JP2588657B2 - Inspection program automatic creation method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for automatically creating an inspection program which can easily create and change an inspection program for a product.

[0002]

2. Description of the Related Art In the industry, automation of quality inspection of products to be produced has been promoted.

In designing a QA system used for this quality inspection (hereinafter referred to as QA), a number of inspection points are set from drawings showing the shape of products and the like, and measuring devices, inspection devices, etc. Data is collected using.

[0004] The large number of measurement data are analyzed, and an optimum inspection point is determined from the analysis result, and a threshold value for judging whether the product is good or defective at the optimum inspection point is determined. Q based on the judgment data
Create A plan.

A QA system is designed in accordance with the QA plan, and software and hardware are designed. When the assembling is completed, the system designer of the inspection plan, and the design of the software and hardware are performed. A dedicated QA system is manufactured for each product.

[0006]

However, in the above-described method of manufacturing a QA system according to the prior art, a software engineer is required consistently from the determination of an inspection plan to final debugging, and the software engineer needs a long time. Must be restrained.

Further, if a change in the quality control plan or the like occurs after the completion of the QA system, the operator cannot cope with the change. Therefore, the software engineer must perform the work of designing and debugging again. There is a problem that a great burden is imposed on the engineer.

The present invention has been made to solve such a conventional problem, and an operator performs a process from determination of an inspection plan to creation and debugging of an inspection program in an interactive manner with a display via input means. Accordingly, an object of the present invention is to provide an inspection program automatic creation method capable of reducing the number of software engineers required for software development and debugging of a QA program and shortening the production period of a QA system.

[0009]

In order to achieve the above object, the present invention provides an inspection apparatus for inspecting a product to be inspected.
Connected to the computer via the interface
How to create an inspection program to inspect products
Te, the dialogue method between the computer, the input means
Setting the measurement conditions of the inspection device via the
Activate the inspection device based on the
A plurality of experimental data are measured and collected , and a plurality of experimental data obtained in the experimental mode are displayed in a graph form on a display means for analysis.
A step of analyzing modes, is displayed in the graphical form
Inspection via input means based on multiple experimental data obtained
In a determination value creation mode for setting a determination value for the inspection, and creating an inspection program based on the determination value
And a step of an inspection program automatic creation mode .

[0010]

In the inspection program automatic creation method according to the present invention, an interactive method with a computer is performed through input means.
To set the measurement conditions of the inspection device, and based on the measurement conditions,
To operate the inspection device, and a plurality of experimental data
Means for displaying the experimental data after measuring and collecting the data
In the form of a graph and set the judgment value for inspection.
You. Then, an inspection program is automatically created based on the determination value .

Therefore, the inspection program can be easily created by the operator.

[0012]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of an automatic inspection program creation method according to the present invention.

FIG. 1 is a diagram for explaining a configuration of a torque measuring system for inspecting a rotational torque of an outboard outer, which is a component of a drive shaft of a vehicle.

In the drawing, reference numeral 10 is a torque measuring system, reference numeral 12 is an outboard outer, and reference numeral 14 is
Denotes a support for the outboard outer 12.

The torque measuring system 10 includes a detecting unit 16
The detection unit 16 includes a motor 20 as a drive source for rotating the outboard outer 12. A pulley 24 and a powder brake 25 as a torque limiter are provided on a rotation shaft 22 of the motor 20. Axle-mounted. A belt 26 is wound around the pulley 24, and the torque of the motor 20 is transmitted to the pulley 28.

The pulley 28 is mounted on a shaft 30, and the shaft 3
A rotation angle detection encoder 32 is axially attached to one end of the shaft 0, and a torque meter 34 is axially attached to the other side of the shaft 30, and a bit 36 is engaged. The bit 36 is fitted to the outboard outer 12.

An unillustrated inclination drive means for inclining the work inclination angle detection encoder 37 and the detection unit 16 is attached to a mounting table (not shown).

FIG. 2 is a block diagram showing functions of the QA control unit 18. The QA control unit 18 includes a strain amplifier 38 that amplifies the output of the torque meter 34 and an A / D conversion circuit 40 that converts the output of the strain amplifier 38 into a digital value.
And a computer 44 for reading a digital value output from the A / D conversion circuit 40 via a data bus 42.

The QA control unit 18 includes the rotation angle detection encoder 3
A counter circuit (hereinafter, referred to as a CNT circuit) 46 to which the rotation angle signal output from the encoder 2 and the tilt angle signal output from the work tilt angle detection encoder 37 are input, and is output from the computer 44 to tilt drive means (not shown). D / A conversion circuit 4 for converting the deviation information into an analog signal
8, interface circuit (hereinafter referred to as I / F) 52 between computer 44 and sequencer 50, pen recorder 5
I / F 56 with I / F 4, and I for communication with bar code reader 58
/ F60.

Further, the QA controller 18 controls the color CRT 6
2, a touch panel 63 provided on the screen of the color CRT 62, a hard disk 64 serving as a large-capacity storage means, a printer 66, and a keyboard 68 are connected. And a ROM 72 for temporarily storing an arithmetic program and the like.

With the torque measurement system 10 configured as described above, the outboard outer 12 is tilted to measure the rotational torque at each inclination angle, and the operation of setting the threshold value of the rotational torque from the measurement result is described. ,
This will be described with reference to FIGS.

FIG. 3 is a main flowchart showing an operation for automatically creating an inspection program for the outboard outer 12.

The automatic creation mode includes an experiment mode for collecting data of each part of the product (step S1), an analysis mode for analyzing these measurement data (step S2),
There is a judgment value creation mode for setting a judgment value based on the analysis result (step S3), and an inspection program automatic creation mode for automatically creating an inspection program from the set judgment value (step S4).

FIG. 4 shows the experimental mode (step S) of FIG.
It is a flowchart which shows operation | movement of 1).

On the mode selection screen displayed on the color CRT 62 (see FIG. 8A), an experiment mode is selected (step S10). In this case, the color CRT 62
Since the touch panel 63 is provided on the top, the color C
Touch panel 63 on the text of the experiment displayed on RT62
The experiment mode is selected by touching.

The color CRT 62 is a mode selection screen on which setting of measurement conditions, setting of measurement method, execution of measurement, and the like are displayed (see FIG. 8B). When setting of measurement conditions is selected on this screen (step S11). , A / D conversion circuit 40,
This is a hardware measurement condition setting screen on which the D / A conversion circuit 48 and the CNT circuit 46 are displayed.

Here, for example, when the A / D conversion circuit 40 for reading the output of the strain amplifier 38 is selected, a screen for setting the measurement conditions of the A / D conversion circuit 40 is displayed as shown in FIG. For example, 0 to 200 as an input range, kg-cm ² as a unit, and a gradient torque value as a name are set.

Similarly, a D / A conversion circuit 48 for outputting a control signal to the powder brake 25, a CNT circuit 46 for detecting a rotation angle and an inclination angle, etc., I / F 52 and I / F
By setting the port allocation to the sequencer 50 of the 56 and the port allocation to the pen recorder 54 of the I / F 56, the setting of the hardware measurement conditions is completed (step S12).

The set hardware measurement conditions are stored in the hard disk 64 with a file name, for example, “outboard det” added thereto.

Next, the measurement method is set. That is, when the setting of the measurement method is selected on the screen of FIG. 8B (step S13), a measurement pattern selection screen is displayed, and a plurality of measurement patterns are displayed. From these measurement patterns, for example, a second measurement pattern including an item name, a sampling time, and a condition name is selected (FIG. 9).
(See (b)) (step S14), when the file name “outboard det” is selected on the next screen, the computer 44 reads out the data of “outboard det” stored in the hard disk 64 and stores it in the RAM 70, A measurement item selection screen is displayed on the color CRT 62.

On the measurement item selection screen, for example,
The user selects the tilt torque, the rotation encoder, and the tilt angle (see FIG. 10), and further sets the sampling time of the measurement item on the sampling time setting screen (FIG. 11a).
(See step S16), when a condition pattern, for example, "1. XX data is measured up to xx and xx time xx data is measured from xx" is selected on the condition pattern selection screen (FIG. 11B). ) (Step S17), the XX portion of the sentence is set on the next screen to complete the sentence (see FIG. 12A).

That is, the "rotation encoder" data is measured for "1. The" tilt angle "data is up to" 42 degrees "and for" 3 degrees "from" 42 degrees ". ".

The setting of the measuring method is completed by the above steps, and the set measuring conditions are stored in the hard disk 64 and the RAM 70 together with the measuring method (step S18). These settings are all made by touching the touch panel 63 as described above.

Next, when the execution of measurement is selected on the screen of FIG. 8B, a confirmation screen for the file name, the measurement conditions and the measurement method is displayed. After these confirmation screens, the measurement execution start screen (see FIG. 12B) ).

When the start is selected on the start screen, the computer 44 urges the tilt drive means (not shown) via the sequencer 50 to tilt the outboard outer 12 spirally from the vertical position to the horizontal position by 42 degrees in the horizontal direction. At the same time, the motor 20 is energized to rotate the outboard outer 12, and the rotational torque is measured by the torque meter 34 every 10 ms set in step S16 (step S19).

When the measurement is completed, the measurement data is stored in the hard disk 64 with the file name "outboard det" added thereto on the save screen, and the experiment mode ends (step S20).

The operation of analyzing the measurement data obtained in the above steps will be described. Prior to the analysis of the data, the measurement data is graphically displayed.

When analysis is selected on the screen shown in FIG. 8A (see FIG. 5) (step S30), an analysis screen is displayed (see FIG. 13A), and a graph display is selected on this analysis screen (step S31). ), And when the file name "outboard det" is selected on the next screen, the computer 4
4 reads out the measurement data of "outboard det" from the hard disk 64 and stores it in the RAM 70 (step S32).

Next, in order to represent the measured data in a graph, the horizontal and vertical axes of the graph are set (step S33). That is, the horizontal axis / vertical axis setting screen (FIG. 13)
In FIG. 14B, when the horizontal axis is selected, a horizontal axis setting screen is displayed (see FIG. 14A). From the items such as the tilt torque, the rotation encoder, and the tilt angle displayed on this screen, for example, the tilt angle is set. select.

Again, in the horizontal axis / vertical axis setting screen of FIG. 13B, the vertical axis is selected, and the vertical axis setting screen (FIG. 14) is selected.
(See (d)), the gradient torque is selected, and the determination is further selected, whereby a graph in which the horizontal axis is the tilt angle and the vertical axis is the tilt torque is displayed on the color CRT 62 (see FIG. 15). (Step S34).

The displayed graph data is stored in the hard disk 64 when Y is selected on the data save screen (step S35), and the graph display of the measured data in the analysis mode ends.

Next, the analysis and calculation operations in the analysis mode and the operations in the judgment value creation mode will be described.

In the screen shown in FIG. 13A, when a graph cut is selected (see FIG. 6) (step S4).
0), a file name selection screen is displayed, and when the file name “outboard det” is selected on this screen, the computer 44 reads data from the hard disk 64 and
It is stored in M70 and displayed on the color CRT 62 (see FIG. 16A) (step S41).

A window is displayed on the graph display screen, and an expansion / contraction switch for selecting expansion / contraction of the window, a direction selection switch for selecting the up / down / left / right direction (↑ ↓ ← →) of expansion / contraction of the window, and a window And a coarse / fine switch for selecting coarse / fine of the moving amount of the window are displayed at the same time. The cut-out portion of the graph is determined by making full use of the display for determining these windows (step S).
42), the cut-out portion is enlarged and displayed (FIG. 16).
(See (b)) (Step S43). In FIG. 16B in which the cut-out portion of the graph is enlarged and displayed, a cross cursor is displayed on the graph, and a moving direction switch for moving the cross cursor in the left and right direction (← →) on the graph. A coarse and fine switch indicating a movement pitch and an extraction switch for selecting an extraction mode are displayed, and values of a tilt torque, a tilt angle, and a rotation angle at a position indicated by a cross cursor are respectively displayed.

The extraction switch is selected to set an extraction mode (step S44). On the screen, menus of extraction modes such as maximum value, minimum value, single value, division and elapsed time are displayed. When the maximum value is selected from these menus (see FIG. 17A), “XX becomes XX” X from to xx
A sentence for determining the maximum value “xx” is displayed (see FIG. 17B).

This sentence is completed, for example, as “inclination torque from an inclination angle of 42 degrees to 42 degrees” (see FIG. 18) (step S45), and together with the maximum value selected in FIG. A sentence for obtaining the maximum value of the inclination torque at an inclination angle of 42 degrees is completed. A file name is added to the sentence and stored in the RAM 70.

By the same steps, a sentence for obtaining the minimum value of the inclination torque at an inclination angle of 42 degrees is completed (step S46), and a file name is added to this sentence and stored in the RAM 70. At this time, the color CRT
Numbers are displayed on the graph 62 in the order of extraction (FIG. 19).
(A)).

Next, when the division in FIG. 17A is selected, “XX is changed from XXX to XX,
Divide by × to find XX. Is displayed (see FIG. 19 (b)), and this sentence is divided, for example, from "42 degree max torque" into 600 pulses of the tilt angle of the encoder from 42 to 0 to obtain the tilt torque. Is obtained (see FIG. 20) (step S47), and 60 is set based on the maximum torque value at the inclination angle of 42 degrees.
An operation command sentence for calculating the inclination torque at each point divided by 0 pulse is stored in the RAM 70.

In the same procedure, an operation command sentence for obtaining the inclination torque at each point divided by 600 pulses based on the minimum torque value of the inclination angle of 42 degrees is completed (step S48) and stored in the RAM 70. Thus, the creation of the sentence of the operation instruction is completed.

Next, the arithmetic processing is performed according to the arithmetic instruction.

When the calculation mode displayed in FIG. 19A is selected (see FIG. 21A) (step S60) (see FIG. 7), a calculation menu is displayed, and a command to draw a straight line from this menu is displayed. Is selected (Fig. 21
(See (b)), a detailed menu for drawing a straight line is displayed. When "1. Connect with a straight line between division points" is selected from these menus (step S6).
1) A graph connecting the division points with a straight line is displayed, and the calculation menu is displayed again. When an instruction for finding an intersection is selected from this menu (see FIG. 22A) (step S62), the intersection is determined. The instruction sentence for finding, "XX finds the intersection of XX and XX,
X. Is displayed.

The sentence is completed, for example, as follows: "The intersection of the inclination angle of 30 degrees and the straight line A is determined, and the determined point is a maximum torque of 30 degrees." (See FIG. 22B) S63). Similarly, the maximum torque value at 20 degrees and 10 degrees and the minimum torque value at 30 degrees, 20 degrees and 10 degrees are obtained (step S64).

Next, when a difference is selected in the calculation menu displayed on the screen of FIG.
(Refer to (a)), an instruction sentence consisting of the requirement and the difference, "Take the difference between XX and XX and make it XX" is displayed (FIG. 23).
(Refer to (b)), 4 from the requirement displayed in the same screen
Select the 2nd max torque and the 42 min torque, and change the displayed command text to "42 max torque and 42 m
The difference between the in-torques is taken to give a torque width of 42 degrees. (See FIG. 24) (step S66). By the same method, the center torque which is the center value between the maximum value and the minimum value of the inclination torque at each work inclination angle, and the work inclination angles are 0 ° to 10 °, 10 ° to 20 °, and 20 ° to 30 °
Then, the average change rate of the rotational torque in degrees and 30 degrees to 42 degrees is obtained, and the determination value creation mode in step S3 ends (step S67).

In this case, the work inclination angle is 10 degrees, 20 degrees.
Degrees, 30 degrees, and 42 degrees, the maximum torque, the minimum torque, the center torque, the torque width and the work inclination angle are 0 to 10 degrees, 10 to 20 degrees, 20 to 30 degrees, and 30 degrees.
The average change rate of the rotation torque in degrees to 42 degrees is obtained as a quality judgment item of the assembled work.

Steps S10 to S67
In the RAM 70, the experiment method, the calculation method, and the judgment items and the judgment criteria obtained by the calculation are respectively stored in the RAM 70.
, These methods and determination criteria are arranged to form an automatic inspection program (step S
4).

As described above, according to the present embodiment,
By performing the experiment mode, the analysis mode, and the determination value creation mode, it is possible to easily obtain an automatic inspection program for determining whether the assembled state of the rotatable outboard outer 12 is good.

Further, when the automatic inspection program is changed, the operator can easily perform the change work by re-inputting on each screen.

Accordingly, the automatic inspection program can be created and changed by the operator without relying on the software engineer, so that the burden on the software engineer can be reduced and the program creation can be reduced. And the cost of manufacturing the automatic inspection device can be reduced.

The outboard outer inspection program consisting of the experiment mode, the analysis mode, and the judgment value creation mode can be used, for example, for automatic creation of a temperature inspection program for a die-cast to be heated by a slight change. Has a very broad versatility.

[0060]

According to the method for automatically creating an inspection program according to the present invention, an operator can easily create and change an inspection program without using a software engineer. It becomes possible to reduce.

Further, since the number of steps required for program creation and debugging can be reduced, the production period of the automatic inspection device can be shortened.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the overall configuration of a torque measurement system that implements an inspection program automatic creation method according to the present invention.

FIG. 2 is a block diagram showing functions of a QA control unit of the embodiment shown in FIG.

FIG. 3 is a main flowchart showing an operation of automatically creating an inspection program of the embodiment shown in FIG.

FIG. 4 is a flowchart showing an operation of automatically creating the inspection program of the embodiment shown in FIG.

FIG. 5 is a flowchart showing an operation of automatically creating the inspection program of the embodiment shown in FIG.

FIG. 6 is a flowchart showing an operation of automatically creating the inspection program of the embodiment shown in FIG.

FIG. 7 is a flowchart showing an operation of automatically creating the inspection program of the embodiment shown in FIG.

FIG. 8 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 9 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

10 is a diagram illustrating a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG.

FIG. 11 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 12 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 13 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 14 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 15 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 16 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 17 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 18 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

19 is a diagram illustrating a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG.

FIG. 20 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 21 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 22 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 23 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

FIG. 24 is a view for explaining a screen display of a color CRT for automatically creating the inspection program of the embodiment shown in FIG. 1;

[Description of Signs] 10 Torque measurement system 12 Outboard outer 16 Detector 18 QA controller 20 Motor 25 Powder brake 32 Rotation angle detection encoder 34 Torque meter 37 Workpiece inclination angle detection encoder 40 A / D conversion circuit 44 ... Computer 46 ... CNT circuit 48 ... D / A conversion circuit 62 ... Color CRT 63 ... Touch panel 64 ... Hard disk

Claims (1)

(57) [Claims] 1. An interface for an inspection apparatus for inspecting a product to be inspected.
Connected to the computer via the
A method of making a test program for inspecting, by interactively with the computer, through the input means
To set the measurement conditions of the inspection device, and based on the measurement conditions.
Operating the inspection device based on the
An experimental mode step of measuring and collecting the experimental data of the above , and analyzing the plurality of experimental data obtained in the experimental mode step in a graph format on a display means for analysis.
Based on the mode steps and the plurality of experimental data displayed in the graph format.
To set a judgment value for inspection via input means.
A step of a fixed value creation mode ; and an inspection for creating an inspection program based on the determination value.
A method for automatically creating an inspection program, comprising: steps of an automatic program creation mode .