Abstract:
A device for the supported parking of a vehicle in a parking space is disclosed. The device includes at least one sensor device allowing the detection of at least one object at a near range from the vehicle. The device is implemented for numerically determining the presence of at least one object at a far range from the vehicle, such that the numerical determining of the object in the far range takes place on the basis of the object detected in the near range.

Description:
This application is a 35 U.S.C. §371 National Stage Application of PCT/EP2010/057109, filed on May 25, 2010, which claims the benefit of priority to Serial No. DE 10 2009 027 650.5, filed on Jul. 13, 2009 in Germany, the disclosures of which are incorporated herein by reference in their entirety. 
     The present disclosure relates to a device and a method for the assisted parking of a vehicle in a parking space, having at least one sensor device with which detection of at least one object in the close range of the vehicle is made possible. 
     DE 10 2005 037 468 A1 discloses a device for the assisted parking of a vehicle in a parking space according to the present generic type. The parking space relates to a parking space which is arranged transversely with respect to the vehicle, wherein the sensor device is embodied as a parking space measuring device. If the vehicle is moved past the parking space at a preferably low speed, the sensor device, in the form of a radar, an ultrasonic sensor or a LIDAR sensor, can scan the geometric configuration of the parking space. If the vehicle stops, the device can determine movement paths on the basis of the measurement data relating to the parking space, in order to park the vehicle in the parking space. The movement paths determined by the device are embodied in such a way that the vehicle can be moved as easily as possible into the parking space. For this purpose, either the movement path is displayed to the driver or the device intervenes actively in the control of the vehicle in order to park it automatically in the parking space. 
     While the vehicle is driving past the parking space, at least partial geometric measurement of the parking space is performed. During this measurement it is possible, if appropriate, that the entire geometry of the parking space is not detected, with the result that missing regions which are not covered, in particular rear regions of the parking space, are filled in by the sensor device by means of stored typical parking space patterns. Possible movement paths for steering the vehicle into the parking space are determined on the basis of the measurement of the parking space and by taking into account fixed vehicle geometry data which are predefined by the actual vehicle which is to be parked. 
     However, a disadvantage of such a device is that the sensor device has a limited sensor range and missing regions which cannot be covered and which are also outside the parking space cannot be made available to the device as input data. If the vehicle is not driven on past the parking space, the sensor device can only evaluate the close range which describes the direct region around the vehicle and which is covered by the sensor device. If the device then makes available movement paths which go beyond the close range, a situation may occur in which the device predefines a movement path which can lead to a collision of the vehicle with objects which have not been detected by the system. 
     SUMMARY 
     The objective of the present disclosure is to provide a device for the assisted parking of a vehicle in a parking space, which device avoids a possible collision of the vehicle with objects which have not been detected. 
     This objective is achieved on the basis of a device for the assisted parking of a vehicle in a parking space as set forth below and a method for this purpose also set forth below. Advantageous developments of the device and method are also set forth below. 
     The disclosure includes the technical teaching that the device is designed to perform numerical determination of the presence of at least one object in the long range of the vehicle, such that the numerical determination of the object in the long range is carried out on the basis of a detected object in the close range. 
     A parking space is frequently linked to recurring ambient situations in road traffic. If the driver of a vehicle detects a parking space and if the driver drives the vehicle slowly past the parking space in such a way that the sensor device can measure the parking space, the parking space is frequently bounded by other vehicles or structural surroundings. If the sensor device detects objects in the close range of the vehicle, it can be assumed with probability that the objects either repeat within a long range or extend continuously into the long range, this relating, for example, to structural surroundings such as a wall, a curb, a roadway boundary or the like. 
     If no corresponding object is detected within the close range, it can be assumed that there is no corresponding object located in the long range. However, if the sensor device detects at least one object which also still has a certain position within the close range, it is proposed according to the disclosure to transmit an image from the close range into the long range by means of the device by assuming that the objects which are detected in the close range repeat in the long range or extend into the latter. Consequently, not only is it possible for the assistance of the parking of the vehicle in the parking space to be carried out on the basis of the detected objects within the close range, the device can also assist the parking process by taking into account assumed objects in the long range. 
     The close range is determined by the region within which objects can be detected with the sensor device, and wherein the long range relates to the region around, and in particular in front of, the vehicle in the direction of travel, which region lies outside the range of the sensor device. In particular when the driver merely drives the vehicle past the parking space to such an extent that the objects within the close range are detected, the sensor device cannot scan the region in front of the vehicle. The numerical determination of objects in front of the vehicle is therefore of particular importance since this region, in this case the long range, is, under certain circumstances, required for the assisted parking of the vehicle in the parking space and is traveled through by the vehicle. 
     The parking space may be present on one side of the direction of movement of the vehicle, wherein the parking space can either relate to a longitudinal parking space, a diagonal parking space or a transverse parking space. In this context, it is possible to provide that the detected object and the assumed object are present on the side of the direction of movement of the motor vehicle lying opposite the parking space. If the parking space is located, for example, on the right-hand side of the direction of movement of the vehicle, the sensor device can be embodied in such a way that not only the right-side region of the motor vehicle but also the left-side region lying opposite is scanned. Consequently, the detected objects and the assumed objects can be located on the side of the direction of movement of the vehicle lying opposite the parking space. The objects can be, for example, parked vehicles and/or structural installations. If, for example, the vehicle drives slowly past parking space which is located on the right-hand side of the direction of movement of the vehicle, the close range on the left-hand side of the vehicle, for example on the side of the road lying opposite, is scanned at the same time. If the sensor device detects objects on the left-hand side of the direction of movement of the vehicle, these objects form a basis for determining the long range in that it is assumed that objects on the side lying opposite the parking space are located not only in the close range but also in the long range. As a result, the device can form the maneuvers for parking in such a way that a collision of the vehicle with the detected objects in the close range as well as with assumed objects in the long range is avoided. 
     In order to assist the parking of the vehicle in the parking space, the device can determine at least one movement path for parking the vehicle in the parking space and can specify said movement path to the driver of the vehicle. According to the disclosure there is then provision that the at least one movement path is determined or modified by the device in such a way that a collision of the vehicle with an assumed object in the long range is avoided. It is basically known to avoid a collision with detected objects in the close range. However, above and beyond this prior art the numerical determination of possible objects in the long range can serve to configure the movement paths solely on the basis of the assumption of objects in the long range in such a way that a collision of the vehicle with the assumed objects is avoided. The position and arrangement of the objects in the long range is assumed here on the basis of the position and arrangement of the object or objects in the close range. If, for example, a plurality of vehicles are parked one next to the other on the side of the roadway lying opposite the parking space and if the sensor device detects these vehicles by scanning the close range, the device can determine the long range by assuming that the row of vehicles continues from the close range into the long range. If, for example, a structural installation such as a wall, a roadway boundary or the like is located in the close range and if the sensor device detects this object, the device determines a long range by assuming that this structural installation extends into the long range. Consequently, the device will propose and/or implement movement paths which are determined in such a way that a collision of the vehicle with the objects both in the close range and in the long range is avoided. 
     Furthermore it is possible to provide that the device comprises a display means which is configured to display detected objects in the close range and assumed objects in the long range. The driver of the vehicle therefore receives information about detected objects which are assumed to be in the long range through numerical determination. In addition, the movement paths which are determined by the device for parking the vehicle in the parking space can be displayed on the display means. Consequently, the driver is provided with an overview of assumed objects in the long range which are displayed in conjunction with the determined movement paths. 
     Furthermore, the device can comprise an input means which the driver can use to confirm to the device the presence of assumed objects in the long range. In this context, the input means and the display means can be embodied together by means of a sensor screen in the region of the driver in the vehicle, which screen can serve both to display the movement paths and the objects in the close range and long range as well as serving as an input means. If the system assumes that objects which are determined numerically by objects which are present in the close range are present in the long range, the driver can drive the vehicle into the parking space along the movement paths which are determined on the basis of the objects which are present. However, these movement paths can turn out to be more complicated than movement paths without objects in the long range. If, despite the presence of objects in the close range, there are, however, no objects in the long range and if the driver can detect this, the absence of objects in the long range can be specified using the input means of the device. Consequently, the movement paths can be re-determined, said movement paths turning out, under certain circumstances, to be simpler than when there are objects present in the long range. 
     The present disclosure also relates to a method for the assisted parking of a vehicle in a parking space having at least the following steps: detection of an object in the close range of the vehicle with at least one sensor device, determination of the presence of at least one object in the long range of the vehicle, such that the determination of the object in the long range is performed numerically on the basis of a determined object in the close range. Furthermore, the device can determine at least one movement path for parking the vehicle in the parking space and specify said movement path to the driver of the vehicle. The determination of the movement path for parking the vehicle is performed here by the device on the basis of both specific objects in the close range and the assumed objects in the long range. As a result, the at least one movement path can be determined by the device in such a way that a collision of the vehicle with an assumed object in the long range is avoided. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further measures which improve features of the disclosure are presented in more detail below together with the description of a preferred exemplary embodiment of the disclosure with reference to the figures. In the drawing: 
         FIG. 1  shows a schematic view of a parking situation with a vehicle and a parking space, 
         FIG. 2   a  shows a parking situation of a vehicle with a parking space, wherein a first movement path and a second movement path are specified, and wherein no objects are present in the close range or in the long range, 
         FIG. 2   b  shows a schematic view according to  FIG. 2   a , wherein an object is present in the close range and in the long range, 
         FIG. 3  shows a parking situation with a vehicle which is driven in a direction of movement, both past the parking space and past objects in the close range which are detected by a sensor device, 
         FIG. 4   a  shows a parking situation of a vehicle for parking in a parking space with an object which is present in the close range, and 
         FIG. 4   b  shows the parking situation according to  FIG. 4   a , wherein the close range does not contain any object which is detected by the sensor device. 
     
    
    
     DETAILED DESCRIPTION 
       FIG. 1  is a schematic view of a parking situation in a plan view explaining the detection of a parking space by a sensor device  12 . A vehicle  10  is moved along a direction X of movement, wherein the movement can take place on a road so that parking spaces  11  are present in the lateral direction with respect to the road. The sensor device  12  is provided on the right-hand side of the vehicle  10 . If the vehicle  10  is driven slowly past the objects  15 , here parked cars, which bound the parking space  11 , the sensor device  12  detects the parked cars  15 . LIDAR technology or ultrasonic technology can also be used as the sensor device. The sensor device  12  is based on a radar or an infrared measuring device, so that the device detects objects which are present next to the vehicle. If the vehicle  10  is moved in the direction X of movement, the left-hand vehicle  15  is firstly detected, followed by the parking space  11 . On the right-hand side, the parking space  11  is bounded by the other vehicle  15 , which is subsequently detected by the sensor device  12 . As a result, the device is provided with information about the presence of the parking space  11 . After the right-hand vehicle  15  has been detected by the sensor device  12 , the driver can stop the vehicle  10 . However, as a result the sensor device  12  has only detected the close range  13 , wherein objects cannot be detected in the long range  14  since the sensor device  12  is not moved into the long range  14 . 
       FIGS. 2   a  and  2   b  show a parking situation, wherein the vehicle  10  has already been driven past the parking space  11  and the device has determined movement paths  17  and  18  and specified them to the driver in order to park the vehicle  10  in the parking space  11 . In  FIG. 2   a , there is no further object  15  located on the side opposite the parking space  11 , while in  FIG. 2   b  an object  15  is shown which is located both in the close range  13  and in the long range  14 . If the vehicle  10  senses only the object  15  in the close range  13 , according to the prior art the device cannot detect that the object  15  also continues into the long range  14 . According to  FIG. 2   b , there will consequently be a collision of the vehicle  10  with the object  15  if the driver carries out the first movement path  17 . 
       FIG. 3  shows a further example of a parking situation for parking a vehicle  10  in a parking space  11 . The sensor device  12  is present both on the right-hand side of the vehicle and on the left-hand side of the vehicle. If the vehicle  10  is moved past the parking space  11  in the direction X of movement up to the position shown, the sensor device  12  can determine the presence of the parking space  11 , wherein the sensor device  12  can also determine the objects  15  in the close range  13  on the side lying opposite the parking space. According to the disclosure, the device is designed to numerically determine the presence of at least one object  16  in the shown long range  14  of the vehicle  10  in such a way that the numerical determination of the objects  16  in the long range  14  takes place on the basis of the detected objects  15  in the close range  13 . 
     Since the sensor device  12  detects the vehicles  15  on the left-hand side of the direction X of movement, the presence of the objects  16  is assumed through numerical determination without the sensor device  12  actively detecting the presence of the objects  16 . The driver will not move the vehicle on beyond the parking space  11  since as a result other road users could assume that the driver does not wish to occupy the parking space  11 . Consequently, the inventive numerical determination of the presence of the objects  16  by the sensor device  12  being moved past the objects  16  in the long range  14  without even a scanning process has the advantage that the driver does not have to move the vehicle  10  significantly beyond the parking space  11  in the direction X of movement. As a result, the device will propose movement paths  17  and  18  which are determined in such a way that a collision of the vehicle  10  with the objects  16  cannot occur in the long range  14 , as is illustrated schematically in more detail in  FIGS. 4   a  and  4   b.    
       FIGS. 4   a  and  4   b  show in turn a parking situation for parking a vehicle  10  in a parking space  11 . The vehicle  10  detects in  FIG. 4   a  both vehicles  15  parked on the right-hand side and an object  15  on the left-hand side of the direction X of movement. Owing to the presence of an object  15  in the close range  13 , the device determines an assumed obstacle boundary  19  since objects  16  are determined numerically in the long range  14  on the left-hand side of the direction X of movement by the device. However, the system determines the assumed obstacle boundary  19  even if objects  15  are not present in the long range  14 , see the illustration in  FIG. 4   a . If the sensor device  12  detects, according to the illustration in  FIG. 4   b , no objects  15  on the left-hand side of the direction X of movement, the device proposes a first movement path  17  which goes beyond the assumed obstacle boundary  19 , since on the basis of the given probability there is no object  16  present behind the obstacle boundary  19 . 
     The present disclosure is not restricted in its embodiment to the preferred exemplary embodiment specified above. Instead, a number of variants are conceivable which make use of the illustrated solution even with embodiments which are of a basically different type. All of the features and/or advantages which result from the claims, the description or the drawings, including structural details, spatial arrangements and method steps, may be essential to the disclosure either per se or in a wide variety of combinations. For example, it may also be provided to represent the objects  16  in the long range  14  in a different color or in a flashing fashion on the display means. The method can also comprise an interrogation step in which the device interrogates the driver of the vehicle  10  via the display means to determine whether objects  16  are actually present in the long range  14 . 
     Furthermore it is possible to provide that the sensor device  12  detects a certain object pattern on the left-hand side of the direction X of movement, which is the case, for example, when vehicles park at predefined intervals on road boundaries. Parking bays can also be interrupted regularly by structural installations, with the result that the surroundings detected in the close range  13  through the objects  15  are included in the calculation of the long range by the device. In particular it is to be noted that the specifications about the right-hand and left-hand sides of the direction X of movement can also be interchanged with one another. Consequently, the parking space  11  can also be located on the left-hand side of the direction X of movement of the vehicle  10 , with the result that by virtue of the determination according to the disclosure the long range  14  and the objects  16  located therein can also be present on the right-hand side of the direction X of movement. A movement path  17  and  18 , also referred to as a trajectory, can consequently be provided both for cutting in from the left and for cutting in from the right, wherein the parking space  11  does not necessarily have to relate to a transverse parking space but can also relate to a longitudinal parking space or a diagonal parking space.