Measurement benchmark acquisition method, device, storage medium and equipment

Abstract

The embodiments of the present application disclose a method, apparatus, storage medium and equipment for obtaining a measurement benchmark, which relates to the field of digital measurement technology, including: determining a number of target benchmark points closest to each observation point from a set of optional benchmark points according to a preset observation point order of a number of observation points, so as to obtain a target benchmark point set including a number of benchmark points; obtaining a measurement tolerance according to the process tolerance of the observation point and the theoretical measurement error of the observation point; eliminating duplicate target benchmark points in the target benchmark point set to obtain a first target benchmark point set; obtaining a number of station establishment benchmark points in the first target benchmark point set according to the order in which the target benchmark points are added. The present application fully considers the process tolerance and measurement error, takes into account the comprehensive distance from each observation point to the benchmark point, and can adaptively select the benchmark point according to the tolerance size of the observation point, reduce the impact of the use environment on the benchmark point, and thus improve the measurement accuracy.

Description

Technical Field

[0001] The present application relates to the field of digital measurement technology, and in particular to a measurement reference acquisition method, apparatus, storage medium, and equipment. Background Art

[0002] The aviation manufacturing industry is constantly developing towards automation, digitalization and intelligence. Advanced digital measurement technology has been widely used in many links of the aircraft manufacturing process, playing an important role in monitoring and guiding the process.

[0003] In the use of most digital measuring equipment, it is necessary to establish the conversion relationship between coordinate systems by setting reference points in the tooling or workspace. Due to certain measurement errors in the measuring equipment and the fluctuation of the reference point's own position due to environmental changes, the accuracy of the obtained reference points is low and cannot meet the requirements of high-precision measurement. Summary of the Invention

[0004] The main purpose of this application is to provide a measurement benchmark acquisition method, device, storage medium and equipment, aiming to solve the problem in the prior art that the accuracy of benchmark points is low and cannot meet the requirements of high-precision measurement.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of the present application are as follows:

[0006] In a first aspect, an embodiment of the present application provides a method for obtaining a measurement reference, comprising the following steps:

[0007] According to a preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point are sequentially determined from the set of optional reference points to obtain a target reference point set including the plurality of reference points; wherein the preset observation point sequence is based on the order of measurement tolerances of the plurality of observation points from small to large, and the measurement tolerances are obtained based on the process tolerances of the observation points and the theoretical measurement errors of the observation points;

[0008] Eliminate duplicate target reference points in the target reference point set to obtain a first target reference point set;

[0009] A number of station building reference points are obtained in the first target reference point set according to the order in which the target reference points are added.

[0010] In a possible implementation of the first aspect, after obtaining a number of station establishment benchmarks in the first target benchmark point set according to the order in which the benchmarks were added, the measurement benchmark acquisition method further includes:

[0011] Determine whether the number of base points for building a website meets the requirements; if not, execute:

[0012] Obtain the sum of the distances from the observation point to the station reference point;

[0013] Determine whether the sum of the distances from any two observation points to the station reference point and their corresponding measurement tolerances meet the same size relationship;

[0014] According to the judgment result, the first website establishment reference point is obtained.

[0015] In a possible implementation of the first aspect, obtaining the first website establishment reference point according to the judgment result includes:

[0016] Based on the judgment result of yes, return to the preset observation point order according to the multiple observation points, and determine the multiple target reference points closest to each observation point from the optional reference point set in turn to obtain the target reference point set including the multiple reference points, until the judgment result of whether the number of station construction reference points meets the station construction requirements is yes, and the first station construction reference point is obtained.

[0017] In a possible implementation of the first aspect, obtaining the first website establishment reference point according to the judgment result includes:

[0018] According to the judgment result of "no", all adjacent observation point groups are obtained;

[0019] According to the order of the measurement tolerance of the observation points from small to large, the adjacent observation point groups are judged in turn to see whether the sum of the distances from the two observation points to the station reference point and their corresponding measurement tolerances meet the same size relationship, and the target adjacent observation point group is obtained; wherein, the target adjacent observation point group is the adjacent observation point group that does not meet the size relationship in the judgment process first;

[0020] Obtaining a first observation point according to the target adjacent observation point group; wherein the first observation point is an observation point with a small measurement tolerance in the target adjacent observation point group;

[0021] Add the benchmark point closest to the first observation point in the optional benchmark point set to the target benchmark point set, and return to the step of eliminating duplicate target benchmark points in the target benchmark point set to obtain the first target benchmark point set, until the judgment result of whether the number of station building benchmark points meets the station building requirements is yes, and the first station building benchmark point is obtained.

[0022] In a possible implementation of the first aspect, before determining, in sequence according to a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of selectable reference points to obtain a target reference point set including the plurality of reference points, the measurement reference acquisition method further includes:

[0023] Set benchmark points and observation points at the measurement site, and obtain the distance between the benchmark points and the observation points.

[0024] In a possible implementation of the first aspect, before determining, in sequence according to a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of selectable reference points to obtain a target reference point set including the plurality of reference points, the measurement reference acquisition method further includes:

[0025] The measurement tolerance is obtained based on the absolute value of the difference between the process tolerance of the observation point and the theoretical measurement error of the observation point.

[0026] In a possible implementation of the first aspect, before determining, in sequence according to a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of selectable reference points to obtain a target reference point set including the plurality of reference points, the measurement reference acquisition method further includes:

[0027] Assign values according to technical requirements to obtain the process tolerance of the observation point.

[0028] In a second aspect, an embodiment of the present application provides a measurement reference acquisition device, including:

[0029] A first obtaining module is configured to determine, in sequence from a set of selectable reference points, a number of target reference points closest to each observation point according to a preset observation point sequence of the plurality of observation points, so as to obtain a target reference point set including the plurality of reference points; wherein the preset observation point sequence is an ascending order of measurement tolerances of the plurality of observation points, the measurement tolerance being obtained based on a process tolerance of the observation point and a theoretical measurement error of the observation point;

[0030] A removal module is used to remove duplicate target reference points from the target reference point set to obtain a first target reference point set;

[0031] The second obtaining module is used to obtain a number of station building reference points in the first target reference point set according to the order in which the target reference points are added.

[0032] In a third aspect, an embodiment of the present application provides a computer-readable storage medium storing a computer program. When the computer program is loaded and executed by a processor, the measurement reference acquisition method provided in any one of the first aspects above is implemented.

[0033] In a fourth aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, wherein:

[0034] Memory is used to store computer programs;

[0035] The processor is used to load and execute a computer program so as to enable the electronic device to execute the measurement reference acquisition method provided in any one of the first aspects above.

[0036] Compared with the prior art, the present invention has the following advantages:

[0037] A measurement benchmark acquisition method, device, storage medium and equipment proposed in the embodiments of the present application include: according to a preset observation point order of several observation points, determining several target benchmark points closest to each observation point in turn from the optional benchmark point set to obtain a target benchmark point set including several benchmark points; wherein the preset observation point order is in an ascending order according to the measurement tolerance of the several observation points, and the measurement tolerance is obtained according to the process tolerance of the observation point and the theoretical measurement error of the observation point; eliminating repeated target benchmark points in the target benchmark point set to obtain a first target benchmark point set; and obtaining several station establishment benchmark points in the first target benchmark point set according to the order in which the target benchmark points are added. The method of the present application takes into account the inherent measurement errors and the process tolerances of the observation points, and according to the size of the measurement tolerances obtained by the two, adaptively obtains the target reference point closest to it from the optional reference points as the preliminary pre-selected point, removes duplicate points and retains unique values to match the station establishment conditions, and finally selects the target reference point according to the order in which the target reference points are added, that is, the measurement tolerance size of the regression observation points, and takes into account the comprehensive distance from each observation point to the pre-selected reference point, and screens and determines the most suitable reference point as the station establishment reference point, reducing the influence of the use environment on the accuracy of the reference point, thereby improving the accuracy of the station establishment measurement to meet the high-precision measurement requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of an electronic device in the hardware operating environment involved in an embodiment of the present application;

[0039] Figure 2 A flow chart of a method for obtaining a measurement reference according to an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the functional modules of the measurement reference acquisition device provided in an embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of the measurement site;

[0042] Markings in the figure: 101 - processor, 102 - communication bus, 103 - network interface, 104 - user interface, 105 - memory. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0044] The main solution of the embodiments of the present application is: to propose a measurement reference acquisition method, device, storage medium and equipment, including determining several target reference points closest to each observation point from the optional reference point set in turn according to the preset observation point order of several observation points, so as to obtain a target reference point set including several reference points; wherein the preset observation point order is in the order from small to large according to the measurement tolerance of the several observation points, and the measurement tolerance is obtained according to the process tolerance of the observation point and the theoretical measurement error of the observation point; duplicate target reference points in the target reference point set are eliminated to obtain a first target reference point set; and in the first target reference point set, several station establishment reference points are obtained according to the order in which the target reference points are added.

[0045] The aviation manufacturing industry is continuously developing towards automation, digitization, and intelligence. Advanced digital measurement technologies are widely used in many aspects of the aircraft manufacturing process, playing a vital role in monitoring and guiding the process. Among the numerous digital measurement devices, some, with their high measurement accuracy and convenient operation, have become representatives of advanced digital measurement methods in the aviation industry. Laser trackers, for example, are widely used in areas such as the assembly of large aircraft components. With the increasing demand for modern aircraft, the precision requirements for aircraft manufacturing are becoming increasingly stringent, which also poses new challenges to the use of trackers.

[0046] When using a laser tracker, a fiducial point set within the tooling or workspace is required to establish a transformation between the tracker's measurement coordinate system and the aircraft's theoretical coordinate system. Because the position of the fiducial points fluctuates due to environmental changes and the tracker itself exhibits measurement errors, this inevitably introduces errors during tracker station establishment. This error can cause additional interference in subsequent spatial point measurements by the tracker. For a long time, the selection of fiducial points for tracker station establishment has largely relied on the workspace envelope principle to improve tracker station establishment reliability. While this approach improves measurement results to a certain extent, it fails to comprehensively consider the manufacturing accuracy requirements at various locations within the product, making it difficult to guarantee measurement at locations with high precision. Currently, this frequently results in difficulties in adjusting the attitude of critical aircraft points during assembly of major aircraft components, sometimes even preventing them from achieving acceptable levels of adjustment. Therefore, a method is urgently needed to improve the accuracy of fiducial points and to rationally and effectively select them to meet high-precision measurement requirements and achieve high-quality, efficient aircraft assembly.

[0047] To this end, the present application provides a solution, by adding the reference points closest to the observation points from the optional reference point set to the target reference point set in order from small to large according to the measurement tolerance of the observation points; wherein the measurement tolerance is obtained according to the process tolerance of the observation point and the theoretical measurement error of the observation point; taking into account the process tolerance and the measurement error, the reference point positions are selected using an adaptive tolerance, the repeated target reference points in the target reference point set are eliminated, and the unique values are retained to meet the station establishment conditions, thereby obtaining a first target reference point set; in the first target reference point set, a number of station establishment reference points are obtained according to the order in which the reference points are added, taking into account the comprehensive distance from each observation point to the pre-selected reference point, reducing the influence of the use environment on the accuracy of the reference point positions, and gradually determining the most suitable reference point among the pre-selected points for station establishment, thereby improving the measurement accuracy.

[0048] Refer to the attached Figure 1 , attached Figure 1 This is a structural diagram of an electronic device of the hardware operating environment involved in the embodiment of the present application. The electronic device may include: a processor 101, such as a central processing unit (CPU), a communication bus 102, a user interface 104, a network interface 103, and a memory 105. Among them, the communication bus 102 is used to realize the connection and communication between these components. The user interface 104 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 104 may also include a standard wired interface and a wireless interface. The network interface 103 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (WIreless-FIdelity, WI-FI) interface). The memory 105 may optionally be a storage device independent of the aforementioned processor 101. The memory 105 may be a high-speed random access memory (RAM) memory, or a stable non-volatile memory (NVM), such as at least one disk memory. The processor 101 may be a general-purpose processor, including a central processing unit, a network processor, etc., or may be a digital signal processor, an application-specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component.

[0049] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation to the electronic device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0050] As attached Figure 1As shown, the memory 105 as a storage medium may include an operating system, a data storage module, a network communication module, a user interface module and an electronic program.

[0051] In the attached Figure 1 In the electronic device shown, the network interface 103 is mainly used for data communication with the network server; the user interface 104 is mainly used for data interaction with the user; the processor 101 and the memory 105 in this application can be set in the electronic device, and the electronic device calls the measurement reference acquisition device stored in the memory 105 through the processor 101, and executes the measurement reference acquisition method provided in the embodiment of this application.

[0052] Refer to the attached Figure 2 Based on the hardware device of the aforementioned embodiment, an embodiment of the present application provides a method for obtaining a measurement reference, comprising the following steps:

[0053] S10: According to a preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point are determined in turn from the optional reference point set to obtain a target reference point set including the plurality of reference points; wherein the preset observation point sequence is an ascending order of measurement tolerances of the plurality of observation points, and the measurement tolerance is obtained according to the process tolerance of the observation point and the theoretical measurement error of the observation point.

[0054] During the specific implementation process, in order to meet the needs of site construction, observation points and benchmark points will be set up at the measurement site, as shown in the attached Figure 4 In the measurement site shown, the white dots are reference points, the black dots are observation points, and all reference points constitute a set of optional reference points. That is, the purpose of this application is to select the reference points that are most suitable for the current working conditions from the existing optional reference points for station construction. The process tolerance is determined based on the aircraft assembly technology. The size and form and position tolerances of equipment and product parts are called process tolerances. The manufacturing department determines the process tolerance based on product design requirements and production conditions. This process is called tolerance allocation or tolerance design. The theoretical measurement error is related to the performance of the tracker itself and the actual layout position. It is related to both the fixed error value of the equipment and the distance from the observation point. Therefore, the measurement tolerance of the observation point is determined by comprehensively considering various factors, and the reference point closest to the observation point is added to the target reference point set in the order of tolerance from small to large. The target reference point is the reference point that has been preliminarily screened.

[0055] S20: Eliminate duplicate target reference points in the target reference point set to obtain a first target reference point set.

[0056] In the specific implementation process, since the same target reference point that meets the conditions may appear at different observation points when obtaining the target reference point set, and the station establishment does not require the introduction of repeated points, the repeated reference points will be extracted in this step, and the unique values will be retained. The set of target reference points after elimination will be used as the first target reference point set.

[0057] S30: Obtaining a number of station building reference points in the first target reference point set according to the order in which the target reference points are added.

[0058] During the specific implementation process, after determining the benchmark points required for the current station construction, the order in which the benchmark points are added will determine that the earlier the benchmark points are added, the closer the distance to the observation point, the smaller the tolerance, and the higher the accuracy. The benchmark points used for the final station construction, i.e., the station construction benchmark points, are obtained in order according to the number of benchmark points required for the station construction.

[0059] In this embodiment, the measurement tolerance is obtained based on the process tolerance and measurement distance of the observation point, and the target reference points with the closest distance and the smallest measurement error are obtained in sequence according to the size of the measurement tolerance. After retaining unique values and eliminating duplicate target reference points, the comprehensive distance from each observation point to the selected reference point is combined, and according to the order in which the reference points are added, the reference points that meet the needs of station establishment are obtained for station establishment. The selection of these reference points fully considers the process tolerance, that is, the aircraft manufacturing technology factor, and the theoretical measurement error, that is, the equipment's own performance and layout position factor, effectively reducing environmental interference. The target reference points are adaptively selected according to the tolerance of the observation point, so that the reference points can meet the needs of high-precision measurement.

[0060] In one embodiment, after obtaining a plurality of station establishment reference points in the first target reference point set according to the order in which the target reference points are added, the measurement reference acquisition method further includes:

[0061] Determine whether the number of base points for building a website meets the requirements; if not, execute:

[0062] Obtain the sum of the distances from the observation point to the station reference point;

[0063] Determine whether the sum of the distances from any two observation points to the station reference point and their corresponding measurement tolerances meet the same size relationship;

[0064] According to the judgment result, the first website establishment reference point is obtained.

[0065] In the specific implementation process, after obtaining a number of station building benchmarks, a post-processing step is added to determine whether the obtained station building benchmarks meet the required number of station building and take corresponding measures. If they meet the quantity requirements, a sufficient number of benchmarks can be selected; if not, after obtaining the distances from the observation point to all station building benchmarks, it is determined whether the sum of the distances from any two observation points to the station building benchmarks and their corresponding measurement tolerances meet the same size relationship. For example, if there is an observation point p i 、p j , i and j are both positive integers and are not equal to each other. The corresponding measurement tolerance is The sum of the distances to all the building reference points is γ i and γ j , to determine whether the same size relationship is satisfied, that is, if Then γ i ≤γ j . According to the result of the judgment, different means are taken to supplement the number of benchmarks to obtain the benchmarks that finally meet the quantity requirements, that is, the first station establishment benchmark. It should be noted that in the following two post-processing methods, the benchmarks that have been added to the first target benchmark set should be eliminated from the optional benchmarks. In simple terms, the number of benchmarks is fixed, the initial optional benchmark set includes all benchmarks, and the first target benchmark set is an empty set. Among them, for different judgment results, according to the judgment results, the steps for obtaining the first station establishment benchmark are as follows:

[0066] Based on the judgment result of yes, return to the preset observation point order according to the multiple observation points, and determine the multiple target reference points closest to each observation point from the optional reference point set in turn to obtain the target reference point set including the multiple reference points, until the judgment result of whether the number of station construction reference points meets the station construction requirements is yes, and the first station construction reference point is obtained.

[0067] During the specific implementation process, since any two points satisfy the relationship, indicating that the order of the distance and the tolerance is consistent, you can directly return to step S10 and use the method of this application to determine the station reference point again until the number of station reference points meets the station construction needs, then stop the loop and obtain the final first station reference point.

[0068] According to the judgment result of "no", all adjacent observation point groups are obtained;

[0069] According to the order of the measurement tolerance of the observation points from small to large, the adjacent observation point groups are judged in turn to see whether the sum of the distances from the two observation points to the station reference point and their corresponding measurement tolerances meet the same size relationship, and the target adjacent observation point group is obtained; wherein, the target adjacent observation point group is the adjacent observation point group that does not meet the size relationship in the judgment process first;

[0070] Obtaining a first observation point according to the target adjacent observation point group; wherein the first observation point is an observation point with a small measurement tolerance in the target adjacent observation point group;

[0071] Add the benchmark point closest to the first observation point in the optional benchmark point set to the target benchmark point set, and return to the step of eliminating duplicate target benchmark points in the target benchmark point set to obtain the first target benchmark point set, until the judgment result of whether the number of station building benchmark points meets the station building requirements is yes, and the first station building benchmark point is obtained.

[0072] In the specific implementation process, since not any two points satisfy the above relationship, two adjacent points are grouped together to determine whether the points satisfy the above relationship in turn, and the two observation points that first do not satisfy the above relationship in the judgment are found, which are the adjacent observation point group. Then, the observation point with a smaller measurement tolerance is obtained from the point group, and the reference point closest to the observation point is directly added to the target reference point set, and the process returns to step S20: the repeated target reference points in the target reference point set are eliminated to obtain the first target reference point set, until the number of station building reference points meets the station building needs, then the loop is stopped and the final first station building reference point is obtained.

[0073] In one embodiment, before determining, according to a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from the set of selectable reference points to obtain the target reference point set including the plurality of reference points, the measurement reference acquisition method further includes:

[0074] Set benchmark points and observation points at the measurement site, and obtain the distance between the benchmark points and the observation points.

[0075] During the specific implementation process, since the aircraft assembly site is relatively fixed, the deviation each time actually comes mostly from the layout of the tracker. The observation points and reference points can use the same set of standards. In order to increase the speed of obtaining the reference points, the distance between the reference points and the observation points can be obtained in advance so that it can be used directly when determining the reference points.

[0076] In one embodiment, before determining, according to a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from the set of selectable reference points to obtain the target reference point set including the plurality of reference points, the measurement reference acquisition method further includes:

[0077] The measurement tolerance is obtained based on the absolute value of the difference between the process tolerance of the observation point and the theoretical measurement error of the observation point.

[0078] In the specific implementation process, since the process tolerance is related to technology, it can be assigned in advance according to the technical requirements to obtain the process tolerance; the set of process tolerances can be expressed as:

[0079] δ={δ j |δ j =[x j ,y j ,z j ],j=1,2,3...,m},

[0080] The combination of theoretical measurement errors can be expressed as e M ={e Mj |e Mj =[x Mj ,y Mj ,z Mj ],j=1,2,3...,m}, the set of measurement tolerances can be expressed as in, and

[0081] Refer to the attached Figure 4 The measurement scenario of this application is described in detail:

[0082] According to the actual measurement site layout and the position of the tracker, observation points, and reference points, a 1:1 3D model is created in the 3D modeling software. Figure 4 As shown, the white points are reference points, which exist in the usage scenario, and the black points are observation points, which exist on the aircraft parts to be assembled. The reference point set is recorded as P = {P1, P2, P3…P i}, the set of observation points is recorded as p = {p1, p2, p3…pj}.

[0083] Get the distance from the observation point to the reference point, and record the distance from the observation point to the reference point as d ij (d ij ∈d), d ij represents the distance from the i-th reference point to the j-th observation point, d represents the set of distances, i = 1, 2, 3, ... n, j = 1, 2, 3, ... m. In this embodiment, n is 10 and m is 6.

[0084] The tracker in this embodiment is Leica AT960, and its theoretical measurement error is 15um+6um / m, that is, part of it is fixed error, and part of it is floating error related to the distance. Figure 4 Under the tracker station conditions shown, the theoretical measurement error set of the observation point is expressed as:

[0085] e M ={e Mj |e Mj =[x Mj ,y Mj ,z Mj ],j=1,2,3...,m}, where eMj =15um+(6×d j )um,d j Indicates the distance from the jth observation point to the tracker.

[0086] Define the set Γ as the set of optional reference points and Θ as the set of target reference points. Γ initially contains all elements of the reference point set P, and Θ is initially an empty set.

[0087] In the optional reference point set Γ, the reference points closest to the observation point are selected in order from small to large in terms of measurement tolerance, and added to the station establishment reference point set Θ.

[0088] Remove the repeatedly added reference points in the station building reference point set Θ and retain only unique values to obtain the updated station building reference point set Θ; remove the reference points added to Θ from the optional reference point set Γ to obtain the updated optional reference point set Γ.

[0089] The first N reference points are retained in the order in which they are added to the set Θ, and the loop is exited; if the number of reference points in the set Θ is less than N (N is the required number of reference points for station establishment), the reference points in the set Θ are retained. In this embodiment, N is 10.

[0090] Calculate the observation point p i The sum of the distances γ to the reference points in the station reference point set Θ i ,in, Where l represents the number of elements in the set Θ, p i is the observation point p i The theoretical coordinate value, b j is the theoretical coordinate value of the jth reference point in the set Θ.

[0091] Determine for any two observation points p i 、p j Corresponding measurement tolerance And the distance γ to the benchmark point in the station benchmark set Θ i and γ j , whether the following relationship is satisfied: If Then γ i ≤γ j .

[0092] If the aforementioned size relationship is satisfied, return to the step of adding reference points and repeat the loop; otherwise, determine whether the two adjacent observation points satisfy the aforementioned size relationship in order of the measurement tolerance of the observation points from small to large, find the observation point pair that does not satisfy the aforementioned size relationship first, and select the observation point p with the smaller measurement tolerance φ among the found point pairs. Add the reference point closest to the observation point p in the optional reference point set Γ to the station establishment reference point set Θ, and return to the aforementioned step of eliminating duplicate points to start the loop.

[0093] Ultimately, high-precision and adaptable benchmarks are obtained conveniently and efficiently for establishing high-precision measurement stations.

[0094] Refer to the attached Figure 3 Based on the same inventive concept as in the aforementioned embodiment, the embodiment of the present application further provides a measurement reference acquisition device, comprising:

[0095] A first obtaining module is configured to determine, in sequence from a set of selectable reference points, a number of target reference points closest to each observation point according to a preset observation point sequence of the plurality of observation points, so as to obtain a target reference point set including the plurality of reference points; wherein the preset observation point sequence is an ascending order of measurement tolerances of the plurality of observation points, the measurement tolerance being obtained based on a process tolerance of the observation point and a theoretical measurement error of the observation point;

[0096] A removal module is used to remove duplicate target reference points from the target reference point set to obtain a first target reference point set;

[0097] The second obtaining module is used to obtain a number of station building reference points in the first target reference point set according to the order in which the reference points are added.

[0098] Those skilled in the art should understand that the division of the various modules in the embodiment is merely a division of logical functions, and in actual application, they can be fully or partially integrated into one or more actual carriers, and these modules can all be implemented in the form of software called through a processing unit, or all be implemented in the form of hardware, or in the form of a combination of software and hardware. It should be noted that the modules in the measurement reference acquisition device in this embodiment correspond one-to-one to the steps in the measurement reference acquisition method in the aforementioned embodiment. Therefore, the specific implementation of this embodiment can refer to the implementation of the aforementioned measurement reference acquisition method, and will not be repeated here.

[0099] Based on the same inventive concept as in the aforementioned embodiment, an embodiment of the present application further provides a computer-readable storage medium storing a computer program. When the computer program is loaded and executed by a processor, the measurement reference acquisition method provided in the embodiment of the present application is implemented.

[0100] In addition, based on the same inventive concept as in the above embodiment, an embodiment of the present application further provides an electronic device, comprising at least a processor and a memory, wherein:

[0101] Memory is used to store computer programs;

[0102] The processor is used to load and execute a computer program so that the electronic device executes the measurement reference acquisition method provided in the embodiment of the present application.

[0103] In some embodiments, the computer-readable storage medium may be a memory device such as FRAM, ROM, PROM, EPROM, EEPROM, flash memory, magnetic surface mount memory, optical disk, or CD-ROM; or various devices including any one or any combination of the above memories. The computer may be various computing devices including smart terminals and servers.

[0104] In some embodiments, executable instructions may be in the form of a program, software, software module, script, or code, written in any form of programming language (including compiled or interpreted languages, or declarative or procedural languages), and may be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment.

[0105] As an example, executable instructions may, but need not, correspond to a file in a file system, may be stored as part of a file that stores other programs or data, such as in one or more scripts in a HyperText Markup Language (HTML) document, in a single file dedicated to the program in question, or in multiple coordinating files (e.g., files storing one or more modules, subroutines, or code portions).

[0106] By way of example, executable instructions may be deployed to be executed on one computing device, or on multiple computing devices at one site, or on multiple computing devices distributed across multiple sites and interconnected by a communication network.

[0107] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0108] The above sequence of the embodiments of the present application is for description only and does not represent the superiority or inferiority of the embodiments.

[0109] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as read-only memory / random access memory, magnetic disk, optical disk), and includes a number of instructions for enabling a multimedia terminal device (which can be a mobile phone, computer, television receiver, or network device, etc.) to execute the methods of each embodiment of the present application.

[0110] In summary, the present application provides a measurement reference acquisition method, device, storage medium and equipment, which determines several target reference points closest to each observation point from the optional reference point set in sequence according to the preset observation point order of several observation points, so as to obtain a target reference point set including several reference points; wherein the preset observation point order is the order from small to large according to the measurement tolerance of the several observation points, and the measurement tolerance is obtained according to the process tolerance of the observation point and the theoretical measurement error of the observation point; the repeated target reference points in the target reference point set are eliminated to obtain a first target reference point set; and in the first target reference point set, several station establishment reference points are obtained according to the order in which the target reference points are added. This application obtains the measurement tolerance based on the process tolerance and measurement distance of the observation point, and obtains the reference points with the closest distance and the smallest measurement error in sequence according to the size of the measurement tolerance. After retaining unique values and eliminating duplicate target reference points, the comprehensive distance from each observation point to the selected reference point is combined, and the station establishment reference points that meet the station establishment needs are obtained according to the order in which the reference points are added. The selection of these reference points fully considers the process tolerance, that is, the aircraft manufacturing technology factors, and the theoretical measurement error, that is, the equipment's own performance and layout position factors, effectively reducing environmental interference. The target reference points are adaptively selected according to the tolerance of the observation point, so that the reference points can meet the needs of high-precision measurement.

[0111] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A method for obtaining a measurement benchmark, characterized in that: The following steps are involved: According to a preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point are sequentially determined from a set of optional reference points to obtain a set of target reference points including the plurality of reference points; wherein the preset observation point sequence is an ascending order of measurement tolerances of the plurality of observation points, the measurement tolerances being obtained based on process tolerances of the observation points and theoretical measurement errors of the observation points; before sequentially determining, according to the preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of optional reference points to obtain a set of target reference points including the plurality of reference points, the measurement reference acquisition method further comprises: Obtaining the measurement tolerance according to the absolute value of the difference between the process tolerance of the observation point and the theoretical measurement error of the observation point; Eliminating duplicate target reference points in the target reference point set to obtain a first target reference point set; Obtaining a plurality of station establishment reference points in the first target reference point set according to the order in which the target reference points are added; after obtaining the plurality of station establishment reference points in the first target reference point set according to the order in which the reference points are added, the measurement reference acquisition method further includes: Determine whether the number of the site building reference points meets the site building requirements; if not, execute: Obtaining the sum of distances from the observation point to the station establishment reference point; Determine whether the sum of the distances from any two observation points to the station establishment reference point and their corresponding measurement tolerances satisfy the same size relationship; According to the judgment result, the first website establishment reference point is obtained.

2. The method for obtaining a measurement reference according to claim 1, wherein: The step of obtaining the first website establishment reference point according to the judgment result includes: According to the judgment result of yes, return to the preset observation point order based on several observation points, and determine several target reference points closest to each observation point from the optional reference point set in turn to obtain a target reference point set including several of the reference points, until the judgment result of whether the number of the station construction reference points meets the station construction requirements is yes, and the first station construction reference point is obtained.

3. The method for obtaining a measurement reference according to claim 1, wherein: The step of obtaining the first website establishment reference point according to the judgment result includes: According to the judgment result of "no", all adjacent observation point groups are obtained; According to the order of the measurement tolerances of the observation points from small to large, the adjacent observation point groups are sequentially judged to determine whether the sum of the distances from the two observation points to the station establishment reference point and the corresponding measurement tolerances satisfy the same size relationship, thereby obtaining a target adjacent observation point group; wherein the target adjacent observation point group is the adjacent observation point group that first does not satisfy the size relationship during the judgment process; Obtaining a first observation point according to the target adjacent observation point group; wherein the first observation point is the observation point with the smallest measurement tolerance in the target adjacent observation point group; Add the reference point closest to the first observation point in the optional reference point set to the target reference point set, and return to the step of eliminating the repeated target reference points in the target reference point set to obtain the first target reference point set, until the judgment result of whether the number of the station construction reference points meets the station construction requirements is yes, and the first station construction reference point is obtained.

4. The method for obtaining a measurement reference according to claim 1, wherein: Before determining, in accordance with a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of optional reference points to obtain a set of target reference points including the plurality of reference points, the measurement reference acquisition method further comprises: The reference point and the observation point are set at a measurement site, and the distance between the reference point and the observation point is obtained.

5. The method for obtaining a measurement reference according to claim 1, wherein: Before determining, in accordance with a preset observation point order of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of optional reference points to obtain a set of target reference points including the plurality of reference points, the measurement reference acquisition method further comprises: Assign values according to technical requirements to obtain the process tolerance of the observation point.

6. A measurement reference acquisition device, characterized in that: include: A first obtaining module is configured to determine, in sequence according to a preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of optional reference points, so as to obtain a target reference point set including the plurality of said reference points; wherein the preset observation point sequence is an ascending order of measurement tolerances of the plurality of observation points, the measurement tolerances being obtained based on process tolerances of the observation points and theoretical measurement errors of the observation points; and before determining, in sequence according to the preset observation point sequence of the plurality of observation points, a plurality of target reference points closest to each observation point from a set of optional reference points, so as to obtain a target reference point set including the plurality of said reference points, further comprising: Obtaining the measurement tolerance according to the absolute value of the difference between the process tolerance of the observation point and the theoretical measurement error of the observation point; a removal module, configured to remove duplicate target reference points from the target reference point set to obtain a first target reference point set; A second obtaining module is configured to obtain a plurality of station establishment reference points in the first target reference point set according to the order in which the target reference points are added; after obtaining the plurality of station establishment reference points in the first target reference point set according to the order in which the reference points are added, the module further includes: Determine whether the number of the site building reference points meets the site building requirements; if not, execute: Obtaining the sum of distances from the observation point to the station establishment reference point; Determine whether the sum of the distances from any two observation points to the station establishment reference point and their corresponding measurement tolerances satisfy the same size relationship; According to the judgment result, the first website establishment reference point is obtained.

7. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is loaded and executed by a processor, the measurement reference acquisition method according to any one of claims 1 to 5 is implemented.

8. An electronic device, characterized in that: comprising a processor and a memory, wherein: The memory is used to store computer programs; The processor is configured to load and execute the computer program so as to enable the electronic device to perform the measurement reference acquisition method according to any one of claims 1 to 5.

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