The Correct Click: audio technology tests connectors used in automobile production
An audio-based technology analyzes the clicking noise that is generated when a connection is plugged in
Manufacturers often rely on practical plug connections during the production of automobiles. However, time and money are wasted if an incorrectly plugged-in connection goes unnoticed. The Fraunhofer Institute for Digital Media Technology IDMT in Oldenburg has therefore developed a solution. An audio-based technology analyzes the clicking noise that is generated when a connection is plugged in. Should a connection fail to click into place, employees or the “colleague robot” will be alerted via an error message.
Fraunhofer IDMT’s click detection can be integrated into the reporting system and be displayed via an interface. The microphone can be integrated into a work glove and can also be combined with a smartwatch. © Fraunhofer IDMT / Anika Bödecker
When it comes to modern industrial production, particularly in the automotive industry, many connections between individual components are no longer screwed, glued or welded, but are instead held together by plug connections. But are all these connections really plugged in correctly? Researchers from the Oldenburg Branch for Hearing, Speech and Audio Technology HSA at Fraunhofer IDMT are presenting a new way to check this at the Hannover Messe. An innovative test system detects whether parts are correctly connected based on the noise that occurs whenever they are plugged in. Microphones first record the noise, which is then analyzed by software algorithms. Finally, the system provides positive feedback or sends a warning if it has not clicked correctly. This will have benefits for both employees and automated robotic systems. A human can receive the feedback via acoustic, visual or even tactile means, for example via vibration. A robot then receives the necessary information directly from the sensor system.
This demo device for click detection illustrates the reliable engagement of plug connections. The industrial traffic light indicates incorrect or correct engagement. © Fraunhofer IDMT / Hannes Kalter
“This technology addresses a common challenge in automobile assembly,” says Danilo Hollosi, head of Acoustic Event Detection. “Automobiles usually have several hundred connectors. If any one of these connections doesn’t engage properly during production and it’s not noticed until after the car has been delivered to the customer, then the car has to be returned for repair. That’s frustrating for the owner, and the car manufacturers end up wasting time and money. Given the low margins in mass production, this turns into a serious problem.” This is where audio-based monitoring can help.
More information at https://www.fraunhofer.de
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