JP5494130B2 - VEHICLE CHARGE SUPPORT DEVICE, VEHICLE CHARGE SUPPORT METHOD, AND COMPUTER PROGRAM - Google Patents

Description

  The present invention relates to a vehicle charging support apparatus, a vehicle charging support method, and a computer program that support charging of a vehicle battery using a power feeding unit and a power receiving unit.

  In recent years, there are many electric vehicles such as an electric vehicle using a motor driven based on electric power supplied from a battery as a drive source, and a hybrid vehicle using a motor and an engine together as a drive source.

  Further, as one of such vehicle battery charging methods, non-contact power feeding is performed on a power receiving unit disposed on the vehicle by a power feeding unit disposed outside the vehicle (for example, on the road surface of a parking lot). A method for charging the battery by performing the method is known. In the case of this method, in order to charge the battery efficiently, it is important that the power receiving unit and the power feeding unit have an appropriate positional relationship.

  In view of this point, the invention described in Patent Document 1 has been made. The power reception guide device described in Patent Document 1 notifies the charging efficiency of the battery at the current position when parking in the parking area where the power supply device is provided is completed. Thereby, the said charge guidance apparatus can provide the judgment reference | standard of how suitable the present parking position is for charge of a battery.

Japanese Patent Application No. 2009-290389

  Here, when there are obstacles (for example, other parked vehicles, structures, etc.) around the power supply unit, contact with the obstacles may occur during the parking process, and the optimal position for charging the battery Parking is not always possible. Therefore, in order to guide the optimal parking position for charging the battery, it is necessary to consider an obstacle existing around the parking frame. Also, when the vehicle is parked for the purpose of charging the battery, it relates to a state in which the vehicle can be charged most efficiently under the circumstances around the parking frame before the parking operation is completed (for example, at the start of the parking operation). It is desirable to present information (for example, charging efficiency and parking position).

  The present invention has been made in view of the above problems, and is provided with a vehicle charging support device, a vehicle charging support method, and a vehicle charging support device capable of notifying information related to charging at an ideal position in consideration of an obstacle before a parking operation is completed. Provide a computer program.

A charging support device for a vehicle (1) according to claim 1 of the present invention includes a parking frame detecting means (13) for detecting a parking frame in which the host vehicle is parked, and a power receiving unit used for charging the battery of the host vehicle. Power supply unit detecting means (13) that detects the position of the power supply unit disposed in the parking frame, and obstacle detection that detects an obstacle located around the parking frame Means (13), ideal position specifying means (13) for specifying the ideal position of the host vehicle in the parking frame based on the obstacle, the power receiving unit when it is assumed that the vehicle is parked at the ideal position, and on the basis of the offset amount between the power supply unit, to identify the charging efficiency of the battery in the ideal position, to have a charging efficiency notifying means for notifying the charging efficiency of the identified battery (13) And features.

  And the vehicle charging assistance device (1) according to claim 2 is the vehicle charging assistance device according to claim 1, and based on the position of the power supply unit and the position of the power receiving unit in the host vehicle. In the parking frame, when it is assumed that the optimal position specifying means (13) for specifying the optimal position of the own vehicle that maximizes the charging efficiency of the battery and parking at the optimal position, the own vehicle and the obstacle When it is determined that the proximity state determination means (13) for determining whether the distance to the object is less than a predetermined value and the distance between the host vehicle and the obstacle at the optimum position is less than the predetermined value And an avoidance position specifying means (13) for specifying an avoidance position where the distance between the host vehicle and the obstacle in the parking frame is a predetermined value or more, and the ideal position specifying means (13) At the optimum position When the distance between the vehicle and the obstacle is determined to be greater than or equal to a predetermined value, the optimum position is identified as the ideal position, and the distance between the vehicle and the obstacle at the optimum position is less than the predetermined value When it is determined that the avoidance position is determined, the avoidance position is specified as the ideal position.

  Further, the vehicle charging support device (1) according to claim 3 is the vehicle charging support device according to claim 2, and is detected by the parking frame detection means when the avoidance position is specified. It has an avoidance position display means (13) for displaying a parking frame and an external shape of the host vehicle when parked at the avoidance position.

  The vehicle charging support device (1) according to claim 4 is the vehicle charging support device according to claim 2 or claim 3, wherein the proximity state determining means (13) is used to When it is determined that the distance between the vehicle and the obstacle is less than a predetermined value, the parking frame detected by the parking frame detection unit and the external shape of the host vehicle when parked at the optimum position are displayed. And proximity portion notification means (13) for notifying a proximity portion where the distance between the host vehicle and the obstacle is less than a predetermined value.

  The vehicle charging support device (1) according to claim 5 is the vehicle charging support device according to any one of claims 1 to 4, wherein the charging efficiency notification means (13) Charging the battery when it is assumed that the vehicle is parked at the ideal position with respect to the range defined by the numerical value of the battery charging efficiency when the parking is at the ideal position and the minimum charging efficiency and the maximum charging efficiency to the battery. And a graph showing efficiency.

According to a sixth aspect of the present invention, there is provided a charging support method for a vehicle, wherein a parking frame detecting step for detecting a parking frame in which the host vehicle is parked and a power receiving unit used for charging the battery of the host vehicle can be contactlessly fed. Based on the obstacle, a power feeding unit detection step for detecting the position of the power feeding unit disposed in the parking frame, an obstacle detection step for detecting an obstacle located around the parking frame, wherein the ideal position specifying step of specifying the ideal position of the vehicle in the parking space within, on the basis of the offset amount between the receiving unit and the feeding unit when it is assumed that parking in the ideal position, said in the ideal position A charging efficiency notification step of specifying the charging efficiency of the battery and notifying the charging efficiency of the specified battery .

Furthermore, the computer program according to claim 7 is mounted on a computer and is not in contact with a parking frame detection function for detecting a parking frame in which the host vehicle is parked, and a power receiving unit used for charging the battery of the host vehicle. Based on the obstacle, a power feeding unit detecting function capable of feeding power and detecting a position of a power feeding unit disposed in the parking frame, an obstacle detecting function detecting an obstacle located around the parking frame, and the obstacle Based on an ideal position specifying function for specifying the ideal position of the host vehicle in the parking frame, and an offset amount between the power receiving unit and the power feeding unit when it is assumed that the vehicle is parked at the ideal position. And a charging efficiency notification function for specifying the charging efficiency of the battery and notifying the specified charging efficiency of the battery .

The charging support device for a vehicle according to claim 1 specifies an ideal position of the host vehicle in a parking frame based on an obstacle , and determines the charging efficiency of the battery when it is assumed that the vehicle is parked at the ideal position. Can be identified and notified based on the offset amount between the power receiving unit and the power supply unit . Thereby, the said charging device for vehicles can support charge of the battery in a position where charging efficiency is better.

  The charging support device for a vehicle according to claim 2 specifies an optimum position at which the charging efficiency of the battery is maximized as an ideal position when the distance between the host vehicle and the obstacle at the optimum position is equal to or greater than a predetermined value. When the distance between the host vehicle and the obstacle at the position is less than a predetermined value, an avoidance position where the distance between the host vehicle and the obstacle is equal to or greater than the predetermined value is specified as an ideal position. Therefore, the vehicle charging support apparatus can support the charging of the battery at the most efficient position under the situation around the parking frame while avoiding the contact between the host vehicle and the obstacle.

  When the avoidance position is specified, the vehicle charging support apparatus according to the third aspect displays the outline of the host vehicle when the vehicle is parked at the avoidance position before the parking operation is completed. Therefore, the charging support device for a vehicle can support the charging of the battery at the most efficient position under the situation around the parking frame while more reliably avoiding the contact between the host vehicle and the obstacle.

  The charging support device for a vehicle according to claim 4 displays a parking frame and an external shape of the own vehicle when parked at the optimum position when the distance between the own vehicle and the obstacle at the optimum position is less than a predetermined value. And the proximity | contact part where the distance of the own vehicle and the said obstacle becomes less than predetermined value is notified. Thereby, the charging support device for the vehicle can notify a portion where the contact between the host vehicle and the obstacle is highly likely to occur, and more reliably avoiding the contact between the host vehicle and the obstacle, It can assist the charging of the battery under the circumstances around the parking frame.

  The charging support device for a vehicle according to claim 5 is a battery charging efficiency value when it is assumed that the vehicle is parked at the ideal position with respect to a minimum charging efficiency and a maximum charging efficiency. A graph showing charging efficiency is displayed. Therefore, the vehicle charging support device can support the charging of the battery at a position where charging efficiency is better.

The charging support method for a vehicle according to claim 6 specifies the ideal position of the host vehicle in a parking frame based on an obstacle , and determines the charging efficiency of the battery when it is assumed that the vehicle is parked at the ideal position. Can be identified and notified based on the offset amount between the power receiving unit and the power supply unit . Thereby, charging of the battery at a position where charging efficiency is better can be supported.

The computer program according to claim 7 is executed by a computer to identify an ideal position of the host vehicle within the parking frame based on an obstacle and to charge the battery in the case where it is assumed that the vehicle is parked at the ideal position. , And can be specified and notified based on the offset amount between the power receiving unit and the power feeding unit when it is assumed that the vehicle is parked at the ideal position . Thereby, charging of the battery at a position where charging efficiency is better can be supported.

It is the block diagram which showed the navigation apparatus which concerns on this embodiment. It is a flowchart of a charge assistance processing program. It is explanatory drawing which shows the condition at the time of the parking start to a parking frame. It is explanatory drawing which shows an example of a charging efficiency map. It is explanatory drawing which shows an example of the proximity location alerting | reporting screen displayed as a guidance screen. It is explanatory drawing which shows an example of the avoidance position display screen displayed as a guidance screen. It is explanatory drawing which shows an example of the optimal position alerting | reporting screen displayed as a guidance screen. It is explanatory drawing which shows an example of the avoidance position display screen at the time of reverse parking. It is explanatory drawing which shows an example of the avoidance position display screen at the time of forward parking.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a vehicle charging support apparatus and the like according to the present invention will be described in detail with reference to the drawings based on an embodiment embodied in a navigation apparatus. First, a schematic configuration of the navigation device 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a navigation device 1 according to this embodiment.

  As shown in FIG. 1, the navigation apparatus 1 according to the present embodiment is based on a current position detection unit 11 that detects a current position of a vehicle, a data recording unit 12 that records various data, and input information. The navigation ECU 13 that performs various arithmetic processes, the operation unit 14 that receives operations from the user, the liquid crystal display 15 that displays a map and a guide route to the destination, and voice guidance related to route guidance are output to the user. A speaker 16, a DVD drive 17 that reads a DVD that is a storage medium storing a program, and a communication module 18 that communicates with an information center such as a traffic information center.

  In addition, the navigation device 1 includes a camera 51 for detecting a power supply unit 70 and a parking frame 75, which will be described later, an ultrasonic sensor 52 for detecting an obstacle 80 (see FIG. 3), and a drive source of the host vehicle 65. Are connected to a battery 60 for supplying electric power to a motor (not shown) and a power receiving unit 55 for charging the battery 60 by non-contact power supply with a power supply unit 70 described later.

  Below, each component which comprises the navigation apparatus 1 is demonstrated in order. The current position detection unit 11 includes a GPS 21, a vehicle speed sensor 22, a steering sensor 23, a gyro sensor 24, an altimeter (not shown), and the like, and detects a current vehicle position, direction, vehicle traveling speed, and the like. Here, in particular, the vehicle speed sensor 22 is a sensor for detecting a moving distance and a vehicle speed of the vehicle, generates a pulse according to the rotation of the wheel of the vehicle, and outputs a pulse signal to the navigation ECU 13. And navigation ECU13 calculates the rotational speed and moving distance of a wheel by counting the generated pulse. Note that the navigation device 1 does not have to include all of the four types of sensors, and the navigation device 1 may include only one or more of these types of sensors.

  The data recording unit 12 includes an external storage device and a hard disk (not shown) as a recording medium, and a recording head (not shown) that is a driver for reading and writing predetermined data to the hard disk. The hard disk records a map information DB 31, own vehicle outer shape information 32, power receiving unit position information 33, and a charging efficiency map 34.

  Here, the map information DB 31 records various map data necessary for route guidance, traffic information guidance, and map display. Specifically, the map data includes link data relating to road (link) shapes, node data relating to node points, POI data which is information relating to points such as facilities, intersection data relating to each intersection, search data for searching for routes, It is composed of search data for searching points, image drawing data for drawing images such as maps, roads, traffic information and the like on the liquid crystal display 15. The map information DB 31 is updated based on update data distributed from a map distribution center or the like and update data provided via a storage medium (for example, a DVD or a memory card).

  The own vehicle outer shape information 32 indicates the outer shape of the own vehicle 65 on which the navigation device 1 is mounted. The own vehicle outer shape information 32 is referred to when an avoidance position to be described later is specified. The power receiving unit position information 33 is information indicating the arrangement position of the power receiving unit 55 in the host vehicle 65. The power receiving unit position information 33 is referred to when specifying an optimum position and charging efficiency described later. The charging efficiency map 34 shows the relationship between the distance between the power receiving unit 55 and the power feeding unit 70 (hereinafter referred to as offset amount) and the charging efficiency of the battery 60 (see FIG. 4). The charging efficiency map 34 is referred to when specifying charging efficiency to be described later. The details of the charging efficiency map 34 will be described later.

  On the other hand, the navigation ECU (Electronic Control Unit) 13 is a guide route setting process for setting a guide route from the current position to the destination when the destination is selected, and a charging support process described later (see FIG. 2). This is an electronic control unit that controls the entire navigation device 1. The navigation ECU 13 is a CPU 41 as an arithmetic device and a control device, and a RAM 42 that is used as a working memory when the CPU 41 performs various arithmetic processes, and stores route data when a route is searched, In addition to the control program, an internal storage device such as a ROM 43 in which a charge support processing program (see FIG. 2) to be described later is recorded and a program read from the ROM 43 is stored.

  The operation unit 14 is operated when inputting a departure point as a travel start point and a destination as a travel end point, and includes a plurality of operation switches (not shown) such as various keys and buttons. The operation unit 14 is used when performing input to an avoidance position display button 97 (see FIG. 5) described later. Then, the navigation ECU 13 performs control to execute various corresponding operations based on switch signals output by pressing the switches. In addition, it can also be comprised by the touchscreen provided in the front surface of the liquid crystal display 15.

  The liquid crystal display 15 includes a map image including a road, traffic information, operation guidance, operation menu, key guidance, guidance route from the departure point to the destination, guidance information along the guidance route, news, weather forecast, time, Mail, TV programs, etc. are displayed. The liquid crystal display 15 displays a charging position notification screen (see FIGS. 5 to 7), which will be described later, based on the charging support processing program (see FIG. 2).

  The speaker 16 outputs voice guidance for guiding traveling along the guidance route based on an instruction from the navigation ECU 13 and guidance voice for traffic information.

  The DVD drive 17 is a drive that can read data recorded on a recording medium such as a DVD or a CD. Then, the map information DB 31 is updated based on the read data.

  The communication module 18 receives traffic information including traffic information, regulation information, traffic accident information, and the like transmitted from a traffic information center such as a VICS (registered trademark: Vehicle Information and Communication System) center or a probe center. For example, a mobile phone or a DCM corresponds to the communication device.

  The camera 51 uses a solid-state image sensor such as a CCD, for example, and is attached near the upper center of the license plate mounted on the rear side of the host vehicle 65, and is installed with the line-of-sight direction downward from the horizontal by a predetermined angle. The The camera 51 captures the rear of the host vehicle 65 when parking in a parking lot or the like, and detects the parking frame 75 formed on the road surface of the parking lot and the power supply unit 70 disposed in the parking frame 75. Used when

  The ultrasonic sensor 52 detects the presence / absence of the object and the distance to the object by transmitting ultrasonic waves toward the object and receiving the reflected wave reflected by the object. The ultrasonic sensors 52 are disposed at the four corners of the host vehicle 65 and transmit ultrasonic waves in the outward direction of the host vehicle 65 (see FIG. 3). The ultrasonic sensor 52 is used when detecting an obstacle 80 around the parking frame 75 when parking in a parking lot or the like.

  The power reception unit 55 is disposed at a predetermined position on the bottom surface of the host vehicle 65 and performs non-contact power supply with a power supply unit 70 (see FIG. 3) embedded in the parking frame 75. The power receiving unit 55 has a charging unit (not shown), and charges the battery 60 with the power received from the power supply unit 70 via the charging unit.

  The battery 60 is a secondary battery that can be repeatedly charged and discharged, and a lead storage battery, a nickel cadmium battery, a nickel hydrogen battery, a lithium ion battery, a sodium sulfur battery, or the like is used. The battery 60 supplies power to a motor (not shown) that is a drive source of the host vehicle 65. Further, the battery 60 stores electric power supplied by non-contact power feeding between the power receiving unit 55 and the power feeding unit 70.

  Next, the charging support processing program executed in the navigation device 1 will be described in detail with reference to FIG. The charging support processing program is the most efficient battery in consideration of the surrounding environment of the parking frame 75 (for example, the presence or absence of the obstacle 80) when parking in the parking frame 75 in which the power supply unit 70 is embedded. This is a program for notifying an ideal position (optimal position and avoidance position to be described later) where 60 charging can be performed and charging efficiency at the ideal position. FIG. 2 is a flowchart of the charging support processing program according to the present embodiment.

  The charging support processing program is executed by the CPU 41 when the host vehicle 65 enters the parking lot and starts parking. Whether or not the host vehicle 65 has entered the parking lot is determined based on the current position information of the host vehicle 65 based on the current position detection unit 11 and the map information stored in the map information DB 31. Can be determined by executing a map matching process that specifies the map on the map.

  In the following description, as shown in FIG. 3, the host vehicle 65 enters a parking lot in which a parking frame 75 is drawn on the road surface and the power supply unit 70 is embedded in the ground in the parking frame 75. It is assumed that parking in the desired parking frame 75 is started by reverse parking. In the parking lot, it is assumed that a power supply unit position indicator 70 </ b> A indicating the burying position of the power supply unit 70 is drawn on the ground in the parking frame 75.

  Here, the power feeding unit 70 performs non-contact power feeding with the power receiving unit 55 as described above. Here, as a specific method of non-contact power feeding, there is a method using mutual induction generated between two coils. In this method, a magnetic field change is generated by applying a high-frequency current to the primary coil on the power supply unit 70 side, and an induced current is generated on the secondary coil on the power receiving unit 55 side. Thereby, non-contact power feeding from the power feeding unit 70 to the power receiving unit 55 is realized.

  As shown in FIG. 2, in the charging support processing program, first, in S <b> 1, the CPU 41 detects the position of the obstacle 80 around the parking frame 75 where the host vehicle 65 is parked by the ultrasonic sensor 52, and The shape of the obstacle 80 is detected. For example, in the case shown in FIG. 3, the CPU 41 controls the ultrasonic sensor 52 to transmit an ultrasonic wave, and reflects the reflected wave reflected by the vehicle parked in the adjacent parking frame 75 and the parking lot pillar. Based on the vehicle 65, the position and shape of the obstacle 80 (the vehicle and the pillar) are detected. As described above, since the coordinate information of the current position of the host vehicle 65 is specified by the current position detection unit 11, the CPU 41 can acquire coordinate information indicating the position of the obstacle 80. In the following description, information indicating the position coordinates and shape of the detected obstacle 80 is referred to as “obstacle information”.

  In S <b> 2, the CPU 41 detects the position and shape of the parking frame 75 where the host vehicle 65 intends to park by performing image recognition processing on the image captured by the camera 51. Specifically, as described above, the camera 51 is attached so that the optical axis is directed in a direction at a predetermined angle from the horizontal so that the rear of the host vehicle 65 can be imaged from the vicinity of the rear bumper, and the imaging range is fixed. (See FIG. 3). Accordingly, the CPU 41 determines the parking frame 75 based on the host vehicle 65 based on information such as the position and shape of the parking frame 75 in the captured image of the camera 51 and the mounting position and angle of the camera 51 in the host vehicle 65. Detect position and shape. And CPU41 acquires the coordinate information which shows the position and shape of the parking frame 75 using the coordinate information of the present position of the own vehicle 65. FIG. In the following description, coordinate information indicating the position and shape of the parking frame 75 is referred to as “parking frame information”.

  In S <b> 3, the CPU 41 detects the position of the power supply unit 70 embedded in the parking frame 75 by performing image recognition processing on the image captured by the camera 51. In the present embodiment, the power supply unit 70 is embedded in the ground of the parking frame 75, but the power supply unit position mark 70A is drawn at the embedded position of the power supply unit 70 (see FIG. 3). Therefore, the CPU 41 can perform image recognition processing on the captured image of the camera 51 and detect the position of the power supply unit position indicator 70A in the captured image. Then, the CPU 41 determines the power supply unit based on the own vehicle 65 based on the position and shape of the power supply unit position mark 70A in the captured image of the camera 51 and information such as the mounting position and angle of the camera 51 in the own vehicle 65. The position of 70 is detected. And CPU41 acquires the coordinate information which shows the position of the electric power feeding unit 70 using the coordinate information of the present position of the own vehicle 65. FIG. In the following description, coordinate information indicating the position of the power supply unit 70 is referred to as “power supply unit position information”.

In S <b> 4, the CPU 41 specifies the optimum position based on the power feeding unit position information, the own vehicle outer shape information 32, and the power receiving unit position information 33. Here, the optimum position means a parking position in which the charging efficiency of the battery 60 by non-contact power feeding between the power receiving unit 55 and the power feeding unit 70 is the best.
In this embodiment, the battery 60 is charged by generating a magnetic field change by applying a high-frequency current to the primary coil on the power supply unit 70 side and generating an induced current on the secondary coil on the power receiving unit 55 side. . Therefore, the charging efficiency of the battery 60 is the highest when the central axis of the primary coil on the power supply unit 70 side coincides with the central axis of the secondary coil on the power receiving unit 55 side (see FIG. 4). That is, the CPU 41 determines the parking position of the host vehicle 65 when the power receiving unit 55 is located at a position that matches the coordinates indicated by the power feeding unit position information based on the host vehicle outer shape information 32 and the power receiving unit position information 33. (See FIGS. 5 and 7).

  In S5, when it is assumed that the host vehicle 65 is parked at the optimal position specified in S4, the CPU 41 determines whether or not the distance between the host vehicle 65 and the obstacle 80 is less than a predetermined value (for example, 10 cm). Judging. Specifically, the CPU 41 calculates the distance between the host vehicle 65 and the obstacle 80 at the optimum position based on the obstacle information detected at S1, the optimum position identified at S4, and the own vehicle outer shape information 32. Then, the CPU 41 specifies a location where the distance between the host vehicle 65 and the obstacle 80 at the optimal position is less than a predetermined value (hereinafter referred to as a proximity location), and performs the determination of S5. If there is even one of the proximate locations (S5: YES), the CPU 41 proceeds to S6. On the other hand, when the said proximity location does not exist (S5: NO), CPU41 specifies an optimal position as an ideal position, and transfers a process to S10.

  In S <b> 6, the CPU 41 calculates an avoidance position based on the own vehicle outer shape information 32 and the obstacle information. The avoidance position means a parking position where the distance between the power reception unit 55 and the power supply unit 70 is the shortest under the condition that there is no proximity between the host vehicle 65 and the obstacle 80. Specifically, the CPU 41 translates / rotates the host vehicle 65 based on the host vehicle outer shape information 32, the power feeding unit position information, and the obstacle information, so that the nearest position is reached at the shortest moving distance from the optimum position. A position where the problem can be resolved is specified. When calculating the avoidance position, when the host vehicle 65 is rotated, the CPU 41 limits the range in which the host vehicle 65 does not protrude outside the parking frame 75 based on the parking frame information. After specifying the avoidance position, the CPU 41 proceeds to S7.

  In S <b> 7, the CPU 41 determines whether or not the entire vehicle 65 when parked in the avoidance position is located in the parking frame 75 based on the avoidance position specified in S <b> 6, the parking frame information, and the own vehicle outer shape information 32. Judging. When located in the parking frame 75 (S7: YES), CPU41 specifies the said avoidance position as an ideal position, and transfers a process to S8. On the other hand, when the host vehicle 65 protrudes from the parking frame 75 when parked at the avoidance position (S7: NO), the CPU 41 proceeds to S10.

  In S8, the CPU 41 calculates an offset amount based on the avoidance position specified in S6, the power receiving unit position information 33, and the power feeding unit position information. The offset amount means a horizontal distance from the power feeding unit 70 to the power receiving unit 55 when parked at the avoidance position. After calculating the offset amount, the CPU 41 proceeds to S9.

  In S9, the CPU 41 specifies the charging efficiency of the battery 60 at the avoidance position based on the offset amount calculated in S8 and the charging efficiency map 34. Here, as shown in FIG. 4, the charging efficiency map 34 defines the relationship between the offset amount and the charging efficiency of the battery 60. In the present embodiment, the battery 60 is charged by mutual induction generated between the coil on the power receiving unit 55 side and the coil on the power supply unit 70 side. Therefore, the charging efficiency of the battery 60 shows the highest value when the offset amount is “0”, and shows a smaller value as the value of the offset amount increases. Therefore, the CPU 41 specifies the charging efficiency of the battery 60 corresponding to the offset amount calculated in S8 based on the charging efficiency map 34 (see FIG. 4). The offset amount indicates the offset amount when the host vehicle 65 is positioned at the avoidance position, and the charging efficiency specified in this case indicates the charging efficiency of the battery 60 at the avoidance position. After specifying the charging efficiency of the battery 60 in the avoidance position, the CPU 41 proceeds to S10.

  In S10, CPU41 displays the guidance screen regarding charge of the battery 60 on the liquid crystal display 15 based on the processing result of S1-S9. After displaying the guidance screen (see FIGS. 5 to 7) on the liquid crystal display 15, the CPU 41 ends the charging support processing program.

  Next, the guidance screen displayed on the liquid crystal display 15 in S10 will be described in detail with reference to the drawings. As shown in FIG. 5 and the like, the guidance screen includes a message display unit 90, a charging efficiency display unit 91, a charging efficiency graph 92, and a parking position display unit 93. The message display unit 90 displays a message regarding the display content of the current guidance screen. The charging efficiency display unit 91 displays the numerical value of the charging efficiency of the battery 60 specified based on the distance between the power receiving unit 55 and the power feeding unit 70. The charging efficiency graph 92 is a range between the maximum charging efficiency (90% in the present embodiment) and the minimum charging efficiency (10% in the present embodiment) determined by the configuration of the power receiving unit 55 and the power feeding unit 70. The charging efficiency at the ideal position is shown by a bar graph.

  Based on the processing results of S1 to S9, the parking position display unit 93 includes the power supply unit 70, the parking frame 75, the obstacle 80, the host vehicle 65 when parked at an ideal position (that is, the optimal position or the avoidance position), and The positional relationship with the power receiving unit 55 is displayed as an image. The parking position display unit 93 includes a power reception unit image 94, a power supply unit image 95, a parking position image 96A, a parking frame image 96B, and an obstacle image 96C.

  The power receiving unit image 94 is displayed on the parking position display section 93 based on the optimum position calculated in S4 or the avoidance position calculated in S6 and the power receiving unit position information 33, and the host vehicle 65 is parked at the ideal position. The position of the power receiving unit 55 in this case is shown. The power supply unit image 95 is displayed on the parking position display section 93 based on the power supply unit position information detected in S <b> 3 and indicates the position of the power supply unit 70 in the parking frame 75. The parking position image 96A is displayed on the parking position display section 93 based on the optimum position calculated in S4 or the avoidance position calculated in S6 and the own vehicle outer shape information 32, and the host vehicle when parked at the ideal position. 65 positions are indicated. The parking frame image 96B is displayed on the parking position display unit 93 based on the parking frame information detected in S1, and indicates the position of the parking frame 75. The obstacle image 96 </ b> C is displayed on the parking position display unit 93 based on the obstacle information detected in S <b> 2 and shows the position and shape of the obstacle 80 around the parking frame 75.

  Here, in the charging support processing program, “when there is no proximity location between the vehicle 65 and the obstacle 80 at the optimal position (S5: NO)”, “the proximity location exists at the optimal location, and the avoidance location. Can be identified within the parking frame 75 (S9), "" when a proximity location exists at the optimal position and the vehicle protrudes from the parking frame 75 at the avoidance position (S7: NO) ", the process proceeds to S10. Therefore, the guidance screen in S10 shows different contents in the above cases.

  First, referring to FIG. 5 and FIG. 6 for the content of the guidance screen displayed on the liquid crystal display 15 when “a close location exists at the optimal position and the avoidance position can be specified in the parking frame 75 (S9)”. I will explain. FIG. 5 is an explanatory diagram illustrating an example of a proximity location notification screen displayed as a guidance screen. FIG. 6 is an explanatory diagram illustrating an example of an avoidance position display screen displayed as a guidance screen.

When the process shifts from S9 to S10, since the distance between the host vehicle 65 parked at the optimum position and the obstacle 80 is determined to be less than the predetermined value, the CPU 41 first uses the proximity location notification screen (see FIG. 5) as a guidance screen. And displayed on the liquid crystal display 15.
On the proximity location notification screen, the CPU 41 displays a message indicating that a proximity location exists (for example, “There is a contact / proximity location!”) On the message display unit 90. In this case, since it is assumed that the host vehicle 65 is parked at the optimal position, the CPU 41 indicates the charging efficiency (for example, 90% which is the maximum charging efficiency) of the battery 60 at the optimal position. 91 and the charging efficiency graph 92. Further, the CPU 41 displays the power receiving unit image 94 and the parking position image 96 </ b> A on the parking position display unit 93 based on the optimal position calculated in S <b> 4, the own vehicle outer shape information 32 and the power receiving unit position information 33.

  As shown in FIG. 5, the proximity location display screen has an avoidance position display button 97 and a proximity location mark 98. The avoidance position display button 97 is input by operating the operation unit 14 when switching the display content of the liquid crystal display 15 from the proximity location display screen (see FIG. 5) to the avoidance position display screen (see FIG. 6). The proximity location mark 98 is displayed on the parking position display section 93 based on the location of the proximity location identified in S5, and indicates a location where the distance between the host vehicle 65 and the obstacle 80 at the optimal position is less than a predetermined value.

  Therefore, the user can grasp the charging efficiency of the battery 60 at the optimum position by visually recognizing the proximity location notification screen (see FIG. 5). Further, since the proximity location mark 98 is displayed at the proximity location specified in S5 on the proximity location notification screen, the user may contact the vehicle 65 with the obstacle 80 when parking at the optimal position. Therefore, it can be understood that it is difficult to charge the battery 60 at the optimum position.

  Here, when the avoidance position display button 97 is input while the proximity location notification screen (see FIG. 5) is displayed, the CPU 41 displays the avoidance position display screen (see FIG. 6) on the liquid crystal display 15. When displaying the avoidance position display screen, the CPU 41 displays a message “notifying that the avoidance position is being displayed” on the message display unit 90. Further, the CPU 41 displays the charging efficiency (for example, 70%) of the battery 60 at the avoidance position on the charging efficiency display unit 91 and the charging efficiency graph 92 based on the processing result of S9. Further, the CPU 41 displays the power receiving unit image 94 and the parking position image 96A on the parking position display section 93 based on the avoidance position calculated in S6, the own vehicle outer shape information 32, and the power receiving unit position information 33 (FIG. 6). reference).

  Therefore, the user can grasp the charging efficiency of the battery 60 at the avoidance position by visually recognizing the avoidance position display screen (see FIG. 6). Further, since the avoidance position specified in S6 is displayed on the avoidance position display screen, the user is most efficient in charging the battery 60 under the condition of avoiding contact / proximity between the obstacle 80 and the host vehicle 65. A good parking position can be identified.

  Next, referring to FIG. 7, the content of the guidance screen displayed on the liquid crystal display 15 when “a proximity location does not exist between the host vehicle 65 and the obstacle 80 at the optimum position (S5: NO)” will be described. explain. FIG. 7 is an explanatory diagram illustrating an example of an optimum position display screen displayed as a guidance screen.

  After shifting from S5 to S10, the CPU 41 displays an optimum position display screen on the liquid crystal display 15. In the optimum position display screen (see FIG. 7), the CPU 41 displays a message “Indicating that the optimum position is displayed” on the message display unit 90. Further, the CPU 41 displays the charging efficiency of the battery 60 at the optimum position (for example, 90% which is the maximum charging efficiency) on the charging efficiency display unit 91 and the charging efficiency graph 92. Further, the CPU 41 displays the power receiving unit image 94 and the parking position image 96 </ b> A on the parking position display unit 93 based on the optimal position calculated in S <b> 4, the own vehicle outer shape information 32 and the power receiving unit position information 33.

  Therefore, the user can grasp the charging efficiency of the battery 60 at the optimum position by visually recognizing the optimum position display screen (see FIG. 7). Moreover, since the optimal position specified by S4 is displayed on the optimal position display screen, the user can specify the parking position with the best charging efficiency of the battery 60. Further, since the positional relationship between the parking position image 96A and the obstacle image 96C is displayed in the parking position display section 93, the user can contact the vehicle 65 with the obstacle 80 when parking at the optimum position. It can be understood that the battery 60 can be charged at the optimum position.

  Next, the content of the guidance screen displayed on the liquid crystal display 15 when “a close location exists at the optimum position and the vehicle avoids the parking frame 75 at the avoidance position (S7: NO)” will be described. In this case, the CPU 41 displays an error screen on the liquid crystal display 15. On the error screen (not shown), the CPU 41 displays a message that “a proximity point occurs between the obstacle 80 at the optimum position” and “the host vehicle 65 protrudes from the parking frame 75 at the avoidance position”. Displayed on the message display unit 90. At this time, in the parking position display unit 93, the “display mode of the parking position display unit 93 on the proximity location notification screen (see FIG. 5)” or “how to protrude from the parking frame 75 when parked at the avoidance position”. You may comprise so that "the display mode which shows" may be displayed. Thereby, the user can grasp that the own vehicle 65 is likely to come into contact with the obstacle 80 when parking at the optimum position, and parking and charging in the parking frame 75 are difficult.

  As described above, in the navigation device 1 according to the present embodiment, the vehicle charging support method by the navigation device 1, and the computer program executed by the navigation device 1 (hereinafter referred to as the navigation device 1 or the like), the ultrasonic sensor 52 is used. The obstacle 80 is detected (S1), and the ideal position (that is, the optimum position or the avoidance position) at which the battery 60 can be charged most efficiently in the parking frame 75 in consideration of the position and shape of the obstacle 80 is determined. Identified. And in the said navigation apparatus 1 grade | etc., By displaying a guidance screen (refer FIGS. 5-7) on the liquid crystal display 15, the charging efficiency of the battery 60 in an ideal position can be alert | reported to a user (S10). Therefore, the navigation device 1 or the like can support charging of the battery 60 at a position with better charging efficiency.

  In the navigation device 1 or the like, if it is assumed that the host vehicle 65 is parked at the optimum position and there is no location close to the obstacle 80 (S5: NO), the optimum battery charging efficiency is maximized. The position is specified as the ideal position, and notification is performed on the guidance screen (see FIG. 7). Therefore, the user can grasp the position where the battery 60 can be charged without contacting the obstacle 80. And in the said navigation apparatus 1 grade | etc., When the proximity | contact location with the obstruction 80 exists, the position and shape of the obstruction 80 are considered and contact with the obstruction 80 is avoided and charging efficiency is the most. A good avoidance position is specified (S6, S7), and a notification is provided on the guidance screen (see FIG. 6). Therefore, the user can grasp the position where the charging efficiency of the battery 60 is the best under the circumstances around the parking frame 75 while avoiding the contact between the host vehicle 65 and the obstacle 80.

  In addition, since the parking position image 96A indicating the parking position at the avoidance position and the parking frame image 96B are displayed on the parking position display unit 93 before the parking operation is completed, the user can display the vehicle 65 and the obstacle 80. The position where the charging efficiency of the battery 60 is the best can be grasped more clearly under the circumstances around the parking frame 75 while avoiding contact with the vehicle.

  In the navigation device 1 or the like, the distance between the parking position image 96A and the obstacle image 96C when the proximity position mark 98 is assumed to be parked at the optimal position on the proximity position notification screen (see FIG. 5) is a predetermined value. It is displayed in the proximity location that is less than. Therefore, since the user can grasp the position of the adjacent portion, the contact between the host vehicle 65 and the obstacle 80 can be avoided more reliably.

  Further, in the navigation device 1 or the like, the charging efficiency display unit 91 and the charging efficiency graph 92 notify the charging efficiency of the battery 60 when parked at the ideal position (that is, the optimal position or the avoidance position). Therefore, the user can charge the battery 60 at a position with better charging efficiency based on the display of the charging efficiency display unit 91 and the charging efficiency graph 92.

  Although the present invention has been described based on the embodiments, the present invention is not limited to the above-described embodiments, and various improvements and modifications can be made without departing from the spirit of the present invention. For example, in this embodiment, although the case where reverse parking was performed was demonstrated, it is not limited to this aspect. That is, the case where forward parking is performed may be considered.

  More specifically, a parking direction switching button 99 is provided on the avoidance position display screen, and in accordance with the input of the parking direction switching button 99, in addition to the case where the vehicle is parked at the avoidance position by reverse parking (see FIGS. 6 and 8), forward It is also possible to display the charging efficiency of the battery 60, the parking position of the host vehicle 65, and the position of the power receiving unit 55 when parking at the avoidance position by parking. That is, based on the avoidance position specified in S6 and the own vehicle outer shape information 32, the host vehicle that has been parked backward at the avoidance position is rotated by 180 degrees, so The position of the vehicle can be specified. And based on the own vehicle external shape information 32 of the own vehicle parked at the avoidance position by forward parking and the power receiving unit position information 33, the position of the power receiving unit 55 when parked at the avoidance position by forward parking can be specified. Furthermore, since the offset amount when the vehicle is parked forward to the avoidance position can be calculated based on the position of the power receiving unit 55 in this case and the power supply unit information detected in S3, the charging efficiency of the battery 60 in this case can be calculated. It can be specified. As a result, as shown in FIG. 9, it is possible to display the charging efficiency of the battery 60, the parking position of the host vehicle 65, and the position of the power receiving unit 55 when the vehicle is parked at the avoidance position by forward parking. With this configuration, the user can select forward parking and backward parking when parking the avoidance position, and can select a parking direction in which the battery 60 is charged efficiently.

  In the present embodiment, the camera 51 is disposed only behind the host vehicle 65. However, the camera 51 may be disposed forward, or may be disposed forward and backward. good. And in this embodiment, although the position of the electric power feeding unit 70 was pinpointed by performing image recognition processing with respect to the captured image by the camera 51, it is not limited to this aspect. For example, the position of the power supply unit 70 relative to the host vehicle 65 may be specified by communicating with the power supply unit 70 itself, a management center of a parking lot where the power supply unit 70 is disposed, or the like.

  In the present embodiment, the ultrasonic sensor 52 is used to detect the position and shape of the obstacle 80 around the parking frame 75. However, the present invention is not limited to this mode. For example, the position and shape of the obstacle 80 may be detected using a laser range finder or a millimeter wave radar.

  In the present embodiment, the charging efficiency of the battery 60 is specified based on the charging efficiency map 34 shown in FIG. 4 and the offset amount. However, the present invention is not limited to this mode. A magnetic field sensor may be connected to the navigation device 1 and the charging efficiency may be specified based on the magnetic field strength, or a table indicating the relationship between the offset amount and the charging efficiency may be used. Moreover, the aspect which added the concept of height to the charging efficiency map 34 may be sufficient, and when charging efficiency changes according to the angle of the electric power feeding unit 70 and the receiving unit 55, an angle should also be considered. You may comprise. Further, if the power supply unit 70 is configured to communicate arrangement position information indicating the arrangement position of the power supply unit 70, the arrangement position information is acquired from the power supply unit 70 and the offset amount is calculated. Thus, the charging efficiency of the battery 60 may be specified.

  Furthermore, in the present embodiment, the proximity location notification screen (see FIG. 5) and the avoidance position display screen (see FIG. 6) are switched based on the input of the avoidance position display button 97, but at predetermined time intervals. It may be configured to switch at

1 Navigation device 13 Navigation ECU
34 Charging efficiency map 41 CPU
42 RAM
43 ROM
55 Power receiving unit 60 Battery 70 Power feeding unit 75 Parking frame 80 Obstacle

Claims (7)

Parking frame detection means for detecting a parking frame in which the host vehicle is parked;
Non-contact power feeding is possible with respect to the power receiving unit used for charging the battery of the host vehicle, and a power feeding unit detecting means for detecting the position of the power feeding unit disposed in the parking frame,
Obstacle detection means for detecting obstacles located around the parking frame;
An ideal position specifying means for specifying an ideal position of the host vehicle in the parking frame based on the obstacle;
A charging efficiency notification for specifying the charging efficiency of the battery at the ideal position and notifying the charging efficiency of the specified battery based on the offset amount between the power receiving unit and the power feeding unit when it is assumed that the vehicle is parked at the ideal position Means,
A charging support device for a vehicle, comprising: The vehicle charging support device according to claim 1,
Based on the position of the power supply unit and the position of the power receiving unit in the host vehicle, an optimal position specifying unit that specifies the optimal position of the host vehicle in which the charging efficiency of the battery is maximized in the parking frame;
When it is assumed that the vehicle is parked at the optimum position, proximity state determination means for determining whether the distance between the host vehicle and the obstacle is less than a predetermined value;
When it is determined that the distance between the host vehicle and the obstacle at the optimum position is less than a predetermined value, an avoidance position where the distance between the host vehicle and the obstacle within the parking frame is a predetermined value or more. And an avoidance position specifying means for specifying,
The ideal position specifying means includes
If it is determined that the distance between the host vehicle and the obstacle at the optimum position is a predetermined value or more, the optimum position is specified as the ideal position;
The vehicle charging support device, wherein when the distance between the host vehicle and the obstacle at the optimum position is determined to be less than a predetermined value, the avoidance position is specified as the ideal position. The vehicle charging support device according to claim 2,
When the avoidance position is specified, the avoidance position display means for displaying the parking frame detected by the parking frame detection means and the outer shape of the host vehicle when parked at the avoidance position;
A charging support device for a vehicle, comprising: A charging support device for a vehicle according to claim 2 or claim 3,
When the proximity state determination means determines that the distance between the host vehicle and the obstacle at the optimal position is less than a predetermined value, the parking frame detected by the parking frame detection means and the optimal position Proximity part notification means for displaying the external shape of the host vehicle when parked, and notifying a proximity part where the distance between the host vehicle and the obstacle is less than a predetermined value;
A charging support device for a vehicle, comprising: A vehicle charging support device according to any one of claims 1 to 4,
The charging efficiency notification means includes
The value of the charging efficiency of the battery when it is assumed to park at the ideal position,
A graph showing the charging efficiency of the battery when it is assumed that the vehicle is parked at the ideal position with respect to the range defined by the minimum charging efficiency and the maximum charging efficiency to the battery
Is displayed, the vehicle charging support device. A parking frame detection step for detecting a parking frame in which the host vehicle is parked;
A power feeding unit detection step capable of contactless power feeding to a power receiving unit used for charging the battery of the host vehicle, and detecting a position of the power feeding unit disposed in the parking frame;
An obstacle detection step for detecting obstacles located around the parking frame;
An ideal position specifying step of specifying an ideal position of the host vehicle in the parking frame based on the obstacle;
A charging efficiency notification for specifying the charging efficiency of the battery at the ideal position and notifying the charging efficiency of the specified battery based on the offset amount between the power receiving unit and the power feeding unit when it is assumed that the vehicle is parked at the ideal position Steps,
A charging support method for a vehicle, comprising: On the computer,
A parking frame detection function for detecting a parking frame in which the host vehicle is parked;
A power feeding unit detection function capable of contactless power feeding to a power receiving unit used for charging the battery of the host vehicle, and detecting a position of the power feeding unit disposed in the parking frame;
An obstacle detection function for detecting obstacles located around the parking frame;
Based on the obstacle, an ideal position specifying function for specifying the ideal position of the host vehicle in the parking frame;
A charging efficiency notification for specifying the charging efficiency of the battery at the ideal position and notifying the charging efficiency of the specified battery based on the offset amount between the power receiving unit and the power feeding unit when it is assumed that the vehicle is parked at the ideal position Function and
A computer program for executing

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