JP2015035927A - Power transmission apparatus, power reception apparatus and non-contact power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power transmission apparatus, a power reception apparatus and a non-contact power transmission device, enabling position grasp of a power transmission target according to a situation.SOLUTION: A non-contact power transmission device 10 includes: a power transmission apparatus 11 having a power transmission unit 13 including a primary side coil 13a to which AC power is input; and a power reception apparatus 21 having a power reception unit 23 including a secondary side coil 23a capable of receiving AC power from the primary side coil 13a in a non-contact manner. The power transmission apparatus 11 includes a detector unit 50 for detecting, by radiating a detection beam B, a reflection beam Br of the detection beam B.

Description

  The present invention relates to a power transmission device, a power reception device, and a contactless power transmission device.

  As a non-contact power transmission device that does not use a power cord or a power transmission cable, for example, a power transmission device having a primary coil to which AC power is input and a secondary side that can receive AC power in a non-contact manner from the primary coil What is provided with the power receiving apparatus which has a coil is known (for example, refer patent document 1). In such a non-contact power transmission device, AC power is transmitted from a power transmitting device to a power receiving device in a non-contact manner, for example, by magnetic resonance between the primary side coil and the secondary side coil. Further, for example, in Patent Document 2, in a non-contact power transmission device in which a power receiving device is mounted on a vehicle, a center line in the vehicle width direction is used by using a contact-type detection unit provided on a rotatable wheel stopper. A configuration for detecting the error is described.

JP 2009-106136 A JP 2011-217451 A

  For example, in the configuration in which the contact type detection unit is provided in the ring stopper as in the above-mentioned Patent Document 2, a situation in which the user hooks his / her foot on the wheel stopper may occur, and the wheel stopper is likely to be an obstacle. In addition, the degree of freedom of the parking mode of the vehicle is low due to the need for the tire to contact the wheel stopper.

  On the other hand, the inventors of the present invention focused on grasping the position and the like of the power transmission target on which the power receiving device is mounted from the reflected beam by irradiating the detection beam. In this case, since there is a variation in the detection result of the reflected beam, there is a concern about a decrease in accuracy related to grasping the position of the power transmission target. However, if various processes using the detection result are performed excessively in order to increase the accuracy, the time required for grasping the position becomes long.

  Here, for example, in a certain situation, it may be required to accurately grasp the position of the power transmission target. In another situation, for example, it may be required to grasp the position of the power transmission target at high speed in order to determine whether or not the power transmission target is moving. Thus, in non-contact power transmission, what is required for grasping the position of a power transmission target may differ depending on the situation.

  An object of the present invention is made in view of the above-described circumstances, and is to provide a power transmission device, a power reception device, and a non-contact power transmission device capable of grasping a position of a power transmission target according to the situation.

  A power transmission device that achieves the above object includes a primary side coil to which AC power is input, and is capable of transmitting the AC power in a non-contact manner to a power receiving device having a secondary side coil. And a derivation unit for deriving a position of a power transmission target on which the power receiving device is mounted based on a detection result of the detection unit, and a detection unit that detects a reflected beam of the detection beam toward the same direction A first calculation unit that calculates an average of a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times, and calculates an average of the number of derived positions that is smaller than the first calculation unit And a second calculation unit.

  According to this configuration, the first calculation unit has more samples than the second calculation unit, which is the number of derived positions used to calculate the average. Thereby, the 1st calculation part can calculate a more highly accurate average compared with the 2nd calculation part. On the other hand, since the second calculation unit has a smaller number of samples than the first calculation unit, the processing time required to calculate the average tends to be shorter. Therefore, for example, when it is desired to grasp the position of the power transmission target with high accuracy, the calculation result by the first calculation unit is used, and when it is desired to grasp the position of the power transmission target at high speed, the calculation result by the second calculation unit is used. Thus, it is possible to determine the position of the power transmission target according to the situation.

  For the power transmission device, based on the calculation result of the first calculation unit, the position of the specific part to be transmitted is derived, the position of the specific part derived, and the position of the specific part and the secondary coil. Based on the information regarding the relationship, the position of the secondary coil may be specified. According to such a configuration, the position of the specific part is derived using the calculation result of the first calculation unit with relatively high accuracy, and based on the position and information on the positional relationship between the specific part and the secondary coil, The position of the secondary coil is specified. Thereby, the position of the secondary side coil can be specified with high accuracy.

  For the power transmission device, the primary part is determined according to the position of the secondary side coil specified based on the derived position of the specific part and information on the positional relation between the specific part and the secondary coil. A moving mechanism for moving the side coil may be provided. According to this configuration, the primary coil is moved in accordance with the position of the secondary coil that is specified with relatively high accuracy, thereby aligning the primary coil and the secondary coil with high accuracy. Can be done. Thereby, power transmission can be suitably performed toward the power transmission target.

  For the power transmission device, the derivation position is an effective value when the detection unit detects the reflected beam, and an invalid value when the detection unit does not detect the reflected beam. The average of the invalid value and the effective value becomes the invalid value, and when the calculation result of the second calculation unit in at least one direction is the effective value, the transmission target is within the irradiation range of the detection beam. It may be determined that it exists. According to this configuration, when an invalid value is included in the plurality of derived positions used for calculation by the second calculation unit, the calculation result of the second calculation unit is an invalid value. On the other hand, when all of the plurality of derived positions used for calculation by the second calculation unit are valid values, the calculation result of the second calculation unit is an effective value. And when the calculation result of the 2nd calculation part in at least one direction is an effective value, it determines with the power transmission object existing in the irradiation range of a detection beam. As a result, even if there is no power transmission target at a certain timing, it is erroneously determined that there is a power transmission target even if the derived position becomes an effective value due to erroneous detection by the detection unit, etc. Can be avoided. Therefore, it is possible to improve the determination accuracy of whether or not there is a power transmission target. In particular, by using the calculation result of the second calculation unit that is calculated at a relatively high speed in determining whether the power transmission target exists, the power transmission target is arranged after the power transmission target is arranged within the irradiation range of the detection beam. Can be reduced in time lag until it is understood that is located within the irradiation range.

  For the power transmission device, the position of the specific part of the power transmission target is derived based on the calculation result of the second calculation unit, and the temporal change of the derived position of the specific part is equal to or greater than a predetermined movement determination threshold value. In some cases, it may be determined that the power transmission target is moving. According to such a configuration, since it is determined whether the power transmission target is moving based on the time change of the specific part derived using the calculation result of the second calculation unit calculated at a relatively high speed, It can grasp | ascertain more suitably that the power transmission object is moving. Thereby, the various processes corresponding to the power transmission object moving can be suitably performed.

  A power receiving device that achieves the above object is capable of receiving the AC power in a non-contact manner from a power transmitting device having a primary coil to which AC power is input, and irradiates a detection beam and reflects the detection beam. Based on the detection result of the detection unit that detects the beam, based on the deriving unit that derives the position of the power transmission target on which the power receiving device is mounted, and the reflected beam of the detection beam that has been irradiated multiple times in the same direction A first calculation unit that calculates an average of a plurality of derived positions derived; and a second calculation unit that calculates an average of the number of derived positions smaller than the first calculation unit. To do.

  According to this configuration, the first calculation unit has more samples than the second calculation unit, which is the number of derived positions used to calculate the average. Thereby, the 1st calculation part can calculate a more highly accurate average compared with the 2nd calculation part. On the other hand, since the second calculation unit has a smaller number of samples than the first calculation unit, the processing time required to calculate the average tends to be shorter. Therefore, for example, when it is desired to grasp the position of the power transmission target with high accuracy, the calculation result by the first calculation unit is used, and when it is desired to grasp the position of the power transmission target at high speed, the calculation result by the second calculation unit is used. Thus, it is possible to determine the position of the power transmission target according to the situation.

  A non-contact power transmission apparatus that achieves the above object includes a primary coil to which AC power is input, and a secondary coil that can receive the AC power in a non-contact manner from the primary coil, A detector that irradiates a beam and detects a reflected beam of the detection beam; and a derivation unit that derives a position of a power transmission target on which the secondary coil is mounted based on a detection result of the detector; A first calculation unit for calculating an average of a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times toward the average, and an average of the number of the derived positions smaller than the first calculation unit And a second calculation unit that calculates.

  According to this configuration, the first calculation unit has more samples than the second calculation unit, which is the number of derived positions used to calculate the average. Thereby, the 1st calculation part can calculate a more highly accurate average compared with the 2nd calculation part. On the other hand, since the second calculation unit has a smaller number of samples than the first calculation unit, the processing time required to calculate the average tends to be shorter. Therefore, for example, when it is desired to grasp the position of the power transmission target with high accuracy, the calculation result by the first calculation unit is used, and when it is desired to grasp the position of the power transmission target at high speed, the calculation result by the second calculation unit is used. Thus, it is possible to determine the position of the power transmission target according to the situation.

  According to the present invention, it is possible to grasp the position of the power transmission target according to the situation.

The side view which shows typically the outline | summary of a power transmission apparatus, a power receiving apparatus, and a non-contact power transmission apparatus. The top view which shows typically the outline | summary of a power transmission apparatus, a receiving device, and a non-contact power transmission apparatus. The block diagram which shows a part of electrical structure of power transmission equipment. The graph which shows the detection aspect by a detection part. The graph for demonstrating the dispersion | variation in the derived distance. The graph for demonstrating a 1st average coordinate. The graph for demonstrating a 2nd average coordinate. (A), (b) is a graph for demonstrating the structure which concerns on the movement determination of a vehicle. The flowchart which shows the charge process performed with a power supply side controller.

Hereinafter, an embodiment of a power transmission device (power transmission device), a power reception device (power reception device), and a non-contact power transmission device (non-contact power transmission system) will be described.
As shown in FIG. 1, the non-contact power transmission device 10 includes a power transmission device 11 (ground side device) and a power receiving device 21 (vehicle side device) that can transmit power in a non-contact manner. The power transmission device 11 is provided on an installation surface G on which the vehicle C is installed (parked). The power receiving device 21 is mounted on the vehicle C. In the present embodiment, the vehicle C corresponds to a power transmission target.

  The power transmission device 11 includes an AC power supply 12 that can output AC power having a predetermined frequency. The AC power source 12 converts system power supplied from a system power source as infrastructure into AC power, and outputs the converted AC power.

  The AC power output from the AC power supply 12 is transmitted to the power receiving device 21 in a non-contact manner, and used for charging the vehicle battery 22 provided in the power receiving device 21. Specifically, the power transmission device 11 includes a power transmission unit 13 (power transmitter) having a primary side coil 13 a to which AC power is input from the AC power source 12. The power receiving device 21 includes a power receiving unit 23 (power receiver) having a secondary side coil 23a capable of receiving AC power from the primary side coil 13a in a non-contact manner.

  In the present embodiment, the power transmission unit 13 and the power reception unit 23 are formed in a disk shape. Further, the center of the power receiving unit 23 and the center of the secondary side coil 23a coincide with each other, and the center of the power transmission unit 13 and the center of the primary side coil 13a coincide with each other.

  The power transmission unit 13 and the power reception unit 23 are configured to be capable of magnetic field resonance. For example, the power transmission unit 13 has a resonance circuit including a primary side coil 13a and a primary side capacitor (not shown) connected in series or in parallel to the primary side coil 13a. The power receiving unit 23 has a resonance circuit including a secondary coil 23a and a secondary capacitor (not shown) connected in series or in parallel to the secondary coil 23a. Both resonance frequencies are set to be the same.

  According to this configuration, when AC power is input to the power transmission unit 13 in a situation where the power transmission unit 13 and the power reception unit 23 are arranged at positions where magnetic field resonance is possible, the resonance circuit of the power transmission unit 13 and the resonance of the power reception unit 23 are obtained. Magnetic resonance with the circuit. Thereby, the power reception unit 23 receives AC power from the power transmission unit 13 in a non-contact manner. The frequency of the AC power output from the AC power supply 12 is set to be the same as or close to the resonance frequency of the resonance circuit of the power transmission unit 13 and the power reception unit 23.

  Incidentally, the power transmission unit 13 is installed on the installation surface G, and a wheel 13b is provided on the bottom surface thereof. The power receiving unit 23 is disposed at a portion facing the installation surface G, specifically, at the bottom of the vehicle C. In this case, the power transmission unit 13 and the power reception unit 23 can face each other in the vertical direction (vehicle height direction). The wheel 13b is composed of, for example, a free wheel or an omni wheel.

  In FIG. 1, the power receiving unit 23 is arranged so that the bottom surface of the power receiving unit 23 protrudes from the bottom of the vehicle C. However, the power receiving unit 23 is not limited to this, and the bottom surface of the power receiving unit 23 is connected to the bottom of the vehicle C. You may arrange | position in the state embedded in the vehicle C so that it may arrange | position on the same plane or it upwards.

  Incidentally, the vehicle height, which is the distance between the installation surface G and the bottom of the vehicle C (the power receiving unit 23), is set higher than a predetermined minimum value. The minimum value may be, for example, the minimum ground height (for example, 90 mm) set as the safety standard for road transport vehicles.

  The AC power received by the power receiving unit 23 is rectified by the rectifier 24 provided in the power receiving device 21 and input to the vehicle battery 22. Thereby, the vehicle battery 22 is charged.

  The power transmission device 11 includes a power supply side controller 14 that controls the AC power supply 12 and the like. In addition, the power receiving device 21 includes a vehicle-side controller 25 that can wirelessly communicate with the power supply-side controller 14. The non-contact power transmission device 10 starts or ends charging of the vehicle battery 22 while exchanging information between the controllers 14 and 25.

  In addition, although illustration is abbreviate | omitted, the power receiving apparatus 21 is equipped with the SOC sensor which detects the charge condition (SOC) of the battery 22 for vehicles, and transmits the detection result to the vehicle side controller 25. Thereby, the vehicle side controller 25 can grasp | ascertain the charge condition of the battery 22 for vehicles.

  As shown in FIGS. 1 and 2, the power transmission device 11 uses the direction orthogonal to the installation surface G as an axial direction as a moving mechanism that moves the power transmission unit 13 in the direction along the installation surface G (specifically, the horizontal direction). A unit rotation mechanism 30 that rotates the power transmission unit 13 and a linear movement mechanism 40 that linearly moves the power transmission unit 13 in the direction along the installation surface G are provided. Hereinafter, these will be described.

  As shown in FIG. 1, the unit rotating mechanism 30 includes a unit rotating plate 31 that can rotate with a direction orthogonal to the installation surface G (specifically, a vertical direction) as an axial direction, and a rotary motor 32 that rotates the unit rotating plate 31. And. The unit rotating plate 31 is disposed at a position floating with respect to the installation surface G. Specifically, the power transmission device 11 includes a frame-like frame 33 provided on the installation surface G, and the unit rotating plate 31 is installed on the frame 33 in a rotatable state. In this case, the rotation center line A of the unit rotating plate 31 is a line that passes through the center of the unit rotating plate 31 and extends in the vertical direction.

  The linear motion mechanism 40 has a long shape extending in one direction. The linear motion mechanism 40 is provided on the arm rotation portion 41 having one end portion in the extending direction (longitudinal direction) joined to the power transmission unit 13 and the unit rotating plate 31. A linear motion drive unit 42 that is fixed and pushes and pulls the arm unit 41 is provided. The arm portion 41 has a curved portion that curves upward from the horizontal direction toward the other end portion in the extending direction from one end portion in the extending direction. One end portion side in the extending direction extends from the curved portion of the arm portion 41 in the horizontal direction. The other end side of the arm portion 41 in the extending direction from the curved portion extends in the vertical direction and enters the linear drive portion 42 through a through hole 31 a formed in the unit rotating plate 31. And the other end part side of the extending direction of the arm part 41 is accommodated in the linear motion drive part 42 in the state which can move to a perpendicular direction. The linear motion drive unit 42 pushes out the power transmission unit 13 by linearly moving the other end portion of the arm unit 41 in the extending direction from the upper vertical direction to the lower vertical direction. On the other hand, the linear motion drive unit 42 pulls back the power transmission unit 13 by linearly moving the other end portion in the extending direction of the arm unit 41 from the lower vertical direction toward the upper vertical direction. In this case, the linear motion distance of the other end portion in the extending direction of the arm portion 41 corresponds to the linear motion distance of the power transmission unit 13.

  Incidentally, as shown in FIG. 1, an auxiliary roller 43 that assists the bending of the arm portion 41 is provided at the bending portion of the arm portion 41. The auxiliary roller 43 is disposed so as to sandwich the curved portion of the arm portion 41. Thereby, the arm part 41 is movable in the extending direction in a curved state. Although not shown, the auxiliary roller 43 is connected to the unit rotating plate 31 by a connecting member. Therefore, as the unit rotating plate 31 rotates, the relative position of the auxiliary roller 43 with respect to the frame-shaped frame 33 is changed.

  Here, when the unit rotating plate 31 rotates, the relative positions of the linear motion drive unit 42 and the auxiliary roller 43 with respect to the frame-shaped frame 33 are changed accordingly. Then, the arm part 41 rotates. Thereby, the power transmission unit 13 rotates around the rotation center line A. In this case, the direction in which the power transmission unit 13 is pushed out by the arm portion 41, that is, the linear movement direction of the power transmission unit 13 is changed. That is, the unit rotation mechanism 30 changes the linear movement direction of the power transmission unit 13 by moving the power transmission unit 13 in the circumferential direction with respect to the rotation center line A. The linear motion mechanism 40 moves the power transmission unit 13 in the radial direction with respect to the rotation center line A.

  As described above, the power transmission unit 13 is movable in both the radial direction and the circumferential direction with respect to the rotation center line A. Thereby, the power transmission unit 13 can move two-dimensionally along the installation surface G.

  Here, the position where the power transmission unit 13 is closest to the auxiliary roller 43 (rotation center line A) and the intermediate position of the movable angle range of the power transmission unit 13 is set as the initial position of the power transmission unit 13. A line that coincides with the linear movement direction of the power transmission unit 13 at the initial position is defined as a reference line L1. In the following description, for convenience of explanation, the direction along the installation surface G and along the linear movement direction of the power transmission unit 13 at the initial position is referred to as the Y direction, and the direction along the installation surface G and the Y direction. The direction orthogonal to is called the X direction. Furthermore, in the Y direction, the side on which the vehicle C is disposed with respect to the power transmission device 11 is defined as the front, and the opposite side is defined as the rear.

  In addition, the arm part 41 is a hollow cylinder shape, and connects the power transmission unit 13 and the alternating current power supply 12, Comprising: The cable through which alternating current power is transmitted is accommodated. Moreover, the arm part 41 is formed with a rigidity so as not to shrink due to stress in the extending direction. And the arm part 41 is hard to bend in one of the short directions (direction orthogonal to both the linear motion direction and the vertical direction of the power transmission unit 13, specifically the X direction).

Next, a configuration related to position detection of the vehicle C will be described.
As illustrated in FIGS. 1 and 2, the power transmission device 11 of the non-contact power transmission apparatus 10 includes a detection unit 50 that irradiates the detection beam B and detects the reflected beam Br of the detection beam B. The detection beam B is irradiated along a horizontal direction (X direction and Y direction) that is a direction along the installation surface G. The detection unit 50 detects the reflected beam Br that returns to the detection unit 50 when the detection beam B hits the position detection target. In this case, the distance from the detection unit 50 to the position detection target can be derived based on information on the reflected beam Br, for example, the time from when the detection beam B is irradiated until the reflected beam Br is detected.

  Here, as shown in FIG. 1, the detection unit 50 is mounted at a position where the detection beam B is between the bottom of the vehicle C (specifically, the power receiving unit 23) and the installation surface G (specifically, the power transmission unit 13). The detection beam B is set to be irradiated. According to such a configuration, since only the pair of tires T1 and T2 exists between the bottom of the vehicle C and the installation surface G, the detection beam B is applied to the pair of tires T1 and T2, while the vehicle Other parts of C are not irradiated. Therefore, when the detection unit 50 detects the reflected beam Br, the reflected beam Br can be regarded as being from the pair of tires T1 and T2.

  In addition, although the specific aspect of the detection beam B is arbitrary, light, an ultrasonic wave, an electromagnetic wave etc. can be considered, for example. The light includes light having an arbitrary wavelength such as visible light, ultraviolet light, and infrared light. For example, when infrared rays are used as the detection beam B, a method of calculating the optical path length based on the delay time of reflected light can be considered. In addition, when an ultrasonic wave is used as the detection beam B, a method of increasing the directivity using an ultrasonic horn or the like and calculating the propagation length based on the delay time of the reflected wave of the ultrasonic wave can be considered. Further, as the detection beam B, a beam having a relatively high directivity (straightness) whose vertical diffusion angle is close to “0” or “0” is used.

  Incidentally, as shown in FIG. 2, the detection part 50 is arrange | positioned on the reference line L1, and it can rotate it making a perpendicular direction into an axial direction. Specifically, an extension 51 that extends rearward is provided on the front frame 33a that extends forward in the X direction in the frame 33 (vehicle C side). The power transmission device 11 includes a detection rotating plate 52 attached to the bottom surface of the extending portion 51 in a rotatable state. The detection unit 50 is fixed to the bottom surface of the detection rotation plate 52 and rotates with the rotation of the detection rotation plate 52. When the detection unit 50 rotates with the vertical direction as the axial direction, the irradiation range S of the detection beam B has a fan shape when viewed from above in the vertical direction. The irradiation range S of the detection beam B is wider than the movable range of the power transmission unit 13. The irradiation range S of the detection beam B can be said to be a range in which the detection unit 50 can detect the pair of tires T1 and T2.

For convenience of explanation, a plane defined by the X direction and the Y direction with the detection unit 50 as an origin is defined as an XY plane.
Here, the detection unit 50 periodically detects the position by irradiating the detection beam B while rotating at a predetermined cycle regardless of whether or not the vehicle C is present in the vicinity. Specifically, the detection unit 50 irradiates the detection beam B at every predetermined scanning angle from one end to the other end in the circumferential direction of the irradiation range S and detects a reflected beam Br (hereinafter referred to as laser). (Referred to as scanning) once, the laser scanning is periodically performed. In this case, when the laser scan is performed a plurality of times, it can be said that the detection unit 50 irradiates the detection beam B a plurality of times in the same direction. Note that the scanning angle is, for example, an angle with respect to the X axis.

  As illustrated in FIG. 3, the detection unit 50 sequentially transmits a signal related to the detection result to the signal processing unit 60 provided in the power transmission device 11. Specifically, when detecting the reflected beam Br, the detection unit 50 transmits an effective signal including information related to the reflected beam Br as an effective value, and when detecting the reflected beam Br, an invalid signal is transmitted. Send. The information related to the reflected beam Br is information that can specify the distance from the detection unit 50 to the position detection target (for example, the time from when the detection beam B is irradiated until the reflected beam Br is detected).

  Each time the signal processing unit 60 receives a signal related to the detection result of the detection unit 50, the signal processing unit 60 derives information corresponding to the detection result of the detection unit 50, and the derived information is provided in the signal processing unit 60. A derivation unit 60b that sequentially stores the storage unit 60a in time series is provided. When the deriving unit 60b receives an effective signal, the deriving unit 60b derives the distance from the detection unit 50 to the position detection target based on the information regarding the reflected beam Br, and stores the information regarding the distance in the storage unit 60a. Further, when receiving the invalid signal, the deriving unit 60b stores, for example, an infinite value as an invalid value in the storage unit 60a.

  Here, as already described, the detection beam B is applied to the pair of tires T1 and T2, and the detection unit 50 detects the reflected beam Br from the pair of tires T1 and T2. For this reason, the deriving unit 60b derives the distance from the detecting unit 50 to the pair of tires T1 and T2 of the vehicle C.

  Further, the derivation unit 60b can grasp the rotation angle of the detection unit 50, specifically, the irradiation angle (scanning angle) of the detection beam B. Then, the deriving unit 60b associates the derived distance with the scanning angle from which the distance has been derived, and stores it in the storage unit 60a. That is, the deriving unit 60b derives the position of the pair of tires T1 and T2 as polar coordinates by associating the angle and the distance when the detection unit 50 is the origin, and stores the information in the storage unit 60a. .

  If attention is paid to deriving the distance from the detection unit 50 to the pair of tires T1 and T2 in a non-contact manner, the detection unit 50 and the deriving unit 60b are laser-type range sensors that derive the position in a non-contact manner. It can be said that there is.

  As shown in FIG. 3, the signal processing unit 60 calculates an average of a plurality of derived positions (coordinates) derived based on the reflected beam Br of the detection beam B irradiated a plurality of times in the same direction. And a second calculation unit 62 that calculates an average of a smaller number of derived positions than the first calculation unit 61. Each calculation unit 61, 62 calculates an average using a plurality of derived positions stored in the storage unit 60a.

  Further, the power controller 14 determines that the vehicle C has moved based on the calculation result of the position specifying unit 71 that specifies the position of the power receiving unit 23 based on the calculation result of the first calculation unit 61 and the calculation result of the second calculation unit 62. A movement determination unit 72 for determining whether or not the user is present.

  Hereinafter, these configurations will be described together with details of the derivation result of the derivation unit 60b. In the present embodiment, the detection target is the pair of tires T1 and T2, but since both are the same in terms of the derivation mode, only one tire T2 of the pair of tires T1 and T2 is described in the following description. explain.

  First, the detection mode by the detection unit 50 will be described. As shown in FIG. 4, the detection beam B is irradiated at every predetermined scanning angle. In this case, the detection beam B in a part of the range (for example, θ1 to θ7) is irradiated and reflected on the object (tire T2). Then, by associating the scanning angle with the distance, a plurality of (for example, seven) coordinates P1 to P7 are derived as polar coordinates. Needless to say, polar coordinates may be appropriately converted into XY coordinates. The number of derived coordinates is seven for convenience of explanation, but is not limited to this and is arbitrary. In the present embodiment, the coordinates P1 to P7 correspond to “a position of a power transmission target on which the power receiving device is mounted”.

  Here, even if the tire T2 is stopped, the derivation result (distance from the origin) of the derivation unit 60b varies. For example, as shown in FIG. 5, when the detection is performed a plurality of times at the first coordinate P1 where the angle with respect to the X axis is the first angle θ1 among the coordinates P1 to P7, the distance from the origin varies. Can occur.

  In such a configuration, the first calculation unit 61 calculates average coordinates from the number of samples (for example, nine) at the first coordinates P1. In this case, the latest sample is adopted. That is, among the plurality of samples related to the first coordinate P1 obtained within a predetermined time, assuming that Pt1 → Pt2 →... → Pt9 in order from the newest acquired timing, the first calculating unit 61 Average coordinates of these coordinates Pt1 to Pt9 are calculated. Each coordinate Pt1 to Pt9 corresponds to “a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times in the same direction”.

  The second calculation unit 62 calculates the average coordinates of a smaller number of samples (for example, three) than the first calculation unit 61. In this case, the latest sample is adopted. That is, the 2nd calculation part 62 calculates the average coordinate of each coordinate Pt1-Pt3, for example.

  The specific number of samples is arbitrary. In short, when the number of samples used by the first calculation unit 61 to calculate the average coordinates is m and the number of samples used by the second calculation unit 62 to calculate the average coordinates is n, m> n may be sufficient. In the following description, the average coordinates calculated by the first calculation unit 61 are referred to as first average coordinates, and the average coordinates calculated by the second calculation unit 62 are referred to as second average coordinates.

  The calculation units 61 and 62 calculate the average coordinates for each scanning angle at which the object is detected (scanning angle at which the reflected beam Br is detected). As a result, as shown in FIG. 6, the first calculating unit 61 calculates the first average coordinates P1m to P7m, and connecting the first average coordinates P1m to P7m makes a graph along the outer shape of the tire T2. It is formed. Further, as shown in FIG. 7, each of the second average coordinates P1n to P7n is calculated by the second calculator 62, and a graph along the outer shape of the tire T2 is formed by connecting the second average coordinates P1n to P7n. Is done. By forming a graph along the outer shape of the tire T2, the outer shape of the tire T2 can be estimated. Then, the center coordinates of the tire T2 can be calculated.

  The signal processing unit 60 derives a first center coordinate Pcm that is a center coordinate of the tire T2 based on each of the first average coordinates P1m to P7m in response to a request from the power supply side controller 14, and the first center coordinate Pcm. Is transmitted to the power supply side controller 14. Further, in response to a request from the power supply side controller 14, the signal processing unit 60 derives the second center coordinate Pcn that is the center coordinate of the tire T2 based on the second average coordinates P1n to P7n, and the second center. The coordinates Pcn are transmitted to the power supply side controller 14. The first central coordinate Pcm corresponds to “the position of the specific part derived based on the calculation result of the first calculation unit”, and the second central coordinate Pcn is “the specific determination derived based on the calculation result of the second calculation unit”. Corresponds to “position of the part”.

  Here, in terms of the number of samples, the first average coordinates P1m to P7m have higher accuracy than the second average coordinates P1n to P7n. Therefore, the first center coordinate Pcm derived using the calculation result of the first calculation unit 61 is more accurate than the second center coordinate Pcn derived using the calculation result of the second calculation unit 62. high. For this reason, as shown in FIGS. 6 and 7, the first center coordinate Pcm is closer to the true value Pcc, which is the actual center coordinate of the tire T2, than the second center coordinate Pcn. In FIG. 7, in order to clarify the difference from FIG. 6, the distortion of the straight line connecting the second average coordinates P1n to P7n and the deviation between the second center coordinates Pcn and the true value Pcc are exaggerated. Show.

  On the other hand, focusing on the time required for calculation, the second calculation unit 62 uses fewer samples for calculation than the first calculation unit 61, and therefore the second calculation unit 62 uses the first calculation unit. The time required for calculation is shorter than 61. For this reason, if each calculation part 61 and 62 starts calculation simultaneously, the 2nd center coordinate Pcn is calculated ahead of the 1st center coordinate Pcm.

  Incidentally, the calculation of the average of the derived positions (respective average coordinates P1m to P7m, P1n to P7n) and the calculation of the average of a plurality of distances at the same scanning angle are equivalent. For this reason, it can be said that each calculation part 61 and 62 is calculating the average of several derived distance in the same scanning angle. The derived distance at the same scanning angle is a distance derived based on the reflected beam Br of the detection beam B irradiated a plurality of times in the same direction.

  The position specifying unit 71 of the power supply side controller 14 is based on the first center coordinates Pcm (see FIG. 6) of the pair of tires T1 and T2 derived using the calculation result of the first calculation unit 61. The center coordinate Px (see FIG. 2) is specified. In this case, the vehicle-side controller 25 stores unique information 25a (see FIG. 1) for specifying the center coordinate Px of the power receiving unit 23 from the true value Pcc of the center coordinate of each tire T1, T2. When specifying the center coordinate Px of the power receiving unit 23, the position specifying unit 71 receives the unique information 25a from the vehicle-side controller 25, and obtains the unique information 25a and the first center coordinates Pcm of the pair of tires T1 and T2. The center coordinate Px of the power receiving unit 23 is specified by using this.

  The specific contents of the specific information 25a are arbitrary. For example, the distance between the true value Pcc of the center coordinate of one tire T1 and the center coordinate Px of the power receiving unit 23, and the center coordinate of the other tire T2. There is a distance between the true value Pcc of the power supply unit 23 and the center coordinate Px of the power receiving unit 23. In short, the unique information 25a is information relating to the positional relationship between the true value Pcc (position of the specific part) of the center coordinates of the tires T1 and T2 and the center coordinates Px of the power receiving unit 23.

  The movement determination unit 72 of the power supply side controller 14 determines whether or not the vehicle C is moving based on the second center coordinate Pcn of the tire T2 derived from the calculation result of the second calculation unit 62. Specifically, when the vehicle C is moving, the second center coordinate Pcn changes with time. The movement determination unit 72 determines the movement of the vehicle C based on the time change of the second center coordinate Pcn. In the following description, for the sake of convenience, the second center coordinate Pcn is simply indicated as Pcn (t) to indicate that the second center coordinate Pcn is a function of time.

  As shown in FIGS. 8A and 8B, when the tire T2 is moving, Pcn (ta), which is the second central coordinate Pcn at the timing of ta, and the second central coordinate at the timing of tb. Pcn (tb), which is Pcn, deviates. In this case, the movement determination unit 72 determines whether or not the distance δL between Pcn (ta) and Pcn (tb) is greater than or equal to a predetermined movement determination threshold, and the distance δL is equal to or greater than the movement determination threshold. If there is, it is determined that the vehicle C is moving. On the other hand, the movement determination unit 72 determines that the vehicle C is stopped when the distance δL is less than the movement determination threshold.

Incidentally, the interval between the timing of ta and the timing of tb is set to be longer than the time required for the second calculation unit 62 to calculate the second central coordinate Pcn.
Next, a series of charging processes executed by the power supply controller 14 will be described.

  As shown in FIG. 9, first, in step S <b> 101, the power supply controller 14 waits until the detection unit 50 detects the vehicle C (specifically, a pair of tires T <b> 1 and T <b> 2). Specifically, the power supply controller 14 requests the calculation result of the second calculation unit 62 and determines whether or not the calculation result of the second calculation unit 62 indicates the presence of the tires T1 and T2.

  Here, as already described, when detecting the reflected beam Br, the detection unit 50 transmits an effective signal including information related to the reflected beam Br. On the other hand, when the reflected beam Br is not detected, the detecting unit 50 transmits an invalid signal. Send. The deriving unit 60b derives a distance when a valid signal is received, and stores information on the distance in the storage unit 60a. When an invalid signal is received, the deriving unit 60b stores an invalid value (infinite value). Remember me. In this case, if an invalid value (infinite value) is set in at least one of the coordinates Pt1 to Pt3 used for calculation by the second calculation unit 62, the calculation result of the second calculation unit 62 is an invalid value (infinite value). ) On the other hand, if the coordinates Pt1 to Pt3 used for the calculation by the second calculation unit 62 are all valid values, the calculation result of the second calculation unit 62 is an effective value. The invalid value is not limited to an infinite value, and may be any value that can be an invalid value when averaged together with the valid value.

  In such a configuration, the power supply controller 14 determines that the tires T1 and T2 exist when the calculation result of the second calculation unit 62 in at least one direction is an effective value. In this case, the power supply controller 14 proceeds to step S102 assuming that the vehicle C is detected by the detection unit 50.

  In step S102, the power supply side controller 14 obtains the second center coordinate Pcn by requesting the signal processing unit 60, grasps the distance between the detection unit 50 and the tires T1, T2 from the second center coordinate Pcn, A distance correspondence process according to the distance is executed.

  Specifically, for example, when the distance is less than a predetermined lower limit value, the power supply side controller 14 notifies that the vehicle C is approaching using a predetermined notification unit. In addition, the specific structure of an alerting | reporting part is arbitrary, For example, the display part which can display a character etc., a speaker, etc. can be considered. Further, the notification by the notification unit may be performed only once, or may be performed continuously or intermittently until the distance becomes equal to or greater than the lower limit value.

Further, for example, when the distance is equal to or greater than a predetermined upper limit value, the power supply side controller 14 notifies the vehicle C to approach the power transmission device 11 side.
Thereafter, in step S103, the movement determination unit 72 of the power supply side controller 14 determines the movement of the vehicle C using the second center coordinates Pcn, and waits until the vehicle C stops.

  When it is determined by the movement determination unit 72 that the vehicle C is stopped, the power supply side controller 14 proceeds to step S104 and grasps the positions of the pair of tires T1 and T2. In this case, the power supply side controller 14 acquires the first center coordinates Pcm of the pair of tires T1 and T2 derived from the signal processing unit 60 based on the calculation result of the first calculation unit 61. Thereby, the power source controller 14 grasps the first center coordinates Pcm of the pair of tires T1 and T2.

  Thereafter, in step S105, the position specifying unit 71 of the power supply side controller 14 specifies the center coordinate Px of the power receiving unit 23 from the first center coordinates Pcm of the pair of tires T1, T2. In step S <b> 106, the power supply controller 14 calculates the target value of the power transmission unit 13 based on the center coordinates Px of the power reception unit 23. The target value is a movement value from the initial position for the power transmission unit 13 to be arranged at a position directly below the power reception unit 23. Specifically, the movement value is the rotation angle with respect to the reference line L1 when the rotation center line A is the origin, and the linear movement distance of the power transmission unit 13. Note that coordinate information of the initial position of the power transmission unit 13 is stored in a predetermined storage area of the power supply side controller 14, and the power supply side controller 14 calculates the coordinate information of the initial position when calculating the target value. Refer to

  Thereafter, the power supply controller 14 starts moving the power transmission unit 13 in step S107. Specifically, the power supply side controller 14 controls the linear motion drive unit 42 and the rotary motor 32 based on the target value so that the power transmission unit 13 is disposed immediately below the power reception unit 23.

  Here, during the movement of the power transmission unit 13, the power supply side controller 14 determines whether or not the power transmission unit 13 is arranged at the target position, that is, immediately below the power reception unit 23, in step S <b> 108. Specifically, the power transmission device 11 includes a rotation angle sensor that detects the rotation angle of the unit rotating plate 31 and a linear motion distance sensor that detects the linear motion distance of the other end in the extending direction of the arm portion 41. ing. The power supply side controller 14 confirms whether the power transmission unit 13 has rotated and linearly moved by the target value by acquiring the detection results of these sensors.

  Moreover, the movement determination part 72 of the power supply side controller 14 determines whether the vehicle C is moving in step S109 parallel to step S108. When the movement determination unit 72 determines that the vehicle C has moved, the power supply side controller 14 moves the power transmission unit 13 to the initial position in step S110 and returns to step S103. In step S110, the power supply controller 14 may notify the vehicle C to stop moving.

  When the power transmission unit 13 reaches the target position as a result of the power transmission unit 13 having moved by the target value, the power supply side controller 14 makes an affirmative determination in step S108 and stops the movement of the power transmission unit 13 in step S111. Thereafter, in step S112, the power supply controller 14 starts power transmission. Specifically, the power supply side controller 14 controls the AC power supply 12 so that AC power is output from the AC power supply 12.

During the transmission of AC power, the power supply side controller 14 executes the processes of step S113 and step S114 in parallel.
Specifically, in step S113, the power supply side controller 14 periodically acquires the charging state of the vehicle battery 22 from the vehicle side controller 25, and periodically determines whether or not the vehicle battery 22 is fully charged. To do.

  In step S114, the power supply side controller 14 periodically determines whether or not a predetermined forced stop condition is satisfied. As the forced stop condition, for example, a case where a forced stop switch is provided in the power transmission device 11 and the forced stop switch is operated can be considered.

Furthermore, the movement determination part 72 of the power supply side controller 14 performs the movement determination of the vehicle C in step S115 parallel to the process of these step S113 and step S114.
(A) When the vehicle battery 22 is fully charged, (B) when the forced stop condition is satisfied, or (C) when the vehicle C moves, the power supply side controller 14 transmits power in step S116. Stop. And in step S117, the power supply side controller 14 moves the power transmission unit 13 to an initial position.

  Thereafter, the power supply controller 14 stands by until the vehicle C exits in step S118. When the vehicle C leaves, that is, when the pair of tires T1 and T2 moves outside the irradiation range S of the detection beam B, the power supply controller 14 makes an affirmative determination in step S118 and proceeds to step S101. Return.

Next, the operation of this embodiment will be described.
For specifying the position (center coordinate Px) of the power receiving unit 23, the first center coordinate Pcm having relatively high accuracy is used. On the other hand, the second center coordinate Pcn calculated at a relatively high speed is used for the detection of the vehicle C and the movement determination by the movement determination unit 72.

According to the embodiment described in detail above, the following excellent effects are obtained.
(1) The power transmission device 11 includes a power transmission unit 13 (primary side coil 13a) to which AC power is input, and is AC in a non-contact manner with respect to the power reception device 21 including the power reception unit 23 (secondary side coil 23a). Electric power can be transmitted. The power transmission device 11 irradiates the detection beam B and detects the reflected beam Br of the detection beam B, and the position of the vehicle C on which the power reception device 21 is mounted based on the detection result of the detection unit 50. A deriving unit 60b for deriving (specifically, the coordinates P1 to P7) is provided. Thereby, since the position of the vehicle C can be detected without contacting a part of the vehicle C (for example, the tires T1, T2, etc.), the detection unit 50 is not easily obstructed, and the parking mode of the vehicle C The degree of freedom can be improved.

  In such a configuration, the power transmission device 11 calculates an average of a plurality of derived positions (specifically, the respective coordinates Pt1 to Pt9) derived based on the reflected beam Br of the detection beam B irradiated a plurality of times in the same direction. The first calculation unit 61 and the second calculation unit 62 that calculates an average of a smaller number of derived positions (specifically, the respective coordinates Pt1 to Pt3) than the first calculation unit 61 are provided. Thereby, for example, when a relatively high accuracy is required, the calculation result of the first calculation unit 61 is used, and when a relatively high-speed process is required, the calculation result of the second calculation unit 62 is used. The position of the vehicle C can be grasped according to the situation. Therefore, non-contact power transmission (power transmission) can be suitably performed.

  More specifically, in the case of adopting a non-contact type detection unit 50 from the viewpoint of difficulty in getting in the way and the degree of freedom of the parking mode, such as a decrease in position accuracy or false detection as compared with a contact type. Sometimes it is easy to happen. In this case, it is conceivable to use a highly accurate element or the like, but such a highly accurate element tends to be expensive.

  On the other hand, in the present embodiment, the derivation position derived by the derivation unit 60b is averaged, thereby realizing a reduction in variation, false detection, and the like due to a decrease in accuracy. However, in non-contact power transmission, high-accuracy position determination is required, or high-speed processing may be required to cope with the movement of the vehicle C or the like.

  Therefore, in the present embodiment, the power transmission device 11 includes the first calculation unit 61 and the second calculation unit 62 that calculate the average of the derived positions, and the number of samples related to the average calculation is relatively large. Yes. Thereby, non-contact electric power transmission can be performed suitably by selecting the calculation result employ | adopted according to a condition.

  (2) Based on the calculation result of the first calculation unit 61, center coordinates (first center coordinates Pcm) of the tires T1 and T2 are derived as specific parts of the vehicle C, the center coordinates, the center coordinates, and the power receiving unit. The position of the power receiving unit 23 is specified based on the unique information 25a that is information related to the positional relationship of the 23 (secondary coil 23a). Specifically, the position specifying unit 71 of the power supply controller 14 includes the first center coordinates Pcm of the pair of tires T1 and T2 derived based on the calculation result of the first calculation unit 61, and the center coordinates of the tires T1 and T2. The center coordinate Px of the power receiving unit 23 is specified based on the unique information 25a for specifying the center coordinate Px of the power receiving unit 23 from the true value Pcc. Thereby, the center coordinate Px of the power receiving unit 23 can be specified with high accuracy.

  (3) The power transmission device 11 includes the unit rotating mechanism 30 and the direct connection mechanism as a moving mechanism that moves the power transmission unit 13 (primary coil 13a) according to the position of the power receiving unit 23 specified as shown in (2) above. A moving mechanism 40 is provided. Thereby, alignment with the power transmission unit 13 and the power receiving unit 23 can be performed with high precision.

  (4) Based on the calculation result of the second calculation unit 62, it is determined whether or not the vehicle C exists within the irradiation range S of the detection beam B. Specifically, the power supply controller 14 requests the calculation result of the second calculation unit 62, and determines whether or not the calculation result of the second calculation unit 62 indicates the presence of the tires T1 and T2. More specifically, the derived position (coordinate or distance from the detection unit 50) is an effective value when the detection unit 50 detects the reflected beam Br, while the detection unit 50 does not detect the reflected beam Br. Is an invalid value. The invalid value is a value that is set to be an invalid value when averaged together with the valid value. And the power supply side controller 14 determines with the vehicle C existing in the irradiation range S of the detection beam B, when the calculation result of the 2nd calculation part 62 in at least one direction is an effective value. Accordingly, even if the vehicle C does not exist at a certain timing, even if the derived position becomes an effective value due to erroneous detection or the like, it is not erroneously determined that the vehicle C exists. Therefore, it is possible to improve the determination accuracy of whether or not the vehicle C exists.

  In particular, by using the calculation result of the second calculation unit 62 that is calculated at a relatively high speed in determining whether or not the vehicle C exists, the power source side controller after the vehicle C is arranged within the irradiation range S is used. The time lag until 14 grasps the vehicle C can be reduced.

  Further, the configuration for identifying the position of the power receiving unit 23 is used to determine whether or not the vehicle C is disposed nearby, thereby comparing the configuration in which a sensor or the like for detecting the vehicle C is separately provided. Can be simplified.

  (5) Based on the calculation result of the second calculation unit 62, the second center coordinate Pcn is derived as the specific part, and the movement determination of the vehicle C is performed based on the derived second center coordinate Pcn. Specifically, the movement determination unit 72 of the power supply side controller 14 determines whether or not the vehicle C is moving based on the time change of the second center coordinate Pcn. The time change of the second central coordinate Pcn is, for example, a distance δL between Pcn (ta), which is the second central coordinate Pcn at the timing of ta, and Pcn (tb), which is the second central coordinate Pcn at the timing of tb. . Thereby, the movement of the vehicle C can be grasped more suitably.

  More specifically, the interval between the timing of ta and the timing of tb needs to be longer than the time required for calculating the center coordinates to be subjected to movement determination. For this reason, if the time required to calculate the center coordinates becomes longer, it is necessary to increase the interval between the timings ta and tb. Then, for example, when the forward and backward movements are repeated, the distance δL may be less than the movement determination threshold value. In this case, it may be erroneously determined that the vehicle C is stopped even though the vehicle C is moving.

  On the other hand, the timing of ta and the timing of tb are adopted by adopting the second central coordinate Pcn derived from the calculation result of the second calculation unit 62 having a short calculation time as a parameter used for the movement determination. Can be shortened. Thereby, the improvement of the responsiveness of the movement determination part 72 can be aimed at, and the movement of the vehicle C can be tracked suitably. Therefore, the inconvenience can be suppressed.

In addition, you may change the said embodiment as follows.
The signal processing unit 60 is in the power transmission device 11, but is not limited thereto, and may be in the power reception device 21. In this case, the detection unit 50 transmits the detection result to the power supply controller 14. The power supply side controller 14 sequentially transmits the detection result of the detection unit 50 to the vehicle side controller 25. Thereby, the signal processing unit 60 can grasp the detection result of the detection unit 50. In this case, the signal processing unit 60 transmits the calculation results of the calculation units 61 and 62 or the central coordinates Pcm and Pcn to the vehicle-side controller 25. The vehicle-side controller 25 may transmit such information to the power supply-side controller 14, or the vehicle-side controller 25 may execute various processes in the charging process. At this time, the vehicle-side controller 25 may include a position specifying unit 71, a movement determining unit 72, and the like.

  (Circle) the calculation parts 61 and 62 may calculate a standard deviation about the sample number used as object, and may calculate average coordinates P1m-P7m and P1n-P7n only using the data in the standard deviation. Thereby, the improvement of the further precision can be aimed at.

The target detected by the detection unit 50 is not limited to the pair of tires T1 and T2 and may be any part of the vehicle C. For example, the body of the vehicle C may be used.
Although the center coordinates Pcm, Pcn of the pair of tires T1, T2 are derived as the positions of the specific parts, the present invention is not limited to this, and a structure in which the center-of-gravity coordinates are derived may be used. Moreover, a predetermined coordinate may be set as the position of the specific part in the quadrangle indicating the outer shape of the tires T1, T2, and a target value or the like may be calculated based on the position. Further, any one of the average coordinates P1m to P7m and P1n to P7n calculated by the calculation units 61 and 62 may be adopted as the specific part.

  Further, the specific part may be both corners in the width direction of the body, or may be both corners of the recess in which the number plate of the body is installed. In this case, the detection unit 50 may detect the body by laser scanning. Moreover, you may employ | adopt the arbitrary site | parts of the power receiving unit 23 as a specific site | part. In short, the specific part is an arbitrary part in the vehicle C including the power receiving unit 23.

O The specific part used for movement determination and the specific part used for specifying the position of the power receiving unit 23 may be different.
(Circle) the structure provided with the derivation | leading-out part 60b may be sufficient as the detection part 50. FIG. In this case, the detection unit 50 may transmit the distance derived by the deriving unit 60b and the angle from which the distance is derived to the signal processing unit 60 in association with each other.

A specific configuration for scanning the detection beam B is arbitrary. For example, instead of the detection rotating plate 52, a mirror that changes the irradiation direction of the detection beam B may be provided.
The irradiation range S of the detection beam B is fan-shaped, but is not limited to this and may be circular. In this case, the deriving unit 60b may extract only a detection result of a necessary range (for example, the movable range of the power transmission unit 13), and derive the distance using the extracted detection result.

  O Although the center of the power receiving unit 23 and the center of the secondary side coil 23a corresponded, it is not restricted to this and may shift | deviate. In this case, the unique information 25a may be set according to the center of the secondary coil 23a.

  In embodiment, although the power supply side controller 14 detected the vehicle C based on the calculation result of the 2nd calculation part 62 in step S101, it is not restricted to this. For example, the non-contact power transmission device 10 may be configured to detect the vehicle C based on the fact that wireless communication is possible between the controllers 14 and 25.

The center coordinate Px of the power receiving unit 23 is adopted as the position of the power receiving unit 23, but the present invention is not limited to this, and a position shifted from the center may be adopted.
The unit rotation mechanism 30 and the linear motion mechanism 40 may be omitted. In this case, the power transmission unit 13 may be installed at a position below the power reception unit 23 in the vertical direction that is assumed in consideration of a white line or a ring stopper provided on the installation surface G. In such a configuration, the non-contact power transmission device 10 (power supply side controller 14) specifies the position of the power receiving unit 23 based on the first central coordinates Pcm derived using the calculation result of the first calculation unit 61. Then, a determination process for determining whether or not the specified result is within a predetermined allowable range is executed. The non-contact power transmission apparatus 10 starts power transmission if the position of the power receiving unit 23 is within the allowable range, and stops charging as an error if the position of the power receiving unit 23 is out of the allowable range. Good. Thereby, the power transmission in the situation where the positional deviation between the power transmission unit 13 and the power receiving unit 23 is excessively large can be avoided.

  A specific configuration of the moving mechanism that moves the power transmission unit 13 is arbitrary. For example, an actuator capable of moving the power transmission unit 13 in the X and Y directions may be used, and an arm portion that can be expanded and contracted in the horizontal direction may be used to move the power transmission unit 13 directly.

  The control subject of the linear drive unit 42 and the rotary motor 32 is arbitrary. For example, the vehicle controller 25 may control the linear drive unit 42 and the rotary motor 32 via the power supply controller 14.

  O Although the primary side capacitor was provided in the power transmission unit 13, and the secondary side capacitor was provided in the power receiving unit 23, you may abbreviate | omit these. In this case, magnetic field resonance is performed using the parasitic capacitances of the coils 13a and 23a.

The resonance frequency of the resonance circuit of the power transmission unit 13 and the resonance frequency of the resonance circuit of the power reception unit 23 may be different as long as power transmission is possible.
○ Electromagnetic induction may be used to realize non-contact power transmission.

The AC power received by the secondary coil 23a may be used for purposes other than charging the vehicle battery 22.
O The power receiving device 21 may be mounted on any device, and may be mounted on a device other than the vehicle C such as a robot or an electric wheelchair.

  The power transmission unit 13 may have a configuration including a resonance circuit including a primary side coil 13a and a primary side capacitor, and a primary side coupling coil coupled to the resonance circuit by electromagnetic induction. Similarly, the power receiving unit 23 has a resonance circuit including a secondary coil 23a and a secondary capacitor, and a secondary coupling coil coupled to the resonance circuit by electromagnetic induction, and uses a secondary coupling coil. Then, AC power may be extracted from the resonance circuit of the power receiving unit 23.

  DESCRIPTION OF SYMBOLS 10 ... Non-contact electric power transmission apparatus, 11 ... Power transmission apparatus, 13 ... Power transmission unit, 13a ... Primary side coil, 14 ... Power supply side controller, 21 ... Power reception apparatus, 23 ... Power reception unit, 23a ... Secondary side coil, 25 ... Vehicle-side controller, 30 ... unit rotation mechanism, 40 ... linear motion mechanism, 50 ... detection unit, 60b ... derivation unit, 61 ... first calculation unit, 62 ... second calculation unit, 71 ... position specifying unit, 72 ... movement determination Part, B: detection beam, Br: reflected beam, S: detection beam irradiation range.

Claims (7)

In a power transmission device including a primary coil to which AC power is input and capable of transmitting the AC power in a contactless manner to a power receiving device having a secondary coil,
A detector for irradiating the detection beam and detecting a reflected beam of the detection beam;
Based on the detection result of the detection unit, a derivation unit for deriving the position of the power transmission target on which the power receiving device is mounted;
A first calculation unit that calculates an average of a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times in the same direction;
A second calculation unit that calculates an average of the derived positions of a smaller number than the first calculation unit;
A power transmission device comprising: Based on the calculation result of the first calculation unit, the position of the specific part of the power transmission target is derived,
The power transmission device according to claim 1, wherein the position of the secondary coil is specified based on the derived position of the specific part and information related to the positional relationship between the specific part and the secondary coil.   The primary coil is moved according to the position of the secondary coil specified based on the derived position of the specific part and information on the positional relationship between the specific part and the secondary coil. The power transmission device according to claim 2, further comprising a moving mechanism. The derivation position is an effective value when the detection unit detects the reflected beam, and is an invalid value when the detection unit does not detect the reflected beam.
The average of the invalid value and the valid value is the invalid value,
4. The method according to claim 1, wherein when the calculation result of the second calculation unit in at least one direction is the effective value, it is determined that the power transmission target exists within an irradiation range of the detection beam. The power transmission equipment described in 1. Based on the calculation result of the second calculation unit, the position of the specific part of the power transmission target is derived,
The power transmission target is determined to be moving when the time change of the derived position of the specific part is equal to or greater than a predetermined movement determination threshold value. Power transmission equipment. In a power receiving device capable of receiving the AC power in a contactless manner from a power transmitting device having a primary side coil to which AC power is input,
A derivation unit that derives a position of a power transmission target on which the power receiving device is mounted, based on a detection result of a detection unit that irradiates a detection beam and detects a reflected beam of the detection beam;
A first calculation unit that calculates an average of a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times in the same direction;
A second calculation unit that calculates an average of the derived positions of a smaller number than the first calculation unit;
A power receiving device comprising: A primary coil to which AC power is input;
A secondary coil capable of receiving the AC power in a non-contact manner from the primary coil;
In a non-contact power transmission device comprising:
A detector for irradiating the detection beam and detecting a reflected beam of the detection beam;
A derivation unit for deriving a position of a power transmission target on which the secondary coil is mounted based on a detection result of the detection unit;
A first calculation unit that calculates an average of a plurality of derived positions derived based on the reflected beam of the detection beam irradiated a plurality of times in the same direction;
A second calculation unit that calculates an average of the derived positions of a smaller number than the first calculation unit;
A non-contact power transmission device comprising: