US 12,117,522 B2
Method and apparatus for detecting a moving object and object counting system
Tim Hauke Langer, Dresden (DE); Florian Kelber, Dresden (DE); Christian Georg Mayr, Radebeul (DE); Johannes Partzsch, Dresden (DE); and Bernd Waschneck, Dresden (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Sep. 28, 2022, as Appl. No. 17/936,197.
Claims priority of application No. 21202292 (EP), filed on Oct. 12, 2021.
Prior Publication US 2023/0111734 A1, Apr. 13, 2023
Int. Cl. G08B 25/06 (2006.01); G01S 7/527 (2006.01); G01S 15/52 (2006.01)
CPC G01S 15/526 (2013.01) [G01S 7/5273 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for detecting a moving object in a scene, comprising:
sampling ultrasonic echo signals from the scene;
determining echo envelopes of the ultrasonic echo signals;
determining echo envelope differentials of successive echo envelopes;
determining absolute values of the echo envelope differentials; and
conducting a classification based on the absolute values of the echo envelope differentials for determining a relative movement of the moving object.