JP6398584B2 - Non-contact power feeding device - Google Patents

Description

  The present invention is a non-contact power supply device that supplies power to a moving body, and in particular, sends power in a non-contact manner from a power supply device provided on a moving path to a power receiving apparatus provided on the moving body that moves on the moving path. The present invention relates to a non-contact power supply apparatus.

In the case of non-contact power feeding, if the positional relationship between the power feeding device and the power receiving device does not match, power feeding efficiency may be reduced. Continuing the power feeding operation in a state where the power feeding efficiency is reduced leads to wasteful power consumption. In order to prevent this, several methods for detecting the positional relationship have been proposed.
For example, Japanese Patent Application Laid-Open No. 2004-228561 has a method of detecting a positional relationship using a camera or light. However, since this method is installed outdoors, the detection accuracy may be reduced due to the influence of weather or dirt. Alternatively, in Patent Document 2, a magnetic method is also proposed, but when detecting a position at a distance, the detection accuracy decreases, so that the accuracy can be improved by performing signal processing using a plurality of sensors. Although possible, there are problems such as the complexity of the processing circuit and the processing time.

JP-A-8-237890 JP 2012-16106 A

  The present invention has been made in consideration of the above points, and an object thereof is to propose a non-contact power feeding device that can detect a positional relationship with high accuracy and stop a wasteful power feeding operation without being influenced by the weather.

The present invention relates to a non-contact power feeding device that is arranged along a moving path and feeds electric power in a non-contact manner to a power receiving device provided on the moving body. Vibration generating means for generating vibration within a predetermined frequency range, vibration detecting means for detecting the vibration generated by the movement of the moving body, and power supply to the moving body based on the detection result of the vibration detecting means And a power supply control means for controlling a power supply state and a power supply stop state to the moving body based on a determination result of the determination means.
According to the present invention, it is determined whether or not the moving body is within a range where power can be supplied by detecting vibration generated by the movement of the moving body, and the power supply state and the power supply stop state are controlled based on the determination result. Things are possible. As a result, when the moving body does not exist within the range where power can be supplied, it is possible to control the power supply to be stopped, and it is possible to prevent useless power supply operation.

  In addition, according to the present invention, since it is determined whether or not the moving object is within a power supply range using vibration, a method for detecting the moving object using a conventional camera or optical sensor is used. The contactless power feeding device that can prevent the problem of contamination and the deterioration of position detection accuracy due to the weather, and can control the power feeding state or the power feeding stop state with high accuracy and stop wasteful power feeding operation. Can be realized.

  The present invention is characterized in that vibration within the predetermined frequency range is generated by contacting at least a part of the moving body with the vibration generating means arranged along a moving path.

  According to the present invention, it is possible to reliably generate vibrations and to consciously generate vibrations having a predetermined frequency.

  According to the present invention, at least a part of the moving body is in contact with the vibration generating means arranged along a moving path, thereby generating vibration using air within the predetermined frequency range as a medium, and the vibration detecting means. Is characterized by detecting vibration using the air as a medium.

  According to the present invention, by detecting vibration using air as a medium, the vibration generating means and the vibration detecting means can be separated electrically and mechanically, and the degree of freedom of installation of the vibration detecting means is increased.

  In the present invention, the vibration generating means generates at least one signal of strain, pressure, displacement, and acceleration including a vibration component according to the weight of the moving body by the movement of the moving body. The vibration component included in the signal generated by the vibration generating means is detected.

  According to the present invention, it is possible to detect the vibration component by the vibration detection means, and prevent erroneous detection due to dust or foreign matter, which is a problem in the method of detecting a moving body using a conventional camera or optical sensor. It becomes possible to do. Further, it is possible to avoid a decrease in position detection accuracy due to dirt.

  In the present invention, the traveling direction of the moving body moving along the moving path is the X direction, the direction orthogonal to the X direction and parallel to the moving path is the Y direction, and the direction orthogonal to the X direction and the Y direction is the Z direction. The determination means determines whether the moving body is within a power feedable range due to vibration in at least one of the Y direction and the Z direction generated when the moving body moves on the moving path. It is characterized by things.

  According to the present invention, it is possible to eliminate noise generated in the installation environment by using vibrations in at least one of the Y direction and the Z direction, and the mobile object is present in a range where power can be supplied more reliably. It is possible to determine whether or not to do so.

  According to the present invention, it is possible to realize a non-contact power feeding device that can detect a positional relationship with high accuracy and stop a wasteful power feeding operation regardless of weather.

FIG. 1 is a block diagram showing a configuration of a non-contact power feeding apparatus according to the present invention. FIG. 2A is a top view showing the relationship between the non-contact power feeding device and the power receiving device according to the present invention. FIG. 2B is a side view showing the relationship between the non-contact power feeding device and the power receiving device according to the present invention. FIG. 3A is a top view showing a relationship between a non-contact power feeding device and a power receiving device according to another example of the present invention. FIG. 3B is a side view showing a relationship between the non-contact power feeding device and the power receiving device according to another example of the present invention. FIG. 4A is a top view showing the relationship between the vibration generating means according to another example of the present invention, the vibration detecting means, and at least a part of the structure provided on the moving body in contact with the vibration generating means. FIG. 4B is a side view showing the relationship between the vibration generating means according to another example of the present invention, the vibration detecting means, and at least a part of the structure provided on the moving body in contact with the vibration generating means. FIG. 5A is a top view showing the relationship between the vibration generating means according to another example of the present invention, the vibration detecting means and at least a part of the structure provided on the moving body in contact with the vibration generating means. FIG. 5B is a side view showing the relationship between the vibration generating means according to another example of the present invention, the vibration detecting means, and at least a part of the structure provided on the moving body in contact with the vibration generating means.

Hereinafter, embodiments according to the present invention will be described in detail with reference to the drawings.
(First embodiment)

FIG. 1 is a diagram illustrating in detail the configuration of the non-contact power feeding device according to the first embodiment.
The non-contact power supply apparatus 100 includes vibration generation means 101, vibration detection means 102, determination means 103, power supply control means 104, and non-contact power supply means 105. The vibration generating unit 101 generates vibration within a predetermined frequency range by contacting at least a part of the structure 12 of the moving body when the moving body moves. The vibration detection unit 102 detects vibration within a predetermined frequency range generated by the vibration generation unit 101. The determination unit 103 is electrically connected to the vibration detection unit 102 and determines whether the vibration detected by the vibration detection unit 102 includes a vibration within a predetermined frequency range. More specifically, the determination unit 103 determines that the moving body 10 is within a power feedable range if vibration within a predetermined frequency range is included, and if vibration within the predetermined frequency range is not included. It determines with the mobile body 10 not being in the range which can supply electric power. The power supply control unit 104 is electrically connected to the determination unit 103. If the determination unit 103 determines that the moving body 10 is within a power supply range according to the result of the determination unit 103, the non-contact power supply is performed. The means 105 is controlled to be in a power supply state, and when the determination means 103 determines that the moving body 10 is not within the range where power can be supplied, the non-contact power supply means 105 is controlled to be in a power supply stop state. The non-contact power supply means 105 converts the electric-electromagnetic field supplied to the power receiving apparatus 200 by converting electric power supplied from the outside into an electromagnetic field.

  The moving body 10 is provided with a power receiving device 200 including a non-contact power receiving means 201 for receiving an electromagnetic field generated by the non-contact power feeding means 105, and further contacts with the vibration generating means 101 to be within a predetermined frequency range. At least a part of the structure 12 of the moving body that generates vibration is included. The vibration generating means 101 and the vibration detecting means 102 can transmit vibrations through various media depending on the type of vibration and the detecting means method, and are not limited to electrical signals or mechanical connections.

  2A and 2B are diagrams schematically showing the non-contact power feeding apparatus 100 according to the first embodiment. In the non-contact power supply apparatus 100 according to the first embodiment, the non-contact power supply apparatus 100 is installed along a moving path 20 in which the moving body 10 and the moving body 10 move (run or advance). 2A and 2B, only the vibration generating unit 101 and the non-contact power feeding unit 105 of the non-contact power feeding apparatus 100 are illustrated.

  A mechanism in which the non-contact power supply apparatus 100 is in a power supply state and a power supply stop state will be described with reference to FIG. 2A. FIG. 2A is a view of the moving body 10 moving along the moving path as viewed from above, and the power supply possible range in this embodiment is the non-contact power supply means included in the non-contact power supply apparatus 100 in FIG. In contrast, the position of the non-contact power receiving means 201 included in the power receiving device 200 installed in the moving body 10 is in the state of being in the area of the non-contact power feeding means 105 in the X direction and the Y direction. In addition, even a part of the non-contact power receiving unit 201 is out of the area where the power can be supplied from the area of the non-contact power supply unit 105.

  When the positional relationship between the non-contact power feeding device 100 and the power receiving device 200 and at least a part of the structural body 12 installed in the moving body 10 is moving within a range where the moving body 10 can feed power. At least a part of the structure 12 of the moving body comes into contact with the vibration generating means 101, and vibration within a predetermined frequency range is generated. At this time, the non-contact power feeding means 105 and the non-contact power receiving means 201 are It is in a range where power can be supplied.

  The method for determining the power supply range of the power receiving device 200 with respect to the non-contact power supply device 100 determines the positions in the X direction and Y direction of at least a part of the structure 12 of the moving body with respect to the center position of the non-contact power receiving means 201. Next, the X-direction and Y-direction dimensions of the vibration generating means 101 with respect to the center position of the non-contact power supply means 105, that is, the length and width are set to coincide with the power supply range.

  Further, regarding the power supply range in the X direction, the moving speed of the moving body, the delay time until the non-contact power supply apparatus 100 reaches the power supply state from the power supply stop state, and the power supply start state reaches the power supply stop state. It is also possible to determine the length of the vibration generating means in the X direction in consideration of the delay time until.

  However, when the moving body 10 is out of the power supply range, the vibration generating means 101 and at least a part of the structure 12 of the moving body are not in contact with each other, and vibration within a predetermined frequency range is not generated. The contact power supply device 100 is in a power supply stop state, and power is not supplied to the moving body.

  Thereby, when the moving body 10 is in a predetermined power supply range with respect to the non-contact power supply device 100, the non-contact power supply device 100 performs a power supply operation, and other states, that is, out of the power supply range. When the power is on, the power supply is stopped. For example, by setting the power transmission efficiency from the non-contact power feeding apparatus 100 to the power receiving apparatus 200 within a range where power can be fed when the power transmission efficiency is within a range of 80% or more or 90% or more, a range where the power transmission efficiency is low Then, it is possible to stop the power supply, and it is possible to stop the useless power supply operation.

  Here, the operation will be described by taking the vibration in the audible region in the vibration using air as a medium, that is, the sound as an example.

  2A and 2B, the moving body 10 moves in the X direction along the moving path 20, and the moving body 10 is approaching the power supply range of the non-contact power supply apparatus 100. In this state, at least a part of the structure 12 of the moving body is not in contact with the vibration generating means 101, no vibration within a predetermined frequency range is generated, and the non-contact power supply apparatus 100 is in a power supply stop state. .

  When the moving body moves in the X direction and enters the power feeding range in the X direction and the Y direction with respect to the non-contact power feeding apparatus 100, at least a part of the structural body 12 of the moving body contacts the vibration generating means 101. Then, a sound having a vibration with a predetermined frequency is generated. The sound is detected by the vibration detection unit 102, and the determination unit 103 determines whether the vibration is within a predetermined frequency range. In this case, it is determined that the vibration is within the predetermined frequency range, and it is determined that the moving body 10 is within the power supply range. In response to this, the power supply control means turns the non-contact power supply means 105 into a power supply operation and starts power supply to the moving body.

  Thereafter, when the moving body deviates from the power feeding range in the X direction or the Y direction with respect to the non-contact power feeding device 100, the vibration generating means 101 and at least a part of the structure 12 of the moving body are in contact with each other. Since there is no vibration within the predetermined frequency range, the determination unit 103 determines that vibration within the predetermined frequency range is not included, and determines that the moving body 10 is out of the power supply range. In response to this, the power supply control means 104 controls the non-contact power supply means 105 to a power supply stop state.

  In the first embodiment, the above-described operation has been described. However, each unit is not limited to the above description. For example, the vibration detection unit 102 that detects vibration is generated by the vibration generation unit 101. What is necessary is just to install in the place which can detect a vibration, for example, you may install in a right angle direction on a moving path or a moving path. Further, the vibration detection unit 102 does not detect the direct vibration generated from the vibration generation unit 101 but may detect the vibration reflected by another object, and is limited to whether the vibration generation unit 101 is near or far. However, it may be installed in a place where vibration can be detected, and there are no particular restrictions on the installation location.

  The vibration detection unit 102 only needs to be capable of detecting vibration within a predetermined frequency range, and a part of vibration within the predetermined frequency range is detected by one vibration detection unit 102, and a plurality of vibration detection units 102 are used. By doing so, it is also possible to detect vibration within a predetermined frequency range by the plurality of vibration detecting means 102, and vibration detection can be made more reliable.

Furthermore, when vibration within the predetermined frequency range is detected by the vibration detection means 102, it is possible to output a processed result instead of outputting a simple vibration detection result. For example, analog output conversion indicating which frequency within a predetermined frequency range is detected, conversion to digital output, and the like are possible. High output can be achieved.

The determination means 103 and the power supply control means 104 are electrically connected, and the power supply control means 104 receives the result of determining whether or not the moving body 10 is in a power supplyable range by the determination means 103, and the state of the non-contact power supply means 105 is determined. Set the power supply state or power supply stop state. In this case, the contactless power feeding means 105 may be put into a power supply state or a power supply stop state immediately after vibration within a predetermined frequency range is detected. However, after vibration within a predetermined frequency range is input within a predetermined time, The power supply may be stopped. Note that the determination unit 103 may be incorporated in the vibration detection unit 102 or the power supply control unit 104.
(Second Embodiment)

  FIG. 3A, FIG. 3B, FIG. 4A, FIG. 4B, FIG. 5A and FIG. 5B are diagrams schematically showing the non-contact power feeding apparatus 100 in the second embodiment.

  When the moving body moves, the non-contact power feeding apparatus 100 is such that at least a part of the structures 12a and 12d of the moving body comes into contact with the vibration generating means 101a and 101b that generate vibrations in a predetermined frequency range. The vibration in a predetermined frequency range is generated. Here, at least a part of the structures 12a and 12d of the moving body is an example using a tire that is a structure that is in contact with a moving path that the moving body originally has.

  The vibration detection means 102a and 102b are provided below the vibration generation means 101a and 101b. When the moving body structures 12a and 12d are placed on the vibration generation means 101a and 101b, vibration is generated by the weight of the movement body 10. Physical changes such as strain, pressure, displacement, and acceleration occur in the means 101a and 101b. Vibration detection means 102a and 102b detect vibrations caused by the physical change. For example, in the case of strain, when vibration is caused by a physical change, when a load is applied to the vibration generating means 101a and 101b, distortion is generated in the vibration generating means 101a and 101b. A signal indicating the amount of distortion at that time is a distortion amount. A waveform having a peak value or a vibration (frequency) component is observed due to the change of, and this is a vibration of a waveform having a vibration (frequency) or a vibration component when the peak value changes. In this case, the vibrations generated by the vibration generating means 101a and 101b may be generated with different frequencies within the predetermined frequency range, or some of them may be synthesized frequencies including the same frequency. It is sufficient that the part also includes vibration within a predetermined frequency range.

  When detecting vibration using air as a medium in FIGS. 3A and 3B, the vibration generating means 101a and 101b generate different frequencies within a predetermined frequency range, and the determination means 103 generates vibration generated by the vibration generating means 101a and 101b. Is detected at the same time, it can be determined that it is within the power supply possible range, and in response to this, the power supply control means 104 can put the non-contact power supply means into a power supply state.

  4A and 4B show the positional relationship between the vibration generating means 101a, the vibration detecting means 102a and the tire 12a which is at least a part of the structure of the moving body 10 shown in FIGS. 3A and 3B. FIG. 3 is an enlarged view of a vibration generation unit 101a, a vibration detection unit 102a, and a tire 12a that is at least a part of the structure of the moving body 10 when the power receiving device 200 provided in the moving body 10 is in a range of a power supply state. . 4A, 4B, 5A, and 5B, the X direction, the Y direction, and the Z direction indicate the traveling direction of the moving body 10 that moves along the moving path 20, as in FIGS. 3a and 3b. A direction perpendicular to the X direction and the X direction and parallel to the moving path 20 is a Y direction, and a direction orthogonal to the X direction and the Y direction is a Z direction. 5A and 5B show an example in which the vibration detection unit 102a is provided on the side surface (surface orthogonal to the Y direction) of the vibration generation unit 101a.

  4A and 4B, when the moving body 10 enters the power supply range of the vibration generating means 101a, the tire 12a has a vibration generating means 101a depending on the weight of the moving body 10 relative to the vibration generating means 101a. Is applied with at least one of strain, pressure, displacement, and acceleration in the Z direction. The vibration detection unit 102a is installed below the Z direction of the vibration generation unit 101a, and detects a vibration component of a signal including at least one of strain, pressure, displacement, and acceleration generated by the vibration generation unit 101a. The power supply control means 104 sets the non-contact power supply means 105 to the power supply state or the power supply stop state based on the result of determination by the determination means 103 as to whether or not the power supply is possible. It is possible to determine whether the power supply is out of the power supply range. If the power supply is out of the power supply range, the useless power supply operation can be stopped.

  5A and 5B, when the moving body 10 enters the power supply range of the vibration generating means 101a, the tire 12a has a vibration generating means 101a depending on the weight of the moving body 10 relative to the vibration generating means 101a. At least one of strain, pressure, displacement, and acceleration in the Y direction. The vibration detection unit 102a is installed in the Y direction, that is, on the side surface of the vibration generation unit 101a, and detects and determines at least one of the distortion, pressure, displacement, and acceleration generated by the vibration generation unit 101a. The power supply control means 104 sets the non-contact power supply means 105 to the power supply state or the power supply stop state based on the result of determining whether the power supply range is out of the power supply possible range or not by the means 103. It is possible to determine whether the power supply is out of the possible range. When the power supply is out of the power supply possible range, it is possible to stop useless power supply operation.

  The vibration generating means 101a may be any material that generates a vibration in a predetermined frequency range in the Z direction or the Y direction by a load or contact with the tire 12a. At least the elastic coefficient in the Z direction and the Y direction of the vibration generating means 101a, the tire It suffices if vibration within a predetermined frequency range is generated by the surface roughness of the surface in contact with 12a.

  The vibration detection unit 102a of the present embodiment detects only vibrations in one direction in the Y direction and the Z direction, but at least one of strain, pressure, displacement, and acceleration in the Y direction or the Z direction and the other direction. It is also possible to detect a vibration component of a signal including two.

  For example, the vibration component of the two-dimensionally synthesized signal due to strain, pressure, displacement, acceleration, etc. generated by the vibration generating means 101a such as Y direction and Z direction, Y direction and X direction, Z direction and X direction, etc. can be detected. , Detecting the vibration component of the signal after being decomposed into each directional component of the two-dimensional composite signal, or detecting the vibration component of the three-dimensional composite signal in the Y direction, the Z direction, and the X direction, and the directional component of the composite signal. The vibration component of the decomposed signal may be detected. By using the vibration component of the signal having a directional component having at least the Y direction or the Z direction or the vibration component of the signal decomposed into each directional component as a determination criterion in the determination unit 103, the direction of vibration in a predetermined frequency range is determined. It is easy to eliminate noise generated in the installation environment where this wireless power supply device is installed, and the mobile object is reliably within the power supply range. It becomes possible to determine whether or not.

  Further, any one of vibration detection means 102a or a plurality of vibration detection means 102a of strain, pressure, displacement, and acceleration may be combined to make a suitable attachment for detecting vibration. There is no limit. For example, it is also possible to detect vibrations in a plurality of directions with one vibration detection means 102a and to detect in one direction with a plurality of vibration detection means 102a. Moreover, although the example which comprised the vibration detection means 102a by one thing was described, it may be divided | segmented into multiple and is not limited to this example.

  4A, FIG. 4B, FIG. 5A, and FIG. 5B do not describe the determination unit 103. However, the determination unit 103 may be integrated with the vibration detection unit 102a or installed separately from the vibration detection unit 102a. It may be integrated with the means 104 as long as it is electrically connected so that it can receive the detection signal of the vibration detecting means 102a. Further, one or more outputs of the vibration detection means 102a can be provided for one determination means 103, and one or a plurality of detection means 102a and 102b described in FIGS. 3A and 3B can be provided. It is possible to make the determination by the determination means 103, or the determination means 103 corresponding to each of the detection means 102a and 102b, and is not limited to that described in the present embodiment.

  In this embodiment, an example in which the tires 12a and 12b of the moving body 10 are used for at least a part of the structure 12 of the moving body 10 is described. The structure may be provided in the structure of the moving body 10 or the power receiving device 200 installed in the moving body 10 as long as it is in contact with the vibration generating means 101 that generates vibration within a predetermined frequency range. When the positions of the non-contact power supply device 100 and the power receiving device 200 are within the power supplyable range, the vibration generator 101 and at least a part of the structure 12 of the moving body 10 may be in contact with each other to generate vibration in a predetermined frequency range. However, the present invention is not limited to those described in this embodiment.

  Although Embodiment 1 and Embodiment 2 have been described by taking an automobile as an example of a moving body, the moving body is not limited to an automobile. For example, a moving body that operates on a plane or a curved surface as a moving path may be used, or a power feeding device for a moving body that moves in a direction other than parallel to the ground may be used. For example, trains and trams that move along the track, bicycles that the operator can move freely, light vehicles such as two-wheeled vehicles, large vehicles such as large vehicles and special work vehicles, carts that move (run) within a limited site, The present invention may be applied to a moving body including a vehicle, an aircraft, etc., and a power feeding device to a moving body such as an elevator, a cable car, and a linear scale, and is not limited to the example described herein.

  It becomes possible to efficiently supply electric power to a moving body moving along a moving path in a non-contact manner.

DESCRIPTION OF SYMBOLS 10 Moving body 12 Structure 20 Moving path 100 Non-contact electric power feeder 101 Vibration generation means 102 Vibration detection means 103 Judgment means 104 Electric power feeding control means 105 Non-contact electric power feeding means 200 Power receiving apparatus 201 Non-contact electric power receiving means

Claims (4)

In a non-contact power feeding device that is arranged along a moving path and feeds power in a non-contact manner to a power receiving device provided in a moving body,
Vibration generating means arranged along a moving path and generating vibration within a predetermined frequency range when the moving body moves;
Vibration detecting means for detecting the vibration generated by the movement of the moving body;
A determination unit that determines whether the moving body is within a power feedable range based on a detection result of the vibration detection unit;
A power supply control means for controlling a power supply state and a power supply stop state to the moving body based on a determination result of the determination means ,
The vibration generating means is provided at a position in contact with at least a part of the moving body when the moving body is moving within a power feedable range,
A contactless power feeding device that generates vibration within the predetermined frequency range by contacting at least part of the moving body with the vibration generating means arranged along a moving path. . At least a part of the moving body is in contact with the vibration generating means disposed along the moving path, thereby generating vibration using air within the predetermined frequency range as a medium,
The non-contact power feeding apparatus according to claim 1 , wherein the vibration detection unit detects vibration using the air as a medium. The vibration generating means generates at least one signal of strain, pressure, displacement, and acceleration including a vibration component according to the weight of the moving body by the movement of the moving body,
The non-contact power feeding apparatus according to claim 1 , wherein the vibration detection unit detects a vibration component included in a signal generated by the vibration generation unit. When the traveling direction of the moving body moving along the movement path is the X direction, the direction perpendicular to the X direction and parallel to the movement path is the Y direction, and the direction perpendicular to the X direction and the Y direction is the Z direction. The determination means determines whether the moving body is within a power supplyable range by vibration in at least one of the Y direction and the Z direction generated when the moving body moves on the moving path. The non-contact power feeding device according to any one of claims 1 to 3 .

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