Measuring tools and measuring methods

Abstract

The present invention relates to a measuring tool, which comprises a first outer surface and a second outer surface, and a first inner surface and a second inner surface corresponding to the first outer surface and the second outer surface; wherein the first outer surface and the second outer surface form an "L" shape, at least a portion of the first inner surface is suitable for fitting the first surface of the inner hook of the C-type culvert of the test nacelle, at least a portion of the second inner surface is suitable for fitting the second surface of the inner hook, and the first outer surface is suitable for placing a target ball. The measuring tool can accurately measure the axial distance between the front end face of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

Description

Technical Field

[0001] The invention relates to the field of mechanical design, and in particular to a measuring tool and a measuring method. Background Art

[0002] Figure 1 This is a schematic diagram of the structure of the connection between the test nacelle and the test bench. At present, the widely used connection between the ground test nacelle and the test bench of aircraft engines is as follows: Figure 1 The test nacelle is composed of two halves of C-shaped culverts (i.e., C-shaped culvert 10a and C-shaped culvert 10b) with the same functions and similar structures, and two pairs of double ears (not marked) at the upper end of each half of the C-shaped culvert are connected to two single ears (not marked) of the test stand 20 by bolts (not marked).

[0003] Figure 2 It is a structural diagram of a test nacelle C-type culvert. Figure 3 It is a test nacelle C-type culvert (along Figure 2 Schematic diagram of the cross section in the AA direction. Figure 4 It is a test nacelle C-type culvert ( Figure 3 Schematic diagram of the outer hook and inner hook after the M area is enlarged. Figures 2 to 4 As shown, the front section of each half C-type culvert is buckled with the engine. In order to ensure that the C-type culvert can be buckled with the engine smoothly, the axial distance L between the front end face 11a of the outer hook 11 of the C-type culvert and the edge 12a of the inner hook 12 needs to meet the design value requirements. Therefore, the axial distance needs to be accurately measured.

[0004] When measuring the axial distance L between the front end face 11a of the outer hook 11 and the edge 12a of the inner hook 12 of the C-type culvert, it is not easy to measure the edge of the inner hook using conventional measuring tools such as calipers due to structural and space limitations. When measuring using a laser tracker, the normal direction of the target ball on the edge 12a of the inner hook 12 is uncertain, so it is impossible to accurately locate it, and thus it is impossible to accurately measure the axial distance L between the front end face 11a of the outer hook 11 and the edge 12a of the inner hook 12. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a measuring tool, which can accurately measure the axial distance between the front end surface of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is to provide a measuring tool, which includes a first outer surface and a second outer surface, and a first inner surface and a second inner surface corresponding to the first outer surface and the second outer surface; wherein, the first outer surface and the second outer surface form an "L" shape, at least a portion of the first inner surface is suitable for fitting the first surface of the inner hook of the C-type culvert of the test nacelle, at least a portion of the second inner surface is suitable for fitting the second surface of the inner hook, and the first outer surface is suitable for placing a target ball.

[0007] In one embodiment of the present invention, at least a portion of the first outer surface is a concave surface, and the concave surface is suitable for placing the target ball.

[0008] In one embodiment of the present invention, the first outer surface is in a vertical direction.

[0009] In one embodiment of the present invention, a plurality of grooves are disposed on the second inner surface.

[0010] In one embodiment of the present invention, the target sphere is suitable for reflecting the light beam emitted by the laser tracker.

[0011] Another aspect of the present invention provides a measurement method using the measuring tool as described in claim 1, comprising the following steps: a. placing the measuring tool on the inner hook so that at least a portion of the first inner surface fits the first surface, and at least a portion of the second inner surface fits the second surface; b. placing the target ball on the first outer surface; c. taking the front end face of the outer hook of the test nacelle C-type culvert as the reference plane, measuring the axial distance L1 between the center of the target ball and the front end face of the outer hook; d. calculating the axial distance L between the front end face of the outer hook and the edge of the inner hook; wherein, L=L1+L2, L2 is the axial distance between the center of the target ball and the edge of the inner hook.

[0012] In one embodiment of the present invention, at least a portion of the first outer surface is a concave surface, and in step b, the target ball is placed on the concave surface.

[0013] In one embodiment of the present invention, the first outer surface is in a vertical direction.

[0014] In one embodiment of the present invention, a plurality of grooves are disposed on the second inner surface.

[0015] In one embodiment of the present invention, the target sphere is suitable for reflecting the light beam emitted by the laser tracker.

[0016] Due to the adoption of the above technical solution, the present invention has the following significant advantages compared with the prior art:

[0017] The measuring tool of the present invention makes at least a portion of the first inner surface fit the first surface of the inner hook of the C-type culvert of the test nacelle, at least a portion of the second inner surface fits the second surface of the inner hook, and a target ball is placed on the first outer surface, which effectively solves the problem that it is difficult to measure the edge of the inner hook using conventional measuring tools such as calipers due to structural and space limitations, and the target ball cannot be accurately positioned on the edge of the inner hook when measuring using a laser tracker. The measuring tool can accurately measure the axial distance between the front end face of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 It is a structural schematic diagram of the connection between the test nacelle and the test bench;

[0020] Figure 2 It is a structural schematic diagram of a test nacelle C-type culvert;

[0021] Figure 3 It is a cross-sectional schematic diagram of a C-type culvert of a test nacelle;

[0022] Figure 4 It is a schematic diagram of the outer hook and inner hook of the C-type culvert of a test nacelle;

[0023] Figure 5 is a side view of a measuring tool according to an embodiment of the present invention;

[0024] Figure 6 and Figure 7 It is a structural schematic diagram of a measuring tool according to an embodiment of the present invention;

[0025] Figure 8 and Fig. 9 is a schematic diagram of an implementation environment of a measuring tool according to an embodiment of the present invention;

[0026] Fig.10 It is a flow chart of a measurement method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] As shown in this application and claims, unless the context clearly indicates an exception, the words "a", "an", "an" and / or "the" do not refer to the singular and may also include the plural. Generally speaking, the terms "include" and "comprise" only indicate the inclusion of the steps and elements that have been clearly identified, and these steps and elements do not constitute an exclusive list. The method or device may also include other steps or elements.

[0030] When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional views showing the device structure will not be partially enlarged according to the general scale, and the schematic views are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] For ease of description, spatial relationship words such as "under", "below", "below", "below", "above", "on", etc. may be used here to describe the relationship between one element or feature shown in the drawings and other elements or features. It will be understood that these spatial relationship words are intended to include other directions of the device in use or operation in addition to the direction depicted in the drawings. For example, if the device in the drawings is turned over, the direction of the element described as being "under" or "under" or "below" other elements or features will be changed to "above" the other elements or features. Thus, the exemplary words "under" and "below" can include both the up and down directions. The device may also have other orientations (rotated 90 degrees or in other orientations), so the spatial relationship descriptors used here should be interpreted accordingly. In addition, it will be understood that when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or there can be one or more layers in between.

[0032] In the context of the present application, a structure in which a first feature is described as being "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which an additional feature is formed between the first and second features, such that the first and second features may not be in direct contact.

[0033] It should be understood that when a component is referred to as being “on another component,” “connected to another component,” “coupled to another component,” or “contacting another component,” it can be directly on, connected to, coupled to, or contacting the other component, or intervening components may be present. In contrast, when a component is referred to as being “directly on another component,” “directly connected to,” “directly coupled to,” or “directly contacting” another component, there are no intervening components present.

[0034] The following embodiment of the present invention provides a measuring tool, which can accurately measure the axial distance between the front end surface of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

[0035] Figure 5 It is a side view of a measuring tool according to an embodiment of the present invention. Figure 6 and Figure 7 It is a structural schematic diagram of a measuring tool according to an embodiment of the present invention.

[0036] Combine the following Figures 5 to 7 The measuring tool 100 is described. It is understood that the following description is only exemplary, and those skilled in the art may make various changes without departing from the spirit of the present invention.

[0037] refer to Figure 5 As shown, the measuring tool 100 includes a first outer surface 110 and a second outer surface 120 , and a first inner surface 130 and a second inner surface 140 corresponding to the first outer surface 110 and the second outer surface 120 .

[0038] Among them, the first outer surface 110 and the second outer surface 120 form an "L" shape, at least a portion of the first inner surface 130 is suitable for fitting the first surface 12b of the inner hook 12 of the C-type culvert of the test nacelle, at least a portion of the second inner surface 140 is suitable for fitting the second surface 12c of the inner hook 12, and the first outer surface 110 is suitable for placing the target ball 200.

[0039] It should be noted that the first inner surface 130 may also include a plurality of first sub-inner surfaces (not shown). For example, one or more first sub-inner surfaces in the first inner surface 130 may be suitable for fitting with the first surface 12b of the inner hook 12, or all first sub-inner surfaces in the first inner surface 130 may be suitable for fitting with the first surface 12b of the inner hook 12. Those skilled in the art may make corresponding adjustments according to actual needs, and the present invention is not limited thereto.

[0040] Since there may be a processing error on the first surface 12 b of the inner hook 12 , the tightness of the fit can be effectively improved by reducing the contact area between the first inner surface 130 of the measuring tool 100 and the first surface 12 b of the inner hook 12 .

[0041] refer to Figure 5 and Figure 6 As shown, in one embodiment of the present invention, at least a portion of the first outer surface 110 is a concave surface 110a, and the concave surface 110a is suitable for placing a target ball (such as the target ball 200). The concave surface 110a can solve the problem that the target ball cannot be accurately positioned at the edge 12a of the inner hook 12.

[0042] Preferably, the shape of the concave surface 110a may correspond to or match the shape of the target ball, so as to better place the target ball. The present invention does not limit the specific shape of the concave surface 110a.

[0043] In one embodiment of the present invention, the direction of the first outer surface 110 is a vertical direction, so as to effectively solve the normal uncertainty problem when the target ball is directly placed on the edge 12 a of the inner hook 12 .

[0044] It can be understood that when the first outer surface 110 is in a vertical direction, the concave surface 110 a on the first outer surface 110 is still an optional embodiment.

[0045] refer to Figure 6 and Figure 7 As shown, in one embodiment of the present invention, a plurality of grooves 140 a are defined on the second inner surface 140 .

[0046] Since there may be processing errors on the second surface 12c of the inner hook 12, by providing a plurality of grooves 140a on the second inner surface 140, the amount of fit between the second inner surface 140 and the second surface 12c of the inner hook 12 can be reduced, making the fit more complete, tight and better.

[0047] In one embodiment of the present invention, a target sphere (such as target sphere 200 ) is suitable for reflecting a light beam emitted by a laser tracker (not shown).

[0048] Figure 8 and Fig. 9 Schematic diagram of an implementation environment of a measuring tool according to an embodiment of the present invention. Fig. 9 yes Figure 8 A magnified schematic diagram of the N region. Figure 8 and Fig. 9 As shown, by placing the measuring tool 100 on the inner hook 12 of the C-type culvert of the test nacelle, and making at least a portion of the first inner surface 130 fit the first surface 12b, and at least a portion of the second inner surface 140 fit the second surface 12c, the problem that the target ball cannot be accurately positioned at the edge 12a of the inner hook 12 can be solved, and the axial / dimensional distance between the front end surface 11a of the outer hook 11 and the edge 12a of the inner hook 12 can be accurately measured. The measuring tool 100 has a simple structure and low cost.

[0049] The above embodiments of the present invention provide a measuring tool, which can accurately measure the axial distance between the front end surface of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

[0050] Another aspect of the present invention provides a measurement method, which can accurately measure the axial distance between the front end surface of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

[0051] The measurement method of the present invention uses Figures 5 to 9 The measuring tool 100 shown in the figure includes the following steps: a. placing the measuring tool on the inner hook so that at least a portion of the first inner surface fits the first surface, and at least a portion of the second inner surface fits the second surface; b. placing the target ball on the first outer surface; c. taking the front end face of the outer hook of the test nacelle C-type culvert as the reference plane, measuring the axial distance L1 between the center of the target ball and the front end face of the outer hook; d. calculating the axial distance L between the front end face of the outer hook and the edge of the inner hook; wherein L=L1+L2, L2 is the axial distance between the center of the target ball and the edge of the inner hook.

[0052] Fig.10 This is a flow chart of a measurement method according to an embodiment of the present invention. Figures 5 to 10 It is to be understood that the following description is merely exemplary, and those skilled in the art may make various changes without departing from the spirit of the present invention.

[0053] It should be noted that this measurement method can be achieved by e.g. Figures 5 to 9 The present invention is implemented by the measuring tool 100 shown or its variations, but the present invention is not limited thereto.

[0054] Step S10 , placing the measuring tool 100 on the inner hook 12 , so that at least a portion of the first inner surface 130 of the measuring tool 100 fits the first surface 12 b of the inner hook 12 , and at least a portion of the second inner surface 140 of the measuring tool 100 fits the second surface 12 c of the inner hook 12 .

[0055] refer to Figure 6 and Figure 7 As shown, in one embodiment of the present invention, a plurality of grooves 140 a are defined on the second inner surface 140 .

[0056] Since there may be processing errors on the second surface 12c of the inner hook 12, by providing a plurality of grooves 140a on the second inner surface 140, the amount of fit between the second inner surface 140 and the second surface 12c of the inner hook 12 can be reduced, making the fit more complete, tight and better.

[0057] Step S20 : ​​placing a target ball (eg, target ball 200 ) on the first outer surface 110 of the measuring tool 100 .

[0058] For example, the target ball can be placed on the first outer surface 110 of the measuring tool 100 in a handheld manner, but the present invention is not limited thereto.

[0059] In one embodiment of the present invention, at least a portion of the first outer surface 110 is a concave surface 110 a . In this step, a target ball (eg, the target ball 200 ) may be placed on the concave surface 110 a of the first outer surface 110 .

[0060] The concave surface 110 a can solve the problem that the target ball cannot be accurately positioned at the edge 12 a of the inner hook 12 .

[0061] Preferably, the shape of the concave surface 110a may correspond to or match the shape of the target ball, so as to better place the target ball. The present invention does not limit the specific shape of the concave surface 110a.

[0062] In one embodiment of the present invention, the direction of the first outer surface 110 is a vertical direction, so as to effectively solve the normal uncertainty problem when the target ball is directly placed on the edge 12 a of the inner hook 12 .

[0063] It can be understood that when the first outer surface 110 is in a vertical direction, the concave surface 110 a on the first outer surface 110 is still an optional embodiment.

[0064] In one embodiment of the present invention, a target sphere (such as target sphere 200 ) is suitable for reflecting a light beam emitted by a laser tracker (not shown).

[0065] refer to Figure 8 and Fig. 9 As shown, by placing the measuring tool 100 on the inner hook 12 of the C-type culvert of the test nacelle, and making at least a portion of the first inner surface 130 fit the first surface 12b, and at least a portion of the second inner surface 140 fits the second surface 12c, the problem that the target ball cannot be accurately positioned at the edge 12a of the inner hook 12 can be solved.

[0066] Step S30 , taking the front end surface 11 a of the outer hook 11 of the test nacelle C-type culvert as a reference plane, measuring the axial distance L1 between the center of the target sphere (eg, the target sphere 200 ) and the front end surface 11 a of the outer hook 11 .

[0067] In some examples, the target ball may be first placed on the front end surface 11 a of the outer hook 11 , and a laser tracker may be used to measure the distance to the front end surface 11 a of the outer hook 11 , so that the front end surface 11 a is used as a reference plane.

[0068] For example, a laser tracker may be used to measure the axial distance / size L1 between the center of the target sphere (eg, the target sphere 200 ) and the front end surface 11 a of the outer hook 11 .

[0069] Step S40 , calculating the axial distance L between the front end surface 11a of the outer hook 11 and the edge 12a of the inner hook 12 , where L=L1+L2, and L2 is the axial distance between the center of the target ball (eg, the target ball 200 ) and the edge 12a of the inner hook 12 .

[0070] After obtaining the axial distance L1 between the center of the target ball (e.g., target ball 200) and the front end face 11a of the outer hook 11 in step S30, the axial distance L2 from the center of the upper target ball (e.g., target ball 200) to the edge 12a of the inner hook 12 is compensated, and the axial / dimensional distance L between the front end face 11a of the outer hook 11 and the edge 12a of the inner hook 12 can be obtained.

[0071] Preferably, when the measuring tool 100 and the target sphere 200 are determined, the axial distance L2 from the center of the target sphere (eg, the target sphere 200 ) to the edge 12 a of the inner hook 12 is known.

[0072] Thus, by placing the measuring tool 100 on the inner hook 12 of the C-type culvert of the test nacelle, the axial distance L between the front end face 11a of the outer hook 11 and the edge 12a of the inner hook 12 can be indirectly measured. The measuring method is simple to operate and has accurate results.

[0073] It should be noted that the Fig.10 The flowchart shown in the figure is used to illustrate the steps / operations performed by the measurement method according to the embodiment of the present application. It is understood that these steps / operations are not necessarily performed precisely in order. On the contrary, various steps / operations can be processed in reverse order or simultaneously. At the same time, other steps / operations can be added to these processes, or one or more steps / operations can be removed from these processes.

[0074] For other implementation details of the measurement method of this embodiment, please refer to Figures 5 to 9 The described embodiments will not be expanded here. Those skilled in the art can make appropriate adjustments to the priority order of the specific operation steps of the measurement method according to actual needs, and the present invention is not limited thereto.

[0075] The above embodiment of the present invention proposes a measurement method, which can accurately measure the axial distance between the front end surface of the outer hook of the C-type culvert of the test nacelle and the edge of the inner hook.

[0076] It is understood that although some embodiments of the invention currently considered useful are discussed through various examples in the above disclosure, it should be understood that such details are for illustrative purposes only, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and any combination of equivalents that are consistent with the essence and scope of the embodiments of the present application.

[0077] The basic concepts have been described above. Obviously, for those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0078] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0079] In addition, unless explicitly stated in the claims, the order of the processing elements and sequences described in the present application, the use of alphanumeric characters, or the use of other names are not suitable for limiting the order of the processes and methods of the present application. Although the above disclosure discusses some invention embodiments currently considered useful through various examples, it should be understood that such details are only for illustrative purposes, and the attached claims are not limited to the disclosed embodiments. On the contrary, the claims are intended to cover all modifications and equivalent combinations that are consistent with the essence and scope of the embodiments of the present application. For example, although the system components described above can be implemented by hardware devices, they can also be implemented only by software solutions, such as installing the described system on an existing server or mobile device.

[0080] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0081] In some embodiments, numbers describing the number of components and attributes are used. It should be understood that such numbers suitable for describing the embodiments are modified by the modifiers "about", "approximately" or "substantially" in some examples. Unless otherwise specified, "about", "approximately" or "substantially" indicate that the numbers are allowed to vary by ±20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximate values, which may change according to the required features of individual embodiments. In some embodiments, the numerical parameters should take into account the specified significant digits and adopt the general method of retaining digits. Although the numerical domains and parameters suitable for confirming the breadth of their range in some embodiments of the present application are approximate values, in specific embodiments, the setting of such numerical values ​​is as accurate as possible within the feasible range.

[0082] Although the present invention has been described with reference to the current specific embodiments, a person skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and various equivalent changes or substitutions may be made without departing from the spirit of the present invention. Therefore, any changes or modifications to the above embodiments within the spirit of the present invention will fall within the scope of the claims of this application.

Claims

1. A measuring method for a measuring tool, the measuring tool comprising a first outer surface and a second outer surface, and a first inner surface and a second inner surface corresponding to the first outer surface and the second outer surface; wherein: The first outer surface and the second outer surface form an "L" shape, at least a portion of the first inner surface is suitable for fitting with the first surface of the inner hook of the C-type culvert of the test nacelle, at least a portion of the second inner surface is suitable for fitting with the second surface of the inner hook, and the first outer surface is suitable for placing a target ball; The measuring method comprises the following steps: a. placing the measuring tool on the inner hook so that at least a portion of the first inner surface is in contact with the first surface, and at least a portion of the second inner surface is in contact with the second surface; b. placing the target ball on the first outer surface; c. Taking the front end surface of the outer hook of the C-type culvert of the test nacelle as the reference plane, measure the axial distance L1 between the center of the target sphere and the front end surface of the outer hook; d. Calculate the axial distance L between the front end surface of the outer hook and the edge of the inner hook; Wherein, L=L1+L2, L2 is the axial distance between the center of the target ball and the edge of the inner hook.

2. The measuring method according to claim 1, characterized in that: At least a portion of the first outer surface is a concave surface, and the concave surface is suitable for placing the target ball.

3. The measuring method according to claim 1, characterized in that: The first outer surface is in a vertical direction.

4. The measuring method according to claim 1, characterized in that: A plurality of grooves are disposed on the second inner surface.

5. The measuring method according to claim 1, characterized in that: The target sphere is suitable for reflecting the light beam emitted by the laser tracker.

6. The measuring method according to claim 1, characterized in that: At least a portion of the first outer surface is a concave surface, and in step b, the target ball is placed on the concave surface.

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