Method and apparatus for detecting a moving object and object counting system
AssigneeInfineon Technologies AG
InventorsTim Hauke Langer, Florian Kelber, Christian Georg Mayr, Johannes Partzsch, Bernd Waschneck
Life of this patent
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Abstract
A method for detecting a moving object in a scene includes providing sampled ultrasonic echo signals from the scene; determining echo envelopes of the sampled ultrasonic echo signals; determining differentials of successive echo envelopes for providing echo envelope differentials; determining the absolute values of the echo envelope differentials; and conducting a classification based on the determined absolute values of the echo envelope differentials for determining a relative movement of the moving object.
Claims20
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.
An apparatus for detecting a moving object in a scene, the apparatus comprising:
- an ultrasonic receiver for receiving ultrasonic echo signals from the scene and for sampling the ultrasonic echo signals;
- and
- a processing means configured to:
- determine echo envelopes of the ultrasonic echo signals,
- determine differentials of successive echo envelopes for providing echo envelope differentials,
- determine absolute values of the echo envelope differentials, and
- conduct a classification based on the absolute values of the echo envelope differentials for determining a relative movement of the moving object.
An object counting system comprising:
- an ultrasonic transmitter for transmitting an ultrasonic signal into a scene for detecting a moving object in the scene;
- an ultrasonic receiver for receiving ultrasonic echo signals from the scene and for sampling the ultrasonic echo signals;
- and
- a processing means configured to:
- determine echo envelopes of the ultrasonic echo signals;
- determine differentials of successive echo envelopes for providing echo envelope differentials;
- determine absolute values of the echo envelope differentials;
- and
- conduct a classification based on the absolute values of the echo envelope differentials for determining a relative movement of the moving object.
Dependencies are inferred from the claim text.