JP2014133435A - Vehicle failure recording device and vehicle failure recording method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle failure recording device and a vehicle failure recording method, which enable prevention of overwriting/erasing of a given record of failure occurring to a vehicle.SOLUTION: A vehicle failure recording device 12 includes: a condition record memory 6 for recording a signal related to an operation status of an electric vehicle collected at a given cycle; a failure record memory 7 having a storage area for storing a failure record obtained every time a failure occurs; a control table 8 for storing inhibition information specifying a storage area inhibiting overwriting, of the storage area, and a period of inhibiting the overwriting; and failure recording means 5 for selecting a storage area not inhibiting overwriting on the basis of the inhibition information, recording the signal during a period including the time at which a failure occurs as the failure record in the failure record memory, and recording, in the control table, the inhibition information for inhibiting overwriting of the selected storage area for a given period, if the failure is a given failure.

Description

  Embodiments of the present invention relate to a technique for recording a vehicle failure situation in an electric vehicle such as a railway train.

  When an event such as a failure occurs during operation of a vehicle such as a railroad train, it is indispensable to ascertain the safe traveling of the vehicle by grasping the situation and analyzing the cause when the event occurs. For this reason, the vehicle is equipped with a failure recording device that collects the status of the failure that has occurred.

  In the conventional failure recording device, for example, signals indicating the operation state of each device that controls the running of the vehicle are collected at predetermined intervals, and when a failure occurs, the failure occurrence signal is used as a trigger to break the data before and after the failure. It is stored in a storage device as recorded information.

  By utilizing the information recorded in this way, it is possible to analyze the failure of the equipment / equipment mounted on the train and to investigate the cause of the failure.

JP 2008-131797 A

  By the way, since the amount of information collected and stored in the storage device is enormous, the conventional failure recording device cyclically uses the recording area for storing the failure record and records a new failure record on the old failure record. It is configured to leave the latest failure record by overwriting.

  For this reason, the conventional failure recording apparatus sometimes erases a desired failure record. For example, even if you want to see the failure record that occurs in the initial stage after the start of vehicle startup, you cannot stop the operation of the vehicle and collect the failure record when the vehicle is in commercial operation. The failure record will be read later. Therefore, when a plurality of other failures occur before the end of the operation, the failure record immediately after the start of startup may be overwritten and erased by the failure record that subsequently occurred.

  The present invention has been made to solve the above problems, and provides a vehicle failure recording apparatus and a vehicle failure recording method capable of preventing a predetermined failure record generated in a vehicle from being overwritten and erased. The purpose is to do.

  According to an embodiment of the present invention for solving the above problems, a situation record memory that records signals relating to the driving situation of an electric vehicle collected at a predetermined period, and a failure record that is acquired each time a failure occurs are stored. A failure recording memory having a storage area for storing, a control table for storing prohibition information that defines a storage area that prohibits overwriting and a period during which overwriting is prohibited, and overwriting is prohibited based on the prohibition information. The storage area is selected, and the signal of the period including the time of occurrence of the failure is recorded as the failure record in the failure recording memory. When the failure is a predetermined failure, the selected storage area is overwritten for a predetermined period. There is provided a vehicle failure recording apparatus comprising failure recording means for recording the prohibition information for prohibition in the control table.

The figure which shows the structure of the driving | running | working condition collection system provided with the vehicle failure recording device of 1st Embodiment. The figure which shows the structure of the failure recording memory provided in the vehicle failure recording device of 1st Embodiment. The figure which shows the content of the control table provided in the vehicle failure recording device of 1st Embodiment. The flowchart which shows the process sequence of the overwriting prohibition cancellation means provided in the vehicle failure recording device of 1st Embodiment. The flowchart which shows the process sequence of the failure recording means provided in the vehicle failure recording device of 1st Embodiment. The figure which shows the content of the failure recording memory provided in the vehicle failure recording device of 2nd Embodiment. The figure which shows the content of the control table provided in the vehicle failure recording device of 2nd Embodiment. The flowchart which shows the process sequence of the overwriting prohibition cancellation means provided in the vehicle failure recording device of 1st Embodiment. The flowchart which shows the process sequence of the failure recording means provided in the vehicle failure recording device of 2nd Embodiment. The figure for demonstrating the method to control overwriting prohibition in the vehicle failure recording device of 2nd Embodiment. The figure which shows the content of the control table provided in the vehicle failure recording device of 3rd Embodiment.

[First embodiment]
FIG. 1 is a diagram illustrating a configuration of a driving situation collection system including a vehicle failure recording device 12 according to the first embodiment.

The driving situation collection system includes an input unit 1, a state monitoring unit 2, a control unit 3, a control signal output unit 4, a vehicle failure recording device 12, and an external device 11.
The vehicle failure recording device 12 is provided with a failure recording means 5, a situation recording memory 6, a failure recording memory 7, a control table 8, an overwriting prohibition releasing means 9, and a failure record reading means 10.

  The input means 1 reads a signal (analog input, digital status input, etc.) relating to the train operation status. For example, there are three types of sampling periods in which the input means 1 reads a signal: a short period, a medium period, and a long period. The inverter gate control signal and the like are read in a short cycle (1 to 2 ms). The current signal of the vehicle drive motor and the like are read at a medium cycle (10 to 20 ms). Vehicle speed, overhead line voltage, and the like are read in a long cycle (1-2 s).

  The state monitoring unit 2 performs an upper / lower limit check on the read signal to determine whether there is an abnormality, and outputs the result to the control unit 3. The control means 3 outputs a required control signal to the corresponding device via the control signal output means 4.

  In addition, the state monitoring unit 2 stores the read signal in the situation recording memory 6. The status recording memory 6 is a buffer memory that records each time a signal is read. Further, the state monitoring unit 2 notifies the failure recording unit 5 of the occurrence of a failure when an abnormality is detected from the read signal or when an abnormality detection signal is received from the outside (not shown).

  When the failure recording means 5 receives from the state monitoring means 2 that a failure has occurred, the failure recording means 5 extracts data stored in the situation recording memory 6 corresponding to the type of the failure. The failure recording means 5 extracts data for a predetermined period before and after the occurrence of the failure, for example. The failure recording means 5 stores the extracted data in the failure recording memory 7 while referring to the control table 8. The overwriting prohibition canceling means 9 initializes the control table 8. Details of the operations of the failure recording means 5 and the overwriting prohibition releasing means 9 will be described later.

  Abnormal data collectors (engineers, drivers, etc.) collect external data for the day by connecting an external device (personal computer, PDA, etc.) to the vehicle failure recording device 12 at the end of one day of driving, for example. . The failure record reading means 10 extracts data stored in the failure record memory 7 in response to a request from the external device 11 and provides it to the external device 11.

  FIG. 2 is a diagram illustrating a configuration of the failure recording memory 7 provided in the vehicle failure recording apparatus 12 according to the first embodiment.

  The failure recording memory 7 is provided with storage areas 1 to n for storing a plurality (n) of abnormal data. The size of each storage area is the same, and data collected in one occurrence of abnormality is stored in one storage area. The storage area is used cyclically, and a new failure record is overwritten on the failure record in the oldest storage area.

  FIG. 3 is a diagram illustrating the contents of the control table 8 provided in the vehicle failure recording apparatus 12 according to the first embodiment.

  In the first embodiment, a method for prohibiting overwriting of a failure that has occurred first from a predetermined starting point as a predetermined failure will be described. That is, a method for prohibiting a specific one storage area from being overwritten and erased will be described.

  “Overwrite prohibition valid / invalid” designates whether the operation for prohibiting the first failure record from being overwritten and erased is valid or invalid. The “overwrite prohibition index” represents the number (1 to n) of the storage area where overwriting is prohibited. That is, it represents the number (1 to n) of the storage area in which a failure record that has occurred first from a predetermined starting point is stored. “Occurrence date and time” is the date and time when the state monitoring unit 2 detects a failure. The “latest index” represents the number (1 to n) of the storage area in which the latest failure record is stored.

  The “overwrite prohibition period” represents a period during which the first failure record is prohibited from being overwritten and erased. This period is expressed in hours or days. That is, after the “overwrite prohibition period” has elapsed from the “occurrence date and time”, the failure record can be overwritten and erased.

  FIG. 4 is a flowchart showing a processing procedure of the overwriting prohibition releasing means 9 provided in the vehicle failure recording apparatus 12 of the first embodiment. The overwriting prohibition canceling means 9 is activated at a predetermined cycle and checks whether or not the “overwrite prohibition period” has elapsed.

  In step S01, the overwriting prohibition canceling means 9 acquires the current time. In step S <b> 02, the overwriting prohibition releasing unit 9 calculates the elapsed time from the “occurrence date” in the control table 8 and the current time. In step S03, the overwriting prohibition canceling means 9 checks whether or not the calculated elapsed time is longer than the “overwrite prohibition period”. If the “overwrite prohibition period” has not been exceeded (NO in step S03), this process ends.

  If the “overwrite prohibition period” is exceeded (YES in step S03), the overwrite prohibition operation is stopped. That is, “overwrite prohibition valid / invalid” in the control table 8 is invalidated. In addition, the “overwrite prohibition index” is cleared. Then, this process ends.

  FIG. 5 is a flowchart illustrating a processing procedure of the failure recording unit 5 provided in the vehicle failure recording apparatus 12 according to the first embodiment. The failure recording unit 5 is activated by the state monitoring unit 2 when a failure occurs, and stores the failure record in the failure recording memory 7.

  In step S11, the failure recording means 5 sets the address obtained by adding 1 to the “latest index” of the control table 8 as the address of the storage area of the failure recording memory 7 in which the failure record is to be stored. That is, the “latest index” in the control table 8 is updated to a value obtained by adding 1. In step S <b> 12, the failure recording unit 5 checks “overwrite prohibition valid / invalid” in the control table 8 and determines whether or not the overwrite prohibition process is valid.

  In the initial state, “overwrite prohibition valid / invalid” is invalidated by the processing of the overwrite prohibition release means 9 described in FIG. Therefore, if “overwrite prohibition valid / invalid” is invalid (NO in step S12), the current failure record is the first failure record that has occurred in the vehicle, so that the failure record is overwritten and erased. Execute the prohibited process.

  In step S <b> 13, the failure recording unit 5 checks whether or not the “latest index” updated in step S <b> 11 exceeds the maximum number of storage areas (n) of the control table 8. When the “latest index” does not exceed the maximum storage area number (n) of the control table 8 (NO in step S13), the process of step S15 is executed. When the “latest index” exceeds the maximum storage area number (n) of the control table 8 (YES in step S13), the failure recording means 5 sets “latest index” to 1 in step S14, and this time The address of the storage area for storing the failure record is set to 1.

  In step S <b> 15, the failure recording unit 5 sets “overwrite prohibition valid / invalid” in the control table 8 to be valid. Then, the failure recording means 5 sets the value of “latest index” to “overwrite prohibition index” of the control table 8. By this processing, it is set that the storage area in which the current failure record is written is the overwrite prohibition area. In step S20, the failure recording means 5 stores the failure record in the storage area of the address indicated by “latest index”. Then, this process ends.

  If “overwrite prohibition valid / invalid” is valid (YES in step S12), in step S16, the failure recording means 5 determines whether the “latest index” in the control table 8 matches the “overwrite prohibition index”. Investigate. That is, it is checked whether or not the storage area where the failure record is to be stored is prohibited from being overwritten. If the storage area where the failure record is to be stored is not overwritten (NO in step S16), the process of step S18 is executed. If the storage area in which the failure record is to be stored is prohibited from being overwritten (YES in step S16), 1 is added to the “latest index” in step S17, and the storage area in which the failure record is to be stored is determined. Set as the next storage area.

  In step S <b> 18, the failure recording unit 5 checks whether the “latest index” exceeds the maximum number of storage areas (n) of the control table 8. When the “latest index” does not exceed the maximum storage area number (n) of the control table 8 (NO in step S18), the process of step S20 is executed. When the “latest index” exceeds the maximum number of storage areas (n) of the control table 8 (YES in step S18), in step S19, the failure recording means 5 sets “latest index” to 1, and this time The address of the storage area to store is set to 1.

  In step S20, the failure recording means 5 stores the failure record in the storage area of the address indicated by “latest index”. Then, this process ends.

  According to the first embodiment described above, the first failure record that has occurred in the vehicle from a predetermined starting point is prohibited from being overwritten and deleted, and the prohibition process is performed from the date and time when the failure has occurred. Can continue until time passes.

[Second Embodiment]
The second embodiment is different from the first embodiment in that a plurality of predetermined failure records are recorded in the failure recording memory 7. Parts having the same functions as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 6 is a diagram illustrating the contents of the failure recording memory 7 provided in the vehicle failure recording apparatus 12 according to the second embodiment.

  The failure recording memory 7 is provided with storage areas 1 to n for storing a plurality (n) of abnormal data. The size of each storage area is the same, and data collected in one occurrence of abnormality is stored in one storage area. The storage area is used cyclically, and a new failure record is overwritten on the failure record in the oldest storage area. In the second embodiment, failure records stored in a plurality of storage areas are prohibited from being overwritten. For example, as shown in FIG. 6, the three storage areas of storage area 2, storage area j, and storage area (n-1) are prohibited from being overwritten.

  FIG. 7 is a diagram illustrating the contents of the control table 18 provided in the vehicle failure recording apparatus 12 according to the second embodiment. The control table 18 is provided with a common definition area 18a and an individual definition area 18b. In the common definition area 18a, values commonly applied to a plurality of failure records are defined. In the individual definition area 18b, values individually applied to a plurality of failure records are defined.

  The common definition area 18a is provided with “maximum overwrite prohibition number”, “overwrite prohibition number”, “latest index”, and “overwrite prohibition period”.

  The “maximum overwrite prohibition number” is a maximum value of the number of failure records for which overwrite is prohibited. The “overwrite prohibition number” indicates the number of failure records for which overwrite is currently prohibited.

  The “latest index” represents the number (1 to n) of the storage area in which the latest failure record is stored. The “overwrite prohibition period” represents a period during which failure records are prohibited from being overwritten and erased.

  In the individual definition area 18b, an “overwrite prohibition index” and an “occurrence date / time” are provided corresponding to each failure record. Note that the information in the common definition area is stored by being left-justified.

  The “overwrite prohibition index” represents the number (1 to n) of the storage area where overwriting is prohibited. That is, it represents the number (1 to n) of the storage area where a predetermined failure record generated in the vehicle is stored. “Occurrence date and time” is the date and time when the state monitoring unit 2 detects a failure.

  FIG. 8 is a flowchart showing a processing procedure of the overwriting prohibition releasing means 9 provided in the vehicle failure recording apparatus 12 of the first embodiment. The overwriting prohibition canceling means 9 is activated at a predetermined cycle and checks whether or not the “overwrite prohibition period” has elapsed.

  In step S21, the overwriting prohibition release unit 9 acquires the current time. In step S22, the overwriting prohibition canceling means 9 checks the “overwrite prohibition number” in the common definition area 18a of the control table 8, and sets that number as the maximum value of the number of processing loops. And the process of step S23-step S25 is repeatedly performed.

  In step S <b> 23, the overwriting prohibition release unit 9 calculates the elapsed time from the “occurrence date” in the control table 8 and the current time. In step S24, the overwriting prohibition canceling means 9 checks whether or not the calculated elapsed time is longer than the “overwrite prohibition period”. If the “overwrite prohibition period” has not been exceeded (NO in step S24), the process returns to step S23 to execute the process. If the “overwrite prohibition period” is exceeded (YES in step S24), the overwriting prohibition operation for this failure record is stopped. That is, the “overwrite prohibition index” and “occurrence date” in the control table 8 are deleted. And it returns to step S23 and performs a process.

  After the processing of step S23 to step S25 is processed by “overwrite prohibition number”, the overwriting prohibition release unit 9 prepares the data in the individual definition area 18b to the front. Therefore, in the individual definition area 18b, the failure records are stored in the order of occurrence time, so that the efficiency of the failure record search processing and storage processing can be improved. Then, this process ends.

  FIG. 9 is a flowchart illustrating a processing procedure of the failure recording unit 5 provided in the vehicle failure recording apparatus 12 according to the second embodiment. The failure recording unit 5 is activated by the state monitoring unit 2 when a failure occurs, and stores the failure record in the failure recording memory 7.

  In step S31, the failure recording means 5 uses the address obtained by adding 1 to the “latest index” in the control table 8 as the address of the storage area of the failure recording memory 7 in which the failure record is to be stored. That is, the “latest index” in the control table 8 is updated to a value obtained by adding 1.

In step S32, the failure recording means 5 checks the “overwrite prohibition number” in the common definition area 18a of the control table 8, and sets the number as the maximum value of the number of processing loops. And the process of step S33-step S34 is repeated and performed. Here, the reason why the processing loop is configured is to cope with a case where there are continuous overwriting-prohibited failure records.

  In step S33, it is determined whether or not the storage area indicated by “latest index” is overwritten by checking the “overwrite-inhibited index”. If the storage area indicated by “latest index” is overwritten prohibited (YES in step S33), in step S34, the failure recording unit 5 sets the address obtained by adding 1 to the “latest index” in the control table 8 to the failure. The address of the storage area of the failure recording memory 7 where the record is to be stored is used. That is, the “latest index” in the control table 8 is updated to a value obtained by adding 1.

  If the storage area indicated by “latest index” is not overwrite-protected (NO in step S33), it is checked in step S35 whether or not the current failure corresponds to overwrite-protection. It is assumed that whether or not the failure is a target of overwriting prohibition is acquired by a separate means (not shown). If the current failure is a failure corresponding to overwriting prohibition (YES in step S35), in step S36, it is checked whether or not the “maximum number of overwriting prohibition” will be exceeded by the current failure record. That is, it is checked whether the “overwrite prohibition number” in the control table 8 is equal to the “overwrite prohibition maximum number”.

  If the current failure record does not exceed the “maximum overwrite prohibition number” (YES in step S36), 1 is added to the “overwrite prohibition number” in the control table 8 in step S37. This updated “overwrite prohibition number” is set as K. In step S 38, the value of “latest index” is recorded in “overwrite prohibition index K” of the control table 8. Then, the date and time when the state monitoring unit 2 detects the failure is recorded in “occurrence date and time K”. In step S39, the failure recording means 5 stores the failure record in the storage area of the address indicated by “latest index”. Then, this process ends.

  If the current failure record exceeds the “maximum overwrite prohibition number” (NO in step S36), the failure recording means 5 stores the failure record in the storage area of the address indicated by “latest index”. Then, this process ends.

  If the current failure is not a failure corresponding to overwriting prohibition (NO in step S35), the failure recording means 5 stores the failure record in the storage area of the address indicated by "latest index". Then, this process ends.

  According to the second embodiment described above, a plurality of predetermined failure records that have occurred in the vehicle are prohibited from being overwritten and deleted, and a predetermined time has elapsed since the date and time when the failure occurred. Can continue until.

[Third embodiment]
The third embodiment is different from the second embodiment in that the possibility of overwriting and the overwriting prohibition period are variable depending on the type of failure and the driving state of the vehicle. Parts having the same functions as those of the second embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 10 is a diagram for explaining a method for controlling overwriting prohibition in the vehicle failure recording apparatus 12 according to the second embodiment.

  FIG. 10 shows whether or not overwriting is prohibited depending on the type of failure, and the overwriting inhibition period when overwriting is prohibited. For example, when a gate output abnormality occurs, the failure record at that time is prohibited from being overwritten, and the overwriting prohibited period is 72 hours (Hour). On the other hand, when a transmission abnormality occurs, the failure record at that time is not overwritten.

  Further, in addition to the contents shown in FIG. 10, whether or not to perform overwriting prohibition and the overwriting prohibition period in the case of overwriting prohibition corresponding to the operation state (for example, during low speed traveling or during high speed traveling) is set. You may prescribe.

  FIG. 11 is a diagram illustrating the contents of the control table 28 provided in the vehicle failure recording apparatus 12 according to the third embodiment. Unlike the second embodiment, the common definition area 18a of the control table 28 has no “overwrite prohibition period”, and the individual definition area 18b of the control table 28 has “overwrite prohibition index” and “ In addition to “occurrence date and time”, a “overwrite prohibition period” is newly provided corresponding to each failure record.

  Next, the processing procedure of the overwriting prohibition releasing unit 9 provided in the vehicle failure recording apparatus 12 according to the third embodiment will be described with reference to FIG. Steps S21 to S22 are the same as those in the second embodiment. In step S <b> 23, the overwriting prohibition release unit 9 calculates the elapsed time from the “occurrence date” in the control table 8 and the current time. In step S24, the overwriting prohibition canceling means 9 checks whether or not the calculated elapsed time is longer than the “overwrite prohibition period”. Here, a value defined for each failure record is used for the “overwrite prohibition period”.

  If the “overwrite prohibition period” is exceeded (YES in step S24), the overwrite prohibition operation for this failure record is stopped. That is, the “overwrite prohibition index”, “occurrence date / time”, and “overwrite prohibition period” of the control table 8 are deleted.

  With reference to FIG. 9, the processing procedure of the failure recording means 5 provided in the vehicle failure recording apparatus 12 of the third embodiment will be described. Steps S31 to S34 are the same as those in the second embodiment. In step S35, the failure recording means 5 determines whether or not the current failure is a failure corresponding to overwriting prohibition. Here, the failure recording unit 5 receives the type of failure that has occurred this time from the state monitoring unit 2, and makes the above-described determination based on the type of failure.

  Steps S36 to S37 are the same as those in the second embodiment. In step S 38, the value of “latest index” is recorded in “overwrite prohibition index K” of the control table 8. Then, the date and time when the state monitoring unit 2 detects the failure is recorded in “occurrence date and time K”. Furthermore, the overwrite prohibition period determined for the failure is recorded in the “overwrite prohibition period K”. In step S39, the failure recording means 5 stores the failure record in the storage area of the address indicated by “latest index”. Then, this process ends.

  According to the third embodiment described above, a plurality of predetermined failure records generated in the vehicle are prohibited from being overwritten, and the prohibition process is determined for each failure type from the date and time when the failure occurred. Until a predetermined time has elapsed.

  Note that the second and third embodiments described above are not limited to the first failure record that has occurred in the vehicle from a predetermined starting point, and overwriting prohibition records that satisfy a predetermined condition that occurs at an arbitrary timing is prohibited. Obviously, it can also be applied.

  Note that the functions described in the above-described embodiments are not limited to being configured using hardware, and can be realized by causing a computer to read a program describing each function using software. Each function may be configured by appropriately selecting either software or hardware.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.
Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

  DESCRIPTION OF SYMBOLS 1 ... Input means, 2 ... Status monitoring means, 3 ... Control means, 4 ... Control signal output means, 5 ... Failure recording means, 6 ... Situation recording memory, 7 ... Failure recording memory, 8 ... Control table, 9 ... Overwriting Prohibition canceling means, 10 ... failure record reading means, 11 ... external device, 12 ... vehicle failure recording device, 18 ... control table, 18a ... common definition area, 18b ... individual definition area, 28 ... control table.

Claims (7)

A status recording memory that records signals related to the driving status of electric vehicles collected at a predetermined period;
A fault record memory having a storage area for storing a fault record acquired at each occurrence of the fault;
A control table for storing prohibition information defining a storage area for prohibiting overwriting and a period for prohibiting overwriting of the storage area;
Select a storage area that is not overwritten based on the prohibition information,
Record the signal of the period including the time of occurrence of the failure in the failure recording memory as the failure record,
A vehicle failure recording device comprising: failure recording means for recording, in the control table, the prohibition information for prohibiting overwriting of the selected storage area for a predetermined period when the failure is a predetermined failure.   2. The vehicle failure recording apparatus according to claim 1, further comprising an overwrite prohibition canceling unit that updates the control table so that a storage area in which a period of prohibiting the overwrite has elapsed from the time of the failure has been canceled. .   The vehicle failure recording apparatus according to claim 2, wherein the predetermined failure is a failure that first occurs from a predetermined starting point.   The vehicle failure recording apparatus according to claim 2, wherein the failure recording unit determines whether the failure is a predetermined failure based on the type of the failure.   The vehicle failure recording device according to claim 4, wherein when the failure is a predetermined failure, the failure recording means records an overwriting prohibition period defined for the predetermined failure in the control table.   The vehicle failure recording apparatus according to claim 5, wherein the overwriting prohibition period is variably provided based on at least one of the predetermined failure type and an electric vehicle operating state. A status recording memory that records signals related to the driving status of electric vehicles collected at a predetermined period;
A fault record memory having a storage area for storing a fault record acquired at each occurrence of the fault;
A vehicle failure recording method for a vehicle failure recording apparatus, comprising: a storage area that prohibits overwriting of the storage area and a control table that stores prohibition information that defines a period during which overwriting is prohibited,
Select a storage area that is not overwritten based on the prohibition information,
Record the signal of the period including the time of occurrence of the failure in the failure recording memory as the failure record,
A vehicle failure recording method comprising: recording the prohibition information for prohibiting overwriting the selected storage area for a predetermined period when the failure is a predetermined failure.

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