WO2020213024A1 - Dispositif de traitement d'informations, procédé de traitement d'informations et programme de traitement d'informations - Google Patents

Dispositif de traitement d'informations, procédé de traitement d'informations et programme de traitement d'informations Download PDF

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Publication number
WO2020213024A1
WO2020213024A1 PCT/JP2019/016111 JP2019016111W WO2020213024A1 WO 2020213024 A1 WO2020213024 A1 WO 2020213024A1 JP 2019016111 W JP2019016111 W JP 2019016111W WO 2020213024 A1 WO2020213024 A1 WO 2020213024A1
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WIPO (PCT)
Prior art keywords
vehicle
information
unit
running
state
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PCT/JP2019/016111
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English (en)
Japanese (ja)
Inventor
政明 武安
進吾 龍
藤岡　宏司
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三菱電機株式会社
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Priority to JP2019540026A priority Critical patent/JP6612003B1/ja
Priority to PCT/JP2019/016111 priority patent/WO2020213024A1/fr
Publication of WO2020213024A1 publication Critical patent/WO2020213024A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/02—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to ambient conditions
    • B60W40/06—Road conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W40/00—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models
    • B60W40/12—Estimation or calculation of non-directly measurable driving parameters for road vehicle drive control systems not related to the control of a particular sub unit, e.g. by using mathematical models related to parameters of the vehicle itself, e.g. tyre models
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W50/00—Details of control systems for road vehicle drive control not related to the control of a particular sub-unit, e.g. process diagnostic or vehicle driver interfaces
    • B60W50/08—Interaction between the driver and the control system
    • B60W50/14—Means for informing the driver, warning the driver or prompting a driver intervention
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
    • F02D29/02—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving vehicles; peculiar to engines driving variable pitch propellers

Definitions

  • the present invention relates to a technique for diagnosing the state of a vehicle element, which is an element of a vehicle.
  • vehicle element an abnormality occurs in an element of the vehicle (hereinafter, referred to as “vehicle element” or simply “element”) while the vehicle is running, the user of the vehicle is notified of the abnormality.
  • the user is notified of the abnormality of the vehicle element by a method such as turning on the warning light on the instrument panel, turning on the indicator light, and outputting the warning sound.
  • the user inspects the vehicle or replaces the vehicle element with the abnormality.
  • the user diagnoses the condition of the vehicle element through daily inspection or periodic inspection, and replaces the element if necessary.
  • the vehicle element is an element mounted, added, mounted, incorporated, filled, or applied to the vehicle. Vehicle elements are affected by the running of the vehicle.
  • vehicle elements are consumed by the running of the vehicle.
  • Vehicle elements include engines, doors, lights, ECUs (Electronic Control Units), mirrors, glass, suspensions, tires, batteries, engine oils, cooling water, brake pads, and the like.
  • ECUs Electronic Control Units
  • replacement of consumables such as engine oil and tires is generally carried out based on a predetermined mileage or usage period.
  • the life of consumables is shortened when special running such as sudden start, sudden braking, and repeated short-distance running is frequently performed. Therefore, it is desirable that the state diagnosis of the vehicle element is performed based on the specific driving environment and driving condition.
  • Patent Document 1 discloses a vehicle condition analysis system. More specifically, in Patent Document 1, traveling environment data, traveling state data, and reference control data related to engine control of a vehicle are collected. Then, the collected driving environment data, driving state data, and reference control data are notified to the vehicle management center. The vehicle management center compares the reference control data notified from the vehicle with the standard control data of the vehicle to diagnose whether or not there is an abnormality in the vehicle. Then, the vehicle management center requests the user to inspect the vehicle or repair the failure according to the diagnosis result.
  • Patent Document 1 it is determined whether or not the vehicle element is abnormal by comparing the control amount with respect to the vehicle element with the standard value.
  • vehicle elements such as tires and brake pads whose control amount cannot be calculated.
  • a standard value as a diagnostic standard for vehicle elements such as engine oil and cooling water whose condition cannot be directly observed.
  • a method of detecting the generation of vibration or abnormal noise due to an abnormality of the vehicle element by attaching a sensor to the vehicle element is also being studied.
  • there are some vehicle elements where it is difficult to attach the sensor, and it is difficult to apply the method to all vehicle elements.
  • the present invention has been made in view of such circumstances, and a main object of the present invention is to obtain a configuration capable of accurately diagnosing the state of a vehicle element.
  • the information processing device is An information acquisition unit that acquires behavior history information that shows the history of the behavior of the vehicle while it is running, An influence estimation unit that estimates the influence of the running of the vehicle on the vehicle element, which is an element of the vehicle, based on the history of the running behavior of the vehicle shown in the behavior history information. It has a diagnostic unit that diagnoses the state of the vehicle element based on the effect of the running of the vehicle on the vehicle element estimated by the effect estimation unit.
  • the state of vehicle elements can be accurately diagnosed.
  • FIG. 1 The figure which shows the structural example of the diagnostic system which concerns on Embodiment 1.
  • FIG. The figure which shows the example of the vehicle management information which concerns on Embodiment 1.
  • FIG. 1 The figure which shows the example of the diagnosis result information which concerns on Embodiment 1.
  • FIG. 1 The figure which shows the example of the vehicle element management information which concerns on Embodiment 1.
  • FIG. The flowchart which shows the operation example of the server apparatus which concerns on Embodiment 1.
  • the flowchart which shows the example of the learning process which concerns on Embodiment 1.
  • the flowchart which shows the example of the model generation processing which concerns on Embodiment 1.
  • FIG. The figure which shows the example of the diagnostic model information which concerns on Embodiment 1.
  • FIG. 1 The figure which shows the example of the diagnosis result information which concerns on Embodiment 1.
  • FIG. 1 The figure which shows the example of the vehicle element management information which concerns on Embodiment 1.
  • FIG. The figure which shows the functional structure example of the vehicle-mounted device which concerns on Embodiment 2.
  • FIG. 1 shows a configuration example of the diagnostic system 500 according to the present embodiment.
  • the diagnostic system 500 includes a server device 100 and a plurality of in-vehicle devices 300.
  • the in-vehicle device 300 is mounted on the vehicle 200. In FIG. 1, only two vehicles 200 are drawn, but the number of vehicles 200 is not limited to two.
  • the server device 100 is an example of an information processing device.
  • the operation performed by the server device 100 is an example of an information processing method and an information processing program.
  • the server device 100 and the in-vehicle device 300 communicate with each other.
  • the server device 100 and the in-vehicle device 300 communicate using a mobile communication network such as a wireless LAN (Local Area Network) such as Wi-Fi, 3G, or LTE (Long Term Evolution) (registered trademark).
  • the server device 100 receives the behavior history information indicating the history of the behavior of the vehicle 200 during traveling from the vehicle-mounted device 300.
  • the behavior of the vehicle 200 during traveling is the reaction of the vehicle 200 to the driver's operation and the reaction of the vehicle 200 to the action from the traveling environment such as the road surface.
  • the server device 100 performs analysis using the behavior history information, diagnoses the state of the vehicle element, and notifies the in-vehicle device 300 of the diagnosis result. Details of the behavior history information will be described later.
  • FIG. 2 shows a hardware configuration example of the server device 100.
  • the server device 100 is a computer.
  • the server device 100 includes a processor 911, a main storage device 912, an auxiliary storage device 913, and a communication device 914 as hardware. Further, as shown in FIG. 4, the server device 100 includes an information acquisition unit 101, an information storage unit 102, a diagnostic model generation unit 103, a diagnostic model storage unit 104, an effect estimation unit 105, and a diagnostic unit 106 as functional configurations. ..
  • the functional configuration of the server device 100 will be described later.
  • the auxiliary storage device 913 stores programs that realize the functions of the information acquisition unit 101, the diagnostic model generation unit 103, the effect estimation unit 105, and the diagnostic unit 106. These programs are loaded from the auxiliary storage device 913 into the main storage device 912. Then, the processor 911 executes these programs to operate the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, and the diagnostic unit 106, which will be described later.
  • FIG. 2 schematically shows a state in which the processor 911 is executing a program that realizes the functions of the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, and the diagnostic unit 106.
  • the information storage unit 102 and the diagnostic model storage unit 104 are realized by the main storage device 912 or the auxiliary storage device 913.
  • FIG. 3 shows an example of the hardware configuration of the in-vehicle device 300.
  • the in-vehicle device 300 is a computer.
  • the in-vehicle device 300 includes a processor 931, a main storage device 932, an auxiliary storage device 933, and a communication device 934 as hardware.
  • the in-vehicle device 300 has a communication unit 301, a diagnosis notification display unit 302, an element notification information acquisition unit 303, a behavior history information generation unit 304, a sensor information collection unit 305, and a vehicle control as functional configurations.
  • a unit 306 and a storage unit 307 are provided.
  • the auxiliary storage device 933 stores programs that realize the functions of the communication unit 301, the diagnosis notification display unit 302, the element notification information acquisition unit 303, the behavior history information generation unit 304, the sensor information collection unit 305, and the vehicle control unit 306. ing. These programs are loaded from the auxiliary storage device 933 into the main storage device 932. Then, the processor 931 executes these programs to operate the communication unit 301, the diagnosis notification display unit 302, the element notification information acquisition unit 303, the behavior history information generation unit 304, the sensor information collection unit 305, and the vehicle control unit 306, which will be described later. I do. In FIG.
  • the processor 931 executes a program that realizes the functions of the communication unit 301, the diagnosis notification display unit 302, the element notification information acquisition unit 303, the behavior history information generation unit 304, the sensor information collection unit 305, and the vehicle control unit 306.
  • the state of being in the state is schematically represented.
  • the storage unit 307 is realized by the main storage device 932 or the auxiliary storage device 933.
  • FIG. 4 shows an example of the functional configuration of the server device 100.
  • the information acquisition unit 101 acquires vehicle management information, element notification information, and behavior history information from the in-vehicle device 300.
  • the vehicle management information is, for example, the information shown in FIG. Details of the vehicle management information will be described later.
  • the element notification information is, for example, the information shown in FIG. 7. Details of the element notification information will be described later.
  • the behavior history information is, for example, the information shown in FIG. Details of the behavior history information will be described later.
  • the process performed by the information acquisition unit 101 corresponds to the information acquisition process.
  • the information storage unit 102 stores the vehicle management information, the element notification information, and the behavior history information acquired by the information acquisition unit 101. Further, the information storage unit 102 stores the diagnosis result information and the vehicle element management information generated by the diagnosis unit 106 each time the diagnosis unit 106 is diagnosed.
  • the diagnosis result information is, for example, the information shown in FIG. Details of the diagnosis result information will be described later.
  • the vehicle element management information is, for example, the information shown in FIG. The details of the vehicle element management information will be described later.
  • the diagnostic model generation unit 103 generates a diagnostic model using the behavior history information and the element state information.
  • the element state information indicates the state of the vehicle element.
  • the element state information is, for example, the information shown in FIG.
  • the diagnostic model generation unit 103 generates a diagnostic model by learning the influence of the traveling condition of the vehicle 200 and the traveling environment of the vehicle 200 on the vehicle elements.
  • the traveling condition is a characteristic of the vehicle 200 such as many / few sudden starts and many / few sudden brakings.
  • the traveling environment is an environment in which the vehicle 200 travels, such as traveling on a rough road, traveling on an uphill / downhill road, or traveling at night.
  • the diagnostic model generation unit 103 analyzes the correlation between the traveling condition information, the traveling environment information, the vehicle-specific information, and the element state information with reference to the diagnostic model generation rule, and generates the diagnostic model. Details of driving status information, driving environment information, and vehicle-specific information will be described later.
  • the diagnostic model generation unit 103 analyzes the correlation by using a general machine learning method such as a random forest, an SVM (Support Vector Machine), or a neural network.
  • the diagnostic model generation rule indicates the diagnostic model generation unit.
  • the generation unit of the diagnostic model is the area where the vehicle 200 is used, the type of the vehicle element, the vehicle type, the model year of the vehicle 200, and the like. The area is a country, a city, or the like where the vehicle 200 is used.
  • the type of vehicle element includes the manufacturer of the vehicle element, the product name of the vehicle element, the date of manufacture, and the like.
  • the diagnostic model is used when the influence estimation unit 105 estimates the influence of the running of the vehicle 200 on the vehicle elements. Details of the diagnostic model will be described later.
  • the diagnostic model storage unit 104 stores the diagnostic model generated by the diagnostic model generation unit 103.
  • the influence estimation unit 105 estimates the influence of the running of the vehicle 200 on the vehicle elements based on the history of the running behavior of the vehicle 200 shown in the behavior history information.
  • the influence of the running of the vehicle 200 on the vehicle element is a change in the physical quantity related to the vehicle element. Changes in physical quantities include changes in temperature, current value, voltage value, and dimensions.
  • the change in the physical quantity related to the vehicle element estimated by the influence estimation unit 105 is referred to as a change in the state value of the vehicle element, and the amount of change in the state value is referred to as a state change amount.
  • the depth of the tire groove is the state value of the tire
  • the amount of change in the depth of the tire groove is the amount of change in the state of the tire.
  • the thickness of the brake pad is the state value of the brake pad
  • the amount of change in the thickness of the brake pad is the amount of change in the state of the brake pad
  • the remaining amount of the battery liquid is the state value of the battery liquid
  • the amount of change in the remaining amount of the battery liquid is the amount of change in the state of the battery liquid.
  • the diagnosis unit 106 diagnoses the state of the vehicle element based on the amount of change in the state of the vehicle element derived by the effect estimation unit 105. Then, the diagnosis unit 106 transmits a diagnosis notification indicating the diagnosis result to the in-vehicle device 300. The process performed by the diagnostic unit 106 corresponds to the diagnostic process.
  • the communication unit 301 communicates with the server device 100. Specifically, the communication unit 301 transmits vehicle management information, element notification information, and behavior history information to the server device 100. Further, the communication unit 301 receives the diagnosis notification from the server device 100.
  • the diagnosis notification display unit 302 displays the diagnosis notification received by the communication unit 301. As a result, the user of the vehicle 200 can know whether the vehicle elements need to be inspected or replaced.
  • the diagnosis notification display unit 302 may be realized by, for example, a car navigation device.
  • the element notification information acquisition unit 303 reads out the vehicle management information and the element notification information to be transmitted to the server device 100 from the storage unit 307.
  • the element notification information acquisition unit 303 outputs the read vehicle management information and the element notification information to the communication unit 301.
  • the behavior history information generation unit 304 generates behavior history information to be transmitted to the server device 100.
  • the behavior history information generation unit 304 outputs the generated behavior history information to the communication unit 301.
  • the sensor information collecting unit 305 collects sensor information from a sensor (not shown) arranged in the vehicle 200.
  • the sensor information collecting unit 305 collects sensor information from sensors such as a vehicle front camera, a vehicle rear camera, LIDAR, sonar, a V2X on-board unit, an illuminance sensor, a rain sensor, and a locator.
  • the vehicle control unit 306 controls the vehicle 200.
  • the vehicle control unit 306 controls engine control, brake control, steering control, headlight control, and the like.
  • the storage unit 307 stores vehicle management information and element notification information.
  • the vehicle management information is, for example, the information shown in FIG.
  • Vehicle management information includes vehicle ID, region and spec information.
  • the vehicle ID is an identifier that can uniquely identify the vehicle 200.
  • the vehicle ID is, for example, a vehicle identification number.
  • the area is the traveling area of the vehicle 200. The area may be specified by the city name or may be specified by the location information such as latitude and longitude.
  • the spec information for example, the vehicle weight, the vehicle length, the vehicle width, the wheel alignment, and the like of the vehicle 200 are shown.
  • the element notification information is, for example, the information shown in FIG. 7.
  • the element notification information indicates an element ID, an element type ID, and a vehicle element use start date.
  • the element ID is an identifier that can uniquely identify the vehicle element.
  • the element type ID is information that uniquely identifies a product arranged in the vehicle 200 as a vehicle element.
  • the element ID is the name of a vehicle element such as a tire, a battery, or a brake.
  • the element type ID is an identifier for identifying the manufacturer, product name, etc. of the vehicle element.
  • the element type ID is, for example, a product number.
  • the use start date indicates the date and time when the use of the vehicle element is started.
  • the element notification information is written in the storage unit 307, for example, when the vehicle 200 is manufactured or when the vehicle element is replaced.
  • FIG. 12 shows an outline of the operation of the server device 100.
  • the operation of the server device 100 is divided into a learning process (step S11) and a diagnostic process (step S12).
  • the diagnostic model generation unit 103 In the learning process (step S11), the diagnostic model generation unit 103 generates a diagnostic model by learning the influence of the traveling condition of the vehicle 200 and the traveling environment of the vehicle 200 on the vehicle elements. In the diagnostic process (step S12), the impact estimation unit 105 derives the amount of state change of the vehicle element using the diagnostic model. Further, in the diagnosis process (step S12), the diagnosis unit 106 diagnoses the state of the vehicle element based on the amount of change of state, and notifies the in-vehicle device 300 of the diagnosis result.
  • FIG. 13 shows the details of the learning process (step S11).
  • the information acquisition unit 101 acquires element state information (before traveling) from the in-vehicle device 300 (step S111). Then, the information acquisition unit 101 outputs the acquired element state information (before traveling) to the diagnostic model generation unit 103.
  • the element state information (before traveling) is element state information obtained before the vehicle 200 travels.
  • the element state information is, for example, the information shown in FIG.
  • the element state information describes the vehicle elements in the vehicle 200. In the example of FIG. 11, tires, batteries, brake pads and engine oil are described. The vehicle elements are not limited to these. Further, the element state information describes the state quantity of the vehicle element. In the example of FIG. 11, the value of the depth of the tire groove is described as the state quantity of the tire. Other states include the thickness of the brake pad, the deteriorated state of the battery (State of Health, SOH), the charged state (State of Charge, SOC), the amount and components of engine oil and cooling water, and the like. The state quantity is not limited to these. In addition, the element state information includes the use start date of the vehicle element and the collection date and time of the state quantity.
  • the element state information is generated by the behavior history information generation unit 304 of the vehicle-mounted device 300.
  • the behavior history information generation unit 304 generates element state information using the sensor information collected by the sensor information collection unit 305 or the measured value measured by the user.
  • the behavior history information generation unit 304 uses the sensor information collected by the sensor information collection unit 305 for the state value that can be measured by the sensor. On the other hand, for the state value that cannot be measured by the sensor, the measured value measured by the user is used.
  • the user measures the state value of the vehicle element using, for example, a gauge or the like.
  • the communication unit 301 transmits the element state information (before traveling) to the server device 100, and the information acquisition unit 101 receives the element state information (before traveling) in the server device 100.
  • the information acquisition unit 101 acquires the behavior history information (step S112). Then, the information acquisition unit 101 outputs the acquired behavior history information to the diagnostic model generation unit 103.
  • the behavior history information is, for example, the information shown in FIG.
  • the behavior history information shows the history of the running behavior of the running vehicle 200.
  • changes with time of state values such as a headlight state, a blinker state, an accelerator position, a brake position, and a shift lever position are described.
  • changes with time such as vehicle speed and steering drive angle are also described as the history of the behavior of the vehicle 200.
  • a change with time of the sensor value measured by the vehicle height sensor, the acceleration sensor, or the like is also described.
  • the behavior history information includes obstacles detected by the vehicle front camera and the like, pedestrians, the current position acquired by the locator, map information output from the car navigation device, passenger status output from the driver monitoring device, and the like. May be included.
  • the behavior history information is time-series data, and the in-vehicle device 300 collects the state at a cycle determined for each item. For example, state values such as a headlight state, a blinker state, an accelerator position, a brake position, and a shift lever position are collected in a cycle of 100 ms. On the other hand, state values such as steering and steering drive angle are collected in a cycle of, for example, 10 ms.
  • the behavior history information generation unit 304 generates the behavior history information.
  • the behavior history information generation unit 304 generates behavior history information using, for example, the sensor information collected by the sensor information collection unit 305. Further, the behavior history information generation unit 304 generates behavior history information using the control values output by the vehicle control unit 306 for controlling the vehicle 200. Then, the communication unit 301 of the in-vehicle device 300 transmits the behavior history information, and the information acquisition unit 101 of the server device 100 receives the behavior history information.
  • the information acquisition unit 101 acquires element state information (after traveling) from the in-vehicle device 300 (step S113). Then, the information acquisition unit 101 outputs the acquired element state information (after running) to the diagnostic model generation unit 103.
  • the element state information (after traveling) acquired in step S113 describes the state of the vehicle element after traveling.
  • the element state information (after running) acquired in step S113 has the same configuration itself as the element state information (before running) acquired in step S111. However, the state amount shown in the element state information (after running) may be different from the state amount in the element state information (before running). For example, the depth of the tire groove may be shallower due to running in the element state information (after running).
  • the above steps S111 to S113 are performed on a plurality of vehicles 200.
  • the element state information (before traveling), the behavior history information, and the element state information (after traveling) obtained from the in-vehicle devices 300 of the plurality of vehicles 200 are stored in the storage area assigned to the diagnostic model generation unit 103.
  • step S114 is performed.
  • the diagnostic model generation unit 103 analyzes the correlation between the element state information (before running), the behavior history information, and the element state information (after running), and generates a diagnostic model. The details of the process of generating the diagnostic model will be described with reference to FIG.
  • the diagnostic model generation unit 103 generates driving information, environmental information, and vehicle-specific information from the behavior history information for each vehicle 200 (step S1151).
  • the travel information describes the amount of change in vehicle speed, acceleration, total mileage, and the like of the vehicle 200.
  • the vibration amount of the vehicle 200, the inclination angle of the road surface, and the like are described in the environmental information.
  • the gross vehicle weight and the like are described in the vehicle-specific information.
  • the diagnostic model generation unit 103 can obtain the amount of change in vehicle speed, for example, by obtaining the difference in vehicle speed in a unit time. Further, the diagnostic model generation unit 103 can obtain the vibration amount of the vehicle 200 by obtaining the degree of change in the vehicle height of the vehicle 200 from the measured values of the vehicle height sensor and the acceleration sensor.
  • the diagnostic model generation unit 103 obtains the total weight of the passengers by using the number of passengers of the vehicle 200 and the average weight value of each passenger, and adds the obtained total weight to the vehicle weight value. , Gross vehicle weight can be obtained. Further, if the server device 100 retains the relationship information between the change amount of the output value of the vehicle height sensor and the load capacity, the diagnostic model generation unit 103 obtains the total weight of the occupants from the output value of the vehicle height sensor. Can be done.
  • the traveling information, the environmental information, and the vehicle-specific information are information on the amount of change obtained by sampling the behavior history information, which is time-series data, at regular time intervals. That is, the traveling information, the environmental information, and the vehicle-specific information are also time-series data.
  • the diagnostic model generation unit 103 generates driving status information and driving environment information for each vehicle 200 (step S1152).
  • the diagnostic model generation unit 103 determines the traveling condition and the traveling environment of the vehicle 200 from the behavior history information and the traveling information and the environmental information generated in step S1152.
  • the traveling condition is, for example, a characteristic in the traveling of the vehicle 200 such as a sudden start frequency, a sudden braking frequency, a sharp curve frequency, a low speed traveling frequency, and a short distance traveling frequency.
  • the traveling environment is a feature of the environment in which the vehicle 200 travels, such as the frequency of traveling on rough roads, the frequency of traveling on uphill and downhill roads, and the frequency of traveling at night.
  • the diagnostic model generation unit 103 can determine the sudden start frequency from the amount of change in vehicle speed when the accelerator pedal is operated.
  • the diagnostic model generation unit 103 can determine the frequency of sudden braking from the amount of change in vehicle speed when the brake pedal is operated. In addition, the diagnostic model generation unit 103 can determine the frequency of sharp curves by accelerating in the horizontal direction during steering operation. Further, the diagnostic model generation unit 103 can determine the rough road traveling time from the vibration amount and calculate the ratio of the rough road traveling time to the total traveling time to obtain the rough road traveling frequency. In addition, the diagnostic model generation unit 103 can determine the up / down slope running time from the road surface inclination rate and calculate the ratio of the up / down slope running time to the total running time to obtain the up / down slope running frequency.
  • the diagnostic model generation unit 103 can determine the headlight usage time and calculate the ratio of the headlight usage time to the total running time to obtain the nighttime running frequency.
  • the diagnostic model generation unit 103 generates information indicating the sudden start frequency, the sudden braking frequency, the sharp curve frequency, etc. calculated as described above as the running condition information. Further, the diagnostic model generation unit 103 generates information indicating the rough road running frequency, the up / down slope running frequency, the night running frequency, etc. calculated as described above as the running environment information.
  • the driving situation information and the driving environment information are information indicating frequency or ratio, and are not time series data. It should be noted that each of the sudden start frequency, the sudden braking frequency, and the sharp curve frequency may be classified into a plurality of categories such as large, medium, and small according to the magnitude of the degree.
  • the diagnostic model generation unit 103 associates the vehicle-specific information obtained in step S1151 with the traveling situation information and driving environment information obtained in step S1152 for each vehicle 200.
  • the diagnostic model generation unit 103 classifies the information (step S1153). Specifically, the diagnostic model generation unit 103 uses the element type ID to obtain the driving status information, the driving environment information, the vehicle-specific information, the element state information (before running) and the element state information (after running). Classify by. Further, the diagnostic model generation unit 103 classifies the driving situation information, the driving environment information, the vehicle-specific information, the element state information (before traveling) and the element state information (after traveling) for each area based on the traveling area of each vehicle 200. To do. For example, if the vehicle management information shown in FIG. 6 is received together with the element state information (before traveling) in step S111 of FIG. 13, the diagnostic model generation unit 103 can obtain the traveling area of the vehicle 200.
  • the diagnostic model generation unit 103 classifies the information collected by the plurality of vehicles 200 by element type-region.
  • the diagnostic model generation unit 103 classifies the information according to the element type-region, but the information may be classified only by the element type.
  • the diagnostic model generation unit 103 may classify the information by another classification method. For example, the diagnostic model generation unit 103 may identify the vehicle type or model year from the vehicle ID and classify the information by vehicle type or model year.
  • the diagnostic model generation unit 103 generates a diagnostic model (step S1154). Specifically, the diagnostic model generation unit 103 generates a diagnostic model according to the classification performed in step S1153. In the above example, the diagnostic model generation unit 103 generates a diagnostic model according to the element type-classification for each region.
  • the diagnostic model generation unit 103 analyzes the correlation between the traveling condition information, the traveling environment information, and the vehicle-specific information with the element state information (before traveling) and the element state information (after traveling), and generates a diagnostic model.
  • the diagnostic model generation unit 103 analyzes the correlation by using a general machine learning method such as a random forest, an SVM, or a neural network.
  • the diagnostic model generation unit 103 generates, as a diagnostic model, a model in which the amount of state change of the vehicle element is output when the traveling situation information, the traveling environment information, and the vehicle-specific information are input. For example, if the tire is the target of diagnosis, when the sudden start frequency, sudden braking frequency, sharp curve frequency (driving situation information), rough road driving frequency (driving environment information), and gross vehicle weight (vehicle-specific information) are input. Generate a diagnostic model that outputs the amount of change in the tire groove (amount of change in state).
  • the diagnostic model generation unit 103 may perform learning by using the amount of change (numerical value) of the state value between the element state information (before running) and the element state information (after running) as it is. Further, the diagnostic model generation unit 103 performs learning after classifying the amount of change in the state value between the element state information (before running) and the element state information (after running) into categories such as large, medium, and small. You may.
  • the diagnostic model generation unit 103 can apply a method suitable for each vehicle element based on the correlation analysis result.
  • the diagnostic model generation unit 103 performs principal component analysis based on the driving situation information, the driving environment information, and the vehicle-specific information, and then the element state information (before traveling) and the element state information (after traveling). ) And the correlation between the amount of change in the state value and the result of the principal component analysis may be learned.
  • the diagnostic model generation unit 103 can learn by using the result of performing the principal component analysis for each of the traveling situation information, the traveling environment information, and the vehicle-specific information. More specifically, the diagnostic model generation unit 103 performs principal component analysis based on the sudden start frequency, the sudden braking frequency, and the sharp curve frequency of the traveling condition information acquired from the plurality of vehicles 200, and the value indicating the traveling condition. Ask for.
  • the diagnostic model generation unit 103 learns the correlation between the obtained value indicating the running situation and the amount of change in the state value between the element state information (before running) and the element state information (after running).
  • the diagnostic model generation unit 103 may perform principal component analysis based on the frequency of sudden braking and the frequency of sharp curves to obtain the degree of influence of the controlling driving force. In this case, the diagnostic model generation unit 103 learns the correlation between the degree of influence of the controlling driving force and the amount of change in the state value between the element state information (before running) and the element state information (after running).
  • the diagnostic model generation unit 103 stores the generated diagnostic model in the diagnostic model storage unit 104. Further, the diagnostic model generation unit 103 generates the diagnostic model information shown in FIG. 16 and stores the generated diagnostic model information in the diagnostic model storage unit 104.
  • the diagnostic model information is information for managing a diagnostic model applied to each category in the vehicle type, model year, vehicle element, region, and the like. In the example of FIG. 16, a diagnostic model applied to the 2017 vehicle model: XXXX is shown. In the example of FIG. 16, a diagnostic model applied by vehicle element-region is shown. In the diagnostic process described later, the diagnostic unit 106 can specify the diagnostic model to be applied by referring to the diagnostic model information.
  • FIG. 17 shows the details of the diagnostic process (S12 in FIG. 12). Steps S121 and S122 are processes performed before the vehicle 200 travels. Further, steps S123 and S124 are processes performed after the vehicle 200 has traveled.
  • the element notification information acquisition unit 303 reads the vehicle management information and the element notification information from the storage unit 307, for example, triggered by the engine start or the door unlocking. Then, the element notification information acquisition unit 303 outputs the vehicle management information and the element notification information to the communication unit 301. Then, the communication unit 301 transmits the vehicle management information and the element notification information to the server device 100.
  • the vehicle management information is the information shown in FIG.
  • the element notification information is the information shown in FIG.
  • the information acquisition unit 101 receives the vehicle management information and the element notification information transmitted from the vehicle-mounted device 300 (step S121).
  • the information acquisition unit 101 stores the received vehicle management information and element notification information in the information storage unit 102, and outputs the received vehicle management information and element notification information to the impact estimation unit 105.
  • the diagnosis unit 106 performs element state diagnosis (before traveling) (step S122).
  • the diagnosis unit 106 performs element state diagnosis (before traveling) by using the vehicle element management information at the time of the previous diagnosis held by the information storage unit 102 and the element notification information received in step S121.
  • the vehicle element management information is the information shown in FIG.
  • the vehicle element management information indicates an element ID, an element type ID, a use start date, a final diagnosis date, and a diagnosis model version.
  • the element ID, the element type ID, and the usage start date are the same as those shown in the element notification information of FIG.
  • the final diagnosis date indicates the date and time when the diagnosis unit 106 last diagnosed the vehicle element with respect to the target vehicle 200.
  • the diagnostic model version indicates the version of the diagnostic model to be applied for each vehicle element. The details of the element state diagnosis process (before traveling) will be described with reference to FIG.
  • the diagnosis unit 106 compares the use start date of the element notification information (FIG. 7) received in step S121 with the final diagnosis date of the vehicle element management information (FIG. 10) for each vehicle element (step S1221). ..
  • the diagnosis unit 106 When the use start date is newer than the final diagnosis date in any of the vehicle elements (YES in step S1221), the diagnosis unit 106 initializes the cumulative change amount of the corresponding vehicle element in the diagnosis result information (FIG. 9). (Step S1222). If the start date is newer than the final diagnosis date, it is considered that the corresponding vehicle element has been replaced. Therefore, the diagnosis unit 106 initializes the cumulative change amount of the diagnosis result information (FIG. 9).
  • the cumulative change amount is a cumulative value of the state change amount from the first running of the vehicle 200 or the replacement of vehicle elements. For example, the cumulative change in tires is the total reduction in tire grooves from the first run of the vehicle 200 or tire replacement.
  • step S1223 is performed. Further, the process of step S1223 is also performed after the process of step S1222 is performed.
  • step S1223 the diagnosis unit 106 determines whether or not the cumulative change amount of the diagnosis result information (FIG. 9) exceeds the threshold value for each vehicle element. That is, the diagnosis unit 106 determines whether or not the maintenance / inspection threshold value or the replacement threshold value of the diagnosis result information (FIG. 9) is “exceeded”.
  • the diagnosis unit 106 ends the process.
  • the diagnosis unit 106 transmits a diagnosis notification (before traveling) to the in-vehicle device 300.
  • the diagnostic unit 106 displays a diagnostic notification (before running) with the message "Let's inspect the front right tire”. Is transmitted to the in-vehicle device 300.
  • the communication unit 301 receives the diagnosis notification (before traveling), and the diagnosis notification display unit 302 displays the message of the diagnosis notification (before traveling).
  • the information acquisition unit 101 acquires the behavior history information in step S123 of FIG. That is, the information acquisition unit 101 receives the behavior history information from the in-vehicle device 300.
  • the behavior history information generation unit 304 generates behavior history information at regular intervals based on the control values of the vehicle control unit 306 and the sensor information collected by the sensor information collection unit 305 while the vehicle 200 is traveling. .. Further, the behavior history information generation unit 304 stores the generated behavior history information in a default storage area. Then, when the running of the vehicle 200 is completed, the communication unit 301 collectively transmits the accumulated behavior history information to the server device 100.
  • the communication unit 301 determines, for example, the end of traveling of the vehicle 200 by stopping the engine, operating the brake pedal, or operating the side brake. Instead of this, the behavior history information generation unit 304 generates the behavior history information at a fixed cycle, and the communication unit 301 transmits the generated behavior history information every time the behavior history information is generated. Good.
  • the behavior history information is the information shown in FIG.
  • the information acquisition unit 101 stores the received behavior history information in the information storage unit 102.
  • the impact estimation unit 105 and the diagnosis unit 106 perform element state diagnosis processing (after running) (step S124). That is, the impact estimation unit 105 derives the amount of state change for each vehicle element using the diagnostic model. Further, the diagnosis unit 106 makes a diagnosis for each vehicle element by using the state change amount derived by the influence estimation unit 105.
  • the details of the element state diagnosis process (after traveling) will be described with reference to FIG.
  • the impact estimation unit 105 generates driving information, environmental information, and vehicle-specific information from the behavior history information (step S1241).
  • the method of generating the traveling information, the environmental information and the vehicle-specific information is as described above. That is, the impact estimation unit 105 generates the driving information, the environmental information, and the vehicle-specific information in the same manner as the method of generating the driving information, the environmental information, and the vehicle-specific information by the diagnostic model generation unit 103 at the time of generating the diagnostic model.
  • the impact estimation unit 105 generates driving situation information and driving environment information (step S1242).
  • the method of generating the driving situation information and the driving environment information is as described above. That is, the influence estimation unit 105 generates the driving situation information and the driving environment information by the same method as the method of generating the driving situation information and the driving environment information by the diagnostic model generation unit 103 at the time of generating the diagnostic model.
  • the impact estimation unit 105 associates the vehicle-specific information obtained in step S1241 with the driving situation information and driving environment information obtained in step S1242.
  • the impact estimation unit 105 derives the amount of state change for each vehicle element (step S1243).
  • the influence estimation unit 105 derives the amount of state change for each vehicle element by using the traveling condition information, the traveling environment information, and the vehicle-specific information and the diagnostic model stored in the diagnostic model storage unit 104. That is, the influence estimation unit 105 acquires the diagnostic model described in the diagnostic model information (FIG. 16) from the diagnostic model storage unit 104, and uses the acquired diagnostic model to derive the amount of state change for each vehicle element. .. If the diagnostic model to be applied is a diagnostic model obtained based on the category classification, the amount of state change output from the diagnostic model is expressed in categories such as large, medium, and small. In the following, for the sake of simplification of the explanation, the explanation will proceed using an example in which a numerical value can be obtained as the amount of change of state.
  • the impact estimation unit 105 outputs the obtained state change amount of each vehicle element to the diagnosis unit 106.
  • the diagnosis unit 106 diagnoses the state for each vehicle element (step S1244).
  • the diagnosis unit 106 adds the state change amount derived by the effect estimation unit 105 to the cumulative change amount of the diagnosis result information (FIG. 9).
  • the cumulative change amount of the diagnosis result information (FIG. 9) is the cumulative change amount obtained at the time of the previous diagnosis, that is, before the start of traveling of the vehicle 200. That is, the cumulative change amount of the diagnosis result information (FIG. 9) is the cumulative value of the state change amount of the vehicle element from the first running of the vehicle 200 to the previous diagnosis.
  • the maintenance / inspection threshold value is a threshold value for transmitting a message prompting the user of the vehicle 200 for maintenance / inspection of the vehicle element.
  • the exchange threshold value is a threshold value for transmitting a message prompting the user of the vehicle 200 to exchange the vehicle element.
  • the diagnostic unit 106 determines that maintenance and inspection of the tire is necessary. Further, when the new cumulative change amount exceeds 6 mm, the diagnostic unit 106 determines that the tire needs to be replaced.
  • the diagnosis unit 106 predicts the timing when the maintenance / inspection of the vehicle element is required.
  • the diagnostic unit 106 predicts, for example, at least one of the mileage and the period until the vehicle element needs to be replaced as the timing when the maintenance and inspection of the vehicle element is required.
  • the new cumulative amount of change is 4.98 mm.
  • the amount of state change this time is 0.2 ⁇ m / km. In this case, the remaining amount up to the maintenance inspection threshold is 0.02 mm.
  • the diagnosis unit 106 determines that maintenance and inspection are required at the stage of traveling 100 km. If the average daily mileage of the vehicle 200 is known, the diagnostic unit 106 may divide 100 km by the average mileage to obtain the number of days until maintenance and inspection are required. The above has described an example of calculating the mileage or period until maintenance and inspection of the vehicle element is required, but the diagnostic unit 106 uses the same procedure to calculate the mileage until the vehicle element needs to be replaced. Or the period can be predicted.
  • the diagnosis unit 106 diagnoses the state of the vehicle element as follows, for example.
  • the diagnosis unit 106 holds a conversion table between categories and numerical values.
  • the conversion table for example, 0.3 ⁇ m / km is defined as a numerical value corresponding to the category “large”. Further, 0.2 ⁇ m / km is defined as a numerical value corresponding to the category “medium”. Further, 0.1 ⁇ m / km is defined as a numerical value corresponding to the category “small”.
  • the diagnosis unit 106 obtains a numerical value of the amount of change of state by using the category value notified from the influence estimation unit 105, the mileage obtained from the behavior history information, and the conversion table. After that, the diagnosis unit 106 adds the obtained numerical value of the state change amount to the cumulative change amount of the diagnosis result information (FIG. 9).
  • the diagnosis unit 106 generates a diagnosis notification (after running) that notifies the diagnosis result. Then, the diagnosis unit 106 transmits the generated diagnosis notification to the in-vehicle device 300. For example, if the new cumulative amount of change in the tire (front right) exceeds the maintenance inspection threshold, the diagnostic unit 106 will display a diagnostic notification (after running) with the message "Let's inspect the front right tire”. ) Is generated. Further, for example, when the new cumulative change amount of the tire (front right) exceeds the replacement threshold value, the diagnosis unit 106 displays a diagnostic notification (running) in which the message "Let's replace the front right tire" is displayed. Later) is generated.
  • the diagnostic unit 106 sends a message "Let's inspect the front right tire after traveling 100 km”. Generate the indicated diagnostic notification (after driving). Further, for example, when the new cumulative change amount of the tire (front right) does not exceed the replacement threshold value, the diagnostic unit 106 indicates a message "Let's replace the front right tire after traveling 150 km more”. Generates a diagnostic notification (after driving). Further, when the amount of change in state this time is larger than the amount of change in state of the other vehicle 200, the diagnosis unit 106 may generate a diagnosis notification (after traveling) in which a message prompting improvement of the driving method is displayed.
  • a diagnostic notification (after driving) will be generated with the message "It was a run that has a large effect on the tires. Be careful because there is a tendency for sudden starts and sudden braking.” To do. That is, the diagnosis unit 106 notifies the user of the vehicle 200 of the driving method for reducing the influence of the running of the vehicle 200 on the vehicle elements. Then, the diagnosis unit 106 transmits the generated diagnosis notification (after traveling) to the in-vehicle device 300.
  • the communication unit 301 receives the diagnosis notification (after traveling), and the diagnosis notification display unit 302 displays the message of the diagnosis notification (after traveling).
  • the server device 100 may send a diagnostic notification to a user terminal held by the user of the vehicle 200.
  • the user terminal is, for example, a smartphone, a tablet terminal, or the like.
  • the server device 100 may send a diagnostic notification to the server device of the dealer of the vehicle 200.
  • the dealer can grasp the state of the vehicle element based on the diagnosis notification, it is possible to appropriately notify the user of the inspection time.
  • the dealer can appropriately prepare the necessary replacement parts.
  • the diagnostic terminal used by the maintenance inspector of the dealer may be connected to the in-vehicle device 300, and the in-vehicle device 300 may transmit the diagnostic notification to the diagnostic terminal.
  • the diagnostic terminal and the in-vehicle device 300 can be connected to each other using, for example, an OBD (On-Board Diagnostics) interface. Further, the diagnostic terminal may transmit the abnormality of the vehicle element detected at the time of maintenance / inspection or the measurement result obtained at the time of maintenance / inspection to the server device 100.
  • the state of the vehicle element can be accurately diagnosed. Further, according to the present embodiment, it is possible to make a diagnosis even for a vehicle element whose state cannot be directly observed while the vehicle is running. Further, according to the present embodiment, it is possible to prevent a failure caused by the traveling by performing the diagnosis before the traveling of the vehicle. Further, since the diagnosis performed in the present embodiment is a diagnosis based on the amount of change in the state of the vehicle element, it is possible to determine the replacement time with higher accuracy than the judgment of the replacement time based on the mileage or the period of use. it can.
  • the diagnosis can be performed for each type of vehicle element, the diagnosis can be performed in consideration of the variation in the amount of change of state for each type of vehicle element. Further, in the present embodiment, since the diagnosis can be performed for each area, it is possible to perform the diagnosis in consideration of the variation in the amount of change of state due to the difference in the climate of the vehicle traveling area. Further, in the present embodiment, since the diagnosis can be performed for each vehicle type or model year, the diagnosis can be performed in consideration of the variation in the amount of change of state depending on the vehicle type or model year.
  • Embodiment 2 an example of diagnosing a vehicle element in the in-vehicle device 300 will be described. In the following, the differences from the first embodiment will be mainly described. The matters not explained below are the same as those in the first embodiment.
  • FIG. 20 shows an example of a functional configuration of the server device 100 according to the present embodiment.
  • the influence estimation unit 105 and the diagnosis unit 106 are omitted, and the diagnosis model transmission unit 107 is added.
  • the diagnostic model transmission unit 107 transmits the diagnostic model held in the diagnostic model storage unit 104 to the vehicle-mounted device 300 when requested by the vehicle-mounted device 300.
  • the function of the diagnostic model transmission unit 107 is also realized by a program in the same manner as the information acquisition unit 101 and the like.
  • the program that realizes the function of the diagnostic model transmission unit 107 is executed by the processor 911.
  • FIG. 21 shows an example of a functional configuration of the in-vehicle device 300 according to the present embodiment.
  • the element notification information acquisition unit 303 is omitted, and the diagnostic model storage unit 308, the effect estimation unit 309, and the diagnostic unit 310 are added, as compared with the configuration shown in FIG.
  • the functions of the impact estimation unit 309 and the diagnosis unit 310 are also realized by the program in the same manner as the communication unit 301 and the like.
  • the program that realizes the functions of the impact estimation unit 309 and the diagnosis unit 310 is executed by the processor 931.
  • the diagnostic model storage unit 308 is realized by the main storage device 932 or the auxiliary storage device 933.
  • the in-vehicle device 300 corresponds to the information processing device. Further, in the present embodiment, the operation performed by the in-vehicle device 300 corresponds to the information processing method and the information processing program.
  • the diagnostic model storage unit 308 stores the diagnostic model transmitted from the server device 100 and received by the communication unit 301.
  • the impact estimation unit 309 performs the same operation as the impact estimation unit 105 described in the first embodiment. That is, the impact estimation unit 309 derives the amount of change in the state of the vehicle element using the diagnostic model.
  • the diagnostic unit 310 performs the same operation as the diagnostic unit 106 described in the first embodiment. That is, the diagnosis unit 310 diagnoses the state of the vehicle element based on the amount of change in the state of the vehicle element derived by the effect estimation unit 309.
  • the server device 100 only the learning process (S11) is performed among the processes shown in FIG. The details of the learning process (S11) are as shown in FIGS. 13 and 14. Further, in the server device 100, after the learning process (S11), when the in-vehicle device 300 requests the transmission of the diagnostic model, the diagnostic model transmission unit 107 is held in the diagnostic model storage unit 104. Is transmitted to the in-vehicle device 300.
  • FIG. 22 shows an outline of the operation of the in-vehicle device 300 according to the present embodiment.
  • the operation of the in-vehicle device 300 is divided into a model acquisition process (step S31) and a diagnostic process (step S32).
  • the diagnosis unit 310 requests the server device 100 to transmit the diagnosis model. Then, the communication unit 301 receives the diagnostic model transmitted from the server device 100, and stores the received diagnostic model in the diagnostic model storage unit 308. In the diagnostic process (step S32), the impact estimation unit 309 derives the amount of change in the state of the vehicle element using the diagnostic model. Further, in the diagnosis process (step S12), the diagnosis unit 310 diagnoses the state of the vehicle element based on the amount of change of state, and the diagnosis notification display unit 302 displays the diagnosis notification.
  • FIG. 23 shows the details of the model acquisition process (step S31).
  • the model acquisition process (step S31) is performed before the vehicle 200 starts traveling.
  • the diagnostic unit 310 generates a model transmission request for requesting transmission of the diagnostic model, and the communication unit 301 transmits the model transmission request to the server device 100 (step S311).
  • the model transmission request includes the vehicle information shown in FIG. 24 and the vehicle element information shown in FIG. 25.
  • the vehicle ID, vehicle type, model year, and region are described in the vehicle information.
  • an element ID, an element type ID, a use start date, a final diagnosis date, and a diagnosis model version are described.
  • the final diagnosis date describes the date and time when the diagnosis unit 310 last diagnosed the vehicle element.
  • the diagnostic model version the version of the diagnostic model held in the diagnostic model storage unit 308 is described. When the diagnostic model is not held in the diagnostic model storage unit 308, a null value is described in the diagnostic model version column.
  • the element ID, element type ID, and use start date are set at the time of manufacturing the vehicle 200 or at the time of exchanging the vehicle element.
  • the information acquisition unit 101 receives the model transmission request and outputs the received model transmission request to the diagnostic model generation unit 103.
  • the diagnostic model generation unit 103 specifies a diagnostic model corresponding to the vehicle type, model year, city, and vehicle element specified by the vehicle information and the vehicle element information. Further, the diagnostic model generation unit 103 determines whether or not the version of the specified diagnostic model is newer than the version shown in the vehicle element information. When the version of the identified diagnostic model is newer than the version shown in the vehicle element information, the diagnostic model generation unit 103 instructs the diagnostic model transmission unit 107 to transmit the diagnostic model to the in-vehicle device 300.
  • the diagnostic model transmission unit 107 transmits the diagnostic model to the in-vehicle device 300 based on the instruction of the diagnostic model generation unit 103. Further, the diagnostic model generation unit 103 compares the use start date of the vehicle element information with the final diagnosis date. If there is a vehicle element whose use start date is later than the final diagnosis date, the diagnostic model generation unit 103 determines that the vehicle element has been replaced. When the replaced vehicle element exists, the diagnostic model generation unit 103 instructs the diagnostic model transmission unit 107 to initialize the cumulative change amount of the vehicle element. Based on the instruction from the diagnostic model generation unit 103, the diagnostic model transmission unit 107 transmits a message instructing the initialization of the cumulative change amount of the vehicle element to the vehicle-mounted device 300.
  • the communication unit 301 receives the diagnostic model. Then, in step S313, the communication unit 301 stores the received diagnostic model in the diagnostic model storage unit 308.
  • the diagnostic unit 310 initializes the cumulative change amount of the corresponding vehicle element.
  • the storage unit 307 holds the diagnosis result information of FIG. The diagnosis unit 310 initializes the value of the cumulative change amount of the diagnosis result information held by the storage unit 307.
  • FIG. 26 shows the details of the diagnostic process (step S32).
  • Step S321 is a process performed before the vehicle 200 travels.
  • step S322 is a process performed while the vehicle 200 is traveling.
  • Step S323 is a process performed after the vehicle 200 has traveled.
  • the diagnosis unit 310 performs element state diagnosis processing (before traveling) (step S321).
  • the diagnosis unit 310 performs element state diagnosis processing (before traveling) using the diagnosis result information (FIG. 9) at the time of the previous diagnosis held by the storage unit 307. Specifically, the diagnosis unit 310 determines whether or not the cumulative change amount of the diagnosis result information (FIG. 9) exceeds the threshold value for each vehicle element. That is, the diagnosis unit 310 determines whether or not the maintenance / inspection threshold value or the replacement threshold value of the diagnosis result information (FIG. 9) is “exceeded”. If the cumulative amount of change in any of the vehicle elements does not exceed the threshold value, the diagnostic unit 310 ends the process.
  • the diagnosis unit 310 when the cumulative change amount exceeds the threshold value in any of the vehicle elements, the diagnosis unit 310 outputs a diagnosis notification (before traveling) to the diagnosis notification display unit 302.
  • the diagnosis notification display unit 302 displays a message of the diagnosis notification (before traveling).
  • the diagnosis unit 310 initializes the cumulative change amount of the diagnosis result information (FIG. 9) according to the initialization instruction from the server device 100
  • the diagnosis unit 310 describes the vehicle element in step S321. You may compare the information usage start date with the final diagnosis date. In this case, as a result of comparison between the use start date and the final diagnosis date, if there is a vehicle element to be replaced, the diagnosis unit 310 initializes the value of the cumulative change amount of the corresponding vehicle element.
  • the behavior history information generation unit 304 generates the behavior history information and accumulates the generated behavior history information (step S322).
  • the behavior history information generation unit 304 generates behavior history information at regular intervals based on the control values of the vehicle control unit 306 and the sensor information collected by the sensor information collection unit 305. Further, the behavior history information generation unit 304 stores the generated behavior history information in a default storage area.
  • the impact estimation unit 309 and the diagnosis unit 310 perform element state diagnosis processing (after running) (step S323). That is, the influence estimation unit 309 derives the amount of state change for each vehicle element using the diagnostic model. Further, the diagnosis unit 310 makes a diagnosis for each vehicle element using the amount of state change derived by the influence estimation unit 309.
  • the impact estimation unit 105 of the first embodiment uses the behavior history information transmitted from the vehicle-mounted device 300, while the impact estimation unit 309 uses the behavior history information output from the behavior history information generation unit 304. Except for this point, the operation of the impact estimation unit 309 is the same as the operation of the impact estimation unit 105 described in the first embodiment. Further, the operation of the diagnostic unit 310 is the same as the operation of the diagnostic unit 106 described in the first embodiment. Therefore, the detailed description of step S323 will be omitted.
  • the diagnosis unit 310 outputs a diagnosis notification for notifying the diagnosis result to the diagnosis notification display unit 302.
  • the diagnosis notification display unit 302 displays the diagnosis notification.
  • the in-vehicle device 300 may send a diagnostic notification to the user terminal, the dealer's server device, and the dealer's maintenance worker's diagnostic terminal described in the first embodiment.
  • the advantages of transmitting the diagnostic notification to the user terminal, the dealer's server device, and the dealer's maintenance worker's diagnostic terminal are as shown in the first embodiment.
  • the vehicle element may be diagnosed while the vehicle 200 is running.
  • the influence estimation unit 309 derives the amount of state change at a cycle of, for example, 1 minute.
  • the diagnosis unit 310 adds each of the periodically obtained state change amounts to the cumulative change amount to perform diagnosis.
  • the diagnostic model generation unit 103 generates driving situation information, driving environment information, and vehicle-specific information from the behavior history information, and correlates these information with the amount of change in the state value of the vehicle element.
  • the diagnostic model generation unit 103 may generate a diagnostic model by another method.
  • the diagnostic model generation unit 103 may learn the correlation between the traveling information, the environmental information, and the vehicle-specific information and the amount of change in the state value of the vehicle element, and generate the diagnostic model.
  • the diagnostic model generation unit 103 may learn the correlation by using a method such as RNN (Recurrent Neural Network) that can handle time series data, for example.
  • RNN Recurrent Neural Network
  • the server device 100 and the in-vehicle device 300 may share the processing below.
  • the in-vehicle device 300 performs the effect estimation, and the server device 100 performs the diagnosis.
  • the configuration of the server device 100 is the configuration of FIG. 4 in which the impact estimation unit 105 is omitted.
  • the configuration of the in-vehicle device 300 is such that the diagnostic unit 310 is omitted from the configuration of FIG.
  • the flow of diagnosis is almost the same as that of the second embodiment.
  • the communication unit 301 notifies the server device 100 of the amount of state change of the vehicle element extracted by the influence estimation unit 309.
  • the diagnosis unit 106 performs a diagnosis using the notified state change amount and the previous state change amount.
  • the server device 100 basically makes a diagnosis, but the in-vehicle device 300 makes a simple diagnosis.
  • the configuration of the server device 100 in this case is as shown in FIG. 4, and the configuration of the in-vehicle device 300 is as shown in FIG.
  • the flow of diagnosis is almost the same as that of the first embodiment and the second embodiment.
  • the information to be input to the diagnostic model is less than that in the second embodiment.
  • the in-vehicle device 300 uses the above-mentioned "message to encourage improvement of driving method"("It was a driving that has a large effect on the tires. Be careful because there is a tendency for sudden starts and sudden braking", etc.). Only the diagnosis necessary for output is performed by the in-vehicle device 300.
  • Embodiment 3 a method of generating a diagnostic model different from those of the first and second embodiments and a method of diagnosing vehicle elements will be described. In the present embodiment, the differences from the first and second embodiments will be mainly described. The matters not explained below are the same as those in the first or second embodiment.
  • the configuration of the server device 100 and the in-vehicle device 300 may be any of the configurations of the first and second embodiments. In the following, the description will proceed on the premise of the configuration of the first embodiment.
  • the diagnostic model generation unit 103 calculates statistics such as the mean value, standard deviation, median value, and standard deviation of each item of the behavior history information. In the example of FIG. 8, the diagnostic model generation unit 103 calculates the average value and the standard deviation for each item such as vehicle speed and acceleration. Next, the diagnostic model generation unit 103 generates a diagnostic model by performing a correlation analysis between the calculated statistics such as the mean value and the standard deviation and the amount of change in the state value in the element state information. The method of generating the diagnostic model is the same as that of the first embodiment.
  • the in-vehicle device 300 transmits the behavior history information to the server device 100 after the running of the vehicle 200 is completed.
  • the influence estimation unit 105 divides the time-series data of the behavior history information at regular intervals (for example, 10 seconds), and calculates the mean value and standard deviation of each item at regular cycles (step S131). In the example of FIG. 8, the influence estimation unit 105 calculates the mean value and the standard deviation for each item such as vehicle speed and acceleration at regular intervals.
  • the impact estimation unit 105 inputs the average value and standard deviation of each item at regular intervals into the diagnostic model, and derives the amount of state change at regular cycles.
  • step S133 the diagnosis unit 106 adds the state change amount at regular intervals to the cumulative change amount to diagnose the state of the vehicle element (step S133). Since step S133 is the same as step S1244 of FIG. 19, the description thereof will be omitted.
  • the impact estimation unit 105 and the diagnosis unit 106 are supposed to perform the diagnosis.
  • the impact estimation unit 309 and the diagnosis unit 310 perform the diagnosis by the above procedure.
  • a diagnostic model can be generated with a smaller calculation load as compared with the first and second embodiments, and a diagnosis can be performed.
  • the influence estimation unit 105 calculates the statistic based on the value of each item during a fixed period (for example, 10 seconds). Instead, the impact estimation unit 105 may calculate the statistic with the value of each item at regular intervals (for example, 10 seconds). That is, the effect estimation unit 105 may calculate the statistic using the value at 0 seconds, the value at 10 seconds, the value at 20 seconds, and the like. Normally, the behavior of the vehicle does not change frequently in a short period of time. Therefore, even if the data is thinned out to calculate the statistics and the learning and diagnosis are performed, the accuracy does not decrease. By thinning out such data and calculating the statistic, there is an effect that the required arithmetic resources and storage resources can be reduced.
  • the impact estimation unit 105 uses only the values of the time zone in which characteristic driving conditions (sudden curves, sudden braking, etc.) with a high degree of influence on changes (deterioration, etc.) of vehicle elements are performed to obtain statistics. It may be calculated. In this case as well, there is an effect that the required arithmetic resources and storage resources can be reduced.
  • the tire wear rate can be calculated from the lateral force, braking force, and driving force.
  • the tire wear rate can be calculated by, for example, the following formula.
  • the acceleration of the vehicle 200 can be obtained from the behavior history information. Further, values such as the toe angle of the wheel and the weight of the tire may be included in the specification information (FIG. 6) of the vehicle 200. On the other hand, it is difficult to obtain values such as stiffness from behavior history information. Therefore, the following is used as a calculation formula for the tire wear rate with the parameters that can be collected by the vehicle 200 as variables.
  • A”, “B” and “C” are coefficient values for calculating the tire wear speed due to the lateral force, braking force and driving force.
  • the diagnostic model generation unit 103 learns the coefficient values of these “A”, “B”, and “C” by using the behavior history information and the amount of change in the state value of the vehicle element.
  • Embodiment 4 the behavior history information is used as it is. In the present embodiment, an example of reducing the amount of information by symbolizing the behavior history information will be described. In the present embodiment, the differences from the first to third embodiments will be mainly described. Items not described below are the same as those in the first to third embodiments.
  • the configuration of the server device 100 and the in-vehicle device 300 may be any of the configurations of the first and second embodiments. In the following, the description will proceed on the premise of the configuration of the first embodiment.
  • the influence estimation unit 105 classifies the values of the behavior history information received from the in-vehicle device 300 into categories and symbolizes them. For example, the impact estimation unit 105 classifies vehicle speed values into a plurality of categories according to the speed range. If the speed range is classified into three stages, for example, the influence estimation unit 105 classifies the speed range of less than 30 km / h as "C”. Further, the influence estimation unit 105 classifies the speed range of 30 km / h to 50 km / h as "B”. Further, the influence estimation unit 105 classifies the speed range of 50 km / h to 80 km / h as "A".
  • the influence estimation unit 105 calculates the change direction and the change amount of the value of the behavior history information.
  • the influence estimation unit 105 classifies the direction of change in vehicle speed into increase (Up, U), decrease (Down, D), and no change (Keep, K). Further, the influence estimation unit 105 classifies the amount of change in vehicle speed into a large amount of change (Large, L), a small amount of change (Small, S), and no change (Normal, N). Then, the influence estimation unit 105 generates driving information in which the classification result is reflected.
  • the impact estimation unit 105 generates analysis result information using the traveling information.
  • the influence estimation unit 105 generates analysis result information in which the value of the traveling information is a condition attribute and the item shown in the behavior history information is a determination attribute.
  • the influence estimation unit 105 determines the vehicle speed, the change direction of the vehicle speed, and the vehicle speed.
  • the analysis result information is generated with the amount of change in the condition attribute and the degree of braking as the determination attribute.
  • the impact estimation unit 105 generates driving status information using the determination attribute of the analysis result information. Since the processing after the generation of the traveling status information is as shown in the first or second embodiment, the description thereof will be omitted.
  • FIG. 28 shows the time course of the vehicle speed described in the behavior history information.
  • the slowest speed range is classified as “E” and the fastest speed range is classified as "A”.
  • FIG. 29 shows the categorization results in which the time course of the vehicle speed shown in FIG. 28 is represented by the symbols “A” to “E”.
  • FIG. 30 shows traveling information in which the category classification result shown in FIG. 29 and the category classification result of the vehicle speed change direction and the vehicle speed change amount are combined.
  • the direction of change in vehicle speed is represented by any of “U", “D” and “K”.
  • the amount of change in vehicle speed is represented by any of "L", “S” and “N”.
  • FIG. 31 shows analysis result information. In the example of FIG.
  • the vehicle speed, change direction, and change amount of the traveling information of FIG. 30 are represented as condition attributes, and the item “brake degree” shown in the behavior history information is represented as a determination attribute. Further, in the example of FIG. 31, each line is shown in the order of vehicle speeds “A” to “E”.
  • the influence estimation unit 105 determines that sudden braking has occurred, for example, when the braking degrees are “2: below average” and “1: poverty”. The influence estimation unit 105 counts the number of occurrences of the braking degree “2: below average” and “1: poverty” in the analysis result information of FIG. ..
  • the amount of information can be reduced by symbolizing the behavior history information. Therefore, the diagnosis can be performed with a small calculation load and storage capacity.
  • the processor 911 and the processor 931 are ICs (Integrated Circuits) that perform processing, respectively.
  • the processor 911 and the processor 931 are a CPU (Central Processing Unit), a DSP (Digital Signal Processor), and the like, respectively.
  • the main storage device 912 and the main storage device 932 are RAMs (Random Access Memory), respectively.
  • the auxiliary storage device 913 and the auxiliary storage device 933 are a ROM (Read Only Memory), a flash memory, an HDD (Hard Disk Drive), and the like, respectively.
  • the communication device 914 and the communication device 934 are electronic circuits that execute data communication processing, respectively.
  • the communication device 914 and the communication device 934 are, for example, a communication chip or a NIC (Network Interface Card), respectively.
  • the OS (Operating System) is also stored in the auxiliary storage device 913 and the auxiliary storage device 933, respectively.
  • the processor 911 and the processor 931 each execute at least a part of the OS.
  • the processor 911 executes a program that realizes the functions of the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, the diagnostic unit 106, and the diagnostic model transmission unit 107 while executing at least a part of the OS.
  • the processor 911 executes the OS, task management, memory management, file management, communication control, and the like are performed.
  • the processor 931 executes the communication unit 301, the diagnosis notification display unit 302, the behavior history information generation unit 304, the sensor information collection unit 305, the vehicle control unit 306, the influence estimation unit 309, and the diagnosis unit. Execute a program that realizes the functions of 310.
  • the processor 931 executes the OS, task management, memory management, file management, communication control, and the like are performed.
  • At least one of the information, data, signal value, and variable value indicating the processing results of the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, the diagnostic unit 106, and the diagnostic model transmission unit 107 is mainly stored. It is stored in at least one of a register and a cache memory in the device 912, the auxiliary storage device 913, and the processor 911.
  • the programs that realize the functions of the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, the diagnostic unit 106, and the diagnostic model transmission unit 107 are magnetic disks, flexible disks, optical disks, compact disks, and Blu-ray (registered trademarks). ) It may be stored in a portable recording medium such as a disc or a DVD. Then, a portable recording medium containing a program that realizes the functions of the information acquisition unit 101, the diagnostic model generation unit 103, the influence estimation unit 105, the diagnostic unit 106, and the diagnostic model transmission unit 107 may be commercially distributed. ..
  • at least one of the variable values is stored in at least one of the registers and cache memory in the main storage device 932, the auxiliary storage device 933, and the processor 931.
  • the program that realizes the functions of the communication unit 301, the diagnosis notification display unit 302, the behavior history information generation unit 304, the sensor information collection unit 305, the vehicle control unit 306, the effect estimation unit 309, and the diagnosis unit 310 is a magnetic disk or a flexible program.
  • a portable recording medium such as a disc, an optical disc, a compact disc, a Blu-ray (registered trademark) disc, or a DVD. Then, a portable program that realizes the functions of the communication unit 301, the diagnosis notification display unit 302, the behavior history information generation unit 304, the sensor information collection unit 305, the vehicle control unit 306, the impact estimation unit 309, and the diagnosis unit 310 is stored.
  • the recording medium may be distributed commercially.
  • the "section" of the information acquisition section 101, the diagnostic model generation section 103, the impact estimation section 105, the diagnostic section 106, and the diagnostic model transmission section 107 is read as “circuit” or “process” or “procedure” or “processing”. You may.
  • the server device 100 may be realized by a processing circuit.
  • the processing circuit is, for example, a logic IC (Integrated Circuit), a GA (Gate Array), an ASIC (Application Specific Integrated Circuit), or an FPGA (Field-Programmable Gate Array).
  • the "units" of the communication unit 301, the diagnosis notification display unit 302, the behavior history information generation unit 304, the sensor information collection unit 305, the vehicle control unit 306, the impact estimation unit 309, and the diagnosis unit 310 are referred to as “circuits” or “processes”. , Or “procedure” or “process”. Further, the in-vehicle device 300 may also be realized by a processing circuit.
  • processing circuit Lee the superordinate concept of the processor and the processing circuit is referred to as "processing circuit Lee". That is, the processor and the processing circuit are specific examples of the “processing circuit Lee", respectively.
  • 100 server device 101 information acquisition unit, 102 information storage unit, 103 diagnostic model generation unit, 104 diagnostic model storage unit, 105 impact estimation unit, 106 diagnostic unit, 107 diagnostic model transmission unit, 200 vehicle, 300 in-vehicle device, 301 communication Unit, 302 diagnosis notification display unit, 303 element notification information acquisition unit, 304 behavior history information generation unit, 305 sensor information collection unit, 306 vehicle control unit, 307 storage unit, 308 diagnostic model storage unit, 309 impact estimation unit, 310 diagnosis Department, 500 diagnostic system, 911 processor, 912 main memory, 913 auxiliary storage, 914 communication device, 931 processor, 932 main storage, 933 auxiliary storage, 934 communication device.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Control Of Driving Devices And Active Controlling Of Vehicle (AREA)
  • Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
  • Traffic Control Systems (AREA)

Abstract

La présente invention concerne une unité d'acquisition d'informations (101) qui acquiert des informations d'historique de comportement montrant l'historique de comportement d'un véhicule pendant le déplacement. Une unité d'estimation d'effet (105) estime, sur la base de l'historique de comportement du véhicule pendant le déplacement représenté dans les informations d'historique de comportement, l'effet du déplacement du véhicule sur un élément de véhicule, qui est un élément du véhicule. Une unité de diagnostic (106) diagnostique l'état de l'élément de véhicule sur la base de l'effet du déplacement du véhicule sur l'élément de véhicule tel qu'estimé par l'unité d'estimation d'effet (105).
PCT/JP2019/016111 2019-04-15 2019-04-15 Dispositif de traitement d'informations, procédé de traitement d'informations et programme de traitement d'informations WO2020213024A1 (fr)

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JP7533417B2 (ja) 2021-10-07 2024-08-14 トヨタ自動車株式会社 情報処理装置、方法、及びプログラム

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WO2024154518A1 (fr) * 2023-01-16 2024-07-25 株式会社デンソー Dispositif de commande de véhicule et procédé de commande de véhicule

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