JP2654658B2 - Selective assembly instruction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to assembling two or more types of parts supplied from different lines with each other, and using a machining accuracy rank displayed on each assembled part. The present invention relates to a selective assembling instruction device that is simultaneously displayed on a single CRT monitor and allows an assembling operator to see it and easily know the overall machining accuracy after assembling.

[Conventional technology]

When assembling a plurality of assembly parts whose processing accuracy ranks are indicated by characters (including signs and numbers), these processing accuracy ranks are imaged by a television camera or the like, displayed on a CRT monitor, and the assembly worker If it can be seen, the assembling worker can know the accuracy and the like after assembling, and can attach an adjusting member such as a spacer if necessary, and adjust the adjusting member to an optimal size for the component combination. Can be selected, which is extremely convenient for production management.

As a method using a television camera, as shown in FIG. 8, images captured by a plurality of television cameras 5a, 5b, and 5c are converted into video using an analog switch element or the like based on a synchronization signal 37 from a synchronization signal generator 33. A method of switching at high speed by a signal switch circuit 32 and displaying a synthesized image on a CRT monitor 34, and as shown in FIG. 9, an A / D (analog / digital) converter for converting a signal from the video signal switch circuit 32 There is a method in which the data is converted by 35 and stored in the frame memory 36.

[Problems to be solved by the invention]

When the captured images are combined on one screen by the above method, the following problem occurs.

(A) As shown in FIGS. 10 (a) to (f), the composition of the synthesized screens 34a, 34b, 34c, 34d, 34e, 34f is divided into two, three, four, six, etc. Minute, eight equal parts,..., And combinations thereof, and it is not possible to make detailed settings (screen arrangement) such that a necessary portion is displayed at an arbitrary position. In order to realize fine settings by the conventional technology, several tens to several hundreds of switch circuits are required, and extremely complicated adjustment is required.

(B) The size and character pitch of the characters on the synthesized and displayed CRT screen differ depending on the taken TV camera, making it difficult to see. Since the captured image and the display image are in a ratio of 1: 1, for example, as shown in FIG. 11, the characters representing the processing accuracy ranks displayed on the workpieces 1a, 1b, and 1c have the same size as the CRs.
It is displayed on the T monitor 34 and is hard to see.

(C) Further, in the prior art, it is necessary to simultaneously position a component to be imaged (hereinafter, abbreviated as a work) in front of each television camera and simultaneously image. This is not a problem when imaging different parts of the same work,
When imaging multiple (or multiple) different workpieces,
Since the timing at which each work is positioned in front of the television camera is different, a plurality of works cannot be imaged at the same time.

Generally, each type of work flows on the production line of the flow operation with a tact of several seconds to several minutes, and between each type of work, a delay of several seconds to several minutes and advancing are allowed. In other words, from a few seconds
It flows synchronously with an error of several minutes, preventing the entire line from stopping due to the delay of some workpieces. If each work is forcibly stopped for a certain period of time, all the lines are temporarily stopped, which causes a problem of a reduction in production efficiency.

According to the present invention, in the step of assembling a plurality of parts supplied from different lines, the machining accuracy rank displayed on each of the assembled parts can be displayed on one CRT monitor in the most visible state, and the assembling worker can be displayed. It is an object of the present invention to provide means for easily determining the processing accuracy rank.

[Means for solving the problem]

The selective assembling instruction apparatus of the present invention that achieves this object is as follows.

A plurality of image pickup means for respectively picking up a plurality of character portions having an arbitrary size and an arbitrary character pitch; and A / D for A / D converting character portion data imaged by the image pickup means
A conversion unit, a storage unit for storing each necessary part cut out from each A / D-converted character part data, and a method for unifying the stored character part data with a character height and a character pitch between data. A selective assembling instruction device, comprising: an image processing unit that arranges images at respective predetermined positions in one screen and synthesizes images; and a CRT monitor that displays the images synthesized by the image processing units.

The image processing means includes, for example, a character part data teaching part for teaching the height, width, character pitch, and character length of the character part of each character part using an image taken by the imaging means of each character part. The display setting section for setting the display line, display start position, number of characters, character height and character pitch common to all character sections on the CRT monitor, and the character section data display section The character height scaling factor of each character part is determined from the character height of each character part and the character height common to all character parts set in the display setting part, and is taught by the character part data teaching part. Determining a character pitch scaling factor of each character portion from the character pitch of each character portion and a character pitch common to all character portions set in the display setting portion, a coefficient determination portion, and stored in the storage portion. Each of the imaged The character part data is read, the character height is scaled by the character height scaling coefficient determined by the coefficient determining part, and the character pitch is scaled by the character pitch scaling coefficient determined by the coefficient determining part. And a synthesizing unit for synthesizing an image by arranging the characters so as to be at the display start positions of the display lines of the respective character portions set by the display setting unit.

[Action]

In the above device, a character portion representing the processing accuracy rank of each work imaged by the imaging means is displayed on the screen of the CRT monitor in such a manner that the character height and pitch are almost unified to an arbitrary set height and set pitch. In addition, since the characters are aligned up and down, the operator can easily grasp and judge the contents, and it becomes easy to add the upper and lower characters. Further, the size and pitch of characters to be engraved or printed on the work can be freely selected, so that the degree of freedom in display design increases. Further, since each image is synthesized on one screen by the image processing means, a large number of switch circuits and the like are unnecessary, and complicated adjustment is not required.
Further, by providing the storage unit in the image processing unit, a shift in the timing of imaging is allowed, and the degree of freedom of the imaging unit and the imaging target is improved.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

1 to 7 show an embodiment of the apparatus according to the present invention. FIG. 1 shows the system configuration, and FIG. 2 shows a work 2b.
FIG. 3 is an example of image capturing screen synthesis, FIG. 4 is teaching of character size and pitch, FIG. 5 is a time chart of device operation, FIG. 6 is a flowchart of image capturing, storage, and display.
FIG. 7 shows a flowchart of teaching, setting, and coefficient determination, respectively. Table 1 shows an example of the size of characters displayed on the CRT screen.

In the process of assembling the other work 2b to the work 2a in the system configuration shown in FIG. 1 and the work shown in FIG. 2, parts having a size suitable from both the processing accuracy rank of the work 2a and the processing accuracy rank of the work 2b; For example, an example in which a spacer or the like is selectively assembled will be described. In the present embodiment, the work a is a cylinder block, and the work 2b is a crankshaft. FIG. 2 schematically shows the work 2b.

The work 2b flows on the conveyor 3b. The work 2b comes into contact with a work detection switch (not shown), the switch is turned on, and the PC (personal computer) 7 as an electric signal processing unit detects this turned on state,
A positioning command signal is output to the work positioning devices 9 and 9 'to clamp the work. After the work positioning is completed, the PC
The imaging command signal of the work 2b is output from 7 to the image distance device (image processing means) 20 (step 102 in FIG. 6). The work 2b is stored in the memory in the image processing device 20 for the work 2b.
3 characters corresponding to the 2 stamp characters
There is an address for characters, and a procedure for capturing an image using the CCD cameras 5b and 5c is set in advance (steps 103 to 10).
Five). Images are taken according to the procedure.

First, the image processing apparatus 20 selects and switches the CCD camera (imaging means) 5b (step 106) and outputs a strobe light emission pulse to the strobe 2b as a procedure for imaging and storing the engraved character portion 2b of the processing accuracy level (step 106). 107), CCD camera
A / D video signal from 5b (corresponding to imaging by switch 108)
The data is A / D-converted by the conversion unit and stored as digital data in a frame memory in the image processing device 20. From the data in the frame memory, only the range in which the engraved character portion 1b is shown (this range is set in advance) (step 109).
The necessary part is cut out in step (1)) and stored and stored in a specific position (a position is a storage area dedicated to the engraved character portion 1b) in the RAM (storage portion) (step 110). Next, the engraved character portion 1c is imaged and stored in the same procedure (by returning from step 112 to step 106 and repeating the cycle).
CCD camera 5c imaged with flash 6c
A / D conversion of the video signal from
Store and store in a dedicated storage area.

Since the imaging and storage of the work 2b has been completed, an imaging completion signal is output from the image processing device 20 to the PC 7 (step 11).
3).

Next, the work 2a flows on the conveyor 3a. When the PC 7 crosses the work passage confirming photoelectric tube devices 4, 4 ', the PC 7 detects the passage of the work, and outputs an imaging instruction signal of the character portion 1a indicating the processing accuracy level of the work 2a to the image processing device 20.
In the memory in the image processing device 20, for the work 2a,
There is an address of 5 characters corresponding to one engraved character part of the work 2a. A procedure for capturing an image using the CCD camera 5a is set in advance, and the work 2a is performed according to the procedure.
Is synchronized with the emission of the strobe light 6a. The following procedure is the same as that for the work 2b.

As described above, since the imaging and storage of the works 2a and 2b are completed (step 114), display for the worker 10 on the CRT monitor 8 is performed (step 115).

In order to make the display on the CRT monitor 8 easy for the operator 10 to see, the character size and character pitch need to be almost unified to an arbitrary size and pitch. The image processing device 20 uses the following procedure (see FIG. 7). Is illustrated).

The character size, character pitch, and number of characters of the engraved character to be imaged are different for each of the character portions 1a, 1b, and 1c. For this reason, each CC
Teaching is performed using a raw image screen captured by the D camera (imaging means) 5a, 5b, 5c (see FIG. 4). The part that teaches the character part is the character part data teaching part, which teaches as follows.

First, the X and Y coordinate values Xs of the Ps point at the upper left of the first character from the left,
Ys is given to the RAM in the image processing device 20 as constant value data. Next, Xe and Ye of the lower right Pe point are given. Now, Ps, Pe
Four straight lines passing through the point and parallel to the X and Y axes are drawn, and the characters in the square formed by the four straight lines are included so as to be in contact (character size setting in step 125 in FIG. 7). ,Teaching).

The X and Y coordinate values correspond to the horizontal and vertical (512 horizontal, 480 vertical matrix) positions of the frame memory in the image processing apparatus. Next, a gap between the first character and the second character from the left is given as lp. (Character pitch is set by Xe−Xs + 1 + lp) (character pitch setting and teaching at step 125 in FIG. 7) With this, the length lm of the character string is set (step 126 in FIG. 7), and lm = (Xe−Xs + 1) × n + lp × (n-1) n: the number of characters, which is set in advance.

 The character height hm can be obtained by hm = Ye−Ys + 1.

Before using this machine on a production line,
This is repeated for the engraved character portions 1a, 1b, 1c.

Thus, the length lma and height hm of a character string with the number of engraved characters 1a
a, the length lmb and height hmb of the character string of the engraved character portion 1b and the length lmc and height hmc of the character string of the engraved character portion 1c are determined in advance.

The imaged and stored engraved character portions 1a, 1b, 1c are displayed on the CRT monitor 8.
Configure the settings to be displayed in. The part for making this setting is the display setting part, which sets the display as follows.

First, the character portions 1b and 1c are displayed on the first line and the character portion 1a is displayed on the second line (see FIG. 3). In this machine, the display size per character on the CRT screen is shown in Table 1 according to the number of characters to be displayed per line (steps 121 to 123).

In the five characters of this embodiment, the size in the X direction per character is
84 x 3 = 252 ... Lb 1c is set to 2 characters, 84 x 2 = 168 ... Since Lc 1a is set to 5 characters, 84 x 5 = 84 x 5 = 420 ... La

 In the Y direction, the number of pixels is 128 pixels (H).

Note that there are 512 pixels in the X direction, and 92 pixels (512-420 pixels) are unnecessary portions. Therefore, unnecessary portions are halved and distributed to the left and right of the CRT screen. That is, the left 46 pixels and the right 4 on the CRT screen
Zero was written to the frame memory for 6 pixels so that it became black on the CRT screen.

Next, a method of determining the display position (display start position, display length, display line, etc.) of each engraved character portion (performed in step 127) will be described.

Xs ₁ = (512−W × N) / 2 W: Display size for one character in X direction N: Number of characters for one line Ys ₁ = 0 (fixed value) Engraved character portion 1c is Xs ₂ = (512−W × N) / 2 + W × nb nb: the number of characters in the engraved character portion 1b Ys ₂ = 0 (fixed value) The engraved character portion 1a is as follows: Xs ₃ = (512−W × N) / 2 Ys ₃ = 0 (Fixed value) Since the above display start position is the coordinate value of X and Y on the CRT screen, it is converted into the address of the actual frame memory by the following formula.

Address = base address _{+ Y 0 × 512 + X 0} ( _{where, X 0 = 0~511, Y 0} = 0~479, base address =
400000 (hexadecimal)) Next, the enlargement / reduction coefficients kx and ky for enlarging or reducing the captured and stored data on the CRT screen are obtained (step
128). The part that does this is the coefficient determination unit, which determines the coefficients as follows.

 The coefficient of the stamp character portion 1a is kxa = lma / La (coefficient in the X direction) kya = hma / H (the coefficient in Y direction) The coefficient of the stamp character portion 1b is kxb = lmb / Lb (the coefficient in the X direction) kyb = Hmb / H (coefficient in Y direction) The coefficient of the engraved character portion 1c is as follows: kxc = lmc / Lc (coefficient in X direction) kyc = hmc / H (coefficient in Y direction)

Next, the character part data stored in the storage part is synthesized and displayed on the CRT monitor. The part that performs the combined display is the combining unit, and the combined display is performed as follows. First, the character data stored in the storage unit is transferred from the storage area to the frame memory in order to combine and display the data on the CRT monitor.

Here, the above-described display start position (Xs, Ys), enlargement or reduction coefficient kx, ky, and character string length lm are used.

As an example, when trying to display at the (N, M) coordinate position on the CRT screen, data is read from the storage area (address) = Ks + M ′ × lm × ky + N ′ × kx, and the frame memory address = base address + M × 512 +
Data is written to N (step 129).

(However, N '= 0 to L-1 N = Xs to Xs + L M' = 0 to H-1 M = Ys to Ys + H Ks = Start address of the storage area [fraction below decimal point]) The above processing is performed (La + Lb + Lc) X Display all data repeatedly H times.

By the above processing, even when the size of the character at the time of imaging is different, the character can always be displayed in a substantially constant size when displayed on the CRT monitor, as shown in the composite screen of FIG. Further, the character pitch on the first line and the character pitch on the second line are displayed at substantially the same pitch.

The worker 10 adds the characters (numbers) on the first and second lines displayed on the CRT monitor, selects a part that matches the obtained added value, and assembles the part.

Example: If the first line is 0 1 2 2 1 and the second line is 1 2 3 2 1, the part with the added value 1 3 5 4 2 can be selected and assembled.

FIG. 5 shows a time chart of the image processing, FIG. 6 shows a flowchart of imaging, storage, and display, and FIG. 7 shows a flowchart of teaching. 6 and 7, 100 to 115 and 120 to 129 indicate respective steps.

In the above description, the display is performed immediately after imaging. However, if the storage area is enlarged (RAM is added), a plurality of sets of data can be stored and displayed on the CRT monitor sequentially from the previously stored data.

〔The invention's effect〕

According to the selective assembling instruction apparatus of the present invention, a plurality of character portion data are displayed at a predetermined position in one screen by substantially unifying the character height and the character pitch among the data and displaying the data at a predetermined position in one screen. Display character confirmation can be greatly improved. For example, by displaying characters where the characters are aligned vertically,
The first line and the second line in the above embodiment can be easily added by mental arithmetic, and it is possible to prevent a determination due to an addition error, a selection error, and the like. As a result, the working time can be reduced, and the quality and production efficiency can be improved.

In addition, since the character size and character pitch to be engraved or printed on the work can be freely selected, the degree of freedom of the character portion increases.

Furthermore, since the character data of a plurality of works is displayed at a time on the CRT monitor screen, the work time can be reduced as compared with the case where the plurality of data are visually observed on separate screens.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a selective assembling instruction apparatus according to an embodiment of the present invention, FIG. 2 is a schematic plan view of a work 2b, FIG. FIG. 5 is a timing chart of the teaching of the character size and pitch, FIG. 5 is a time chart of the apparatus of FIG. 1, FIG. 6 is a flowchart of imaging, storage, and display in the apparatus of FIG. 1, and FIG. 8 is a block diagram of an apparatus according to the conventional method, FIG. 9 is a block diagram of an apparatus according to another conventional method, and FIGS. 10A to 10F are image divisions according to the conventional method. FIG. 11 is a block diagram showing a synthesis example in the conventional method. 1a, 1b, 1c: Character portion 2a, 2b: Work 3a, 3b: Conveyor 4, 4 ': Photoelectric tube 5a, 5b, 5c: Imaging means (CCD camera) 6a, 6b, 6c: Strobe 7 ... PC (personal computer) 8 CRT monitor 9, 9 'Positioning device 10 Assembly worker 20 Image processing means (image processing device)

Claims (1)

(57) [Claims] A plurality of image pickup means for picking up a plurality of character portions each having an arbitrary size and an arbitrary character pitch; an A / D conversion section for performing A / D conversion of character portion data picked up by the image pickup means; A storage unit that stores each necessary part cut out from each A / D converted character part data, and a unitized character height and character pitch for each stored character part data for one screen A selective assembling instruction device, comprising: an image processing unit that arranges images at respective predetermined positions and synthesizes an image; and a CRT monitor that displays the image synthesized by the image processing unit.