Spherical normal measuring device

Abstract

The utility model relates to a spherical surface normal measuring device, which comprises a support (3); a mounting through hole is formed in the center of the upper surface of the support (3), and a first laser (1) and a second laser (2) are arranged in the mounting through hole; the first laser device (1) and the second laser device (2) are used for emitting single laser beams in the axis direction, and the emitting directions are opposite. A bubble level (4) is arranged on the upper surface of the support (3); the support (3) is provided with three supporting legs with the same length; and the supporting leg is provided with a sharp end part which is in contact with a to-be-detected part (5). According to the utility model, the normal direction of the spherical surface can be rapidly and accurately determined, the normal direction of the spherical surface is visually marked by using the laser, the use is convenient, and the measurement efficiency of the normal direction of the spherical surface is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aircraft test auxiliary tools, in particular to a spherical surface normal measurement device. Background Art

[0002] When performing strength tests on aircraft structures, it is necessary to perform impact or displacement deformation measurements on the required positions on the spherical structure. The direction of the impact or displacement deformation measurement is the spherical normal, so the spherical normal needs to be determined to arrange the impact equipment or displacement sensor.

[0003] The spherical structure includes the rear pressure frame and radar cover of the aircraft; the spherical normal means: if a straight line passing through the point is perpendicular to the tangent passing through the point, then the straight line is the normal of a point on the spherical surface.

[0004] Currently, the spherical normal measurement mainly adopts the manual visual method or sensor analysis method.

[0005] The artificial visual method adopts artificial visual measurement, and the positioning accuracy is poor;

[0006] The sensor analysis method requires taking a picture of the spherical surface or obtaining corresponding data through a sensor for analysis to determine the normal direction. The measurement process is complicated and the use cost is high.

[0007] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0008] In view of the defects existing in the prior art, the purpose of the utility model is to provide a spherical normal measurement device, which can quickly and accurately determine the spherical normal, and use a laser to intuitively visualize the spherical normal, which is easy to use and improves the measurement efficiency of the spherical normal.

[0009] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0010] A spherical surface normal measurement device, characterized by comprising:

[0011] Support 3;

[0012] A mounting through hole is centrally provided along the longitudinal axis of the support 3, and a first laser 1 and a second laser 2 are provided in the mounting through hole;

[0013] The first laser 1 and the second laser 2 are used to emit a single laser beam along an axis direction, and the emission directions are opposite;

[0014] A bubble level 4 is provided on the upper surface of the support 3;

[0015] The support 3 is provided with three legs of equal length;

[0016] The legs are provided with sharp ends for contacting the part 5 to be measured.

[0017] On the basis of the above technical solution, the support 3, the first laser 1 and the second laser 2 are arranged on a coaxial line.

[0018] On the basis of the above technical solution, the first laser 1 and the second laser 2 are respectively threadedly connected or clamped to the mounting through holes.

[0019] On the basis of the above technical solution, the first laser 1 and the second laser 2 share a power supply module, and the power supply module is threadedly connected or clamped to the mounting through hole.

[0020] On the basis of the above technical solution, the first laser 1 and the second laser 2 are respectively connected to the power supply module by threading or snapping.

[0021] Based on the above technical solution, the three legs are arranged at equal intervals.

[0022] Based on the above technical solution, the angles between the three legs and the axis of the laser are the same.

[0023] On the basis of the above technical solution, the legs are detachably connected to the support 3 via a connecting piece;

[0024] The connecting piece is provided with at least one group of blind holes having the same number as the supporting legs, the blind holes in the same group have the same depth and inclination angle, and the blind holes in different groups have the same or different depths and inclination angles.

[0025] On the basis of the above technical solution, the legs are legs of fixed length;

[0026] The supporting leg is provided with a reduced diameter portion, the reduced diameter portion is provided with a rotatable metal ring, and the metal ring is provided with an identification value which is the same as the length of the supporting leg.

[0027] On the basis of the above technical solution, the legs are segmented retractable legs.

[0028] The spherical surface normal measurement device described in the utility model can be used to determine the normal direction of a spherical surface structure, realizes accurate and rapid determination of the normal direction of the spherical surface structure, and has the following beneficial effects:

[0029] 1. The measuring device is fitted with the spherical surface through three legs of equal length and inclination, and the accurate measurement of the normal direction of the spherical surface is achieved by using the principle of intersection of two spherical surfaces, thereby improving the accuracy of normal direction measurement;

[0030] 2. The measuring device realizes the rapid marking of the normal direction by emitting a laser beam, which is simple and quick to operate and improves the test efficiency;

[0031] 3. The measuring device adopts dual lasers to improve the positioning accuracy and efficiency;

[0032] 4. The measuring device can intuitively and conveniently adjust the three legs through the bubble level to ensure that the lengths and inclination angles of the three legs are equal;

[0033] 5. The three legs can be removed when not in use, making the device easier to store and carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The utility model has the following drawings:

[0035] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation on the present invention.

[0036] Figure 1 A structural schematic diagram of a spherical normal measurement device described in the utility model.

[0037] Figure 2 Schematic diagram of the laser structure.

[0038] Figure 3 Schematic diagram of the support structure.

[0039] Reference numerals:

[0040] 1 is the first laser; 2 is the second laser; 3 is the support; 4 is the bubble level;

[0041] 5 is a part to be measured (eg, the surface of a spherical structure). DETAILED DESCRIPTION

[0042] The utility model is further described in detail below in conjunction with the accompanying drawings. The detailed description is a description made in conjunction with the exemplary embodiments of the utility model, including various details of the embodiments of the utility model to facilitate understanding, which should be considered as merely exemplary. Therefore, those skilled in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the utility model. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0043] like Figure 1 As shown, the utility model provides a spherical surface normal measurement device, which can be used to determine the impact or measurement normal of a spherical surface structure in an aircraft strength test, and includes:

[0044] Support 3; Figure 1In the illustrated embodiment, the support 3 is in the shape of an oblate cylinder as a whole, which is convenient for holding and for observing the laser emitted by the laser; the support 3 has an appropriate thickness so as to install the laser and the legs;

[0045] A mounting through hole (not marked in the figure) is centrally provided along the longitudinal axis of the support 3, and a first laser 1 and a second laser 2 are provided in the mounting through hole; Figure 1 In the illustrated embodiment, the mounting through hole is provided at the longitudinal axis of the support 3 which is in the shape of an oblate cylinder as a whole, and passes through the upper and lower surfaces of the support 3; illustratively, the mounting through hole may be a threaded hole;

[0046] The first laser 1 and the second laser 2 are used to emit a single laser beam along an axis direction, and the emission directions are opposite;

[0047] A bubble level 4 is provided on the upper surface of the support 3;

[0048] The support 3 is provided with three legs of equal length;

[0049] The legs are provided with sharp ends for contacting the part to be measured 5 , and the sharp ends form point contact with the part to be measured 5 , which can ensure a more accurate measurement result.

[0050] On the basis of the above technical solution, the support 3, the first laser 1 and the second laser 2 are arranged on a coaxial line.

[0051] On the basis of the above technical solution, the first laser 1 and the second laser 2 are respectively threadedly connected or clamped to the mounting through holes.

[0052] Based on the above technical solution, Figure 2 As shown, the first laser 1 and the second laser 2 share a power supply module, and the power supply module is threaded or clamped with the mounting through hole. Sharing a power supply module can reduce the size of the device, making it easier to carry and use.

[0053] Figure 2 In the illustrated embodiment, the first laser 1 is at the top, the second laser 2 is at the bottom, the power supply module is located therebetween, and the first laser 1 and the second laser 2 are respectively threadedly or snap-connected to the power supply module.

[0054] Exemplarily, the power supply module includes a first power supply submodule and a second power supply submodule, the first power supply submodule and the second power supply submodule are respectively provided with a battery compartment, the power supply contact of the first power supply submodule is arranged adjacent to the first laser 1, and is used to power the first laser 1, and the power supply contact of the second power supply submodule is arranged adjacent to the second laser 2, and is used to power the second laser 2.

[0055] Based on the above technical solution, the three legs are arranged at equal intervals.

[0056] Based on the above technical solution, the angles between the three legs and the axis of the laser are the same.

[0057] Exemplarily, the free ends of the three legs are inclined in a direction away from the axis of the laser, which can provide a more stable support force for the measuring device.

[0058] On the basis of the above technical solution, the legs are detachably connected to the support 3 via a connecting piece;

[0059] The connecting piece is provided with at least one group of blind holes having the same number as the supporting legs, and the blind holes have the same depth and inclination angle.

[0060] Exemplarily, the connecting member is provided with a group of blind holes having the same number as the supporting legs, and the total number of blind holes is three; exemplary, the connecting member is provided with two groups of blind holes having the same number as the supporting legs, and the total number of blind holes is six; the spacing between each group of blind holes and the axis of the laser is different, and appropriate blind holes can be selected as needed to install the supporting legs; exemplary, the depth and inclination angle of the blind holes in the same group are the same, and the depth and inclination angle of the blind holes in different groups are the same or different.

[0061] On the basis of the above technical solution, the legs are legs with fixed length.

[0062] Exemplarily, the leg is provided with a reduced diameter portion, the reduced diameter portion is provided with a rotatable metal ring, and the metal ring is provided with an identification value that is the same as the length of the leg.

[0063] On the basis of the above technical solution, the legs are segmented retractable legs.

[0064] Exemplarily, the legs are three-section retractable legs.

[0065] The spherical surface normal measurement device described in the utility model can be used in conjunction with an impact device and a displacement sensor to complete the work, and the working process is as follows:

[0066] First, place the spherical surface normal measurement device on a horizontal plane, use a bubble level to adjust and make sure that the lengths of the legs are equal and the inclinations are the same, and then place the spherical surface normal measurement device on the spherical surface and measure the spherical surface normal;

[0067] Place the measuring device on a horizontal surface and use the bubble level on the support to check whether the upper surface of the support is horizontal, thereby confirming that the three legs of the support are of equal length and have the same inclination angle relative to the central axis;

[0068] Before measuring, the required points can be marked on the spherical structure to be measured;

[0069] Place the measuring device on the spherical structure to be measured, with the three legs in contact with the surface of the structure;

[0070] Keep the three legs in contact with the spherical surface, and adjust the position of the measuring device so that the laser point emitted by the second laser 2 coincides with the marked point on the spherical structure;

[0071] The laser beam emitted by the first laser 1 is the spherical normal.

[0072] The impact device comprises a hollow cylinder, and the spherical normal indicated by the laser beam coincides with the axis of the hollow cylinder;

[0073] The displacement sensor is usually a wire displacement sensor, which has a hole for pulling out the wire. The laser beam is aligned with the hole for pulling out the wire to perform measurement.

[0074] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0075] The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiment. Any equivalent modifications or changes made by technical personnel in this field according to the content disclosed in the present invention should be included in the protection scope recorded in the claims.

Claims

1. A spherical normal measurement device, characterized in that: include: Support (3); A mounting through hole is centrally provided along the longitudinal axis of the support (3), and a first laser (1) and a second laser (2) are provided in the mounting through hole; The first laser (1) and the second laser (2) are used to emit a single laser beam along an axial direction, and the emission directions are opposite; A bubble level (4) is provided on the upper surface of the support (3); The support (3) is provided with three legs of equal length; The supporting leg is provided with a sharp end for contacting the part to be measured (5).

2. A spherical normal measurement device as claimed in claim 1, characterized in that: The support (3), the first laser (1) and the second laser (2) are arranged on a coaxial line.

3. A spherical normal measurement device as claimed in claim 1, characterized in that: The first laser (1) and the second laser (2) are respectively threadedly connected or clamped to the mounting through holes.

4. A spherical normal measurement device as claimed in claim 1, characterized in that: The first laser (1) and the second laser (2) share a power supply module, and the power supply module is threadedly connected or clamped to the mounting through hole.

5. A spherical normal measurement device as claimed in claim 4, characterized in that: The first laser (1) and the second laser (2) are respectively threadedly connected or snap-connected to the power supply module.

6. A spherical normal measurement device as claimed in claim 1, characterized in that: The three legs are arranged at equal intervals.

7. A spherical normal measurement device as claimed in claim 1, characterized in that: The three legs have the same included angle with the axis of the laser.

8. A spherical normal measurement device as claimed in claim 1, characterized in that: The supporting leg is detachably connected to the support (3) via a connecting piece; The connecting piece is provided with at least one group of blind holes having the same number as the supporting legs, the blind holes in the same group have the same depth and inclination angle, and the blind holes in different groups have the same or different depths and inclination angles.

9. A spherical normal measurement device as claimed in claim 8, characterized in that: The legs are legs of fixed length; The supporting leg is provided with a reduced diameter portion, the reduced diameter portion is provided with a rotatable metal ring, and the metal ring is provided with an identification value which is the same as the length of the supporting leg.

10. A spherical normal measurement device as claimed in claim 8, characterized in that: The supporting legs are segmented and retractable supporting legs.

Images