JPS6041286B2 - Electric wire measuring device - Google Patents

Description

[Detailed description of the invention] The present invention relates to an electric wire measuring device.

When installing prefabricated overhead wires using hard aluminum stranded wire, hard steel stranded wire, etc., the length of the wire must be precisely measured, but since each of the above stranded wires does not have a copper core, it is necessary to use a precision gauge with magnetic markings attached. cannot be applied.

Therefore, a visible mark such as a jet marker is attached to the above-mentioned stranded wire, and measurement is performed using this as a reference.

In other words, set two fixed points separated by the length of the gauge, run the wire from one to the other, mark at the fixed point on the entrance side, detect the mark at the fixed point on the exit side, and feed back the detection output to mark. Signal. In this way, marks are attached one after another at intervals of the length of the measuring wire on the running electric wire, but unless dirt on the surface of the electric wire is distinguished from the visible marks, the measuring rod becomes inaccurate. The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to obtain a measuring device for electric wires that can perform measuring with high precision using visible marks. In the present invention, the above object is achieved by detecting marks using a scan camera having a photodiode array arranged in the length direction of the marks.

The invention will be explained in detail below with reference to the drawings.

In Fig. 1, fixed points X and Y are set along the running path of the electric wire 1 at an interval equal to the measuring length, and a visible mark attaching device 2 such as a jet marker is installed at the fixed point X on the entrance side of the electric wire. A scan camera 3 having a photodiode array in which photodiodes are arranged in the transverse direction of the wire is installed at a fixed point Y on the exit side. The output of the scan camera 3 is sent to a counter 4, and the counter output is given to a comparison circuit 6 that compares the set value 5 with the output, and the output of the comparison circuit determines whether the counter output and the set value are equal or smaller. It is input to the size discrimination circuit 7.

As a result of the size discrimination, when the result is large, the discrimination output is sent to the control circuit 8 that controls the mark attaching device 2, and when it is small, the output is sent to the counter 6 or set circuit 9. It will be done.

In the apparatus configured as described above, the setting value 5 is determined depending on how many photodiode arrays of the scan camera detect the mark.

That is, if the pulse train is detected by the N-tube photodiodes as shown in FIG. 2A by the N-tube pulse train, the set value is N.

As shown in Figure 2B, the scan camera 3
The detection output when detected by is smaller than that of the N cylinder. The comparison circuit 6 compares the count value of the output pulses of the scan camera 4 and the aforementioned set value N.

If the set value and the count value are equal, the output of the comparison circuit 6 is 0, and in this case, a regular mark has been detected, so the control circuit 8 drives the mark attaching device 2 to perform marking. .

If it is smaller than the set value N, the comparator circuit 6 produces an output; in this case, since dirt has been detected, said output is sent to the reset circuit 9 as dirt detection, which resets the counter 6. . As described above, according to the device of the present invention, marks are distinguished from dirt on the surface of the electric wire, and marking is performed only when a mark is detected. Therefore, even when measuring with visible marks, highly accurate measuring can be performed. can.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2A is a pulse waveform diagram when a regular mark is detected, and FIG. 2B is a pulse waveform diagram when dirt is detected. 1...Electric wire, 2...Mark attachment device,
3...Scan camera, 4...Counter, 6...Comparison circuit, 7...Large 4 discrimination circuit, 8...Control circuit, 9...Reset circuit. Multi-figure multi-figure 2

Claims (1)

[Claims] 1. Two fixed points are set up along the running path of the wire, separated by a meter length, and a mark attachment device that attaches a visible mark is installed at the fixed point on the entrance side, and the mark is optically detected at the fixed point on the exit side. A mark detecting device is installed and the mark attaching device is driven by the output of the detecting device,
A scan camera having a photodiode array arranged in the longitudinal direction of the mark is used as the mark detection device, a counter is provided to count the output pulses of the scan camera, and the counted output of this counter is compared with the number of pulses corresponding to the mark length. A measuring device for electric wires, characterized in that the mark attaching device is operated when the output of the comparison circuit is 0, and the counter is reset when there is an output of the comparison circuit. .