SmartEar™ has been designed to measure a mill’s performance by analysing its acoustic emissions. Thus, SmartEar™ helps to prevent damage to the liners caused by the impact of the balls, and provides an estimate of the filling level when used in conjunction with SmartSAG™. The SmartEar™ system is composed of microphones with flat response, a signal transducer, transmission system, and software to process the information. The transduced signal can be transmitted in several ways such as direct transmission through cables, optical fibre, or wirelessly.
The software processes the signal in terms of audible intensity (dB) and frequencies (Hz), and uses three pre-configured filters to monitor the charge of the mill, liner impacts, and abnormal events. SmartEar™ can operate as a stand-alone system or can interface with any control system.
SmartEar™ audio frequency spectrum.
SmartEar™ acoustic energy trends.