Methods, systems, and storage media for assembly quality control based on industrial internet of things (IIoT)

An Industrial Internet of Things (IIoT) system for assembly quality control, comprising an IIoT user platform, an IIoT service platform, an IIoT management platform, an IIoT sensing network platform, and an IIoT sensing and control platform, wherein the IIoT management platform includes a processor and a storage device, and the IIoT management platform is configured to:

• obtain, based on the IIoT sensing network platform, quality inspection information of a plurality of parts to be assembled through a quality inspection device of the IIoT sensing and control platform;
• determine, based on the quality inspection information and assembly information, an assembly risk value of each of at least one assembly process through an assembly database, the assembly database being configured in a data center of the IIoT management platform;
• generate a first assembly parameter in response to determining that the assembly risk value satisfies a risk condition, wherein to determine the first assembly parameter, the IIoT management platform is further configured to:
• determine a part to be assembled with a highest assembly degree as a center part, wherein the assembly degree refers to a count of types of parts to be assembled that are assembled with a single part to be assembled;
• determine a reference fit tolerance range of each type of parts to be assembled with the center part based on a historical assembly record;
• select at least one part to be assembled from the each type of parts to be assembled whose fit tolerance with the center part is within the reference fit tolerance range;
• randomly select a part to be assembled from the at least one part to be assembled as a fit part of the center part;
• determine the first assembly parameter based on the fit part;
• wherein
• the first assembly parameter includes an assembly sequence parameter, and the IIoT management platform is further configured to:
• determine a set of parts based on a type of the plurality of parts to be assembled;
• determine a plurality of sub-sets of parts based on the quality inspection information of the plurality of parts to be assembled in the set of parts;
• generate a plurality of candidate assembly sequences based on the assembly information;
• for each of the plurality of candidate assembly sequences:
• construct, based on a plurality of sets of parts, the plurality of sub-sets of parts, and the candidate assembly sequence, an assembly map corresponding to the candidate assembly sequence;
• determine, based on the assembly map corresponding to the candidate assembly sequence, a predicted fit tolerance corresponding to the candidate assembly sequence through a fit model;
• determine a first assembly sequence parameter based on a plurality of predicted fit tolerances corresponding to the plurality of candidate assembly sequences;
• send the first assembly parameter to an operation device of the IIoT sensing and control platform, and control the operation device to perform an assembly operation on the plurality of parts to be assembled based on the first assembly parameter;
• obtain assembly process data of the assembly operation based on a monitoring device of the IIoT sensing and control platform;
• determine assembly quality of a completed process based on the assembly process data;
• in response to determining that the assembly quality does not satisfy a quality requirement, determine a second assembly parameter based on the assembly quality, and send the second assembly parameter to a subsequent operation device of the IIoT sensing and control platform, so as to update an original assembly parameter of the subsequent operation device;
• generate quality warning information based on the assembly quality and the second assembly parameter, and send the quality warning information to the IIoT user platform based on the IIoT service platform;
• and
• generate, based on the completed process, quality update data for updating the assembly database.

A non-transitory computer-readable storage medium storing computer instructions, wherein when reading the computer instructions in the storage medium, a computer implements a method for assembly quality control based on Industrial Internet of Things (IIoT), the method being executed by an IIoT management platform of an IIoT system for assembly quality control, and the method comprising:

• obtaining, based on an IIoT sensing network platform, quality inspection information of a plurality of parts to be assembled through a quality inspection device of an IIoT sensing and control platform;
• determining, based on the quality inspection information and assembly information, an assembly risk value of each of at least one assembly process through an assembly database, the assembly database being configured in a data center of the IIoT management platform;
• generating a first assembly parameter in response to determining that the assembly risk value satisfies a risk condition, including:
• determining a part to be assembled with a highest assembly degree as a center part, wherein the assembly degree refers to a count of types of parts to be assembled that are assembled with a single part to be assembled;
• determining a reference fit tolerance range of each type of parts to be assembled with the center part based on a historical assembly record;
• selecting at least one part to be assembled from the each type of parts to be assembled whose fit tolerance with the center part is within the reference fit tolerance range;
• randomly selecting a part to be assembled from the at least one part to be assembled as a fit part of the center part;
• determining the first assembly parameter based on the fit part;
• wherein
• the first assembly parameter includes an assembly sequence parameter, and the method further comprises:
• determining a set of parts based on a type of the plurality of parts to be assembled;
• determining a plurality of sub-sets of parts based on the quality inspection information of the plurality of parts to be assembled in the set of parts;
• generating a plurality of candidate assembly sequences based on the assembly information;
• for each of the plurality of candidate assembly sequences:
• constructing, based on a plurality of sets of parts, the plurality of sub-sets of parts, and the candidate assembly sequence, an assembly map corresponding to the candidate assembly sequence;
• determining, based on the assembly map corresponding to the candidate assembly sequence, a predicted fit tolerance corresponding to the candidate assembly sequence through a fit model;
• determining a first assembly sequence parameter based on a plurality of predicted fit tolerances corresponding to the plurality of candidate assembly sequences;
• sending the first assembly parameter to an operation device of the IIoT sensing and control platform, and controlling the operation device to perform an assembly operation on the plurality of parts to be assembled based on the first assembly parameter;
• obtaining assembly process data of the assembly operation based on a monitoring device of the IIoT sensing and control platform;
• determining assembly quality of a completed process based on the assembly process data;
• in response to determining that the assembly quality does not satisfy a quality requirement, determining a second assembly parameter based on the assembly quality, and sending the second assembly parameter to a subsequent operation device of the IIoT sensing and control platform, so as to update an original assembly parameter of the subsequent operation device;
• generating quality warning information based on the assembly quality and the second assembly parameter, and sending the quality warning information to an IIoT user platform based on an IIoT service platform;
• and
• generating, based on the completed process, quality update data for updating the assembly database.