shaft of the knob (9). The worm gear (10) meshes with the worm wheel teeth (11) on the outside of the micrometer drum (8) of the inner micrometer (7).
6. The detection device for facilitating distance measurement according to claim 4, characterized in that, The movable end of the inner micrometer (7) is linked with the contact structure through a rigid linkage component; the rigid linkage component includes a connecting rod (12) and a guide slider (13). One end of the connecting rod (12) is coaxially fixedly connected to the outer end of the movable end of the micrometer, and the other end of the connecting rod (12) is rigidly fixedly connected to the inner side wall of the contact structure; the guide slider (13) is fixedly sleeved on the outer periphery of the connecting rod (12) and slides in cooperation with the outer side of the innermost sliding section (1), and its sliding direction is consistent with the measuring axis of the micrometer.
7. The detection device for facilitating distance measurement according to claim 4, characterized in that, The verticality measuring unit includes a frame level (14), which is fixedly installed on one side of the outermost sliding section (1). The measuring reference surface of the frame level (14) is perpendicular to the measuring direction of the spacing measuring unit. The contact surface of the frame level (14) is tangent to the apex of the arc surface of the arc-shaped contact block (2) at one end of the telescopic measuring frame.
8. The detection device for facilitating distance measurement according to claim 1, characterized in that, It also includes an environment adaptation component, which includes a temperature sensor (15) fixed to the end side of the telescopic measuring frame, with the detection end of the temperature sensor (15) facing the measurement area of the arc guide rail.
9. A detection device for facilitating distance measurement according to claim 8, characterized in that, The environmental adaptation component includes a pressure sensor (16), which is embedded inside the contact structure at the end of the retractable measuring frame.