公开(公告)号：US11480547B2

公开(公告)日：2022-10-25

申请号：US16451159

申请日：2019-06-25

Applicant: NXP B.V.

Inventor： Kim Phan Le ,  Jozef Thomas Martinus van Beek ,  David Camara

IPC: G01N29/02 ,  G01N29/024 ,  H04M1/02

Abstract: A liquid immersion sensor for a mobile device with at least two acoustic transducers is described. The liquid immersion sensor may include a signal generator having a signal generator output configured to generate a signal for transmission via a first acoustic transducer, and a signal receiver having a signal receiver input configured to receive a delayed version of the generated signal via a second acoustic transducer. The signal receiver includes a signal receiver output. The liquid immersion sensor includes a controller having a first controller input for receiving a reference signal and a second controller input coupled to the signal receiver output. The controller determines a time lag value between the reference signal and the delayed signal and generates a control output signal dependent on the phase difference. The control output signal indicates if the mobile device is immersed in liquid.

公开(公告)号：US20200018726A1

公开(公告)日：2020-01-16

申请号：US16451159

申请日：2019-06-25

Applicant: NXP B.V.

Inventor： Kim Phan Le ,  Jozef Thomas Martinus van Beek ,  David Camara

IPC: G01N29/024 ,  H04M1/02

Abstract: A liquid immersion sensor for a mobile device with at least two acoustic transducers is described. The liquid immersion sensor may include a signal generator having a signal generator output configured to generate a signal for transmission via a first acoustic transducer, and a signal receiver having a signal receiver input configured to receive a delayed version of the generated signal via a second acoustic transducer. The signal receiver includes a signal receiver output. The liquid immersion sensor includes a controller having a first controller input for receiving a reference signal and a second controller input coupled to the signal receiver output. The controller determines a time lag value between the reference signal and the delayed signal and generates a control output signal dependent on the phase difference. The control output signal indicates if the mobile device is immersed in liquid.