JPH0469503A - Precise measuring method for cable length - Google Patents

Abstract

PURPOSE:To measure the cable length with excellent operability and high accuracy by fixing a magnetic tape to the cable to be measured and measuring the cable while passing it between a magnetization device and a magnetic sensor. CONSTITUTION:The magnetic tape 10 from a bobbin 11 is continuously stuck and fixed on the rubber plastic cable 5 from a sending-out drum 6 while magnetized by the magnetization device 1. Then the magnetized place is detected when passing the magnetic detection part of a magnetic sensor 2, the sensor 2 outputs a detection signal, and the frequency of detection is counted to measure the cable 5. The precise measurement is continuously performed by this method with good operability.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Field of Application) The present invention provides a method for precisely measuring the length of a cable, which is used when extending a prefabricated cable such as a rubber/plastic cable. Regarding.

(Prior art) Generally, when a cable such as a rubber/plastic cable is laid, a cable connection part for connecting to another cable or device is formed at both ends. Forming it at the installation site lengthens the construction time and creates obstacles to traffic, etc., so
A so-called prefabrication method is now being used, in which the cable to be laid is precisely measured in advance according to the length of the cable to be laid, and connections are formed at both ends of the cable in a factory before laying.

In such conventional prefabricated construction methods, as a method of precisely measuring cables, a long measure is attached to the outer circumference of the cable in the longitudinal direction, and when creating the measurement, the position of the end of this measure is adjusted to the next measure. Move the measurer one by one so that it is in the starting position when
A method was adopted in which the number of movements was added up.

(Problem to be Solved by the Invention) However, such a conventional cable precision measuring method has poor workability and also causes errors due to slack in the measurer and positional deviation when moving the measurement start point of the measurer. This problem is likely to occur, and its improvement has been desired.

The present invention has been made to solve the problems of the conventional precision measuring method, and an object of the present invention is to provide a method for precisely measuring cable length that is easy to work with and has higher measurement accuracy. shall be.

[Structure of the Invention] (Means for Solving the Problems) The method for precisely measuring the length of a cable according to the present invention includes arranging a magnetizing device and a magnetic sensor at a predetermined interval, and measuring the length of a cable to be measured. A magnetic tape is fixed along the longitudinal direction, the cable is passed between the magnetizing device and the magnetic sensor, and the magnetic tape is magnetized by the magnetizing device, and this magnetized point is magnetized by the magnetic sensor. It is characterized in that the length of the cable is measured by the detection.

(Function) In the present invention, continuous work is possible and precision measuring work can be performed in the same way as normal rewinding work, so workability is good, and the workability is good. Since the spacing is fixed at a predetermined interval and even if the measurement is repeated multiple times, there will be no positional deviation when determining the starting point of the measurement due to magnetization, so the accuracy of the measurement can be significantly improved. .

(Example) Next, examples of the present invention will be described.

FIG. 1 shows a device used in the present invention, in which a magnetizing device 1 and a magnetic sensor 2 are installed in a straight line so that a predetermined distance I is maintained between the magnetizing head and the magnetic detection section. A cable pulling device 3 is arranged between the bracket magnetizing device 1 and the magnetic sensor 2. Reference numeral 4 denotes a control device which drives the magnetizing device 1 using a magnetizing signal applied from the outside or a magnetic detection signal from the magnetic sensor 2, and counts the magnetic detection signal from the magnetic sensor 2.

Further, a drum mount 7 on which a delivery drum 6 on which a rubber/plastic cable 5 to be measured is wound is mounted is disposed outside the magnetizing device 1, and this rubber/plastic cable 5 is placed outside the magnetic sensor 2. A drum mount 9 on which a winding drum 8 for winding up is mounted is arranged.

Furthermore, a delivery bobbin 11 on which a magnetic tape 10 is wound is disposed near the delivery drum 6, and a delivery bobbin 11 is disposed near the delivery drum 6.
In the vicinity of is a winding bobbin 1 for winding this magnetic tape 10.
2 is placed.

The magnetic tape 10 is an iron tape 10 as shown in FIG.
Laminate both sides of a with plastic tape 10b,
It has a structure in which an adhesive layer 10c is formed on one side, and a separator 10d is stuck thereon, and is wound onto the winding bobbin 12 with the separator 10d facing outward.

In this embodiment, first, a lead wire (not shown) is fixed to the end of the rubber/plastic cable 5 to be measured, and the end of this lead wire is passed through the cable take-up device 3 to the winding drum 8. Fixed to. And magnetic tape 10
Pull out one end of and peel off the separator 10d.
The end portion thereof is fixed to a winding bobbin (not shown), and the exposed adhesive layer 10c is pressed onto the outer periphery of the rubber/plastic cable 5 by a pressing roller (not shown).

Thereafter, when the separator lad is continuously peeled off while driving the cable pulling device 3, the magnetic tape 10 is continuously stuck to the outer periphery of the rubber/plastic cable 5.

Then, when the end of the rubber/plastic cable 5 passes through the magnetizing device 1, a magnetizing signal is sent, and the magnetic tape 10 is magnetized. When the rubber/plastic cable 5 is pulled out and the first magnetized point passes the magnetic detection part of the magnetic sensor 2, the magnetized point is detected, a detection signal is output from the magnetic sensor 2, and the number of detections is counted. Ru.

Then, when a detection signal is output from the magnetic sensor 2,
The control device 4 outputs a magnetization signal to the magnetization head to magnetize the magnetic tape 10 on the rubber/plastic cable 5 that is passing through.

In this way, when the magnetized location is detected a predetermined number of times, a marking device (not shown) is driven to mark the finally detected magnetized location. After measuring all the cables, use the rubber band at this marking point.
The plastic cable 5 is cut to obtain a rubber-plastic cable precisely measured to a predetermined length.

In the above embodiment, an example was explained in which an iron-plastic laminate tape was attached to the outer circumference of the cable as a magnetic tape, but the present invention is not limited to such an embodiment. It is also possible to use a tape on which a layer of magnetic powder is formed, or to use such a magnetic tape along the outer periphery of the cable core and cover it with a sheath.

[Effects of the Invention] As explained above, according to the present invention, precision measuring can be carried out continuously, so workability is good, and labor saving is possible.

In addition, the measurement is performed based on the distance between the magnetizing device and the magnetic sensor, which are placed at a predetermined interval, and the starting point of the measurement does not move, so the measurement can be performed with high accuracy. It can be carried out.

[Brief explanation of the drawing]

FIG. 1 is a side view illustrating an embodiment of the present invention, and FIG. 2 is a sectional view showing a magnetic tape used in the present invention. 1...Magnetizing device 2...Magnetic sensor 3...Taking device 4...Control device 5...Rubber/plastic cable 6.
...... Delivery drum 7.9... Drum mount 8... Winding drum 10... Magnetic tape 11... ...Feeding bobbin] 2... Winding bobbin

Claims (1)

[Claims] While a magnetizing device and a magnetic sensor are arranged at a predetermined interval, a magnetic tape is fixed along the longitudinal direction of the cable to be measured, and while this cable is passed between the magnetizing device and the magnetic sensor. A method for precisely measuring the length of a cable, characterized in that the length of the cable is measured by magnetizing the magnetic tape with the magnetizing device and detecting the magnetized location with the magnetic sensor. .