JP2019079115A - Data storage device - Google Patents

Abstract

To provide a data storage device capable of storing data useful for analyzing a cause of an abnormal event occurrence while suppressing a data amount to be stored.SOLUTION: A data storage device 1 is configured by comprising: an abnormal event identification unit 111 that identifies an abnormal event which has occurred during control on the basis of state data deviated from a first reference value set for each state data among a plurality of state data acquired when hardware is controlled; a data extraction unit 112 that extracts unique data associated with the occurred abnormal event in advance from among the plurality of state data and extracts non-unique data deviated from a second reference value set for each state data in the first reference value from among the plurality of state data excluding the unique data; and a storage unit 12 that stores the unique data and the non-unique data corresponding to the occurred abnormal event.SELECTED DRAWING: Figure 1

Description

  The present invention relates to data storage devices.

  An electronic control unit (ECU) mounted on the vehicle may be configured to detect a fault that occurs when controlling the hardware, and store an event code indicating the fault that has occurred and state data at the time of the fault occurrence. . However, when the number of state data to be stored is large, a large-capacity storage device is required, and inconveniences such as a long time for analyzing the cause of the occurrence of a failure occur. Therefore, as a technology for solving such inconvenience, for example, the following technology described in Patent Document 1 is known.

  Specifically, the data storage device described in Patent Document 1 includes an analysis target data temporary storage unit, an event occurrence determination unit, an event data output unit, and a data storage unit. The analysis target data temporary storage unit stores analysis target data for a predetermined time immediately before or for the number of times of acquisition. The event occurrence determination unit determines the occurrence of an event from the event occurrence data. The event data output unit outputs data regarding an event and an event occurrence determination as event data. The data storage unit stores the data stored in the analysis target data temporary storage unit after a predetermined time from when the occurrence of the event is determined or determined, in association with the event data.

  In addition, the technique as described in patent documents 2-6 is also known as another related technique.

JP, 2009-3685, A JP 2001-317403 A Unexamined-Japanese-Patent No. 2004-36506 Unexamined-Japanese-Patent No. 2012-13486 JP, 2014-85709, A JP, 2016-212807, A

  However, in the technique as described in Patent Document 1 described above, data that has not been previously associated with an event is not stored. For this reason, data not associated with an event can not be confirmed when analyzing the cause of the event occurrence.

  An object according to one aspect of the present invention is to provide a data storage device that stores data useful for analyzing the cause of an abnormal event while suppressing the amount of stored data.

  A data storage device according to one aspect of the present invention includes an abnormal event identification unit, a data extraction unit, and a storage unit. The abnormal event identification unit occurs during control based on status data deviated from the first reference value set for each status data among the plurality of status data acquired when controlling the hardware. Identify abnormal events. The data extraction unit extracts unique data associated in advance with an abnormal event that has occurred from among a plurality of state data, and, within a plurality of state data other than unique data, within a first reference value and for each state data Extract non-unique data that deviates from the second reference value set in. The storage unit stores unique data and non-unique data in association with an abnormal event that has occurred.

  According to the storage data storage device according to one embodiment, it is possible to store data useful for analyzing the cause of an abnormal event occurrence while suppressing the amount of data to be stored.

FIG. 1 is a diagram showing an example of the configuration of a data storage device according to an embodiment. It is a figure showing an example of composition of a system which carries a data storage device according to an embodiment. It is an example of the data storage table which the data storage device according to the embodiment stores.

Hereinafter, embodiments will be described in detail based on the drawings.
FIG. 1 is a view showing an example of the configuration of a data storage device according to the embodiment. The data storage device 1 shown in FIG. 1 may be an ECU that monitors and controls the operation of hardware installed in a vehicle. In the configuration example shown in FIG. 1, the data storage device 1 includes a control unit 11 and a storage unit 12.

  The control unit 11 is configured of, for example, a central processing unit (CPU), a multi-core CPU, a logic device, or a programmable logic device (such as a field programmable gate array (FPGA) or a programmable logic device (PLD)). The control unit 11 monitors and controls the operation of hardware such as a charger and a secondary battery, for example. In the configuration example shown in FIG. 1, the control unit 11 includes an abnormal event identification unit 111 and a data extraction unit 112.

  The abnormal event identifying unit 111 identifies an abnormal event that has occurred during control based on status data that deviates from the first reference value among the plurality of status data obtained when controlling the hardware. The hardware to be controlled is, for example, a charger or a secondary battery mounted on a vehicle. The acquired state data is, for example, a control signal transmitted / received to / from another device by the control unit 11, a voltage, a current, a temperature, or the like measured for hardware. In addition, the first reference value is a data value indicating an abnormality of the hardware with respect to the corresponding state data. That is, the first reference value is a threshold value set in advance for each state data, and is set to determine the presence or absence of an abnormality in the hardware. Note that “out of the first reference value” means that the value falls below the first reference value when the first reference value is the lower limit reference value. Further, "out of the first reference value" indicates that the first reference value is higher than the first reference value when it is the upper limit reference value.

  The data extraction unit 112 extracts unique data and non-unique data from among a plurality of state data. The unique data is data pre-associated with an abnormal event that has occurred among the plurality of state data. The non-unique data is data out of the second reference value other than the unique data among the plurality of state data. The second reference value is a reference value within the first reference value for the corresponding relevant state data, and is a reference value indicating a singular value with respect to the corresponding relevant state data. That is, the second reference value is a threshold value set in advance for each state data, and is set to determine whether the state data is stored in the storage unit 12 as non-unique data. If the second reference value is "within the first reference value", the second reference value is equal to or greater than the first reference value when the first reference value is the lower limit reference value. Point to In addition, the second reference value "is within the first reference value" means that the second reference value is less than or equal to the first reference value when the first reference value is the upper limit reference value. Point to something. Note that “out of the second reference value” means that the value falls below the second reference value when the second reference value is the lower limit reference value. Further, “out of the second reference value” means that the value exceeds the second reference value when the second reference value is the upper limit reference value. The second reference value may be set for each abnormal event that occurs during control.

  Thus, the first reference value and the second reference value are set for each state data. That is, for example, when a plurality of sensors each measure state data, the first reference value is set for each sensor, and the second reference value is set within the corresponding first reference value.

  The storage unit 12 is configured by, for example, a random access memory (RAM), a non volatile random access memory (NVRAM), or the like. The storage unit 12 stores the unique data and the non-unique data in association with the abnormal event that has occurred.

  The data storage device according to the embodiment may be implemented as a control unit of various hardware, but will be further described with reference to FIG. 2 as an example of a case implemented as an ECU of a charger mounted on a vehicle. FIG. 2 is a diagram showing an example of the configuration of a system equipped with a data storage device according to the embodiment.

  In the configuration example shown in FIG. 2, the system S is a system in which the charger CH mounted on the vehicle VE charges the secondary battery B using the power supplied from the charging station EVSE. The vehicle VE is, for example, an electric car or an electric forklift. The data storage device 1 is provided as a control unit (ECU) of the charger CH. Charger CH includes, in addition to data storage device 1, power conversion circuit PC, first voltage sensor VS1, second voltage sensor VS2, first current sensor CS1, second current sensor CS2, and temperature sensor TS. Equipped with

  The charger CH is connected to a battery pack BP including a secondary battery B and a battery control unit B-ECU, and a vehicle control unit VE-ECU that controls the traveling of the vehicle VE. For example, the control unit 11 acquires the travel distance of the vehicle VE from the vehicle control unit VE-ECU. Further, at the time of charging of the secondary battery B, the control unit 11 controls the secondary battery B such as the charge control state of the secondary battery B, such as SOC (State Of Charge) and voltage value of the secondary battery B. Acquired from Part B-ECU. The secondary battery B is, for example, a lead storage battery, a lithium ion battery, a nickel hydrogen battery, or an electric double layer capacitor.

  In addition, when charging the secondary battery B, the charger CH is connected to the charging station EVSE by the connection between the first charging connector CN1 on the charger CH side and the second connector CN2 on the charging station EVSE side. The charging station EVSE supplies predetermined AC power to the secondary battery B via the charger CH in accordance with an instruction from the control unit 11. In the example shown in FIG. 2, the charging station EVSE supplies an alternating voltage of 200 [V] by closing the first switch SW1 and the second switch SW2, and the first switch SW1 or the second switch SW2 is supplied. Supply 100 [V] AC voltage by closing.

  For example, when the charger CH is electrically connected to the charging station EVSE, the control unit 11 detects the electrical connection between the charger CH and the charging station EVSE by the voltage change of the Proximity Detection signal input from the charging station EVSE. . Further, the control unit 11 specifies the rated current supplied by the charging station EVSE based on the duty ratio of the Control Pilot signal input from the charging station EVSE. Then, the control unit 11 notifies the charging station EVSE of the completion of the preparation for charging the secondary battery B or the charging completion by the voltage change of the Control Pilot signal output to the charging station EVSE.

  Power conversion circuit PC converts AC power input from charging station EVSE into predetermined DC power according to an instruction from control unit 11 and outputs the DC power to secondary battery B. For example, the control unit 11 controls the current output from the power conversion circuit PC to the secondary battery B based on the battery control state acquired from the battery control unit B-ECU.

  The first voltage sensor VS1 and the second voltage sensor VS2 are configured by, for example, an IC (Integrated Circuit). The first voltage sensor VS1 measures the input voltage of the power conversion circuit PC, and the second voltage sensor VS2 measures the output voltage of the power conversion circuit PC. The first voltage sensor VS1 and the second voltage sensor VS2 output the measured voltage values to the control unit 11.

  The first current sensor CS1 and the second current sensor CS2 are configured by, for example, a Hall element or a shunt resistor. The first current sensor CS1 measures the input current of the power conversion circuit PC, and the second current sensor CS2 measures the output current of the power conversion circuit PC. The first current sensor CS1 and the second current sensor CS2 output the measured current values to the control unit 11.

  The temperature sensor TS is configured of, for example, a thermistor. The temperature sensor TS measures the temperature of the power conversion circuit PC. The temperature sensor TS outputs the measured temperature to the control unit 11.

  The travel distance and the charge control state as described above are an example of a plurality of state data acquired by the control unit 11. Further, the voltage value of the Proximity Detection signal, the voltage value of the Control Pilot signal, and the duty ratio of the Control Pilot signal as described above are examples of a plurality of state data acquired by the control unit 11. Furthermore, each measurement value of the first voltage sensor VS1, the second voltage sensor VS2, the first current sensor CS1, the second current sensor CS2, and the temperature sensor TS is a plurality of state data according to the embodiment. It is an example.

  When an abnormal event occurs when controlling the charger CH, the control unit 11 extracts unique data and non-unique data from a plurality of state data as described above. Then, as an example shown in FIG. 3, the control unit 11 stores the extracted unique data and non-unique data in the storage unit 12 in association with the abnormal event that has occurred. FIG. 3 is an example of a data storage table stored by the data storage device according to the embodiment.

  Specifically, the abnormal event specifying unit 111 detects an error that has occurred during control based on status data that deviates from the first reference value among the plurality of status data acquired when controlling the charger CH. Identify the event. For example, after the electrical connection between the charger CH and the charging station EVSE, if the voltage value of the Proximity Detection signal falls below the first reference value which is the lower limit threshold at which connection detection is possible, the abnormal event identifying unit 111 charges the battery. Identify the connection abnormality of the connectors CN1 and CN2. Also, for example, when the measurement value of the second voltage sensor VS2 exceeds the first reference value indicating that the output voltage of the power conversion circuit PC is an overvoltage after the start of charge control, the abnormal event identification unit 111 The output abnormality of the power conversion circuit PC is identified.

  The data extraction unit 112 extracts unique data pre-associated with the generated abnormal event from among the plurality of state data. For example, when the generated abnormal event is the connection abnormality of the charger CH, the data extraction unit 112 extracts the voltage value of the proximity detection signal as the unique data as shown in FIG. Also, for example, when the generated abnormal event is an output abnormality of the power conversion circuit PC, the data extraction unit 112 adds the second current sensor CS2 to the measurement value of the second voltage sensor VS2 as shown in FIG. Extract the measured value of as unique data. Furthermore, for example, the data extraction unit 112 can extract the occurrence date and time of the abnormal event, the traveling distance, and the charge control state as shown in FIG. 3 as common unique data regardless of the type of the abnormal event.

  Further, the data extraction unit 112 extracts non-unique data deviated from the second reference value other than the unique data from among the plurality of state data. For example, in the case where the generated abnormal event is a connection abnormality of the charge connectors CN1 and CN2, if the duty ratio of the Control Pilot signal deviates from the second reference value indicating the specified value of the duty ratio, the data extraction unit 112 As shown in FIG. 3, the duty ratio is extracted as non-unique data. Further, for example, when the generated abnormal event is an output abnormality of the power conversion circuit PC, a second reference value indicating that the input voltage of the power conversion circuit PC is higher than the normal value is used as the first voltage sensor VS1. If the measured value exceeds, the data extracting unit 112 extracts the measured value as non-unique data as shown in FIG.

  Thus, when an abnormal event occurs, the data storage device 1 stores non-unique data indicating a unique value at the time of occurrence of the abnormal event, in addition to the specific data previously associated with the abnormal event. . For this reason, according to the data storage device 1, even if it is not necessary to store all of a plurality of state data acquired at the time of controlling the hardware, a singularity at the time of occurrence of the abnormal event occurs when analyzing the cause of the abnormal event occurred. The state data indicating the value can be confirmed. Therefore, according to the storage data storage device according to the embodiment, it is possible to store data useful for analyzing the cause of an abnormal event occurrence while suppressing the amount of data to be stored.

  In the example described above with reference to FIG. 2, the first reference value and the second reference value for each state data are either 100 [V] or 200 [V] for the output voltage of the charging station EVSE. Different values may be set depending on the device.

  The second reference value may be set for each abnormal event that occurs during control. For example, a second reference value set for each of the measurement values of the first voltage sensor VS1, the second voltage sensor VS2, the first current sensor CS1, and the second current sensor CS2 corresponds to the power conversion circuit. Different values may be set depending on input abnormality, output abnormality, and temperature abnormality of the PC. As described above, by setting the second reference value for each abnormal event occurring during control, it is possible to store only state data that is useful for analyzing the abnormal event that has occurred among a plurality of state data. .

  The present invention is not limited to the above embodiments, and various improvements and modifications can be made without departing from the scope of the present invention.

  For example, among the plurality of state data, the state data to be extracted by the data extraction unit 112 as non-unique data may be different for each abnormal event. For example, when the generated abnormal event is the connection abnormality of the charge connectors CN1 and CN2, the data extraction unit 112 does not uniquely measure the measurement values of the second voltage sensor VS2, the second current sensor CS2, and the temperature sensor TS. It does not have to be the target of data extraction. According to such an embodiment, it is possible to speed up the process of extracting non-unique data useful for analysis of an abnormal event that has occurred from among a plurality of state data.

1 data storage device 11 control unit 12 storage unit 111 abnormal event identification unit 112 data extraction unit B secondary battery B-ECU battery control unit BP battery pack CH charger CN1 first charge connector CN2 second charge connector CS1 first Current sensor CS2 Second current sensor EVSE Charging station PC Power conversion circuit S System SW1 First switch SW2 Second switch TS Temperature sensor VE Vehicle VE-ECU Vehicle control unit VS1 First voltage sensor VS2 Second voltage Sensor

Claims (3)

Among the plurality of state data acquired when controlling the hardware, an abnormal event occurring during the control is identified based on the state data deviated from the first reference value set for each state data. An abnormal event identification unit,
From the plurality of state data, unique data previously associated with the abnormal event that has occurred is extracted, and from among the plurality of state data other than the unique data, the state is within the first reference value and the state A data extraction unit for extracting non-unique data deviated from a second reference value set for each data;
A storage unit storing the unique data and the non-unique data in association with the abnormal event that has occurred. A data storage device according to claim 1, wherein
A data storage device characterized in that the second reference value is set for each abnormal event occurring during the control. A data storage device according to claim 1 or 2, wherein
A data storage device characterized in that among the plurality of state data, state data to be extracted by the data extraction unit for the non-unique data differs for each abnormal event.

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