CN115222659A

CN115222659A - Part size evaluation method and device, terminal and storage medium

Info

Publication number: CN115222659A
Application number: CN202210619975.7A
Authority: CN
Inventors: 马宏垒; 王国勇; 孙政; 古田�
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-10-21

Abstract

The invention belongs to the technical field of automobiles, and particularly relates to a part size evaluation method, a part size evaluation device, a terminal and a storage medium. The method comprises the following steps: firstly, carrying out global data scanning on a real object part; partitioning the part point cloud according to the part GD & T to form a part point cloud area; thirdly, performing tolerance zone definition on the cloud area of the part point according to the part GD & T; and step four, according to the tolerance partition definition, carrying out size evaluation based on the point cloud domain on the part and calculating the qualified rate. According to the method, the free state scanning or the positioning scanning of the part is selected according to the rigidity of the part, the point cloud data is obtained after the whole domain of the part is scanned, the part matching characteristic cloud is selected and extracted through the point cloud domain according to the part matching characteristic, and the part matching characteristic cloud is evaluated based on tolerance.

Description

Part size evaluation method and device, terminal and storage medium

Technical Field

The invention belongs to the technical field of automobiles, and particularly relates to a part size evaluation method, a part size evaluation device, a terminal and a storage medium.

Background

At present, two main ways of evaluating the size of parts in the industry are available. (1) measuring point evaluation mode. The evaluation mode is mainly characterized in that a manual gauge is used for measurement or data acquisition is carried out by three coordinates, and a craftsman evaluates the data after the data acquisition. The biggest problem with this approach to evaluation is that the discrete points do not reflect the global state of the part-matching area. If size deviation appears outside the measuring point, the existing scheme can not identify. And (2) a full data evaluation scheme. The evaluation mode mainly comprises the steps of scanning and collecting by optical equipment, fitting through point cloud and part digital models after collection, obtaining the global data of the parts and providing the global data qualification rate. The problem with this type of evaluation is that 50% or more of the total area data of the part does not affect the matching result, and the matching state of the part cannot be truly reflected in the level of yield.

Disclosure of Invention

The invention provides a part size evaluation method, a device, a terminal and a storage medium, wherein part free state scanning or positioning scanning is selected according to part rigidity, point cloud data is obtained after part universe scanning, part matching characteristic cloud is extracted through point cloud domain selection according to part matching characteristics, and the part matching characteristic cloud is evaluated based on tolerance.

The technical scheme of the invention is explained by combining the drawings as follows:

according to a first aspect of embodiments of the present invention, there is provided a part dimension evaluation method including the steps of:

firstly, carrying out global data scanning on a real object part;

partitioning the part point cloud according to the parts GD & T to form a part point cloud area;

thirdly, performing tolerance zone definition on the cloud area of the part point according to the part GD & T;

and step four, according to the tolerance partition definition, performing size evaluation based on the point cloud domain on the part and calculating the qualified rate.

Furthermore, the part point cloud area comprises a welding surface of the reinforcing plate and the side wall outer plate, namely an area A, a hinge installation surface, namely an area B, and a welding surface of the left rear assembly, namely an area C.

Further, the tolerance of the A area is +/-0.5.

Further, the tolerance of the B area is +/-0.5.

Further, the tolerance of the C area is +/-0.7.

Further, the specific method of the fourth step is as follows:

1) Judging the total number of qualified point clouds in the matching domain and the total number of point clouds in the matching domain;

2) The domain qualification rate = total number of qualified point clouds in the matching domain/total number of point clouds in the matching domain × 100%.

According to a second aspect of an embodiment of the present invention, there is provided a part size evaluation apparatus including:

the scanning module is used for carrying out global data scanning on the real object part;

the point cloud distinguishing module is used for distinguishing the part point cloud according to the part GD & T to form a part point cloud area;

the tolerance zone definition module is used for performing tolerance zone definition on the part point cloud zone according to the parts GD & T;

and the evaluation module is used for carrying out size evaluation based on the point cloud domain on the part according to the tolerance partition definition and calculating the qualified rate.

According to a third aspect of the embodiments of the present invention, there is provided a terminal, including:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

the method of the first aspect of the embodiments of the present invention is performed.

According to a fourth aspect of embodiments of the present invention, there is provided a non-transitory computer-readable storage medium, wherein instructions, when executed by a processor of a terminal, enable the terminal to perform the method of the first aspect of embodiments of the present invention.

According to a fifth aspect of embodiments of the present invention, there is provided an application program product, which, when running on a terminal, causes the terminal to perform the method of the first aspect of embodiments of the present invention.

The beneficial effects of the invention are as follows:

according to the method, the global scanning of the parts is carried out through the point cloud data, and the regional pertinence evaluation is carried out on the scanning data.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a flow chart of a part dimension evaluation method according to the present invention;

FIG. 2 is a schematic diagram of a component cloud region in the component dimension evaluation method according to the present invention;

FIG. 3 is a schematic view of a part size evaluation apparatus according to the present invention;

fig. 4 is a schematic block diagram of a terminal structure.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Example one

Fig. 1 is a flowchart of a method for evaluating a size of a part according to an embodiment of the present invention, where the method is applicable to a case of evaluating a size of a part, and the method can be executed by a device for evaluating a size of a part according to an embodiment of the present invention, and the device can be implemented in software and/or hardware.

Referring to fig. 1, a part size evaluation method includes the steps of:

firstly, carrying out global data scanning on a real object part;

according to the rigidity of the part, the part can be scanned in a free state or in a positioning mode, and the whole part can be scanned.

Referring to fig. 2, in the second step, the part point cloud is partitioned according to the part GD & T to form a part point cloud area;

the part point cloud area comprises a welding surface of the reinforcing plate and the side wall outer plate, namely an area A, a hinge mounting surface, namely an area B, and a welding surface of the left rear assembly, namely an area C.

the tolerance of the A area is +/-0.5.

The tolerance of the B area is +/-0.5.

The tolerance of the C area is +/-0.7.

And step four, according to the tolerance partition definition, carrying out size evaluation based on the point cloud domain on the part and calculating the qualified rate.

The domain qualification rate = total number of qualified point clouds in the matching domain/total number of point clouds in the matching domain × 100%.

Wherein GD & T is a geometric dimension and tolerance diagram.

Example two

Referring to fig. 3, a part size evaluating apparatus includes:

the tolerance zone definition module is used for carrying out tolerance zone definition on the cloud zone of the part point according to the part GD & T;

EXAMPLE III

Fig. 4 is a block diagram of a terminal according to an embodiment of the present application, where the terminal may be the terminal in the foregoing embodiment. The terminal 300 may be a portable mobile terminal such as: smart phones, tablet computers. The terminal 300 may also be referred to by other names such as user equipment, portable terminal, etc.

Generally, the terminal 300 includes: a processor 301 and a memory 302.

The processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and so on. The processor 301 may be implemented in at least one hardware form of a DSP (Digital Signal Processing), an FPGA (Field-Programmable Gate Array), and a PLA (Programmable Logic Array). The processor 301 may also include a main processor and a coprocessor, where the main processor is a processor for Processing data in a wake state, and is also called a Central Processing Unit (CPU); a coprocessor is a low power processor for processing data in a standby state. In some embodiments, the processor 301 may be integrated with a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content required to be displayed on the display screen. In some embodiments, the processor 301 may further include an AI (Artificial Intelligence) processor for processing computing operations related to machine learning.

Memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. Memory 302 may also include high speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in the memory 302 is used to store at least one instruction for execution by the processor 301 to implement a part dimension evaluation method provided herein.

In some embodiments, the terminal 300 may further include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, touch display screen 305, camera 306, audio circuitry 307, positioning components 308, and power supply 309.

The peripheral interface 303 may be used to connect at least one peripheral related to I/O (Input/Output) to the processor 301 and the memory 302. In some embodiments, the processor 301, memory 302, and peripheral interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, the memory 302 and the peripheral interface 303 may be implemented on a single chip or circuit board, which is not limited by the embodiment.

The Radio Frequency circuit 304 is used for receiving and transmitting RF (Radio Frequency) signals, also called electromagnetic signals. The radio frequency circuitry 304 communicates with communication networks and other communication devices via electromagnetic signals. The rf circuit 304 converts an electrical signal into an electromagnetic signal to transmit, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 comprises: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a subscriber identity module card, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocols include, but are not limited to: the world wide web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity) networks. In some embodiments, the rf circuit 304 may further include NFC (Near Field Communication) related circuits, which are not limited in this application.

The touch display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. The touch screen display 305 also has the ability to capture touch signals on or above the surface of the touch screen display 305. The touch signal may be input to the processor 301 as a control signal for processing. The touch screen display 305 is used to provide virtual buttons and/or a virtual keyboard, also referred to as soft buttons and/or a soft keyboard. In some embodiments, the touch display screen 305 may be one, providing the front panel of the terminal 300; in other embodiments, the touch display screens 305 may be at least two, respectively disposed on different surfaces of the terminal 300 or in a folded design; in still other embodiments, the touch display 305 may be a flexible display disposed on a curved surface or a folded surface of the terminal 300. Even more, the touch display screen 305 may be arranged in a non-rectangular irregular figure, i.e. a shaped screen. The touch Display screen 305 may be made of LCD (Liquid Crystal Display), OLED (Organic Light-Emitting Diode), and the like.

The camera assembly 306 is used to capture images or video. Optionally, camera assembly 306 includes a front camera and a rear camera. Generally, a front camera is used for realizing video call or self-shooting, and a rear camera is used for realizing shooting of pictures or videos. In some embodiments, the number of the rear cameras is at least two, and each of the rear cameras is any one of a main camera, a depth-of-field camera and a wide-angle camera, so that the main camera and the depth-of-field camera are fused to realize a background blurring function, and the main camera and the wide-angle camera are fused to realize a panoramic shooting function and a VR (Virtual Reality) shooting function. In some embodiments, camera assembly 306 may also include a flash. The flash lamp can be a monochrome temperature flash lamp or a bicolor temperature flash lamp. The double-color-temperature flash lamp is a combination of a warm-light flash lamp and a cold-light flash lamp, and can be used for light compensation at different color temperatures.

Audio circuit 307 is used to provide an audio interface between the user and terminal 300. Audio circuitry 307 may include a microphone and a speaker. The microphone is used for collecting sound waves of a user and the environment, converting the sound waves into electric signals, and inputting the electric signals to the processor 301 for processing or inputting the electric signals to the radio frequency circuit 304 to realize voice communication. The microphones may be provided in plural numbers, respectively, at different portions of the terminal 300 for the purpose of stereo sound collection or noise reduction. The microphone may also be an array microphone or an omni-directional pick-up microphone. The speaker is used to convert electrical signals from the processor 301 or the radio frequency circuitry 304 into sound waves. The loudspeaker can be a traditional film loudspeaker or a piezoelectric ceramic loudspeaker. When the speaker is a piezoelectric ceramic speaker, the speaker can be used for purposes such as converting an electric signal into a sound wave audible to a human being, or converting an electric signal into a sound wave inaudible to a human being to measure a distance. In some embodiments, audio circuitry 307 may also include a headphone jack.

The positioning component 308 is used to locate the current geographic Location of the terminal 300 to implement navigation or LBS (Location Based Service). The Positioning component 308 can be a Positioning component based on the Global Positioning System (GPS) in the united states, the beidou System in china, or the galileo System in russia.

The power supply 309 is used to supply power to the various components in the terminal 300. The power source 309 may be alternating current, direct current, disposable batteries, or rechargeable batteries. When the power source 309 includes a rechargeable battery, the rechargeable battery may be a wired rechargeable battery or a wireless rechargeable battery. The wired rechargeable battery is a battery charged through a wired line, and the wireless rechargeable battery is a battery charged through a wireless coil. The rechargeable battery may also be used to support fast charge technology.

Those skilled in the art will appreciate that the configuration shown in fig. 4 is not intended to be limiting of terminal 300 and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components may be used.

Example four

In an exemplary embodiment, there is also provided a computer-readable storage medium on which a computer program is stored, which when executed by a processor, implements a part dimension evaluation method as provided by all inventive embodiments of the present application.

Any combination of one or more computer-readable media may be employed. 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 context of this document, 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.

A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take any of a variety of forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).

EXAMPLE five

In an exemplary embodiment, an application product is also provided that includes one or more instructions executable by the processor 301 of the apparatus to perform a part size evaluation method as described above.

While embodiments of the invention have been disclosed above, it is not intended to be limited to the applications set forth in the specification and the examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. Therefore, the invention is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concept as defined by the claims and their equivalents.

Claims

1. A part dimension evaluation method is characterized by comprising the following steps:

firstly, carrying out global data scanning on a real object part;

partitioning the part point cloud according to the part GD & T to form a part point cloud area;

2. The part size evaluation method according to claim 1, wherein the part point cloud area comprises a welding surface of the reinforcing plate and the side wall outer plate, namely an area A, a hinge mounting surface, namely an area B, and a welding surface of the left rear assembly, namely an area C.

3. A part dimension evaluation method according to claim 2, wherein the tolerance of said region a is ± 0.5.

4. The method of claim 2, wherein the tolerance of the region B is ± 0.5.

5. A part dimension evaluation method according to claim 2, wherein the tolerance of said C region is ± 0.7.

6. The part dimension evaluation method according to claim 1, wherein the specific method of the fourth step is as follows:

7. A part dimension evaluation apparatus, comprising:

8. A terminal, comprising:

one or more processors;

a memory for storing the one or more processor-executable instructions;

wherein the one or more processors are configured to:

a part dimension evaluation method as claimed in any one of claims 1 to 6 is performed.

9. A non-transitory computer-readable storage medium, wherein instructions in the storage medium, when executed by a processor of a terminal, enable the terminal to perform a part dimension evaluation method as claimed in any one of claims 1 to 6.