EP4540623A1 - Verfahren zum ermitteln einer eine objekthöhe beschreibenden objektinformation - Google Patents
Verfahren zum ermitteln einer eine objekthöhe beschreibenden objektinformationInfo
- Publication number
- EP4540623A1 EP4540623A1 EP23728266.0A EP23728266A EP4540623A1 EP 4540623 A1 EP4540623 A1 EP 4540623A1 EP 23728266 A EP23728266 A EP 23728266A EP 4540623 A1 EP4540623 A1 EP 4540623A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- distance
- sensor
- height
- amplitude
- determined
- 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
-
- 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
-
- 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
-
- 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
- G01S7/41—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
- G01S7/411—Identification of targets based on measurements of radar reflectivity
Definitions
- the invention relates to a method for determining object information describing at least one object height of an object by means of a sensor device comprising at least one distance sensor, the object and the distance sensor moving relative to one another and the distance sensor emitting a signal at different distances from the object, which is transmitted to the object Object is reflected and received again as an echo by the distance sensor.
- Distance sensors usually include a transmitting device, which sends out signals, and a receiving device, which receives signals reflected from objects in the environment as echoes.
- the distance or in other words, the distance to the object, can be determined based on a transit time difference between the time of sending the signal and the time of receiving the echo, taking into account the speed of propagation of the signal.
- the amplitude of the reflected signal or echo can also be determined here.
- Such distance sensors can usually be used in motor vehicles to detect the surroundings.
- Ultrasonic sensors for example, are particularly important and can be used in semi-automatic or automatic driving maneuvers, especially in connection with parking applications, such as parking distance measurement, parking space searches or when parking.
- the motor vehicle is usually moved relative to the objects, with a measurement cycle being carried out at predetermined times during the movement. During each measurement cycle, a signal is sent out using a distance sensor.
- the height of the object is also usually important. Height is an important factor in deciding whether an object or obstacle can be driven over or not. In particular, if the motor vehicle is maneuvered at least semi-autonomously based on the measurements of an ultrasonic sensor, it is desirable to determine the height of a detected object.
- Determining height with one-dimensional (1 D) distance sensors i.e. ultrasonic sensors or radar sensors for distance determination, which are regularly used in the motor vehicle sector, is fundamentally quite difficult due to physical limitations.
- ultrasonic sensors i.e. ultrasonic sensors or radar sensors for distance determination, which are regularly used in the motor vehicle sector
- the height of an object cannot be measured directly.
- a camera is additionally used and the height is estimated based on a 2D image, or a method based on several sensors is used to estimate the height based on triangulation.
- methods based on a camera or multiple sensors do not take advantage of the advantages of a 1 D ultrasonic sensor in terms of cost and robustness.
- Various approaches are known from the prior art for determining height using distance sensors.
- ultrasonic signals are sent out by means of the ultrasonic sensor of the motor vehicle and the echoes of the ultrasonic signals reflected by the objects are received. Based on an amplitude of a received echo, the classification of the height of the object is determined.
- the present invention is based on the object of specifying an improved method for determining object information describing an object height of an object, which in particular enables a more precise determination of the object height.
- This object is achieved according to the invention in a method of the type mentioned at the outset in that a course of an amplitude of several of the echoes is determined over the distance, the object information being determined as a function of at least one distance-dependent amplitude change rate determined from the course of the amplitude.
- the sensor device or the at least one distance sensor can be mounted on a vehicle, for example.
- the distance sensor can be designed as an ultrasonic sensor or as a radar sensor.
- a relative movement between the distance sensor and the object can occur, for example, when the vehicle moves relative to the object.
- the object can be stationary or also move relative to the vehicle.
- the object can be another road user, for example another vehicle, or an infrastructure object, for example a curb, a wall or a section of a building such as a garage or similar.
- the distance sensor During the relative movement between the distance sensor and the object, for example when the distance sensor approaches the object or when the distance sensor moves away from the object, several signals are emitted one after the other by the distance sensor. Due to the relative movement, the signals are displayed in different ways Distances or at different distances between the distance sensor and the object.
- the signals emitted by the distance sensor are reflected on the object and then received again as echoes by the distance sensor.
- the received echoes each have an amplitude or signal strength, whereby the amplitude can differ in particular for different echoes.
- the amplitude can depend, among other things, on the distance between the distance sensor and the object.
- the amplitudes of the received echoes can be determined, for example, by the distance sensor and/or by a computing device of the sensor device. Furthermore, a distance to the object is determined for each of the echoes. The distance determination can be determined, for example, from a transit time of the signal, i.e. the time period between the transmission of the signal and the reception of the associated echo. From the respective amplitudes of the echo and from the distances, the computing device, for example, determines a distance-dependent course of the amplitude of the received echoes. The object information of the object is then derived from the distance-dependent amplitude change rate, which is determined from the determined course.
- the invention is based on the knowledge that, in addition to the distance between the distance sensor and the object, the height of the object also has an influence on the amplitude, in particular on the distance dependence of the amplitude.
- the object height describes in particular a relative height in relation to the distance sensor and/or a vertical extent of the object in relation to the distance sensor.
- Objects with different object heights relative to the sensor reflect the signals emitted by the distance sensor depending on the distance between the distance sensor and the object in different subareas of a vertical detection range of the distance sensor.
- This vertical detection range is determined, for example, by the elevation angle of the Signal emission determined. Since the vertical detection sub-area or the elevation angle sub-area in which the object lies and into which the signals are emitted or from which the echoes are received depends on both the object height and the distance, the received echoes from objects with different object heights have one different, distance-dependent course of the amplitude.
- distance sensors such as ultrasonic or radar sensors generally radiate most of their power horizontally, i.e. at an elevation angle of zero, the amplitude of the echoes reflected from the object decreases.
- the distance between the distance sensor and the object decreases, so that the proportion of power emitted into free space areas (free space loss) also decreases, which results in an increase in the amplitude of the reflected echoes. Both effects overlap and thus cause the echo amplitude to change over distance depending on the object properties.
- the object information can be determined depending on sensor information stored, for example, in the computing device, wherein the sensor information can include a description of the radiation characteristics of the distance sensor. For objects with a comparatively complex geometry, for example vehicles, several amplitude change rates can also be determined, particularly for individual distance sub-ranges.
- object information regarding an object height can also be obtained.
- the environment data obtained using such sensors can advantageously contain objects supplemented by the respective object information, so that a more precise determination of the environment is possible without the need for additional sensors.
- the inventive evaluation of the distance-dependent amplitude change rate thus increases the amount of data obtained via the distance sensor, so that the signals can be used in addition to measuring the distance to obtain further information about objects present in the vicinity of a vehicle.
- the sensor device comprising the distance sensor can also be used in industrial processes, for example in manufacturing processes, in the movement of autonomous machines or machine parts or the like.
- the object information contains an absolute object height in relation to a reference position, in particular to a position of the distance sensor, a vertical extent of the object and/or an assignment of the object to one of several, each different object heights and/or different vertical extents of objects comprehensive height classes.
- the sensor height or an installation height of the distance sensor can be used as a reference position.
- the object height can be determined as an absolute height difference between the sensor height and the object height. It is also possible to use a different reference height, for example the height of a road on which a vehicle comprising the sensor device is located.
- the object height can be determined as an assignment of the object to one of several height classes (e.g. low objects, medium-high objects and high objects, etc.).
- objects with different object heights and/or different vertical extents for example curbs, walls, cars, beams hanging at a vertical distance from the ground or the like, can advantageously be distinguished and classified accordingly.
- three or more classes are provided for the object height, which correspondingly include objects with different object heights and/or different vertical dimensions.
- an object for example a first object height based on a lower edge of an object, for example a guardrail, and a two object height based on the upper edge of the object, if both the lower edge and the upper edge are at least from one certain distance within the detection range of the distance sensor.
- the object it is possible for the object to be classified accordingly as a guard rail, a beam, a fence or a comparable object.
- the vertical extent of the object can be taken into account and, for example, an object arranged at a distance above the road, such as a guard rail, can be distinguished from a structure that extends continuously from the ground to an object height, such as a wall or a wall.
- the object information is determined depending on the amount of an increase and/or a decrease in the amplitude change rate as the distance decreases becomes.
- an increase in the rate of change in amplitude as the distance decreases is understood to mean an increasingly steep increase in the amplitude as the distance sensor approaches the object.
- a decrease in the rate of change of amplitude is to be understood as meaning an ever-increasing decrease in the amplitude of the echoes as the distance sensor approaches the object.
- the increase and decrease in amplitude can take place over the entire distance depending on the height of the object or the vertical extent of the object or can occur in different partial areas of the distance, i.e. within different distance intervals.
- a relative object height of the object described by the object information in relation to a sensor height of the distance sensor increases with a decreasing amount of an increase and / or decrease in the amplitude change rate as the distance decreases.
- the less the amplitude changes when approaching the object the further above or below the sensor the object is arranged.
- the height difference between the object and the distance sensor becomes smaller and smaller the more the slope of the amplitude changes over the distance.
- the object information is determined depending on a turning point distance assigned to a turning point of the amplitude change rate.
- the turning point represents the distance at which a transition occurs between a rising rate of change in amplitude and a falling rate of change in amplitude or the rate of change in amplitude has a zero point. Accordingly, the amplitude plotted against the distance has a high point or a low point at the position or distance of the inflection point.
- a relative object height of the object described by the object information is related to a sensor height of the object Distance sensor increases with increasing turning point distance.
- the closer the distance at which the turning point occurs from the object the greater the relative height difference between the object height and the sensor height.
- the relative height difference between the object and the distance sensor is always smaller, the smaller the distance assigned to the turning point is.
- the object height and/or an object type of the object information assigned to the object depends on a variance of the amplitude change rate at least within a limited distance range and/or depending on a variance of the amplitudes of several, within a distance or one Limited distance range of received echoes is determined.
- the variance of the amplitudes of the individual echoes represents a measurement error that arises for several echoes assigned to a distance. Due to the variance in the amplitudes of the echoes, each of which is viewed as a measuring point, a variance can also arise for the rate of change in amplitude.
- the extent of this variance which is represented, for example, as a spread of the amplitudes for a distance or a distance range or a distance interval, can also be used as an indication of the nature of the object.
- the object information can therefore be determined taking into account the variance of the amplitude change rate within one or more distance intervals and/or taking into account the variance of the amplitudes for one or more individual distances and/or within one or more distance intervals.
- the object information can also describe an object type assigned to the object, the object type depending on a variance of the amplitude change rate within one or more limited distance ranges or distance intervals and / or depending on a variance of the amplitudes of several, within a distance or one or several limited distance ranges of received echoes can be determined.
- the object type can, for example, indicate whether the object is a wall, another vehicle such as another car, a cyclist or the like.
- Other distinguishable object types can also be curbs, crash barriers, fences or sections of buildings, for example roof or support beams of a garage, or structures such as bridges or similar.
- the object height and/or the object type are additionally or alternatively determined as a function of the distance errors assigned to the individual echoes.
- the distances assigned to the echoes used as measuring points can also have an error, which can be attributed, for example, to an external condition of the object, so that additional information about the object height and/or the object type can be obtained from the evaluation of the respective distance error.
- the object information in particular the object height and/or the object type, can also be determined from a set of measurement points assigned to one or more objects depending on the echoes assigned to the object.
- the number of echoes or measuring points received from an object also offers the possibility of drawing conclusions about the object height and/or an object type of the object, so that these can also be used to improve the determination of object height and/or object type.
- the square of an object height is determined as object information and/or that an object type assigned to the object is determined depending on the variance of the squared object height.
- an object type assigned to the object for example, a height value describing a squared object height and a variance of this height value can be determined from two or more individual measuring points that were recorded at different distances from the object. The object information or the object height and/or the object type can then additionally be determined depending on the height value.
- the amplitude of the received echoes is normalized for determining the course over the distance and/or as a function of directional information assigned to the object.
- the directional information can include the azimuth angle assigned to the respective echo, so that different radiation characteristics of the distance sensor in the azimuth direction can be taken into account.
- the determination of the object information from the distance-dependent amplitude curve or the distance-dependent amplitude change rate can be carried out in the same way for all sub-areas of the detection area in the azimuth direction.
- the evaluation of other properties of the echoes, in particular those that depend on the distance, such as the variance in distance and/or amplitude, can also be made easier by normalizing the distance. This can advantageously reduce the computing effort for determining the object information for several, differently arranged objects.
- the object information is additionally determined depending on a directional variance assigned to the echoes.
- a directional variance that occurs when multiple echoes are reflected from an object can also provide information about the object's height and/or give an object type, so that the directional variance can also be advantageously taken into account when determining the object information.
- the object information is additionally determined depending on the occurrence of at least one further echo, the further echo having an integer multiple of this transit time, based on an echo assigned to a distance based on its transit time. Echoes that have an integer multiple of the transit time of another echo are also referred to as multiples. These can occur in particular due to multiple reflections between the distance sensor, or a device comprising the distance sensor, and the object. The occurrence and/or the number of multiple reflections occurring and thus also the occurrence of the multiples can depend on an object height of the object, so that the accuracy of the determination of the object information can advantageously be further increased by taking them into account.
- the object information is determined from the amplitude change rate as a function of an assignment rule, with an assignment rule determined by machine classification being used.
- the assignment rule can, for example, be stored in the computing device.
- a decision tree, a neural network, a naive Bayes classifier, a support vector machine (SVM) or similar can be used as a classifier.
- an actuator and/or a display device that can be viewed by a user of a device comprising the sensor device can be controlled depending on the height information.
- the device can, for example, be designed as a vehicle, wherein at least one transverse guidance actuator and/or one longitudinal guidance actuator can be controlled depending on the height information.
- the control of the at least one actuator can, for example, as part of a partially automated or automated driving maneuvers.
- the height information can also be displayed to a user of the vehicle on a display device, for example a display, in particular as part of an environment map that at least partially represents the surroundings of the motor vehicle.
- a computer program product comprises commands which, when the program is executed by a computing device of a sensor device comprising at least one distance sensor, cause the computing device to carry out a method according to one of the preceding claims.
- a computing device used to carry out the method can in particular be connected to the distance sensor in a communicative manner, with the distance sensor transmitting measured value information describing the echoes, in particular the respective amplitude and the distance assigned to the respective echo, to the computing device.
- the method according to the invention can be implemented as a computer-implemented method.
- the computing device can be a computer, for example.
- the computing device can be designed, for example, as a microcontroller or as a control device.
- the computing device can only be designed to carry out the method according to the invention or it can be a computing device which can also carry out other methods and/or functions, for example a central computing unit of a vehicle or another device.
- the computing device can be arranged with the distance sensor in a common device, for example a vehicle. It is also possible for the computing device to be arranged spatially separate from the sensor device, whereby the computing device can be designed as a server, for example.
- the computer program product can be stored on a computer-readable data carrier, for example a CD, a USB stick or similar be transferable via a communication connection, for example as a download from the Internet
- a sensor device For a sensor device according to the invention it is provided that it comprises at least one distance sensor and a computing device, the computing device being set up to form a method according to the invention.
- a vehicle according to the invention it is intended for a vehicle according to the invention to comprise a sensor device according to the invention.
- FIG. 1 shows an exemplary embodiment of a vehicle according to the invention, comprising a sensor device according to the invention
- FIG. 2 shows a first diagram in which distance-dependent amplitude curves calculated for several objects with different object heights are shown
- 3 - 6 further diagrams, each of which shows measured values of an ultrasonic sensor recorded for a different object.
- the vehicle 1 is designed, for example, as a passenger car or as another type of land vehicle.
- the vehicle 1 includes a sensor device 2, which communicates with at least one distance sensor 3 and one connected computing device 4 includes.
- the sensor device 2 can in particular have several distance sensors 3, with only one distance sensor 3 being shown here for the sake of clarity.
- the distance sensor 3 can be designed, for example, as an ultrasonic sensor or as a radar sensor.
- the computing device 4 can be, for example, a control device or a central computing unit of the vehicle 1. It is also possible for the computing device 4 to be integrated into the distance sensor 3 or to form a common structural unit with the distance sensor 3. Alternatively, the computing device 4 can be a vehicle-external computing device 4, for example a server, which is arranged outside the vehicle 1 and communicates with the distance sensor 3 via a communication connection, for example the Internet. In addition to a method for determining object information, the computing device 4 can also carry out other methods and/or functions.
- the distance sensor 3 is designed to send out signals 5 and to receive signals 5 reflected on an object 6 as echoes 7.
- the object 6 can be, for example, a beam or a beam-like section of a building, which is arranged at a vertical distance from a road surface 12.
- the object 6 has an object height or a vertical extent, which in the present case is characterized by the width of the object in the height direction z and by the height of the lower edge and the upper edge of the object in the z direction above the road surface 12.
- the vehicle 1 moves towards the object 6 in the scene shown in FIG.
- the object 6 is shown in a first position 8.
- the object 6 is also shown in dashed lines in a second position 9, the object 6 being in the first position 8 at a greater distance r from the vehicle 1 than in the second position 9.
- a detection area 10 of the distance sensor 3 is shown schematically, which in the present case extends in the vertical direction z over an elevation angle range. It can be seen that the part of the elevation angle range in which the object 8 is located changes with the distance or the distance between the object 6 and the vehicle 1.
- a further object 11 in the present case arranged below the distance sensor 3, which also covers different sub-areas of the detection area 10 in the first position 8 and in the second position 9.
- the further object 11 can be, for example, a curb, the object height or vertical extent of which is determined by the distance of its upper edge from the road surface 12.
- the amplitude of the echoes 7 reflected by one of the objects 6, 11 also changes depending on the distance r between the object 6, 11 and the vehicle 1. Since the majority of the power in an ultrasonic or radar sensor is generally emitted in a horizontal direction, the amplitude of the echo 7 usually decreases due to the changed coverage of the elevation angle range as the vehicle 1 approaches. At the same time, however, due to the decreasing distance to the object, the proportion of power emitted into free areas of space also decreases, which results in an increase in the amplitude of the reflected echoes 7.
- J can be assumed to be proportional to a sine function or Si function (sin(i
- Si function sin(i
- the distance-dependent amplitude curve is shown for five different objects 6, 11, each of which has a different relative object height in relation to the distance sensor 3.
- the amplitude curve shown with a solid line corresponds to an object height of 0, i.e. the object on which the echoes 7 received by the distance sensor were reflected has the same height as the distance sensor.
- the amplitude curve shown with a dashed line corresponds to an object height of 0.1 m, so the object on which the echoes 7 were reflected is located 10 cm above or below the distance sensor 3.
- the amplitude curve shown by circles corresponds to an object height of 0.5 m, the amplitude curve of an object height of 1 m shown by crosses and the amplitude curve of an object height of 1.5 m shown by squares. To simulate the amplitude curves shown, a single point at the respective object height was considered as an object.
- the amplitude curves have an amplitude change rate that depends on the object height, i.e. a slope that depends on the object height.
- the change in the rate of change of amplitude over distance, i.e. the change in slope, is also different for the different object heights.
- the amplitude curves shown can be determined by the computing device 4 during a movement of the vehicle 1 relative to the object 6, 11.
- the computing device 4 is designed to carry out a method for determining object information describing at least one object height of the objects 6, 11, the distance sensor 3 emitting a signal 5 during this movement at different distances from the object 6, 11, which is transmitted to the object 6 , 11 reflected and as an echo 7 of that Distance sensor 3 is received again.
- the distance sensor 3 can determine the amplitude of the echo 7 and transmits this to the computing device 4.
- the distance sensor 3 or the computing device 4 can, for example, determine a distance from a transit time of the signal 5 or the echo 7.
- the computing device 4 determines a distance-dependent amplitude curve from the amplitudes of several echoes 7 and the associated distances. Furthermore, the computing device is set up to determine object information describing at least one object height of the object 6, 11 depending on a distance-dependent amplitude change rate determined from the course of the amplitude.
- the computing device 4 can, as part of the object information, contain an absolute object height in relation to a reference position, a vertical extent of the object 6, 11 and/or an assignment of the object 6, 11 to one of several, each different object heights and/or different vertical extents Determine height classes comprising objects.
- the sensor height above the road 12 or an installation height of the distance sensor 3 in the vehicle 1 can be used as a reference position.
- the object height can be determined as an absolute height difference between the sensor height and the object height, as was done for the different objects in FIG. 2, for example.
- the object height can be determined as an assignment of the object 6, 11 to one of several height classes (eg low objects, medium-high objects and high objects, etc.).
- the object 6 designed as a bar could, for example, be viewed as a high object, whereas the object 11 designed as a curb can be classified as a low object.
- a vertical extent, ie the height of a lower edge and the height of an upper edge of the object 6, 11, can also be determined as object information become.
- the objects 6, 11 can also be classified depending on the vertical extent of the objects 6, 11.
- different types of objects 6, 11 with different object heights and/or different vertical dimensions for example curbs, walls, cars, guardrails, beams or the like hanging at a vertical distance from the ground, can be distinguished and classified accordingly.
- at least three different classes are provided for the object height, which are used accordingly for the classification of objects 6, 11 with different object heights and/or different vertical dimensions.
- the object information can be determined by the computing device 4 depending on the amount of an increase and/or a decrease in the rate of amplitude change as the distance decreases.
- the increase in the amplitude change rate, at least up to a turning point in the amplitude change rate, and/or the decrease in the amplitude change rate from this point are dependent on the object height of the object 6, 11 and thus allow the object information to be determined from a measured or recorded amplitude curve.
- a relative object height of the object 6, 11 described by the object information in relation to the sensor height of the distance sensor 3 increases with a decreasing amount of increase and/or decrease in the amplitude change rate as the distance decreases, that is to say with a flatter course of the distance-dependent amplitude change rate.
- the computing device 4 can determine the object information depending on a turning point distance rw assigned to a turning point 13 of the amplitude change rate.
- the turning point 13 and the associated turning point distance rw.i or rw,2 are shown for two of the amplitude curves.
- a relative object height of the object 6, 11 described by the object information in relation to a sensor height of the distance sensor obviously increases as the turning point distance increases, so that the determination of the object height can advantageously be carried out depending on the turning point distance.
- FIGS. 3 - 6 show amplitude curves recorded for different objects with different object heights using a distance sensor 3 designed as an ultrasonic sensor.
- FIG. 3 shows the distance-dependent amplitude curve of the echoes 7, which are reflected on a hanging beam with a relative object height of 2 m in relation to the distance sensor. Furthermore, two linear fits 14, 15 of the echoes 7 each representing individual measuring points are shown. The linear fits 14, 15 were determined for two adjacent distance sub-ranges. The slope of the linear fits 14, 15 or the straight line corresponds to the rate of amplitude change in the different distance sub-ranges within which the measured values were approximated using one of the linear fits 14, 15. Also shown is the turning point 13 with the assigned turning point position rw.
- Fig. 4 shows the distance-dependent amplitude curve of the echoes 7, which were reflected on a curb with a relative object height in relation to the distance sensor of 0.4 m. Furthermore, here too there is a turning point 13 of the amplitude change rate with the associated turning point position rw and two Linear fits 16, 17 are shown, each of which was determined for a partial range of distances from the individual echoes 7.
- FIG. 5 shows the distance-dependent amplitude curve of the echoes 7 for a wall that extends vertically over the entire detection range in the distance interval under consideration.
- a turning point 13 of the amplitude change rate with the associated turning point position rw as well as two linear fits 18, 19 are shown here, each of which was determined for a partial distance range from the individual echoes 7.
- Fig. 6 shows the distance-dependent amplitude curve of the echoes 7, which were reflected on a third-party vehicle (car).
- the third-party vehicle extends vertically over the entire detection range of the distance sensor 3 in the distance interval under consideration. Furthermore, there is a turning point 13 of the amplitude change rate with the associated turning point position rw and four linear fits 20 - 23 are shown, each of which was determined for a partial distance range from the individual echoes 7.
- the external vehicle has a more complex geometry than the other objects previously recorded in FIGS. can be determined.
- the computing device 4 can evaluate further properties of the amplitude curves or the echoes 7 used as measuring points.
- the computing device 4 can, for example, determine the object height and/or an object type of the object information assigned to the object 6, 11 depending on a variance of the amplitude change rate at least within a limited distance range and/or depending on a variance of the amplitudes of several, within a distance or a limited distance range Determine received echoes 7.
- the extent of the variance of the amplitudes which occurs, for example, as a scattering of the amplitudes for a distance or a distance range or a distance interval in FIGS. 3 - 6, can also be used as an indication of the nature of the object 6, 11.
- the variance of the amplitudes for a given distance or for several distances within a distance interval means that, for example, the possible linear fits can also have a variance, this variance correspondingly representing a variance of the rate of amplitude change.
- the object information can therefore be determined by the computing device 4 taking into account the variance of the amplitude change rate within one or more distance intervals and/or taking into account the variance of the amplitudes for one or more individual distances and/or within one or more distance intervals.
- a variance in the amplitudes of several echoes 7 and/or a variance in the rate of amplitude change can be taken into account for different distance intervals.
- the object type can indicate, for example, whether the object 6, 11 is a wall, another vehicle such as another car Cyclists or something similar.
- Other distinguishable object types can also be curbs, crash barriers, fences or sections of buildings, for example roof or support beams of a garage, or structures such as bridges or similar.
- the object information can specify an object class assigned to a different object height for each of the objects.
- Object information through the computing device 4 can include that Object height and/or the object type are determined as a function of the distance errors associated with the individual echoes 7 and/or that the object information, in particular the object height and/or the object type, is also determined as a function of the echoes 7 associated with the object 6, 11 from a set of one or several objects 6, 11 assigned echoes 7 or measuring points is determined.
- the amplitudes of the received echoes 7 can be normalized for determining the amplitude curve depending on directional information assigned to the object 6, 11.
- the directional information can include the azimuth angle assigned to the respective echo 7, so that a different radiation characteristic of the distance sensor 3 in the azimuth direction, i.e. with respect to a plane parallel to the road surface 12, can be taken into account.
- the amplitudes of the echoes 7 can also be normalized over the distance, so that properties of the echoes 7, for example the variance in the distance and / or the direction, which can vary with the distance, for objects 6, 11 in different Distances can be evaluated analogously to each other.
- the object information is determined by the computing device 4 depending on a directional variance in the azimuth direction assigned to the echoes 7 and / or depending on the occurrence of at least one further echo 7, the further echo 7 being based on a due to its transit time Echo 7 assigned to a distance has an integer multiple of this transit time.
- the computing device 4 can use an assignment rule to determine the object information from the amplitude change rate, which is stored, for example, in a storage device of the computing device.
- an assignment rule determined by machine classification can be used, with the classifier being, for example, a decision tree, a neural network, a naive one Bayes classifier, a support vector machine (SVM) or similar can be used.
- SVM support vector machine
- the computing device 4 can in particular be set up to control at least one actuator (not shown) of the vehicle 1 depending on the height information.
- the at least one actuator can be, for example, a transverse guidance actuator and/or a longitudinal guidance actuator.
- the at least one actuator can be activated, for example, as part of a partially automated or automated driving maneuver, such as parking or exiting a parking space.
- the height information can also be displayed to a user of the vehicle 1 on a display device (not shown), for example a display, in particular as part of an environment map that at least partially represents the environment of the vehicle 1.
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022206021.0A DE102022206021A1 (de) | 2022-06-14 | 2022-06-14 | Verfahren zum Ermitteln einer eine Objekthöhe beschreibenden Objektinformation |
| PCT/DE2023/200105 WO2023241762A1 (de) | 2022-06-14 | 2023-05-23 | Verfahren zum ermitteln einer eine objekthöhe beschreibenden objektinformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4540623A1 true EP4540623A1 (de) | 2025-04-23 |
Family
ID=86688708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23728266.0A Pending EP4540623A1 (de) | 2022-06-14 | 2023-05-23 | Verfahren zum ermitteln einer eine objekthöhe beschreibenden objektinformation |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4540623A1 (de) |
| DE (1) | DE102022206021A1 (de) |
| WO (1) | WO2023241762A1 (de) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19801617A1 (de) * | 1998-01-17 | 1999-07-22 | Daimler Chrysler Ag | Radarsignal-Verarbeitungsverfahren |
| US6404328B1 (en) | 2000-10-24 | 2002-06-11 | Delphi Technologies, Inc. | Discrimination of detected objects in a vehicle path |
| DE102004047479A1 (de) | 2004-09-30 | 2006-04-13 | Robert Bosch Gmbh | Verfahren und Vorrichtung zum Klassifizieren von Seitenbegrenzungen einer Parklücke für ein Einparkassistenzsystem |
| JP6170704B2 (ja) * | 2013-03-29 | 2017-07-26 | 富士通テン株式会社 | レーダ装置、および、信号処理方法 |
| DE102020212381A1 (de) | 2020-09-30 | 2022-03-31 | Continental Automotive Gmbh | Verfahren zur Charakterisierung eines Objekts in einer Umgebung eines Kraftfahrzeugs |
-
2022
- 2022-06-14 DE DE102022206021.0A patent/DE102022206021A1/de active Pending
-
2023
- 2023-05-23 WO PCT/DE2023/200105 patent/WO2023241762A1/de not_active Ceased
- 2023-05-23 EP EP23728266.0A patent/EP4540623A1/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102022206021A1 (de) | 2023-12-14 |
| WO2023241762A1 (de) | 2023-12-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102008029613B4 (de) | Verfahren zur Schätzung der Elevation eines Zielobjekts unter Verwendung einer Radar-Datenfusion | |
| DE112013004908B4 (de) | Objekterfassungsvorrichtung | |
| DE102019119204B4 (de) | Assistenzsteuerungssystem | |
| EP1660912B1 (de) | Verfahren und vorrichtung zur bestimmung von grösse und position einer parklücke | |
| EP3465264B1 (de) | Verfahren zur erkennung wenigstens einer parklücke für ein fahrzeug | |
| DE19832790A1 (de) | Hindernis-Erkennungssystem für Kraftfahrzeuge | |
| DE102008062708A1 (de) | Verfahren zur Bestimmung der Fahrbahnebene einer Parklücke | |
| DE102007035219A1 (de) | Objektklassifizierungsverfahren und Einparkhilfesystem | |
| EP2698646A1 (de) | Verfahren zur Klassifizierung von fahrenden Fahrzeugen durch Verfolgung einer Positionsgröße des Fahrzeuges | |
| EP1764630A1 (de) | Verfahren zur Parklückenbestimmung für Kraftfahrzeuge | |
| DE102010027647A1 (de) | Laserbasiertes Verfahren zur Reibwertklassifikation in Kraftfahrzeugen | |
| EP2191293A1 (de) | Objektklassifizierungsverfahren, einparkhilfeverfahren und einparkhilfesystem | |
| DE102014202497B4 (de) | Schätzung geometrischer Parameter eines fahrbahnfesten seitlichen Objekts | |
| DE102016014060A1 (de) | Verfahren zur radarbasierten Bestimmung einer Höhe eines Objekts | |
| DE102019205565A1 (de) | Verfahren und Vorrichtung zum Bewerten einer Objekthöhe mittels von einem an einem Fahrzeug angebrachten Ultraschallsensor empfangenen Ultraschallsignalen | |
| EP2887093A1 (de) | Verfahren zum Klassifizieren eines Objekts, Sensoreinrichtung und Kraftfahrzeug | |
| EP4222527B1 (de) | Verfahren zur charakterisierung eines objekts in einer umgebung eines kraftfahrzeugs | |
| EP3515787B1 (de) | Verfahren zur positionsbestimmung eines schienenfahrzeugs und schienenfahrzeug mit positionsbestimmungseinrichtung | |
| WO2017080787A1 (de) | Seitliche leitplankenerkennung über einen abstandssensor im kfz | |
| DE102008054579B4 (de) | Dejustageerkennung für einen Radarsensor | |
| DE102018103551B4 (de) | Verfahren zum Charakterisieren eines Objekts in einem Umgebungsbereich eines Kraftfahrzeugs anhand von zuvor gelernten Kurvenparametern, Sensorvorrichtung sowie Fahrerassistenzsystem | |
| EP1308751A2 (de) | Verfahren zum Betreiben eines Nahbereichserkennungssystems und Nahbereichserkennungssystem | |
| EP3252502A1 (de) | Verfahren zum erkennen einer neigung in einer fahrbahn eines kraftfahrzeugs, fahrerassistenzsystem sowie kraftfahrzeug | |
| DE102007058241B4 (de) | Auswerteverfahren, insbesondere für ein Fahrerassistenzsystem eines Kraftfahrzeugs, zur Objektdetektion mittels eines Radarsensors | |
| DE102021212901B4 (de) | Verfahren zur Charakterisierung eines Objekts in einer Umgebung eines Kraftfahrzeugs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
| 17P | Request for examination filed |
Effective date: 20250114 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: AUMOVIO AUTONOMOUS MOBILITY GERMANY GMBH |
|
| DAV | Request for validation of the european patent (deleted) | ||
| DAX | Request for extension of the european patent (deleted) |