Operation status judgment device and wireless power transmission system

Abstract

The present invention relates to an operation state judgment device and a wireless power transmission system. A processing section is configured to calculate an elapsed time from an inspection date or an installation date of a power transmission device installed at an abnormality occurrence location to an abnormality occurrence date based on inspection information and information about abnormality occurrence related to the abnormality occurrence location and the abnormality occurrence date, at which the power transmission efficiency from the power transmission device to the power receiving device received from a moving body through a communication section becomes less than a predetermined value, and the processing section is configured to judge the operation state of the power receiving device based on the elapsed time.

Description

Technical Field

[0001] The present disclosure relates to an operation state judgment device and a wireless power transmission system. Background Art

[0002] Japanese Unexamined Patent Publication No. 2010-167898 discloses a vehicle configured to be able to charge a battery through dynamic wireless power transmission. Summary of the invention

[0003] When an abnormality occurs in power transmission from a power transmission device to a power receiving device, the dynamic wireless power transmission system must judge whether the cause of the abnormality is located in the power transmission device installed on the road, or it is located in the power receiving device installed in the vehicle. In particular, if an abnormality occurs in the power receiving device, power is apt to not be transmitted to the vehicle in which the power receiving device in which the abnormality occurs is installed, or even if it can be transmitted, the amount of power transmission is apt to be reduced from the normal time and the travel of the vehicle is apt to be hindered. Therefore, if an abnormality occurs in power transmission from a power transmission device to a power receiving device, it is desirable to judge the operating state of the power receiving device.

[0004] The present disclosure has been made focusing on such a problem, and an object of the present disclosure is to judge the operating state of the power receiving device in a case where an abnormality has occurred in power transmission from the power transmission device to the power receiving device.

[0005] In order to solve the above-mentioned problem, an operation state judgment device according to one aspect of the present disclosure includes: a processor; a communication device configured to be able to communicate with a mobile body provided with a power receiving device for receiving power wirelessly transmitted from a power transmission device installed on a road; and a storage device configured to store inspection information related to an inspection date or an installation date of the power transmission device. The processor is configured to calculate an elapsed time from the inspection date or the installation date of the power transmission device installed at the abnormality occurrence location based on the inspection information and information about the abnormality occurrence related to the abnormality occurrence location and the abnormality occurrence date, and judge the operation state of the power receiving device based on the elapsed time, wherein at the abnormality occurrence location and the abnormality occurrence date, the power transmission efficiency from the power transmission device to the power receiving device received from the mobile body through the communication device becomes less than a predetermined value.

[0006] In addition, a wireless power transmission system according to an aspect of the present disclosure includes: a mobile body provided with a power receiving device for receiving power wirelessly transmitted from a power transmission device installed on a road; and a server in which inspection information related to an inspection date or an installation date of the power transmission device is stored. The mobile body is configured to: detect an abnormality occurrence location and an abnormality occurrence date, at which the power transmission efficiency from the power transmission device to the power receiving device has become less than a predetermined value; and send information related to the abnormality occurrence location and the abnormality occurrence date to the server. The server is configured to: calculate the elapsed time from the inspection date or the installation date of the power transmission device installed at the abnormality occurrence location to the abnormality occurrence date based on the inspection information and the information about the abnormality occurrence received from the mobile body; and judge the operating state of the power receiving device based on the elapsed time.

[0007] According to the aspects of the present disclosure, if an abnormality occurs in power transmission from the power transmission device to the power receiving device within a predetermined period of time from the inspection date or installation date of the power transmission device, the state of the power receiving device can be judged using a characteristic in which the possibility of the abnormality occurring in the power receiving device rather than the power transmission device is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 is a schematic diagram of a configuration of a dynamic wireless power transmission system according to an embodiment of the present disclosure.

[0009] Figure 2 are views explaining detailed configurations of a power transmission apparatus and a vehicle according to an embodiment of the present disclosure.

[0010] Figure 3 is a flowchart for explaining the content of a process performed by a server for collecting inspection information related to an inspection date of a power transmission device at the server.

[0011] Figure 4 It is a flowchart for explaining the content of processing performed between the vehicle and the server for judging the operating state of the power receiving device.

[0012] Figure 5 is a distribution graph showing one example of the distribution of the number of power transmission devices for each time period from when the power transmission device is inspected to when an abnormality occurs. DETAILED DESCRIPTION

[0013] Hereinafter, referring to the accompanying drawings, embodiments of the present disclosure will be explained in detail. Note that in the following explanation, similar constituent elements will be given the same reference symbols.

[0014] Figure 1is a schematic diagram of a configuration of a dynamic wireless power transmission system 100 according to an embodiment of the present disclosure.

[0015] The dynamic wireless power transmission system 100 according to the present embodiment is provided with a server 1, a plurality of power transmission devices 2 installed continuously at predetermined intervals along a road, a power supply device 3 for supplying power to the power transmission devices 2, and a plurality of vehicles 4 in which power receiving devices (see Figure 2 ) to receive the electric power wirelessly transmitted from the power transmission device 2. The vehicle 4 may be an electric vehicle, may be a hybrid vehicle, or may be a so-called engine vehicle. There is no particular limitation on the type. Note that in the following description, as necessary, a road on which the power transmission device 2 is installed will be referred to as an "electrified road".

[0016] The server 1 is provided with a server communication section 11 , a server storage section 12 , and a server processing section 13 .

[0017] The server communication portion 11 has a communication interface circuit for connecting the server 1 to the network 6 through, for example, a gateway or the like and is configured to be able to communicate with the vehicle 4 .

[0018] The server storage section 12 has an HDD (Hard Disk Drive) or an optical recording medium, a semiconductor memory, or other storage medium, and stores various types of computer programs or data or the like for processing at the server processing section 13 .

[0019] The server processing section 13 has one or more CPUs (central processing units) and their peripheral circuits. The server processing section 13 runs various types of computer programs stored in the server storage section 12 and generally controls the overall operation of the server 1. For example, the server processing section 13 is a processor. Figures 3 to 5 The processing performed by the server processing section 13 and further by the server 1 is explained.

[0020] Figure 2 2 are views explaining detailed configurations of the power transmission device 2 and the vehicle 4 according to the embodiment of the present disclosure.

[0021] The power transmission device 2 is provided with a power transmission resonator 21, a power transmission circuit 22, a power transmission side receiver 23, a foreign object detection device 24, a living body 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 body protection device 25 are connected to the power transmission control device 20 through an internal network 28 in the power transmission device 2 based on CAN (Controller Area Network) or other standards.

[0022] The power transmission resonator 21 is a resonance circuit including a power transmission coil, and is configured to transmit power at a predetermined resonance frequency f 0 The vehicle 4 is provided with a power receiving resonator 51 corresponding to the power transmission resonator 21. 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 By resonating the power transmission resonator 21 , the spatially separately arranged power transmission coil of the power transmission resonator 21 and the power receiving coil of the power receiving resonator 51 are magnetically coupled, and power is transmitted (wirelessly supplied) from the power transmission device 2 to the power receiving device 5 .

[0023] The power transmission circuit 22 is an electric circuit provided with an inverter, and is configured to convert the DC power supplied from the power supply device 3 into a desired AC power based on a control signal from the power transmission control device 20, and supply it to the power transmission resonator 21. The power transmission circuit 22 is provided with a power transmission side current sensor 26 for detecting a current I1 (hereinafter referred to as a "power transmission side current") flowing through the power transmission resonator 21, and a power transmission side voltage sensor 27 for detecting a voltage V1 (hereinafter referred to as a "power transmission side voltage") applied to the power transmission resonator 21. The power transmission side current I1 and the power transmission side voltage V1 detected by the sensors 26 and 27 are respectively input to the power transmission control device 20.

[0024] The power transmission side receiver 23 wirelessly communicates with the power reception side transmitter 53 installed in each vehicle 4 using a predetermined wireless communication line, and receives the approach signal transmitted from the power reception side transmitter 53. The approach signal is a signal for notifying that the vehicle 4 is approaching the power transmission device 2, and a signal for prompting the power transmission device 2 receiving the approach signal to prepare for power transmission.

[0025] The foreign matter detecting device 24 detects a metallic foreign matter present between the power transmission device 2 and the power receiving device 5 on the road. This is because if power is transmitted from the power transmission device 2 to the power receiving device 5 in a state where a metallic foreign matter is present in the space between the power transmission device 2 and the power receiving device 5, the metallic foreign matter is easily heated and the power transmission efficiency is easily reduced. The foreign matter detecting device 24 transmits foreign matter detection information on the presence or absence of the metallic foreign matter to the power transmission control device 20 in response to a request from the power transmission control device 20. The method by which the foreign matter detecting device 24 detects the metallic foreign matter is not particularly limited. For example, a metal detector or other various known techniques may be used for detection.

[0026] The living body protection device 25 detects any living body (e.g., a person or an animal, etc.) present around the power transmission device 2. This is because if the power transmission device 2 is driven in a state where a living body is present around the power transmission device 2, the living body will be exposed to the magnetic field leaked from the power transmission device 2 and is likely to be affected in health. The living body protection device 25 transmits living body detection information on whether a living body is present to the power transmission control device 20 in response to a request from the power transmission control device 20. The method of detecting a living body by the living body protection device 25 is not particularly limited. For example, image recognition or other various known technologies may be used.

[0027] The power transmission control device 20 is provided with a communication interface 201 , a storage section 202 , and a power transmission processing section 203 .

[0028] 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 equipment 2 .

[0029] The storage section 202 has an HDD or an optical recording medium, a semiconductor memory or other storage medium, and stores various computer programs or data or the like used for processing in the power transmission processing section 203 .

[0030] The power transmission processing section 203 has one or more processors and their peripheral circuits. The power transmission processing section 203 runs various computer programs stored in the storage section 202 to comprehensively control the power transmission device 2, and is, for example, a CPU.

[0031] For example, if a proximity signal is received by the power transmission side receiver 23, the power transmission processing section 203 and further the power transmission control device 20 drives the foreign matter detection device 24 and the living body protection device 25 to acquire foreign matter detection information and living body detection information. Furthermore, if the presence of at least one of a metallic foreign matter or a living body is confirmed, the power transmission control device 20 controls the power transmission circuit 22 so that no power is transmitted from the power transmission device 2 to the power receiving device 5. On the other hand, if the presence of a metallic foreign matter and a living body is not confirmed, the power transmission control device 20 controls the power transmission circuit 22 so that the transmitted power P1 [W] becomes a predetermined target power transmission power P1 [W]. tgt .

[0032] In this embodiment, the target power transmission power P1 is set to tgt is a preset fixed value, but for example, if the proximity signal includes information related to the power required to be received by the vehicle 4 sending the proximity signal, the target power transmission power P1 may be set to tgt Set to request to receive power.

[0033] Note that the power transmission side current I1 is related to the meshing coefficient "k" indicating the degree of magnetic meshing between the power transmission coil of the power transmission resonator 21 and the power receiving coil of the power receiving resonator 51. The smaller the meshing coefficient "k", the larger it becomes. Therefore, for example, by monitoring the power transmission side current I1 after receiving the approach signal, the approach and interval of the vehicle 4 relative to the power transmission device 2 can be judged, and the control of the power transmission circuit 22 can be started or ended according to the judgment.

[0034] The vehicle 4 is provided with a communication device 41, a map information storage device 42, a GPS receiving device 43, an HMI device 44, a navigation device 45, a power receiving device 5, and a vehicle control device 40. The communication device 41, the map information storage device 42, the GPS receiving device 43, the HMI device 44, the navigation device 45, and the power receiving device 5 are connected to the vehicle control device 40 via an internal vehicle network 46 based on CAN or other standards.

[0035] The communication device 41 is a vehicle-mounted terminal having a wireless communication function. The communication device 41 is connected to the network 6 (see Figure 1 ) connected wireless base station 7 (see Figure 1 ) to be connected to the network 6 via the wireless base station 7. Thus, the vehicle 4 and the server 1 communicate with each other.

[0036] The map information storage device 42 stores map information including position information of roads or information related to road types (for example, information on whether a road is an electrified road or the like).

[0037] The GPS receiving device 43 receives signals from satellites to identify the latitude and longitude of the host vehicle 4 and detects the current position of the host vehicle 4. The GPS receiving device 43 transmits the detected current position information of the host vehicle 4 to the vehicle control device 40.

[0038] The HMI device 44 is an interface for transmitting information with the vehicle occupants. The HMI device 44 according to the present embodiment is provided with a display or a speaker for providing various information to the vehicle occupants, and a touch panel (or an operation button) for the vehicle occupants to input information. The HMI device 44 sends the input information input by the vehicle occupants to various devices that require the input information (for example, a navigation device if the input information is a destination), and displays the information received through the internal vehicle network 46 on the display to provide it to the vehicle occupants.

[0039] The navigation device 45 is a device for guiding the vehicle 4 to the destination set by the vehicle occupant through the HMI device 44. For example, the navigation device 45 sets a travel route to the destination based on the current position information of the host vehicle 4 and map information, and transmits information related to the set travel route as navigation information to the vehicle control device 40 or the HMI device 44, etc.

[0040] The power receiving device 5 is provided with a power receiving resonator 51 , a power receiving circuit 52 , and a power receiving-side transmitter 53 .

[0041] As described above, the power receiving resonator 51 is a resonance circuit including a power receiving coil, and is configured to resonate at the same resonance frequency f as the power transmission resonator 21. 0 resonance.

[0042] The power receiving circuit 52 is an electrical circuit provided with 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 through the rectifier, and to supply it to the power load 47 through the DC / DC converter. As the power load 47, for example, a battery, a motor, etc. can be mentioned, but there is no particular limitation. In the present embodiment, the power receiving circuit 52 is connected to a battery as the power load 47. The power receiving circuit 52 is provided with a power receiving side current sensor 54 for detecting the output current I2 of the rectifier (hereinafter referred to as "power receiving side current") and a power receiving side voltage sensor 55 for detecting the output voltage V2 of the rectifier (hereinafter referred to as "power receiving side voltage"). The power receiving side current I2 and the power receiving side voltage V2 detected by the sensors 54 and 55 are respectively input to the vehicle control device 40.

[0043] The power reception-side transmitter 53 wirelessly communicates with the power transmission-side receiver 23 of each power transmission device 2 using a predetermined wireless communication line, and transmits the above-mentioned proximity signal to each power transmission device 2 .

[0044] The vehicle control device 40 is provided with a communication interface 401 , a storage portion 402 , and a vehicle processing portion 403 .

[0045] The communication interface 401 is a communication interface circuit for connecting the vehicle control device 40 to the internal vehicle network 46 .

[0046] The storage section 402 has an HDD or an optical recording medium, a semiconductor memory or other storage medium, and stores various computer programs or data or the like for processing in the vehicle processing section 403 .

[0047] The vehicle processing section 403 has one or more processors and their peripheral circuits. The vehicle processing section 403 runs various types of computer programs stored in the storage section 402 and generally controls the vehicle 4. For example, the vehicle processing section 403 is a CPU.

[0048] For example, if it is detected that the host vehicle 4 is approaching an electrified road, the vehicle processing portion 403 and thus the vehicle control device 40 starts to transmit an approach signal through 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 transmission efficiency η between the resonators is related to the power receiving voltage V2. In this embodiment, the target power receiving voltage V2 tgt is set to a predetermined voltage value at which a desired power transmission efficiency η is obtained tgt .

[0049] Note that the method for detecting approaching an electrified road is not particularly limited. For example, it can be detected based on the current position information and navigation information (driving route) of the vehicle 4, or, if infrastructure installed before the electrified road sends a signal to the passing vehicle 4 notifying that the electrified road will be passed, it can be detected by receiving the signal.

[0050] In this regard, if an abnormality occurs in the power transmission from the power transmission device 2 to the power receiving device 5, since the power transmission device 2 and the power receiving device 5 are physically separated, the dynamic wireless power transmission system 100 must judge whether the cause of the abnormality is located in the power transmission device 2 or in the power receiving device 5. If an abnormality occurs in the power receiving device 5, it will no longer be possible to perform power transmission to the power load 47 of the vehicle 4 in which the power receiving device 5 in which the abnormality occurs is installed, or even if it can be performed, the amount of power transmission will be reduced compared to the normal time. As a result, the operation of the vehicle 4 is likely to be hindered. For this reason, it is desirable to be able to judge the operating state of the power receiving device 5, that is, whether the power receiving device 5 is operating normally or whether an abnormality has occurred in the power receiving device 5.

[0051] Therefore, in the present embodiment, the inspection information related to the inspection date of the power transmission device 2 can be collected at the server 1, the elapsed time T from the inspection date of the power transmission device 2 installed at the abnormality occurrence location to the abnormality occurrence date can be calculated based on the inspection information and the abnormality occurrence information related to the abnormality occurrence location and the abnormality occurrence date, and the operating state of the power receiving device 2 can be judged based on the elapsed time T, where the actual power transmission efficiency η calculated based on the received power P2 [W] received by the power receiving device 5 when traveling on the electrified road at the abnormality occurrence location and the abnormality occurrence date.real Becomes smaller than the predetermined value η1.

[0052] Next, control for judging the operating state of the power receiving device 5 according to this embodiment will be explained.

[0053] Figure 3 1 is a flowchart for explaining the content of processing performed at the server for collecting inspection information related to the inspection date of the power transmission equipment 2 at the server 1 .

[0054] In step S1, the server 1 determines whether it has received inspection information related to the inspection date of the power transmission device 2. The inspection information includes the inspection date of the power transmission device 2 and the installation location of the power transmission device 2, at which the inspection (e.g., regular inspection, etc.) is performed. Each time the power transmission device 2 is inspected, the inspection information may be transmitted to the server 1 from, for example, a terminal owned by an inspector. In addition, if the power transmission device 2 is configured to be able to communicate with the server 1, the fact that the inspection is performed may be detected by the power transmission device 2 and transmitted from the power transmission device 2 to the server 1. If the inspection information is received, the server 1 proceeds to the process of step S2, and if the inspection information is not received, the process is terminated once.

[0055] In step S2, the server 1 stores the inspection information received from the power transmission device 2 in the server storage section 12. In this way, the server 1 collects the inspection information of the power transmission device 2.

[0056] Figure 4 1 is a flowchart for explaining the content of processing performed between the vehicle 4 and the server 1 for judging the operating state of the power receiving device 5 .

[0057] In step S11, the vehicle control device 40 of the vehicle 4 determines whether the host vehicle is traveling on an electrified road based on the current position of the host vehicle and the map information. If the host vehicle is traveling on an electrified road, the vehicle control device 40 of the vehicle 4 proceeds to the process of step S12. On the other hand, if the host vehicle is not traveling on an electrified road, the vehicle control device 40 of the vehicle 4 ends the current process.

[0058] In step S12, the vehicle control device 40 of the vehicle 4 calculates the reception power P2 received by the power receiving device 5 based on the reception current I2 and the reception voltage V2, and divides it by the target transmission power P1. tgt , and thus calculate the power transmission efficiency η real (=P2 / P1 tgt ), and detect and obtain the power transmission efficiency η real The received current I2 and received voltage V2 are determined by the location (driving position) and date.

[0059] Note that if the target transmission power P1 is set as in this embodiment tgt The value of the target power transmission P1 is a fixed value. tgt The value of is stored in the storage section 402 of the vehicle control device 40 of the vehicle 4 to obtain the target transmission power P1 tgt In addition, for example, in the vehicle control device 40 of the vehicle 4, if the required reception power is calculated based on the state of the power load 47 (for example, if the power load 47 is a battery, the battery SOC) and the information related to the required reception power is included in the proximity signal, the required reception power can be made the target transmission power P1. tgt .

[0060] In step S13, the vehicle control device 40 of the vehicle 4 determines the power transmission efficiency η real Is it less than the predetermined value η1(<η tgt ), that is, whether there is a possibility that power transmission is not performed normally. If the power transmission efficiency η real is less than the predetermined value η1, the vehicle control device 40 of the vehicle 4 determines that there is a possibility that the power transmission is not normally performed, and proceeds to the process of step S14. On the other hand, if the power transmission efficiency η real If it is greater than or equal to the predetermined value η1, the vehicle control device 40 of the vehicle 4 ends the current processing.

[0061] In step S14, the vehicle control device 40 of the vehicle 4 sends a signal related to the power transmission efficiency η to the server 1. real The information about the location and date when the abnormality occurs less than the predetermined value η1, that is, the information about the abnormality occurrence location and the abnormality occurrence date (hereinafter referred to as "information about the abnormality occurrence"). Note that the information about the abnormality occurrence also includes the identification information of the vehicle 4 (hereinafter referred to as "delivery vehicle") that transmits the information about the abnormality occurrence, so that the server 1 can identify the delivery vehicle.

[0062] In step S15, the server 1 determines whether it has received information about the occurrence of an abnormality. If the information about the occurrence of an abnormality is received, the server 1 proceeds to the process of step S16. On the other hand, if the information about the occurrence of an abnormality is not received, the server 1 ends the process once.

[0063] In step S16 , the server 1 calculates the elapsed time T from the inspection date of the power transmission device 2 installed at the abnormality occurrence location to the abnormality occurrence date based on the inspection information stored in the server storage section 12 and the received information on the abnormality occurrence.

[0064] In step S17, the server 1 determines whether the elapsed time T is less than a predetermined abnormality determination threshold value Tth. If the elapsed time T is less than the abnormality determination threshold value Tth, the server 1 proceeds to the process of step S18. On the other hand, if the elapsed time T is greater than or equal to the abnormality determination threshold value Tth, the server 1 proceeds to the process of step S21. The abnormality determination threshold value Tth is determined based on statistical data related to the time period from when the inspection of the power transmission device 2 is performed to when the abnormality occurs. For example, in the present embodiment, based on Figure 5 The abnormality determination threshold value Tth is set to an appropriate value based on the distribution graph shown in , specifically, the distribution of the number of power transmission devices 2 in each of the time periods from when the inspection of the power transmission device 2 is performed to when the abnormality occurs.

[0065] In step S18, since the elapsed time T from when the inspection of the power transmission device 2 was performed is less than the abnormality judgment threshold value Tth, the server 1 judges that the possibility of the abnormality occurring in the power transmission device 2 is low, and judges that the abnormality has occurred in the power receiving device 5 of the transmission vehicle 4 that has transmitted the information on the abnormality occurrence.

[0066] In step S19 , the server 1 transmits an abnormality contact notification for notifying the abnormality occurrence at the power receiving device 5 to the delivery vehicle 4 that has transmitted the information on the abnormality occurrence.

[0067] In step S20 , if the abnormality contact notification is received, the vehicle control device 40 of the vehicle 4 notifies the vehicle occupant through the HMI device 44 of the occurrence of the abnormality at the power receiving device 5 of the host vehicle.

[0068] In step S21, since the elapsed time T from when the inspection of the power transmission device 2 was performed is greater than or equal to the abnormality judgment threshold value Tth, the server 1 judges that the possibility of the abnormality occurring at the power transmission device 2 is high, and judges that the power receiving device 5 of the delivery vehicle 4 that has delivered the information on the abnormality occurrence is normal. Note that if the elapsed time T from when the inspection of the power transmission device 2 was performed is greater than or equal to the abnormality judgment threshold value Tth, it is not necessarily necessary to judge that the power receiving device 5 is normal. The processing may be ended without particularly judging the operating state of the power receiving device 4, or the occurrence of the abnormality at the power transmission device 2 installed at the abnormality occurrence location may be judged.

[0069] The server 1 (operation state judgment device) according to the present embodiment explained above is provided with a server processing section 13 (processor), a server communication section 11 (communication means) capable of communicating with a vehicle 4 (mobile body) (the vehicle 4 is provided with a power receiving device 5 for receiving power wirelessly transmitted from a power transmission device 2 installed on a road), and a server storage section 12 (storage means) for storing inspection information related to the inspection date of the power transmission device 2. In addition, the server processing section 13 is configured to calculate an elapsed time T from the inspection date to the abnormality occurrence date of the power transmission device 2 installed at the abnormality occurrence location based on the inspection information and the information on the abnormality occurrence related to the abnormality occurrence location and the abnormality occurrence date received from the vehicle 4 through the server communication section 11, and to judge the operation state of the power receiving device 5 based on the elapsed time T, wherein the power transmission efficiency η of the power transmission device 2 to the power receiving device 5 at the abnormality occurrence location and the abnormality occurrence date is real Becomes smaller than the predetermined value η1.

[0070] Specifically, the server processing part 13 is configured to judge that the operating state of the power receiving device 5 is abnormal if the elapsed time T is less than the abnormal judgment threshold Tth, and to judge that the operating state of the power receiving device 5 is normal or not to judge the operating state of the power receiving device 5 if the elapsed time T is greater than or equal to the abnormal judgment threshold Tth.

[0071] If an abnormality occurs in power transmission from the power transmission device 2 to the power receiving device 5 during a predetermined period of time from the inspection date of the power transmission device 2, there is a high possibility that an abnormality occurs in the power receiving device 5. Therefore, similarly to the present embodiment, by calculating the elapsed time T from the inspection date of the power transmission device 2 installed at the abnormality occurrence position to the abnormality occurrence date, in the case where an abnormality occurs in power transmission from the power transmission device 2 to the power receiving device 5, the operating state of the power receiving device 5 can be judged based on the elapsed time T. That is, if an abnormality occurs in power transmission from the power transmission device 2 to the power receiving device 5, it can be judged whether the power receiving device 5 is operating normally or whether an abnormality occurs in the power receiving device 5.

[0072] Furthermore, in the present embodiment, the abnormality judgment threshold value Tth is determined based on statistical data related to the time period from when the power transmission device 2 is checked to when the abnormality occurs, and therefore the elapsed time T can be compared with the abnormality judgment threshold value Tth to judge the operating state of the power receiving device 5, thereby accurately judging the operating state of the power receiving device 5.

[0073] In addition, the dynamic wireless power transmission system 100 (wireless power transmission system) according to the present embodiment is provided with a vehicle 4 (mobile body) provided with a power receiving device 5 for receiving power wirelessly transmitted from a power transmission device 2 installed on a road and a server 1 storing inspection information related to the inspection date of the power transmission device 2. The vehicle 4 is configured to detect the power transmission efficiency η from the power transmission device 2 to the power receiving device 5. real The abnormality occurrence position and the abnormality occurrence date that become smaller than the predetermined value η1, and transmit information related to the abnormality occurrence position and the abnormality occurrence date to the server 1. The server 1 is configured to calculate the elapsed time T from the inspection date of the power transmission device 2 installed at the abnormality occurrence position to the abnormality occurrence date based on the inspection information and the information on the abnormality occurrence received from the vehicle 4, and judge the operating state of the power receiving device 5 based on the elapsed time T. Therefore, in the case where the abnormality occurs in the power transmission from the power transmission device 2 to the power receiving device 5, the operating state of the power receiving device 5 can be judged.

[0074] The embodiments of the present disclosure are explained above, but the above embodiments only show a part of the application examples of the present disclosure. This does not mean that the technical scope of the present disclosure is limited to the specific configurations of the above embodiments.

[0075] For example, in the above-described embodiment, the inspection information related to the inspection date of the power transmission device 2 is collected at the server 1, but instead of or together with the inspection date, information related to the installation date when the power transmission device 2 is newly installed may be collected at the server 1. Furthermore, the elapsed time from the installation date of the power transmission device 2 installed at the abnormality occurrence location to the abnormality occurrence date may be calculated, and the elapsed time may be compared with the abnormality judgment threshold value to judge whether the power receiving device 2 is abnormal or normal and other operating states of the power receiving device 2. In this case, the abnormality judgment threshold value is determined based on statistical data related to the time period from when the power transmission device 2 is installed on the road to when the abnormality occurs.

[0076] Furthermore, in the above-described embodiment, each power transmission apparatus 2 is provided with the power transmission control device 20 , but a single power transmission control device 20 may also be used to control a plurality of power transmission apparatuses 2 .

Claims

1. An operation status determination device, comprising: processor; a communication device configured to be able to communicate with a mobile body provided with a power receiving device for receiving power wirelessly transmitted from a power transmission device installed on a road; and A storage device configured to store inspection information related to an inspection date or an installation date of the power transmission equipment, wherein The processor is configured to: calculating an elapsed time from an inspection date or an installation date of a power transmission device installed at the abnormality occurrence location based on the inspection information and information on the abnormality occurrence related to an abnormality occurrence location and an abnormality occurrence date at which a power transmission efficiency from the power transmission device to the power receiving device received from the mobile body by the communication device becomes smaller than a predetermined value; and judging the operating state of the power receiving device based on the elapsed time, wherein the processor is configured to judge that the operating state of the power receiving device is abnormal if the elapsed time is less than an abnormality judgment threshold, The abnormality determination threshold is determined based on a statistical value related to a time period from inspection of the power transmission device to occurrence of an abnormality or a time period from installation of the power transmission device on a road to occurrence of an abnormality.

2. The operation status determination device according to claim 1, wherein: The processor is configured to judge that the operation state of the power receiving device is normal or not judge the operation state of the power receiving device if the elapsed time is greater than or equal to an abnormality judgment threshold value.

3. A wireless power transmission system, comprising: a mobile body provided with a power receiving device for receiving power wirelessly transmitted from a power transmission device installed on a road; and a server in which inspection information related to an inspection date or an installation date of the power transmission equipment is stored, wherein The mobile body is configured as follows: detecting an abnormality occurrence position and an abnormality occurrence date at which the power transmission efficiency from the power transmission device to the power receiving device has become less than a predetermined value; and transmitting information related to the abnormality occurrence location and the abnormality occurrence date to the server, and The server is configured to: calculating an elapsed time from an inspection date or an installation date of the power transmission equipment installed at the abnormality occurrence location to a date of the abnormality occurrence based on the inspection information and information on the abnormality occurrence received from the moving body; and determining an operating state of the power receiving device based on the elapsed time, wherein the server is configured to determine that the operating state of the power receiving device is abnormal if the elapsed time is less than an abnormality determination threshold, The abnormality determination threshold is determined based on a statistical value related to a time period from inspection of the power transmission device to occurrence of an abnormality or a time period from installation of the power transmission device on a road to occurrence of an abnormality.

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