CN112395257A - Lightweight CAD (computer-aided design) model service method and system - Google Patents
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Abstract
One embodiment of the invention discloses a CAD model lightweight service method and a system, wherein the device comprises the following components: the browser-side model browsing module is used for reading and browsing lightweight files; the light-weight conversion management service module is used for managing light-weight conversion tasks, and updating and feeding back the running state of each task; the light-weight converter is used for converting CAD files in different formats into light-weight files; and the parallel scheduling module is used for scheduling a plurality of running lightweight converters.
Description
Technical Field
The invention relates to the field of model data processing. And more particularly, to a CAD model lightweight service method and system.
Background
Since the product design verification in the digital space has the advantages of high speed and low cost, the digital space is iterated for multiple times and the physical space is realized for one time, and the method is gradually becoming a new mode for developing complex products. In the digital space, complex products are commonly expressed based on a construction model, a functional model, and a performance model. The three-dimensional CAD model (construction model) has extremely large data volume, the order of magnitude of a triangular patch contained in the model can reach 106-10 orders of magnitude, and the data volume of a full-scale high-precision numerical simulation CAE model (performance model) can usually reach GB order of magnitude. How to improve the transfer, loading and visualization efficiency of the super-large-scale CAD/CAE model becomes a bottleneck problem restricting the collaborative research and development of complex products.
Most of the existing model lightweight systems adopt a method combining model simplification and model geometric data compression, and have the following disadvantages: (1) aiming at the light weight of a CAD model of a complex product, the original assembly tree information and PMI marking information cannot be kept in the process of model format conversion and model simplification. (2) The data volume of the model of the complex product is extremely large (can reach hundred million order of magnitude patches), the model data compression ratio of the existing system is low, and the actual application requirements are difficult to meet. (3) Most of the existing model lightweight systems are based on local, and the model lightweight efficiency is not high.
Disclosure of Invention
In view of this, a first embodiment of the present invention provides a CAD model lightweight service device, including:
the browser-side model browsing module is used for reading and browsing lightweight files;
the light-weight conversion management service module is used for managing light-weight conversion tasks, and updating and feeding back the running state of each task;
the light-weight converter is used for converting CAD files in different formats into light-weight files;
and the parallel scheduling module is used for scheduling a plurality of running lightweight converters.
In a specific embodiment, the parallel scheduling module includes:
the monitoring module is used for monitoring the running state of each light-weight converter in real time;
the distribution module is used for sending different tasks to different lightweight converters according to the running state;
and the judging module is used for judging whether the time for the lightweight converter to execute the conversion task exceeds a preset threshold value.
A second embodiment of the present invention provides a CAD model lightweight service system, including:
a CAD model lightweight service device;
the client is used for sending the CAD file to be converted uploaded by the user to the collaborative application service platform;
the collaborative application service platform is used for storing the CAD file to be converted into a file server and sending a conversion instruction to the CAD model lightweight service equipment;
and the file server is used for storing the CAD files to be converted and the CAD files which are uploaded by the user and are converted.
In a specific embodiment, the collaborative application service platform includes:
the query module is used for querying whether the parallel scheduling module sends a prompt that the time for converting the tasks exceeds a preset threshold value;
a marking module: the model is used for marking the model of which the conversion time does not exceed a preset threshold value;
and the previewing module is used for previewing the marked model.
A third embodiment of the present invention provides a CAD model lightweight service method,
the client uploads a CAD file to be transferred based on the operation of a user;
the cooperative application service platform receives the CAD file to be transferred, stores the CAD file to a file server, and sends a transfer instruction to the lightweight conversion management service module;
the parallel scheduling module acquires a gear shifting instruction from the lightweight conversion management service module, and then a gear shifting task is allocated to the lightweight converter in an idle state;
the lightweight converter acquires a CAD model to be converted from the file server, performs model lightweight processing to generate a lightweight model file, and stores the lightweight model file in the file server;
and the browser-side model browsing module browses the files in the file server based on the operation of the user.
In a specific embodiment, after the parallel scheduling module allocates the shift task to the light-weight converters in the idle state, the parallel scheduling module monitors the operation states of the light-weight converters in real time, feeds the acquired operation states of the tasks back to the light-weight conversion management service module, and the light-weight conversion management service module sends the operation states of the tasks to the collaborative application service platform;
in a specific embodiment, the parallel scheduling module monitors the running time of each light-weight converter in real time, and judges the running state of each light-weight converter according to the running time;
if the completion time of converting the file by the converter is less than or equal to a preset time threshold value, marking the file as being converted;
and if the completion time of converting the file by the converter exceeds a preset time threshold, finishing the conversion and marking as conversion failure.
In a specific embodiment, the preset time threshold is positively correlated with the size and complexity of the CAD file to be converted.
A fourth embodiment of the present invention provides a computer device, comprising a processor and a memory storing a computer program, wherein the processor implements the method of any one of the third embodiments when executing the computer program.
A fifth embodiment of the invention provides a computer-readable storage medium having a computer program stored thereon, wherein the program, when executed by a processor, implements the method of any of the third embodiments.
The invention has the following beneficial effects:
the invention designs a CAD model lightweight service system for collaborative research and development, supports lossless transmission of complex product model assembly tree hierarchical information in a preprocessing process, and solves the problem that the assembly tree information is lost by a traditional lightweight method. According to the self-adaptive model patch simplification method based on patch density, a proper simplification ratio is selected according to potential contribution of a model to a drawing result, and the storage space occupation of the model is reduced on the premise of meeting error requirements by combining a model data compression algorithm designed in the text. The compression ratio before and after the model compression reaches more than 10, and the storage space occupation of the model is greatly reduced through the model compression treatment. Experiments prove that the lightweight service deployment architecture has high processing efficiency and good expandability, and can meet the requirement of collaborative development of complex products.
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In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows an architecture diagram of a CAD model lightweight service system according to an embodiment of the present invention.
Fig. 2 is a flowchart illustrating a CAD model lightweight service method according to an embodiment of the present invention.
Fig. 3 shows a schematic structural diagram of a computer device according to another embodiment of the present invention.
Detailed Description
In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 1, an embodiment of the present invention provides a CAD model lightweight service system, including: the system comprises a CAD model lightweight service device 10, a client 11, a collaborative application service platform 13 and a file server 15.
The CAD model lightweight service device 10 includes a browser-side model browsing module 101, a lightweight conversion management service module 103, a lightweight converter 105, and a parallel scheduling module 107.
The browser-side model browsing module 101 is configured to read and browse a lightweight file, where the functions of the browser-side model browsing module include: loading and displaying a lightweight model; view switching function: comprises a top view, a bottom view, a left view, a right view, an upper view, a lower view and an ISO view; ViewCube function; the assembly tree function: for the assembly body model, checking of an assembly tree is supported, specific parts can be displayed and hidden through the assembly tree, and parts can be selected through the assembly tree; part selection function: clicking the selected part, highlighting, and synchronously assembling trees; a grading explosion function; dynamic sectioning function: the hexahedron dynamic sectioning is supported, and the sectioning line display is supported; and (4) query function: the type and the related information of the curve can be inquired, and labels are added; measurement function: the measurement type is automatically identified by selecting points or curves, and linear marking, angle marking and radius marking are supported; the part dragging and restoring function; a perspective view and orthogonal view switching function; unit switching function, display mode switching function: the functions are realized based on a mode of browsing a webpage through a browser, and a user can directly load and use the webpage through the browser without installing other application software.
The lightweight conversion management service module 103 is used for managing lightweight conversion tasks, and updating and feeding back the running state of each task;
the lightweight conversion management service module is in butt joint with the collaborative application service platform, the collaborative research and development platform adds conversion tasks to the conversion management service module, the conversion management service module updates and feeds back the running state of each task in a message queue mode, and the collaborative research and development platform can acquire the state of each task by polling the message queue. In addition, the conversion management service module needs to be configured on one server, and may be any server such as a real host, a cloud host, or a virtual machine, and is not limited herein.
A lightweight converter 107 for converting CAD files of different formats into lightweight files;
the lightweight converters are in butt joint with the lightweight conversion management service, and only one CAD file can be converted by one converter at the same time, so that a plurality of converters can be configured and run simultaneously to improve the conversion efficiency. Formats that can convert CAD files include: CatiaPro/E or Cero; SolidWorks; SolidEdge; UG NX; an Inventor; step/stp; iges/igs; jt; sat/sab; STL; parasolid (x _ t/x _ b); 3dxml, it will be understood by those skilled in the art that the file format that the lightweight converter can convert is not limited to these, and any commercially available CAD file format can be used. The lightweight conversion speed of the lightweight converter has no fixed value and mainly depends on the size and complexity of an original CAD file, and CAD files in different formats may not be the same. In addition, if the number of parts is particularly large, the time taken for weight reduction conversion increases as the number of parts increases.
A parallel scheduling module 105 for scheduling a plurality of lightweight converters of operation, comprising: the device comprises a monitoring module, a distribution module and a judgment module. The capacity of the server where the converter is located can be conveniently expanded through the parallel scheduling program, and the scheduling program can take over the actions of starting, converting, restarting and the like of each converter on the current machine in a full-range mode.
The parallel scheduling module monitors the running state of each converter in real time, distributes tasks to the idle light-weight converters, and feeds the acquired execution state of the tasks back to the light-weight conversion management service module, wherein the parallel scheduling module judges the execution state of the tasks according to a preset time threshold value of the conversion tasks of the converters, automatically ends the conversion tasks exceeding the threshold value, and marks the conversion tasks as conversion failures. If the converter runs crash exit, the scheduler will restart the converter.
The monitoring module of the parallel scheduling module is used for monitoring the running state of each light-weight converter in real time; the distribution module is used for sending different tasks to different lightweight converters according to the running state; and the judging module is used for judging whether the time for the lightweight converter to execute the conversion task exceeds a preset threshold value.
The client is used for sending the CAD file to be converted uploaded by the user to the collaborative application service platform;
the client may be any electronic device capable of browsing a web page, such as a mobile phone client, a computer client, and the like, and the device is not limited herein as long as a user can browse and operate a web page.
The collaborative application service platform is used for storing the CAD file to be converted into a file server and sending a conversion instruction to the CAD model lightweight service equipment; the collaborative application service can detect whether the model conversion is successful, mark the successfully converted model and display a model preview interface, and when a user accesses the collaborative application through a client, a browser-side model browsing control is started through the model view interface to view the model.
And the file server is used for storing the CAD files to be converted and the CAD files which are uploaded by the user and are converted.
As shown in fig. 2, an embodiment of the present invention provides a CAD model lightweight service method, including:
the client uploads a CAD file to be transferred based on the operation of a user;
the cooperative application service platform receives the CAD file to be transferred, stores the CAD file to a file server, and sends a transfer instruction to the lightweight conversion management service module;
the parallel scheduling module acquires a gear shifting instruction from the lightweight conversion management service module, and then a gear shifting task is allocated to the lightweight converter in an idle state;
the parallel scheduling module monitors the running state of each light-weight converter in real time after distributing the shift task to the light-weight converters in the idle state, feeds the obtained running state of the task back to the light-weight conversion management service module, and the light-weight conversion management service module sends the running state of the task to the cooperative application service platform;
the parallel scheduling module monitors the running time of each light-weight converter in real time and judges the running state of each light-weight converter according to the running time;
if the completion time of converting the file by the converter is less than or equal to a preset time threshold value, marking the file as being converted;
and if the completion time of converting the file by the converter exceeds a preset time threshold, finishing the conversion and marking as conversion failure.
The lightweight converter acquires a CAD model to be converted from the file server, performs model lightweight processing to generate a lightweight model file, and stores the lightweight model file in the file server;
and the browser-side model browsing module browses the files in the file server based on the operation of the user.
Another embodiment of the present invention provides a computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements any combination of one or more computer readable media in a practical application. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. In the present embodiment, a computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
As shown in fig. 3, another embodiment of the present invention provides a schematic structural diagram of a computer device. The computer device 12 shown in FIG. 3 is only an example and should not impose any limitation on the scope of use or functionality of embodiments of the present invention.
As shown in FIG. 3, computer device 12 is in the form of a general purpose computing device. The components of computer device 12 may include, but are not limited to: one or more processors or processing units 16, a system memory 28, and a bus 18 that couples various system components including the system memory 28 and the processing unit 16.
The system memory 28 may include computer system readable media in the form of volatile memory, such as Random Access Memory (RAM)30 and/or cache memory 32. Computer device 12 may further include other removable/non-removable, volatile/nonvolatile computer system storage media. By way of example only, storage system 34 may be used to read from and write to non-removable, nonvolatile magnetic media (not shown in FIG. 3, and commonly referred to as a "hard drive"). Although not shown in FIG. 3, a magnetic disk drive for reading from and writing to a removable, nonvolatile magnetic disk (e.g., a "floppy disk") and an optical disk drive for reading from or writing to a removable, nonvolatile optical disk (e.g., a CD-ROM, DVD-ROM, or other optical media) may be provided. In these cases, each drive may be connected to bus 18 by one or more data media interfaces. Memory 28 may include at least one program product having a set (e.g., at least one) of program modules that are configured to carry out the functions of embodiments of the invention.
A program/utility 40 having a set (at least one) of program modules 42 may be stored, for example, in memory 28, such program modules 42 including, but not limited to, an operating system, one or more application programs, other program modules, and program data, each of which examples or some combination thereof may comprise an implementation of a network environment. Program modules 42 generally carry out the functions and/or methodologies of the described embodiments of the invention.
The processor unit 16 executes various functional applications and data processing by running programs stored in the system memory 28, for example, to implement a CAD model lightweight service method provided by an embodiment of the present invention.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A CAD model lightweight service device is characterized by comprising:
the browser-side model browsing module is used for reading and browsing lightweight files;
the light-weight conversion management service module is used for managing light-weight conversion tasks, and updating and feeding back the running state of each task;
the light-weight converter is used for converting CAD files in different formats into light-weight files;
and the parallel scheduling module is used for scheduling a plurality of running lightweight converters.
2. The apparatus of claim 1, wherein the parallel scheduling module comprises:
the monitoring module is used for monitoring the running state of each light-weight converter in real time;
the distribution module is used for sending different tasks to different lightweight converters according to the running state;
and the judging module is used for judging whether the time for the lightweight converter to execute the conversion task exceeds a preset threshold value.
3. A CAD model lightweight service system, comprising:
the CAD model lightweight service device of any of claims 1-2;
the client is used for sending the CAD file to be converted uploaded by the user to the collaborative application service platform;
the collaborative application service platform is used for storing the CAD file to be converted into a file server and sending a conversion instruction to the CAD model lightweight service equipment;
and the file server is used for storing the CAD files to be converted and the CAD files which are uploaded by the user and are converted.
4. The system of claim 3, wherein the collaborative application service platform comprises:
the query module is used for querying whether the parallel scheduling module sends a prompt that the time for converting the tasks exceeds a preset threshold value;
a marking module: the model is used for marking the model of which the conversion time does not exceed a preset threshold value;
and the previewing module is used for previewing the marked model.
5. A CAD model lightweight service method using the system according to claim 3 or 4,
the client uploads a CAD file to be transferred based on the operation of a user;
the cooperative application service platform receives the CAD file to be transferred, stores the CAD file to a file server, and sends a transfer instruction to the lightweight conversion management service module;
the parallel scheduling module acquires a gear shifting instruction from the lightweight conversion management service module, and then a gear shifting task is allocated to the lightweight converter in an idle state;
the lightweight converter acquires a CAD model to be converted from the file server, performs model lightweight processing to generate a lightweight model file, and stores the lightweight model file in the file server;
and the browser-side model browsing module browses the files in the file server based on the operation of the user.
6. The method of claim 5, wherein the parallel scheduling module monitors the operation state of each light-weight converter in real time after allocating the shift task to the idle light-weight converter, and feeds the acquired operation state of the task back to the light-weight conversion management service module, and the light-weight conversion management service module sends the operation state of the task to the collaborative application service platform.
7. The method of claim 6, wherein the parallel scheduling module monitors the running time of each light weight converter in real time, and determines the running state of each light weight converter according to the running time;
if the completion time of converting the file by the converter is less than or equal to a preset time threshold value, marking the file as being converted;
and if the completion time of converting the file by the converter exceeds a preset time threshold, finishing the conversion and marking as conversion failure.
8. The method according to claim 6, wherein the preset time threshold is positively correlated with the size and complexity of the CAD file to be converted.
9. A computer device comprising a processor and a memory having stored thereon a computer program, characterized in that the processor, when executing the program, implements the method according to any of claims 5-8.
10. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the method according to any one of claims 5-8.
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| CN115291842A (en) * | 2022-08-24 | 2022-11-04 | 金航数码科技有限责任公司 | Light-weight conversion and online browsing method and system for CAD structural part |
| CN118051966A (en) * | 2022-07-14 | 2024-05-17 | 苏州浩辰软件股份有限公司 | View navigation method and device |
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