Method for operating an ultrasonic sensor of a driver assistance system in a motor vehicle, driver assistance system, and motor vehicle
First Claim
1. A method for operating at least one ultrasonic sensor of a driver assistance system in a motor vehicle, comprising:
- modulating an output sound signal of an ultrasonic sensor in accordance with a type of modulation, and via the modulation, impressing a specific codeword on the output sound signal,wherein, for a first driver-assistive functionality of the driver assistance system, at least one selected from a group consisting of a first modulation of the output sound signal of the ultrasonic sensor and a first length of the codeword is used;
wherein, for a second driver-assistive functionality of the driver assistance system, different from the first driver-assistive functionality, at least one selected from a group consisting of a second modulation of the output sound signal of the ultrasonic sensor and a second length of the codeword is used;
wherein the first and the second driver-assistive functionalities are selected from a group consisting of an assistive functionality that controls vehicle movement and an assistive functionality that provides feedback to the driver;
wherein the first driver-assistive, functionality requires a sensing range shorter than the second driver-assistive functionality; and
selecting, based on the shorter sensing range of the first driver assistive functionality, a first length of the codeword shorter than a second length of the codeword for the second-driver-assistive functionality with the longer sensing range, to enable sensing in the shorter and longer sensing ranges, respectively.
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Accused Products
Abstract
The invention relates to a method for operating at least one ultrasonic sensor (4, 6) of a driver assistance system (2) in a motor vehicle (1), wherein an output sound signal (SA) of the ultrasonic sensor (4, 6) is modulated in accordance with a type of modulation and by means of this modulation, a specific codeword is impressed on the output sound signal (SA). For at least two mutually different functionalities (8 to 12) of the driver assistance system (2), different types of modulation are in each case used for the modulation of the output sound signal (SA) and/or in each case different lengths of the codeword.
15 Citations
10 Claims
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1. A method for operating at least one ultrasonic sensor of a driver assistance system in a motor vehicle, comprising:
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modulating an output sound signal of an ultrasonic sensor in accordance with a type of modulation, and via the modulation, impressing a specific codeword on the output sound signal, wherein, for a first driver-assistive functionality of the driver assistance system, at least one selected from a group consisting of a first modulation of the output sound signal of the ultrasonic sensor and a first length of the codeword is used; wherein, for a second driver-assistive functionality of the driver assistance system, different from the first driver-assistive functionality, at least one selected from a group consisting of a second modulation of the output sound signal of the ultrasonic sensor and a second length of the codeword is used; wherein the first and the second driver-assistive functionalities are selected from a group consisting of an assistive functionality that controls vehicle movement and an assistive functionality that provides feedback to the driver; wherein the first driver-assistive, functionality requires a sensing range shorter than the second driver-assistive functionality; and selecting, based on the shorter sensing range of the first driver assistive functionality, a first length of the codeword shorter than a second length of the codeword for the second-driver-assistive functionality with the longer sensing range, to enable sensing in the shorter and longer sensing ranges, respectively. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A driver assistance system for a motor vehicle for providing at least two functionalities in the motor vehicle, comprising:
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at least one ultrasonic sensor; and a controller for driving the ultrasonic sensor, which is designed for causing the ultrasonic sensor to emit an output sound signal, modulated in accordance with a type of modulation, with an impressed specific codeword, wherein, for a first driver-assistive functionality of the driver assistance system, the controller is configured to use at least one selected from a group consisting of a first modulation of the output sound signal of the ultrasonic sensor and a first length of the codeword; wherein, for a second driver-assistive functionality of the driver assistance system, different from the first-driver-assistive functionality, the controller is configured to use at least one selected from a group consisting of a second modulation of the output sound signal of the ultrasonic sensor and a second length of the codeword wherein the first and the second driver-assistive functionalities are selected from a group consisting of an assistive functionality that controls vehicle movement and an assistive functionality that provides feedback to the driver; wherein the first driver assistive functionality requires a sensing range shorter than the second driver-assistive functionality; and wherein the controller is configured to select, based on the shorter sensing range of the first driver assistive functionality, a first length of the codeword shorter than a second length of the codeword for the second-driver-assistive functionality with the longer sensing range, to enable sensing in the shorter and longer sensing ranges, respectively. - View Dependent Claims (10)
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Specification