Device and method for sound-based environment detection

By analyzing the ringing dominance range to separate transducer signals from echoes, the system improves reliability and accuracy in echo-based environmental detection.

DE102014213122B4Active Publication Date: 2025-08-28ROBERT BOSCH GMBH
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Patent Information

Application Number
DE102014213122
Authority / Receiving Office
DE · DE
Patent Type
Patents
Current Assignee / Owner
Filing Date
2014-07-07
Publication Date
2025-08-28
Estimated Expiration
2034-07-07

AI Technical Summary

Technical Problem

Existing echo-based environmental detection systems struggle to unambiguously distinguish transducer signals from echoes due to overlapping signal strength ranges, leading to unreliable object detection, especially in stationary vehicles.

Method used

Determine transducer properties by analyzing the ringing dominance range of electrical signals after transmission excitation, using a model to separate ringing signals from echoes, allowing early detection of transducer characteristics and improving reliability.

Benefits of technology

Enables early assessment of transducer reliability and reduces false echo detection by separating ringing signals, enhancing the accuracy and efficiency of environmental detection systems.

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Abstract

Method for sound-based environment detection using echoes comprising the steps: - impressing (100) an electrical signal into a sound transducer (1), thereby causing an acoustic measurement signal (2) to be emitted via the sound transducer (1), - determining (200) a start of a decay dominance range (V) based on stored variables assigned to the sound transducer (1) from a data memory (15), which corresponds to the end of the impression of the electrical measurement signal to be emitted, - detecting (300) a first electrical signal (r(t)) of the sound transducer (1) within the decay dominance range (V), - determining (400) characteristic properties, in particular an impulse response, and / or a corresponding transformed transfer function, of the sound transducer (1) from the first electrical signal (r(t)), - creating (500) a model (M1) of a decay signal of the sound transducer (1) based on the characteristic properties of the sound transducer (1) and the impressed electrical signal, and - Using (600) the model (M1) of the decay signal in an identification of an echo contained in the electrical signal (r(t)).
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Citation Information

Patent Citations

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  • Method for determining the position and / or movement of at least one object in the vicinity of a vehicle and / or for transmitting information by means of at least one transmitted acoustic signal and environment detection device for carrying out the method

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  • Method for detecting sensor degradation in distance sensors

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