JP5672049B2 - Operating factor data storage device - Google Patents

Description

The present invention relates to an operation factor data storage device that inputs operation factor data capable of specifying an operation factor of a vehicle state in time series.

Conventionally, operation factor data that can identify an operation factor of a vehicle state is stored in a non-volatile memory in time series (corresponding to time data), and when an abnormal state (defect) of the vehicle occurs, A configuration is disclosed in which the cause of the abnormal state of the vehicle can be clarified by analyzing the operation factor data stored until the abnormal state occurs (see, for example, Patent Document 1).

JP 2009-205368 A

  In the configuration disclosed in Patent Document 1, since the storage area of the nonvolatile memory in which the operation factor data is stored is limited, the operation factor data is stored until there is no free area in the storage area of the nonvolatile memory. Then, new operating factor data is stored while erasing old operating factor data, that is, the operating factor data is stored cyclically (overwritten and updated).

However, even if the operation factor data is cyclically stored, if the operation factor data when the vehicle state is normal is stored for a long time, the operation factor data when the vehicle state is abnormal, that is, the vehicle It becomes difficult to store useful operating factor data that can elucidate the cause of the abnormal state of the vehicle, and as a result, it becomes difficult to elucidate the cause of the abnormal state of the vehicle.

The present invention has been made in view of the above-described circumstances, and its purpose is to provide a useful operating factor capable of elucidating the cause of an abnormal state of a vehicle by effectively using a storage area of a limited storage means. An object of the present invention is to provide an operating factor data storage device that can increase the possibility of leaving data and can appropriately elucidate the cause of an abnormal state of a vehicle.

According to the first aspect of the present invention, when the operation factor data capable of specifying the operation factor of the vehicle state is input in time series by the operation factor data input means, the comparison determination means is in time series by the operation factor data input means. The input operation factor data is compared with normal state data that can be specified that the vehicle state stored in the normal state data storage means is normal, and the operation factor data is data that can specify the normal state. It is determined whether or not. Here, the data conversion means can specify the operating factor data group composed of a plurality of operating factor data, each of which is determined to be data that can specify the normal state by the comparison determining means, and Conversion into conversion data having a capacity size smaller than that of the operating factor data group is performed. The storage control means stores the conversion data converted by the data conversion means in the storage means, and stores the operation factor data determined by the comparison determination means as not being data that can identify the normal state in the storage means.

As a result, it is possible to identify the operating factor data group consisting of a plurality of operating factor data determined to be data that can identify the normal state , and the capacity size is smaller than the operating factor data group. and stores the converted to the conversion data, i.e., by directly storing converted into converted data rather than storing a plurality of operation factor data when the vehicle state is normal, when the vehicle state is not normal It is possible to secure a storage area capable of storing the operation factor data. As a result, it is possible to increase the likelihood that can leave useful operation factor data which can clarify the cause of the abnormal condition of the vehicle, a cause of the abnormality state of the vehicle can be properly understood. Also, stores the converted data obtained by converting the plurality of operation factor data when the vehicle state is normal, by storing the operation factor data when the vehicle state is not normal, the vehicle state to abnormal from normal switching It is possible to specify the operation factor data before and after the vehicle is switched or before and after the vehicle state is switched from abnormal to normal (returned).

According to the second aspect of the present invention, the comparison / determination means compares the contents of the operation factor data input in time series by the operation factor data input means with the contents specified by the normal state data, It is determined whether or not the operation factor data is data that can identify a normal state . Thereby, by storing the operation factor data that does not match the content defined by the normal state data, it is possible to elucidate the cause of the abnormal state of the vehicle due to the fact that the content of the operation factor data is not normal.

According to the invention described in claim 3, the comparison / determination means compares the generation order of the operation factor data input in time series by the operation factor data input means with the generation order defined by the normal state data. Then, it is determined whether or not the operating factor data is data that can specify the normal state . As a result, by storing the operation factor data that does not match the generation order defined by the normal state data, it is possible to elucidate the cause of the abnormal state of the vehicle caused by the occurrence order of the operation factor data being not normal. .

According to the invention described in claim 4, the comparison / determination means compares the generation interval of the operation factor data input in time series by the operation factor data input means with the generation interval defined by the normal state data. Then, it is determined whether or not the operating factor data is data that can specify the normal state . Thereby, by storing the operation factor data that does not match the generation interval defined by the normal state data, it is possible to elucidate the cause of the abnormal state of the vehicle due to the occurrence interval of the operation factor data being not normal. .

Functional block diagram showing an embodiment of the present invention flowchart The figure which shows the aspect which memorize | stores operating factor data 3 equivalent figure

  Hereinafter, an embodiment in which the present invention is applied to an ECU mounted on a vehicle will be described with reference to the drawings. The ECU 1 mounted on the vehicle is interconnected with various switches 3 and various sensors 4 via a vehicle LAN 2. Examples of the various switches 3 include an ignition (IG) switch and an accessory (ACC) switch. Examples of the various sensors 4 include an acceleration sensor and an accelerator sensor.

The ECU 1 is a unit mainly composed of a microcomputer, and includes a control unit 5 and an external memory 6 (corresponding to storage means) provided separately from the control unit 5. The control unit 5 includes a signal input unit 7 (corresponding to an operation factor data input unit), an operation factor data extraction unit 8, an operation factor data storage unit 9, a first code replacement unit 10, and a normal state data storage unit 11. (Corresponding to normal state data storage means), comparison determination section 12 (corresponding to comparison determination means), second code replacement section 13 (corresponding to data conversion means), and storage control section 14 (corresponding to storage control means) And have.

  The signal input unit 7 has a communication function (input function) with the vehicle LAN 2, inputs signals output from the various switches 3 and various sensors 4 through the vehicle LAN 2, and operates the input signals. Output to the factor data extraction unit 8. When the signal output from the signal input unit 7 is input, the operation factor data extraction unit 8 demodulates the input signal to extract the operation factor data, and the extracted operation factor data is input to the operation factor data storage unit 9. Output. The operation factor data will be described later.

  The operation factor data storage unit 9 is constituted by NVRAM or SRAM, and when the operation factor data output from the operation factor data extraction unit 8 is input, the input operation factor data is stored together with time data. The time data may be data that can specify the generation order and generation interval of the operation factor data in time series, and is data that represents the time when the signal storing the operation factor data is input to the signal input unit 7. Alternatively, it may be data representing the time when the operation factor data is stored in the operation factor data storage unit 9.

  The operating factor data storage unit 9 keeps storing the operating factor data input from the operating factor data extraction unit 8 in time series when the power source of the ECU 1 is in the on state (normally activated state), thereby providing a plurality of operating factor data. And the operation factor data stored at that time is output to the first code replacement unit 10 at the timing when the power source of the ECU 1 is switched from the on state to the off state (low-consumption start state). In addition, the operating factor data storage unit 9 has a limited storage area for storing the operating factor data, and after storing the operating factor data until there is no free space for storing the operating factor data, the old operating factor data is stored. While erasing, new operating factor data is stored, that is, the operating factor data is stored cyclically (overwritten and updated).

  The first code replacement unit 10 stores a table of first code data corresponding to each of the operation factor data, and when the operation factor data stored in the operation factor data storage unit 9 is input, the input operation The factor data is replaced with corresponding first code data, and the replaced first code data is output to the comparison determination unit 12.

The normal state data storage unit 11 stores normal state data that can be specified that the vehicle state is normal (for example, the driver has normally performed a series of driving operations). The normal state data defines the contents, generation order, and generation interval of the operation factor data, and has the same data format as the first code data that replaces the operation factor data.

When the comparison determination unit 12 receives the first code data output from the first code replacement unit 10, the comparison determination unit 12 reads the normal state data stored in the normal state data storage unit 11 and inputs the normal state data from the first code replacement unit 10. a first code data, and compares the read out normal condition data from the normal state data storage unit 11. Here, if the vehicle state is normal (for example, if there is no problem during the period in which the driver normally performs a series of driving operations), the contents of the first code data, the generation order, and the generation interval are all what is defined by the normal state data, will be consistent with all the generation order and occurrence interval, whereas, (if not normal) if the vehicle state is abnormal (for example the driver normally a series of driving operations If there is a problem in the period during which the driver is operating, or if the driver performs an incorrect driving operation), the contents of the first code data, the generation order, and the generation interval are specified by the normal state data. It does not agree with any of the content, the generation order, and the generation interval.

Then, the comparison / determination unit 12 determines whether or not a predetermined number (plural) of first code data whose contents, occurrence order, and occurrence interval all match the normal state data are continued, and the contents, occurrence order, and occurrence interval. When all is determined that the first code data are consecutive predetermined number that matches the normal state data, the first code data of a predetermined number of them consecutive, and identified as data which can specify a normal state, their normal state Is output to the second code replacement unit 13 as a first code data group (corresponding to an operation factor data group) composed of a predetermined number of consecutive first code data. On the other hand, when the comparison determination unit 12 determines that the predetermined number of first code data whose contents, generation order, and generation interval all match the normal state data are not consecutive, or any of the content, generation order, and generation interval is If it is determined that the data does not match the normal state data, the first code data is specified as data that cannot specify the normal state, and the first code data that is specified as data that cannot specify the normal state is stored in the storage control unit. 14 to output.

  The second code replacement unit 13 corresponds to a first code data group made up of a predetermined number (several) of first code data (a second code corresponding to a predetermined number of continuous first code data). Data (corresponding to conversion data) is stored. That is, the second code data is data that can specify an operation factor data group corresponding to a first code data group composed of a predetermined number of first code data and has a smaller capacity size than the operation factor data group. . When the second code replacement unit 13 receives the first code data group output from the comparison determination unit 12, the second code data that represents the input first code data group together with the first code data group. And output to the storage control unit 14.

The storage control unit 14 receives the second code data output from the second code replacement unit 13, that is, the second code data that collectively represents the first code data group that is data that can specify the normal state of the vehicle. Then, when the input second code data is output to the external memory 6 and the first code data output from the comparison determination unit 12, that is, the first code data that is not data that can specify the normal state of the vehicle is input. The input first code data is output to the external memory 6.

  The external memory 6 is composed of an EEPROM (nonvolatile memory). When the first code data and the second code data output from the storage control unit 14 are input, the input first code data and second code data are stored. To do. In this case, the external memory 6 has a limited storage area in which the first code data and the second code data can be stored, and the first code data until there is no free space in which the first code data and the second code data can be stored. Or after storing the second code data, the new first code data or the second code data is stored while erasing the old first code data or the second code data, that is, the first code data or the second code data. Are stored cyclically (overwritten and updated).

The dedicated tool 15 is a device that reads the first code data and the second code data stored in the external memory 6, and is transmitted from the external memory 6 by performing data communication between the dedicated tool 15 and the ECU 1. The received first code data and second code data are received, and the first code data and the second code data are output so that the operator can recognize them. The operator who elucidates the cause of the abnormal state of the vehicle transfers the first code data and the second code data stored in the external memory 6 to the dedicated tool 15 in this way, and the transferred first code By outputting the data and the second code data in a recognizable manner, the first code data and the second code data stored in the ECU 1 can be analyzed, and the analyzed first code data and second code data can be analyzed. By identifying the operating factor data based on the data, it is possible to elucidate the cause of the abnormal state of the vehicle.

Next, the operation of the above configuration will be described with reference to FIGS.
When the power source of the ECU 1 is in the on state, the control unit 5 determines whether or not the state is continued, that is, whether or not the power source of the ECU 1 is switched from the on state to the off state (monitoring). (Step S1). When the control unit 5 determines that the power source of the ECU 1 is on ("YES" in step S1), the signal input unit 7 inputs the signals output from the various switches 3 and the various sensors 4, and then inputs the signals. The operating factor data is extracted from the signal by the operating factor data extracting unit 8, and the extracted operating factor data is stored in the operating factor data storage unit 9 together with the time data (step S2).

When the control unit 5 determines that the power source of the ECU 1 has been switched from the on state to the off state (“NO” in step S1), the control unit 5 stores the operation factor data stored in the operation factor data storage unit 9 in a corresponding manner. The 1-code data is replaced with 1-code data (step S3). Then, the control unit 5 includes a first code data obtained by replacing the operation factor data are compared by the comparison determination unit 12 and a normal state data stored in the normal state data storage unit 11 (step S4).

Here, as a result of comparing the first code data and the normal state data, the control unit 5 determines that a predetermined number of first code data whose contents, generation order, and generation interval all match the normal state data are consecutive. Then (“YES” in step S5), the predetermined number of consecutive first code data is specified as data that can specify a normal state (step S6), and is data that can specify these normal states. The second code replacement unit 13 replaces the first code data group composed of a predetermined number of consecutive first code data identified with the second code data by the second code replacement unit 13 (step S7), and stores and controls the replaced second code data The data is stored in the external memory 6 by the unit 14 (step S8).

On the other hand, as a result of comparing the first code data and the normal state data, the control unit 5 did not continue the predetermined number of first code data whose contents, generation order, and generation interval all match the normal state data. Alternatively, if it is determined that any of the contents, the occurrence order, and the occurrence interval does not match the normal state data (“NO” in step S5), the first code data is specified as not data that can specify the normal state. (Step S9), the first code data specified that the normal state is not identifiable data is directly stored in the external memory 6 by the storage control unit 14 (Step S10).

  Then, the control unit 5 replaces all the operation factor data stored in the operation factor data storage unit 9 with the first code data, converts it into the second code data, or stores it in the external memory 6 as it is. (Step S11), all the operation factor data stored in the operation factor data storage unit 9 are replaced with the first code data and converted into the second code data, or the external memory is used as it is. If it is determined that it is not stored in Step 6 (“NO” in Step S11), the process returns to Step S3 described above, and the processes after Step S3 are repeatedly executed. On the other hand, the control unit 5 replaces all the operation factor data stored in the operation factor data storage unit 9 with the first code data, converts it into the second code data, or stores it in the external memory 6 as it is. (“YES” in step S11), a series of processes will be described.

A specific example of the series of processes described above will be described with reference to FIGS.
As shown in FIG. 3 and FIG.
"Accessory on by switch-on operation"
"Ignition on by switch-on operation"
"Start parking brake control by switch-on operation"
"All-off by switch-on operation"
“Parking brake control completed successfully”
As the correspondence between the operation factor data indicating the operation factor and the first code data,
“Accessory on by switch-on operation”: “10”
“Ignition on by switch-on operation”: “20”
“Start parking brake control by switching on”: “30”
“All off by switch-on operation”: “40”
“Parking brake control completed successfully”: “50”
“All-off due to ignition circuit abnormality”: “A0”
Is defined by the first code replacement unit 10, and the correspondence between the first code data group capable of specifying the normal state of the vehicle and the second code data,
“10” to “50”: “0x01”
Will be described by the second code replacement unit 13.

The normal state data storage unit 11 stores the contents of “10”, “20”, “30”, “40”, “50”, and “10”, “20”, “30”, “40” as normal state data. , “50” (“10” immediately before “20”, “20” immediately before “30”, “30” immediately before “40”, “50” "40"), the occurrence interval ("20" occurs within a preset first time from the occurrence of "10", and "30" occurs at "20". The occurrence of “40” is within a preset second time from the occurrence, the occurrence of “40” is within a preset third time from the occurrence of “30”, and the occurrence of “50” is “40”. It is within the fourth time set in advance from the occurrence).

In this case, if the power source of the ECU 1 is in the ON state from “3:06:00” to “4:58:20”, the control unit 5 performs the “3:06:00” to “4:58”. The operation factor data generated at “20 minutes” is stored in the operation factor data storage unit 9. When the power source of the ECU 1 is switched from the on state to the off state after “4:58:20”, the control unit 5 operates the operation factor data stored in the operation factor data storage unit 9 at that time, that is, The operation factor data stored in the operation factor data storage unit 9 is converted into first code data in association with time data until immediately before the power source of the ECU 1 is switched from the on state to the off state. Then, the control unit 5 sequentially determines the contents, the occurrence order, and the occurrence intervals of the first code data associated with the time data in order of the oldest time data, and the contents, the occurrence order, and the occurrence intervals are all normal state data. It is determined whether a predetermined number (5 in this case) of the first code data that matches is continuous.

That is, the control unit 5 matches the normal state data with respect to the first code data “10” to “50” associated with the time data “t1” to “t5”. If the first code data “10” to “50” whose contents, generation order, and generation interval all match with the normal state data continues for a predetermined number (in this case, five), the first code data “10” to “50” continues. The 1-code data “10” to “50” is replaced with the second code data “0x01”, and the replaced second code data “0x01” is stored in the external memory 6. Similarly, for the first code data “10” to “50” associated with the time data “t6” to “t10”, the first code data “10” to “50” are changed to the second code data “0x01”. The replaced second code data “0x01” is stored in the external memory 6.

On the other hand, for the first code data “10”, “20”, “A0” associated with the time data “t11” to “t13”, the control unit 5 sets the contents, generation order, and generation interval of the time data. The determination is made sequentially from the oldest (from the first code data “10” associated with the time data “t11”). In this case, the first code data “A0” associated with the time data “t13” is the normal state data. Therefore, the first code data “10”, “20”, and “A0” are stored in the external memory 6 as they are.

  Similarly, the control unit 5 also uses the first code data “10” to “50” for the first code data “10” to “50” associated with the time data “t4” to “t18”. The second code data “0x01” is replaced, and the replaced second code data “0x01” is stored in the external memory 6.

That is, conventionally, as shown in FIG. 4, all the first code data in which the operation factor data is replaced is stored in the external memory 6 as it is, but in this embodiment, the first code data in which the operation factor data is replaced with the first code data Compared with normal state data, as shown in FIG. 3, when a predetermined number of first code data whose contents, generation order, and generation interval all match the normal state data are consecutive, a predetermined number of consecutive By replacing the 1-code data with the 2nd code data and storing it in the external memory 6, it is possible to secure a free space (to save bytes) in the external memory 6. and first code data predetermined number nonconsecutive what everything is consistent with the normal state data interval, contents, first code either order of occurrence and occurrence interval does not match the normal state data It is possible to secure a storable storage area over data.

By the way, in the specific example described above, an operation factor of “accessory on by switch-on operation” occurs, an operation factor of “ignition on by switch-on operation” occurs, and if normal, “parking brake control by switch-on operation” operation of what the place the operating factor occurs, if the operation factor of the "all-off by the ignition circuit abnormality" of contents which are not defined by the normal state data is generated, is not defined by its normal state data of the start " Although it has been described that the first code data in which the factor data is replaced is stored in the external memory 6 as it is, it may be as follows. That is, operation factor of what is defined by the normal state data is generated with different developmental order than the order of occurrence which is defined by a normal state data (the contents do not match is but matches occurrence order) or when a normal state The activation factor of the content specified by the data occurred at an occurrence interval different from the occurrence interval specified by the normal state data (the contents match but the occurrence interval does not match (the occurrence interval is too long or too short) In this case, the first code data obtained by replacing the operation factor data generated at the generation order or generation interval not defined by the normal state data may be stored in the external memory 6 as it is. With such a configuration, it is possible to leave operating factor data whose contents match but whose generation order and generation interval do not match.

As described above, according to the present embodiment, the ECU 1 replaces the operating factor data with the first code data, and specifies that the normal state of the vehicle can be specified in the replaced first code data. the first code data group including a plurality of first code data, substituted and stored into the second code data is smaller volume size than and the operation factor data can identify the operation factor data, i.e., the vehicle state Since the plurality of first code data when normal is not stored as it is, but is stored as one second code data, the second code data when the vehicle state is normal is stored long. Even if it continues, the storage area which can memorize | store the 1st code data when a vehicle state is not normal can be ensured. As a result, it is possible to increase the likelihood that may leave the first code data useful that can elucidate the cause of the abnormal condition of the vehicle, a cause of the abnormality state of the vehicle can be properly understood.

In addition, the plurality of first code data when the vehicle state is normal are collectively stored as one second code data, and the first code data when the vehicle state is not normal are stored as they are, so that the vehicle state The operation factor data before and after the vehicle is switched from normal to abnormal and before and after the vehicle state is switched from abnormal to normal (returned) can be specified.

The present invention is not limited to the above-described embodiment, and can be modified or expanded as follows.
The operating factor data may be data that can identify other events.
When the second code data “0x01” corresponding to the code data “10” to “50” that matches the normal state data is continuously stored, all of the second code data “0x01” is stored. Instead, frequency data indicating the number of times the second code data “0x01” continues may be generated, and the second code data “0x01”, time data, and frequency data may be stored in association with each other. With such a configuration, it is possible to further secure a storage area capable of storing the first code data when the vehicle state is not normal by eliminating the need to individually store the second code data “0x01”.

In the drawings, 1 is an ECU (operation factor data storage device), 6 is an external memory (storage means), 7 is a signal input unit (operation factor data input unit), and 10 is a normal state data storage unit (normal state data storage unit). , 12 is a comparison / determination unit (comparison / determination unit), 13 is a code replacement unit (data conversion unit), and 14 is a storage control unit (storage control unit).

Claims (5)

An operation factor data input means for inputting operation factor data capable of specifying the operation factor of the vehicle state in time series;
Normal state data storage means for storing normal state data identifiable as a vehicle state being normal;
Wherein the actuating factor data inputted in time series by the operation factor data input means, said comparing the normal state data stored in the normal state data storage means, in the operation factor data which can specify normal state data Comparison determination means for determining whether there is,
An operation factor data group consisting of a plurality of operation factor data, each of which has been determined to be data that can identify a normal state by the comparison and determination means, can be specified as the operation factor data group, and more than the operation factor data group Data conversion means for converting into converted data having a small capacity size;
Storage means capable of storing conversion data and operating factor data, and capable of outputting stored conversion data and operating factor data to the outside;
Storage control means for storing the conversion data converted by the data conversion means and the operation factor data determined by the comparison and determination means as not being data that can specify a normal state in the storage means, Operating factor data storage device. In the operation factor data storage device according to claim 1,
The comparison / determination unit compares the content of the operation factor data input in time series by the operation factor data input unit with the content defined by the normal state data, and the operation factor data can identify the normal state. An operating factor data storage device for determining whether or not the data is correct data. In the operation factor data storage device according to claim 1 or 2,
The comparison determination unit compares the generation order of the operation factor data input in time series by the operation factor data input unit with the generation order defined by the normal state data, and determines that the operation factor data is in a normal state . An operating factor data storage device for determining whether or not the data can be specified. In the operation factor data storage device according to any one of claims 1 to 3,
The comparison / determination unit compares the generation interval of the operation factor data input in time series by the operation factor data input unit with the generation interval defined by the normal state data, and determines that the operation factor data is in a normal state . An operating factor data storage device for determining whether or not the data can be specified. In the operation factor data storage device according to any one of claims 1 to 4,
The operating factor data input means is an operating factor data that can specify the operating factor of the vehicle state. The accessory on by the switch-on operation, the ignition on by the switch-on operation, the parking brake control start by the switch-on operation, An operating factor data storage device for inputting operating factor data indicating any one of off, parking brake control normal termination, and all-off due to ignition circuit abnormality.

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