Abstract:
A highly sensitive inductive wear debris sensor based on intermittent excitation is presented for real-time condition monitoring of machinery faults. The specially design...Show MoreMetadata
Abstract:
A highly sensitive inductive wear debris sensor based on intermittent excitation is presented for real-time condition monitoring of machinery faults. The specially designed intermittent excitation method utilizes short-term large currents to periodically generate a strong alternating magnetic field, thus attaining enhanced sensitivity and low heat generation at the same time. A combination of different excitation currents is also applied for multisensitivity measurement to expand the detectable size range and detection accuracy, which is suitable for industrial occasions with complex detection requirements. In order to verify the effectiveness of intermittent excitation, a sensor prototype and signal processing system have been constructed. The testing results demonstrate that the sensitivity of the proposed sensor using intermittent excitation with a duty cycle of 1% is 10 times that of constant excitation with the same power consumption. A wide detectable size range of 48–1426 μm iron particles and 112–3802 μm copper particles in a 10 mm diameter sensing channel have been realized by dual-sensitivity measurement with outstanding temperature stability and size accuracy. The design concept of intermittent excitation can be extended to various types of debris sensors and other online detection equipment for great performance improvement.
Published in: IEEE Transactions on Industrial Electronics ( Volume: 70, Issue: 6, June 2023)