JP2011038789A - Method and device for inspecting mouth part of glass bottle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect a foam or a foreign matter at the peripheral wall of the mouth of a glass bottle with high precision even in the glass bottle having a screw or a longitudinal groove formed at the outer peripheral surface of the mouth thereof. <P>SOLUTION: Light projected on the outer peripheral surface of the mouth of the glass bottle which is rotated centering around its axial line from a lateral direction is scattered in the peripheral wall of the mouth, and on the basis of the quantity of the scattered light radiated from the top surface of the mouth, it is determined whether the foam or the foreign matter is present at the peripheral wall of the mouth of the glass bottle. If the foam or the foreign matter is present at the peripheral wall of the mouth, the projected light is scattered by the foam or the foreign matter, and since much scattered light is radiated from the top surface of the mouth of the glass bottle to arrive at a light detection means, a flaw of the foam or the foreign matter can be detected with high precision. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method and an apparatus for inspecting whether there are bubbles or foreign matters inside a peripheral wall of a glass bottle opening.

  As an inspection method and apparatus for performing this type of inspection, as disclosed in the following Patent Documents 1 and 2, light is projected onto the top surface of the glass bottle mouth or the outer peripheral surface or inner peripheral surface, and from the outer peripheral surface of the mouth. It is common to receive emitted fluorescent light or reflected light (transmitted light) and determine whether there is a defect in the mouth based on the amount of received light.

FIG. 9 is an explanatory diagram of such a conventional inspection apparatus.
Light receiving means such as a CCD camera is installed aiming at the outer peripheral surface of the glass bottle opening.
As shown in Patent Document 1, when light is projected onto the top of the mouth, if there is no defect inside the peripheral wall of the mouth, the amount of fluorescence received by the light receiving means becomes smoother from the top to the bottom. If there is a defect, a sudden change occurs in the process of decreasing the amount of received light from the upper part to the lower part, so that the defect can be detected.
As shown in Patent Document 2, when light is projected from the outer peripheral surface of the glass bottle mouth portion, if there are bubbles or foreign matter in the peripheral wall of the mouth portion, the portion becomes brighter in reflected light (or transmitted light), Defects can be detected.

Patent Document 3 below discloses a method and apparatus for detecting defects on the top surface of the glass bottle opening.
In this method, light is projected onto the top of the mouth, and the reflected light is captured to check whether the top of the mouth is defective.

Japanese Patent No. 3505655 JP 2008-107347 A WO2008 / 129650

The inspection methods and devices of Patent Documents 1 and 2 are capable of high-precision detection if the outer peripheral surface of the glass bottle mouth is smooth, but if the outer peripheral surface is screwed, Since the light radiated from the outer peripheral surface is disturbed by the lens effect, there is a problem that detection accuracy is extremely deteriorated.
It can be dealt with to some extent by advanced image processing that cancels the influence of screws, but for example, when there are bubbles or foreign substances in the screw thread or immediately inside it, it can hardly be detected. Furthermore, as disclosed in Japanese Patent Laid-Open No. 2000-142653, image processing for canceling the influence of the screw and the vertical groove on the bottle mouth portion having the vertical groove on the outer peripheral surface of the mouth and the screw being divided by the vertical groove is as follows. Almost impossible.

  The inspection method and apparatus of Patent Document 3 can detect defects on the top surface (surface) of the glass bottle mouth with high accuracy and can detect even the type of the defect. A foreign object cannot be detected.

  An object of the present invention is to make it possible to detect bubbles and foreign matters in the peripheral wall of the mouth with high accuracy even in a glass bottle having a screw or a vertical groove on the outer peripheral surface of the mouth.

[Claim 1]
The present invention is a method for inspecting whether there is a bubble or a foreign substance inside the peripheral wall of the glass bottle mouth portion, and the light projected from the lateral direction on the outer peripheral surface of the glass bottle mouth portion rotating around the axis is the mouth. Glass bottle mouth characterized by determining whether there are bubbles or foreign matter inside the peripheral wall of the glass bottle mouth based on the amount of scattered light scattered inside the wall and emitted from the top of the mouth It is a part inspection method.

The principle of the present invention will be described with reference to FIG.
A light projecting means is provided aiming at the outer peripheral surface of the bottle mouth, and light is projected from the lateral direction on the outer peripheral surface of the mouth. The light receiving means is provided aiming at the top of the bottle opening. When there are no bubbles or foreign matter inside the mouth peripheral wall, the projected light is transmitted laterally through the bottle mouth and very little light is scattered inside the mouth peripheral wall. Not reach.
As shown in FIG. 1, when there is a bubble or a foreign substance inside the mouth peripheral wall, the projected light is scattered by the foam or the foreign substance, and a lot of scattered light is emitted from the top of the bottle mouth and reaches the light receiving means. Therefore, it is possible to detect defects of bubbles and foreign matters.

  If there is a screw or vertical groove on the outer peripheral surface of the glass bottle mouth, the light that is emitted from the outer peripheral surface and enters the peripheral wall is affected by the screw or vertical groove, but the light does not reach the internal bubbles or foreign matter at all There will always be scattered light. Furthermore, the amount of light received by the light receiving means when there is no internal bubble / foreign matter is very small, so that scattered light caused by bubbles / foreign matter can be reliably detected even when there are screws or vertical grooves on the outer peripheral surface of the mouth.

[Claim 2]
Moreover, this invention is an inspection method of Claim 1 which receives the said scattered light with the line sensor camera by which the light receiving element was arranged in the radial direction of the glass bottle, and performs the said determination based on the received light quantity.

Specifically, a line sensor camera can be used as means for detecting the amount of scattered light emitted from the top surface of the glass bottle opening.
Thereby, it is possible to detect defects of bubbles and foreign matters with high accuracy by simple processing of line data without performing complicated image processing.

[Claim 3]
The present invention also receives edge light, which is reflected light of the light projected on the inner peripheral edge of the top surface of the glass bottle mouth portion, and the scattered light with the line sensor camera, and in each line data, the edge light is received. The inspection method according to claim 2, wherein an inspection area to be inspected is determined based on the received element address, and the determination is performed based on the amount of light received in the inspection area.

Since edge light is light reflected at the inner peripheral edge of the glass bottle opening, the position of the edge light is the position of the inner peripheral edge of the bottle opening.
Therefore, by determining the inspection area to be inspected based on the element address that has received the edge light and making the determination based on the amount of light received in the inspection area, for example, the center of the glass bottle is shifted from the rotation axis, Even in the case of shaking due to rotation, the inspection can be performed in an appropriate inspection region, and the inspection can be performed with high accuracy.

[Claim 4]
In the present invention, the line data of each line of the line sensor is searched from the inner side to the outer side of the mouth, and the received light amount data exceeds the edge signal threshold (EL), An area having a width larger than the edge width threshold (EW) is defined as an edge area, an address obtained by adding a predetermined offset value (OFS) to an arbitrary address in the edge area is defined as a test start position (GES), and the test start position ( 4. An address obtained by adding a predetermined inspection area width value (WID) to (GES) is set as an inspection end position (GEE), and an area from the inspection start position (GES) to the inspection end position (GEE) is set as the inspection area. It is the inspection method described.

Specifically, the inspection area can be determined as described above.
The two threshold values of the edge signal threshold value (EL) and the edge width threshold value (EW) are provided to detect the edge region (edge light position) because noise exceeding the edge signal threshold value (EL) is caused by the surrounding environment. This is because even if it enters, the position of the edge light is reliably detected by eliminating this.
An arbitrary address in the edge area for obtaining the inspection start position (GES) can be, for example, a start address, an end address, or a center address of the edge area. An address obtained by adding an appropriate offset value (OFS) to these arbitrary addresses is set as a test start position (GES).
The inspection end position (GEE) may be an address obtained by adding a predetermined inspection area width value (WID) to the inspection start position (GES).

[Claim 5]
In the present invention, the line data A of each line of the line sensor camera and the line data B of a line advanced by a predetermined difference interval (FP) from the line are subjected to differential processing within the inspection area, and the differential data is obtained. The number of elements having data greater than a predetermined difference threshold (TH) is obtained, and this operation is repeated from the line data A one after another by a predetermined number of differential executions (VS), and the total number of elements in the number of differential executions (VS). The inspection method according to claim 3 or 4, wherein when the total difference element number is larger than a predetermined difference element number threshold value (PXL), it is determined that there is a defect of a bubble or a foreign object.

Specifically, the detection of bubbles and foreign substances can be performed as described above.
In the present invention, the determination is not based on the abnormal component for each line, but is performed by comprehensively determining a plurality of line data of the set number of executions of the difference (VS). Defects that have been difficult to detect in the past can be detected with high accuracy, for example, over a wide range.

[Claim 6]
Further, the present invention is an apparatus for inspecting whether there are bubbles or foreign matter inside the peripheral wall of the glass bottle mouth part, and a rotating means for rotating the glass bottle around its axis, and an outer peripheral surface of the glass bottle mouth part. Based on the light projecting means A for projecting from the lateral direction, the light receiving means for receiving the scattered light radiated from the top surface of the mouth, and the light received by the light receiving means. The glass bottle mouth portion inspection apparatus has a foam / foreign matter detecting means for judging whether or not there is a bubble or foreign matter inside the peripheral wall of the glass bottle mouth portion.

Since the present invention is an apparatus that performs an inspection by the inspection method of claim 1, even when there are screws or vertical grooves on the outer peripheral surface of the mouth, it is possible to reliably detect light scattered by bubbles and foreign matters.
The rotating means is not particularly limited as long as it can rotate the glass bottle around its axis, and can be, for example, a rotating station of an existing inspection machine.
For example, the light projecting means may have LEDs arranged in a matrix on the surface.
The light receiving means may be a line sensor camera, a CCD camera, or the like.
The bubble / foreign substance detection means can be set in a commercially available personal computer.

[Claim 7]
Further, the present invention is the inspection apparatus according to claim 6, wherein the light receiving means is a line sensor camera in which light receiving elements are arranged in a radial direction of the glass bottle.

  Since the present invention is an apparatus that performs inspection by the inspection method of claim 2, it is possible to detect defects of bubbles and foreign matters with high accuracy by simple processing of line data without performing complicated image processing.

[Claim 8]
In the line data of the line sensor camera that receives the scattered light, the edge light that is the reflected light of the light projecting means B that projects light to the inner peripheral edge of the top surface of the glass bottle mouth portion. The inspection apparatus according to claim 7, further comprising inspection region detection means for determining an inspection region to be inspected based on an element address that receives the edge light.

Since the present invention is an apparatus for inspecting by the inspection method of claim 3, even when the bottle is shaken by rotation, it can be inspected in an appropriate inspection area, and the inspection can be performed accurately. Become.
The light projecting means B is preferably a device capable of projecting light within a narrow range of the curved portion of the inner edge of the top surface, such as a laser light source.
The inspection area detecting means can be set in a personal computer provided with the bubble / foreign substance detecting means.

[Claim 9]
In the present invention, the inspection area detection unit searches the line data of each line of the line sensor from the inner side to the outer side of the mouth, and the received light amount data exceeds an edge signal threshold (EL). An area in which the width of the area is larger than an edge width threshold (EW) is defined as an edge area, and an address obtained by adding a predetermined offset value (OFS) to an arbitrary address in the edge area is set as a test start position (GES). An address obtained by adding a predetermined inspection area width value (WID) to the inspection start position (GES) is set as an inspection end position (GEE), and the inspection is performed from the inspection start position (GES) to the inspection end position (GEE). The inspection apparatus according to claim 8, which is a region.

  Since this invention is an apparatus which inspects with the inspection method of Claim 4, an appropriate inspection area | region can be set reliably.

[Claim 10]
Further, according to the present invention, the bubble / foreign matter detection means includes line data A of each line of the line sensor camera and line data B of a line advanced by a predetermined difference interval (FP) from the line within the inspection area. Difference processing is performed, the number of data elements whose difference data is greater than a predetermined difference threshold value (TH) is obtained, and this operation is repeated from the line data A one after another by a predetermined number of differential executions (VS), and the number of differential executions (VS). The inspection apparatus according to claim 8 or 9, wherein when the total difference element number, which is the sum of the element numbers in the above, is larger than a predetermined difference element number threshold value (PXL), it is determined that there is a bubble or foreign object defect. is there.

  Since this invention is an apparatus which inspects with the inspection method of Claim 5, the fine defect which was difficult to detect conventionally can also be detected accurately.

  The present invention can easily detect bubbles and foreign matters in the peripheral wall of the mouth even in a glass bottle having a screw or a vertical groove on the outer peripheral surface of the mouth.

It is explanatory drawing of the principle of this invention. It is a schematic explanatory drawing of the test | inspection apparatus of an Example. It is a flowchart of the inspection apparatus. It is a flowchart of inspection area creation. It is explanatory drawing of the example of test | inspection area creation. It is a flowchart of a bubble and a foreign material detection. It is explanatory drawing of the difference space | interval FP and the difference implementation frequency VS. It is explanatory drawing of a difference process. It is explanatory drawing of the conventional inspection apparatus.

FIG. 2 is a schematic explanatory diagram of the inspection apparatus according to the embodiment. This inspection apparatus includes a glass bottle rotating means (not shown), a line sensor camera, a projector A (projecting means A), a projector B (projecting means B), a memory, an inspection area detecting means, and a bubble / foreign substance detecting means. Have
As the glass bottle rotating means, a rotating station of a conventional inspection apparatus was used.
The line sensor camera is arranged at a position where it can receive scattered light and edge light of the projected light so that the light receiving elements are arranged in the radial direction of the glass bottle.
The projector A projects light on the outer peripheral surface of the bottle opening, and a plurality of LEDs arranged in a matrix is used.
The projector B projects light on the inner peripheral edge of the top of the bottle opening (the curved surface portion of the inner edge of the top surface), and a laser light source was used.
The memory, the inspection area detecting means and the bubble / foreign substance detecting means are set in the computer.

Light is projected by the projector A and the projector B to the rotating glass bottle opening.
The projector A projects light from the lateral direction on the outer peripheral surface of the bottle opening. The light projection angle is not necessarily horizontal, and may be inclined by about 10 °, for example. The projected light enters the peripheral wall of the mouth, and a part of the scattered light scattered inside radiates from the top of the mouth and reaches the line sensor camera.
The projector B projects light to the inner peripheral edge of the top of the bottle opening. The projected light is reflected by the curved surface portion (R-shaped portion in the longitudinal section) of the inner peripheral edge of the top surface, and reaches the line sensor camera as edge light.
Each line data received by the line sensor camera is stored in a memory. The line data read from the memory is inspected by the bubble / foreign matter detection means while the inspection area is created by the inspection area detection means. If the bubble / foreign matter detection means determines that the failure is detected, a failure signal is output. In addition to being recorded in the memory, the failure signal can be used for the operation of a warning device or the operation of a defective bottle removing device.

The outline of the processing in this inspection apparatus will be described with reference to FIG.
Step 101 ... Is the data processing command ON?
Is determined first, and if it is YES,
Step 102: Proceed to data processing (defect detection), an inspection area is created by the inspection area detection means, and an inspection is performed by the bubble / foreign matter detection means. After this,
Step 103 ... Is it defective?
If YES, step 104... Proceeds to step 104... Records defect and the defect information is recorded in the memory of the computer. If NO, the process proceeds to step 105 as it is.
Step 105: Returning to the step 101 from the next data processing command, the above processing (steps 101 to 105) is repeated for the next bottle line data.

(Inspection area creation)
Next, the detection of the inspection area in each line of the line sensor will be described with reference to FIGS. FIG. 4 is a flowchart for creating an inspection area, and FIG.
In FIG.
Step 201: The edge signal threshold EL and the edge width threshold EW are set by setting the edge signal threshold EL and the edge width threshold EW. These values are determined in advance according to the type of bottle to be inspected.
Step 202... The offset value OFS is set by setting the offset value OFS. The offset value OFS is the number of elements for determining the inspection start position address GES in addition to the start end address (E1) of the edge regions (E1 to E2), and is determined in advance according to the type of bottle to be inspected.
Step 203... The inspection area width value WID is set by setting the inspection area width value WID. The area width value WID is determined in advance according to the type of bottle to be inspected.
Step 204 ... By setting the address of the data, the address of the memory for storing the data is set,
Step 205... Processing for clearing the memory address save area is performed. Thereafter, the following processing is performed on the line data of each address read from the memory.

Step 206... The line data is searched from the inner side to the outer side of the mouth top by searching from the left end address of the line data.
Step 207: A process of searching for an edge region exceeding the edge signal threshold value EL and the edge width threshold value EW is performed. First, regions (E1 to E2) exceeding the edge signal threshold value EL and the edge width threshold value EW are defined as edge regions.
Step 208: In the process of calculating the inspection start position address GES from the offset value, an address obtained by adding the offset value OFS to the start end address E1 of the edge region (E1 to E2) is set as the inspection start position address GES.
Step 209 ... By calculating the inspection end position address GEE from the inspection area width value and creating the inspection area of the line data, the address obtained by adding the inspection area width value WID to the inspection start position address GES is the inspection end position address GEE. And an inspection area from the inspection start position address GES to the inspection end position address GEE is created.
Step 210 ... Create an inspection area for each imported data (number of acquisitions N times)
In this process, the line data is fetched from the memory up to the Nth line data, and the processes of steps 206 to 209 are performed for each line data. The number N of intakes is set in advance, but is slightly larger than the number n of lines on the entire circumference of the container mouth, and is preferably about 1.3 times n + 10 to n.
Step 211: The line data in which the inspection areas are created by saving the data in the order of the fetched line data is sequentially saved in the memory, and the bubble / foreign matter inspection is performed by the bubble / foreign matter detecting means based on each line data.

In the upper graph of FIG. 5, the horizontal axis indicates the light receiving element array (element address) of the line sensor camera, and the vertical axis indicates the light receiving amount (output voltage) of each light receiving element. The lower part shows the mouth portion shape corresponding to the element arrangement.
Edge light projected from the projector B and reflected at the inner periphery of the mouth top surface is detected, and the amount of light received near the inner periphery of the mouth top surface is increased. Regions (E1 to E2) exceeding the edge signal threshold value EL and the edge width threshold value EW in the portion where the amount of received light is large are edge regions.
The address obtained by adding the offset value OFS to the start end address E1 of the edge region (E1 to E2) is the inspection start position address GES.
The address obtained by adding the inspection area width value WID to the inspection start position address GES is the inspection end position address GEE, and the inspection area is from the inspection start position address GES to the inspection end position address GEE.
In this case, since there are no bubbles / foreign substances in the inspection region, the amount of light received by the light receiving element is a low value.

[Bubble / foreign substance detection]
FIG. 6 is a flowchart of bubble / foreign matter detection. In the figure,
Step 301... Setting the difference filter F sets the difference filter F. The difference filter F is a difference between the two line data in the inspection gate.
Step 302... Setting the difference interval FP sets the difference interval FP. As a result, each line data is subjected to differential processing with the line data ahead of the FP. The FP can be 3 to 10, for example.
Step 303... Setting the difference threshold TH sets the difference threshold TH. The difference threshold TH is determined in advance according to the type of bottle to be inspected.
Step 304... The difference element number threshold value PXL is set by setting the difference element number threshold value PXL. The difference element number threshold value PXL is determined in advance according to the type of bottle to be inspected.
Step 305... The difference execution count VS is set by setting the difference execution count VS. As a result, VS pieces of difference data are handled as one set. The VS can be set to 2 to 10, for example.

Step 306 ... Load the first line data and set it as fetch data A Step 307 ... Load line data advanced FPth from the line data of fetch data A and set it as fetch data B Step 308 ... Capture data After the process of comparing A and captured data B,
Step 309... The difference data of the voltages of the captured data A and B in the inspection area is created by subtracting the captured data A and the captured data B advanced by FP using F.
Step 310 ... Is the difference data larger than TH?
If YES, the process proceeds to step 311. If NO, the process proceeds to step 312. If yes,
Step 311... After calculating the number of elements of data greater than TH and saving,
Step 312... The next line data is loaded and used as fetched data A, and the line data advanced by FP from the line data is loaded and fetched data B is processed. The “next line data” here is the next line data of the “capture data A” in step 309.
Step 313: After the process of comparing the captured data A and the captured data B,
Step 314 ... Have you compared VS times?
Is determined. This is for determining the bubble / foreign substance defect from the difference data of VS times. If NO, steps 309 to 314 are repeated, and if YES,
Step 315... Load the number of elements of data larger than TH for VS times, add all, and save as the total number of difference elements. This is a process of counting the number of elements whose voltage is greater than the difference threshold TH in each difference data for VS times, totaling the VS times, and saving it in the memory. afterwards,
Step 316... The next line data is loaded and processed as fetched data A. The “next line data” here is the next line data of the “capture data A” in step 313. afterwards,
Step 317 ... Did the predetermined line data be loaded and used as fetched data A?
Is determined. Here, the predetermined line data may be arbitrarily determined so that the process of step 315 is performed on all the line data of the entire circumference of the container mouth, for example, the (N-VS) -th line data. be able to. If NO in step 317, the processing from step 307 to step 317 is repeated. If YES,
Step 318... Load all the difference total elements saved in step 315 by loading all the difference total elements.
Step 319. Is any of the total number of differential elements larger than PXL?
Is determined. If there is at least one difference element number threshold PXL out of all the difference total elements, it is determined that there is a bubble / foreign object defect, and if there is not one, it is determined that the product is non-defective (no bubbles / foreign object).

FIG. 7 is an explanatory diagram of the difference interval FP and the difference execution count VS. This figure illustrates the case where the difference interval FP = 3 and the difference execution count VS = 5. Difference processing (I) is performed on the first line data acquired and the fourth line data acquired by the difference interval FP = 3 (step 309). Similarly, the second line data for acquisition and the fifth line data for acquisition are subjected to differential processing (II), the third line data for acquisition and the sixth line data for acquisition are subjected to differential processing (III), and the fourth line data for acquisition. Then, the seventh processing line data is subjected to difference processing (IV), and the fifth processing line data and the eighth processing line data are subjected to differential processing (V). Since the difference execution count VS = 5, the difference results from difference processing (I) to (V) are processed as one set. That is, each difference data is compared with the difference threshold value TH (step 310), the number of elements larger than this is obtained (step 311), and the number of elements greater than the difference threshold value TH for all of the difference processes (I) to (V). The total number of differential elements is obtained and saved (step 315).
As described above, the difference processing result from the first captured line data to the fifth captured line data is determined as one set.
After that, the next difference processing result from the sixth line data to the tenth line data is determined as one set.
After these processes are performed until predetermined line data is fetched (step 317), a determination is made by comparing all the difference total element numbers with the difference element number threshold value PXL (step 319).

  FIG. 8 is an explanatory diagram of the difference processing. Line data for the A line is shown in the upper left. The line data of the B line that is FP-th advanced from the A line is shown in the upper right. Since there are bubbles and foreign matter on the B line, the voltage in the inspection area (between WIDs) is high. The result of differential processing of the line data of the A line and the B line is shown in the lower right. The difference process is performed by subtracting the voltage within the inspection gate (between WIDs). In this case, since some elements in the inspection gate (between WIDs) are larger than the difference threshold TH, the number of elements is calculated (step 311).

With the inspection device of the example and the inspection device of the comparative example, the mouth inspection of about 50,000 glass bottles actually manufactured was performed. The inspection apparatus of the comparative example is a conventional inspection apparatus that projects light onto the outer peripheral surface of the mouth and receives the reflected light from the outer peripheral surface with a light receiving means.
Table 1 shows the inspection results.

Compared with the inspection according to the example, the inspection according to the comparative example misses about 35% of the bottle with a large defect of 1 mm or more, and misses about 73% of the bottle with a defect of 1 mm or less.
Thereby, the effect of the present invention was proved.

Claims (10)

A method for inspecting whether there are bubbles or foreign substances inside the peripheral wall of the glass bottle mouth,
Based on the amount of the scattered light emitted from the lateral wall of the mouth, the light projected from the lateral direction on the outer peripheral surface of the glass bottle mouth that rotates about the axis line is radiated from the top surface of the mouth. A method for inspecting a glass bottle mouth, wherein it is determined whether or not there are bubbles or foreign matter inside the peripheral wall of the part.   The inspection method according to claim 1, wherein the scattered light is received by a line sensor camera in which light receiving elements are arranged in a radial direction of the glass bottle, and the determination is performed based on the amount of received light.   The line sensor camera receives the edge light, which is the reflected light of the light projected on the inner peripheral edge of the top surface of the glass bottle mouth, and the element address that received the edge light in each line data. The inspection method according to claim 2, wherein an inspection area to be inspected is determined based on the received light amount in the inspection area. The line data of each line of the line sensor is searched from the inner side to the outer side of the mouth, and the received light amount data exceeds the edge signal threshold (EL), and the width of the area is the edge width threshold. An area larger than (EW) is defined as an edge area,
An address obtained by adding a predetermined offset value (OFS) to an arbitrary address in the edge region is set as a test start position (GES),
An address obtained by adding a predetermined inspection area width value (WID) to the inspection start position (GES) is set as an inspection end position (GEE), and the inspection area from the inspection start position (GES) to the inspection end position (GEE) is defined as the inspection area. The inspection method according to claim 3. The line data A of each line of the line sensor camera and the line data B of a line advanced by a predetermined difference interval (FP) from the line are subjected to differential processing within the inspection area, and the differential data is processed with a predetermined differential threshold value ( TH) Find the number of data elements larger than
This operation is repeated one after another from the line data A by a predetermined difference execution number (VS),
5. The method according to claim 3, wherein when a difference total number of elements, which is a sum of the number of elements in a difference execution count (VS), is larger than a predetermined difference element number threshold (PXL), it is determined that there is a bubble or a foreign object defect. Inspection method. A device for inspecting whether there are bubbles or foreign objects inside the peripheral wall of the glass bottle mouth,
A rotating means for rotating the glass bottle around its axis;
Projecting means A for projecting from the lateral direction on the outer peripheral surface of the glass bottle mouth,
Light receiving means for receiving the scattered light radiated from the top surface of the mouth, where the projected light is scattered inside the peripheral wall of the mouth,
An apparatus for inspecting a glass bottle mouth, comprising: a foam / foreign material detecting means for determining whether or not there is a bubble or a foreign substance inside the peripheral wall of the glass bottle mouth based on the amount of light received by the light receiving means.   The inspection apparatus according to claim 6, wherein the light receiving means is a line sensor camera in which light receiving elements are arranged in a radial direction of the glass bottle. A light projecting means B for projecting the inner peripheral edge of the top of the glass bottle mouth;
Inspection area detection means for determining an inspection area to be inspected based on an element address that has received the edge light in each line data of the line sensor camera that has received the scattered light and edge light that is reflected light of the light The inspection apparatus according to claim 7. The inspection area detecting means is
The line data of each line of the line sensor is searched from the inner side to the outer side of the mouth, and the received light amount data exceeds the edge signal threshold (EL), and the width of the area is the edge width threshold. An area larger than (EW) is defined as an edge area,
An address obtained by adding a predetermined offset value (OFS) to an arbitrary address in the edge region is set as a test start position (GES),
An address obtained by adding a predetermined inspection area width value (WID) to the inspection start position (GES) is set as an inspection end position (GEE), and the inspection area from the inspection start position (GES) to the inspection end position (GEE) is defined as the inspection area. The inspection apparatus according to claim 8. The bubble / foreign matter detecting means is
The line data A of each line of the line sensor camera and the line data B of a line advanced by a predetermined difference interval (FP) from the line are subjected to differential processing within the inspection area, and the differential data is processed with a predetermined differential threshold value ( TH) Find the number of data elements larger than
This operation is repeated one after another from the line data A by a predetermined difference execution number (VS),
10 or 9, when a difference total element number, which is the sum of the number of elements in the difference execution number (VS), is larger than a predetermined difference element number threshold (PXL), it is determined that there is a bubble or a foreign object defect. The inspection device described in 1.

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