WO2016084645A1 - 車両の走行制御装置及び走行制御方法 - Google Patents
車両の走行制御装置及び走行制御方法 Download PDFInfo
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- WO2016084645A1 WO2016084645A1 PCT/JP2015/082150 JP2015082150W WO2016084645A1 WO 2016084645 A1 WO2016084645 A1 WO 2016084645A1 JP 2015082150 W JP2015082150 W JP 2015082150W WO 2016084645 A1 WO2016084645 A1 WO 2016084645A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
- B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
- B60W40/06—Road conditions
- B60W40/072—Curvature of the road
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- B60W30/165—Automatically following the path of a preceding lead vehicle, e.g. "electronic tow-bar"
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- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0231—Control of position or course in two dimensions specially adapted to land vehicles using optical position detecting means
- G05D1/0246—Control of position or course in two dimensions specially adapted to land vehicles using optical position detecting means using a video camera in combination with image processing means
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- G05D1/021—Control of position or course in two dimensions specially adapted to land vehicles
- G05D1/0257—Control of position or course in two dimensions specially adapted to land vehicles using a radar
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- G08G1/16—Anti-collision systems
- G08G1/167—Driving aids for lane monitoring, lane changing, e.g. blind spot detection
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- B60K35/28—Output arrangements, i.e. from vehicle to user, associated with vehicle functions or specially adapted therefor characterised by the type of the output information, e.g. video entertainment or vehicle dynamics information; characterised by the purpose of the output information, e.g. for attracting the attention of the driver
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- B60K35/00—Instruments specially adapted for vehicles; Arrangement of instruments in or on vehicles
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Definitions
- the present disclosure relates to travel control of a vehicle, and more particularly to travel control technology for controlling travel of the host vehicle based on the predicted course of the host vehicle.
- tracking control in which the host vehicle travels following the preceding vehicle traveling on the same lane as the host vehicle among the preceding vehicles traveling in front of the host vehicle is known. ing.
- follow-up control for example, it is important to accurately identify a vehicle traveling on the same lane as the own vehicle from among preceding vehicles detected by a sensor, a camera, or the like. Therefore, conventionally, a future travel route of the host vehicle is obtained by calculation, and a preceding vehicle existing on the future travel route is set as a target for follow-up control.
- Various methods for calculating the future travel route of the host vehicle have been proposed (see, for example, Patent Document 1).
- Patent Document 1 discloses that a travel locus of a preceding vehicle traveling ahead of the host vehicle is stored, and a future travel route of the host vehicle is calculated using the stored travel track.
- Patent Document 1 it is not assumed that the preceding vehicle has deviated from the lane, such as when the lane is changed unexpectedly. If such a situation occurs, the calculation accuracy of the course prediction of the host vehicle is not assumed. May decrease. Further, since the movement trajectory of the preceding vehicle can be obtained only in the inter-vehicle section from the own vehicle to the preceding vehicle, there is a concern that the prediction of the future traveling route is in a limited range.
- This disclosure has an object to provide a vehicle travel control technology capable of improving the prediction accuracy of the travel route of the host vehicle.
- This disclosure employs the following means.
- the present disclosure relates to a travel control device for a vehicle that controls travel of the host vehicle based on a predicted course that is a future travel path of the host vehicle.
- the travel control device includes an object detection unit that detects a position of a stationary object provided along a road on or on a road on which the host vehicle travels, and a preceding vehicle that travels in front of the host vehicle.
- the position storage means for storing the preceding vehicle position that is the position of the vehicle in time series, the other vehicle movement locus that is the locus of the preceding vehicle position stored in the position storage means, and the position of the stationary object detected by the object detection means
- the trajectory determination means for determining whether or not the other vehicle movement trajectory is along the shape of the road, and the trajectory determination means determines that the other vehicle movement trajectory is along the shape of the road.
- a course calculation means that validates the other vehicle movement locus and invalidates the other vehicle movement locus when it is determined that the other vehicle movement locus is not along the road shape, and calculates a predicted course based on the validated other vehicle movement locus; Prepare.
- the movement trajectory of the preceding vehicle is compared with the movement trajectory of the preceding vehicle by comparing the position of a stationary object such as a lane marking on the traveling road or a guardrail on the side of the road with the movement trajectory of the preceding vehicle. It was set as the structure which determines whether it was along the shape. Further, when it is determined that the movement locus of the preceding vehicle is along the shape of the road, the movement locus of the preceding vehicle is validated.
- the traveling control device of the present disclosure when it is determined that the moving track of the preceding vehicle does not follow the shape of the road, the moving track of the preceding vehicle is invalidated.
- the predicted course of the host vehicle is calculated based on the valid movement trajectory of the preceding vehicle.
- the travel control device is a travel control device for a vehicle that controls the travel of the host vehicle based on a predicted track that is a future travel route of the host vehicle, and is a preceding vehicle that travels in front of the host vehicle.
- Position storage means for storing a certain preceding vehicle position in time series, radius estimation means for estimating the curve radius of the traveling road of the own vehicle, and an inter-vehicle section from the own vehicle to the preceding vehicle are stored in the position storage means.
- the predicted course is calculated based on the other vehicle movement locus which is the locus of the preceding vehicle position, and the predicted course calculated based on the other vehicle movement locus is set to the curve radius estimated by the radius estimation means for the section farther than the inter-vehicle section.
- a route calculation means for calculating a predicted route by extending based on the route.
- the movement trajectory of the preceding vehicle can be obtained only in the inter-vehicle section from the host vehicle to the preceding vehicle, and the course determined based on the moving trajectory is limited to the inter-vehicle section.
- the controllability of the travel control is reduced by limiting the target vehicle for the travel control based on the course prediction.
- the predicted course is extended by using the estimated curve radius, so it is possible to predict a travel course farther from the host vehicle, and to other vehicles located far away.
- the course of the host vehicle can be predicted.
- the object vehicles of traveling control based on course prediction can be expanded, and it is suitable when carrying out traveling control based on course prediction.
- FIG. 1 is a block diagram showing a schematic configuration of a vehicle travel control device.
- FIG. 2 is a diagram showing a movement locus of a preceding vehicle when traveling on a curved road.
- FIG. 3 is an explanatory diagram when the lane marking and the guard rail are stationary objects.
- FIG. 4 is a diagram for explaining the procedure for calculating the movement trajectory.
- FIG. 5 is an explanatory diagram for explaining the process of extending the predicted course using the estimated R.
- FIG. 6 is a flowchart illustrating the processing procedure of the predicted course calculation process.
- FIG. 7 is a flowchart illustrating a processing procedure of a predicted course calculation process based on the movement trajectory.
- the travel control device is mounted on a vehicle, and performs follow-up control that travels following a preceding vehicle that travels on the same lane as the own vehicle among preceding vehicles traveling in front of the host vehicle. To do.
- follow-up control the inter-vehicle distance between the host vehicle and the preceding vehicle is controlled.
- a travel control device 10 is a computer having a CPU, ROM, RAM, I / O, and the like.
- the travel control apparatus 10 includes a course prediction unit 20, a follow-up vehicle setting unit 35, and a control target value calculation unit 36.
- the CPU executes each of these functions by executing a program installed in the ROM. Is realized.
- the vehicle (own vehicle) is equipped with object detection means for detecting an object existing around the vehicle.
- the travel control device 10 receives object detection information from the object detection means, and executes tracking control for the preceding vehicle based on the input information.
- an imaging device 11 and a radar device 12 are provided in the vehicle.
- the imaging device 11 is an in-vehicle camera, and is composed of a CCD camera, a CMOS image sensor, a near infrared camera, and the like.
- the imaging device 11 captures the surrounding environment including the traveling road of the host vehicle, generates image data representing the captured image, and sequentially outputs the image data to the traveling control device 10.
- the imaging device 11 is installed, for example, in the vicinity of the upper end of the windshield of the host vehicle, and captures an area that extends in the range of the predetermined angle ⁇ 1 toward the front of the vehicle with the imaging axis as the center.
- the imaging device 11 may be a monocular camera or a stereo camera.
- the radar device 12 is a detection device that detects an object by transmitting an electromagnetic wave as a transmission wave and receiving the reflected wave, and is configured by a millimeter wave radar in this embodiment.
- the radar device 12 is attached to the front part of the host vehicle, and scans a region that extends over a range of a predetermined angle ⁇ 2 ( ⁇ 2 ⁇ 1) with the optical axis as a center toward the front of the vehicle using a radar signal. Then, the radar device 12 creates distance measurement data based on the time from transmission of electromagnetic waves toward the front of the vehicle until reception of the reflected wave, and sequentially outputs the created distance measurement data to the travel control device 10. To do.
- the distance measurement data includes information on the direction in which the object exists, the distance to the object, and the relative speed.
- the imaging device 11 and the radar device 12 each have the same imaging axis as the reference axis of the imaging device 11 and the optical axis as the reference axis of the radar device 12 in the direction parallel to the traveling road surface of the host vehicle. It is attached so that it is in the direction. At least a part of the detectable area of the imaging device 11 and the detectable area of the radar device 12 overlap each other.
- the radar device 12 corresponds to “first detection means”
- the imaging device 11 corresponds to “second detection means”.
- the travel control device 10 receives image data from the imaging device 11 and distance measurement data from the radar device 12, and also receives detection signals from various sensors provided in the vehicle.
- a yaw rate sensor 13 for detecting an angular velocity (hereinafter referred to as “yaw rate”) in a turning direction of the vehicle
- a vehicle speed sensor 14 for detecting a vehicle speed, and the like
- a steering angle sensor 15 that detects the steering angle
- an ACC switch 16 that is operated when the driver selects the follow-up control mode, and the like are provided.
- the course prediction unit 20 is a calculation unit that predicts the traveling route of the host vehicle, and includes a first predicted route calculation unit 21 and a second predicted route calculation unit 22.
- the 1st prediction course calculating part 21 calculates the future driving course of the own vehicle based on the movement locus
- the second predicted course calculation unit 22 calculates the future travel course of the host vehicle based on the yaw rate of the host vehicle.
- the first predicted course calculation unit 21 receives the stationary object information from the stationary object information acquisition unit 23, the white line information from the white line information acquisition unit 24, and the other vehicle movement locus information from the other vehicle movement locus acquisition unit 25, respectively.
- the first predicted course calculation unit 21 calculates a first predicted course that is a future travel course of the host vehicle by combining the input information.
- the first predicted course calculation unit 21 can predict the course of the host vehicle independent of the yaw rate of the host vehicle.
- the stationary object information acquisition unit 23 is based on the distance measurement data from the radar device 12 and is positional information regarding roadside stationary objects (for example, three-dimensional obstacles such as guardrails and walls) existing along the road on the traveling road of the host vehicle. And the position information is output to the first predicted course calculation unit 21 as stationary object information.
- the white line information acquisition unit 24 calculates information on road lane markings (white lines) included in the image captured by the imaging device 11 based on the image data from the imaging device 11, and uses the calculated information as white line information. Is output to the first predicted course calculation unit 21.
- the white line information acquisition unit 24 extracts edge points as white line candidates from image data based on, for example, a luminance change rate in the horizontal direction of the image. Then, the white line information acquisition unit 24 sequentially stores the extracted edge points for each frame, and calculates the white line information based on the stored white line edge point history.
- the other vehicle movement trajectory acquisition unit 25 represents the position of the preceding vehicle (the passing point of the preceding vehicle) based on the distance measurement data from the radar device 12 (distance information between the own vehicle and the preceding vehicle and lateral position information).
- the preceding vehicle position which is a coordinate
- the other vehicle movement locus acquisition unit 25 calculates the movement locus of the preceding vehicle based on the stored time-series data of the preceding vehicle position, and uses the calculated movement locus as the other vehicle movement locus information to the first predicted route calculation unit 21. Output.
- the other vehicle movement trajectory acquisition unit 25 functions as a position storage unit.
- the other-vehicle movement trajectory acquisition unit 25 calculates a movement trajectory of not only a vehicle traveling on the same lane as the own vehicle but also a vehicle traveling on a lane adjacent to the own vehicle among the preceding vehicles. This is used to predict the course of the vehicle.
- the second predicted course calculation unit 22 receives an estimated curve radius (hereinafter referred to as “estimated R”) of the traveling road of the host vehicle from the curve radius estimation unit 26, and uses the input estimated R to A second predicted course that is a future travel course is calculated.
- the curve radius estimation unit 26 calculates an estimated R from the yaw rate (yaw angle) detected by the yaw rate sensor 13 and the vehicle speed detected by the vehicle speed sensor 14.
- the method of calculating the estimated R is not limited to this.
- the estimated R may be calculated using image data, or may be calculated from the steering angle detected by the steering angle sensor 15 and the vehicle speed detected by the vehicle speed sensor 14. Good.
- the curve radius estimation unit 26 functions as a radius estimation unit.
- the following vehicle setting unit 35 uses the predicted route calculated by the route prediction unit 20 and sets the preceding vehicle existing on the predicted route among the preceding vehicles traveling in front of the host vehicle as the following vehicle.
- the control target value calculation unit 36 calculates a control target value for maintaining the inter-vehicle distance between the following vehicle set by the following vehicle setting unit 35 and the own vehicle by controlling the traveling speed of the own vehicle. .
- the control target value calculation unit 36 calculates a control target value for maintaining the inter-vehicle distance at a preset target interval. Specifically, control values such as a target output and a required brake force of the vehicle-mounted engine are calculated, and these control values are output as control signals to the engine electronic control unit (engine ECU 41).
- the travel control device 10 is configured to output a control signal to the engine ECU 41 and to output a control signal from the engine ECU 41 to the brake electronic control unit (brake ECU 42).
- the traveling control apparatus 10 outputs a control signal to each of engine ECU41 and brake ECU42.
- the course prediction result calculated by the first predicted course calculation unit 21, that is, the course prediction result based on the movement trajectory of the preceding vehicle is validated, and the following vehicle is selected using this. .
- the reason is as follows. While traveling on a straight road, the prediction accuracy hardly changes between the first predicted route that is the route prediction result based on the movement trajectory of the preceding vehicle and the second predicted route that is the route prediction result based on the estimated R.
- the following vehicle is selected using the second predicted course, it is on the same lane as the own vehicle.
- the preceding vehicle existing in the adjacent lane, not the preceding vehicle may be selected as the following vehicle. Therefore, in the present embodiment, basically, the following vehicle is selected using the first predicted route with priority.
- the travel control device 10 when the course of the host vehicle is predicted using the movement trajectory of the preceding vehicle, the data when the preceding vehicle moves along the shape of the road, such as when the preceding vehicle unexpectedly changes lanes, is used. If used, there is a concern that the calculation accuracy of the course prediction of the host vehicle is lowered.
- a stationary object such as a lane marking on a traveling road or a roadside stationary object (for example, a three-dimensional obstacle such as a guardrail or a wall) provided along the road. Using the detection result of the object, the position of the stationary object is compared with the movement locus of the preceding vehicle.
- the movement locus of the preceding vehicle is validated.
- the moving track of the preceding vehicle does not follow the shape of the road, the moving track of the preceding vehicle is invalidated. Then, the first predicted course is calculated on the basis of the valid movement track of the preceding vehicle.
- the structure which erases the movement locus calculated using the preceding vehicle position the structure which prohibits use of the movement locus calculated using the preceding vehicle position, etc. are included. .
- FIG. 2 is a diagram illustrating a movement locus RT of the preceding vehicle M2 when the host vehicle M1 and the preceding vehicle M2 travel on a curved road.
- the radar apparatus 12 detects a plurality of preceding vehicle positions Pd as a result of detecting the preceding vehicle M2 by the radar apparatus 12 and a three-dimensional obstacle (for example, a guard rail provided on the side of the road) as a roadside stationary object.
- a plurality of stationary object detection points Pa that are the results of the above are shown.
- the preceding vehicle position Pd is obtained by averaging a plurality of vehicle detection points, which are the results detected by the radar device 12, at predetermined distance intervals (for example, 10 m intervals).
- FIG. 2A shows a case where the movement trajectory RT of the preceding vehicle M2 matches (follows) the shape of the road
- FIG. 2B shows that the movement trajectory RT does not match the shape of the road.
- FIG. 2A shows a situation in which the preceding vehicle M2 does not change lanes and continuously travels in the same lane as the own vehicle M1, and is calculated from time-series data of the preceding vehicle position Pd.
- the movement trajectory RT is along the shape of the road.
- the movement trajectory RT each preceding vehicle position Pd
- the lateral direction with respect to the traveling direction of the own vehicle M1 It can be seen that the relative position of is substantially constant.
- the movement trajectory RT of the preceding vehicle M2 is recognized as being effective as a movement trajectory used for predicting the course of the host vehicle M1 along the shape of the running road.
- FIG. 2B shows a situation in which the preceding vehicle M2 is changing to the right lane, and the movement locus RT calculated from the time-series data of the preceding vehicle position Pd is the road Not in line with the shape.
- the movement trajectory RT each preceding vehicle position Pd
- the lateral direction with respect to the traveling direction of the own vehicle M1 It can be seen that the relative position of is not constant.
- the movement trajectory RT of the preceding vehicle M2 does not follow the shape of the road on which the vehicle is traveling and is recognized as invalid as the movement trajectory used for the course prediction of the host vehicle M1.
- the position of the stationary object that is present in the left direction with respect to the traveling direction of the host vehicle M1 is compared with the movement trajectory RT of the preceding vehicle M2, but in the traveling direction of the host vehicle M1.
- a stationary object that exists in the right direction is also included in the comparison object.
- FIG. 3 is an explanatory diagram in the case where the lane marking (white line) and the guard rail are set as stationary objects and their positions are calculated in the host vehicle M1.
- FIG. 3 shows a plurality of stationary object detection points Pa detected as roadside guardrails and lane markings (white lines) Pb that divide the lane on the road.
- FIG. 3A shows a shelter J (a place where a vehicle is withdrawn from the road) provided on a part of the roadside of the straight road.
- FIG. 3B shows a guard fence for construction provided on the side of the road. In such a case, the arrangement of the stationary object detection points Pa and the shape of the lane markings Pb do not match.
- the movement trajectory RT of the preceding vehicle M2 is effective as a movement trajectory used for the course prediction of the host vehicle M1 based on the fact that the horizontal relative position between the movement trajectory RT and the lane marking Pb is constant. Certified.
- the preceding vehicle M2 travels consciously of the guard fence instead of the lane marking Pb.
- the movement trajectory RT each preceding vehicle position Pd
- the lateral direction relative to the traveling direction of the host vehicle M1 It can be seen that the relative position is constant.
- comparing the movement trajectory RT of the preceding vehicle M2 with the lane marking Pb it can be seen that the lateral relative position with respect to the traveling direction of the host vehicle M1 is not constant.
- the movement trajectory RT of the preceding vehicle M2 is effective as a movement trajectory used for the course prediction of the host vehicle M1 based on the fact that the lateral relative position between the movement trajectory RT and the stationary object detection point Pa is constant. Is certified.
- a plurality of sections K (K1 to K5 in FIG. 4) are set in front of the host vehicle M1, for example, at an interval of 10 m, and the preceding vehicle position Pd (Pd1 in FIG. 4) is set for each section. To Pd5). Further, three or more sections are set as one unit section KN, and a straight course ⁇ ( ⁇ 1 to ⁇ 3 in FIG. 4) is calculated based on the preceding vehicle position Pd for each unit section KN. At this time, in the present embodiment, the unit section KN is set so as to partially overlap in the inter-vehicle section from the host vehicle M1 to the preceding vehicle M2. And the movement locus
- the straight path ⁇ 1 is calculated with the sections K1 to K3 as one unit section KN (1-3).
- the straight path ⁇ 2 is calculated with the sections K2 to K4 as one unit section KN (2-4).
- the straight path ⁇ 3 is calculated with the sections K3 to K5 as one unit section KN (3-5).
- the preceding vehicle positions Pd1 and Pd3 corresponding to the sections K1 and K3 located on both sides of the middle section K2 are determined.
- a straight path ⁇ 1 is calculated by connecting with a straight line. The same applies to other unit sections.
- the method of calculating the straight path ⁇ of the unit section KN is not limited to the above-described method of connecting the preceding vehicle positions Pd (two preceding vehicle positions) of the sections K located on both sides of the unit section KN with a straight line.
- the unit section KN may include four or more sections K.
- the calculated straight courses ⁇ 1 to ⁇ 3 are appropriately slid in the lateral direction to connect the straight courses ⁇ 1 to ⁇ 3.
- the starting point (end point on the own vehicle M1 side) of the straight path ⁇ 1 is set as the front position of the own vehicle M1.
- the start point of the straight path ⁇ 2 is set as the preceding vehicle position Pd2 on the straight path ⁇ 1
- the start point of the straight path ⁇ 3 is set as the preceding vehicle position Pd4 on the straight path ⁇ 2.
- the preceding vehicle positions Pd1, Pd2, Pd4, and Pd5 are connected by a straight line, and the respective straight paths ⁇ 1 to ⁇ 3 are connected (synthesized).
- the noise is eliminated and the following vehicle It is possible to calculate a movement trajectory RT for specifying
- the final movement trajectory RT may be calculated by calculating the movement trajectory RT for each preceding vehicle M2 by the above method and connecting the calculated movement trajectories RT together.
- the connection of the movement trajectory RT is far from the own vehicle M1 (back side) with respect to the movement trajectory RT of the preceding vehicle M2 that is close to the own vehicle M1 (near side) of the two preceding vehicles M2.
- the movement trajectory RT of the preceding vehicle M2 may be slid in the horizontal direction. In this case, the length of the movement trajectory RT can be extended rather than calculating the movement trajectory RT based on the preceding vehicle position Pd of one preceding vehicle M2.
- the discontinuity between the two movement trajectories RT is estimated from estimated R, which is an estimated curve radius of the road estimated from the turning information (yaw rate or steering angle) of the host vehicle M1 and the vehicle speed, or image data. Interpolation may be performed based on the estimated R.
- the history of the position of the preceding vehicle M2 (time series data of the preceding vehicle position Pd) can be obtained only in the inter-vehicle section from the own vehicle M1 to the preceding vehicle M2. Therefore, the predicted course of the host vehicle M1 that can be calculated based on the movement locus RT of the preceding vehicle M2 is limited to the inter-vehicle section. Therefore, in the present embodiment, for the inter-vehicle section from the own vehicle M1 to the preceding vehicle M2, as described above, the first predicted course is calculated based on the movement locus RT of the preceding vehicle M2.
- the first predicted course calculated based on the movement trajectory RT of the preceding vehicle M2 is extended by the second predicted course calculated based on the estimated R that is the estimated curve radius of the road.
- the predicted course of the host vehicle M1 is calculated.
- the traveling route of the own vehicle M1 can be predicted further.
- FIG. 5 illustrates a process of extending the predicted course of the host vehicle M1 using the first predicted course based on the movement trajectory RT of the preceding vehicle M2 and the second predicted course based on the estimated curve radius R of the road. It is explanatory drawing to do.
- the first predicted course RA based on the movement trajectory RT of the preceding vehicle M2 is indicated by a broken line
- the second predicted course RB based on the estimated R is indicated by a two-dot chain line
- the host vehicle M1 is synthesized and extended.
- the predicted course RC is indicated by a solid line.
- the area S1 close to the host vehicle M1 in the front area of the host vehicle M1 is an area where the history of the position of the preceding vehicle M2 (time series data of the preceding vehicle position Pd) is obtained (exists).
- the region S2 farther from the host vehicle M1 than the region S1 is a region where the history of the position of the preceding vehicle M2 cannot be obtained (does not exist).
- the movement locus RT of the preceding vehicle M2 is calculated from the time series data of the preceding vehicle position Pd for the inter-vehicle section (region S1) from the host vehicle M1 to the preceding vehicle M2.
- the first predicted course RA is calculated based on the calculated movement locus RT.
- the second predicted course RB is calculated based on the estimated R.
- the second predicted route RB calculated based on the estimated R is connected with the position PE on the first predicted route RA corresponding to the terminal position of the movement locus RT of the preceding vehicle M2 as a starting point. Thereby, the predicted course is extended, and the predicted course RC of the extended own vehicle M1 is calculated.
- the travel control device 10 acquires time-series data of the preceding vehicle position Pd (the history of the position of the preceding vehicle M2) in step S101. In addition, when there are a plurality of preceding vehicles M2, the following determination process of step S103 and step S104 is performed on the movement trajectory RT for each vehicle.
- the travel control device 10 acquires the position of the stationary object (stationary object detection point Pa) in subsequent step S102.
- three-dimensional obstacles for example, guardrails, median strips, guard fences, etc.
- the position information of the three-dimensional obstacle is acquired from the distance measurement data from the radar device 12, and the position information of the lane marking Pb is acquired from the image data from the imaging device 11.
- step S103 the travel control device 10 compares the movement trajectory RT of the preceding vehicle M2 calculated based on the time-series data of the preceding vehicle position Pd with the position of the three-dimensional obstacle, and the movement trajectory RT becomes the three-dimensional obstacle. It is determined whether the object is along the object (whether it is along the shape of the road).
- the preceding vehicle position Pd and the stationary object detection point are compared by comparing the plurality of preceding vehicle positions Pd acquired in step S101 with the plurality of stationary object detection points Pa of the three-dimensional obstacle acquired in step S102. It is determined whether the positional relationship with Pa coincides with the relative position in the lateral direction with respect to the traveling direction of the host vehicle M1.
- the traveling control device 10 extracts a combination of the preceding vehicle position Pd and the stationary object detection point Pa, where the position of the host vehicle M1 is the same in the traveling direction, and extracts the preceding vehicle position Pd and the stationary object detection point.
- the distance in the horizontal direction with Pa is calculated at a plurality of points. And when the difference of the distance in contrast of several points is below a predetermined value, it determines with the horizontal relative position with respect to the advancing direction of the own vehicle M1 agree
- the course prediction unit 20 functions as a trajectory determination unit.
- the method for determining whether or not the movement locus RT of the preceding vehicle M2 is along a three-dimensional obstacle is not limited to the above method.
- the determination may be made based on the distance between an arbitrary point on the movement locus RT where the position of the traveling direction of the host vehicle M1 is the same and an arbitrary point on a line connecting the stationary object detection point Pa.
- step S104 the traveling control device 10 compares the movement locus RT calculated based on the time-series data of the preceding vehicle position Pd with the lane marking Pb, and determines whether or not the movement locus RT is along the lane marking Pb. (Whether or not it follows the shape of the road). In this step S104, it is determined whether or not the positional relationship between the movement trajectory RT and the lane marking Pb is the same in the lateral relative position with respect to the traveling direction of the host vehicle M1. More specifically, the traveling control apparatus 10 extracts a plurality of lateral relative positions of the movement locus RT and the lane marking Pb with respect to the traveling direction of the host vehicle M1. And when the difference of the relative position in contrast of several points is below a predetermined value, it determines with the horizontal relative position with respect to the advancing direction of the own vehicle M1 agree
- the movement trajectory RT of the preceding vehicle M2 used for the comparison processing in step S103 and step S104 a plurality of preceding vehicle positions Pd are connected by a straight line in order to easily determine whether the movement trajectory RT is valid / invalid. Use the trajectory.
- the determination process of whether the movement trajectory RT is valid / invalid the movement trajectory RT of the preceding vehicle M2 obtained by the calculation method described with reference to FIG. 4 may be used.
- step S103 traveling control apparatus 10 determines that movement trajectory RT of preceding vehicle M2 is along the three-dimensional obstacle (along the shape of the road) (if S103 is YES). The process proceeds to step S105.
- step S104 when it is determined in step S104 that the movement trajectory RT of the preceding vehicle is along the lane marking Pb (along the shape of the road) (if S104 is YES), The process proceeds to step S105.
- step S105 travel control apparatus 10 recognizes (determines) that movement trajectory RT of preceding vehicle M2 is valid.
- step S106 the traveling control device 10 calculates a predicted course (first predicted course RA) based on the movement trajectory RT that has been validated.
- the course prediction unit 20 functions as a course calculation unit.
- step S103 when it is determined in step S103 that the movement trajectory RT of the preceding vehicle M2 does not follow the three-dimensional obstacle (not along the shape of the road) (when S103 is NO), The process proceeds to step S104. If it is determined in step S104 that the movement trajectory RT of the preceding vehicle is not along the lane marking Pb (not along the shape of the road) in step S104 (step S107 is NO), the travel control device 10 performs step S107. Proceed to the process. In step S107, traveling control apparatus 10 recognizes (determines) that movement trajectory RT for preceding vehicle M2 is invalid. When there is no effective movement locus RT, a predicted route (second predicted route RB) is calculated based on the estimated R, and the following vehicle is specified using this predicted route.
- second predicted route RB is calculated based on the estimated R, and the following vehicle is specified using this predicted route.
- the travel control device 10 calculates a straight path ⁇ for each unit section KN based on the time-series data of the preceding vehicle position Pd in step S201.
- the movement trajectory RT is calculated by synthesizing each straight path ⁇ of the unit section KN (joining each straight path ⁇ ), and in step S203, the predicted course of the inter-vehicle section is calculated using the movement trajectory RT. (First predicted course RA) is calculated.
- the plurality of movement trajectories RT that are recognized as valid are synthesized. To do.
- the predicted trajectory of the inter-vehicle section (the first predicted trajectory RA) is obtained by performing a weighted average on the movement trajectory RT of the preceding vehicle M2 using white line information. ) Is calculated.
- the predicted trajectory of the inter-vehicle section (first predicted trajectory RA) is obtained by performing weighted averaging on the moving trajectory RT obtained by combining them with the white line information. Is calculated.
- step S204 the travel control device 10 extends the predicted course of the host vehicle M1 to a section (area S2) farther than the inter-vehicle section (area S1) based on the estimated R. More specifically, the first predicted route RA calculated based on the movement trajectory RT is connected to the second predicted route RB calculated based on the estimated R, the predicted route is extended, and the predicted predicted route of the host vehicle M1 is extended. Calculate RC. Then, the traveling control device 10 ends this routine. In the present embodiment, the following vehicle is specified using the predicted course calculated in this routine.
- the position of a stationary object such as a lane marking Pb on the traveling road or a guard rail on the road is compared with the movement locus RT of the preceding vehicle M2.
- a stationary object detection point Pa such as a lane marking Pb on the traveling road or a guard rail on the road.
- it is configured to determine whether or not the movement locus RT is along the shape of the road. If it is determined that the movement trajectory RT follows the shape of the road, the movement trajectory RT of the preceding vehicle M2 is validated. On the other hand, when it is determined that the movement locus RT does not follow the shape of the road, the movement locus RT is invalidated. And it was set as the structure which calculates the estimated course of the own vehicle M1 based on the validated movement locus
- the traveling control apparatus 10 when the preceding vehicle M2 moves unexpectedly along the road, the movement locus RT of the preceding vehicle M2 is invalidated, and the predicted course of the own vehicle M1 is incorrect. Can be suppressed.
- the three-dimensional obstacle provided on the road or along the road and the lane marking Pb on the road are set as stationary objects, and the movement locus RT of the preceding vehicle M2 is In the case of being along at least one of the three-dimensional obstacle and the lane marking Pb, the movement trajectory RT is made valid.
- the three-dimensional obstacles on the road side various objects such as roadside trees and standing signs as well as guardrails are assumed, and it is considered that there are many objects that can be a disturbance in estimating the road shape. Therefore, when the three-dimensional obstacle is excluded from the comparison target with the movement locus RT of the preceding vehicle M2, only the comparison between the lane marking Pb and the movement locus RT is performed.
- the determination accuracy may be lowered due to the narrow range in which the lane marking Pb can be recognized.
- the travel control device 10 with the above-described configuration, it is possible to suppress a decrease in prediction accuracy due to inappropriate use of data and to secure an opportunity to perform a predicted course based on the movement trajectory RT. The balance can be maintained, and the travel control based on the course prediction can be performed.
- the movement trajectory RT of the preceding vehicle M2 can be obtained only in the inter-vehicle section from the own vehicle M1 to the preceding vehicle M2. Therefore, the predicted course of the host vehicle M1 that can be calculated based on the movement locus RT of the preceding vehicle M2 is limited to the inter-vehicle section. Therefore, the travel control apparatus 10 according to the present embodiment is configured to extend the predicted course of the host vehicle M1 using the estimated R that is the estimated curve radius of the road. As a result, the travel control apparatus 10 according to the present embodiment can predict a travel route farther from the host vehicle M1, and can predict the course of the host vehicle M1 to a preceding vehicle M2 located farther away. it can. As a result, it is possible to enlarge the target vehicle for travel control based on the route prediction, which is suitable for carrying out the travel control based on the route prediction.
- the straight path ⁇ is calculated for each unit section KN
- the movement trajectory RT of the preceding vehicle M2 is calculated by combining the straight path ⁇
- the calculated movement trajectory RT is used.
- the predicted course for the follow-up control (first predicted course RA) is calculated.
- the first predicted course calculation unit 21 is configured to receive stationary object information, white line information, and other vehicle movement trajectory information, and calculate the predicted course using the input information.
- the method of calculating the predicted course is not limited to this, and for example, a method that does not perform weighted averaging using white line information may be used.
- the three-dimensional obstacle extending along the road on the road or the side of the road and the lane marking Pb on the road are set as stationary objects, and the movement trajectory RT of the preceding vehicle M2 is defined by the three-dimensional obstacle and the lane marking Pb. If it is determined that the movement trajectory is at least along one of them, the movement trajectory RT is made valid. In addition, when it is determined that the object does not follow both the three-dimensional obstacle and the lane marking Pb, the movement locus RT is invalidated.
- the arrangement for determining whether the movement locus RT is valid / invalid is provided here. It is not limited.
- the movement locus RT is validated, and it is determined that the movement locus RT is not along the three-dimensional obstacle. In such a case, the movement trajectory RT may be invalidated. Moreover, it is good also as a structure which uses only the division line Pb for the comparison object with the movement locus
- the straight path ⁇ is calculated for each unit section KN, and the movement trajectory RT of the preceding vehicle M2 is calculated by synthesizing the straight path ⁇ .
- the configuration for calculating the movement trajectory RT is limited to this.
- the movement locus RT may be calculated by connecting a plurality of preceding vehicle positions Pd with straight lines, or the movement locus RT may be calculated by averaging a plurality of vehicle detection points included in the distance measurement data.
- the configuration is such that it is determined whether or not the movement trajectory RT follows the shape of the road by comparing the lane marking Pb actually recognized by the imaging device 11 and the movement trajectory RT of the preceding vehicle M2.
- the configuration for determining the movement locus RT is not limited to this.
- it may be configured to determine whether or not the movement trajectory RT follows the shape of the road by comparing the movement trajectory RT with a lane marking Pb actually recognized by the imaging device 11 and a long distance.
- the movement locus RT is invalidated based on the comparison result between the movement locus RT of the preceding vehicle M2 and the position of the stationary object, and is calculated based on the estimated R when there is no effective movement locus RT.
- the predicted course (second predicted course RB) is configured to be valid, the present invention is not limited to this.
- a configuration may be adopted in which course prediction is prohibited.
- whether or not the relative position between the movement trajectory RT of the preceding vehicle M2 and the stationary object detection point Pa is constant in the lateral direction with respect to the traveling direction of the host vehicle M1 is determined based on the positional deviation amount. Although it was set as the structure, it is not restricted to this. When it is determined whether or not the relative position in the lateral direction with respect to the traveling direction of the host vehicle M1 is constant, for example, the shape comparison between the lane marking Pb on the road and the movement locus RT is made, and the stationary object detection point Pa is connected. A configuration in which the line is compared with the movement locus RT may be used.
- the imaging device 11 and the radar device 12 are provided as the object detection means.
- the present invention is not limited to these.
- the invention is applied to a configuration including a sonar that detects an object using an ultrasonic wave as a transmission wave. Also good.
- the technology of the present disclosure may be applied to a vehicle that does not include the imaging device 11.
- the present invention is applied to follow-up control that travels following the preceding vehicle M2 that travels on the same lane as the host vehicle M1.
- the technology of the present disclosure may be applied to the course prediction of the host vehicle M1 for avoiding a collision between the host vehicle M1 and another vehicle.
- the technology of the present disclosure includes a program for causing a computer to execute each functional unit (each unit) constituting the travel control device 10, a medium on which the program is recorded, a vehicle travel control method, and the like. It can also be realized in various forms.
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Abstract
Description
本開示は上記実施形態に限定されず、例えば次のように実施してもよい。
Claims (5)
- 自車両の将来の走行進路である予測進路に基づいて前記自車両の走行を制御する車両の走行制御装置(10)であって、
前記自車両が走行する道路上又は該道路脇において前記道路に沿って設けられている静止対象物の位置を検出する物体検出手段(11,12)と、
前記自車両の前方を走行する先行車両の位置である先行車位置を時系列で記憶する位置記憶手段(25)と、
前記位置記憶手段に記憶されている前記先行車位置の軌跡である他車移動軌跡と、前記物体検出手段によって検出した前記静止対象物の位置とを比較して、前記他車移動軌跡が前記道路の形状に沿っているか否かを判定する軌跡判定手段(20)と、
前記軌跡判定手段により前記他車移動軌跡が前記道路の形状に沿っていると判定された場合に前記他車移動軌跡を有効とし、前記道路の形状に沿っていないと判定された場合に前記他車移動軌跡を無効とし、有効とした前記他車移動軌跡に基づいて前記予測進路を算出する進路算出手段(20)と、
を備える、車両の走行制御装置。 - 前記物体検出手段は、前記静止対象物として前記道路上又は該道路脇に前記道路に沿って設けられている立体障害物を検出する第1検出手段(12)と、前記静止対象物として前記道路上の区画線を検出する第2検出手段(11)と、を備え、
前記軌跡判定手段は、前記他車移動軌跡が、前記第1検出手段によって検出した前記立体障害物及び第2検出手段によって検出した前記区画線の少なくともいずれかに沿っているか否かを判定することにより、前記他車移動軌跡が前記道路の形状に沿っているか否かを判定し、
前記進路算出手段は、前記他車移動軌跡が、前記立体障害物及び前記区画線の少なくともいずれかに沿っていると判定された場合に前記他車移動軌跡を有効とする、請求項1に記載の車両の走行制御装置。 - 前記自車両の走行道路のカーブ半径を推定する半径推定手段(26)を備え、
前記進路算出手段は、前記自車両から前記先行車両までの車間区間について、
前記他車移動軌跡に基づいて前記予測進路を算出し、前記車間区間よりも遠くの区間について、前記他車移動軌跡に基づき算出した前記予測進路を、前記半径推定手段により推定した前記カーブ半径に基づいて延長することにより前記予測進路を算出する、請求項1又は2に記載の車両の走行制御装置。 - 自車両の将来の走行進路である予測進路に基づいて前記自車両の走行を制御する車両の走行制御装置であって、
前記自車両の前方を走行する先行車両の位置である先行車位置を時系列で記憶する位置記憶手段(25)と、
前記自車両の走行道路のカーブ半径を推定する半径推定手段(26)と、
前記自車両から前記先行車両までの車間区間について、前記位置記憶手段に記憶されている前記先行車位置の軌跡である他車移動軌跡に基づいて前記予測進路を算出し、前記車間区間よりも遠くの区間について、前記他車移動軌跡に基づき算出した前記予測進路を、前記半径推定手段により推定した前記カーブ半径に基づいて延長することにより前記予測進路を算出する進路算出手段(20)と、
を備える、車両の走行制御装置。 - 自車両の将来の走行進路である予測進路に基づいて前記自車両の走行を制御する車両の走行制御方法であって、
前記自車両が走行する道路上又は該道路脇において前記道路に沿って設けられている静止対象物の位置を所定の検出装置により検出する工程(11,12)と、
前記自車両の前方を走行する先行車両の位置である先行車位置を所定の記憶装置に時系列で記憶する工程(25)と、
前記記憶装置に記憶されている前記先行車位置の軌跡である他車移動軌跡と、前記検出装置によって検出した前記静止対象物の位置とを比較して、前記他車移動軌跡が前記道路の形状に沿っているか否かを判定する工程(20:S103,S104)と、
前記他車移動軌跡が前記道路の形状に沿っていると判定された場合に前記他車移動軌跡を有効とし、前記道路の形状に沿っていないと判定された場合に前記他車移動軌跡を無効とし、有効とした前記他車移動軌跡に基づいて前記予測進路を算出する工程(20:S105,S106,S107)と、
を含む、車両の走行制御方法。
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| US15/529,953 US10780884B2 (en) | 2014-11-28 | 2015-11-16 | Vehicle cruise control apparatus and vehicle cruise control method |
| DE112015005374.3T DE112015005374B4 (de) | 2014-11-28 | 2015-11-16 | Fahrzeugfahrsteuervorrichtung und fahrzeugfahrsteuerverfahren |
| CN201580064183.6A CN107000745B (zh) | 2014-11-28 | 2015-11-16 | 车辆的行驶控制装置以及行驶控制方法 |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN107000745B (zh) | 2019-05-17 |
| DE112015005374T5 (de) | 2017-08-03 |
| DE112015005374B4 (de) | 2025-07-10 |
| JP6321532B2 (ja) | 2018-05-09 |
| US10780884B2 (en) | 2020-09-22 |
| CN107000745A (zh) | 2017-08-01 |
| JP2016101889A (ja) | 2016-06-02 |
| US20170327118A1 (en) | 2017-11-16 |
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