JP3162099U - Translucent inspection device - Google Patents

Abstract

An object of the present invention is to measure the eccentricity and thickness of a glass tube with high accuracy and display the result in a visually easy-to-understand manner, thereby improving the quality of the processed product. A glass tube inspection device capable of An inspection apparatus for a translucent body includes an input unit for reference value information including a measurement reference item and a tolerance value for each measurement reference item, a holding unit for an inspected object made of a translucent member, and a translucent unit. A rotating means for a body to be inspected, a light source means for irradiating light to the body to be inspected, an image capturing means for capturing image information of light transmitted through the body to be inspected, and an image captured by the image capturing means It has a measurement means for measuring a measurement value for each measurement reference item based on information, and a calculation means for comparing the information input in advance by the input means with the measurement value information to make a pass / fail judgment. [Selection] Figure 1

Description

  The present invention relates to a method and an inspection apparatus for automatically determining whether or not a cylindrical translucent body is eccentrically / thickly inspected by an image processing technique.

The glass tube is formed with variations such as bending and uneven thickness. It is necessary to inspect whether or not these are predetermined standard dimensions. For this reason, a glass tube inspection method has been proposed. (Patent Document 1)

In addition to glass tubes, an inspection method on a processing line has been proposed as an eccentricity inspection method for a welding rod. (Patent Document 2)

However, these inspections are inspections of eccentricity related to the outer diameter of the tube, and inspections related to eccentricity and thickness deviation related to the inner diameter of the glass tube are not possible. Moreover, since there was no information on the direction and degree of eccentricity / thickening, it was unknown what kind of bending it was.
JP 2002-122421 A JP 2-25121

The present invention has been made to solve the above problems, and its purpose is to measure the eccentricity and thickness deviation of the glass tube with high accuracy and display the result in a visually easy-to-understand manner. Accordingly, an object of the present invention is to provide a glass tube inspection apparatus capable of improving the quality of a product processed with a glass tube.

The inspection device for a light transmitting body according to the present invention includes an input means for reference value information including a measurement reference item and a tolerance value for each measurement reference item, a holding means for the inspection object made of a light transmitting body, and a light transmitting body. An inspection object rotating means, a light source means for irradiating light to the inspection object, an image capturing means for capturing image information of light transmitted through the inspection object, and image information captured by the image capturing means. There is provided a measuring means for measuring a measurement value for each measurement reference item, and a calculation means for comparing the information input in advance by the input means and the measurement value information to make a pass / fail judgment.

The translucent inspection apparatus of the present invention is such that the translucent body is a glass tube, and the measurement reference items are an outer diameter, an inner diameter, an outer diameter position with respect to a reference position, an inner diameter position with respect to a reference position, a reference It is at least one of the center positions with respect to the position.

The translucent inspection device according to the present invention includes a rotating means that includes a means for fixing and holding one end of the cylindrical light transmitting body and a means for rotating the glass tube while holding the rotating light. The measurement item at a point separated by a specified distance from the fixed end is measured in synchronization with the recording means, and the measurement result information is compared with the recording means for recording the measurement result and the information input in advance by the input means And a calculation means for performing pass / fail determination.

The translucent inspection apparatus according to the present invention includes a rotating means that fixes and holds both ends of the cylindrical translucent body and a means for rotating the glass tube while holding the rotating means. The measurement item at a point separated by a specified distance from the fixed end is measured in synchronization with the recording means, and the measurement result information is compared with the recording means for recording the measurement result and the information input in advance by the input means And a calculation means for performing pass / fail determination.

Further, the translucent inspection apparatus of the present invention is configured so that the rotating means holds the holding state of the fixed portion of the cylindrical translucent body by a method equivalent to the measurement method of claim 1 or a non-existence such as a laser distance meter. It has a feature in that it has means for checking the holding state by measurement by contact or measurement by contact type.

In the translucent inspection device of the present invention, the inspection result is displayed as a two-dimensional radar graph displaying at least one of an eccentric amount and an eccentric amount relating to a designated position determined from a fixed end or a designated section. It has the feature to do.

In the translucent inspection device according to the present invention, the inspection result is displayed as a three-dimensional skeleton display of at least one of a plurality of designated positions or a plurality of designated sections from a fixed end. It has the feature to do.

  The effect of the present invention is that the inner diameter of the glass tube can be inspected by a backlight and a camera, and information on uneven thickness can be obtained by synchronous rotation measurement, so that a more accurate inspection can be performed. In addition, it is possible to visually understand the direction and degree of unevenness by displaying information on multiple surfaces obtained by synchronous rotation measurement for the measurement of eccentricity and unevenness of a glass tube. It can be analyzed and judged. In addition, since inspection sections can be set at a plurality of locations, it is possible to perform analysis and determination with higher accuracy.

Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.

  Depending on how the glass tube is bent, the glass tube holding method may be supported at one end or at both ends, but either method is possible. First, the case of one end support will be described.

  As shown in FIG. 1, one end of the glass tube is fixed by a chuck or the like 3 that can be rotated by a rotation mechanism 4 such as a motor and that can firmly hold the center of the shaft. The camera 1 is installed so as to project a glass tube at a certain distance from the glass tube holder, and the illumination device 2 is installed on the opposite side of the glass tube 5 from the camera.

The distance between the lighting device and the glass tube is adjusted so that the inner and outer diameters of the glass tube are well reflected. Also, adjust the position of the camera so that it is in focus. At this time, the image shown on the camera is as shown in FIG.

Confirm that the outer diameter 7 and inner diameter 8 of the glass tube are visible. In addition, since the center line of the chuck portion is stored in advance, the position of the chuck center line 10 on the image is stored using a calibration rod or the like that guarantees a straight line. The eccentricity of the glass tube is stored as the distance between the straight line 10 stored by this calibration and the center line 9 of the outer diameter 7 of the image.

Various measurement methods can be considered for the uneven thickness of the glass tube. For example, the distance 13 of the difference between the center line 9 of the outer diameter of the glass tube and the center line 11 of the inner diameter may be used. Further, it is considered that the distance between 7a and 8a and the distance between 7b and 8b may be taken. Or the ratio may be acceptable. In the description of FIG. 2, the measurement target is measurement of one cross section, but by making this into a plurality of cross sections, the eccentric knitted meat of the entire circumference of the glass tube can be measured.

As one method for measuring the eccentric thickness deviation of the entire circumference, there is a method in which a glass tube is rotated at a constant speed by a motor, and an image is recorded and measured in synchronization with the rotation angle. For simplicity, if the speed of the motor that chucks and rotates the glass tube is Vm (rpm) at a constant speed and n is the number in the direction of measuring the thickness deviation of the glass tube, the image capture speed Vip (sec ) Is expressed by the following equation.

このタイミングで、画像を取り込まなければならない。また、画像取込及び画像処理および表示にかかる合計時間ｔ（ｓｅｃ）は、

At this timing, an image must be captured. In addition, the total time t (sec) required for image capture, image processing, and display is

でなければならない。

Must.

In order to display the acquired data, first, a line segment centered on the rotation center of the glass tube is displayed as shown in FIG. The figure shows an example of 16 divisions. That is, the display is performed by rotating the line segment in increments of 22.5 degrees. For example, when the tertiary direction of the watch is designated as 0 degree, the maximum eccentricity value is a point indicated by 15, and the direction is a direction indicated by 17 and is a direction of 22.5 degrees. Conversely, the minimum eccentricity value is a point indicated by 16, the direction is a direction indicated by 18, and the direction is a direction of 202.5 degrees.

The uneven thickness can be displayed by the same method.

  As shown in FIG. 4, both ends of the glass tube are fixed so as to be supported by rotating disks 19a and 20a and 19b and 20a connected to a rotating mechanism of a motor (not shown).

The camera 1 is installed so as to project a glass tube at a certain distance from the glass tube holder, and the illumination device 2 is installed on the opposite side of the glass tube 5 from the camera.

The distance between the lighting device and the glass tube is adjusted so that the inner and outer diameters of the glass tube are well reflected. Also, adjust the position of the camera so that it is in focus. At this time, the image shown on the camera is as shown in FIG.

Confirm that the outer diameter 7 and inner diameter 8 of the glass tube are visible. In addition, since the center line of the chuck portion is stored in advance as a reference position, the position of the chuck center line 10 in the image obtained from the optical system to be measured by a calibration rod or the like that guarantees a straight line. Keep a record of what will come. The chuck center line 10 is preferably installed so as to be horizontal or perpendicular to the imaging surface of the camera.

The eccentricity of the glass tube is stored as the distance between the straight line 10 stored by this calibration and the center line 9 of the outer diameter 7 of the image.

Various measurement methods can be considered for the uneven thickness of the glass tube. For example, the distance 13 of the difference between the center line 9 of the outer diameter of the glass tube and the center line 11 of the inner diameter may be used. Further, it is considered that the distance between 7a and 8a and the distance between 7b and 8b may be taken. Or the ratio may be acceptable.

In the description of FIG. 2, the measurement target is measurement of one cross section, but by making this into a plurality of cross sections, the eccentric knitted meat of the entire circumference of the glass tube can be measured. The following is the same as in Example 1.

  In addition to the first embodiment, as shown in FIG. 5, the vicinity of the chuck is imaged with another camera to determine whether or not the chuck is accurately formed. If the eccentricity of the glass tube in the vicinity of the chuck is large, it is determined that the chuck is not good, and re-measurement is promoted, or the center deviation of the glass tube in the vicinity of the chuck can be corrected. The following is the same as in Example 1.

  In addition to the third embodiment, as shown in FIG. 5, the entire range of the glass tube can be captured by using a plurality of cameras instead of two cameras. As a result, the eccentricity of the entire glass tube can be measured, and the eccentricity can be displayed three-dimensionally. The following is the same as in Example 1.

  In addition to Example 2, as shown in FIG. 6, the degree of eccentricity of both end portions of the glass tube is detected, and it is confirmed whether the glass tube can be held properly. The following is the same as in Example 1.

In the embodiment, the eccentricity / thickness inspection of the glass tube has been described. However, the inspection object is not limited to the glass tube, and any eccentricity can be used as long as it is a cylindrical object that can be detected by a camera using X-rays or the like.・ Uneven thickness can be measured, and it can be widely used industrially for various inspection objects.

Schematic of the eccentric thickness inspection apparatus of the embodiment of the present invention Explanatory drawing of the object reflected in the camera of the embodiment of the present invention Eccentricity or thickness deviation display method according to an embodiment of the present invention Schematic of the eccentric thickness inspection apparatus of the embodiment of the present invention Schematic of the eccentric thickness inspection apparatus of the embodiment of the present invention Schematic of the eccentric thickness inspection apparatus of the embodiment of the present invention

DESCRIPTION OF SYMBOLS 1 Camera 2 Illuminating device 3 Chuck 4 Rotating mechanism 5 Glass tube 6 Image | video 7a obtained from a camera The outer diameter upper side 7b of a glass tube The outer diameter lower side 8a of a glass tube The inner diameter upper side 8b of a glass tube The inner diameter lower side 9 of a glass tube 9 Glass tube The center of the outer diameter of the shaft 10 of the axis of the rotating chuck 11 The center of the inner diameter of the glass tube 12 Eccentricity 13 Eccentricity 14 The center of the rotating axis 15 of the glass tube Maximum eccentric value 16 Minimum eccentric value 17 Maximum eccentric direction 18 Minimum eccentricity Direction 19a Rotating disk 19b Rotating disk 20a Rotating disk 20a Rotating disk

Claims (7)

Reference value information input means including measurement reference items and tolerance values for the respective measurement reference items, holding means for the object to be inspected made of a transparent body, rotating means for the inspected object made of a transparent body, Light source means for irradiating light to the inspection object, image capturing means for capturing image information of light transmitted through the object to be inspected, and measuring values for each measurement reference item based on the image information captured by the image capturing means A translucent body comprising: a measuring unit that performs measurement; a recording unit that records a measurement result; and a calculation unit that compares the information input in advance by the input unit with the measured value information to perform pass / fail judgment Inspection device. The translucent body is a glass tube, and the measurement reference item is at least one of an outer diameter, an inner diameter, an outer diameter position with respect to a reference position, an inner diameter position with respect to a reference position, and a center position with respect to the reference position. The translucent inspection device according to claim 1. The rotating means has means for fixing and holding one end of the cylindrical light-transmitting body and means for rotating the glass tube while being held, and is only a specified distance from the fixed end in synchronization with the rotation angle. It comprises a recording means for measuring the measurement item at a distant point and recording the measurement result, and a calculation means for comparing the information input in advance by the input means and the measurement value information to make a pass / fail judgment. The translucent inspection device according to claim 1. The rotating means has means for fixing and holding both ends of the cylindrical light-transmitting body and means for rotating the glass tube while being held, and only a specified distance from the fixed end in synchronization with the rotation angle. It comprises a recording means for measuring the measurement item at a distant point and recording the measurement result, and a calculation means for comparing the information input in advance by the input means and the measurement value information to make a pass / fail judgment. The translucent inspection device according to claim 1. With the rotating means, the holding state of the fixed portion of the cylindrical translucent body is held by a method equivalent to the measuring method of claim 1, measurement by non-contact such as a laser distance meter, or measurement by contact type. The translucent inspection device according to claim 1, further comprising means for checking a situation. The display of the inspection result is characterized in that at least one of a specified position determined from a fixed end or an eccentricity amount and a thickness deviation related to a specified section is displayed in a two-dimensional radar graph. Transmitter inspection equipment. The display of the inspection result is characterized in that at least one of a plurality of designated positions or a plurality of designated sections from a fixed end is displayed in a three-dimensional skeleton as a three-dimensional skeleton display. Transmitter inspection equipment.

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