Abnormality determination system

Abstract

The present invention provides an abnormality determination system for detecting an abnormality of a power transmission device. An abnormality determination device (1) for determining an abnormality of a power transmission device (2) provided on a road includes a processing unit (13), a server communication unit (11) capable of communicating with a plurality of mobile bodies (4) each having a power receiving device, and a storage unit (12) that stores power receiving history information received from the mobile bodies (4). The power receiving history information is information including a power receiving location and power receiving power received by the power receiving device or a power transmission efficiency (η real ) calculated based on the power receiving power. Further, the processing unit (13) is configured to extract information on a power receiving location where the power transmission efficiency (η real ) is less than a predetermined value (η1) from the power receiving history information of the plurality of mobile bodies (4) stored in the storage unit (12), and is configured to determine an abnormality of the power transmission device (2) based on the extracted information on the power receiving location.

Description

Technical Field

[0001] The present invention relates to an abnormality determination device and an abnormality determination method. Background Art

[0002] In Patent Document 1, as a conventional in-motion wireless power supply system (Dynamic Wireless Power Transfer System), a structure is disclosed in which the difference in the battery charge amount before and after the vehicle passes through an electrified road (a road provided with a power transmission device) is calculated, and if the difference in the battery charge amount is equal to or greater than a predetermined value, the electrified road through which the vehicle has passed is determined to be an electrified road that may cause deterioration of the battery.

[0003] Prior Art Documents

[0004] Patent Document 1: Japanese Patent Application Laid-Open No. 2019-158379 Summary of the Invention

[0005] Problems to be Solved by the Invention

[0006] In an in-motion wireless power supply system, an abnormality in the power transmission device affects all the power receiving devices (vehicles) mounted on the electrified road provided with the power transmission device. Therefore, it is required to be able to detect an abnormality in the power transmission device. However, the in-motion wireless power supply system has the following problem: when an abnormality occurs in the power transmission from the power transmission device to the power receiving device, it is necessary to determine whether the cause of the abnormality lies in the power transmission device or the power receiving device.

[0007] The present invention has been made in view of such a problem, and an object thereof is to detect an abnormality in the power transmission device and its installation location.

[0008] Means for Solving the Problems

[0009] To solve the above problems, according to an aspect of the present invention, there is provided an abnormality determination device that determines an abnormality in a power transmission device provided on a road. The abnormality determination device according to an aspect of the present invention includes a processing unit, a communication unit capable of communicating with a plurality of moving bodies each having a power receiving device that receives wireless power from the power transmission device, and a storage unit that stores power receiving history information received from the moving bodies. The power receiving history information is information including the power receiving location of the power received by the power receiving device and the power receiving power or the power transmission efficiency calculated based on the power receiving power. The processing unit is configured to extract information on the power receiving location where the power transmission efficiency is less than a predetermined value from the power receiving history information of the plurality of moving bodies stored in the storage unit, and is configured to determine an abnormality in the power transmission device based on the extracted information on the power receiving location.

[0010] In addition, according to a certain aspect of the present invention, there is provided an abnormality determination method for determining an abnormality of a power transmission device provided on a road. The abnormality determination method according to a certain aspect of the present invention includes the following steps: a step of collecting power reception history information by communicating with a plurality of moving bodies each having a power reception device that receives power wirelessly transmitted from the power transmission device, the power reception history information including the power reception location of the power received by the power reception device and the power reception power or the power transmission efficiency calculated based on the power reception power; a step of extracting information on the power reception location where the power transmission efficiency is less than a predetermined value from the collected power reception history information; and a step of determining the abnormality of the power transmission device based on the extracted information on the power reception location.

[0011] Advantages of the Invention

[0012] According to these aspects of the present invention, it is possible to detect an abnormality of the power transmission device and its installation location. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of a wireless power supply system during travel.

[0014] Figure 2 is a diagram for explaining the detailed structures of the power transmission device and the vehicle according to the first embodiment of the present invention.

[0015] Figure 3 is a flowchart for explaining the content of the process executed between each vehicle and the server in order to collect the power reception history information of each vehicle to the server.

[0016] Figure 4 is a flowchart for explaining the content of the process executed in the server in order to detect an abnormality of the power transmission device.

[0017] Figure 5 is a flowchart for explaining the details of the abnormality detection process according to the first embodiment of the present invention.

[0018] Figure 6 is a flowchart for explaining the content of the process executed by the server when an abnormality of the power transmission device is detected and the content of the process executed in each vehicle accordingly.

[0019] Figure 7 is a diagram for explaining the detailed structures of the power transmission device and the vehicle according to the second embodiment of the present invention.

[0020] Figure 8 is a flowchart for explaining the content of the process according to the present invention executed in each power transmission device in order to detect an abnormality of the foreign object detection device and the content of the process executed in the server accordingly.

[0021] Figure 9It is a flowchart for explaining the content of the processing executed in each power transmission device to detect an abnormality in the living body protection device and the content of the processing executed in the server accompanying this.

[0022] Figure 10 It is a flowchart for explaining the details of the abnormality detection processing of the second embodiment of the present invention. Detailed Embodiment

[0023] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In addition, in the following description, the same constituent elements are denoted by the same reference numerals.

[0024] (First Embodiment)

[0025] Figure 1 It is a schematic configuration diagram of the in - motion wireless power supply system 100 according to the first embodiment of the present invention.

[0026] The in - motion wireless power supply system 100 of the present embodiment includes: a server 1, a plurality of power transmission devices 2 continuously arranged at a predetermined interval along a road, a power supply device 3 for supplying power to each power transmission device 2, and a plurality of vehicles 4 equipped with a power receiving device 5 (refer to Figure 2 ) for receiving wirelessly transmitted power from the power transmission device 2. In addition, in the following description, the road on which the power transmission device 2 is provided is referred to as an "electrified road" as needed.

[0027] The server 1 includes: a server communication unit 11, a server storage unit 12, and a server processing unit 13.

[0028] The server communication unit 11 has a communication interface circuit for connecting the server 1 to the network 6 via, for example, a gateway, and is configured to be able to communicate with the vehicle 4 mutually.

[0029] The server storage unit 12 has storage media such as an HDD (Hard Disk Drive), an optical recording medium, and a semiconductor memory, and stores various computer programs and data used in the processing in the server processing unit 13.

[0030] The server processing unit 13 has one or more processors and their peripheral circuits. The server processing unit 13 executes various computer programs stored in the server storage unit 12 and comprehensively controls the overall operation of the server 1. For example, it is a CPU (Central Processing Unit). Regarding the processing further implemented by the server processing unit 13 and thus the server 1, refer to Figures 3 to 6 which will be described later.

[0031] Figure 2This is a diagram for explaining the detailed structure of the power transmission device 2 and the vehicle 4 of the present embodiment.

[0032] The power transmission device 2 includes: a power transmission resonator 21, a power transmission circuit 22, a power transmission side receiver 23, a foreign object detection device (Foreign Object Detection Device), 24, a living object protection device (Living Object Protection Device) 25, and a power transmission control device 20. The power transmission circuit 22, the power transmission side receiver 23, the foreign object detection device 24, and the living object protection device 25 are connected to the power transmission control device 20 via an internal network 28 in the power transmission device 2 that complies with standards such as CAN (Controller Area Network).

[0033] The power transmission resonator 21 is a resonant circuit including a power transmission coil, and is configured to resonate at a predetermined resonant frequency f 0 resonate. A power reception resonator 51 corresponding to the power transmission resonator 21 is provided in the vehicle 4. The power reception resonator 51 is a resonant circuit including a power reception coil, and is configured to resonate at the same resonant frequency f as the power transmission resonator 21 0 resonate. By making the power transmission resonator 21 resonate, the power transmission coil of the power transmission resonator 21 and the power reception coil of the power reception resonator 51 arranged spaced apart in space are magnetically coupled, and power transmission (wireless power supply) from the power transmission device 2 to the power reception device 5 is performed.

[0034] The power transmission circuit 22 is a circuit including a converter, and is configured to be able to convert the DC power supplied from the power supply device 3 into desired AC power based on a control signal from the power transmission control device 20 and supply it to the power transmission resonator 21. A power transmission side current sensor 26 for detecting the current flowing into the power transmission resonator 21 (hereinafter referred to as "power transmission side current") I1 and a power transmission side voltage sensor 27 for detecting the voltage applied to the power transmission resonator 21 (hereinafter referred to as "power transmission side voltage") V1 are provided in the power transmission circuit 22. The power transmission side current I1 and the power transmission side voltage V1 detected by each sensor 26, 27 are respectively input to the power transmission control device 20.

[0035] The power transmission side receiver 23 performs wireless communication with the power reception side transmitter 53 mounted on each vehicle 4 using a predetermined wireless communication line, and receives a proximity signal transmitted from the power reception side transmitter 53. The proximity signal is a signal for notifying that the vehicle 4 is approaching the power transmission device 2, and is a signal for urging the power transmission device 2 that has received the proximity signal to prepare for power transmission.

[0036] The foreign object detection device 24 detects metallic foreign objects present on the road between the power transmission device 2 and the power reception device 5. This is because when power is transmitted from the power transmission device 2 to the power reception device 5 while there is a metallic foreign object in the space between the power transmission device 2 and the power reception device 5, the metallic foreign object may be heated and the power transmission efficiency may decrease. The foreign object detection device 24 sends foreign object detection information indicating whether there is a metallic foreign object to the power transmission control device 20 according to a request from the power transmission control device 20. The method for detecting metallic foreign objects by the foreign object detection device 24 is not particularly limited, and various known methods such as detection based on a metal detector can be used.

[0037] The living thing protection device 25 detects living things (such as people, animals, etc.) present around the power transmission device 2. This is because when the power transmission device 2 is driven while there are living things around the power transmission device 2, the living things will be exposed to the leakage magnetic field from the power transmission device 2, which may have an impact on health. The living thing protection device 25 sends living thing detection information indicating whether there are living things to the power transmission control device 20 according to a request from the power transmission control device 20. The method for detecting living things by the living thing protection device 25 is not particularly limited, and various known methods such as image recognition can be used.

[0038] The power transmission control device 20 includes: a communication interface 201, a storage unit 202, and a power transmission processing unit 203.

[0039] The communication interface 201 is a communication interface circuit for connecting the power transmission control device 20 to the internal network 28 in the power transmission device 2.

[0040] The storage unit 202 has storage media such as an HDD, an optical recording medium, and a semiconductor memory, and stores various computer programs and data used in the processing by the power transmission processing unit 203.

[0041] The power transmission processing unit 203 has one or more processors and their peripheral circuits. The power transmission processing unit 203 executes various computer programs stored in the storage unit 202 to comprehensively control the power transmission device 2, and is, for example, a CPU.

[0042] Furthermore, when the power transmission processing unit 203 of the power transmission control device 20 receives a proximity signal via the power transmission side receiver 23, for example, it drives the foreign object detection device 24 and the living thing protection device 25 to obtain foreign object detection information and living thing detection information. And when the power transmission control device 20 confirms the existence of at least one of the metallic foreign object and the living thing, it controls the power transmission circuit 22 so as not to perform power transmission from the power transmission device 2 to the power reception device 5. On the other hand, when the power transmission control device 20 does not confirm the existence of the metallic foreign object and the living thing, it makes the power transmission power P1 [W] become a predetermined target power transmission power P1 tgtcontrols the power transmission circuit 22 in such a manner.

[0043] In this embodiment, the target power transmission power P1 tgt is set to a preset fixed value. However, for example, if the approach signal contains information related to the required power reception power of the vehicle 4 that is the transmission source of the approach signal, the target power transmission power P1 tgt can also be set to the required power reception power.

[0044] In addition, the power transmission side current I1 and the coupling coefficient k indicating the magnetic coupling degree between the power transmission coil of the power transmission resonator 21 and the power reception coil of the power reception resonator 51 are in a correlation relationship, and have a tendency that the smaller the coupling coefficient k, the larger it is. Therefore, after receiving the approach signal, for example, by monitoring the power transmission side current I1, it is possible to judge the approach and departure of the vehicle 4 with respect to the power transmission device 2, and it is possible to start or end the control of the power transmission circuit 22 based on this judgment.

[0045] The vehicle 4 includes: a communication device 41, a map information storage device 42, a GPS reception device 43, an HMI device 44, a navigation device 45, a power reception device 5, and a vehicle control device 40. The communication device 41, the map information storage device 42, the GPS reception device 43, the HMI device 44, the navigation device 45, and the power reception device 5 are connected to the vehicle control device 40 via an in-vehicle network 46 conforming to standards such as CAN.

[0046] The communication device 41 is an in-vehicle terminal having a wireless communication function. The communication device 41 connects to the network 6 (refer to Figure 1 ) via a wireless base station 7 (refer to Figure 1 ) connected via a gateway (not shown) and others, and is connected to the network 6 via the wireless base station 7. Thereby, communication is performed mutually between the vehicle 4 and the server 1.

[0047] The map information storage device 42 stores map information including the position information of roads and information related to road categories (for example, information related to whether the road is an electrified road or not).

[0048] The GPS reception device 43 receives radio waves from artificial satellites to determine the latitude and longitude of the own vehicle 4, and detects the current position of the own vehicle 4. The GPS reception device 43 sends the detected current position information of the own vehicle 4 to the vehicle control device 40.

[0049] The HMI device 44 is an interface for exchanging information with vehicle occupants. The HMI device 44 of the present embodiment includes a display, a speaker for providing various information to vehicle occupants, and a touch panel (or operation buttons) for vehicle occupants to perform input operations of information. The HMI device 44 sends the input information input by vehicle occupants to various devices that require the input information (for example, if the input information is a destination, it is a navigation device), and displays the information received via the in-vehicle network 46 on the display, etc., to provide it to vehicle occupants.

[0050] The navigation device 45 is a device that guides the vehicle 4 to a destination set by vehicle occupants via the HMI device 44. For example, the navigation device 45 sets a driving route to the destination based on the current position information of the vehicle 4 and map information, and sends information related to the set driving route as navigation information to the vehicle control device 40, the HMI device 44, etc.

[0051] The power receiving device 5 includes: a power receiving resonator 51, a power receiving circuit 52, and a power receiving side transmitter 53.

[0052] As described above, the power receiving resonator 51 is a resonant circuit including a power receiving coil, and is configured to resonate at the same resonant frequency f as the power transmission resonator 21. 0 Resonate.

[0053] The power receiving circuit 52 is a circuit including a rectifier and a DC / DC converter, and is configured to be able to convert the AC power output from the power receiving resonator 51 into DC power using the rectifier and supply it to the electrical load 47 via the DC / DC converter. Examples of the electrical load 47 include a storage battery and a motor, etc., but are not particularly limited. In the present embodiment, the power receiving circuit 52 is connected to the storage battery as the electrical load 47. A power receiving side current sensor 54 for detecting the output current (hereinafter referred to as "power receiving side current") I2 of the rectifier and a power receiving side voltage sensor 55 for detecting the output voltage (hereinafter referred to as "power receiving side voltage") V2 of the rectifier are provided in the power receiving circuit 52, and the power receiving side current I2 and the power receiving side voltage V2 detected by the respective sensors 54, 55 are input to the vehicle control device 40 respectively.

[0054] The power receiving side transmitter 53 performs wireless communication with the power transmission side receivers 23 of the respective power transmission devices 2 using a predetermined wireless communication line, and sends the above proximity signal to the respective power transmission devices 2.

[0055] The vehicle control device 40 includes: a communication interface 401, a storage unit 402, and a vehicle processing unit 403.

[0056] The communication interface 401 is a communication interface circuit for connecting the vehicle control device 40 to the in-vehicle network 46.

[0057] The storage unit 402 has storage media such as an HDD, an optical recording medium, and a semiconductor memory, and stores various computer programs and data used in the processing in the vehicle processing unit 403.

[0058] The vehicle processing unit 403 has one or more processors and their peripheral circuits. The vehicle processing unit 403 executes various computer programs stored in the storage unit 402 to comprehensively control the vehicle 4, and is, for example, a CPU.

[0059] Furthermore, when the vehicle processing unit 403 of the vehicle control device 40 detects that the own vehicle 4 has approached an electrified road, it starts transmitting a proximity signal via the power receiving side transmitter 53, and controls the power receiving circuit 52 (DC / DC converter) to control the power receiving voltage V2 to the target power receiving voltage V2. tgt This is because the power transfer efficiency η between the resonators is in a correlation with the power receiving voltage V2. In the present embodiment, the target power receiving voltage V2 tgt is set to a predetermined voltage value that can obtain the desired power transfer efficiency η. tgt

[0060] In addition, the method for detecting the approach to the electrified road is not particularly limited. For example, it may be detected based on the current position information and navigation information (travel route) of the vehicle 4. If an infrastructure near the electrified road sends a signal notifying that it will travel on the electrified road to the passing vehicle 4, it may also be detected by receiving this signal.

[0061] However, when an abnormality occurs in the power transfer from the power transmission device 2 to the power reception device 5, if the cause of the abnormality lies in the power transmission device 2, it will affect all the vehicles 4 equipped with the power reception device 5 traveling on the electrified road where the abnormal power transmission device 2 is installed. That is, if an abnormality occurs in the power transmission device 2, its influence will spread over a large area. Therefore, it is required to be able to detect an abnormality in the power transmission device 2.

[0062] However, when an abnormality occurs in the power transfer from the power transmission device 2 to the power reception device 5 during the operation of the wireless power supply system 100, since the power transmission device 2 and the power reception device 5 are physically separated, it is necessary to determine whether the cause of the abnormality lies in the power transmission device 2 or in the power reception device 5. In addition, since the power reception device 5 is mounted on the vehicle 4 moving at high speed, it is necessary to determine with which power transmission device 2 the power transfer has become abnormal.

[0063] Thus, in the present embodiment, the power reception history information of each vehicle 4 is collected to the server 1. Based on the power reception history information of each vehicle 4 collected to the server 1, it is possible to detect an abnormality of the power feeding device 2 and the installation position of the power feeding device 2 where the abnormality occurs. In the present embodiment, the power reception history information of the vehicle 4 is the actual power transmission efficiency η calculated based on the received power P2 [W] received by the power reception device 5 during driving on the electrified road. real and the location information of the place where this power transmission efficiency η real is obtained (i.e., the power reception place of the received power P2) is information associated therewith.

[0064] Hereinafter, the abnormality detection control of the power feeding device 2 in the present embodiment will be described.

[0065] Figure 3 is a flowchart for explaining the content of the process executed between each vehicle 4 and the server 1 in order to collect the power reception history information of each vehicle 4 to the server 1.

[0066] In step S11, the vehicle control device 40 of each vehicle 4 determines whether the own vehicle 4 is driving on the electrified road based on the current position information of the own vehicle 4 and the map information. If the own vehicle 4 is driving on the electrified road, the vehicle control device 40 of each vehicle 4 proceeds to the process of step S12. On the other hand, if the own vehicle 4 is not driving on the electrified road, the vehicle control device 40 of each vehicle 4 ends the current process.

[0067] In step S12, the vehicle control device 40 of each vehicle 4 calculates the received power P2 received by the power reception device 5 based on the received current I2 and the received voltage V2, and calculates the power transmission efficiency η by dividing it by the target power feeding power P1 tgt to calculate the power transmission efficiency η real (= P2 / P1 tgt ).

[0068] In addition, regarding the value of the target power feeding power P1 tgt , if the value of the target power feeding power P1 tgt is set to a fixed value as in the present embodiment, it can be obtained by storing this value in the storage unit 402 of the vehicle control device 40 of each vehicle 4. In addition, for example, if the required received power is calculated in the vehicle control device 40 of each vehicle 4 based on the state of the electrical load 47 (for example, if the electrical load 47 is a battery, it is the battery charge rate) and the approach signal includes information related to the required received power, the required received power can be set as the target power feeding power P1 tgt .

[0069] In step S13, the vehicle control device 40 of each vehicle 4 generates the power transmission efficiency ηreal and obtained the power transmission efficiency η real with the location information of the place (i.e., the power receiving place of the received power P2, and the current position information of the vehicle 4 when the received current I2 and the received voltage V2 used in the calculation of the power transmission efficiency η real are obtained) to establish associated power receiving history information, and store it in the storage unit 402.

[0070] In step S14, the vehicle control device 40 of each vehicle 4 determines whether the amount of information of the power receiving history information stored in the storage unit 402 is equal to or more than a predetermined amount. If the amount of information of the power receiving history information is equal to or more than a predetermined amount, the vehicle control device 40 of each vehicle 4 proceeds to the process of step S15. On the other hand, if the amount of information of the power receiving history information is less than the predetermined amount, the vehicle control device 40 of each vehicle 4 ends the current process.

[0071] In step S15, the vehicle control device 40 of each vehicle 4 sends all the power receiving history information stored in the storage unit 402 to the server 1, and deletes the sent power receiving history information from the storage unit 402.

[0072] In step S16, the server 1 stores the power receiving history information received from each vehicle 4 in the server storage unit 12. In this way, the power receiving history information of each vehicle 4 is collected in the server 1.

[0073] Figure 4 It is a flowchart for explaining the content of the process executed in the server 1 to detect the abnormality of the power transmission device 2.

[0074] In step S21, the server 1 determines whether the amount of information of the power receiving history information stored in the server storage unit 12, that is, the aggregated power receiving history information that aggregates the power receiving history information of each vehicle 4, is equal to or more than a predetermined amount. If the amount of information of the aggregated power receiving history information is equal to or more than a predetermined amount, the server 1 proceeds to the process of step S22. On the other hand, if the amount of information of the aggregated power receiving history information is less than the predetermined amount, the server 1 determines that the amount of information for detecting the abnormality of the power transmission device 2 is insufficient and ends the current process.

[0075] In step S22, the server 1 performs an abnormality detection process for detecting the abnormality of the power transmission device 2 and the installation position of the power transmission device 2 where the abnormality has occurred based on the aggregated power receiving history information. For details of the abnormality detection process, refer to Figure 5 for description.

[0076] Figure 5 It is a flowchart for explaining the details of the abnormality detection process.

[0077] In step S221, the server 1 refers to the aggregated power receiving history information (i.e., the power transmission efficiency ηreal and the power transmission efficiency η is obtained real For each vehicle 4 whose power reception history information is associated with the location information of the location where η is obtained, it is determined whether there is a location where the power transmission efficiency η real is less than a predetermined value η1 (<η tgt ). That is, a location where power transmission may have been abnormal. If there is a location where the power transmission efficiency η real is less than the predetermined value η1, the server 1 proceeds to the process of step S222. On the other hand, if there is no location where the power transmission efficiency η real is less than the predetermined value η1, the server 1 determines that there is no abnormality and ends the current process.

[0078] In step S222, the server 1 refers to the aggregated power reception history information and calculates, for each location where the power transmission efficiency η real is less than the predetermined value η1, the number NC of vehicles 4 whose power transmission efficiency η real is less than the predetermined value η1. That is, for each location confirmed to exist in step S221, it is calculated how many vehicles 4 with a power transmission efficiency η real less than the predetermined value η1 exist at that location.

[0079] In step S223, the server 1 determines whether there is a location where the number NC of vehicles 4 is equal to or greater than a predetermined power transmission abnormality determination value NC0. If there is a location where the number N of vehicles 4 is equal to or greater than the power transmission abnormality determination value NC0, at that location, the power transmission efficiency η of multiple vehicles 4 with a number equal to or greater than the power transmission abnormality determination value NC0 real is less than the predetermined value η1. Therefore, the server 1 determines that there is a high probability that an abnormality has occurred in the power transmission device 2 installed at that location and proceeds to the process of step S224. On the other hand, if there is no location where the number NC of vehicles 4 is equal to or greater than the power transmission abnormality determination value NC0, the server 1 does not perform abnormality determination and ends the current process.

[0080] In step S224, the server 1 determines that an abnormality has occurred in the power transmission device 2 at the location where the number NC of vehicles 4 is equal to or greater than the power transmission abnormality determination value NC0.

[0081] Thus, in the present embodiment, in the case where there is a location where the number NC of vehicles 4 with a power transmission efficiency η real less than the predetermined value η1 is equal to or greater than the power transmission abnormality determination value NC0, it is determined that an abnormality has occurred in the power transmission device 2 installed at that location. However, the method for determining the abnormality of the power transmission device 2 is not limited to such a method.

[0082] For example, it is also possible to be based on the power transmission efficiency η real at the location where the power transmission efficiency η realThe ratio of vehicles 4 less than a predetermined value η1 (hereinafter referred to as "abnormal occurrence ratio") is used to determine whether an abnormality has occurred in the power transmission device 2 set at this location. The abnormal occurrence ratio can be set as the power transmission efficiency η, for example. real The power transmission efficiency η at a location less than the predetermined value η1 real The number of vehicles 4 less than the predetermined value η1, NC, and the power transmission efficiency η real The number ratio R of the number of vehicles 4 with a value equal to or greater than the predetermined value η1 (i.e., the number of vehicles that can be considered to have normally performed power transmission), MC. If the number ratio R is set as the power transmission efficiency η real The number of vehicles 4 less than the predetermined value η1, NC, with respect to the power transmission efficiency η real In the case of the ratio of the number of vehicles 4 with a value equal to or greater than the predetermined value η1, MC, that is, when the number ratio R is set as NC / MC, it can be determined that an abnormality has occurred in the power transmission device 2 set at a location where the number ratio R is equal to or greater than a predetermined abnormal determination value R0.

[0083] In addition, for example, instead of the power transmission efficiency η real The number of vehicles 4 less than the predetermined value η1, NC, by comparing the number of data ND with a predetermined power transmission abnormality determination value ND0 when the power transmission efficiency η is less than the predetermined value η1 to determine whether an abnormality has occurred in the power transmission device 2. That is, it is also possible to determine that an abnormality has occurred in the power transmission device 2 set at this location when the number of data ND with a power transmission efficiency η less than the predetermined value η1 is equal to or greater than the power transmission abnormality determination value ND0. real real real real

[0084] Figure 6 This is a flowchart for explaining the content of the processing executed by the server 1 when an abnormality of the power transmission device 2 is detected and the content of the processing executed in each vehicle 4 accordingly.

[0085] In step S31, the server 1 collectively sends power transmission device abnormality information including information related to the installation location of the power transmission device 2 where the abnormality has occurred to each vehicle 4.

[0086] At this time, for example, if there is a management center that manages each power transmission device 2, the power transmission device abnormality information can also be sent to the management center in such a way that arrangements for repairing the power transmission device 2 are made via the management center. In addition, if there is a repair device that can autonomously move to repair the power transmission device 2, the power transmission device abnormality information can also be sent to the repair device, and the repair device can be dispatched to the installation location of the power transmission device 2 where the abnormality has occurred.

[0087] In step S32, when the vehicle control device 40 of each vehicle 4 receives power transmission device abnormality information from the server 1, it provides information related to the installation location of the power transmission device 2 in which the abnormality has occurred to the vehicle occupants via the HMI device 44. For example, the vehicle control device 40 of each vehicle 4 causes the installation location of the power transmission device 2 in which the abnormality has occurred to be displayed on the display as needed.

[0088] At this time, for example, if the vehicle 4 that has received the power transmission device abnormality information is an autonomous driving vehicle capable of autonomous driving, the planned driving route may also be changed based on the power transmission device abnormality information. For example, when the current planned driving route (i.e., the planned driving route before receiving the power transmission device abnormality information) is a driving route passing on an electrified road including the power transmission device 2 in which the abnormality has occurred, it may be changed to another driving route that does not pass on the electrified road including the power transmission device 2 in which the abnormality has occurred.

[0089] In addition, as a condition for whether to change the driving route, it may also be limited to the case where the abnormal range of the power transmission device 2 on the electrified road is equal to or more than a predetermined area, and the driving route is changed to a driving route that does not pass on the electrified road. This is because, in an electrified road where many power transmission devices 2 are installed, even if abnormalities occur in a small number of power transmission devices 2, it is sometimes possible to sufficiently wirelessly power the vehicle 4 traveling on the electrified road using other normal power transmission devices 2.

[0090] According to the present embodiment described above, the server 1 (abnormality determination device) that determines the abnormality of the power transmission device 2 provided on the road includes: a server processing unit 13, a server communication unit 11 capable of communicating with a plurality of vehicles 4 (mobile bodies) each having a power receiving device 5 that receives wireless power transmission from the power transmission device 2, and a server storage unit 12 that stores the power receiving history information received from the vehicles 4. The power receiving history information is information including the power receiving location of the power receiving power P2 received by the power receiving device 5 and the power transmission efficiency η calculated based on the power receiving power P2. real And the server processing unit 13 is configured to extract information on the power receiving locations where the power transmission efficiency η is less than a predetermined value η1 from the power receiving history information of the plurality of vehicles 4 stored in the server storage unit 12, and is configured to determine the abnormality of the power transmission device 2 based on the extracted information on the power receiving locations. real Specifically, the server processing unit 13 is configured to determine that the power transmission device 2 installed at the power receiving location where the number NC of vehicles 4 with a power transmission efficiency η less than a predetermined value η1 is equal to or more than a predetermined power transmission abnormality determination value NC0 has an abnormality.

[0091] Specifically, the server processing unit 13 is configured to determine that the power transmission device 2 installed at the power receiving location where the number NC of vehicles 4 with a power transmission efficiency η less than a predetermined value η1 is equal to or more than a predetermined power transmission abnormality determination value NC0 has an abnormality. real Specifically, the server processing unit 13 is configured to determine that the power transmission device 2 installed at the power receiving location where the number NC of vehicles 4 with a power transmission efficiency η less than a predetermined value η1 is equal to or more than a predetermined power transmission abnormality determination value NC0 has an abnormality.

[0092] Thus, it is possible to detect an abnormality in the power transmission device 2 and the installation position of the power transmission device 2 where the abnormality has occurred based on the power reception history information of each vehicle 4 collected in the server 1 .

[0093] In addition, for example, the server processing unit 13 may be configured based on the power transmission efficiency η real The power transmission efficiency η at the receiving site is less than the predetermined value η1 real The abnormality of the power transmission device 2 is determined by the ratio of vehicles 4 whose power transmission efficiency η is less than the predetermined value η1. real The number NC of vehicles 4 whose number is less than the predetermined value η1 is divided by the power transmission efficiency η real If the number ratio R is obtained by the number of vehicles 4 MC being equal to or greater than the predetermined value η1, it can be determined that an abnormality has occurred in the power transmission device 2 installed at the power receiving location where the number ratio R is equal to or greater than the predetermined power transmission abnormality determination value R0. In addition, for example, the server processing unit 13 may be configured to determine that an abnormality has occurred in the power transmission device 2 installed at the power receiving location where the power transmission efficiency η is equal to or greater than the predetermined power transmission abnormality determination value R0. real The number of data ND of data less than the predetermined value η1 is greater than the predetermined power transmission abnormality determination value ND0, indicating that an abnormality has occurred in the power transmission device 2. Even if the server processing unit 13 is configured in this way, it is possible to detect an abnormality in the power transmission device 2 and the installation location of the power transmission device 2 where the abnormality has occurred based on the power reception history information of each vehicle 4 collected in the server 1.

[0094] In addition, the server processing unit 13 of the present embodiment is configured to transmit power transmission device abnormality information including information related to the installation location of the power transmission device 2 in which the abnormality occurred to a management center that manages the power transmission device 2 or a repair device that can autonomously act to repair the power transmission device 2. Thus, the repair of the power transmission device 2 can be advanced.

[0095] In addition, the driving wireless power supply system 100 (abnormality determination system) of the present embodiment includes a server 1 (abnormality determination device) and a plurality of vehicles 4 (mobile bodies). Furthermore, the server processing unit 13 of the server 1 is configured to transmit power transmission device abnormality information including information related to the installation location of the abnormal power transmission device 2 to the vehicle 4, and the vehicle 4 is configured to set a driving route in consideration of the received power transmission device abnormality information.

[0096] Specifically, when the planned driving route before receiving the abnormal information of the power feeding device is a driving route passing on the electrified road including the power feeding device 2 where the abnormality has occurred, the vehicle 4 is configured to change the planned driving route to another driving route on the electrified road. Alternatively, when the planned driving route before receiving the abnormal information of the power feeding device is a driving route passing on the electrified road including the power feeding device 2 where the abnormality has occurred, if the abnormal range of the power feeding device 2 on the electrified road is equal to or larger than a predetermined area, the vehicle 4 is configured to change the planned driving route to a driving route on another electrified road.

[0097] Thereby, it is possible to prevent a situation where, although driving on an electrified road, sufficient power supply cannot be received from the power feeding device 2.

[0098] In addition, in the present embodiment, the server processing unit 13 of the server 1 is configured to transmit the power feeding device abnormal information including the information related to the installation location of the power feeding device 2 where the abnormality has occurred to the vehicle 4, and the vehicle 4 is configured to, when receiving the power feeding device abnormal information, provide the information related to the installation location of the power feeding device 2 where the abnormality has occurred to the occupants of the vehicle 4 via the HMI device 44 (information providing device) mounted on the vehicle 4.

[0099] Thereby, it is possible to notify the occupants of each vehicle 4 of the installation location of the power feeding device 2 where the abnormality has occurred.

[0100] In addition, from another perspective of the present embodiment, the process executed in the server 1 of the present embodiment can also be understood as an abnormality determination method for determining an abnormality of the power feeding device 2 installed on the road, including the following steps: collecting power reception history information by communicating with a plurality of vehicles 4 (mobile bodies) each having a power reception device 5 that receives wireless power from the power feeding device 2, the power reception history information including the power reception location of the received power P2 by the power reception device 5 and the power reception power P2 or the power transmission efficiency η calculated based on the power reception power P2 real ; extracting the power transmission efficiency η from the collected power reception history information real information on the power reception location where the power transmission efficiency η is less than a predetermined value η1; and determining an abnormality of the power feeding device 2 based on the extracted information on the power reception location.

[0101] (Second Embodiment)

[0102] Next, a second embodiment of the present invention will be described. This embodiment is different from the first embodiment in terms of detecting abnormalities of the foreign object detection device 24 and the living thing protection device 25, etc. Hereinafter, the description will be centered on this difference.

[0103] Figure 7 It is a diagram for explaining the detailed structures of the power feeding device 2 and the vehicle 4 of the present embodiment.

[0104] As Figure 7 shown, the structures of the power transmission device 2 and the vehicle 4 in this embodiment are the same as those in the first embodiment, except that the power transmission device 2 is provided with a communication device 29. The communication device 29 is a terminal having a wireless communication function, and is connected to the network 6 (refer to Figure 1 ) via a wireless base station 7 (refer to Figure 1 ) that is connected to the network 6 through access via a gateway (not shown), etc. Thus, in this embodiment, communication is also performed between each power transmission device 2 and the server 1.

[0105] Figure 8 is a flowchart for explaining the content of the processing executed in each power transmission device 2 to detect an abnormality of the foreign object detection device 24 and the content of the processing executed in the server 1 accordingly.

[0106] In step S41, the power transmission control device 20 of the power transmission device 2 determines whether the foreign object detection device 24 is driven in accompaniment with the reception of the approach signal. When the foreign object detection device 24 is driven, the power transmission control device 20 proceeds to the processing of step S42. On the other hand, if the foreign object detection device 24 is not driven, the power transmission control device 20 ends the present processing.

[0107] In step S42, the power transmission control device 20 of the power transmission device 2 detects whether a metal foreign object is detected by the foreign object detection device 24. When a metal foreign object is detected, the power transmission control device 20 proceeds to the processing of step S43. On the other hand, when a metal foreign object is not detected, the power transmission control device 20 ends the present processing.

[0108] In step S43, the power transmission control device 20 of the power transmission device 2 stores the time when the metal foreign object is detected in the storage unit 202, and calculates the detection frequency X of the metal foreign object in the most recent predetermined period from the current time with reference to the times when the metal foreign object has been detected and stored in the storage unit 202.

[0109] In step S44, the power transmission control device 20 of the power transmission device 2 determines whether the detection frequency X of the metal foreign object is equal to or greater than a predetermined abnormality determination threshold X0. If the detection frequency X of the metal foreign object is equal to or greater than the abnormality determination threshold X0, the power transmission control device 20 proceeds to the processing of step S45. On the other hand, if the detection frequency X of the metal foreign object is less than the abnormality determination threshold X0, the power transmission control device 20 ends the present processing.

[0110] In step S45, the power transmission control device 20 of the power transmission device 2 determines that an abnormality related to the foreign object detection device 24 has occurred. Specifically, the power transmission control device 20 determines that at least one of an abnormality in the foreign object detection device 24 itself and an abnormality in which a stationary foreign object exists at the installation location of the power transmission device 2 has occurred. In addition, when the power transmission control device 20 determines that an abnormality related to the foreign object detection device 24 has occurred, it stops power transmission to the power receiving device 5 until the abnormality is eliminated.

[0111] In step S46, the power transmission control device 20 of the power transmission device 2 transmits information including the installation location of the power transmission device 2 and a notification notifying that an abnormality related to the foreign object detection device 24 provided at the installation location has occurred (hereinafter referred to as "foreign object detection abnormality information") to the server 1.

[0112] In step S47, the server 1 stores the foreign object detection abnormality information received from each power transmission device 2 in the server storage unit 12. Thereby, the server 1 can grasp the installation location of the power transmission device 2 in which an abnormality related to the foreign object detection device 24 has occurred. Therefore, information related to the installation location of the power transmission device 2 in which an abnormality related to the foreign object detection device 24 has occurred can be transmitted to each vehicle 4 via the server 1, and arrangements for repairing the foreign object detection device 24 or removing stationary foreign objects can be made.

[0113] Figure 9 It is a flowchart for explaining the content of the processing executed in each power transmission device 2 to detect an abnormality of the living thing protection device 25 and the content of the processing executed in the server 1 accompanying this.

[0114] In step S51, the power transmission control device 20 of the power transmission device 2 determines whether the living thing protection device 25 has been driven in response to the reception of the approach signal. When the living thing protection device 25 has been driven, the power transmission control device 20 proceeds to the processing in step S52. On the other hand, if the living thing protection device 25 has not been driven, the power transmission control device 20 ends the current processing.

[0115] In step S52, the power transmission control device 20 of the power transmission device 2 detects whether a living thing has been detected by the living thing protection device 25. When a living thing has been detected, the power transmission control device 20 proceeds to the processing in step S53. On the other hand, when a living thing has not been detected, the power transmission control device 20 ends the current processing.

[0116] In step S53, the power transmission control device 20 of the power transmission device 2 stores the time when a living thing is detected in the storage unit 202, and calculates the number of detections Y of living things in the most recent predetermined period from the current time with reference to the time when a living thing has been detected stored in the storage unit 202 so far.

[0117] In step S54, the power transmission control device 20 of the power transmission device 2 determines whether the detection count Y of a living thing is equal to or greater than a predetermined abnormal determination threshold Y0. If the detection count Y of the living thing is equal to or greater than the abnormal determination threshold Y0, the power transmission control device 20 proceeds to the process of step S55. On the other hand, if the detection count Y of the living thing is less than the abnormal determination threshold Y0, the power transmission control device 20 ends the current process.

[0118] In step S55, the power transmission control device 20 of the power transmission device 2 determines that an abnormality related to the living thing protection device 25 has occurred. Specifically, the power transmission control device 20 determines that at least one of an abnormality in the living thing protection device 25 itself and an abnormality in which a stationary foreign object exists at the installation location of the power transmission device 2 has occurred. In addition, when the power transmission control device 20 determines that an abnormality related to the living thing protection device 25 has occurred, it stops the power transmission to the power receiving device 5 until the abnormality is eliminated.

[0119] In step S56, the power transmission control device 20 of the power transmission device 2 transmits information (hereinafter referred to as "living thing protection abnormality information") including the installation location of the power transmission device 2 and a notification indicating that an abnormality related to the living thing protection device 25 installed at the installation location has occurred to the server 1.

[0120] In step S57, the server 1 stores the living thing protection abnormality information received from each power transmission device 2 in the server storage unit 12. Thus, the server 1 can grasp the installation location of the power transmission device 2 where an abnormality related to the living thing protection device 25 has occurred. Therefore, information related to the installation location of the power transmission device 2 where an abnormality related to the living thing protection device 25 has occurred can be transmitted to each vehicle 4 via the server 1 to arrange for the repair of the living thing protection device 25 or the removal of the stationary foreign object.

[0121] Figure 10 is a flowchart for explaining the details of the abnormality detection process of the present embodiment executed by the server 1. In addition, in Figure 10 the content of the processes in steps S221 to S224 is the same as that of the first embodiment, and thus the description thereof is omitted here.

[0122] In step S225, the server 1 determines whether there is a location where an abnormality related to the foreign object detection device 24 or an abnormality related to the living thing protection device 25 has occurred in a location where the power transmission efficiency η real is less than a predetermined value η1.

[0123] If there is a location where an abnormality related to the foreign object detection device 24 or an abnormality related to the living thing protection device 25 has occurred in a location where the power transmission efficiency η real is less than a predetermined value η1, the server 1 proceeds to the process of step S226. On the other hand, if in the location where the power transmission efficiency ηreal If there is no place where an abnormality related to the foreign object detection device 24 or an abnormality related to the living object protection device 25 has occurred in a place where the value is less than the predetermined value η1, the server 1 proceeds to the process of step S222.

[0124] In step S226, the server 1 refers to the aggregated power reception history information, foreign object detection abnormality information, and living object protection abnormality information, and extracts from the places where the power transmission efficiency η real is less than the predetermined value η1, places where neither an abnormality related to the foreign object detection device 24 nor an abnormality related to the living object protection device 25 has occurred. For each of the extracted places, the power transmission efficiency η real is less than the number NC of vehicles 4 with the predetermined value η1.

[0125] In this way, in the present embodiment, after excluding the places where an abnormality related to the foreign object detection device 24 or the living object protection device 25 has occurred from the places where the power transmission efficiency η real is less than the predetermined value η1, the number NC of vehicles 4 with the power transmission efficiency η real less than the predetermined value η1 is calculated. Thus, it is possible to identify the places where the power transmission efficiency η real is less than the predetermined value η1 although the foreign object detection device 24 and the living object protection device 25 are normal, that is, the installation places of the power transmission device 2 where an abnormality has occurred in power transmission although the foreign object detection device 24 and the living object protection device 25 are normal.

[0126] The in-motion wireless power supply system 100 (abnormality determination system) of the present embodiment described above includes a server 1 (abnormality determination device) and a power transmission device 2. Further, the power transmission device 2 includes a detection device (foreign object detection device 24 or living object protection device 25) configured to detect foreign objects existing on the road, and a power transmission control device 20 configured to determine that an abnormality related to the detection device has occurred when the detection frequency (X or Y) of the foreign object within a predetermined period reaches a predetermined number of times (X0 or Y0) or more. Thus, it is possible to detect that an abnormality has occurred in the foreign object detection device 24 or the living object protection device 25.

[0127] In addition, the power transmission device 2 includes a communication device 29 capable of communicating with the server 1, and the power transmission control device 20 is configured to, when the detection frequency of the foreign object within a predetermined period reaches a predetermined number of times or more, transmit information related to the installation place of the power transmission device 2 where an abnormality related to the detection device has occurred to the server 1 via the communication device 29.

[0128] Accordingly, the server 1 can identify the installation location of the power transmission device 2 where an abnormality related to the detection device has occurred. Therefore, information related to the installation location of the power transmission device 2 where an abnormality related to the detection device has occurred can be sent to each vehicle 4 via the server 1, and arrangements can be made for the repair of the detection device or the removal of foreign objects.

[0129] In addition, in the present embodiment, the server storage unit 12 stores information related to the installation location of the power transmission device 2 where an abnormality related to the detection device (foreign object detection device 24 or living thing protection device 25) has occurred, which is received from the power transmission control device 20 of the power transmission device 2. The server processing unit 13 is configured to determine the installation location of the power transmission device 2 where an abnormality has occurred in power transmission from the installation locations of the power transmission devices 2 where no abnormality related to the detection device has occurred, based on the power reception history information and the information received from the power transmission control device 20.

[0130] Accordingly, it is possible to distinguish whether the abnormality has occurred in the detection device or in power transmission, and to determine the installation location of the power transmission device 2 where an abnormality has occurred in power transmission.

[0131] Although the embodiments of the present invention have been described above, the above embodiments merely show a part of the application examples of the present invention, and are not intended to limit the technical scope of the present invention to the specific structures of the above embodiments.

[0132] For example, in the above first embodiment, information associating the power transmission efficiency η calculated based on the received power P2 with the location information of the location where this power transmission efficiency η is obtained is sent from each vehicle 4 to the server 1 as power reception history information. However, it is also possible to send information associating the received power P2 with the location information of the location where this received power P2 is obtained from each vehicle 4 to the server 1 as power reception history information, and convert the received power into the power transmission efficiency η in the server 1. real and the location information of the location where this power transmission efficiency η is obtained real as power reception history information. That is, in the first embodiment, the power reception history information may also be information including the received power P2 received by the power reception device 5 and its power reception location. real

[0133] Description of Reference Numerals

[0134] 1 Server (Abnormality Determination Device)

[0135] 11 Server Communication Unit (Communication Unit)

[0136] 12 Server Storage Unit (Storage Unit)

[0137] 13 Server Processing Unit (Processing Unit)

[0138] 2 Power Transmission Device

[0139] 20 Power transmission control device

[0140] 4 Vehicle (mobile body)

[0141] 5 Power receiving device

[0142] 100 Wireless power supply system during driving (abnormality determination system).

Claims

1. An abnormality determination system includes an abnormality determination device that determines an abnormality of a power transmission device provided on a road, and the power transmission device. The abnormality determination device includes: a processing unit; a communication unit capable of communicating with a plurality of moving bodies each having a power receiving device that receives power wirelessly transmitted from the power transmission device; and a storage unit that stores power receiving history information received from the moving bodies, wherein the power receiving history information is information including a power receiving location where power is received by the power receiving device and a power transmission efficiency calculated based on the received power, the processing unit is configured to extract information on the power receiving location where the power transmission efficiency is less than a predetermined value from the power receiving history information of the plurality of moving bodies stored in the storage unit, and is configured to determine an abnormality of the power transmission device based on the extracted information on the power receiving location; the power transmission device includes: a detection device configured to detect foreign objects present on the road; and a power transmission control device configured to determine that an abnormality related to the detection device has occurred when the number of detections of the foreign objects within a predetermined period is equal to or more than a predetermined number, the power transmission device further includes a communication device capable of communicating with the abnormality determination device, the power transmission control device is configured to, when the number of detections of the foreign objects within a predetermined period is equal to or more than a predetermined number, transmit information related to the installation location of the power transmission device in which an abnormality related to the detection device has occurred to the abnormality determination device via the communication device, the storage unit stores information related to the installation location of the power transmission device in which an abnormality related to the detection device has occurred, received from the power transmission control device, the processing unit is configured to determine, based on the power receiving history information and the information received from the power transmission control device, the installation location of the power transmission device in which an abnormality in power transmission has occurred among the installation locations of the power transmission devices in which no abnormality related to the detection device has occurred.

2. The abnormality determination system according to claim 1, wherein the detection device is a foreign object detection device that detects metal foreign objects present on the road or a living thing protection device that detects living things present on the road.

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