WO2012046297A1 - 衝突判定装置 - Google Patents
衝突判定装置 Download PDFInfo
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- WO2012046297A1 WO2012046297A1 PCT/JP2010/067450 JP2010067450W WO2012046297A1 WO 2012046297 A1 WO2012046297 A1 WO 2012046297A1 JP 2010067450 W JP2010067450 W JP 2010067450W WO 2012046297 A1 WO2012046297 A1 WO 2012046297A1
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- host vehicle
- arrival time
- vehicle
- shortest arrival
- collision
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- 238000012937 correction Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 abstract description 10
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000001133 acceleration Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/166—Anti-collision systems for active traffic, e.g. moving vehicles, pedestrians, bikes
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/095—Predicting travel path or likelihood of collision
- B60W30/0953—Predicting travel path or likelihood of collision the prediction being responsive to vehicle dynamic parameters
-
- 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
- B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
- B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
- B60W30/095—Predicting travel path or likelihood of collision
- B60W30/0956—Predicting travel path or likelihood of collision the prediction being responsive to traffic or environmental parameters
-
- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/16—Anti-collision systems
- G08G1/161—Decentralised systems, e.g. inter-vehicle communication
Definitions
- the present invention relates to a collision determination device.
- a route evaluation device that evaluates the route of a moving body
- a route setting device that evaluates and sets a route that a specific object included in a plurality of objects can take is known (for example, see Patent Document 1).
- a change in position that a plurality of objects can take with the passage of time is generated as a trajectory on a time space composed of time and space.
- the path of a plurality of objects is predicted using the trajectory, and the degree of interference between the path that a specific object can take and the path that other objects can take is quantitatively calculated based on the prediction result. Then, the course that is least likely to interfere with another object is determined as the course that the particular object should take.
- the traveling efficiency of the host vehicle is considered. It has not been. If the conventional route setting device tries to perform the control in consideration of the traveling efficiency of the host vehicle, there arises a problem that the processing load increases as the amount of calculation increases, resulting in poor feasibility. Therefore, in order to ensure the traveling efficiency of the host vehicle while avoiding a collision, it is necessary to further improve the processing load.
- the present invention has been made for the purpose of solving the above problems, and an object of the present invention is to provide a collision determination device capable of reducing the processing load while avoiding a collision with another object.
- a collision determination apparatus includes a host vehicle course candidate acquisition unit that acquires a course candidate of the host vehicle, another object state acquisition unit that acquires a state of another object, and another object state. Based on the state of the other object acquired by the acquisition unit, when the other object moves by a predetermined first movement amount, the shortest time to reach each point on the route candidate of the own vehicle acquired by the route candidate acquisition unit Based on the shortest arrival time calculating means for calculating the arrival time, and the shortest arrival time calculated by the shortest arrival time calculating means and the passing time of each point on the route candidate of the own vehicle, the collision between the own vehicle and another object A collision determination means for determining the possibility.
- this collision determination device based on the shortest arrival time calculated by the shortest arrival time calculation means and the passing time of each point on the route candidate of the own vehicle acquired by the own vehicle route candidate acquisition means, Determine the possibility of collision with an object.
- the possibility of collision with the object can be determined. Therefore, it is possible to reduce a calculation load for determining a collision and to accurately determine a collision between the host vehicle and another object.
- the collision determination device it is possible to reduce the processing load while avoiding a collision with another object.
- the collision determination means may cause the own vehicle and another object to collide when the shortest arrival time calculated by the shortest arrival time calculation means is smaller than the passing time of each point on the route candidate of the own vehicle. It is preferable to determine that there is.
- the shortest arrival time is larger than the passing time of each point on the route candidate of the own vehicle, the collision between the own vehicle and another object is avoided. Therefore, by using the relationship that the shortest arrival time is smaller than the passing time of each point on the route candidate of the own vehicle (shortest arrival time ⁇ passing time), the possibility of collision between the other object and the own vehicle is more appropriately detected. Can be determined.
- the collision determination means automatically detects when the shortest arrival time calculated by the shortest arrival time calculation means is smaller than the passing time of each point on the route candidate of the own vehicle and the speed of the own vehicle is larger than a predetermined speed. It is preferable to determine that there is a possibility of collision between the vehicle and another object. According to such a configuration, since the traveling state of the host vehicle is added to the determination of the possibility of collision, the determination of the possibility of collision between the host vehicle and another object can be performed more accurately.
- each of the route candidates on the own vehicle acquired by the route candidate acquisition unit The longest dwell time calculation means for calculating the longest dwell time passing through the point is further provided, and the collision determination means is configured such that the shortest arrival time calculated by the shortest arrival time calculation means is greater than the passing time of each point on the route candidate of the own vehicle. And when the longest stay time calculated by the longest stay time calculation means is larger than the passing time of each point on the route candidate of the own vehicle, it is determined that there is a possibility that the own vehicle and another object collide with each other. It is preferable to do.
- the collision possibility is determined based on the plurality of movement states of the other object, the collision possibility between the host vehicle and the other object can be determined with higher accuracy. As a result, reliability can be improved.
- the “longest residence time passing through each point” indicates, in other words, the latest time that passes through each point.
- the route candidate correcting unit corrects the route candidate of the host vehicle acquired by the route candidate acquiring unit to a route candidate when the host vehicle takes an avoidance action from a predetermined point
- the shortest arrival time calculating unit includes: When the other object moves by the predetermined first movement amount, the shortest arrival time to reach each point on the route candidate of the host vehicle corrected by the route candidate correction unit is calculated, and the collision determination unit If the shortest arrival time calculated by the calculation means is smaller than the time passing through each point on the course candidate of the host vehicle corrected by the course candidate correction means, there is a possibility that the host vehicle and another object collide. Is preferably determined.
- the longest residence time calculating means calculates the longest residence time passing through each point on the course candidate of the host vehicle corrected by the course candidate correcting means when the other object decelerates by the predetermined second movement amount.
- the collision determination means is such that the shortest arrival time calculated by the shortest arrival time calculation means is smaller than the time passing through each point on the route candidate of the host vehicle corrected by the course candidate correction means, and the longest residence time calculation means It is preferable to determine that there is a possibility of collision between the host vehicle and another object when the longest residence time calculated by the above is greater than the time of each point on the route candidate of the host vehicle. According to such a configuration, since the collision possibility is determined based on the plurality of movement states of the other object, the collision possibility between the host vehicle and the other object can be determined with higher accuracy. As a result, reliability can be improved.
- the present invention it is possible to reduce the processing load while avoiding a collision with another object. Thereby, the traveling efficiency of the host vehicle can be ensured.
- FIG. 1 is a block diagram illustrating a configuration of the collision determination device according to the first embodiment.
- FIG. 2 is a flowchart showing the operation of the collision determination device.
- FIG. 3 is a diagram for explaining the operation of the collision determination device.
- FIG. 4 is a diagram for explaining the operation of the collision determination device.
- FIG. 5 is a flowchart showing another operation of the collision determination device.
- FIG. 6 is a diagram for explaining another operation of the collision determination device.
- FIG. 7 is a diagram for explaining another operation of the collision determination device.
- FIG. 8 is a block diagram illustrating a configuration of the collision determination device according to the second embodiment.
- FIG. 9 is a diagram for explaining the operation of the collision determination device according to the second embodiment.
- FIG. 10 is a flowchart showing the operation of the collision determination device according to the second embodiment.
- FIG. 1 is a block diagram showing the configuration of the collision determination device according to the first embodiment of the present invention.
- the collision determination apparatus 1 includes a host vehicle course candidate acquisition unit (host vehicle course candidate acquisition unit) 11, a moving body state acquisition unit (other object state acquisition unit) 12, and a moving body determination unit 13.
- a moving body route candidate generation unit 14 a shortest arrival time calculation unit (shortest arrival time calculation unit) 15, a longest residence time calculation unit (longest residence time calculation unit) 16, and a collision determination unit (collision determination unit) 17.
- a host vehicle course candidate acquisition unit host vehicle course candidate acquisition unit
- moving body state acquisition unit other object state acquisition unit
- a moving body route candidate generation unit 14 a shortest arrival time calculation unit (shortest arrival time calculation unit) 15, a longest residence time calculation unit (longest residence time calculation unit) 16 and a collision determination unit (collision determination unit) 17.
- collision determination unit collision determination unit
- the collision determination apparatus 1 includes a CPU (Central Processing Unit) that performs calculations, a ROM (Read Only Memory) that stores programs for causing the CPU to execute each process, and a RAM (RAM that stores various data such as calculation results.
- An electronic control unit (ECU) comprising a random access memory (Random Access Memory) or the like.
- the own vehicle course candidate acquisition unit 11 is a part that acquires a course candidate of the own vehicle.
- the course candidate of the host vehicle is a future course candidate generated from information such as the position, speed, and direction of the host vehicle by a course candidate generation unit (not shown), and preferably each point of the host vehicle at a certain time (t)
- the information of (position: x, y) is included.
- the host vehicle course candidate acquisition unit 11 outputs host vehicle path candidate information indicating the acquired course candidate of the host vehicle to the shortest arrival time calculation unit 15, the longest residence time calculation unit 16, and the collision determination unit 17. It should be noted that even if the route candidate is based on the information on the position (x, y) and the velocity (Vx, Vy), the same information can be output by an appropriate calculation process.
- the moving body state acquisition unit 12 is a part that acquires the current state of the moving body.
- a moving object is a pedestrian (including a bicycle) or another vehicle, and the current state of the moving object is information necessary for calculating the time required for the moving object to reach a certain time.
- a part of the information can be omitted when an appropriate assumption is made for the moving object.
- This moving body state may be detected from surrounding information including an object around the host vehicle, the position of another vehicle, or the like, or may be detected by inter-vehicle communication or the like.
- the moving body state acquisition unit 12 outputs moving body state information indicating the acquired state of the moving body to the shortest arrival time calculation unit 15 and the longest residence time calculation unit 16.
- the surrounding information including the surrounding objects of the own vehicle and the position of other vehicles is acquired by a driving state acquisition unit (not shown), and the driving state acquisition unit is a vehicle such as the vehicle speed and steering angle.
- a travel state including travel information, ambient information obtained by sensing the position and speed of objects around the host vehicle and other vehicles, and travel route information such as a map is acquired.
- the moving object determination unit 13 is a part that determines how the moving object can move in the future.
- the moving body determination unit 13 performs image processing based on, for example, image information of an image captured by a camera mounted on the host vehicle, and determines whether the moving body is a pedestrian or a vehicle. If it is determined that the moving body is a vehicle, the moving body is treated as being in a state that relatively complies with conditions (traffic classification, road direction, etc.) in which the moving body is permitted to move. When it is determined that the moving body is a pedestrian, the moving body is treated as being in a state that relatively does not comply with conditions (traffic classification, road direction, etc.) in which the moving body is permitted to move.
- the moving body determination unit 13 outputs determination result information indicating the determined result to the moving body course candidate generation unit 14, the shortest arrival time calculation unit 15, and the longest residence time calculation unit 16.
- the determination of the moving body may be made based on the movement of the moving body so far. Moreover, you may determine the vehicle (for example, two-wheeled vehicle etc.) which does not observe the conditions in which movement is permitted relatively, the pedestrian who observes, etc. as a kind of moving body.
- the moving body route candidate generation unit 14 is a part that calculates a moving body route candidate.
- the moving body route candidate generation unit 14 receives the determination result information output from the moving body determination unit 13, if the determination result information indicates that the moving body is another vehicle (vehicle), Is calculated based on information such as the shape of the road around the other vehicle.
- the moving body route candidate generation unit 14 outputs the moving body route information indicating the calculated moving body route candidate to the shortest arrival time calculation unit 15 and the longest residence time calculation unit 16.
- the shortest arrival time calculation unit 15 is a part that calculates the shortest arrival time to reach each point on the route candidate of the host vehicle when the moving body moves from the initial speed by a predetermined first movement amount.
- the shortest arrival time calculation unit 15 receives the mobile body state information output from the mobile body state acquisition unit 12 and also receives the determination result information output from the mobile body determination unit 13, the mobile body walks in the determination result information.
- the moving body accelerated at a predetermined acceleration (first movement amount: 0.3 G, for example) from the initial speed to a predetermined maximum speed for each point on the course candidate of the host vehicle.
- the shortest arrival time t min that can be reached in this case is calculated.
- the shortest arrival time calculation unit 15 adds information related to the calculated shortest arrival time t min to the road data, and outputs road data information related to the road data to the collision determination unit 17.
- the shortest arrival time calculation unit 15 when the moving body indicates a vehicle in the determination result information, based on the moving body route information output from the moving body route candidate generation unit 14, the road network of the moving body For each of the points, the shortest arrival time t min that can be reached when the moving body accelerates from the initial speed to a predetermined maximum speed (maximum speed given to the road network + ⁇ ) at a predetermined acceleration is calculated.
- the shortest arrival time calculation unit 15 gives information related to the calculated shortest arrival time t min to the road network, and outputs road network information related to the road network to the collision determination unit 17.
- the longest dwell time calculation unit 16 calculates the longest dwell time (the latest time to pass) that passes each point on the route candidate of the host vehicle when the moving body decelerates from the initial speed by a predetermined second movement amount. This is the part to calculate.
- the longest residence time calculation unit 16 receives the mobile body state information output from the mobile body state acquisition unit 12 and the determination result information output from the mobile body determination unit 13, the mobile body walks in the determination result information.
- the moving body is decelerated from the initial speed to the predetermined minimum speed (second movement amount: for example, ⁇ 0.3 G) for each point on the route candidate of the host vehicle.
- the longest residence time tmax that passes through each point on the route candidate of the host vehicle is calculated.
- the longest residence time calculation unit 16 assigns information related to the calculated longest residence time tmax to the road data, and outputs road data information related to the road data to the collision determination unit 17.
- the longest residence time calculating unit 16 determines the road network of the moving body based on the moving body route information output from the moving body route candidate generating unit 14. The longest dwell time that passes through each point on the road network when the moving body decelerates from the initial speed to the predetermined minimum speed (minimum speed assigned to the road network- ⁇ ) at a predetermined deceleration. t max is calculated.
- the longest residence time calculation unit 16 assigns information related to the calculated longest residence time tmax to the road network, and outputs road network information related to the road network to the collision determination unit 17.
- the collision determination unit 17 is a part that determines the possibility of collision between the host vehicle and the moving body.
- the collision determination unit 17 receives the route candidate information output from the host vehicle route candidate acquisition unit 11 and the road data information output from the shortest arrival time calculation unit 15 and the longest residence time calculation unit 16. Then, the collision determination unit 17 determines that, at each point (x, y, t) on the route candidate indicated by the route candidate information, the passing time t when the host vehicle passes each point is the shortest arrival time indicated by the shortest arrival time information. It is determined whether it is larger than the time t min and smaller than the time t max indicated by the longest residence time information (t min ⁇ t ⁇ t max ), and whether or not the speed V of the host vehicle is V> V m is determined.
- V m is an arbitrarily set value, and is preferably “0”.
- the collision determination unit 17 When the collision determination unit 17 receives the route candidate information output from the own vehicle route candidate acquisition unit 11 and the road network information output from the shortest arrival time calculation unit 15 and the longest residence time calculation unit 16, the collision determination unit 17 When the position interferes with the road network of another vehicle, the passing time t when the host vehicle passes through the point is larger than the shortest arrival time t min and smaller than the longest residence time t max (t min ⁇ t ⁇ t max ) Or not. When it is determined that t min ⁇ t ⁇ t max , the collision determination unit 17 outputs determination result information indicating that there is a possibility of collision between the host vehicle and another vehicle.
- the output determination result information is received by, for example, a traveling state setting device. In the traveling state setting device, the best own vehicle route candidate is selected based on the determination result information of a plurality of vehicle route candidates, and a control signal is output to a drive control unit and a steering control unit (both not shown).
- FIG. 2 is a flowchart showing the operation of the collision determination device
- FIGS. 3 and 4 are diagrams for explaining the operation of the collision determination device.
- a course candidate for the host vehicle is acquired by the host course candidate acquisition unit 11 (step S01).
- the initial state (position, speed, direction, etc.) of the pedestrian (moving body) is acquired by the moving body state acquisition unit 12 (step S02).
- the shortest arrival time t min is calculated by the shortest arrival time calculation unit 15 (step S03).
- the longest residence time tmax is calculated by the longest residence time calculation unit 16 (step S04), and information regarding the shortest arrival time tmin and the longest residence time tmax is given to the road data. Specifically, as shown in FIG.
- the collision determination unit 17 determines the possibility of collision based on the passing time t of each point on the route candidate of the subject vehicle (step S05), and t min ⁇ t ⁇ t max and V> V m It is determined whether or not (step S06).
- the passing time t A is smaller than the shortest arrival time t min (t A ⁇ t min ). It is determined that there is no possibility of a collision between the pedestrian H and the host vehicle M.
- the passage time t B is larger than the shortest arrival time t min and smaller than the longest residence time t max and V> V m (t min ⁇ t ⁇ t max , V> V m ), so that it is determined that there is a possibility of a collision between the pedestrian H and the host vehicle M.
- step S05 If it is determined in step S05 that t min ⁇ t ⁇ t max and V> V m , a determination result indicating that is output (step S07). On the other hand, if it is not determined in step S06 that t min ⁇ t ⁇ t max and V> V m , the process ends.
- FIG. 5 is a flowchart showing the operation of the collision determination device
- FIGS. 6 and 7 are diagrams for explaining the operation of the collision determination device.
- a course candidate for the host vehicle is acquired by the host course candidate acquisition unit 11 (step S11).
- the initial state (position, speed, direction, etc.) of the other vehicle (moving body) is acquired by the moving body state acquisition unit 12 (step S12).
- the shortest arrival time t min is calculated by the shortest arrival time calculation unit 15 (step S13).
- the longest residence time tmax is calculated by the longest residence time calculation unit 16 (step S14), and information relating to the shortest arrival time tmin and the longest residence time tmax is given to the road network. Specifically, as shown in FIG.
- the passing time t A is smaller than the shortest arrival time t min (t A ⁇ t min ). It is determined that there is no possibility of a collision between the other vehicle M2 and the host vehicle M.
- the passage time t B is larger than the shortest arrival time t min and smaller than the longest residence time t max (t min ⁇ t ⁇ t max ). It is determined that there is a possibility of collision between the other vehicle M2 and the host vehicle M.
- the collision determination device 1 the shortest arrival time t min calculated by the shortest arrival time calculation unit 15 and the passing time t of each point of the host vehicle acquired by the host vehicle course candidate acquisition unit 11. Based on this, the possibility of collision between the host vehicle and another object is determined. In this way, by determining the shortest arrival time at which the other object can reach each point of the course candidate of the own vehicle with the predetermined first movement amount without generating the trajectory that the other object can take, the own vehicle and the other object The possibility of a collision with can be determined. Therefore, it is possible to reduce a calculation load for determining a collision and to accurately determine a collision between the host vehicle and another object. Thus, in the collision determination device, it is possible to reduce the processing load while avoiding a collision with another object.
- the collision determination unit 17 collides with the own vehicle and another object. Judge that there is a possibility.
- the shortest arrival time t min is smaller than the passing time t of each point on the route candidate of the host vehicle, the collision between the host vehicle and another object is avoided. Therefore, by using a relationship such as shortest arrival time t min is smaller than the passage time t for each point on the route candidate of the host vehicle (the shortest arrival time t min ⁇ passage time t), the self and better another object vehicle It is possible to determine the possibility of collision.
- the collision determination unit 17 determines that the shortest arrival time t min calculated by the shortest arrival time calculation unit 15 is smaller than the passing time t of each point on the route candidate of the own vehicle, and the speed V of the own vehicle is a predetermined speed. When it is larger than V m , it is determined that there is a possibility of collision between the host vehicle and another object. According to such a configuration, since the traveling state of the host vehicle is added to the determination of the possibility of collision, the determination of the possibility of collision between the host vehicle and another object can be performed more accurately. In the present embodiment, the collision determination is performed using the speed, but anything may be used as long as the collision can be quantitatively evaluated. For example, physical quantities such as collision energy and impulse specified from the size of the moving body may be used. Alternatively, it is also possible to give economic value to the moving object for each person and each objective, estimate the economic loss amount, and use the loss amount.
- the moving body decelerates based on the state of the moving body acquired by the moving body state acquisition unit 12, it passes through each point on the route candidate of the own vehicle acquired by the own vehicle route candidate acquisition unit 11. to comprise the longest residence time calculating unit 16 for calculating the maximum residence time t max, the collision determination unit 17, the shortest arrival time t min calculated by the shortest arrival time calculation unit 15 of each point on the route candidate of the vehicle
- the longest residence time tmax calculated by the longest residence time calculation unit 16 is smaller than the passage time t and larger than the passage time t of each point on the route candidate of the own vehicle, the own vehicle and the other object are It is determined that there is a possibility of collision.
- the collision possibility is determined based on the plurality of movement states of the other object, the collision possibility between the host vehicle and the other object can be determined with higher accuracy. As a result, reliability can be improved.
- the collision determination apparatus 1 ⁇ / b> A according to the second embodiment is different from the first embodiment in that a host vehicle course candidate correction unit (course candidate correction means) 18 is provided.
- the own vehicle course candidate correcting unit 18 is a part for correcting the own course candidate acquired by the own vehicle course candidate acquiring unit 11. Upon receiving the route candidate information output from the own vehicle route candidate acquisition unit 11, the own vehicle route candidate correcting unit 18 starts from the portion (predetermined point) that is necessarily executed by the own vehicle, and starts from that point. As part of the avoidance action, change (change) partly.
- the host vehicle course candidate correcting unit 18 generates a course candidate in which the speed is reduced, that is, the speed control amount is changed in the course candidate indicated by the host vehicle course candidate information. More specifically, as shown in FIG. 9A, the host vehicle course candidate correcting unit 18 is ahead of the part that is necessarily executed on the course candidate (the part that may be changed in the next calculation cycle).
- n (1, 2,..., N) avoidance actions set in advance, for example, sudden braking, normal braking, and the like.
- sudden steering or rapid acceleration may be set as the avoidance action.
- the host vehicle course candidate correcting unit 18 applies, for example, a course in which the host vehicle M applied a sudden brake or a normal brake (for example, ⁇ 0.1G) as a course to take an avoidance action. Correct the course according to the avoidance action.
- a sudden brake or a normal brake for example, ⁇ 0.1G
- the host vehicle course candidate correcting unit 18 outputs the corrected course candidate information indicating the corrected course candidate of the host vehicle to the shortest arrival time calculation unit 15, the longest residence time calculation unit 16, and the collision determination unit 17.
- the shortest arrival time calculation unit 15 receives the corrected route candidate information output from the own vehicle route candidate correction unit 18, the shortest arrival time for each point on the route candidate of the own vehicle indicated by the corrected route candidate information.
- an action in the action range (n: 1, ..., n) associated with the avoidance action of the host vehicle included in the corrected course candidate information for example, normal acceleration / deceleration or steering,
- a time t min that can reach each point on the route candidate earliest is calculated.
- the shortest arrival time calculation unit 15 gives information related to the calculated shortest arrival time t min to the road data or the road network, and outputs the shortest arrival time information related to the road data or the road network to the collision determination unit 17.
- the longest residence time calculation unit 16 receives the corrected route candidate information output from the own vehicle route candidate correction unit 18, the longest residence time is calculated for each point on the route candidate of the own vehicle indicated by the corrected route candidate information.
- an action in the action range (n: 1, ..., n) associated with the avoidance action of the host vehicle included in the corrected course candidate information for example, normal acceleration / deceleration or steering,
- a time t max that passes each point on the course candidate (the latest time that passes) is calculated.
- the longest residence time calculation unit 16 gives the information related to the calculated longest residence time tmax to the road data or the road network, and outputs the longest residence time information regarding the road data or the road network to the collision determination unit 17.
- the collision determination unit 17 receives the shortest arrival time information output from the shortest arrival time calculation unit 15 and the longest residence time information output from the longest residence time calculation unit 16, the own vehicle determines each point on the route candidate. It is determined whether or not the passing time t passing is greater than the shortest arrival time t min indicated by the shortest arrival time information, and is less than or equal to the longest residence time tmax indicated by the longest residence time information (t min ⁇ t ⁇ t max ). . If the collision determination unit 17 determines that t min ⁇ t ⁇ t max , the collision determination unit 17 evaluates that there is a possibility of collision between the host vehicle and the pedestrian, and outputs evaluation result information indicating that.
- FIG. 10 is a flowchart showing the operation of the collision determination device.
- a course candidate for the own vehicle is acquired by the own car course candidate acquisition unit (step S21).
- the acquired course candidate of the host vehicle is corrected to a course candidate when the host vehicle path candidate correcting unit 18 takes an avoidance action accompanied by deceleration (step S22).
- the longest arrival time t min that can reach each of the above points is calculated by the shortest arrival time calculator 15 (step S23).
- the longest staying time calculation unit 16 calculates the longest staying time passing through the point (the latest time that passes by) tmax (step S24).
- step S25 The shortest arrival time t min calculated by the shortest arrival time calculation unit 15 and the longest residence time t max calculated by the longest residence time calculation unit 16 and the course of the host vehicle corrected by the host vehicle route candidate correction unit 18 Based on the passage time t of each point on the candidate, the collision possibility is determined by the collision determination unit 17 (step S25), and it is determined whether or not t min ⁇ t ⁇ t max (step S26). . If it is determined in step S26 that t min ⁇ t ⁇ t max , a determination result indicating that is output (step S27). On the other hand, if it is not determined in step S26 that t min ⁇ t ⁇ t max , the process is terminated.
- a candidate for a route when an avoidance action accompanied by deceleration (for example, sudden braking, normal braking, etc.) is performed at a time point after a part where the candidate candidate for the own vehicle is always executed.
- the own vehicle course candidate correcting unit 18 corrects the vehicle.
- the collision determination unit 17 determines whether the time t at which the host vehicle passes each point on the route candidate is greater than the shortest arrival time t min and smaller than the longest residence time t max (t min ⁇ t ⁇ t max ) It is determined whether or not, and if t min ⁇ t ⁇ t max, it is determined that there is a possibility of collision between the host vehicle and the pedestrian.
- the host vehicle when the host vehicle waits for a right turn, it can avoid an unnatural action such as entering the vehicle without decelerating immediately before the right turn waiting point and then applying a sudden brake. Therefore, the host vehicle can respond to a normal action in which another vehicle goes straight ahead with a gentle acceleration, and a natural action can be taken by a slow deceleration even in a right turn waiting state.
- the present invention is not limited to the above embodiment.
- the shortest arrival time t min is calculated by the shortest arrival time calculator 15
- the longest residence time t max is calculated by the longest residence time calculator 16
- the shortest arrival time t min and
- the collision determination unit 17 determines the possibility of collision between the host vehicle and the moving body based on the longest residence time tmax , the possibility of collision may be determined using only the shortest arrival time tmin. .
- the collision determination unit 17 determines that there is a possibility of collision when t min ⁇ t with respect to the passage time t when the host vehicle passes through each point on the route candidate.
- the collision determination unit 17 determines that there is a possibility of a collision when t min ⁇ t and V> V m with respect to the passing time t when the host vehicle passes through each point on the route candidate. Also good. In this case, since the speed of the host vehicle M is taken into consideration, it is possible to avoid the possibility of a collision in a state in which a pedestrian or the like enters the parked host vehicle.
- the course candidates are corrected so that the avoidance action accompanied by the deceleration (for example, sudden braking, normal braking, etc.) is taken at a time point after the part that is always executed in the road network.
- the avoidance action performed by the host vehicle may be set only for sudden braking.
- the host vehicle course candidate correcting unit 18 corrects the course candidate to a path where the host vehicle suddenly brakes and stops, and the collision determination unit 17 satisfies t min ⁇ t ⁇ t max and V> V m . It is determined that there is a possibility of collision.
- the possibility of a collision can be determined from the viewpoint of “it is still possible to avoid a collision by changing the course in the next calculation cycle”, so that the deceleration is postponed while ensuring that there is no collision.
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Abstract
Description
図1は、本発明の第1実施形態に係る衝突判定装置の構成を示すブロック図である。図1に示すように、衝突判定装置1は、自車両進路候補取得部(自車両進路候補取得手段)11と、移動体状態取得部(他物体状態取得手段)12と、移動体判定部13と、移動体進路候補生成部14と、最短到達時刻算出部(最短到達時刻算出手段)15と、最長滞留時刻算出部(最長滞留時刻算出手段)16と、衝突判定部(衝突判定手段)17とを備えている。なお、衝突判定装置1は、演算を行うCPU(Central Processing Unit)、CPUに各処理を実行させるためのプログラム等を記憶するROM(Read Only Memory)、演算結果などの各種データを記憶するRAM(Random Access Memory)等から構成される電子制御ユニット(ECU:Electrical Control Unit)である。
続いて、本発明の第2実施形態に係る衝突判定装置について説明する。図8に示すように、第2実施形態に係る衝突判定装置1Aは、自車両進路候補修正部(進路候補修正手段)18を備える点で第1実施形態と異なっている。
Claims (6)
- 自車両の進路候補を取得する自車両進路候補取得手段と、
他物体の状態を取得する他物体状態取得手段と、
前記他物体状態取得手段によって取得された前記他物体の状態に基づいて、前記他物体が所定の第1移動量で移動した場合に、前記進路候補取得手段によって取得された前記自車両の進路候補上の各点に到達する最短到達時刻を算出する最短到達時刻算出手段と、
前記最短到達時刻算出手段によって算出された前記最短到達時刻と前記自車両の前記各点の通過時刻とに基づいて、前記自車両と前記他物体との衝突可能性を判定する衝突判定手段と、
を備えることを特徴とする衝突判定装置。 - 前記衝突判定手段は、前記最短到達時刻算出手段によって算出された前記最短到達時刻が前記自車両の進路候補上の各点の通過時刻よりも小さい場合に、前記自車両と前記他物体とが衝突する可能性があると判定する請求項1記載の衝突判定装置。
- 前記衝突判定手段は、前記最短到達時刻算出手段によって算出された前記最短到達時刻が前記自車両の進路候補上の各点の通過時刻よりも小さく、且つ前記自車両の速度が所定速度よりも大きい場合に前記自車両と前記他物体とが衝突する可能性があると判定する請求項2記載の衝突判定装置。
- 前記他物体状態取得手段によって取得された前記他物体の状態に基づいて、前記他物体が所定の第2移動量で減速した場合に、前記進路候補取得手段によって取得された前記自車両の進路候補上の各点を通過する最長滞留時刻を算出する最長滞留時刻算出手段を更に備え、
前記衝突判定手段は、前記最短到達時刻算出手段によって算出された前記最短到達時刻が前記自車両の進路候補上の各点の通過時刻よりも小さく、且つ前記最長滞留時刻算出手段によって算出された前記最長滞留時刻が前記自車両の進路候補上の各点の通過時刻よりも大きい場合に、前記自車両と前記他物体とが衝突する可能性があると判定する請求項2又は3記載の衝突判定装置。 - 前記進路候補取得手段によって取得された前記自車両の進路候補を、所定の地点から前記自車両が回避行動をとった際の進路候補に修正する進路候補修正手段を備え、
前記最短到達時刻算出手段は、前記他物体が所定の第1移動量で移動した場合に、前記進路候補修正手段によって修正された前記自車両の進路候補上の各点に到達する最短到達時刻を算出し、
前記衝突判定手段は、前記最短到達時刻算出手段によって算出された前記最短到達時刻が前記進路候補修正手段によって修正された前記自車両の進路候補上の各点を通過する時刻よりも小さい場合に、前記自車両と前記他物体とが衝突する可能性があると判定する請求項1~4のいずれか一項記載の衝突判定装置。 - 前記最長滞留時刻算出手段は、前記他物体が所定の第2移動量で減速した場合に、前記進路候補修正手段によって修正された前記自車両の進路候補上の各点を通過する最長滞留時刻を算出し、
前記衝突判定手段は、前記最短到達時刻算出手段によって算出された前記最短到達時刻が前記進路候補修正手段によって修正された自車両の進路候補上の各点を通過する時刻よりも小さく、且つ前記最長滞留時刻算出手段によって算出された前記最長滞留時刻が前記自車両の進路候補上の各点の時刻よりも大きい場合に、前記自車両と前記他物体とが衝突する可能性があると判定する請求項5記載の衝突判定装置。
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