Hyundai Mobis uses acoustic AI system to check product quality at one unit per second

Acoustic AI analyses subtle sounds generated during product inspection to determine quality accuracy and to inspect for defects at a rate of one per second. Hyundai Mobis is using the system at its Changwon plant which produces EPS.

Autocar Pro News Desk By Autocar Pro News Desk calendar 25 Jun 2024 Views icon1799 Views Share - Share to Facebook Share to Twitter Share to LinkedIn Share to Whatsapp
Hyundai Mobis is using the acoustic-based AI system at its Changwon plant for quality inspection of EPS (Electric Power Steering). 

Hyundai Mobis is using the acoustic-based AI system at its Changwon plant for quality inspection of EPS (Electric Power Steering). 

Hyundai Mobis has developed an AI system which utilises sound for quality inspection, which is now implemented in its production lines. This innovative approach leverages artificial intelligence to analyse the subtle sounds generated during product inspection to determine quality accuracy.

On June 19, Hyundai Mobis announced that it has recently completed a pilot implementation of an acoustic AI-based inspection system at its Changwon plant, which produces EPS.
 
Acoustic AI represents a new generation of artificial intelligence technology, distinguished from generative AI, which relies on language for Q&A tasks. It remains relatively untested in the manufacturing industry. The key to acoustic AI is developing algorithms that assign meaning to specific sounds and facilitate appropriate judgments. 
Hyundai Mobis plans to extend the acoustic AI inspection system from the Changwon plant to other component production lines, prioritizing parts like braking systems that inherently generate noise due to their operational nature.
Choi Nak-Hyun, Vice-President and Head of Digital Transformation at Hyundai Mobis, stated: “This initiative marks a pioneering example of process innovation not only in the automotive sector but across the global manufacturing industry. We will continue introducing differentiated AI-based technologies for production, R&D, and improvements in work environments.”
 
Rapid speed check: one unit per second

While generative AI emphasizes versatility for general users, acoustic AI is designed for industrial applications, especially smart factories. Its primary advantage is processing large volumes of tasks in a short time. The inspection system at the Changwon plant can detect defective products at a rate of one unit per second.

The Changwon plant produces approximately 1.3 million units of EPS annually. The production process includes 23 stages, from component assembly to vibration and noise inspection.

Since EPS directly impacts steering performance and safety through the steering wheel, meticulous quality checks are essential. Noise inspections are conducted by connecting actual power to the EPS. The sound generated by the rotating motor creates a consistent waveform, which the AI analyzes to identify deviations or anomalies.

Previously, suspect defective products below a certain threshold were initially filtered by an automated system after assembly, followed by manual re-evaluation by specialized personnel. To enhance quality competitiveness, Hyundai Mobis states that it collaborated for about a year with on-site engineers, production technology experts, and AI specialists holding advanced degrees to gather and analyse data, successfully developing Acoustic AI. This system can now distinguish defective products and their causes.

Hyundai Mobis plans to validate and expand the application of acoustic AI. In the manufacturing sector, the company aims to continuously collect meaningful data through its pioneering acoustic AI and develop proprietary AI models based on this data. The accuracy of this trained AI is expected to improve further.

RELATED ARTICLES
JLR to roll out Pirelli FSC-certified natural rubber tyres across its range

auther Autocar Pro News Desk calendar12 Jul 2024

The British luxury car manufacturer will be the first to adopt FSC‑certified tyres at scale, transitioning all tyres fro...

Volvo sells 388,073 cars in H1 2024, up 14%, electrified models share rises to 45%

auther Autocar Pro News Desk calendar12 Jul 2024

In the first six months of 2024, sales of electrified models at 173,668 units were up 27% YoY and accounted for 44% of t...

Iveco wins 900-bus contract worth 225 million euros from Austria

auther Autocar Pro News Desk calendar12 Jul 2024

The Rs 1,977 crore contract is for 540 Crossway buses to be delivered by the end of 2026 and an option for further 380 u...