EP4193174A1 - Erzeugen eines messdatensatzes mittels eines aktiven sensorsystems - Google Patents
Erzeugen eines messdatensatzes mittels eines aktiven sensorsystemsInfo
- Publication number
- EP4193174A1 EP4193174A1 EP21749812.0A EP21749812A EP4193174A1 EP 4193174 A1 EP4193174 A1 EP 4193174A1 EP 21749812 A EP21749812 A EP 21749812A EP 4193174 A1 EP4193174 A1 EP 4193174A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- detector
- sensor system
- view
- measurement data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/28—Details of pulse systems
- G01S7/285—Receivers
- G01S7/292—Extracting wanted echo-signals
- G01S7/2921—Extracting wanted echo-signals based on data belonging to one radar period
- G01S7/2922—Extracting wanted echo-signals based on data belonging to one radar period by using a controlled threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/003—Bistatic radar systems; Multistatic radar systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/42—Simultaneous measurement of distance and other co-ordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/003—Bistatic sonar systems; Multistatic sonar systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/02—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems using reflection of acoustic waves
- G01S15/06—Systems determining the position data of a target
- G01S15/42—Simultaneous measurement of distance and other co-ordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S15/00—Systems using the reflection or reradiation of acoustic waves, e.g. sonar systems
- G01S15/88—Sonar systems specially adapted for specific applications
- G01S15/93—Sonar systems specially adapted for specific applications for anti-collision purposes
- G01S15/931—Sonar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/003—Bistatic lidar systems; Multistatic lidar systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/35—Details of non-pulse systems
- G01S7/352—Receivers
- G01S7/354—Extracting wanted echo-signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/487—Extracting wanted echo signals, e.g. pulse detection
- G01S7/4873—Extracting wanted echo signals, e.g. pulse detection by deriving and controlling a threshold value
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/52—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S15/00
- G01S7/523—Details of pulse systems
- G01S7/526—Receivers
- G01S7/527—Extracting wanted echo signals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/88—Radar or analogous systems specially adapted for specific applications
- G01S13/93—Radar or analogous systems specially adapted for specific applications for anti-collision purposes
- G01S13/931—Radar or analogous systems specially adapted for specific applications for anti-collision purposes of land vehicles
- G01S2013/9327—Sensor installation details
- G01S2013/93271—Sensor installation details in the front of the vehicles
Definitions
- the present invention relates to an active sensor system having a first emitter unit, a second emitter unit, a detector unit and a computing unit, the first emitter unit being set up to emit a first measurement signal into a first emitter space in an area surrounding the sensor system, the second emitter unit being set up to do so , to emit a second measurement signal into a second emission spatial area in the environment, a sensor field of view is given by a first overlapping area of the first emission spatial area with a detector field of view of the detector unit and by a second overlapping area of the second emission spatial area with the detector field of view, the detector unit is set up based on in the sensor field of view reflected portions of the first measurement signal and / or the second measurement signal to generate at least one detector signal and the computing unit is set up based on the at least a detector signal to generate a measurement data set.
- the invention also relates to a system for object characterization with an active sensor system, a method for generating a measurement data set using an active sensor system and a method for
- Active sensor systems are characterized in that they can emit measurement signals and receive measurement signals reflected by an object in order to determine corresponding spatial information about the object or the environment of the sensor system.
- Active sensor systems with a plurality of active sensors for example laser scanners, are known from the prior art. This enables an enlarged detection range of the sensor system and measurement inaccuracies can be compensated for by redundancies if necessary.
- a motor vehicle with a sensor arrangement for 360° detection of an environment is specified.
- the sensor arrangement has a number of sensors of the same type, for example laser scanners. Overlapping detection zones are used in certain areas of the individual sensors redundant sensor data is provided, whereby a higher resolution can be provided in the corresponding areas or measurement uncertainties can be compensated.
- a disadvantage of sensor systems with multiple active sensors is that a spatial area that is shaded by an object in the vicinity of the sensor system, so that measurement signals from one of the sensors cannot reach the area, cannot effectively be used for object detection or object characterization, or only with lower reliability. For example, reflections from this spatial area that are detected with another of the sensors can be incorrectly interpreted as noise, although they are generated by another object in the shaded area.
- an object of the present invention to provide an improved concept for generating a measurement data set using an active sensor system with at least two emitter units, which enables greater reliability in the generation of the measurement data set and/or in the further processing of the measurement data set.
- the improved concept is based on the idea of identifying at least a portion of a sensor field of view of the active sensor system that is shaded with respect to at least one of the emitter units, based on detector signals that are based on reflected portions of measurement signals transmitted by the emitter units. Based on this, the measurement data set can then be generated. Alternatively or additionally, correction data can be generated for the measurement data record or for further processing of the measurement data record.
- the detector unit is set up to generate at least one detector signal based on portions of the first measurement signal and/or the second measurement signal reflected in the sensor field of view, in particular portions reflected by one or more objects in the sensor field of view.
- the arithmetic unit is set up to generate a measurement data record based on the at least one detector signal.
- the arithmetic unit is set up to identify, based on the at least one detector signal, at least one partial area of the sensor field of view that is shaded with respect to the first emitter unit and/or is shaded with respect to the second emitter unit.
- the computing unit is set up to generate the measurement data record taking into account the at least one sub-area and/or to generate correction data for correcting the measurement data record based on the at least one sub-area.
- the measurement signals can be, for example, electromagnetic waves, in particular light waves or radio waves.
- the measurement signals can also be mechanical waves, for example sound waves or ultrasonic waves.
- the first overlapping area can also be understood as the intersection of the first emission space with the detector field of view and the second overlapping area correspondingly as the intersection of the second emission space with the detector field of view. In other words, any point that is both within the first emitter spatial region and within the detector field of view is also within the first overlap region. The same applies to the second overlapping area.
- the sensor field of view can also be understood as the union of the first overlapping area and the second overlapping area.
- any point that is within either the first overlap area or the second overlap area is also within the sensor field of view.
- the detector unit may include one or more detectors, each of the detectors having a corresponding single detector field of view.
- the detector field of view of the detector unit is then given, for example, by the union of all individual detector fields of view. In other words, every point that is in at least one of the individual detector fields of view also lies in the detector field of view of the detector unit.
- a detector signal can be understood, for example, as a time-dependent signal whose amplitude corresponds to an intensity of the portion of measurement signals detected by the detector unit or the respective detector.
- the sensor system can have a one-dimensional or two-dimensional spatial resolution in such a way that the detector unit can differentiate between reflected portions of measurement signals from different angles of incidence. This can be made possible, for example, by the spatial arrangement of the detectors in the detector unit and/or by direction-dependent filter devices and/or by deflection devices which, at specific times, direct only reflected portions of measurement signals from specific directions of incidence to the detector unit.
- a partial area that is shaded with respect to the first emitter unit is not necessarily also shaded with respect to the second emitter unit.
- there is a further object in a sub-area shaded by the first emitter unit then on the side of the further object facing away from the second emitter unit there can be a sub-area which is shaded both with respect to the first and with respect to the second emitter unit. If, in turn, there are further objects in such sub-areas that are shaded with respect to both emitter units, then these cannot be detected by the sensor system if the sensor system does not have further emitter units in addition to the first and the second emitter unit.
- the arithmetic unit or another arithmetic unit which is not necessarily part of the active sensor system, can lower a threshold value for the signal intensity for object detection for signals that correspond to the at least one partial area based on the correction data.
- the arithmetic unit or the additional arithmetic unit can also correct the signal intensity or correct or increase a confidence value for the measurement data record relating to the at least one partial area. In this way, account can be taken of the fact that reflections from objects located in the at least one partial area lead to a reduced signal intensity of the corresponding reflected portions of the measurement signals, since they are at most reached by the first measurement signals or by the second measurement signals, in any case but not by both.
- the fact that the measurement data set is generated taking into account the at least one identified sub-area can be understood, for example, in such a way that measurement data of the measurement data set contain information about whether the corresponding measurement points are within the at least one sub-area or not.
- the improved concept therefore takes into account explicitly shaded sub-areas of the sensor's field of view. This provides more information that can be used by the sensor system or a downstream processing further computing unit, for example a system for object characterization or object recognition, so that the reliability in processing the measurement data set is increased. The reliability of the measurement data set itself is thus increased, or it is made possible to increase the reliability during further processing of the measurement data set.
- the improved concept can make it possible for measurement data relating to the at least one sub-area to be taken into account or to be taken into account in a reliable manner.
- the effectively usable sensor field of view or an effectively usable detection range of the active sensor system is thereby increased.
- the improved concept can also contribute to increased safety.
- active sensor systems are used in motor vehicles, in particular to implement or support functions for partially automated or fully automated motor vehicle control.
- the improved concept increases security by increasing the reliability of the measurement dataset or the processing of the measurement dataset.
- the first emission space area and the second emission space area differ from each other.
- the broadcast space regions overlap.
- the first emitter unit and the second emitter unit are in particular arranged at different positions of the active sensor system.
- the at least one partial area can be identified, for example, by identifying a corresponding object or multiple objects that cause the shadowing or shadowing.
- the computing unit can determine a position and extent of the identified object based on the at least one detector signal. Based on the position and extent of the identified object, the computing unit can determine a spatial area that is shadowed by the object. The intersection of this spatial area with the sensor field of view then corresponds, for example, to a sub-area of the at least one sub-area.
- the first emitter unit and the second emitter unit can also emit the first and the second measurement signal in different ways or with different parameters.
- the first and the second measurement signal can be provided with different time modulations or can be phase-shifted with respect to one another.
- the first and the second measurement signal can also be generated with different wavelengths.
- the detector unit makes it possible for the detector unit to differentiate between the first and the second measurement signal. As a result, the at least one partial area can be identified more easily or more reliably.
- the computing unit is set up to generate an initial measurement data set based on the at least one detector signal, in particular without taking into account the at least one partial area.
- the processing unit or the further processing unit is set up to generate the measurement data record, taking into account the at least one sub-area, based on the initial measurement data record or to generate the measurement data record based on the correction data and the initial measurement data record.
- the active sensor system contains at least one driver circuit which is set up to control the first emitter unit and the second emitter unit to emit the first measurement signal and the second measurement signal.
- the at least one driver circuit can be set up to control the emitter units for the synchronized transmission of the first and the second measurement signal.
- the detector unit not distinguishing between the first and the second measurement signal in order to generate the at least one detector signal.
- the shadowing means that the corresponding detector signal indicates a reduced signal intensity or has a lower amplitude.
- the arithmetic unit or the further arithmetic unit can correct the amplitude or the signal intensity or lower a corresponding threshold value for the signal intensity, in particular based on the correction data.
- the at least one driver circuit is set up to control the emitter units for the asynchronous transmission of the measurement signals.
- the detector unit is then set up, for example, to detect the first measurement signals and the second measurement signal independently of one another.
- the object is then detected, for example, only by means of the first measurement signals or only by means of the second measurement signals.
- the computing unit or the further computing unit can then, for example, increase a confidence value for the detection of the object. In this way, account can be taken of the fact that it is not noise or another error that causes the object to be only partially detected, but rather the fact that the at least one partial area is shaded with respect to the first or the second emitter unit.
- the arithmetic unit is set up to calculate at least one first sub-area based on the at least one detector signal of the sensor field of view which is shadowed with respect to the first emitter unit and which is not shadowed with respect to the second emitter unit, in particular in order to identify the at least one partial area.
- identifying the at least one portion includes identifying the at least one first portion.
- the at least one first partial area If there is an object in the at least one first partial area, it can be detected by the sensor system in that the second measurement signal is emitted by the second emitter unit, is reflected by the object and is detected by the detector unit. However, since this object is not reached by the first measurement signal, a corresponding signal intensity of the at least one detector signal will be reduced, for example, or, depending on the embodiment of the sensor system, a confidence value for detecting the object will be reduced. Because the at least one first subarea is identified in corresponding embodiments, this can be taken into account when generating the measurement data set or the correction data, so that such objects can also be reliably detected or the information about the existence of the object in the at least one first subarea in the further processing of the measurement data set can be taken into account accordingly.
- the detector unit is set up to generate at least one first detector signal based on portions of the second measurement signal reflected by an object in the at least one first partial area and/or based on portions of the second measurement signal reflected by a further object in the at least one further first partial area Proportions of the first measurement signal to generate at least one further first detector signal.
- the computing unit is set up to determine a first signal intensity based on the at least one first detector signal, the first signal intensity according to a predetermined first To modify the correction rule and to generate the measurement data set depending on the modified first signal intensity.
- the specified first correction rule can be part of the correction data, for example, or can have been specified in advance.
- the modification of the first signal intensity includes in particular an increase or enlargement of the value of the first signal intensity, in particular to take into account that the first measurement signal does not contribute to the generation of the at least one first detector signal, but only the second measurement signal.
- modifying may include multiplying the first signal intensity by a correction term or adding a correction term to the first signal intensity.
- the correction term can be constant or can be defined according to a predetermined characteristic of the sensor system.
- the characteristic can be stored, for example, in a memory unit of the sensor system, for example in the form of a lookup table.
- the first signal intensity can be multiplied by a constant factor, for example, in order to take into account the absence of the reflected components of the first measurement signal.
- the corresponding parts of the measurement data set can be sufficiently or appropriately taken into account during further processing, for example when comparing the value of the signal intensity with a threshold value, for example to distinguish actual measurement data from noise.
- Objects located in the at least one first subregion can then be taken into account with greater reliability or only when processing or creating the measurement data set, which leads to a more reliable measurement data set or more reliable processing of the measurement data set overall.
- the computing unit is set up to determine a measurement point, in particular for the object in the at least first partial area, and a confidence value for the measurement point based on the at least one first detector signal.
- the arithmetic unit is set up to modify the confidence value in accordance with a predefined second correction rule and to generate the measurement data set as a function of the measurement point and the modified confidence value.
- the measurement point contains in particular data relating to the position of the object or a part of the object, ie in particular two- or three-dimensional coordinates.
- the measurement point is saved in the measurement data set together with the confidence value.
- the confidence value can be viewed as a measure of the probability that the measurement point, ie its existence or position, is correct.
- the modification of the confidence value contains in particular the increase of the confidence value, ie in particular a further correction term is added to the confidence value or multiplied by the confidence value in order to modify the confidence value.
- the first information allows an assignment as to which measurement points of the measurement data set are due to reflections of the second measurement signal, which originate from the at least one first sub-area.
- the first information can be part of the correction information, for example.
- the fact that the at least one first partial area is shaded can be taken into account during further processing of the measurement data set.
- the at least one first partial area can thereby be communicated to the further processing unit as an area with lower trustworthiness or reduced performance.
- the computing unit is set up to identify at least one second partial area of the sensor field of view, which is shaded with respect to the first emitter unit and which is shaded with respect to the second emitter unit, based on the at least one detector signal.
- the area of the field of view lying directly behind this object with respect to the second emitter unit can then be shaded with respect to both emitter units, for example.
- the existence of the at least one second sub-area can be taken into account and thus also the potential possibility that there are other objects in the at least one second sub-area which, however, cannot be detected despite the redundancy of the first and the second emitter unit.
- the at least one second partial area can therefore be taken into account as an area with little or no confidence or trustworthiness when creating or processing the measurement data record.
- the at least one second partial area can be identified, for example, in such a way that it is shaded with respect to all emitter units of the sensor system.
- the processing unit is set up to generate second information for assigning the at least one second partial area to at least one corresponding second part of the measurement data record and to transmit it to the further processing unit.
- the detector unit has a first detector with a first field of view and a second detector with a second field of view.
- the detector field of view given by the first field of view and the second field of view.
- the detector field of view corresponds to a union of the first and second fields of view, or in other words, any point that is in the first field of view or in the second field of view is also in the detector field of view.
- the detector unit has a large number of detectors with respective associated individual fields of view and the detector field of view is given by all individual fields of view, ie in particular by a union of all individual fields of view.
- the active sensor system is designed as a lidar system, in particular as a flash lidar system or as a laser scanner.
- the emitter units then each contain in particular one or more light sources, in particular laser diodes, for example infrared laser diodes.
- the detector unit or the individual detectors of the detector unit then each contain, for example, one or more photodiodes, for example avalanche photodiodes.
- the active sensor system is designed as a radar system.
- a system for object characterization is also specified.
- the system has an active sensor system based on the improved concept, as well as a further computing unit that is set up to recognize or characterize an object, in particular the object in the at least one first partial area, in the sensor field of view based on the measurement data set to characterize the measurement data set and the correction data.
- the further processing unit can contain the processing unit partially or completely.
- the processing unit or the further processing unit is set up to correct the measurement data set based on the correction data and the further processing unit is set up to do this to characterize the object based on the corrected measurement data set.
- the processing unit is set up to generate first information for assigning the at least one first partial area to at least one corresponding first part of the measurement data record and to transmit it to the further processing unit.
- the further processing unit is set up to characterize the object, which is located in the at least one first partial area, depending on the first information and/or to initiate a risk-reducing measure depending on the first information.
- the further arithmetic unit is set up to modify, in particular to lower, a threshold value for object recognition with regard to the at least one first partial area as a function of the first information.
- the processing unit is set up to generate the second information for assigning the at least one second partial area to the at least one corresponding second part of the measurement data record and to transmit it to the further processing unit.
- the further computing unit is set up to characterize the object based on the second information and/or to initiate a further risk-reducing measure based on the second information.
- a motor vehicle is also specified that contains an active sensor system or a system for object characterization according to the improved concept.
- the first emitter unit and the second emitter unit are installed in different positions of the motor vehicle, for example.
- At least one detector signal is generated, in particular by means of the detector unit, based on portions of the first measurement signal and/or the second measurement signal reflected in the sensor field of view.
- the measurement data set is generated based on the at least one detector signal, in particular by means of a computing unit of the active sensor system. Based on the at least one detector signal, at least one partial area of the sensor's field of view is identified, in particular by means of the computing unit, which with respect to the first emitter unit and/or is shaded with respect to the second emitter unit.
- the measurement data set is generated, in particular by means of the computing unit, taking into account the identified at least one sub-area and/or correction data for correcting the measurement data set are generated based on the at least one sub-area.
- an active sensor system according to the improved concept is set up to carry out a method for generating a measurement data set according to the improved concept and it carries out such a method.
- a method for object characterization using an active sensor system is also specified.
- a measurement data set is generated by means of the active sensor system according to a method for generating a measurement data set according to the improved concept and an object in the sensor field of view is characterized based on the measurement data set, in particular by means of a further processing unit, based on the measurement data set or based on the measurement data set and characterized by the correction data.
- a system for object characterization according to the improved concept can be set up or programmed to carry out a method for object characterization according to the improved concept, or it carries out such a method.
- the computer program, the additional computer program and the computer-readable storage medium can each be regarded as a computer program product with the corresponding instructions.
- the active sensor system 1 shows a system T for object characterization according to the improved concept, which has an active sensor system 1 according to the improved concept.
- the active sensor system 1 is designed as a lidar system in the present case.
- the sensor system 1 also has a computing unit 4, which can be designed as a control and processing unit, for example.
- the computing unit 4 can control the emitter units 2, 2' and/or the detector unit 3.
- the emitter units 2, 2' and the detector unit 3 can have corresponding driver circuits, for example, or such driver circuits can be included in the computing unit 4.
- Objects 04, 03, 04 which are located both in the first and in the second overlapping area SF1, SF2, can basically be reached by the first measurement signal and by the second measurement signal, they reflect and the detector unit 3 can detect the corresponding reflections.
- the detector unit 3 has a first detector field of view D1 and the further detector unit 3' has a second detector field of view D2.
- the union of the detector fields of view D1, D2 forms the detector field of view D here.
- the further processing unit 5 can then process the corrected measurement data or the measurement data set in a correspondingly reliable manner.
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- Engineering & Computer Science (AREA)
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- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Acoustics & Sound (AREA)
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Abstract
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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102020120542.2A DE102020120542A1 (de) | 2020-08-04 | 2020-08-04 | Erzeugen eines Messdatensatzes mittels eines aktiven Sensorsystems |
| PCT/EP2021/070947 WO2022028945A1 (de) | 2020-08-04 | 2021-07-27 | Erzeugen eines messdatensatzes mittels eines aktiven sensorsystems |
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| Publication Number | Publication Date |
|---|---|
| EP4193174A1 true EP4193174A1 (de) | 2023-06-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| EP21749812.0A Pending EP4193174A1 (de) | 2020-08-04 | 2021-07-27 | Erzeugen eines messdatensatzes mittels eines aktiven sensorsystems |
Country Status (4)
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|---|---|
| US (1) | US20230324513A1 (de) |
| EP (1) | EP4193174A1 (de) |
| DE (1) | DE102020120542A1 (de) |
| WO (1) | WO2022028945A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006004019B3 (de) * | 2006-01-27 | 2007-03-08 | Audi Ag | PMD-System und Verfahren zur Abstandsmessung von einem Objekt |
| DE102014004787A1 (de) * | 2014-04-02 | 2015-10-08 | Audi Ag | Erfassungseinrichtung, insbesondere zur Nutzung in einem Kraftfahrzeug und Kraftfahrzeug |
| DE102014115310A1 (de) * | 2014-10-21 | 2016-04-21 | Infineon Technologies Ag | Bilderzeugungsvorrichtungen und ein Laufzeit-Bilderzeugungsverfahren |
| US20180067195A1 (en) * | 2016-09-08 | 2018-03-08 | Qualcomm Incorporated | Multi-tier light-based ranging systems and methods |
| DE102016220075A1 (de) | 2016-10-14 | 2018-04-19 | Audi Ag | Kraftfahrzeug und Verfahren zur 360°-Umfelderfassung |
| WO2019064062A1 (en) * | 2017-09-26 | 2019-04-04 | Innoviz Technologies Ltd. | SYSTEMS AND METHODS FOR DETECTION AND LOCATION BY LIGHT |
| US10830887B2 (en) * | 2018-01-23 | 2020-11-10 | Aptiv Technologies Limited | Object sensor assembly including stereoscopic cameras and range finders |
| CN112969937A (zh) * | 2018-10-19 | 2021-06-15 | 创新科技有限公司 | Lidar系统和方法 |
| WO2021026518A1 (en) * | 2019-08-08 | 2021-02-11 | Neural Propulsion Systems, Inc. | Distributed aperture optical ranging system |
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2020
- 2020-08-04 DE DE102020120542.2A patent/DE102020120542A1/de active Pending
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2021
- 2021-07-27 US US18/019,159 patent/US20230324513A1/en active Pending
- 2021-07-27 WO PCT/EP2021/070947 patent/WO2022028945A1/de not_active Ceased
- 2021-07-27 EP EP21749812.0A patent/EP4193174A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022028945A1 (de) | 2022-02-10 |
| DE102020120542A1 (de) | 2022-02-10 |
| US20230324513A1 (en) | 2023-10-12 |
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