Method and device for detection of surroundings
AssigneeRobert Bosch GmbH
InventorsMichael Frank, Dirk Schmid
Life of this patent
Estimating the term…
Abstract
In a method and a device for detecting the surroundings, carrier waves in the form of transmission pulses are transmitted by at least one transducer, and reflections of the pulses are detected by the pulse-echo method. In this manner, the successive transmission pulses of one transducer or various transducers operated at the same time are differentiable by individual signal modulation.
Claims16
A method for detection of surroundings by using carrier waves transmitted by at least one transducer and detecting reflections of the transmitted carrier waves by a pulse-echo technique, comprising:
- transmitting a pulse of a first type by a first transducer using a carrier wave for a pulse length;
- transmitting a pulse of a second type by one of the first transducer or another transducer, wherein the pulse of the first type differs from the pulse of the second type in modulations of the respective carrier waves;
- and
- differentiating a reflection of the pulse of the first type from a reflection of the pulse of the second type on the basis of the different modulations.
A method for detection of surroundings, comprising:
- transmitting a first pulse of a first type;
- transmitting a second pulse of the first type after at least a predefined measurement interval following the transmitting of the first pulse, wherein arrival of a reflection of the first pulse at a transducer is to be expected;
- and
- transmitting, during the predefined measurement interval, a pulse of a second type differing from the pulses of the first type in modulation.
A device for detection of surroundings, comprising:
- at least one ultrasonic transducer configured to transmit pulses;
- a central unit configured to allocate different modulations to at least one of different transmission times and different transducers;
- at least one ultrasonic transducer configured to detect reflections of transmitted pulses;
- and
- an evaluation unit configured to analyze reflection times for the transmitted pulses, taking into account at least one of different modulations, different transducers and different times of transmission of the respective pulses.
Dependencies are inferred from the claim text.