JP2014233150A - Non-contact charge system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a non-contact charge system for making it possible to easily park a vehicle so as to make a power reception coil and a power supply coil have positional relation where the coils are opposite to each other while having a predetermined air gap.SOLUTION: A non-contact charge system 1 comprises: a charge spot 2 in which a power supply device 4 is provided; and a vehicle 3 in which a charger 5 is provided. The power supply device 4 includes a power supply coil 6 and a sonar 7. The charger 5 includes a power reception coil 8. The sonar 7 is provided at a position corresponding to the rear side of the vehicle 3, from the power supply coil 6. The power reception coil 8 is provided so as to protrude from a bottom face part 10 of the vehicle 3. A protrusion 11 in an approximately cylindrical shape is provided so as to protrude from the bottom face part 10 of the vehicle 3. The power supply coil 6 and power reception coil 8 are provided so that the coils are opposite to each other while having a predetermined air gap when parking the vehicle 3 at a parking position where the protrusion 11 of the vehicle 3 faces the sonar 7 of the charge spot 2 with the closest distance.

Description

  The present invention relates to a contactless charging system, and more particularly, to a contactless charging system that includes a power feeding coil and a power receiving coil, and that transmits and receives power between the power feeding coil and the power receiving coil.

  A conventional non-contact charging system is described in Patent Document 1. In this non-contact charging system, electric power is transferred between the vehicle and the charging spot by causing a charging device mounted on the vehicle and a power supply device provided at the charging spot to face each other. In order to align the charging device with the power feeding device, the charging device and the power feeding device each include a transmitter including a device that emits an electromagnetic wave such as an LED (Light Emitting Diode) in the left and right directions, and a PD (Photo Diode). ) Etc. are provided with a plurality of devices for receiving electromagnetic waves. It is possible to detect the relative positional relationship between the charging device and the power feeding device by deriving the ratio of the distance between the transmitting unit and the receiving unit based on the intensity of electromagnetic waves such as light received by the receiving unit. Yes.

JP 2007-159359 A

  However, in the non-contact charging system described in Patent Document 1, since the relative positional relationship can be detected only in the positional relationship between the transmitting unit and the receiving unit, it is difficult to align the vehicle when it is parked. There was a problem.

  The present invention has been made to solve such problems, and can easily park a vehicle so that the power receiving coil and the power feeding coil have a predetermined air gap and face each other. An object is to provide a non-contact charging system.

A contactless charging system according to the present invention is a contactless charging system including a charging device mounted on a vehicle and a power feeding device provided in a charging spot, the charging device including a power receiving coil, Is provided with a feeding coil and a sonar, the vehicle is provided with a step that protrudes or is recessed with respect to the bottom surface portion thereof, and the power receiving coil is provided with a protrusion or indentation with respect to the bottom surface portion. After detecting that the receiving coil is located directly above the sonar by transmitting a sound wave from the sonar and detecting the distance between the sonar, the receiving coil and the step when the battery enters the charging spot. When a step is detected right above the sonar and the step is positioned right above the sonar, the power receiving coil and the power feeding coil face each other with a predetermined air gap.
A contactless charging system according to the present invention is a contactless charging system including a charging device mounted on a vehicle and a power feeding device provided at a charging spot, and the charging device includes a power receiving coil and a sonar. The power feeding device includes a power feeding coil, the charging spot includes a step protruding or recessed with respect to the floor surface, and the power feeding coil is provided with protruding or recessed with respect to the floor surface. When entering the charging spot, a sound wave is emitted from the sonar, and the distance between the sonar, the feeding coil and the step is detected to detect that the feeding coil is located directly below the sonar. When a step is located immediately below the sonar, and the step is located directly below the sonar, the power receiving coil and the power feeding coil face each other with a predetermined air gap.

A contactless charging system according to the present invention is a contactless charging system including a charging device mounted on a vehicle and a power feeding device provided at a charging spot, the charging device including a power receiving coil, A power supply coil and a sonar are provided, and the vehicle has a step protruding or recessed with respect to the bottom surface thereof, and when the vehicle enters the charging spot, a sound wave is transmitted from the sonar and the distance between the sonar and the step. Detecting that the step is located directly above the sonar, and when the step is located directly above the sonar, the receiving coil and the feeding coil have a predetermined air gap. While facing each other.
A contactless charging system according to the present invention is a contactless charging system including a charging device mounted on a vehicle and a power feeding device provided at a charging spot, and the charging device includes a power receiving coil and a sonar. The power supply device includes a power supply coil, and the charging spot includes a step protruding or indented with respect to the floor surface. When the vehicle enters the charging spot, a sound wave is transmitted from the sonar so that the sonar and the step By detecting the distance between them, it is detected that a step is located directly below the sonar, and when the step is located directly below the sonar, the receiving coil and the feeding coil have a predetermined air gap. While facing each other.

At least two or more steps may be provided.
The steps are provided in a line in a direction perpendicular to the center line in the width direction of the vehicle or the center line in the width direction of the parking space of the charging spot. The arrangement may be asymmetric.
At least two or more sonars may be provided.

  According to the present invention, the charging device includes a power receiving coil, the power feeding device includes a power feeding coil and a sonar, the vehicle includes a step protruding or indented with respect to a bottom surface portion thereof, and the power receiving coil includes the vehicle. It protrudes or indents with respect to the bottom part of this. After detecting that the receiving coil is located directly above the sonar by transmitting a sound wave from the sonar when the vehicle enters the charging spot and detecting the distance between the sonar, the receiving coil and the step. , It detects that a step is located directly above the sonar. When the step is located directly above the sonar, the power receiving coil and the power feeding coil are opposed to each other with a predetermined air gap. The vehicle can be parked so as to have a positional relationship facing each other with a gap.

It is the schematic of the non-contact charge system which concerns on Embodiment 1 of this invention. It is the schematic of the electric power feeder provided in the non-contact charge system which concerns on Embodiment 1 of this invention. It is the schematic of the charging device provided in the non-contact charging system which concerns on Embodiment 1 of this invention. It is the schematic at the time of the vehicle approach to the charging spot of the non-contact charging system which concerns on Embodiment 1 of this invention. It is a top view at the time of the vehicle approach to the charging spot of the non-contact charging system which concerns on Embodiment 1 of this invention. In the non-contact charging system according to Embodiment 1 of the present invention, it is a waveform diagram showing a transmission period of sound waves from the sonar before the foremost part of the vehicle reaches directly above the sonar. In the non-contact charging system according to Embodiment 1 of the present invention, it is a waveform diagram showing the transmission period of sound waves from sonar after the foremost part of the vehicle has reached directly above the sonar. In the non-contact charging system which concerns on Embodiment 1 of this invention, it is the schematic which shows the change of the detection distance of the sonar when a vehicle approachs the charging spot. It is a top view at the time of the vehicle approach to the charging spot of the non-contact charging system which concerns on Embodiment 2 of this invention. It is the schematic of the electric power feeder provided in the non-contact charge system which concerns on Embodiment 2 of this invention. It is a top view which shows arrangement | positioning of the sonar provided in the non-contact charging system which concerns on Embodiment 2 of this invention. It is a top view which shows arrangement | positioning of the protrusion provided in the non-contact charge system which concerns on Embodiment 2 of this invention. In the non-contact charge which concerns on Embodiment 2 of this invention, it is the schematic which shows the positional relationship of a sonar and protrusion when a vehicle approachs a charging spot.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
FIG. 1 shows the configuration of the contactless charging system according to Embodiment 1 of the present invention.
The non-contact charging system 1 includes a power feeding device 4 provided at the charging spot 2 and a charging device 5 provided at the vehicle 3. The charging spot 2 is provided with a power feeding device 4 for supplying electric power to the vehicle 3. The vehicle 3 is provided with a charging device 5 for charging the electric power supplied from the power supply device 4. The power feeding device 4 is provided with a power feeding coil 6 and a sonar 7, and the charging device 5 is provided with a power receiving coil 8. The feeding coil 6 and the sonar 7 are provided on the floor surface 9 of the charging spot 2, and the receiving coil 8 is provided on the bottom surface portion 10 of the vehicle 3. The sonar 7 is provided at a position (see FIG. 4) on the near side of the feeding coil 6 with respect to the traveling direction of the vehicle 3 when the vehicle 3 enters the charging spot 2. The power receiving coil 8 is provided so as to protrude from the bottom surface portion 10 of the vehicle 3. A substantially cylindrical protrusion 11 is provided so as to protrude from the bottom surface portion 10 of the vehicle 3. The protrusion 11 is provided behind the vehicle 3 with respect to the power receiving coil 8 (see FIG. 4). The feeding coil 6 and the receiving coil 8 are opposed to each other with a predetermined air gap when the vehicle 3 is parked at a parking position where the protrusion 11 of the vehicle 3 is opposed to the sonar 7 of the charging spot 2 at the closest distance. Is provided.

  The configuration of the power feeding device 4 is shown in FIG. The feeding coil 6 is electrically connected to the feeding device matching unit 12. The power feeding device matching unit 12 is electrically connected to the power conversion unit 13. The power converter 13 is electrically connected to the AC power source 14. The power feeding device wireless communication device 15 is electrically connected to the power feeding device antenna 16. The power feeding device control device 17 is electrically connected to the sonar 7, the power feeding device matching unit 12, the power source conversion unit 13, and the power feeding device wireless communication device 15.

  The structure of the charging device 5 is shown in FIG. The power receiving coil 8 is electrically connected to the charging device matching unit 18. The charging device matching unit 18 is electrically connected to the rectifying unit 19. The rectification unit 19 is electrically connected to the detection unit 20 outside the charging device 5. The detection unit 20 is electrically connected to a battery unit 21 outside the charging device 5. The charging device wireless communication device 22 is electrically connected to the charging device antenna 23. The charging device control device 24 is electrically connected to the charging device matching unit 18, the rectification unit 19, the detection unit 20, the battery unit 21, and the charging device wireless communication device 22.

Next, the operation of the contactless charging system according to Embodiment 1 of the present invention will be described.
As shown in FIG. 4, in the non-contact charging system 1, the vehicle 3 moves forward in the direction of arrow A in order to park at a predetermined parking position of the charging spot 2 for charging. At this time, by providing guides such as grooves and white lines (not shown) on the floor surface 9 of the charging spot 2 with respect to the vehicle approach direction, parking in the vehicle width direction indicated by the arrow B as shown in FIG. The position is not shifted.

  When the vehicle 3 moves forward in the direction of the arrow A, the foremost portion 25 of the vehicle 3 passes directly above the sonar 7, and the bottom surface portion 10 is positioned directly above the sonar 7. When the vehicle 3 further enters in the direction of arrow A, the power receiving coil 8 is positioned directly above the sonar 7. When the vehicle 3 further enters in the direction of the arrow A, the bottom surface portion 10 is located directly above the sonar 7. Further, when the vehicle 3 enters in the direction of arrow A, the protrusion 11 is positioned directly above the sonar 7.

  The sonar 7 emits a sound wave, converts an input to the sonar 7 of the sound wave reflected by the object at the sound wave transmission destination into an electric signal, and outputs the electric signal to the power feeding device control device 17 (see FIG. 2). As shown in FIG. 6, in the state where there is no reflector above the sonar 7, the sonar 7 emits a sound wave toward the upper portion of the sonar 7 at a time interval of 100 ms (long-period transmission state). The power feeding device control device 17 checks whether a signal is input to the sonar 7 and checks whether the reflected wave is received by the sonar 7. When the reflective object is positioned above the sonar 7 and the sonar 7 receives the reflected wave, the power feeding device controller 17 moves the sonar 7 above the sonar 7 at a short cycle of every 5 ms as shown in FIG. It shifts to the short cycle transmission state which transmits a sound wave toward In the short cycle transmission state, the power feeding device control device 17 measures the time from the sound wave transmission by the sonar 7 to the reception of the reflected wave, and measures the distance to the reflecting object.

  As shown in FIGS. 4 and 5, when the vehicle 3 moves forward in the direction of the arrow A and the forefront portion 25 reaches just above the sonar 7, the sonar 7 shifts to the short-cycle transmission state. The detection distance of the sonar 7 determined by the power feeding device control device 17 (see FIG. 2) as shown in FIG. 8D is the distance from the sonar 7 to the bottom surface 10. Further, when the vehicle 3 enters in the direction of the arrow A and the power receiving coil 8 reaches just above the sonar 7, the detection distance of the sonar 7 determined by the power feeding device control device is from the sonar 7 as shown in E of FIG. This is the distance to the power receiving coil 8. Further, when the vehicle 3 moves forward in the direction of arrow A and the power receiving coil 8 is removed from directly above the sonar 7, the detection distance of the sonar 7 determined by the power feeding device controller 17 is as shown in FIG. It becomes the same distance as D. Further, when the vehicle 3 moves forward in the direction of arrow A and the protrusion 11 reaches just above the sonar 7, the detection distance of the sonar 7 determined by the power feeding device control device 17 is the sonar 7 as shown in G of FIG. To the protrusion 11. When the detection distance of the sonar 7 becomes G, the power feeding coil 6 and the power receiving coil 8 face each other with a predetermined air gap, so that the vehicle is located at the position where the detection distance of the sonar 7 becomes G in FIG. By parking 3, the vehicle 3 can be parked at a position optimal for charging the vehicle 3.

  Moreover, the present positional relationship with respect to the predetermined | prescribed parking position of the vehicle 3 is detectable according to which state of the detection distances D-G (refer FIG. 8) of the sonar 7 exists. In order to notify the driver of the vehicle 3 of the detection distances D to G of the sonar 7, the detection distances D to G are transmitted from the power supply device control device 17 to the power supply device wireless communication device 15, as shown in FIGS. The power feeding device wireless communication device 15 transmits the detection distance of the sonar 7 from the power feeding device antenna 16 to the charging device antenna 23. The detection distance of the sonar 7 is input to the charging device wireless communication device 22 via the charging device antenna 23. The charging device wireless communication device 22 outputs the detection distance of the sonar 7 to the charging device control device 24. The charging device control device 24 operates a notifying device (not shown) provided in the vehicle 3 (see FIG. 4) corresponding to the input detection distance of the sonar 7, for example, depending on the interval or strength of the electronic sound. The detected positional relationship between the power feeding coil 6 and the power receiving coil 8 can be notified to the driver. As shown in FIG. 4, the sonar 7 detects the detection distance E (see FIG. 8) when the power receiving coil 8 protrudes from the bottom surface portion 10 of the vehicle 3, so this is notified to the driver of the vehicle 3. Thus, before the sonar 7 detects the detection distance G, the driver of the vehicle 3 can know that the vehicle 3 is approaching the optimal position for charging.

  After the vehicle 3 is parked at a position optimal for charging, a charging operation is performed between the charging spot 2 and the vehicle 3. Specifically, as shown in FIG. 2, the power supply unit 13 converts the voltage and frequency of the power supplied from the AC power source 14, and the power feeding device matching unit 12 and the charging device matching unit 18 (see FIG. 3) Then, impedance matching is performed and supplied to the feeding coil 6. In the power receiving coil 8 (see FIG. 3) facing the power feeding coil 6 with a predetermined air gap, charging power is generated by the interaction of electromagnetic induction. The charging power is rectified by the rectification unit 19 via the charging device matching unit 18 and charged to the battery unit 21 via the detection unit 20 for detecting voltage and current.

  As described above, the charging device 5 includes the power receiving coil 8, the power feeding device 4 includes the power feeding coil 6 and the sonar 7, and the vehicle 3 includes the protrusion 11 that protrudes from the bottom surface portion 10. 8 protrudes from the bottom surface portion 10. When the vehicle 3 enters the charging spot 2, a sound wave is transmitted from the sonar 7, and the distance between the sonar 7, the power receiving coil 8 and the protrusion 11 is detected, so that the power receiving coil 8 is positioned directly above the sonar 7. After detecting this, it is detected that the protrusion 11 is positioned right above the sonar 7. When the protrusion 11 is positioned directly above the sonar 7, the power receiving coil 8 and the power feeding coil 6 are opposed to each other with a predetermined air gap. The vehicle can be parked such that the two have a predetermined air gap and have a positional relationship facing each other.

  In the first embodiment, only one protrusion 11 is provided, but two or more protrusions 11 may be provided with the power receiving coil 8 interposed therebetween. For example, when two protrusions 11 are provided across the power receiving coil 8, when the vehicle 3 moves forward in the direction of the arrow A, the sonar 7 detects the detection distance D by the bottom surface portion 10, and then the sonar 7 The detection distance G by the projection 11 is detected. Next, the sonar 7 detects the detection distance D by the bottom surface portion 10. Further, the sonar 7 detects the detection distance E by the power receiving coil 8, and then the sonar 7 detects the detection distance F by the bottom surface portion 10. Thereafter, the sonar 7 detects the detection distance G by the other protrusion 11 again. For this reason, when the sonar 7 detects the detection distance G by the one protrusion 11 and the detection distance E by the power receiving coil 8, the driver of the vehicle 3 reaches the position where the vehicle 3 is optimal for charging. You can learn more about the distance.

Embodiment 2
Next, the structure of the non-contact charge system which concerns on Embodiment 2 of this invention is shown. In the following embodiments, the same reference numerals as those in FIGS. 1 to 8 are the same or similar components, and thus detailed description thereof is omitted.
The contactless charging system according to the second embodiment of the present invention is different from the first embodiment in that a plurality of vehicle protrusions and a plurality of charging spot sonars are provided.

  As shown in FIG. 9, sonars 7 a, 7 b, and 7 c are provided on the floor surface 9 of the charging spot 26 at intervals in a direction perpendicular to the traveling direction of the vehicle 27. On the bottom surface portion 10 of the vehicle 27, substantially cylindrical protrusions 11a, 11b, 11c, and 11d are provided at intervals in a direction perpendicular to the traveling direction of the vehicle 27. The protrusions 11 a, 11 b, 11 c, and 11 d are provided at positions that are behind the vehicle 27 with respect to the power feeding coil 6. As shown in FIG. 10, the sonars 7 a, 7 b, and 7 c are electrically connected to the power feeding device control device 17. As shown in FIG. 11, the sonar 7 b passes through the center 6 a of the feeding coil 6 and is provided on a straight line H that is the center line in the width direction of the parking space of the charging spot 26 (see FIG. 9). The sonars 7a, 7b, and 7c are provided so as to be arranged on a straight line I on the floor surface 9 that intersects the straight line H perpendicularly. As shown in FIG. 9, when the left side of the vehicle 27 is the left side 28 and the right side of the vehicle 27 is the right side 29, the direction from the left side 28 to the right side 29 is shown to the driver of the vehicle 27. In addition, an arrow is provided on the straight line I in FIG. As shown in FIG. 11, the distance J between the sonar 7a and the sonar 7b and the distance K between the sonar 7b and the sonar 7c are 10 cm. As shown in FIG. 12, the protrusion 11 b is provided on a straight line L that is a center line in the width direction extending through the center 8 a of the power receiving coil 8 and extending in the front-rear direction of the vehicle 27 (see FIG. 9). The protrusions 11a, 11b, 11c, and 11d are provided so as to be aligned on a straight line M on the bottom surface 10 that intersects the straight line L perpendicularly. The protrusion 11 a is provided on the left side 28 side with respect to the straight line L. The protrusions 11c and 11d are provided on the right side 29 side with respect to the straight line L. An arrow is provided on the straight line M to indicate the direction from the left side 28 to the right side 29. The distance N between the protrusion 11a and the protrusion 11b is 5 cm. The distance O between the protrusion 11b and the protrusion 11c and the distance P between the protrusion 11c and the protrusion 11d are 10 cm. That is, the protrusions 11 a, 11 b, 11 c, and 11 d are disposed asymmetrically with respect to the straight line L that is the center line in the width direction of the vehicle 27. As shown in FIG. 9, the feeding coil 6 and the receiving coil 8 are such that the protrusion 11 b of the vehicle 27 is opposed to the sonar 7 b of the charging spot 26 at the closest distance, and the protrusion 11 c of the vehicle 27 is closest to the sonar 7 c of the charging spot 26. When the vehicle 27 is parked at a parking position opposed by a distance, the vehicle 27 is provided so as to face each other with a predetermined air gap. Other configurations are the same as those of the first embodiment.

Next, the operation of the non-contact charging system according to Embodiment 2 of the present invention will be described.
As shown in FIG. 9, the vehicle 27 moves forward in the direction of arrow A in order to park at a predetermined parking position of the charging spot 26. At this time, a guide such as a groove or a white line (not shown) is not necessarily provided on the floor surface 9 of the charging spot 26.

  The operation of each of the sonars 7a, 7b, 7c until the foremost part 25 of the vehicle 27 reaches just above the sonars 7a, 7b, 7c and the sonars 7a, 7b, 7c receive the reflected wave from the bottom surface part 10. This is the same as the sound wave transmission operation for every 100 ms time interval in the first embodiment (see FIG. 6). The operation of each of the sonars 7a, 7b, 7c after the foremost part 25 of the vehicle 27 reaches just above the sonars 7a, 7b, 7c is the same as the operation in the continuous transmission state in the first embodiment (FIG. 7). reference).

  As in the first embodiment, when the forefront portion 25 reaches directly above the sonars 7a, 7b, and 7c and the sonars 7a, 7b, and 7c shift to the continuous transmission state, as shown in FIG. The detection distances of the sonars 7a, 7b, 7c determined by 17 (see FIG. 10) are the distances from the sonars 7a, 7b, 7c to the bottom surface part 10. Further, when the vehicle 27 moves forward in the direction of arrow A and the power receiving coil 8 reaches directly above at least one of the sonars 7a, 7b, 7c, of the sonars 7a, 7b, 7c determined by the power feeding device control device 17 The detection distance of the sonar at which the power receiving coil 8 has reached directly above is the distance from the sonar at which the power receiving coil has reached directly above the sonar 7a, 7b, 7c to the power receiving coil 8, as shown by E in FIG. Further, when the vehicle 3 moves forward in the direction of arrow A and the power receiving coil 8 is removed from directly above any of the sonars 7a, 7b, 7c, the true of the sonars 7a, 7b, 7c determined by the power feeding device controller 17 is true. The detection distance of the sonar with the receiving coil 8 removed from above is the same distance as D in FIG. Further, the vehicle 27 moves forward in the direction of the arrow A, and any one or more of the protrusions 11a, 11b, 11c, and 11d reach just above one or more of the sonars 7a, 7b, and 7c. At this time, with respect to the sonar in which any of the protrusions 11a, 11b, 11c, and 11d has reached right above, the detection distance determined by the power feeding device control device 17 is the sonar 7a, 7b, as indicated by G in FIG. , 7c to any one of the projections 11a, 11b, 11c, and 11d directly above.

  At this time, as shown in FIG. 13A, the straight line H and the straight line L coincide, that is, the parking position of the vehicle 27 is not shifted in the width direction with respect to the parking space of the charging spot 26 (position shift). In the case of 0 cm), when the straight line I on the floor surface 9 and the straight line M on the bottom surface portion 10 match when the vehicle 27 is viewed from directly above, the straight line L directly above the sonar 7b on the straight line H. The upper protrusion 11b is located. Further, the protrusion 11c is positioned directly above the sonar 7c. Therefore, the power feeding device control device 17 determines that the detection distance of the sonars 7b and 7c is G in FIG. 8 and that a protrusion exists right above the sonars 7b and 7c.

  Further, as shown in FIG. 13B, the straight line H is 5 cm away from the straight line L toward the left side 28 of the vehicle 27, that is, the vehicle 27 moves forward with respect to the parking space of the charging spot 26. When the parking position of the vehicle 27 is shifted 5 cm to the right in the width direction with respect to the direction, when the straight line I and the straight line M coincide with each other when the vehicle 27 is viewed from directly above, it is directly above the sonar 7b. The protrusion 11a is located. Accordingly, the power feeding device control device 17 determines that the detection distance of the sonar 7b is G in FIG. 8 and that the protrusion is directly above the sonar 7b.

  Further, as shown in FIG. 13C, the straight line H is 10 cm away from the straight line L toward the left side 28 of the vehicle 27, that is, the vehicle 27 with respect to the parking space of the charging spot 26. If the parking position of the vehicle 27 is shifted 10 cm to the right in the width direction with reference to the forward direction of the vehicle, the straight line I and the straight line M match when the vehicle 27 is viewed from directly above. The protrusion 11b is located on the top. Accordingly, the power supply device control device 17 determines that the detection distance of the sonar 7c is G in FIG. 8 and that the protrusion is directly above the sonar 7c.

  Further, as shown in FIG. 13 (d), the straight line H is 5 cm away from the straight line L on the right side 29 side of the vehicle 27, that is, with respect to the parking space of the charging spot 26. If the parking position of the vehicle 27 is shifted by 5 cm to the left in the width direction with reference to the forward direction of the vehicle, when the straight line I and the straight line M coincide with each other when the vehicle 27 is viewed from directly above, The protrusion 11a is located on the top. Therefore, the power supply device control device 17 determines that the detection distance of the sonar 7a is G, and that there is a protrusion directly above the sonar 7a.

  Further, as shown in FIG. 13 (e), the straight line H is 10 cm away from the straight line L toward the right side 29 of the vehicle 27, that is, the parking space of the charging spot 26 is the vehicle 27. When the parking position of the vehicle 27 is shifted 10 cm to the left in the width direction with respect to the forward direction of the vehicle 27, the sonar when the straight line I and the straight line M coincide with each other when the vehicle 27 is viewed from directly above. The protrusion 11b is located directly above 7a, the protrusion 11c is located directly above the sonar 7b, and the protrusion 11d is located directly above the sonar 7c. Therefore, the power feeding device control device 17 determines that the detection distances of the sonars 7a, 7b, and 7c are G, and that the protrusion is directly above the sonars 7a, 7b, and 7c.

  Therefore, a protrusion is directly above each of the sonars 7a, 7b, and 7c determined by the power feeding device control device 17 depending on how much the parking position of the vehicle 27 is displaced in the width direction with respect to the parking space of the charging spot 26. The determination result of whether or not it exists is determined. That is, when it is determined that there is a protrusion directly above the sonars 7b and 7c, the deviation in the width direction of the parking position of the vehicle 27 is 0 cm. When it is determined that there is a protrusion directly above the sonar 7b, the parking position of the vehicle 27 is shifted by 5 cm to the right in the width direction with respect to the parking space of the charging spot 26 with reference to the approach direction of the vehicle 27. When it is determined that there is a protrusion directly above the sonar 7c, the parking position of the vehicle 27 is shifted 10 cm to the right in the width direction with respect to the parking space of the charging spot 26 with reference to the approach direction of the vehicle 27. When it is determined that there is a protrusion directly above the sonar 7a, the parking position of the vehicle 27 is shifted by 5 cm to the left in the width direction with respect to the parking space of the charging spot 26 with reference to the approach direction of the vehicle 27. If it is determined that there is a protrusion directly above the sonars 7a, 7b, 7c, the parking position of the vehicle 27 is 10 cm on the left side in the width direction with respect to the parking space of the charging spot 26 with respect to the approach direction of the vehicle 27. It's off.

  As shown in FIG. 3 and FIG. 10, this determination result is output from the power supply device control device 17 to the power supply device wireless communication device 15, and the power supply device wireless communication device 15 sends the determination result from the power supply device antenna 16 to the charging device antenna 23. Send to. The determination result is input to the charging device wireless communication device 22 via the charging device antenna 23. The charging device wireless communication device 22 outputs the determination result to the charging device control device 24, and the charging device control device 24 derives the direction and degree of the shift in the width direction of the parking position of the vehicle 27 corresponding to the input determination result. Then, by operating a not-illustrated notification device provided on the vehicle 27, the driver of the vehicle 27 can be notified of a shift in the parking position with respect to the parking space of the charging spot 26 of the vehicle 27 by, for example, an electronic sound. . The charging operation after the vehicle 27 is parked at the optimal position for charging is the same as in the first embodiment.

  Thus, by providing a plurality of sonars 7 a, 7 b, 7 c on the floor surface 9 of the charging spot 26 and providing a plurality of protrusions 11 a, 11 b, 11 c, 11 d on the bottom surface portion 10 of the vehicle 27, In addition to the positional relationship between the power feeding coil 6 and the power receiving coil 8, the positional relationship between the power feeding coil 6 and the power receiving coil 8 in the width direction of the vehicle 27 can be detected.

  In the second embodiment, there are three sonars 7 provided at the charging spot 26 and four protrusions 11 provided on the vehicle 27. However, a shift in the width direction of the parking position of the vehicle 27 is detected. For this purpose, at least two or more sonars may be provided at the charging spot, and at least one protrusion may be provided at the vehicle. The distance between each sonar and each projection, and the arrangement of each sonar and each projection may be any distance and arrangement suitable for detecting the positional relationship between the feeding coil 6 and the receiving coil 8. In the second embodiment, the sonar 7 is arranged symmetrically with respect to the center of the vehicle 27 in the width direction, but may be arranged asymmetrically.

  In the second embodiment, the four projections 11a to 11d are provided as one set in one row, but two or more sets of the projections 11a to 11d may be provided with the power receiving coil 8 interposed therebetween. For example, when two protrusions 11a to 11d are provided across the power receiving coil 8, when the vehicle 27 moves forward in the direction of the arrow A, after the sonars 7a to 7c detect the detection distance D by the bottom surface portion 10, The sonars 7a to 7c detect the detection distance G by the one protrusions 11a to 11d. Here, when there is only one set of the projections 11a to 11d, it is determined whether the projections 11a to 11d are directly above any of the sonars 7a to 7c. Compared to earlier. Next, the sonars 7 a to 7 c detect the detection distance D by the bottom surface part 10. Further, the sonars 7 a to 7 c detect the detection distance E by the power receiving coil 8, and then the sonars 7 a to 7 c detect the detection distance F by the bottom surface part 10. Thereafter, the sonars 7a to 7c again detect the detection distance G by the other protrusions 11a to 11d. For this reason, when the sonars 7a to 7c detect the detection distance G by the one protrusions 11a to 11d and the detection distance E by the power receiving coil 8, the driver of the vehicle 27 is optimal for charging the vehicle 27. You can know the distance to reach the position in more detail.

  In the first and second embodiments, the power receiving coil is provided so as to protrude from the bottom surface portion of the vehicle, but may be provided so as to be recessed with respect to the bottom surface portion of the vehicle. Further, the power receiving coil may be provided so as to be flat with respect to the bottom surface portion of the vehicle. In this case, the distance between the power receiving coil and the sonar is not used to detect the positional relationship between the power feeding coil and the power receiving coil, but the distance between the bottom surface of the vehicle and the protrusion and the sonar is used.

  In Embodiments 1 and 2, the sonar is provided on the floor surface of the charging spot and the protrusion is provided on the bottom surface of the vehicle, but the protrusion is provided on the floor surface of the charging spot and the sonar is provided on the bottom surface of the vehicle. May be. In this case, the sonar is provided at a position in front of the vehicle with respect to the power receiving coil, and the protrusion is provided at a position behind the feeding coil with respect to the traveling direction of the vehicle when the vehicle enters the charging spot. Further, the feeding coil is provided so as to protrude or intrude from the floor surface of the charging spot. Furthermore, the power supply coil may be provided so as to be flat with respect to the floor surface of the charging spot. In this case, for detecting the positional relationship between the feeding coil and the receiving coil, the distance between the feeding coil and the sonar is not used, but the distance between the floor surface of the charging spot and the protrusion and the sonar is used.

  In the first and second embodiments, the protrusions are substantially columnar, but may have other shapes such as a substantially prismatic shape as long as they can reflect sound waves with respect to sonar. Furthermore, although the protrusions are provided in the first and second embodiments, a recess that is recessed with respect to the bottom surface of the vehicle or the floor surface of the charging spot may be provided instead. In other words, it may be a step that protrudes or indents with respect to the bottom surface so that the distance from the sonar is different.

  In the first and second embodiments, the vehicle moves forward and parks with respect to the parking space at the charging spot, but the vehicle may move backward and park with respect to the parking space at the charging spot. When the vehicle is provided with a step that is a protrusion or a depression and the sonar is provided at the charging spot, the step is provided at a position in front of the vehicle with respect to the power receiving coil, and the sonar is inserted into the charging spot when the vehicle moves backward. It is provided at a position in front of the power supply coil with respect to the traveling (retreating) direction of the vehicle. On the other hand, when a sonar is provided in the vehicle and a step is provided at the charging spot, the sonar is provided at a position behind the vehicle with respect to the power receiving coil, and the vehicle advances when the vehicle enters the charging spot in a backward direction. It is provided at a position behind the feeding coil with respect to the (retreat) direction.

  In Embodiments 1 and 2, transmission of electric power between the feeding coil and the receiving coil is performed using the electromagnetic induction method, but an electromagnetic resonance method may be used.

  In Embodiments 1 and 2, the sonar detection result is performed by wireless communication using radio waves via the power supply device wireless communication device and the charging device wireless communication device. Also good. In addition, the electronic sound was used as a means for transmitting the detection result of the sonar to the driver. However, visual means such as an indicator lamp or display on the display may be used, or the detection result of the sonar may be sent to the parking support system. Means of assisting the driver by inputting may be used.

  In the first and second embodiments, when the vehicle has not entered the charging spot, the sonar emits a sound wave toward the upper portion of the sonar every 100 ms, and when the vehicle has entered the charging spot, the sonar Used to emit sound waves toward the upper side of the sonar at short intervals of 5 ms. If sound waves could be detected when the vehicle entered, the protrusion of the power receiving coil or the feeding coil, and the level difference that was a protrusion or depression, Another value may be sufficient as the time interval which transmits.

  In the first and second embodiments, the detection distance or the determination distance is transmitted to the vehicle, and a notification device (not shown) provided in the vehicle is operated to notify the driver of the positional relationship or the positional deviation. Alternatively, the determination result may not be transmitted to the vehicle, and a notification device (not shown) (for example, an indicator lamp) provided in the power supply apparatus may be operated to notify the driver.

  DESCRIPTION OF SYMBOLS 1 Non-contact charging system, 2,26 Charging spot, 3,27 Vehicle, 4 Power feeding device, 5 Charging device, 6 Power feeding coil, 7, 7a, 7b, 7c Sonar, 8 Power receiving coil, 9 Floor surface, 10 Bottom surface portion, 11, 11a, 11b, 11c, 11d Protrusion (step), H, L straight line (center line).

Claims (10)

A non-contact charging system comprising a charging device mounted on a vehicle and a power supply device provided at a charging spot,
The charging device includes a power receiving coil,
The power supply device includes a power supply coil and a sonar,
The vehicle includes a step protruding or indented with respect to a bottom surface portion thereof,
The power receiving coil is provided to protrude or intrude with respect to the bottom surface portion,
When the vehicle enters the charging spot, a sound wave is transmitted from the sonar and the distance between the sonar, the power receiving coil and the step is detected, so that the power receiving coil is directly above the sonar. After detecting that the step is located, the step is detected immediately above the sonar, and when the step is located directly above the sonar, the power receiving coil and the power feeding are detected. A non-contact charging system facing a coil with a predetermined air gap. A non-contact charging system comprising a charging device mounted on a vehicle and a power feeding device provided at a charging spot,
The charging device includes a power receiving coil and a sonar,
The power supply device includes a power supply coil,
The charging spot is provided with a stepped or recessed step with respect to the floor surface,
The feeding coil is provided so as to protrude or intrude with respect to the floor surface,
When the vehicle enters the charging spot, a sound wave is transmitted from the sonar, and the distance between the sonar, the power feeding coil, and the step is detected, so that the power feeding coil is positioned directly below the sonar. After detecting that the step is located immediately below the sonar, and when the step is located directly below the sonar, the receiving coil and the feeding coil are A non-contact charging system that has a predetermined air gap and faces each other.   The contactless charging system according to claim 1 or 2, wherein at least two or more steps are provided.   The steps are provided in one row in a direction perpendicular to the center line in the width direction of the vehicle or the center line in the width direction of the parking space of the charging spot, and the steps on both sides with respect to the center line. The contactless charging system according to claim 3, wherein the arrangement of is asymmetric.   The non-contact charging system according to claim 1, wherein at least two sonars are provided. A non-contact charging system comprising a charging device mounted on a vehicle and a power feeding device provided at a charging spot,
The charging device includes a power receiving coil,
The power supply device includes a power supply coil and a sonar,
The vehicle includes a step protruding or indented with respect to a bottom surface portion thereof,
When the vehicle enters the charging spot, the step is positioned directly above the sonar by transmitting a sound wave from the sonar and detecting a distance between the sonar and the step. When the step is positioned directly above the sonar, the power receiving coil and the power feeding coil face each other with a predetermined air gap. A non-contact charging system comprising a charging device mounted on a vehicle and a power feeding device provided at a charging spot,
The charging device includes a power receiving coil and a sonar,
The power supply device includes a power supply coil,
The charging spot is provided with a stepped or recessed step with respect to the floor surface,
When the vehicle enters the charging spot, a sound wave is transmitted from the sonar and the distance between the sonar and the step is detected, so that the step is located directly below the sonar. A non-contact charging system in which the power receiving coil and the power feeding coil face each other with a predetermined air gap when the step is located directly below the sonar.   The contactless charging system according to claim 6 or 7, wherein at least two or more steps are provided.   The steps are provided in one row in a direction perpendicular to the center line in the width direction of the vehicle or the center line in the width direction of the parking space of the charging spot, and the steps on both sides with respect to the center line. The contactless charging system according to claim 8, wherein the arrangement of is asymmetric.   The contactless charging system according to any one of claims 6 to 9, wherein at least two or more sonars are provided.

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