JPH0452504A - Measuring apparatus of length of linear body - Google Patents

Abstract

PURPOSE:To determine the length of a linear body by determining a distance between marks by reading the marks put on the linear body by a marking element. CONSTITUTION:At the time point when a mark put on a linear body is read by an industrial TV camera (ITVC) 11, a marking element 14 is triggered and thereby a mark is put on the linear body 1. When the mark put initially is read by ITVC 10 and the mark put subsequently by the ITVC 11 simultaneously, an image processing element 13 detects the deviation of each mark from a reference point of each of the ITVCs 10 and 11 and this deviation is added up to a distance la. Thereafter the process is executed likewise, integration of distances is conducted and thereby the total length of the linear body 1 is determined. Since the length of the linear body 1 is determined by reading the marks in this way, determination has no relation with the precision of the marking element 14 and a change in a line speed. Accordingly, the length of the linear body 1 can be determined with high precision.

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to a striatal measuring device for measuring the length of a striated body such as an electric wire, and in particular to a striated body measuring device that measures the length of a striated body such as an electric wire. It relates to a measuring device.

"Prior Art" Conventionally, various striatal measuring devices for measuring the length of the striatal body described above have been developed. Among these types, the one shown in Fig. 5 is one in which a measuring wheel 2 is pressed against the surface of the filament 1 and rotated, and the length is calculated from the number of rotations, and the one shown in Fig. 6 In this method, a gauge point 3 is clamped to the striatum l, and the length is calculated by measuring the reflected light from the gauge point 3 of the light emitted from the light source 4.

By the way, in the former case, mechanical slippage of the measuring wheel 2 against the linear body l occurs, so it is difficult to improve the inspection accuracy, and in the latter case, it is difficult to clamp the gage 3 at an accurate position. There's a problem. Therefore, a striatal measuring device shown in FIG. 7 has been developed which solves the above-mentioned problems. This device starts timing at the same time as the marking section 5 marks the filamentary body 1, and measures the time T until the industrial television camera (ITVC) 6 detects the mark. Then, the linear velocity V of the striatum l is integrated over the time T just measured, and the length of the striatum l is calculated. Since the length of the striated body 1 is measured in a non-contact manner in this way, the above-mentioned problems can be solved.

"Problem to be Solved by the Invention" By the way, the above-mentioned striatal body measuring device shown in FIG. was there. Furthermore, I.T.
Since the time required for the VC6 to detect the mark is measured, the time delay in marking the mark also causes errors.

The present invention was made in view of the above-mentioned circumstances, and an object of the present invention is to provide a striatal measuring device that can perform highly accurate measurements without being affected by fluctuations in linear velocity or delays in marking time. It is said that

"Means for Solving the Problem" The striatal measuring device according to claim I includes two imaging units arranged apart along the striatum, and a distance between the imaging units that is approximately the same. a marking section that is disposed on the supply side of the striatum from each imaging section and marks the striatum at a distance of The striatal body measurement device according to claim 2, further comprising a calculation unit that adds the error from the reference point to the distance between the imaging units and integrates the result. an imaging unit arranged at a certain distance apart; and markings arranged on the supply side of the striatum from the imaging unit and marking the striatum at intervals that fall within the image of the imaging unit; The camera is characterized by comprising: a unit; and a calculation unit that calculates an inter-mark distance each time the photographing unit reads the marks and integrates the results.

"Function" In the striatal measuring device according to claim 1, the distance between the two imaging units is kept constant, and the marks attached to the striatal body are each placed at approximately the same interval as this distance. The images are read at the same time by the photographing section, and the error from the reference point of the image of the photographing section for each mark is determined. Then, each of the obtained errors is added to the distance between the photographing units to obtain the distance between the marks. This process is performed between each mark, and the distances obtained are integrated.
Find the total length of the striatum.

In the striatal body measuring device according to the second aspect, the distance between the imaging section and the striatal body is kept constant, and the distance between the marks is measured by the imaging section. This process is performed for each mark, and the distances obtained are integrated to obtain the total length of the striatum.

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

FIG. 1 is a block diagram showing a schematic configuration of a striatal body measuring device according to a first embodiment of the present invention. In this diagram,
7 is a CPtJ (central processing unit) that controls each part of the device, 8
9 is a ROM (read only memory) in which a program for controlling the CPU 7 is written, and 9 is a RAM (random access memory) used in the CPU 7.

10 and 11 are industrial television cameras (ITVC) each using a C0D (charge coupled device), which are placed directly above the striatum 1 at a distance Qa. This distance (la is the distance from the center of the ITVCIO image to the center of the ITVCII image.

Video signals output from each of these ITV CI O, 11 are supplied to an image processing section 13 via an interface 12. Reference numeral 14 denotes a marking section, which is arranged at a distance Qa from the ITVC II on the supply side of the striatum l. In this case, it is not necessary to exactly match this distance Qa. The marking unit 14 sprays a coating liquid onto the filament 1 to mark it, and the marking starts when the CPU
The next marking is performed based on the control signal supplied from 7, and the next marking is performed when the ITVCII detects the mark. Here, the mark detection time is ITvct
This is the time when the center (reference point) of the image is reached at t.

Reference numeral 13 denotes an image processing unit which simultaneously reads each video signal output from ITVCIo and 11, calculates errors from the reference point, and adds these to the distance Mρa.

This process is performed every time the two ITV CIs 11 detect a mark, and the obtained results are integrated to determine the total length of the striatum l. Here, FIG. 2(a) is a diagram showing an image obtained by ITVCIO. As shown in this figure, the left side from the reference point is set as ten areas, and the right side is set as one area, and the mark MI in the figure is shifted by 6C3 from the center of the image toward the ten areas. On the other hand, FIG. 2(b) is a diagram showing an image obtained by ITVC II. As shown in this figure, the right side of the image is the ten area, and the left side is one area, and the mark M in the figure is shifted by Δh from the center toward the ten area. The distance obtained by adding these 6C3 and ΔC to the distance Qa becomes the distance between the marks M, .

According to the striatal measuring device configured in this manner, two ITVClo and 1+ are arranged at regular intervals along the striatal body l. Then, the mark made on the striatum l at the beginning is
When the CII reads the data, a trigger is applied to the marking unit 14 to mark the striatum l. Then, the first mark you put on it is ITVCIO, and the next mark you put on it is ITVC.
When the ITV CIs 1 and 11 read the images simultaneously, the image processing unit 13 detects the deviation of each mark from the reference point of each ITV CI O, 11, and adds this deviation to the distance Qa. From then on, perform the same process,
The total length of the striatum l is determined by integrating the distances.

In this way, the length of the striatum 1 is determined by reading the mark, so the marking part! It is not related to the accuracy of 4 and fluctuations in linear velocity. Therefore, the length of the striatum l can be determined with high accuracy.

Note that in this first embodiment, ITVCIo, 11
It is clear that the accuracy can be further improved by widening the interval.

Further, in the first embodiment, a mark is given to the striatum l, and this mark is detected by the ITV CIo, 11, but the following method of providing the mark and detecting it is also conceivable.

■ Spray magnetic particles to make them adhere, and detect the attached magnetic particles using a magnetic detector.

■A laser beam generator emits a laser beam to create a heat mark, and a bolometer is used to sense the heat and detect the heat mark. A bolometer is a type of thermal detector.
It detects thermal radiation by utilizing the fact that the resistance of metals and semiconductors changes with temperature.

■An electrostatic mark is created using corona discharge, and this electrostatic mark is detected using an electrode.

Furthermore, as an application example of the first embodiment, a magnetic detector or the like may be used instead of the ITVCIO, and the measurement timing may be determined, and the measurement correction may be performed based on the image captured by the 1TVCI. It is possible.

Next, FIG. 3 is a block diagram showing a schematic configuration of a striatal body measuring device according to a second embodiment of the present invention.

This second embodiment has the same configuration as the first embodiment described above, except that there is only one ITVCII and the marking section I6 is different. Therefore, description of parts common to FIG. 1 will be omitted.

As shown, the ITVCII is placed a certain distance from the striatum l, and the marking portion 16 is located at a certain distance from the striatum l.
It is located on the supply side of the striatum l than the CII. The marking section 16 is set so that the marking intervals are within the ITVC II image.

Now, while keeping the distance between ITVC II and striatum I constant, mark striatum I with the marking part 16, and measure the distance Qn (n = 1.2.3-n) between the two points on the image. It is determined by the processing unit 13. Then, the total length of the striatum l is calculated by integrating each of the obtained distances Qn. That is, L''Ql+Q*+Qs+...+ρ.

In this second embodiment, since the distance between marks is measured, there is no need to take the accuracy of the marking section 16 into consideration.

Further, there is an advantage that there is no need to link the ITVC II and the marking section 16.

"Effects of the Invention" As explained above, the striatal measuring device according to the present invention has the following features:
The marking section reads the marks marked on the striatum and calculates the distance between the marks to determine the length of the striatum. There is no mechanical slippage compared to those that rotate or clamp the gauge to the same striatum. Furthermore, since only the striatum is marked, fine precision such as mark spacing is not required. Furthermore, since the distance with respect to the mark is measured, it does not depend on the linear velocity of the filament, and errors due to fluctuations in linear velocity do not occur. Therefore, it is possible to obtain the effect that the length of the striatum can be determined with high accuracy.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of a striatal measuring device according to a first embodiment of the present invention, FIG. 2 is a conceptual diagram for explaining the operation of the first embodiment, and FIG. FIG. 4 is a block diagram showing a schematic configuration of a striatal body measuring device according to a second embodiment of the present invention, FIG. 4 is a conceptual diagram for explaining the operation of the second embodiment, and FIGS. 5 to 7 are FIG. 1 is a block diagram showing a schematic configuration of a conventional striatal measuring device. l...Striatum, 7...CPU. 8--...-ROM, 10. 1 1...
--= I TV C. 13... Image processing unit, 1416... Marking unit.

Claims (2)

[Claims] (1) A striatal body measuring device that measures the length of a striatal body in a conveyed state, wherein two
an imaging section of the stand; a marking section that is arranged on the supply side of the striatal body from each imaging section at substantially the same distance as the distance between the respective imaging sections and marks the striatal body; and a calculation unit that adds the error from the reference point of the image of each imaging unit to the distance between the imaging units and integrates the result each time the unit simultaneously reads the mark. Body measuring device. (2) A striatal body measuring device for measuring the length of a striatal body in a conveyed state, comprising: an imaging section disposed at a certain distance from the striatal body; a marking unit disposed on the supply side of the body and marking the striatum at intervals that fall within the image of the imaging unit; and a marking unit that calculates a distance between marks each time the imaging unit reads the marks. and an arithmetic unit that integrates the results.