公开(公告)号：US20240210236A1

公开(公告)日：2024-06-27

申请号：US18394542

申请日：2023-12-22

Applicant: AGM TECHNOLOGIES LIMITED

Inventor： Stephen William COWPER

IPC: G01H3/06 ,  G01H1/00 ,  H04R1/02 ,  H04R1/08 ,  H04R3/04

CPC classification number: G01H3/06 ,  G01H1/00 ,  H04R1/028 ,  H04R1/08 ,  H04R3/04 ,  H04R2430/03 ,  H04R2499/13

Abstract: There is provided a method of, and a corresponding system for, detecting an event related to vehicle integrity, such as an oblique angle or side swipe type crash. The method may include using a microphone to transduce sound into an analog audio signal, and then using an analog signal processor analogically transforming said analog audio signal in the time-frequency domain, including dividing the audio signal into a plurality of time segments, and each time segment into a plurality of signal components in a plurality of predetermined frequency bands. Such time-frequency spectrogram can be evaluated by the signal processor in order to detect vehicle integrity-related events. Accordingly, the system only requires ultra-low power, since no (analog) to digital conversion is required. This is advantageous in applications such as battery powered continuous vehicle monitoring. The method may also be carried out recurring to digital signal processing, that is in the digital domain.