JP4741394B2 - Parking assistance system - Google Patents

Description

  The present invention relates to a parking assistance system. Specifically, the present invention relates to a parking support system that searches for a road where parking is possible.

In general navigation, a search function for searching for a parking lot in the vicinity of a destination and guiding the driver is provided.
Patent Document 1 discloses a navigation device that searches for a parking lot that exists in the vicinity of a destination and provides data such as business date and time of the parking lot and availability information.
JP 2001-349740 A

By the way, by searching for navigation, when there is no parking lot near the destination, the vehicle is parked on a road where parking is possible near the destination. When a vehicle is parked on a road that can be parked, it is required by the Road Traffic Law to leave a space beyond the parking space. However, even if information about roads that can be parked is associated with the map data used for navigation, it is difficult for the driver to determine whether the space beyond the parking space can be secured when the vehicle is parked. is there.
Therefore, the present invention searches for a road that can be parked, determines whether a space beyond the parking space can be secured when a vehicle is parked on the road that can be parked, and if it is determined that parking is possible, the road that can be parked It is an object to provide a system that guides users.

  In order to solve the above problems, the present invention has the following configuration. That is, the first configuration of the present invention is the vehicle width data related to the vehicle width of the vehicle, the width data related to the width of the road associated with the road that can be parked, and the parking related to the parking space associated with the road that can be parked. Storage means for storing room data, search means for searching for the road where parking is possible, and a road width formed on the right side of the vehicle when the vehicle is parked on the searched road where parking is possible. A parking support system comprising: a calculation unit; and an output unit that outputs a guidance by comparing the road width calculated by the calculation unit with the parking space.

  According to the first configuration, since the vehicle width data, the width data of the road that can be parked, and the parking space data of the road are stored, the parking space when the vehicle is parked on the searched parking road. It can be determined that the above space is freed. And when space more than parking space can be ensured, it becomes possible to guide a driver on the road which can be parked by outputting the guidance.

According to a second configuration of the present invention, in the first configuration, the storage unit further stores time regulation data related to a parking time regulation associated with a road where parking is possible, and parking is possible that is not in the time zone of the parking time regulation. Search for roads.
By associating the time regulation data with the road that can be parked, it is possible to search for a road that can be parked that is not in the time regulation time zone.

FIG. 1 is a block diagram of a parking assistance system 10 used in an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the parking assistance system. FIG. 3 is a diagram showing an arrangement when the vehicle 110 is parked on a road with room for parking. In FIG. 3, reference numeral 110 denotes a vehicle on which the parking support system 10 is mounted. Reference numeral 120 is an oncoming vehicle, reference numeral 130 is a white line, and reference numeral 140 is a restriction sign indicating parking space. Fig. 4 (1) is a road that can be parked without a restriction sign, (2) is a road in a roadside zone where parking is prohibited, (3) is a road in a pedestrian roadside zone, and (4) is a road without a roadside zone. It is a figure which shows arrangement | positioning when a vehicle is parked. When the vehicle 210 is parked on a road that can be parked without a restriction sign, the necessary space (parking space) on the right side is determined to be 3.5 m.
In FIG. 1, the parking assistance system 10 includes a control unit 11, a navigation unit 20, a search unit 31, a calculation unit 32, an output unit 33, and a storage unit 40.
The control unit 11 includes a CPU 12. Each element constituting the driving support system 10 is connected to the CPU 12 via a bus and is controlled. The CPU 12 controls each element by reading and executing the control program stored in the control program storage area 41 of the storage unit.
The navigation unit 20 includes a navigation system 21, a GPS receiver 22, a beacon receiver 23 and an FM multiplex receiver 24, a display unit 25, an operation unit 26, a speaker unit 27, various sensors (such as a gyro sensor) 28, and the like. The navigation system 21 performs overall control of other elements provided in the navigation unit 20. The GPS receiver 22 receives a signal output from a GPS satellite via a GPS antenna, and supplies the current vehicle position and vehicle direction to the navigation. The display unit 25 is a device that displays the contents of navigation, and a liquid crystal monitor or the like is used. The operation unit 26 is a device for operating navigation. The speaker unit 27 is a device that conveys navigation guidance and warnings by voice.

The search unit 31 searches for a parking lot near the destination and a road where parking is possible. Since the data regarding the parking lot and the road where parking is possible is stored in the map data storage area 42, the search unit 31 searches the parking area and the road where parking is possible from this storage area.
Here, an area to be searched around the destination can be determined in advance. For example, the radius can be within 1.0 km with the destination as the center. Further, when not in the search mode, it is possible to search for a parking area and a road where parking is possible in a predetermined area centering on the current position of the vehicle according to the selection of the menu. Also in this case, for example, the search target can be within a radius of 1.0 km centering on the current position of the vehicle.
When the vehicle is parked on the searched road where parking is possible, the calculation unit 32 calculates the space that can be formed on the right side of the vehicle. The map data storage area 42 stores parkable road width data 423, parking space data 424, and roadside band width data 425, and the vehicle width data storage area 43 stores vehicle width data. . Based on these data, the calculation unit 32 calculates the space that can be created on the right side of the parked vehicle.
The output unit 33 outputs (guides) the fact that, as a result of the calculation by the calculation unit 32, a space larger than the parking space can be secured on the right side of the parked vehicle. The result is output to the display unit 25 and the speaker unit 27.

As the storage unit 40, a general storage medium such as a DVD or CD-ROM, a storage device such as a hard disk, or the like is used. The storage unit 40 includes a control program storage area 41, a map data storage area 42, and a vehicle width data storage area 43.
The control program storage area 41 stores a control program for operating the CPU 12.
The map data storage area 42 stores map data used for navigation. This map data is composed of general map data, and includes, for example, road distance and width, coordinates of intersections and railroad crossings, coordinates of road markings, and the like.
The map data storage area 42 includes road data 422 that can be parked. The road data 422 that can be parked is the position of the road that can be parked, the width data 423 relating to the road, the parking space data 424 necessary on the right side when the vehicle is parked, and the road side width data 425 relating to the width of the road side belt. including. The width data 423 is data related to the width of a road that can be parked. The parking space data 424 is a space required on the right side of the vehicle when the vehicle is parked on a road where parking is possible. If there is no regulation sign on the road where parking is possible, it is necessary to leave a space of 3.5m or more on the right side of the vehicle. Therefore, the parking space data 424 stores data for determining a space of 3.5 m or more. If there is a regulation sign on the road where parking is possible, it is necessary to leave a space of the distance described on the regulation sign. Accordingly, the parking space data 424 stores data for obtaining a space of the distance described in the regulation sign. In this embodiment, parking space data for determining 6 m as parking space is stored. Roadside width data 425 is data relating to the distance from the left end of the road to the center of the roadside white line. The roadside width data 425 is data used when calculating whether or not the vehicle can be parked on a road where parking is possible. The roadside width data 425 is stored in association with a road where parking is possible.
The vehicle width data storage area 43 is an area in which data relating to the vehicle width of the vehicle is stored. The vehicle width data varies depending on the vehicle type. Therefore, vehicle width data is input from the operation unit 26 depending on the vehicle type.

Next, the operation | movement which searches the road in which the vehicle carrying the parking assistance system 10 can park is demonstrated using the flowchart of FIG.
The vehicle that has started traveling searches for a parking place near the destination (steps 1 and 3). When there is a parking lot (step 5: Y), the parking lot is guided (step 7). On the other hand, when there is no parking lot (step 5: N), it progresses to the next step.
When there is no parking lot near the destination, search for a road where parking is possible. When a road that can be parked is searched (step 9: Y), the vehicle width data, the width data of the road, and the parking space data of the road are read from the storage unit 40 (steps 11 to 15). Based on the read data, the calculation unit 32 calculates a space (distance) that can be formed on the right side of the vehicle (step 17). Here, the types of roads that can be parked include roads in roadside zones, roads in roadside prohibition roadside zones, roads in pedestrian-only roadside zones, and roads without roadside zones. Therefore, different arithmetic expressions are used depending on the type of road to be parked and its structure.
The calculation formula when the roadside band width data is known and the roadside band width data is parked on a road in the roadside band exceeding 0.75 m is as follows.
((A + L)-(W + 0.75m + M))> X
It is.
In addition, the following equations are used when parking on roadside roads whose roadside width data is unknown or less than 0.75m, roads that are prohibited from parking, roadside roads for pedestrians, and roads without roadside bands. It is as follows.
(A- (W + M))> X
It is.
Here, A is the width of the road, L is the width of the roadside band, W is the width of the vehicle, X is the parking space, and M is the left margin. The width of the road is the distance from the center of the white line to the center of the other white line. The distance from the left end to the right end). Roadside width is the distance from the left edge of the road to the center of the roadside white line. The left margin can be arbitrarily set according to the skill of the driver, but can be set to 0.3 m, for example.
When the space calculated by the above equation is larger than the parking space data (step 19: Y), the road is guided as a road that can be parked (step 21). On the other hand, when the calculated space is smaller than the parking space (step 19: N), another parking place is searched.

  FIG. 5 shows a block diagram of a parking support system 100 according to another embodiment. FIG. 6 is a flowchart showing the operation of the parking assistance system. FIG. 7 is a diagram showing an arrangement when a vehicle is parked on a road that can be parked and has a time restriction. In FIG. 7, reference numeral 310 denotes a vehicle on which the parking support system 10 is mounted. Reference numeral 320 is an oncoming vehicle, reference numeral 330 is a white line, and reference numeral 340 is a restriction sign indicating parking space. The restriction mark 340 has a time restriction from 8:00 to 20:00.

In FIG. 5, the same elements as those of FIG.
The parking assistance system 100 further includes a timer 60. The timer 60 displays the current time. The time obtained by the timer 60 is compared with the time regulation data and used to determine whether the road is currently parkable.
The storage unit 50 includes time restriction data 526 in road data 522 that can be parked. The time regulation data 526 is data of a time zone when parking is not possible. This time regulation data is a road where parking is possible, and is stored in association with a road with time regulation.

Next, the operation | movement which searches the road in which the vehicle carrying the parking assistance system 100 can park using the flowchart of FIG. 6 is demonstrated. In FIG. 6, steps showing the same operations as those in FIG. 2 are denoted by the same reference numerals, and the description thereof is partially omitted.
When a parking lot is not found near the destination after the start of traveling, a road where parking is possible is searched (step 39). When a road that can be parked can be searched (step 39: Y), time restriction data is read from the storage unit 50 (step 41). Then, the read time regulation data is compared with the current time output from the timer 60, and it is determined whether or not it is a parking time zone (step 43). If it is a time zone in which parking is possible (step 43: Y), the process proceeds to the next step. If it is the regulation time zone, another parking place is searched (step 43: N).
Next, vehicle width data, width data, parking space data, and roadside width data are read from the storage unit 50 (steps 45 to 49). Based on the read data, the calculation unit 32 calculates a space (distance) that can be formed on the right side of the vehicle (step 51). When the calculated space is larger than the parking space (step 53: Y), the road is guided as a road that can be parked (step 55). On the other hand, when the calculated space is smaller than the parking space, another parking place is further searched.

  The present invention is not limited to the description of the embodiments and examples of the invention described above. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims.

FIG. 1 is a block diagram of a parking assistance system 10 used in an embodiment of the present invention. FIG. 2 is a flowchart for explaining the operation of the parking assistance system. FIG. 3 is a diagram showing an arrangement when a vehicle is parked on a road with room for parking. Fig. 4 (1) is a road that can be parked without a restriction sign, (2) is a road in a roadside zone where parking is prohibited, (3) is a road in a pedestrian roadside zone, and (4) is a road without a roadside zone. It is a figure which shows arrangement | positioning when a vehicle is parked. FIG. 5 shows a block diagram of a parking assistance system according to another embodiment. 6 is FIG. 7 FIG. 6 is a flowchart showing the operation of the parking assistance system. FIG. 7 is a diagram showing an arrangement when a vehicle is parked on a road that can be parked and has a time restriction.

Explanation of symbols

10 100 Driving support system, 31 Search unit, 32 Calculation unit, 33 Output unit, 40 Storage unit, 110, 210, 310 Vehicle, 140 340 Regulatory sign

Claims (2)

Vehicle width data on the vehicle width,
Width data about the width of the road associated with the parking available road,
Parking space data relating to parking space associated with the parking available road,
Storage means for storing
Search means for searching for the parkingable road;
Based on the vehicle width data, the width data, and the parking space data, when the vehicle is parked on the searched road that can be parked, calculation means for calculating a road width that can be formed on the right side of the vehicle;
An output means for comparing the road width calculated by the calculation means and the parking space, and outputting a guidance that the road is a road that can be parked when the road width is larger than the parking space ;
A parking support system.   The storage means further stores time restriction data related to a parking time restriction associated with the parkable road, and searches for the road that can be parked that is not in the time zone of the parking time restriction. Item 10. The parking assistance system according to item 1.

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