Matthew Nelson Allen

US Patent:

20180156905, Jun 7, 2018

Filed:

Oct 23, 2017

Appl. No.:

15/791378

Inventors:

- Cambridge MA, US
Matthew Paul Allen - Arlington VA, US
Michael Bruce Goldsmith - Framingham MA, US

International Classification:

G01S 11/14
G08G 1/015
G08G 1/04
G08G 1/052

Abstract:

A system for isolating signals from individual vehicles. An array of sensors generates a plurality of time records. The time records are transformed into spectrogram structures, and for each time-frequency point in the spectrogram structures, a bearing is calculated, to form a movement structure. A Hough transform is used to fit a movement model to the movement structure, to form a Hough transform structure. Peaks in the Hough transform structure correspond to vehicles and their position in the Hough transform structure correspond to motion parameters, such as the velocity of the vehicle, and the time of closest approach of the vehicle to the array of acoustic sensors. A model of the motion of a vehicle is then used to associate, with the vehicle, points (e.g., structure elements in the spectrogram structures) from the data.