JPH0621768B2 - How to measure the ring of an article - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for measuring a ring wheel of an article, which obtains a safe three-dimensional wheel ring data of the article from the brightness of the article captured by a solid-state imaging device.

“Problems to be Solved by Prior Art and the Present Invention” There are various means for grasping the shape of an article and appropriately displaying the shape on a display medium, but in these cases, a projector or the like is used. Many people use the line to capture the overall image of an article and then draw the circle by handwriting. Of course, it is not possible to expect accurate and quick depiction of the circle related to the article, projector, etc. It has been extremely difficult to grasp the size and shape of the article at any position by the detection by.

"Means for Solving Problems" The present invention is intended to solve the drawbacks found in these prior arts, in which a row of phototransistors is used to capture an object to be measured and the output varies depending on the light and shade formed. In addition to moving the DUT in the direction perpendicular to the arrangement direction of the phototransistors of the solid-state image sensor that emits light, the dot pattern rows that are located before and after the dot pattern row for which data is to be obtained are included. For the three rows, the front-back direction ringing data of the pattern row is obtained, and then the left-right direction data of the pattern row is obtained by shifting the pattern row by one bit to the right twice. It is a means to solve the problem by asking for three materials.

"Action""Example" Hereinafter, an example according to the present invention will be described in detail and its action will be described.

The solid-state image pickup device 1 is preferably a camera generally known as a CCD camera, and a solid-state image pickup device represented by the CCD camera (hereinafter referred to as CCD camera 1).
Is a predetermined number of phototransistors 1a and lenses 1b arranged in a line.
And is located above the DUT 2.

The DUT 2 always receives light from the illumination source 3, and a predetermined number of phototransistors arranged in a line (hereinafter, referred to as an optical line sensor-1).
It is called a. ) Is mounted on the article mounting table 4 that moves in a direction perpendicular to the direction in which the line) is arranged, and moves a certain amount under the optical line sensor-1a. Then, the optical line sensor 1a confirms the start position and the end position of the light and dark every time the optical line sensor 1a moves by a certain amount.

That is, in the optical line sensor 1a of the CCD camera, the shadow part where the light of the DUT 2 is not illuminated, that is, the dark part is Low.
At (0V), the light-exposed portion, that is, the dark portion is output at High (5V). Therefore, each time the DUT 2 moves in a direction perpendicular to the optical line sensor 1a by a certain amount. , High and Low will produce different outputs.

Then, High / Lo of this optical line sensor 1a
The pattern data of the article can be obtained by comprehensive evaluation of the position where w changes and the count value by the clock pulse emitted from the CCD camera 1.

FIG. 2 illustrates the case where the DUT 2 is moved in the direction of the arrow with respect to the optical line sensor 1a.
1 to 18 are bright parts illuminated by light, and show the distances to the start positions of the dark parts. In addition, d1 to d8 are shaded portions, that is, dark portions,
It represents the length of the dark part. In addition, ln ~
dn indicates a constant movement amount (range) in the direction perpendicular to the optical line sensor 1a of the object to be measured, and the pattern data of the article can be acquired by the above-mentioned l1d1 to 18d8 and ln to dn. Become.

Then, these data of 11d1 to 18d8 to 1ndn are stored in the memory 5a of the controller 5 as a set.

Thus, the pattern data of the object to be measured 2 was obtained, but at this stage, the final circular data of the object to be measured 2 has not yet been obtained. That is, the data obtained by moving the DUT 2 by a fixed amount is the optical line sensor 1
This is for the arrangement direction of a and the change in the moving direction has not been measured, and complete measurement data can be obtained only after the measurement process for the change in the moving direction is started. Therefore, the conversion processing into the ring-shaped data is obtained for each fixed amount of movement of the DUT 2 which is moved in the direction perpendicular to the arrangement direction of the optical line sensor 1a stored in the memory 5a of the controller 5. It is performed based on the pattern data, and the processing is performed by the following method. That is, when an attempt is made to obtain a circle for a certain pattern row in the moving direction of the DUT 2, first, the correlation between the pattern row and the pattern data of three rows including the rows before and after the pattern row is used. The data for the wheel crossings are obtained, and then the data for the wheel crossings on the left and right are obtained based on the three materials in the left and right directions, similar to the data before and after the above, and finally these are comprehensively evaluated. I will decide.

FIGS. 3 to 6 explain the processing method. First, with respect to the dot pattern row Pn-1 for which data is to be obtained circularly, the dot pattern row Pn positioned before the dot pattern row Pn and the dot pattern row Pn positioned thereafter are positioned. Dot pattern row Pn-2
Is specified as a processing target (see FIG. 3 (a)). In addition,
The symbols 0 and 1 here indicate that 0 is a bright part and 1 is a dark part.

Next, the dot pattern row P for which the ring data is to be obtained
AND processing is performed between n-1 and a pattern (1) obtained by reversing the light portion 0 and the dark portion 1 of the dot pattern row Pn located in front of the n-1 to generate data Qn (see FIG. 3).
(b)), a pattern row Pn-1 for further circular data acquisition, and a dot pattern row Pn located after that.
-2 is performed with the pattern P-2 obtained by reversing the bright and dark portions of -2 to obtain data Qn-2 (see FIG. 3).
(See (c)).

Next, a pattern R in which the dot pattern row Pn-1 for which data is to be obtained circularly is shifted to the right by 1 bit and a pattern R2 in which the dot pattern row Pn-1 is further shifted to the right by 1 bit are created (see FIG. 4 (a)). AND processing is performed between the pattern R and the pattern P-1 obtained by reversing the bright and dark portions of the dot pattern Pn-1 for which the ring data is to be obtained, and the data S1 is obtained (FIG. 4 (b)). reference). Furthermore, the bright and dark parts of the pattern R obtained by shifting 1 bit to the right of the Totto pattern sequence Pn-1 for which data is to be obtained in a circle and the pattern R2 obtained by further shifting the pattern R1 by 1 bit to the right are obtained by reversing them. An AND process is performed with the pattern (1) to obtain the data S2 (see FIG. 4 (c)).

The data Qn, Qn-2, S1, S2 thus obtained
Is comprehensively evaluated, the final ring-shaped data of the dot pattern row Pn-1 for which the ring-shaped pattern is to be obtained can be obtained. That is, the ring pattern Tn-1 of the dot pattern row Pn-1 to be obtained is obtained by ORing these data Qn, Qn-2, S1 and S2 ( (See FIG. 5).

In FIG. 5, Qn represents the upper end of the pattern row Pn-1 for obtaining the wheel sheave, and Qn-2 represents the lower end thereof. Further, S1 represents the right end and S2 represents the left end, which is illustrated in FIG.

Thus, the ringing data of the example Pn-1 is obtained, and the ringing data of the column Pn-2 located after this is the data immediately before that, that is, the column Pn-1 in which the ringing has been decided. It is decided based on the data of the subsequent columns, and thereafter, the data of the ring in the moving direction of the object to be measured can be obtained in order of one column. The wheel crossing data confirmed in the controller 5 is calculated and digitized by the computer 6 and sequentially connected as line data to be output to the plotter 7a which is a display medium. As a result, the plotter 7a appropriately enlarges or reduces the ring to depict it.

In addition, the size of the dark portion of a certain portion of the DUT 2 accumulated in the controller 5 is obtained, and the size of the portion is obtained. It is also possible to output to the printer 7b or the display 7c which is the display medium.

Reference numeral 8 in the drawing denotes a pulse motor for moving the article mounting table 4, which is operated by obtaining power from a pulse motor driver 9 which works in conjunction with the controller 5 and the computer 6.

[Advantages of the Invention] The present invention is intended for a dot pattern row for which ring-shaped data is to be obtained and dot pattern rows located before and after the dot-shaped row. Then, the ring-shaped data on the left and right of the dot pattern row for which the ring-shaped data is to be obtained is obtained on the basis of the three data in the left-right direction as in the case before and after the above. It is possible to more easily and accurately grasp the size and shape of the measurement object at any position.

[Brief description of drawings]

FIG. 1 is a block diagram illustrating an apparatus of the present invention, FIG. 2 is a conceptual explanatory view illustrating the state of pattern data of an object to be measured obtained by an optical line sensor, and FIGS. FIG. 3 is a diagram for explaining a processing method for obtaining data, and FIG. 3 is an explanatory view of a method for obtaining data before and after the pattern row for which data is to be obtained circularly, and FIG. 4 is a left and right side of the pattern row. FIG. 5 is an explanatory view of a method for obtaining the ring wheel data of the column, FIG. 5 is an explanatory view of a method for obtaining the final wheel wheel data of the column, and FIG. 6 is an explanation of the last wheel wheel of the column. . 1 ... Solid-state image sensor (CCD camera), 1a ... Optical line sensor, 2 ... Object to be measured, 4 ... Article mounting table, 5 ... Controller, 6 ... Computer, 7a ... Plotter, 7b. Printer, 7c ... Display, 8 ... Pulse motor.

Claims (1)

[Claims] 1. An object to be measured is captured by a predetermined number of phototransistors arranged in a line, and the object to be measured is moved in a direction perpendicular to the direction in which the phototransistors of a solid-state image pickup device that emit different outputs are formed. In the method for measuring the ring striking of an article, a dot pattern row (Pn) positioned before the dot pattern row (Pn-1) for which the wheel striation data is to be obtained and a dot pattern row positioned after the dot pattern row (Pn-1). A dot pattern sequence (Pn-1) for which (Pn-2) is the processing target and data is to be obtained in a circular pattern.
And a pattern (▲ ▼) obtained by reversing the bright and dark parts of the dot pattern row (Pn) located in front of it
Data (Qn) is obtained by performing the ND process, and then the dot pattern row (Pn-1) and the dot pattern row (Pn-2) located after that are obtained by reversing the light and dark portions (▲). AND-processing with ▼ -2) to obtain data (Qn-2), and further, dot pattern row (Pn
n-1) is a pattern (R) obtained by shifting 1 n to the right,
Create a pattern (R2) that is shifted by 2 bits in the same direction, and create a pattern (R) and dot pattern row (Pn-1).
The pattern obtained by reversing the light and dark areas (▲ ▼ -1)
AND (2) is performed to obtain data (S1), and the pattern (R) and the pattern (R2) further shifted by 1 bit to the right from the pattern (R) have the bright and dark parts reversed. AN with the obtained pattern (▲ ▼)
D processing is performed to obtain data (S2), and then these data (Qn), (Qn-2), (S1), (S2)
A method for measuring the hoop shape of an article, which is characterized by performing an OR operation.