JPH09311094A - Apparatus for collecting data for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently preserve data of a plurality of systems having different sampling intervals in a limited memory capacity. SOLUTION: The apparatus has a recorded data-processing means 40 for processing vehicle data recorded to a rolling RAM 30. The recorded data- processing means 40 extracts vehicle data of the longest sampling interval and preserves the whole data in a driving state-preserving means 50. The other data are substituted with characteristic vehicle data based on a comparison reference value stored in a comparison data-storing means 46 from data included in the sampling intervals, extracted and preserved in the driving state-preserving means 50.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection device for acquiring vehicle data from an electronic vehicle control system, and when data output from a plurality of systems having different sampling intervals is stored, characteristic data is stored. The present invention relates to a vehicle data collection device capable of minimizing the amount of stored data by extracting.

[0002]

2. Description of the Related Art An electronic control system is used for a variable intake / exhaust system, a variable valve timing control system, a fuel injection system, an ignition system, etc. used in an engine system of an automobile, or an automatic transmission.
The electronic control controller controls the drive of various actuators based on vehicle environment data detected by various sensors. Then, in order to take out vehicle data inside a CPU (Central Processing Unit) of such an electronic controller and use it for failure analysis and the like, a data collection device is used in the market.

This type of data collecting device extracts input / output value data and failure diagnosis result data in the controller by performing serial communication with the controller. I / O values of actuators and actuators, control values of controllers, and output request signals for failure diagnosis results,
Input / output value data and failure diagnosis result data corresponding to the output request signal are returned from the controller side to the data collection device side.

The data collector continuously stores the received vehicle data in the rolling RAM, and when it wants to take out the data, it generates a trigger to roll the vehicle.
Stop memory in AM. And rolling RAM
The vehicle data is written in a data storage area provided separately from the above, and is taken out by an external device and used for failure analysis or the like.

[0005]

By the way, in the conventional data collecting apparatus, when recording the data output from a plurality of in-vehicle systems, the data of each system is recorded in the rolling RAM provided for each system. It For example, the record data of the engine system is recorded in the first rolling RAM, and the record data of the automatic transmission system is recorded in the second rolling RAM.

Further, the sampling speed of data recording (in other words, the sampling interval) differs depending on the system. Therefore, when recording data of a plurality of systems,
For example, an engine system has a 10 ms interval, an automatic transmission system has a 30 ms interval,
It is recorded in each rolling RAM.

In the failure analysis of an automobile, it is not uncommon for the data of a plurality of systems to be simultaneously extracted and used for failure analysis, for example, by observing the behavior of an automatic transmission when the throttle of an engine is opened.

However, when recording data with different sampling speeds as described above is written in the storage area for storage, the conventional data collecting apparatus stores the data as it is without processing it, so that the storage capacity is constant. There was a problem that the number of data records could not be increased because there was a limit of.

The present invention has been made in view of the above-mentioned problems of the prior art. When the data of a plurality of systems having different sampling intervals are stored within a limited storage capacity, characteristic data can be obtained. It is an object of the present invention to provide a vehicle data collection device capable of minimizing the amount of stored data by extracting.

[0010]

In order to achieve the above object, a vehicle data collecting apparatus according to the present invention as set forth in claim 1,
In a vehicle data collection device that collects and saves vehicle data related to operating conditions from one or more electronic control systems mounted on the vehicle, the target system of the vehicle data to be collected, the item of the vehicle data to be collected, etc. Setting means for setting the vehicle data specifications of the vehicle, a driving state detecting means for detecting the driving state of the vehicle according to the contents set by the setting means, and temporarily recording the vehicle data detected by the driving state detecting means. A driving state temporary recording means; a recording data processing means for processing the vehicle data recorded in the driving state temporary recording means; and a driving state storage means for storing the vehicle data processed by the recording data processing means. Is characterized by.

In the vehicle data collecting device according to the present invention, when the target system of the vehicle data to be collected, the item of the vehicle data and the like are set by the setting means, the driving state detecting means determines the driving state of the vehicle according to the setting. The detected vehicle data is temporarily recorded in the driving state temporary recording means. At this time, since the vehicle data collecting device according to claim 1 has the record data processing means for processing the vehicle data recorded in the driving state temporary recording means, the vehicle recorded in the driving state temporary recording means. The data is appropriately processed by the recorded data processing means, and then stored in the operating state storage means. Therefore, even if the operating state storage means has a limited storage capacity, it is possible to obtain the minimum necessary data while achieving the purpose of collecting the vehicle data by appropriately performing the processing by the recording data processing means.

In the vehicle data collecting device according to the first aspect, the processing content of the recording data processing means is not particularly limited, and can be appropriately determined according to various conditions such as vehicle data to be collected and the storage capacity of the driving state storage means. However, in the vehicle data collection device according to claim 2, the recording data processing unit compares the sampling intervals of the vehicle data recorded in the driving state temporary recording unit, and the vehicle data is sampled at the highest sampling interval. Sampling interval comparison means for separating long maximum sampling interval data and other extraction target data, comparison data storage means for storing a predetermined comparison reference value, and maximum sampling interval separated by the sampling interval comparison means From the extraction target data included during the sampling interval of the data, the comparison data storage And a stored data extracting means for extracting the vehicle data is characterized based on the comparison reference value stored in the stage, to the operating state storage means from the recording data processing means, the maximum sampling interval data,
The vehicle data extracted by the saved data extraction means is transmitted.

In the vehicle data collecting device according to the second aspect of the present invention, the sampling interval comparison means compares the sampling intervals of the vehicle data recorded in the driving state temporary recording means to obtain the maximum sampling with the longest sampling interval. The interval data is extracted, and this and other extraction target data are separated. In other words, the vehicle data with the longest sampling interval is the vehicle data with the smallest number of data. Therefore, other vehicle data, that is, the extraction target data is processed based on this maximum sampling interval data.

Since the number of data to be extracted is larger than that of the maximum sampling interval data by the amount included in the sampling interval of the maximum sampling data, the saved data extracting means extracts these vehicle data. ,
After making the characteristic vehicle data based on the comparison reference value stored in the comparison data storage means, the vehicle data and the maximum sampling interval data are sent to the driving state storage means.

As described above, in the vehicle data collecting device according to the second aspect, even when collecting a plurality of groups of vehicle data having different sampling intervals, the number of data is based on the vehicle data group having the smallest number of data. Since the vehicle data of other vehicle data groups that have a lot of data is thinned out while being characterized, it is possible to obtain the minimum necessary data while achieving the purpose of collecting the vehicle data, even if the operating state storage means has a limited storage capacity. You can

In the vehicle data collecting device according to the second aspect, the data extraction content of the saved data extracting means is not particularly limited as long as characteristic vehicle data can be extracted, but the vehicle data collecting device according to the third aspect. An average data extracting means for calculating an average value of the extraction target data included in the sampling intervals of the maximum sampling interval data sorted by the sampling interval comparing means, and the sampling interval comparison The difference between the extraction target data included in the sampling interval of the maximum sampling interval data separated by the means and the comparison reference value stored in the comparison data storage means is obtained, and the absolute value of the difference becomes maximum. Maximum change data extraction means for extracting vehicle data, The maximum sampling interval data, the average value of the vehicle data extracted by the average data extraction means, and the maximum change data extracted by the maximum change data extraction means are sent to the driving state storage means. And

In the vehicle data collecting apparatus according to the third aspect of the present invention, when the extraction target data is processed, the average value of the extraction target data included within the sampling interval of the maximum sampling interval data and its absolute value change to the maximum. The extracted vehicle data is extracted. Then, the maximum sampling interval data, the average value of the extraction target data, and the maximum change data of the extraction target data are sent to the operating state storage means.
As described above, in the vehicle data collection device according to the third aspect, since the average value and the maximum change data are selected as the characteristic vehicle data when processing the extraction target data, it is assumed that the number of data is reduced. However, the data meaning of those data can be maintained as it is, and the purpose of collecting vehicle data can be sufficiently achieved.

In the vehicle data collecting device according to the second and third aspects, the comparison reference value stored in the comparison data storing means can be input as a constant value in advance, but the vehicle data according to the fourth aspect. In the collecting device, the comparison data storage means uses the average value of the extraction target data calculated by the average data extraction means as an initial comparison reference value, and thereafter, the maximum change data extracted by the maximum change data extraction means in sequence. Is used as a comparison reference value.

In the vehicle data collecting device according to the fourth aspect, the average value of the extraction target data is used as the initial comparison reference value,
Since the comparison reference value is sequentially replaced with the maximum change data, the maximum change data extracted by the maximum change data extracting means represents the change over time as it is. Therefore, not only the average value of the data values but also the increase / decrease of the data value can be determined at a glance only by looking at the maximum change data stored in the operating state storage means.

[0020]

According to the vehicle data collecting apparatus of the first aspect, the vehicle data recorded in the driving state temporary recording means is appropriately processed by the recorded data processing means and then stored in the driving state storage means. Since the data is stored, even if the operating state storage means has a limited storage capacity, it is possible to obtain necessary vehicle data while achieving the purpose of collecting vehicle data.

According to the vehicle data collecting apparatus of the second aspect, when collecting a plurality of groups of vehicle data having different sampling intervals, another vehicle having a large number of data is based on the vehicle data group having the smallest number of data. Since the vehicle data of the data group is thinned out while being characterized, it is possible to obtain the necessary data while achieving the purpose of collecting the vehicle data even with the driving state storage means having a limited storage capacity.

According to the vehicle data collecting device of the third aspect, since the average value and the maximum change data are selected as the characteristic vehicle data in processing the extraction target data, the number of data is reduced. However, the data significance of those data can be maintained as it is,
The purpose of collecting vehicle data can be fully achieved.

According to the vehicle data collecting apparatus of the fourth aspect, since the average value of the extraction target data is used as the comparison reference value and sequentially replaced with the maximum change data, the maximum change data extracted by the maximum change data extraction means is used. Represents the change over time as it is, and by looking at the maximum change data stored in this operating state storage means, not only the average of the data values,
The increase or decrease of the data value can be judged at a glance.

[0024]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a vehicle data collection device of the present invention, FIG. 5 is a diagram for explaining an information processing procedure in a saved data extraction means, and FIG.
FIG. 7 is a diagram showing a recording system of the operating state temporary recording means, and FIG. 7 is a diagram showing a data format recorded in the operating state temporary recording means.

As shown in FIG. 1, the vehicle data collection device of this embodiment performs, for example, serial communication with electronic control systems 60a, 60b, ... The vehicle electronic control systems 60a and 60b include sensors for detecting environmental data regarding actuators to be controlled, and the vehicle data detected by these sensors are sent to a microcomputer. After a predetermined calculation is performed in, the calculation result is sent to the actuators. Further, a predetermined self-fault diagnosis is also performed inside the microcomputer.

Electronic control systems 60a, 60b for automobiles
The input / output values of the sensors and actuators and the diagnostic result data stored in the are stored in the vehicle data collection device of the present embodiment, and the request signal from the driving state detection means 10 is sent to the electronic control systems 60a and 60b. Sent to.

The setting means 20 inputs and stores an electronic control system as a target of vehicle data to be collected, an item of the vehicle data, and other vehicle data specifications. For example, an engine control system as a target electronic control system. And an automatic transmission system are set, and the engine speed is set in the engine system and the shift position is set in the transmission system as items of vehicle data. These settings are made by the operator and input from a keyboard, buttons, touch screen, or the like. In addition to directly inputting to the setting means, for example, a personal computer, which is an external device, may be used to set a collection data system or items, and this program may be downloaded to the data collection device to substitute for the setting means 10. it can.

The operating state detecting means 20 requests the electronic control systems 60a and 60b for the target system or item of the vehicle data set in the setting means 10, and the request signal is sent via the communication line to the electronic control system 60a and 60b. 60b, the corresponding vehicle data is returned from the electronic control systems 60a and 60b via the communication line, and is written in the driving state temporary recording means 30 via the driving state detecting means 10.

The operating state temporary recording means 30 is a memory that sequentially stores the vehicle data returned from the electronic control systems 60a and 60b, and sequentially updates the oldest vehicle data when the storage capacity is exceeded and continuously stores the vehicle data. , Rolling RAM. The rolling RAM 30 is
As shown in the upper diagram of FIG. 6, when the acquisition memory becomes full, for example, when the acquisition memory becomes full, the collected data is written into the acquisition memory of N bytes × M rows from the address of A + N bytes. As shown in the lower figure, the RAM adopts a storage system in which the address A + N bytes at the head address is overwritten again.

The operating state temporary recording means 30 is shown in FIG.
Data is written in the data format shown in (1), and one rolling RAM 30 is prepared for each electronic control system.

The vehicle data recorded in each rolling RAM 30 is sent to the recorded data processing means 40, processed, and then recorded in the driving state storage means 50. The recorded data processing means 40 of the present embodiment comprises a sampling interval comparison means 42, a stored data extraction means 44 and a comparison data storage means 46. The stored data extraction means 44 further comprises an average data extraction means 44a and a maximum change data extraction means. Four
4b.

The sampling interval comparing means 42 compares the sampling intervals T of the vehicle data recorded in each rolling RAM 30 to identify the vehicle data of the target system having the longest sampling interval T, and recognizes this as the maximum sampling interval data. To do. Vehicle data of other target systems are recognized as extraction target data. For example, in the above example, the sampling interval of the engine system is 10m.
Since the sampling interval of the transmission system is 30 ms, the vehicle data of the transmission system is the maximum sampling interval data and the vehicle data of the engine system is the extraction target data in this case.

The comparison data storage means 46 is a memory for storing a predetermined comparison reference value, and is composed of a RAM different from the rolling RAM 30 in this embodiment. The comparison data storage means 46 includes a saved data extraction means 44.
In the present embodiment, the average value of the extraction target data calculated by the average data extracting means 44a becomes the initial reference value, and the comparison reference value used in the above is stored as the maximum change data sequentially. Will be replaced.

The stored data extraction means 44 changes the extraction target data included in the sampling interval T of the maximum sampling interval data sorted by the sampling interval comparison means 40 into the comparison reference value stored in the comparison data storage means 46. It is a means for extracting characteristic vehicle data on the basis of the characteristic data, and is specifically composed of an average data extracting means 44a and a maximum change data extracting means 44b.

The average data extraction means 44a is a means for calculating the average value of the extraction target data classified by the sampling interval comparison means 42, and this average value is sent to the driving condition storage means 50 as characteristic vehicle data and recorded. To be done. At the same time, it is sent to the comparison data storage means 46 and temporarily stored as an initial comparison reference value when the maximum change data is extracted.

The maximum change data extraction means 44b includes extraction target data included in the sampling interval T of the maximum sampling interval data sorted by the sampling interval comparison means 42, and the comparison reference value stored in the comparison data storage means 46. Is a means for obtaining the difference between the vehicle data and the vehicle data having the maximum absolute value of the difference, and the maximum change data extracted here is sent to and recorded in the driving state storage means 50 as characteristic vehicle data.

For example, as shown in FIG. 5, the system A (transmission system,
When the vehicle data of the maximum sampling interval data) and the system B (engine system, extraction target data) having a sampling interval shorter than this are simultaneously taken out, the vehicle data of the system B is 3 times during the sampling interval T of the system A. Will be included.

In this example, first, the average value of the vehicle data of the system B is obtained and sent to the driving condition storage means 50 for recording, and at the same time, sent to the comparison data storage means 46 for storage and the comparison reference value S is obtained. To do. Then, each of the vehicle data b1, b1 ', b1 "of the system B included in the sampling interval t1 to t2 of the system A and the comparison reference value S.
And vehicle data with the largest absolute value of the difference b1,
The representative values of b1 'and b1 "are sent to and recorded in the operating state storage means 50. Further, the representative values are sent to the comparison data storage means 46 and stored therein, and are used as new comparison reference values.

In the example shown in FIG. 5, since all the vehicle data are equal to the comparison reference value S, the vehicle data b1 at the top is stored as a representative value, for example. Similarly, regarding the vehicle data b2, b2 ′, b2 ″ of the system B included in the sampling interval t2 to t3 of the system A,
The representative value is b2, the new comparison reference value is also b2, and regarding the vehicle data b3, b3 ′, b3 ″ of the system B included in the sampling intervals t3 to t4, the representative value is b3 ″, the new comparison reference. The value is also set to b3 ″.

In this way, the recording data processing means 40
The vehicle data is processed by the above, and the maximum sampling interval data, that is, all vehicle data a1, a2, a3, ...
Average value of vehicle data extracted in a, that is, system B
The average value S of all vehicle data of the above and the maximum change data b of the system B extracted by the maximum change data extracting means 44b.
, B2, b3 ″, ... will be transmitted.

Next, the operation will be described. 2 to 4 are flowcharts showing an information processing procedure in the recording data processing means. Prior to this procedure, the operation state detecting means 10 controls the electronic control systems 60a and 60b according to the contents set by the setting means 20. The predetermined vehicle data is read out and recorded in the rolling RAM 30.

When the recording in each rolling RAM 30 is completed, the sampling interval comparison means 42 reads out the recording time of the first vehicle data from the rolling RAM 1 in which the vehicle data of the system A is recorded and substitutes it into T1. Read the recording time of the second vehicle data
Substituting into 2, the difference T2-T1 is taken as TA (steps 10-12). Similarly, the recording time of the first vehicle data is read from the rolling RAM 2 in which the vehicle data of the system B is recorded and substituted into T1, and the recording time of the second vehicle data is read out and substituted into T2.
The difference T2-T1 is set to TB (steps 13 to 1).
5).

The sampling intervals TA and TB obtained in steps 12 and 15 are compared (steps 16 and 1).
8) When the sampling interval TA of the system A is longer, the variable A is 0, the variable X is 1, and the variable Y is 2. Conversely, when the sampling interval TB of the system B is longer, A is 0, variable X is 2, and variable Y is 1 (steps 19 and 20). As a result, the maximum sampling interval data and the extraction target data are separated.

Then, in order to record all the maximum sampling interval data in the operating condition storing means 50, the number of data of the system having a long sampling interval is counted and set as N in step 21, and the system is sequentially arranged from the first vehicle data. Alternately record vehicle data for A and System B. That is, in step 22, M is set to 1 and the first vehicle data of the vehicle data having the longer sampling interval is written in the driving state storage means 50 (steps 22, 23, 2).
4, 26). At this time, the vehicle data input order (for example, system A → system B) and each rolling RA are stored in the driving state storage unit 50 before writing the first vehicle data.
An item (for example, engine speed) of the vehicle data recorded in M is written (step 25).

When the Mth vehicle data of the system having a long sampling interval is written, the recording time of the Mth vehicle data of the rolling RAM is set to T1, and the recording time of the M + 1th vehicle data is set to T2 (steps 29, 3).
0), recording time T1 to the other rolling RAM
Among the vehicle data of T2, the vehicle data having the largest absolute value of the difference compared with the comparison reference value D1 stored in the comparison data storage means 46 is written in the driving state storage means 50 (step 34). However, when writing the first vehicle data, the recording times T1 to T1 in the other rolling RAM are written.
The average value of the vehicle data of T2 is calculated and written in the comparison data storage means 46, and this average value is written in the driving state storage means 50 (steps 32 and 33).

Next, M is incremented by 1 (step 35) and the routine proceeds to step 23, and the above processing is repeated until the vehicle data number N of the system having a long sampling interval is reached. As a result, the vehicle data in the rolling RAMs 1 and 2 are alternately written in the driving state storage means 50.

In step 16, if the sampling intervals TA and TB are equal, it is not necessary to process the vehicle data by the recording data processing means 40.
Proceed to step 17, variable A is 0, variable X is 1, variable Y
Is set to 2, and after passing through steps 21, 22, 23, and 25, the vehicle data in one rolling RAM is written in the driving state storage means 50 in step 26, and the process proceeds from step 27 to step 28 to roll the other rolling. RA
The vehicle data of M is written in the driving state storage means 50. By repeating this up to the data number N, the vehicle data of any system is stored in the driving state storage means 50.

As described above, in the vehicle data collection device of this embodiment, even if the sampling interval is different and the number of data is different, the characteristic value is selected and recorded from the vehicle data group having a large number of data. Even if the storage capacity of the operating state storage means 50 is small, this can be dealt with without impairing the reliability of the data.

The embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle data collection device of the present invention.

FIG. 2 is a flowchart showing an information processing procedure in a recorded data processing unit of the vehicle data collection device shown in FIG.

3 is a flowchart showing an information processing procedure in a recorded data processing means of the vehicle data collection device shown in FIG.

4 is a flowchart showing an information processing procedure in a recorded data processing means of the vehicle data collection device shown in FIG.

5 is a diagram for explaining an information processing procedure in the stored data extraction means of the vehicle data collection device shown in FIG.

6 is a diagram showing a recording method of a driving state temporary recording means of the vehicle data collection device shown in FIG.

7 is a diagram showing a data format recorded in a driving state temporary recording means of the vehicle data collection device shown in FIG.

[Explanation of symbols]

 10 ... Operating state detecting means 20 ... Setting means 30 ... Rolling RAM (operating state temporary recording means) 40 ... Record data processing means 42 ... Sampling interval comparing means 44 ... Saved data extracting means 44a ... Average data extracting means 44b ... Maximum change data Extraction means 46 ... Comparison data storage means 50 ... Operating state storage means 60a, 60b ... Electronic control system

Claims (4)

[Claims] 1. A vehicle data collection device for collecting and storing vehicle data relating to a driving state from one or more electronic control systems mounted on a vehicle, a target system of vehicle data to be collected, and to be collected. Setting means for setting vehicle data items and other vehicle data specifications, driving state detecting means for detecting a driving state of the vehicle according to the setting contents by the setting means, and vehicle data detected by the driving state detecting means. A driving state temporary recording means for temporarily recording, a record data processing means for processing the vehicle data recorded in the driving state temporary recording means, and a driving state saving for storing the vehicle data processed by the record data processing means A data collection device for a vehicle, comprising: 2. The recording data processing means compares the sampling intervals of the vehicle data recorded in the driving state temporary recording means, and compares the vehicle data with the maximum sampling interval data having the longest sampling interval and other data. Sampling interval comparison means for classifying into extraction target data, comparison data storage means for storing a predetermined comparison reference value, and the sampling interval of the maximum sampling interval data classified by the sampling interval comparison means. From the extraction target data, and a storage data extraction means for extracting characteristic vehicle data based on the comparison reference value stored in the comparison data storage means, from the recording data processing means to the operating state storage means,
The vehicle data collection device according to claim 1, wherein the maximum sampling interval data and the vehicle data extracted by the stored data extraction means are transmitted. 3. The average data extracting means for calculating the average value of the extraction target data sorted by the sampling interval comparing means, and the maximum sampling interval sorted by the sampling interval comparing means. Maximum change data extraction for obtaining the difference between the extraction target data included in the data sampling interval and the comparison reference value stored in the comparison data storage means, and extracting the vehicle data having the maximum absolute value of the difference. Means, from the recorded data processing means to the operating state storage means,
3. The maximum sampling interval data, the average value of the vehicle data extracted by the average data extracting means, and the maximum change data extracted by the maximum change data extracting means are sent out. Vehicle data collection device. 4. The comparison data storage means uses an average value of the extraction target data calculated by the average data extraction means as an initial comparison reference value, and thereafter, the maximum change extracted by the maximum change data extraction means. The vehicle data collection device according to claim 3, wherein the data is used as a comparison reference value.