JPH09304115A - Data analyzer for electronic control apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a data analyzer by which data is analyzed easily by a method wherein two data files are read out from a plurality of data files which are created as a data group indicating a change in terms of time in the data of an electronic control apparatus and graphs from both files are superposed and displayed. SOLUTION: A control circuit 1 comprises a CPU, and a display is built in it. An interface circuit 2 is provided with a monitor circuit 4, with an analog circuit 5 and with a bus connection circuit 6. By the command of the circuit 1, the circuit 4 receives and stores a plurality of data files as a data group indicating a change in terms of time in measured data from an ECU 3 at an electronic control apparatus. The CPU at the circuit 1 reads out two data files out of them, and graphs by data groups included in both data files are superposed and displayed on the display at the circuit 1. By this method, regarding a data group in different data files, their graphs are compared so as to analyze data easily.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data analysis device for accumulating and displaying actual data indicating an operating state of an electronic control device such as an electronic fuel injection device.

[0002]

2. Description of the Related Art As an electronic control unit, there is an engine control unit for controlling an operating state of an on-vehicle internal combustion engine to an optimum state. For example, in an internal combustion engine of a system for supplying fuel using a fuel injection valve, 2. Description of the Related Art There is a well-known electronic fuel injection device that controls the amount of fuel to be supplied by detecting the operating states of a vehicle and an engine using a sensor and calculating and controlling the detected amount according to the sensor detection value.

A control operation state of such an electronic control unit,
For example, tests are conducted by actually mounting an electronic control unit on a vehicle and operating an engine or running the vehicle in order to determine whether or not a sensor or a control unit main body is operating normally. . In the test, the sensor output value and the calculated value are sequentially sampled as data from the electronic control unit, stored in a memory as a data group for each operation parameter, and displayed on a display for analysis.

[0004]

By the way, such a test is usually performed many times, and a measurement data group for various operating parameters is obtained each time, so that an individual test is performed for each test. It is stored in memory as a data file. However, in data analysis, it is convenient to be able to analyze each data group included in different data files while comparing them at the same time, and accurate data display in accordance with such needs is desired.

Therefore, an object of the present invention is to provide a data analysis device of an electronic control device capable of simultaneously and accurately displaying a data group for each operation parameter contained in different data files.

[0006]

A data analysis device for an electronic control device according to the present invention is a data analysis device for displaying data on a display device based on actual data of operating parameters obtained during control in the electronic control device. And a data file storage means for storing a plurality of data files each of which is created as a data group indicating a time change of the actual data value of at least one operation parameter of the electronic control device, and at least two data from the data file storage means. A reading unit for reading each data of the file, a graph by a data group included in one of the at least two data files read by the reading unit, and a graph by a data group included in the other data file are displayed. And a display control means for superimposing display on the display.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. The data analysis device of the vehicle electronic control device shown in FIG. 1 includes a control circuit 1 and an interface circuit 2. As will be described later, the interface circuit 2 includes an ECU (electronic control unit) 3 of an electronic control unit.
Is connected. The control circuit 1 is composed of a microcomputer and has a built-in display. As the control circuit 1, for example, a notebook personal computer can be used. However, a schematic configuration of the control circuit 1 is shown in FIG. 2 for ease of explanation. That is, in the control circuit 1, a CPU (central processing unit) 11, a RAM (random access memory) 12 and a ROM (read only memory) 13 are connected to an internal bus 14, and the internal bus 14 is a chip for timing control. It is connected to the external bus 16 via the set 15. A hard disk drive 17 and a display control circuit 18 are connected to the external bus 16, and the display control circuit 18 is a CP.
The display control of the display 19 is performed according to the instruction from U11. A keyboard 20 is connected to the internal bus 14 via an operation control circuit 20a. The keyboard 20 has function keys, an enter key,
In addition to the arrow keys and ESC (escape) key, at least alphabetic character keys and ten keys are provided.

The interface circuit 2 is basically for relaying the measurement data (actual data) supplied from the ECU 3 to the control circuit 1 based on a command from the control circuit 1, the monitor circuit 4 and the analog circuit. 5 and a bus connection circuit 6. In the monitor circuit 4, as shown in FIG. 3, a CPU 21, a ROM 22, a RAM 23, an input / output circuit 24, and a DP (dual port) -RAM 25.
Are connected by a common bus. Input / output circuit 24
Has a port for serial communication conforming to the standard such as RS-232C, to which not only the ECU 3 but also the temperature measuring unit 7 is connected. The CPU 21 controls the operation in the monitor circuit 4, and operates according to a program stored in the ROM 22 in advance. RAM23 is this C
It stores data necessary for the control operation of the PU 21, for example, the connection state of the port currently used for serial communication. The DP-RAM 25 has two ports for input and output, and data supplied from the ECU 3 or the control circuit 1
It is for temporarily storing the command supplied from. Further, the DP-RAM 25 is connected to the bus connection circuit 6, and this connection line includes an interrupt request line as well as a data line.

In the analog circuit 5, as shown in FIG. 3, similarly to the monitor circuit 4, the CPU 31 and the ROM 3 are provided.
2, RAM 33, input / output circuit 34 and DP-RAM 35
Are connected by a common bus. However, the input / output circuit 34 includes an A / D converter, a D / A converter, and a pulse measuring device (both not shown). These are connected to an external voltage output type output device such as a voltage output type sensor or a pen recorder (both not shown) via an analog signal port.

The bus connection circuit 6 is the DP-R of the monitor circuit 4.
The input / output of the AM 25 and the DP-RAM 35 of the analog circuit 5 is mechanically and electrically connected to the external bus 16 of the control circuit 1. The ECU 3 connected to the data analysis device having such a configuration has a CPU 5 as shown in FIG.
1, a ROM 52, a RAM 53, a serial communication input / output circuit 54, a sensor input interface circuit 55, and an actuator drive circuit 56, which are connected to each other by a common bus. A plurality of sensors are connected to the sensor input interface circuit 55, and an actuator such as an injector is connected to the drive circuit 56. As the sensor, an oxygen concentration sensor that generates an output voltage according to the oxygen concentration in the exhaust gas in the exhaust pipe of the internal combustion engine, an intake pipe internal pressure sensor that generates a voltage according to the absolute pressure in the intake pipe of the internal combustion engine, the internal combustion engine There are various sensors such as a crank angle sensor that generates a pulse signal according to the number of revolutions of the crankshaft, a cooling water temperature sensor that detects the temperature of the cooling water temperature of the internal combustion engine, and the like.

The CPU 51 of the ECU 3 operates according to a program stored in advance in the ROM 52, reads the output values of the plurality of sensors via the sensor input interface circuit 55 and stores them in the RAM 53, and the actuators in accordance with the output values of the sensors. To generate a signal for driving the drive circuit and supply it to the drive circuit 56. For example, when driving the injector, the basic fuel injection amount is calculated from the absolute intake pipe internal pressure based on the output value of the intake pipe internal pressure sensor and the engine speed obtained from the output value of the crank angle sensor. The fuel injection amount is calculated by correcting the amount with the air-fuel ratio information obtained from the output value of the oxygen concentration sensor, the engine temperature information obtained from the cooling water temperature sensor, etc., and the injector is driven according to the fuel injection amount. As described above, the ECU 3 sequentially obtains values read by various sensors, intermediate values such as the basic fuel injection amount, and drive values such as the fuel injection amount with the passage of time. Each value is written as actual data in a predetermined address of the RAM 53 and updated. The data analysis device reads each data in the RAM 53 and analyzes the data. Therefore, during data analysis, the serial communication port of the serial communication input / output circuit 54 of the ECU 3 is connected to the serial communication port of the input / output circuit 24 of the monitor circuit 4.

The operation when the power of the data analysis device is turned on while the ECU 3 is connected to the data analysis device will be described. Of course, it is assumed that the ECU 3 is mounted on a vehicle and is in control operation. As shown in FIG. 5, the CPU 11 of the control circuit 1 first causes the display control circuit 18 to display a monitor image (step S).
1). FIG. 6 shows a monitor image, and each of the 16 frames is a channel window for displaying the parameter value obtained by the ECU 3. FIG. 7 specifically shows the contents of each display area in the channel window. Figure 7
In the above, "Ch No." is displayed slightly to the left of the channel window, and is a channel number set by the user as to where to assign the parameter value to be displayed. The channel numbers in the channel window are, for example, up to 48 channels, but the number of channels simultaneously displayed on the screen is 16 kinds of parameters, that is, 16 channels. "Label name" is a name indicating a parameter for displaying a value. For example, if the label name is "NE", engine speed, if "TA", engine intake temperature, "PBA"
If so, it means "absolute pressure in intake pipe". The “monitor display value” is a hexadecimal representation of the parameter displayed by the label name, and the “hex” next to it is a hexadecimal representation. “Physical value display” is a decimal number display that shows the parameter value displayed by the label name in units,
The next "physical value unit" is the unit. For example, the physical value unit of the engine speed is rpm, and the physical value unit of the intake pipe absolute pressure is mmHg.

In the monitor screen shown in FIG. 6, the display intermittently arranged in the lower part indicates ten function keys f.multidot.1 to f.multidot.10 provided on the keyboard 20 of the control circuit 1.
It is a guide display (not shown). "Settings" on the left side of the screen
Corresponds to the function key f. 1 and then to the right corresponds to the function key numbers in the display order. CPU
Reference numeral 11 determines whether or not the function key f · 9 corresponding to “environment” is operated in the display state of the monitor image (step S2). When the function key f-9 is operated, the environment setting mode is entered, and the display control circuit 18 displays the selected image of the RAM address file in a window on the monitor image of the display 16 (step S3). The RAM address file is a file that differs depending on the ECU or the vehicle on which it is mounted. As shown in FIG. 8, a label name for each parameter, a description of the label name,
Address of the internal RAM 53 of the ECU 3, data size W
This is a file in which / B and LSB codes are recorded. There is a RAM address file corresponding to each ECU 3 connected to the data analysis device. A plurality of RAM address file names registered in advance are continuously displayed on the display screen as windows, and one of the plurality of RAM address file names is an arrow provided on the keyboard 20 of the control circuit 1. It is highlighted by operating the cursor with the keys. After the desired RAM address file name is selected, the selection is determined by operating the enter key. The CPU 11 executes R after executing step S3.
It is determined whether or not the AM address file name has been selected and determined (step S4). When the RAM address file name of 1 is determined, the RAM address file name is read (step S5), and the display of the selected image of the RAM address file is terminated (step S6).

The data size W / B in the RAM address file indicates whether the data is word data (2-byte data) or 1-byte data. L
The SB code is a code for specifying the LSB file. The LSB file has a file structure as shown in FIG. That is, the part consisting of the code number which is the LSB code, the label name, the physical quantity unit, the formula number, the data length, the physical conversion parameters f0, f1 ... Is the LSB data corresponding to one measurement parameter, and a plurality of LSB files are included in the LSB file. The LSB data is continuously formed in the order of code numbers. The equation number is an equation for calculating a physical value from the actual value of the measurement parameter, and the physical conversion parameters f0, f1 ... Are coefficients used in the equation.

After executing step S6, the CPU 11 of the control circuit 1 returns to step S2. If the function key f.9 has not been operated in step S2, it is determined whether or not the function key f.1 corresponding to "setting" has been operated (step S7). When the function key f-1 is operated, the channel setting operation is performed (step S8). That is, in the channel setting, one frame of a plurality of channel display frames shown on the screen of the display 19 as a monitor image is made into a thick line frame, which becomes the current cursor position and is operated by operating the arrow keys. The cursor position is movable. When you move the cursor to the desired channel display frame with the arrow keys and then operate the enter key, the label names contained in the selected RAM address file are continuously displayed in the window, and the desired label name is moved with the arrow keys. After moving the position, select and confirm by operating the Enter key. By doing so, the correspondence between the channel number and the parameter to be measured is determined, and the reception channel storage area showing the correspondence is formed in the RAM 12. This channel setting operation can be repeated for any number of channels. By performing the channel setting operation in this manner, for example, a reception channel storage area as shown in FIG. 10 is formed.

Each time the channel setting operation is performed, the CPU 11 determines whether or not the ESC key has been operated (step S9). If the ESC key is not operated,
Further, step S8 is repeated to perform the channel setting operation. On the other hand, when the ESC key is operated, the control circuit 1 sets the correspondence relationship between each channel number stored in the channel storage area and the address of the RAM in the ECU 3 to D.
The data is written in the P-RAM 25 (step S10). DP-
In the RAM 25, for example, a data storage area is formed as shown in FIG. When the CPU 11 of the control circuit 1 finishes writing the correspondence in the DP-RAM 25, it issues an interrupt signal indicating a start command for starting the data communication (step S11). This interrupt signal is DP
-Written as data in the RAM 25.

On the other hand, the CPU 21 of the monitor circuit 4 is shown in FIG.
2, the DP-RAM 25 has a predetermined timing.
It is determined whether or not the interrupt signal of the start command is written therein (step S51). When the interrupt signal of the start command is written, the CPU 21 causes the monitor circuit 4 and the EC to operate.
Start serial communication with U3. That is, CPU
21 sets the channel number n to 1 (step S5
2) From the data table of DP-RAM 25
The address corresponding to the channel n-ch is read (step S53), and the serial signal of the data request for the read address is transmitted via the input / output circuit 24 (step S54).

When a serial signal is supplied from the monitor circuit 4 to the serial communication input / output circuit 54, the CPU 51 of the ECU 3 reads the address indicated by the serial signal and places it in the RAM 53 at the storage location designated by the read address. The stored data value is read and supplied to the serial communication input / output circuit 54. As described above, the value stored in the storage location designated by the address is the value detected by the sensor or the calculated value such as the fuel injection amount.
The serial communication input / output circuit 54 transmits as a serial signal indicating the data value.

The CPU 21 of the monitor circuit 4 executes step S
After executing 54, the serial communication input / output circuit 54 of the ECU 3
Determine whether the serial signal from the
(Step S55). If the serial signal is supplied
Read the value indicated by the serial signal
At the memory location corresponding to the channel number n-ch of M25
Write (step S56). The CPU 21
Add 1 to the channel number n (step S57), and
New channel number n is maximum channel number n
_maxDetermine if greater than (eg, 48)
(Step S58). n ≦ n_maxIf step S
Return to 53 and perform the above operation for the next channel number.
repeat. n> n_maxIf so, return to step S52
Repeat the above operation for the first channel 1-ch
You.

By performing such a serial communication operation, the DP-RAM 25 has a RAM for each channel.
The data values (hexadecimal data) read from 53 are written in the reading order. In addition, DP-RAM2
The write position of 5 is moved up for each channel by a counter (not shown), and when the final writable storage position is reached, the counter is reset so that the next write position returns to the first storage position. There is.

When such serial communication operation is started, the CPU 21 of the monitor circuit 4 generates an interrupt signal at a predetermined timing (for example, every 100 msec). Since this interrupt signal is written in a predetermined storage position of the DP-RAM 25, it is transmitted to the CPU 11 of the control circuit 1. Therefore, as shown in FIG. 13, the CPU 11 causes the function key f.
It is determined whether 6 has been operated (step S21).
When the function key f.6 is operated, the data storage mode is entered, and the time data at the time when the operation of the function key f.6 is detected is stored in the control circuit 1 itself from a time counter (not shown). Read and write in the header section of the received data storage area (step S2
2). This time data indicates the data recording start time. C
The PU 11 reads the measurement data of each channel of the DP-RAM 25 in response to the interrupt signal at a predetermined timing (step S23), and writes the read measurement data to the storage position of the reception data storage area of the RAM 12 in association with the channel. (Step S24), the data counter provided at the head of the storage position of the written reception data storage area is incremented by 1 (step S25).
Since this data reading operation is performed via the external bus 16, it is extremely faster than the data transmission rate of serial communication. Therefore, one data of all channels already written in the DP-RAM 25 is read and the received data is stored. Written in the area. The data counter indicates the number of read data common to all channels. C in DP-RAM25
The storage position of the data read by the PU 11 is marked for each channel by a counter (not shown) so that new data can be written. The reception data storage area is, for example, as shown in FIG.

When the CPU 11 finishes writing the data in the received data storage area, it determines whether or not the function key f.7 corresponding to "stop" has been operated (step S26). If the function key f · 7 is not operated, the CPU 21 of the next monitor circuit 4 waits for the generation of an interrupt signal. On the other hand, if the function key f · 7 is operated, an interrupt signal indicating a stop command for stopping the data communication is issued (step S27). Since the capacity of the received data storage area of the RAM 12 is limited, an interrupt signal indicating a stop command is generated even when the final storage position is reached.

The interrupt signal indicating this stop command is DP-
The data is written in the RAM 25 as data. Therefore, as shown in FIG. 15, the CPU 21 of the monitor circuit 4 determines whether or not the interrupt signal of the stop command is written in the DP-RAM 25 at a predetermined timing (step S6).
1). If a stop command interrupt is written, CP
U21 controls the input / output circuit 24 to monitor the monitor circuit 4 and the EC.
Stop serial communication with U3 (step S6)
2).

The CPU 11 of the control circuit 1 executes step S27.
After executing, the function key f corresponding to "Save"
.It is determined whether or not 8 is operated (step S2
8). When the function key f · 8 is operated, the contents of the received data storage area of the RAM 12 are stored in the hard disk drive 17 as a data file (step S29). At the time of this storage, the file name is given by the user. If the function key f · 8 is not operated, the contents of the reception data storage area of the RAM 12 are maintained as they are.

Measurement from the ECU by serial communication
I'm fetching data, but it's not limited to this.
Obviously, parallel communication is also acceptable. Control times
The CPU 11 of the path 1 is a back-up of the serial communication operation described above.
Screen display operation is performed as ground processing. This screen chart
In the operation shown, as shown in FIG.
The latest measurement data of each channel from the data table of 5
(Hexadecimal data) is read and shown in FIG.
Write in the latest data storage area as shown for each channel.
Imprint (step S31), set channel number m to 1
(Step S32), corresponding to the m-th channel m-ch
The LSB code is stored in the channel storage area of RAM12
Read from (step S33), the LSB code
Read the contents of the LSB file specified by
(Step S34). Physical quantity unit, formula from LSB file
Data such as number, data length, physical conversion parameters
Since the conversion formula specified by the formula number is read from the ROM 13
Read the physical conversion parameters and read them
Calculate the physical value by applying the latest m-ch data
(Step S35). CPU11 is the result of this calculation
The result data is stored in the RAM 12 as shown in FIG.
Write in the memory area corresponding to the m-th channel m-ch
(Step S36), add 1 to the channel number m
(Step S37), the new channel number m is the highest
Large channel number n_maxDetermine if greater than
(Step S38). m ≦ n_maxIf step S
Return to 32 and perform the above operation for the next channel number.
repeat. m> n _maxIn the case of, the display control circuit 18
Then, a display command is generated (step S39).

This display command is issued according to the latest data storage area, the result data storage area, and the physical quantity unit of the LSB file. The display control circuit 18 has a display 19
On the monitor video screen displayed on the screen, the latest data for each channel obtained from the latest data storage area is displayed in the monitor display range shown in FIG. The physical value of the calculation result for each channel is displayed in the physical value display area shown in FIG. 7 in the display window of the corresponding channel, and the physical quantity unit of the LSB file for each channel is shown in FIG. 7 in the display window of the corresponding channel. It is displayed in the indicated physical value unit display area.

It should be noted that instead of displaying physical values numerically,
On the monitor video screen, it is also possible to display a graph as shown in FIG. 19 by operating the function key f · 3 corresponding to “graph”. The CPU 11 of the control circuit 1 uses the function key f corresponding to "end".
-It is determined whether or not 10 has been operated (step S3
0). When the function key f · 10 is operated, this routine is finished. As described above, since the data of a plurality of channels are acquired from the ECU 3 and stored in the reception data storage area of the RAM 12 or the hard disk drive 17, the operation of analyzing and displaying these data is started.

The operation of analyzing and displaying the measured actual data on the display 19 will be described. Control circuit 1
In the analysis display operation, the CPU 11 first instructs the display control circuit 18 to display the time chart basic image as shown in FIG. 20 (step S81). The time chart basic image is predetermined as data in the display control circuit 18, and the time chart basic image is not analyzed and displayed but only a pull-down menu is displayed at the upper part. Then, a data file having the measurement data to be displayed is determined (step S8).
2). This is done by reading the selection result because the user selects a file name from the pull-down menu on the screen by key operation. When the data file is determined, the data file designated by the file name is read from the hard disk drive 17 (step S83). Then, from among the label names included in the read data file, the label name relating to the measurement data to be displayed is selected and determined (step S84).
This is also done by reading the selection result because the user selects the label name from the pull-down menu on the screen by key operation. Alternatively, the measurement parameters assigned to each channel included in the header of the read data file, that is, the label name, is read out and displayed in a window on the screen, and the key operation is performed from the displayed multiple label names. Can also be selected. CP
By designating the label name, U11 can know the channel number corresponding to the label name from the header portion of the data file. The user may select the channel number instead of the label name.

After the execution of step S84, the CPU 11 reads the recording start time, the final data counter value and the sampling period included in the header part of the read data file (step S85), and depending on the final data counter value or the display time unit. The display data cycle is calculated (step S86). That is, the final data counter value indicates the number of data of each channel of the read data file, and the number of dots that can be displayed in the horizontal direction of the display 19 is known in advance. Therefore, the final data counter value / dot number is calculated. The nearest integer less than or equal to the given value is the display data cycle that can display the data change of the read data file during the measurement period at one time. For example, if the final data counter value is 10000 and the number of horizontally displayed dots on the display 19 is 512, 10000/512 = 1
Since it is 9.53, the display data cycle is 19. In this case, one data is displayed for every 19 data.
Further, it is also possible to calculate the thinning cycle of the display data with the display time unit Div having a predetermined number of horizontal display dots on the display 19 as one scale. For example, if the number of horizontally displayed dots on the display 19 is 512, the predetermined number of dots in the display time unit Div is 16, and the sampling period is 5 msec, 32 Div can be displayed, and 1 Div is 5 msec × 16 dots = 80 ms.
Below ec, data thinning out at the time of display does not occur. If the 1 Div exceeds 80 msec, for example, 1 Div
If you want to display in / 100msec, 100 in 1 Div
Since msec / 5msec = 20 data, 1Di
It is necessary to thin out 4 data per v. That is, 5
Data is thinned out at a ratio of 1 data.

Next, the CPU 11 sets the variable C to 1 (step S87), reads the measurement data of each channel corresponding to the data counter value C of the read data file (step S88), and then the data counter value C Is multiplied by the sampling period, and the recording start time is added to it to obtain the calculation result as time data (step S
89). The data read in step S88 is only the channel corresponding to the label name determined in step S84. The read measurement data and the calculated time data are supplied to the display control circuit 18 (step S9).
0). Then, the display data cycle calculated in step S86 is added to the variable C to make it a new variable C (step S91), and it is determined whether or not the variable C exceeds the final data counter value (step S92). If the variable C does not exceed the final data counter value, step S8
Returning to step 8, the above operation is repeated. If the variable C exceeds the final data counter value, the measured data to be displayed has been read from the data file. Display control circuit 1
8 displays a time chart image on the screen of the display 19, for example, as shown in FIG. 21, based on the supplied measurement data and time data. That is, every time the measurement data and the time data are supplied, the coordinate points are set as the time data in the X-axis direction and the measurement data in the Y-axis direction, and the coordinate points are connected by a straight line for each same parameter. The time data is displayed along the X-axis as scale values for 7 points at predetermined equal intervals. The unit in the Y-axis direction corresponds to the unit of any one parameter, and it can be arbitrarily switched. In the case of FIG. 21, the engine speed is selected as can be seen from the fact that “NE” is surrounded by a frame in the “Ch” column at the top of the time chart image.

While the time chart image is being displayed, the data being displayed as a graph and the measurement data of another data file can be displayed as a comparative graph. Next, the comparison graph display operation will be described. CPU11
In the comparative graph display operation, as shown in FIGS. 22 to 24, it is determined whether or not a comparative graph display command is issued while the time chart image is displayed (step S10).
1). When the user operates the keyboard 20, for example,
If "Graph" is selected from the pull-down menu on the screen described above and "Comparison graph" is selected from the window opened thereby, it is determined that the comparison graph display command has been issued. If a comparison graph display command is issued,
Time chart for comparison Display basic video display Control circuit 1
8 (step S102). The comparison time chart basic image is predetermined as data in the display control circuit 18, and like the normal time chart basic image, the comparison time chart basic image is not analyzed and displayed, and a pull-down menu is provided at the top. It is only displayed. Then, the data file having the measurement data to be displayed in the comparative graph is determined (step S10).
3). This is performed by reading the selection result, because the user selects a file name from the pull-down menu on the screen by key operation as in step S82. Here, in order to facilitate the description, step S82.
The data file determined in step S102 is the comparison source data file, and the data file determined in step S102 is the comparison destination data file.

Next, from among the label names included in the comparison source data file, the label name relating to the measurement data to be displayed as the comparison data is selected and determined (step S104), and the label name included in the comparison destination data file is selected. The label name relating to the measurement data to be displayed as the comparison data is selected and determined (step S105). These steps S
Steps 104 and S105 are the same as step S84. In addition, when the user operates the space key, step S10 is performed.
4 and S105 may be switched alternately.

After executing the step S105, the CPU 11
The recording start time, the final data counter value, and the sampling cycle included in the header parts of the comparison source and comparison destination data files are read (step S106), and the display data cycle is calculated according to the final data counter value or the display time unit (step S106). S107). The operation of step S107 is similar to that of step S86.

Next, the CPU 11 sets the variable C to 1 (step S108), reads the measurement data of each channel corresponding to the data counter value C of the comparison source and comparison destination data files (step S109), and reads the data. The counter value C is multiplied by the sampling period, the recording start time is added to the value, and the calculation result is used as time data (step S110). The data read in step S109 is only the channel corresponding to the label name determined in step S105. The read measurement data and the calculated time data are supplied to the display control circuit 18 (step S111). Then, the display data cycle calculated in step S107 is added to the variable C to make it a new variable C (step S112), and it is determined whether or not the variable C exceeds a predetermined data counter value (step S113). Here, the predetermined data counter value is determined according to the number of horizontally displayed dots on the display 19, and does not exceed the final data counter value. Since the final data counter value, that is, the number of data may differ between the comparison source data file and the comparison target data file, if the final data counter value is used in this step S113, the final data counter value of the one with the larger number of data is used. This is the final data counter value of the data file. If the variable C does not exceed the predetermined data counter value, step S1
Returning to 09, the above operation is repeated. If the variable C exceeds the predetermined data counter value, it means that the measurement data to be displayed is read from the data file. The display control circuit 18 displays, on the screen of the display 19 based on the supplied measurement data and time data, a time chart image having a comparison graph composed of the measurement data of both the comparison source and comparison destination data files, as shown in FIG. 25, for example. To display. In FIG. 25, "C" at the top of the time chart image is displayed.
In the “h” column, the frame label names “NE” and “PA” are the engine speed and atmospheric pressure selected and determined from the comparison source data file, and underlined “NE” and “KO”, respectively.
2 ”is the engine speed and the oxygen concentration in the exhaust gas selected and determined from the comparison target data file.

After executing the step S113, the CPU 11
It is determined whether or not each arrow key of the keyboard 20 has been operated (steps S115 to S118). If the arrow key "←" is operated, the display graph for the comparison target data file is moved to the left by one dot as a whole (step S119), and if the arrow key "→" is operated,
The display graph of the comparison target data file is moved to the right by one dot as a whole (step S120). If the arrow key "↓" is operated, the display graph of the comparison target data file is moved to the left by 16 dots as a whole (step S121), and if the arrow key "↑" is operated,
The display graph for the comparison target data file is moved to the right by 16 dots as a whole (step S122).
Here, it is assumed that 16 dots correspond to 1 Div described above. In response to these movement commands, the display control circuit 18 moves the display position of the display graph of the comparison target data file on the screen of the display 19 as a whole dot.
So-called scrolling is performed. As shown in FIG. 26A, when there is a time difference between the peak part of the graph A obtained from the data of the comparison target data file and the graph B obtained from the data of the comparison source data file, the peak part of the graph B is As shown in FIG. 26 (b), by moving to the peak portion of graph A, the waveform change of the peak portion can be compared.

After issuing the movement command in this way, the CPU 11 reads the measured data corresponding to the display data cycle calculated in step S112 for the moving dots from the comparison target data file and supplies it to the display control circuit 18 (step S123). ). The data read here is step S1.
Only the measurement data relating to the label name selected and decided in 05. The display control circuit 18 fills the continuation part on the right or left of the graph display in which dots are moved on the screen of the display 19 according to the supplied measurement data to make a continuous graph display. If there is no measurement data to be read in the comparison target data file, that is, if there is no measurement data to be displayed, step S123 is ignored.

After executing S123, or if NO in step S118, the CPU 11 determines whether or not there is a division change (step S125). If "division setting" is selected from the pull-down menu on the screen described above by a key operation of the user's keyboard 20, and if a numerical value is input to the window opened by that, the division is changed. And the input numerical value is read (step S12).
6). The display data cycle is calculated according to the display time unit in which the input numerical value is divided by 1 Div (step S127), and the process proceeds to step S108. As a result, on the screen of the display 19, a comparison time chart image having a comparison graph of the measurement data of both the comparison source and comparison destination data files is displayed by the new display time unit Div. As shown in FIG. 27A in the comparison time chart image, when the comparison graph display is displayed, if the display time unit Div is set to a small time, the comparison graph display is displayed in the X-axis direction in FIG. 27B. As shown in FIG. 27C, when the display time unit Div is set to be large, the comparison graph display is reduced in the X-axis direction as shown in FIG. 27C. Therefore, the user can make a comparative graph display in which data analysis is easy by appropriately setting the time of the display time unit Div. It should be noted that, when the process proceeds from step S127 to step S108, the comparison graph is displayed from the first data temporally from left to right on the screen of the display 19, but step S127
In case of shifting from step S108 to step S108, step S1
At 08, the variable C may be set so as to be equal to the data count value for the data displayed on the leftmost side until then. Alternatively, the variable C may be set so as to be equal to the data count value for the data designated on the screen by the user's key operation.

When it is determined in step S125 that the division is not changed, it is determined whether or not the comparison graph display is completed (step S128). When it is determined that the comparison graph display has ended because the user has performed a predetermined key operation, the comparison graph display ends and the normal time chart of FIG. 20 is returned to. On the other hand, if it is not determined that the display of the comparative graph has ended, the process returns to step S115.

In the above-described embodiment, the electronic fuel injection device is used as the electronic control device, but the present invention is not limited to this. The present invention can be applied to an internal combustion engine to an electronic control device such as an ignition timing control device, an air-fuel ratio control device, and a throttle opening control device, and can also be applied to other electronic control devices.

[0040]

In the data analysis device of the electronic control device according to the present invention, a plurality of data files, each of which is created as a data group showing the time change of the actual data value of at least one operation parameter of the electronic control device, are stored. Each data of the at least two data files is read from the stored storage means, and the graph by the data group included in one of the data files and the graph by the data group included in the other data file are displayed on the display device in an overlapping manner. It is possible to easily perform data analysis by comparing graphs of data groups for each operation parameter included in different data files.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing a schematic configuration of a control circuit.

FIG. 3 is a block diagram showing a configuration of an interface circuit.

FIG. 4 is a block diagram showing a configuration of an ECU.

FIG. 5 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 6 is an example of a monitor image display.

FIG. 7 is a diagram partially showing details of the monitor image display of FIG.

FIG. 8 is a diagram showing a structure of a RAM address file.

FIG. 9 is a diagram showing a structure of an LSB file.

FIG. 10 is a diagram showing a data table of a reception channel storage area.

FIG. 11 is a diagram showing a data table of a data storage area.

FIG. 12 is a flowchart showing the operation of the CPU of the monitor circuit.

FIG. 13 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 14 is a diagram showing a data table of a received data recording area.

FIG. 15 is a flowchart showing the operation of the CPU of the monitor circuit.

FIG. 16 is a flowchart showing the operation of the CPU of the control circuit.

FIG. 17 is a diagram showing a data table of a latest data storage area.

FIG. 18 is a diagram showing a data table of a result data storage area.

FIG. 19 is a diagram showing a graph display example.

FIG. 20 is a flowchart showing a time chart display operation of the CPU of the control circuit.

FIG. 21 is a diagram showing a time chart video display example.

FIG. 22 is a flowchart showing a comparison graph display operation.

FIG. 23 is a flowchart showing a sequel to the comparison graph display operation of FIG. 22;

FIG. 24 is a flowchart showing a sequel to the comparison graph display operation of FIG. 23;

FIG. 25 is a diagram showing a display example of a comparison graph.

FIG. 26 is a diagram showing an example of scroll display.

FIG. 27 is a diagram showing an enlarged and reduced display example.

[Explanation of symbols for main parts]

 1 Control circuit 2 Interface circuit 3 ECU 4 Monitor circuit 5 Analog circuit 6 Bus connection circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tadashi Umeda 1-4-1 Chuo, Wako-shi, Saitama Honda R & D Co., Ltd. (72) Inventor Katsushi Watanabe 1-4-1 Chuo, Wako-shi, Saitama Stock Inside Honda R & D Co., Ltd.

Claims (6)

[Claims] 1. A data analysis device for displaying data on a display device based on actual data of operating parameters obtained during control in an electronic control device, each of which is provided with actual data of at least one operating parameter of the electronic control device. A data file storage unit that stores a plurality of data files created as a data group indicating a time change of the data value, a reading unit that reads each data of at least two data files from the data file storage unit, and a read unit. Display control means for superposing and displaying on the display a graph by a data group included in one of the read at least two data files and a graph by a data group included in the other data file. A data analysis device for an electronic control device characterized by the above. 2. The data analysis device for an electronic control device according to claim 1, wherein the display control means displays each graph to be superimposed and displayed on the display unit in the same time unit. 3. The data analysis of the electronic control apparatus according to claim 1, wherein the reading means reads a data group designated by an operation parameter from the at least two data files and supplies the data group to the display control means. apparatus. 4. The electronic device according to claim 1, wherein the display control means controls the entire graph display by the data group included in the other data file in the time axis direction in response to a movement command. Data analysis device for control device. 5. The display control means thins out the data of each data group and displays it in a graph on the display unit, and changes the number of thinned out graphs in accordance with the input numerical value indicating the time unit of the graph time axis. The data analysis device for an electronic control device according to claim 1, wherein: 6. The data analysis device for an electronic control unit according to claim 1, wherein the storage means is a semiconductor memory or a hard disk drive.