JP3320183B2 - Wire measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire measuring apparatus suitable for measuring an ACSR (steel core aluminum stranded wire).

[0002]

2. Description of the Related Art In a prefabricated overhead line construction method, when laying an ACSR used for overhead power transmission, it is accurately measured in consideration of the slack amount and the like, cut off on the ground, and terminal-attached. The following devices are used for measuring such electric wires.

FIG. 2 is a schematic view of a conventional electric wire measuring device. In the figure, an electric wire 1 is pulled out of a supply drum 2 and is taken up in a direction of an arrow 4 by a take-up machine 3,
It is set so as to be wound on the winding drum 5.
A tension detector 6 for detecting the tension of the electric wire 1 traveling in the longitudinal direction is arranged, and its output is input to a brake unit 7. The brake unit 7 is a device having the same configuration as that of the endless belt type take-up machine 3, which applies a certain tension to the electric wire 1 traveling between the take-up machine 3 and the brake unit 7, and the electric wire 1 is substantially straightened. I try to run.

[0004] A magnetized portion 10 is provided on the traveling path of such an electric wire 1.
And a measuring section 15 are provided. The magnetizing unit 10 includes a magnetizing coil 11 and a magnetizing control unit 12. The measuring unit 15 includes a detection coil 16, a counter 17, a calculator 18, and a display 19. Magnetizing coil 1
1 is supplied with an electric pulse from the magnetization controller 12 at a predetermined timing. The magnetizing coil 11 is constituted by a solenoid coil or the like that locally magnetizes the electric wire 1 by the pulse. The magnetization control unit 12 includes a power supply for pulse generation, a switch, and the like.

[0005] The detection coil 16 is a magnetic mark 13 of the electric wire 1.
And supplies the detection signal to the counter 17 and the magnetization controller 12. The magnetization control unit 12 is configured to receive the output of the detection coil 16 and operate to supply a pulse to the magnetization coil 11 at the timing when the detection coil 16 detects the magnetic mark. As a result, when the distance between the magnetizing coil 11 and the detection coil 16 is L, the magnetic mark having the pitch L is regularly formed on the electric wire 1. The counter 17 is a circuit for counting such magnetic marks, and the arithmetic unit 18 is a circuit for multiplying the number of magnetic marks by the pitch L of the magnetic marks. The display 19 includes a display for displaying the result of the multiplication.

The above-described device operates as follows. That is, magnetic marks are attached to the electric wire 1 at a constant pitch L. Therefore, when the number of the magnetic marks is counted and multiplied by the pitch L, the length of the electric wire can be calculated. The pitch is actually about 10 m, and the wire is cut accurately at the site where the wire is laid or at the factory side where the terminal is shipped with terminals attached in advance.

[0007]

However, the above-described conventional wire measuring device has the following problems to be solved. In some cases, the accuracy of the measuring rule required when laying electric wires overhead may be required to be on the order of 1/10000. Therefore, for example, when measuring and cutting a 253 m electric wire, if the pitch L is 10 m,
After repeating the magnetization and detection three times, 3 m
Measure the minute. On the other hand, a marker (not shown) laid on the wire measuring device is used to spray ink on the measuring start portion and the measuring end portion, and the operator applies paint of a predetermined color to the ink portion, and further paints the ink portion. A marking operation is performed on which a vinyl tape is wound, whereby a cut portion of the electric wire is displayed.

However, since such a marking operation is performed by an operator, an error may occur. If the marking is performed at a position other than the ink portion, the error may be several tens cm. However, it will be a big trouble for the overhead line.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an electric wire measuring device capable of detecting an error in marking of an electric wire by an operator before cutting the electric wire. .

[0010]

According to the present invention, there is provided an electric wire measuring apparatus comprising: a magnetized portion for attaching magnetic marks to electric wires at regular intervals; a counter for counting the number of magnetic marks; And a marker unit for marking a measuring end point, a mark reading unit for detecting a visible mark added by an operator at each of the marking positions, and a counter for the counter.
The travel distance of the electric wire is detected based on the count value, and
The remaining length of the specified measuring length is measured by the measuring machine.
When the scale position is determined to be the scale end point,
It said mark and computing unit reading unit calculates the length of the wire between the two visible marks detected between the said two visible marks obtained by previously specified total Shakunaga said arithmetic unit to
It is characterized in that by comparing the length and a determining mark error determination section success or failure <br/> the attached position of the visible mark.

[0011]

[Action] This apparatus performs a magnetized to the wire in the magnetized part, Cow
Then , the number of the magnetic marks is counted. On the other hand, the visible mark provided in visible marks and total length end point side attached to the gauge length starting point side is read by the mark reading unit, mosquitoes
The length between both visible marks is calculated by the computing unit based on the und value.
Is calculated . Comparing the total length specified length and which, if both the length dimension Re matches substantially determines the position of the visible mark is correct, it is determined that with an error of the visible mark if Re only large dimensional difference.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. FIG. 1 is a block diagram showing an embodiment of an electric wire measuring device according to the present invention. The device shown in the figure is different from the device already described with reference to FIG. 2 in that a device for reading a visible mark such as paint or vinyl tape is added.

That is, on the traveling path of the electric wire 1 shown in the figure, a magnetizing unit 10 for attaching magnetic marks to the electric wire at regular intervals, a counting unit 20 for counting the number of magnetic marks, and a pair of rollers for sandwiching the electric wire 1 And a measuring instrument 33 for monitoring the traveling distance and measuring the length of the electric wire. Furthermore,
A marker 32 for spraying ink or the like is provided near the magnetized portion 10 at the measuring start point and the measuring end point of the electric wire 1. Further, near the counting section 20, there is provided a visible mark reading section 35 for reading a visible mark such as a tape wrapped around the ink portion by an operator. The magnetizing unit 10 includes a magnetizing coil 11 and a magnetizing control unit 12 having the same configuration as described with reference to the related art.

The marker 32 includes a marker control unit 3.
1 is connected, the marker 32 is operated in synchronization with the driving of the magnetizing coil 11, and ink is sprayed on the electric wire 1. Specifically, the marker 32 is composed of a spray or the like that sprays ink or the like, and the marker control unit 31
Is composed of a circuit including a switch for operating the spray using a relay or the like. The counting unit 20 includes the detection coil 16 described in the conventional example and a counter 17 that counts output pulses of the detection coil 16.

The mark reading section 35 is a mark sensor 3 for reading a visible mark attached to the electric wire 1.
6 is provided. The mark sensor 36 includes, for example, an image line sensor or a color camera and a circuit for confirming an image.

The apparatus is provided with a result processing section 30 in order to control each section as described above. The result processing unit 30 includes the output of the counting unit 20 and the measuring instrument 33.
And the output of the mark reading unit 35 are input. The result processing unit 30 includes an arithmetic unit 22, a mark error determination unit 23, and a display unit 24. The arithmetic unit 22 is configured by a processor or the like that calculates input data and performs certain processing. The mark error determination unit 23
It is composed of a circuit for comparing a predetermined measuring length and a length between visible marks to determine whether or not there is an error in the visible mark. This is composed of, for example, a comparison circuit or the like, and the result is displayed on the display unit 24. The display unit 24 includes a CRT display, a liquid crystal display, and the like. Note that the arithmetic unit 22 is configured to receive a signal from the gauge length designation unit 38. The measuring length designation section 38 is composed of a keyboard or the like, and is provided for an operator to input a length to be measured and to supply the input to the arithmetic unit 22. This value is used by the mark error determination unit 23 and the like, and is used to determine an erroneous writing of the visible mark.

The device of the present invention operates as follows. First, when measuring the electric wire 1, first, ink is sprayed by the marker 32, and a vinyl tape is wound around the ink portion by a worker, and this becomes a visible mark. At the same time, the magnetizing coil 11 is operated to make a magnetic mark. When a magnetic mark attached to the electric wire 1 is detected by the detection coil 16, the detection pulse is input to the magnetization control unit 12, the magnetization coil 11 operates at the same timing, and the next magnetization mark is formed again. Apply. When the mark sensor 36 of the mark reading unit 35 detects a visible mark, the detection signal is input to the calculator 22. Thereby, counting of the pulse output from the measuring instrument 33 is started, and the measuring of the electric wire 1 by the measuring instrument 33 is started. The measuring instrument 33 is configured by a device that outputs a pulse corresponding to the measuring length by, for example, a rotary encoder.

Thereafter, the counting mark 20 counts the magnetized mark by the magnetized coil 11, and if the pre-specified gauge length is, for example, 253m, when the counter 17 counts 25, the marker 32 is counted to the remaining 3m. Find the end point of the shaku and spray ink. Then, a vinyl tape is wrapped around the ink portion again by a worker, and this becomes a visible mark. Note that the remaining 3 m of the measuring rule may use the output of the measuring device 33, or may be measured by another operator using another means. Furthermore, when the electric wire 1 travels and the visible mark at the end point of the scale is read by the mark reading unit 35, the traveling of the electric wire 1 ends. At this time, a visible mark detection signal is output from the mark sensor 36 to the calculator 22. The computing unit 22 receives the output of the measuring instrument 33, calculates the length between the measuring start point and the measuring end point measured by the measuring instrument 33, and calculates the length between the visible mark reading unit 35 and the marker 32. Add the distance between them. This measures the length between the two visible marks.

On the other hand, the operator inputs a pre-designated scale length to the computing unit 22 using the scale length designation section 38. Then, these data are sent to the mark error determination section 23 and compared. If the error between the two is less than a certain value, it is determined that the visible mark is correctly attached. If the error between the two is more than a certain value, it is determined that the visible mark has been incorrectly attached. The result is displayed on the display unit 24. The counting result of the counting unit 20 is output to the arithmetic unit 22, and the number of the magnetized marks, the gauge length of the electric wire 1, and the like are separately displayed on the display unit 24.

FIG. 3 is a diagram for explaining the operation of the mark error determination unit 23 according to the method of the present invention. As shown in this figure, when the electric wire 1 travels in the direction of the arrow, a visible mark is attached to the scale start point, and a similar visible mark is also attached to the scale end point. It is wrapped with vinyl tape or the like. The first magnetic mark is applied to the portion Xm beyond the measuring point, and 250m every 10m
Up to the magnetic mark. The last magnetic mark is 26
The second magnetic mark. Y from the last magnetic mark
A visible mark of the end point of the measuring scale is again provided by the operator behind m.

As a result, the distance between the visible mark of the measuring start point and the measuring end point has a value of 10 × N + X + Y. In this example, N is 25. The measuring instrument 33 measures this distance using, for example, a rotary encoder or the like. Therefore, an error occurs due to the width of the vinyl tape, the slip of the roller, and the like. Such an error is set as an allowable error range, and the position of the visible mark is confirmed. If the visible mark is placed at the wrong position, a predetermined error will occur. The mark error determination unit 23 operates to determine whether or not the error is equal to or greater than an allowable error and to display whether or not there is an error in the position of the visible mark. As described above, according to the method of the present invention, it is possible to detect an error in attaching a visible mark by an operator before cutting the electric wire.

The present invention is not limited to the above embodiment. The configuration of the magnetizing unit and the counting unit in the above embodiment may be replaced with a similar well-known device. The visible mark is not limited to a vinyl tape, but may be any mark that can be recognized with the naked eye such as paint. Further, for the detection in the mark reading unit, various mechanisms capable of optically detecting a visible mark can be employed. Here, the visible mark is colored, for example, a red mark is a span mark for attaching to a tension tower, a green mark is a span mark for a suspension tower, and other yellow marks are auxiliary marks. It may be configured to distinguish and detect a specific color.

[0023]

The electric wire measuring device of the present invention described above has the following features.
A magnetic mark is applied to the electric wire at regular intervals, the number is counted, and the measuring is performed.On the other hand, a measuring machine that measures the length of the electric wire separately is provided, and the measuring point of the electric wire starts and ends. Vs point
Since the detected visible mark is detected, the interval between them is calculated , and compared with a preset measuring length, an error in attaching the visible mark caused by a simple mistake of an operator is detected before the electric wire is cut. be able to.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an electric wire measuring device according to the present invention.

FIG. 2 is a block diagram showing an example of a conventional wire measuring device.

FIG. 3 is an explanatory diagram illustrating a mark error determination method of the wire measuring device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire 10 Magnetization part 20 Counting part 23 Mark error judgment part 32 Marker 35 Mark reading part

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-42105 (JP, A) JP-A-48-95256 (JP, A) Full-fledged Showa 51-107349 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) H02G 1/02 G01B 7/04

Claims (1)

(57) [Claims] A magnetizing section for attaching a magnetic mark to the electric wire at regular intervals; a counter for counting the number of the magnetic marks; a marker section for marking a measuring start point and a measuring end point of the electric wire; A mark reading unit that detects a visible mark added by an operator at each of the marking positions, and detects a traveling distance of the electric wire based on a count value of the counter, and a remaining length of a pre-designated measuring length. Dimensions
When measured by a measuring instrument, the measuring position is determined by the measuring end point.
Wherein said mark reading unit detects as to determine the
A calculator for calculating the length of the wire between both the visible mark, before the determined by pre-specified a total Shakunaga the calculator
Serial by comparing the length between both the visible mark of the visible mark
Wire gauge scale apparatus characterized by comprising a labeled the determining mark error determination section success or failure of the position.