JPH03176604A - Labeling position inspection device - Google Patents

Abstract

PURPOSE:To exactly inspect a labeling position by correcting a criterion and deciding whether or not a label is stuck at a regular position if the direction of a bottle detected by a direction detecting means deviates. CONSTITUTION:When the signal from a timing sensor 4a is inputted to a CPU 9, an inclination detecting circuit 11 calculates the tilt angle thetaB of the bottle 2 according to the outputs of laser displacement gages 6a and 6b and stores it in a memory. Further, when the signal from a timing sensor 5a is inputted to the CPU 9, a stroboscopic device 8 emits light in response to the signal from the CPU 9, the image signal from a TV cameras 7 is inputted to an image processor 13, and image data on the bottle 2 and its label which are stored in an image memory 14 are processed by the processor 13. The CPU 9 reads criterion data corresponding to the tilt angle thetaB of the bottle 2 stored in the memory of the circuit 11 out of a decision data table 15 and compares the criterion data with the calculated decision data to decide that the label 4 is not stuck on its regular position if the label position deviates from a permissible range.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a labeling position inspection device for inspecting whether a label affixed to a bottle is affixed at a proper position.

[Conventional technology]

For example, in beer, food (vinegar, edible surfaces), detergent factories, etc., it is necessary to inspect whether labels affixed to bottles are affixed in the correct position. In this case, conventionally, an inspector was placed beside the conveyor line that conveys the bottles and visually inspected the position of label attachment. For this reason, there are variations in the judgment criteria depending on the inspector, and even products within an acceptable range may be treated as defective. Another problem was that as inspectors become increasingly fatigued, they often miss labels that are not affixed in the correct position.

Therefore, in order to solve this problem, the labels attached to the bottles on the conveyor line are photographed with a TV camera, etc., and image processing is performed.Based on the obtained image data, the labels are placed in the correct position. Japanese Patent Application Laid-open No. 62127607 discloses a method for determining whether or not a label is pasted on a paper.

[Problem to be solved by the invention]

However, the above does not pose a problem if the bottles arranged on the conveyor line have a certain directionality with respect to the line, but if the directionality of the bottles is shifted, the labels will be in the correct position. It was not possible to accurately determine whether the

The present invention has been made in view of the above circumstances, and its purpose is to accurately check whether the labels are affixed in the correct position even if there is a deviation in the direction of the bottles on the conveyor line. Labeling is intended to provide a location inspection device.

[Means to solve the problem]

In order to solve the above problems, the label pasting and position inspection device according to the present invention includes an imaging means for taking images of bottles on a conveyor line and labels pasted on the bottles, and image data obtained by this imaging means. a storage means for storing; a determination means for determining whether the label is pasted at a proper position based on the image data stored in the storage means;
A detection means for detecting the directionality of the bottle, and a correction means for correcting the judgment length standard by sending a correction signal to the judgment means when there is a deviation in the directionality of the bottle detected by the detection means. This is what I did.

[For production]

That is, the present invention detects the orientation of the bottle using the orientation detection means, and if there is a deviation in the detected orientation of the bottle, corrects the criteria to determine whether the label is placed in the correct position. Since the position of the label is determined, the position of the label can be accurately inspected.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 to 5 show an embodiment of the present invention, and FIG. 1 is a diagram showing a schematic configuration of a label pasting and position inspection device according to the present invention. In the figure, a plurality of bottles 2 are arranged at regular intervals on a conveyor line 1, and these bottles 2
As shown in FIG. 2, a label 3 (not shown) is pasted at a predetermined position by a labeling device (not shown).

Furthermore, two sets of timing sensors 4a, 4b and 5a, 5b are arranged facing each other on both sides of the conveyor line 1 that conveys the bottles 2 in the direction of the arrow. These timing sensors 4a, 4b, 5a, and 5b correspond to the timing sensors 4a, 4b, and 5a for the bottles 2 on the conveyor line 1.

It is configured to output a timing signal when the timing sensor 5b crosses between the two, and the timing signal output from the timing sensors 4a and 5a is input to the CPU 9, which will be described later.

Further, laser displacement meters 6a, 6b are arranged upstream of the timing sensors 4a, 4b.

As shown in FIG. 3, these laser displacement meters 6a and 6b irradiate the surface of the bottle 2 with laser light and measure the distance to the bottle 2 by receiving the reflected light. , 6b is output from A/D converter 1
After the signal is converted into a digital signal at 0, it is manually input to a tilt detection circuit 11, which will be described later.

Further, a TV camera 7 and a strobe device 8 are arranged downstream of the timing sensors 4a, 4b and upstream of the timing sensors 5a, 5b, and the TV camera 7 is used to capture the bottle 2.
It is configured to image the label 3 attached to the bottle 2. The image signal output from the TV camera 7 is converted into a digital signal by an A/D converter 12, and then manually input to an image processing device 13, which will be described later. Further, the strobe device 8 is a CPU
Connected to 9.

The CPU 9 determines, for example, whether the label 3 is pasted at a proper position, and is connected to the above-mentioned tilt detection circuit 11 and image processing device 13 via a data bus.

The inclination detection circuit 11 is a laser displacement meter 6a.

The inclination angle θB of the bottle 2 is detected from the output of the bottle 6b, and the inclination angle θB of the bottle 2 is calculated by the following equation.

θ8-0n-・a-b C...(1) However, a. Distance to the bottle 2 measured by the laser displacement meter 6a b: Distance to the bottle 2 measured by the total a+++ by the laser displacement meter 6b C: Laser displacement Total distance between 6a and 6b (constant) Note that the inclination detection circuit 11 has a memo 1 function for temporarily storing the inclination angle θ11 of the bottle 2 obtained by the above equation.

The image processing device 13 processes the image signal from the TV camera 7 and calculates, for example, the distance from the end of the bottle to the end of the label (
d, label area A1, label upper end position H, label lower end position, and barycentric axis angle θL of the label 2, and includes an image memory 14 for storing image signals from the TV camera 7. ing.

Further, a determination data table 15 is connected to the CPU 9 via a data bus. This judgment data table 15 has a configuration as shown in FIG. 4, and includes various judgment standard data (for example, label position d, label area A1, label top position H, label bottom position) according to the inclination angle θB of the bottle 2. and the center-of-gravity axis angle θL, etc.) are stored.

FIG. 5 is a flowchart showing the operation of the label pasting position inspection device configured as described above, and step S1
When the signal from the timing sensor 4a is manually input to the CPU 9, the outputs of the laser displacement meters 6a and 6b are converted to the A/D
It is taken into the tilt detection circuit 11 via the converter 10 (
Step 52).

The inclination detection circuit 11 calculates the inclination angle θB of the bottle 2 based on the output from the laser displacement meter 6a6b, and stores this in the memory of the inclination detection circuit 11 (step S3).

Further, when the signal from the timing sensor 5a is manually inputted to the CPU 9 in step S4, the strobe device 8 starts to emit light according to the signal from the CPU 9 (step S5), and at the same time, the image signal from the TV camera 7 is sent to the A/D converter. 1
2 to the image processing device 13, and the image memory 1
4 (step S6). Then, the image data of the bottle 2 and the label 3 stored in the image memory 14 is processed by the image processing device 13, and based on the image data of the bottle 2 and the label 3, the label position d1 the label area A1 the label upper end position H1 the label lower end The positions i&L and the center-of-gravity axis angle θi are calculated (step S7).

When the label position d5, label area A, label upper end position H1, label lower end position LS, and center of gravity axis angle θ1 are calculated in step S7 in this way, the CPU 9 calculates the tilt angle θB of the bottle 2 stored in the memory of the tilt detection circuit 11. The judgment standard data corresponding to the above is called from the judgment data table 15 (step 8). Then, the various judgment standard data that have been called are compared with the judgment data calculated in step S7 (step S9), and if the label position d is outside the allowable range of the judgment standard data, the label 3 is placed in the normal position. If it's not pasted, I'll f'll 'M.

Furthermore, when the upper end position and lower end position of the label 3 are outside the allowable range of the determination reference data, it is determined as 'I'11 that the label 3 is not pasted at the correct position.

Furthermore, if the label area A is outside the allowable range of the judgment standard data, it is determined that the label 3 has wrinkles or tears, and the center of gravity axis angle θL of the label 3 is outside the allowable range of the judgment standard data. In this case, it is determined that the label 3 is attached at an angle with respect to the bottle 2. If any one of the above judgment data is outside the allowable range of the judgment standard data, the item is removed from the conveyor line 1 as a defective item (step 510).

In this way, in this embodiment, the directionality of the bottle 2 is detected by the laser displacement meters 6a and 6b, and if there is a deviation in the detected directionality of the bottle 2, the judgment criteria are corrected to ensure that the label 3 is correct. Since it is determined whether the label 3 is pasted in the correct position, it is possible to accurately check whether the label 3 is pasted in the correct position.

In the above embodiment, a laser displacement meter is used as a means for detecting the directionality of the bottle 2, but the directionality of the bottle 2 may also be detected by photographing the bottle 2 from above with a TV camera.

Furthermore, the present invention is not limited to the above embodiments,
Various modifications can be made without departing from the spirit of the invention.

〔Effect of the invention〕

As explained above, the label pasting position inspection device according to the present invention includes an imaging means for taking images of bottles on a conveyor line and labels pasted on the bottles, and stores image data taken by this imaging means. a storage means, a determination means for determining whether the label is placed in a proper position based on the image data stored in the storage means, a detection means for detecting the orientation of the bottle; The apparatus further includes a correction means for correcting the judgment criterion by sending a correction signal to the judgment means when there is a deviation in the directionality of the bottle detected by the detection means. Therefore, even if there is a misalignment in the orientation of the bottles on the conveyor line, it is possible to accurately check whether the labels are affixed at the correct positions.

[Brief explanation of the drawing]

Figures 1 to 5 show an embodiment of the present invention, Figure 1 is a diagram showing the schematic configuration of a position inspection device for label pasting, Figure 2 is a front view of the bottle, and Figure 3 is a laser displacement meter. FIG. 4 is a diagram showing the structure of the judgment data table, and FIG. 5 is a flowchart showing the operation of the same embodiment. 1... Conveyor line, 2... Bottle, 3... Label, 4a, 4b, 5a, 5b-... Timing sensor, 6a, 6b... Laser displacement meter, 7... TV camera, 8 ... Strobe device, 9... CPU, 10...
A/D converter, 11...4-way tilt detection, 12...A
/D converter, 13... Image processing device, 14... Image memory, 15... Judgment data table.

Claims (1)

[Claims] An imaging means for taking an image of the bottles on the conveyor line and the labels affixed to the bottles, a storage means for storing the image data obtained by the imaging means, and a system based on the image data stored in the storage means. a determining means for determining whether or not the label is affixed in the correct position; a detecting means for detecting the orientation of the bottle; What is claimed is: 1. A label pasting position inspection device comprising: a correction means for correcting a determination criterion by sending a correction signal to the determination means.