Photometric stereo-based high-speed inline battery electrode inspection

Abstract Battery technology is a key component in current electric vehicle applications and an important building block for upcoming smart grid technologies. The performance of batteries depends largely on quality control during their production process. Defects introduced in the production of electrodes can lead to degraded performance and, more importantly, to short circuits in final cells, which is highly safety-critical. In this paper, we propose an inspection system architecture that can detect defects, such as missing coating, agglomerates, and pinholes on coated electrodes. Our system is able to acquire valuable production quality control metrics, like surface roughness. By employing photometric stereo techniques, a shape from shading algorithm, our system surmounts difficulties that arise while optically inspecting the black to dark gray battery coating materials. We present in detail the acquisition concept of the proposed system architecture, and analyze its acquisition-, as well as, its surface reconstruction performance in experiments. We carry these out utilizing two different implementations that can operate at a production speed of up to 2000 mm/s at a resolution of 50 µm per pixel. In this work we aim to provide a system architecture that can provide a reliable contribution to ensuring optimal performance of produced battery cells.

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Elaboration of standards and quality of railway rails

Ferrous Metallurgy Bulletin of Scientific Technical and Economic Information ◽

10.32339/0135-5910-2020-12-1265-1276 ◽

2020 ◽

Vol 76 (12) ◽

pp. 1265-1276

Author(s):

L. A. Smirnov ◽

V. A. Rabovskii ◽

A. B. Dobuzhskaya ◽

G. N. Yunin ◽

A. I. Borts

Keyword(s):

Quality Control ◽

High Speed ◽

Steel Production ◽

Production Quality ◽

National Standards ◽

National Standard ◽

Current Standard ◽

Production Quality Control ◽

Technical Requirements ◽

Service Durability

Russian national standards for rails establish technical requirements, acceptance rules and quality control methods. These are very important to ensure the quality and service durability of rails. Requirements for rail production variation within a period from 1960 to the present considered, peculiarities of their accounting in the standards shown. It was demonstrated that stricter requirements to rails resulted in the development of new steel compositions, the creation and introduction of new technological processes in steel production, rail rolling and heat treatment, as well as new methods of production quality control. Basic technical requirements for rails produced according to the national standard of theRussian Federationand to the European Norm presented. It was pointed out that the current national standard GOST R 51685‒2013 was elaborated accounting the requirements of the latest foreign standard EN 3674-1:2011+A1:2017. However, the former is not equivalent to the latter because it pertains to Russian rail types and contains requirements corresponding to the Russian climatic and geographical conditions, as well as the track facilities system used by OJSC RZD. It was shown that rails, meeting the current standard requirements, in terms of operational resistivity exceed the resistivity level of best foreign analogues. At present, a new standard is being elaborated accounting the need of increasing the service life of railway rails under conditions of high load, low climatic temperatures, higher-speed combined train operation and high-speed running, and high working capacity. The list of key issues presented, that are mirrored in the new standard draft, which accounts for the goal of mastering new rail categories and the increased requirements of OJSC RZD to rails quality.

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Comprehensive production quality-control system at the Minneftekhimprom enterprises based on metrological provisions for production

Measurement Techniques ◽

10.1007/bf00826039 ◽

1977 ◽

Vol 20 (7) ◽

pp. 932-935

Author(s):

V. M. Sobolev

Keyword(s):

Quality Control ◽

Control System ◽

Production Quality ◽

Quality Control System ◽

Production Quality Control ◽

Comprehensive Production ◽

Metrological Provisions

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Using Impact Testing for Production Quality Control

Special Topics in Structural Dynamics & Experimental Techniques, Volume 5 - Conference Proceedings of the Society for Experimental Mechanics Series ◽

10.1007/978-3-030-47709-7_5 ◽

2020 ◽

pp. 49-57

Author(s):

Shawn Richardson ◽

Jason Tyler ◽

Randall Spears ◽

Mark Richardson

Keyword(s):

Quality Control ◽

Production Quality ◽

Impact Testing ◽

Production Quality Control

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Blockchain in manufacturing quality control: A computer simulation study

PLoS ONE ◽

10.1371/journal.pone.0247925 ◽

2021 ◽

Vol 16 (3) ◽

pp. e0247925

Author(s):

Pooi-Mun Wong ◽

Shreya R. K. Sinha ◽

Chee-Kong Chui

Keyword(s):

Quality Control ◽

Data Security ◽

Control Process ◽

Production Quality ◽

Consensus Algorithm ◽

Defect Tolerance ◽

Production Quality Control ◽

Peer Supervision ◽

Quality Control Process ◽

Quality Controller

Blockchain has been applied to quality control in manufacturing, but the problems of false defect detections and lack of data transparency remain. This paper proposes a framework, Blockchain Quality Controller (BCQC), to overcome these limitations while fortifying data security. BCQC utilizes blockchain and Internet-of-Things to form a peer-to-peer supervision network. This paper also proposes a consensus algorithm, Quality Defect Tolerance (QDT), to adopt blockchain for during-production quality control. Simulation results show that BCQC enhances data security and improves defect detections. Although the time taken for the quality control process increases with the number of nodes in blockchain, the application of QDT allows multiple inspections on a workpiece to be consolidated at a faster pace, effectively speeding up the entire quality control process. The BCQC and QDT can improve the quality of parts produced for mass personalization manufacturing.

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