Integrated Ultrasonic-inductive Pulse Sensor for Wear Debris Detection
An apparatus for detecting wear particles in a fluid includes an inlet channel and an outlet channel. An ultrasonic transducer creating an acoustic wave that defines an acoustic focal zone is located between the inlet and outlet channels. A flow path located between the inlet and outlet channel is shaped to restrict the flow of the fluid to be within the acoustic focal zone. An inductive pulse sensorincludes a plurality of flow channels receiving the fluid and a plurality of planar coils wound around the flow channels. The inductive pulse sensor includes adetection system for the detection of wear particles passing through the flow channels based on a change in an electrical property of the planar coils. A single combined excitation signal is sent to all the planar coils at once and the detection system measures one single output measurement for the plurality of flow channels.
Zhe, Jiang and Du, Li, "Integrated Ultrasonic-inductive Pulse Sensor for Wear Debris Detection" (2014). Mechanical Engineering Faculty Research. 985.