JPH0989696A - Measuring apparatus for wire tension - Google Patents

Abstract

PROBLEM TO BE SOLVED: To successively measure tension of a plurality of wires with a simple structure. SOLUTION: Based on detection of a wire 10 position by sensors 16, 18, a carrier 12 is positioned so that a constant length holding claw 22 is positioned at a position corresponding to a center of the wire 10. Then the wire is struck by a striking device 24, thereby detecting the number of vibrations generated from the wire 10 by a sensor 26, and wire tension is obtained from the detected number of vibrations of the wire and a relation between a pre-stored number of vibrations and tension.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire tension measuring device, and more particularly to a wire tension measuring device for measuring the tension of a wire used in a steel cord conveyor belt, a canvas conveyor belt, or the like.

[0002]

2. Description of the Related Art If the tension of wires used for steel cord conveyor belts, canvas conveyor belts, etc. is not constant, the steel cord conveyor belts will meander. We manufacture a conveyor belt using a wire whose tension is within the standard by removing the wire.

By the way, as a wire tension measuring device for measuring the tension of the wire, the wire is wound around three rolls, the force applied to the central roll is measured by a load cell, and the tension is calculated from the obtained value. Device, a device that measures the tension by measuring the amount of roll displacement by supporting the central roll with a spring instead of the load cell of this device, measuring the force applied to the mechanism that generates the tension, such as the pressure applied to the cylinder However, a device that calculates the tension of the wire based on the measured pressure is widely used.

[0004]

However, the device for measuring the force applied to the roll or the amount of roll displacement has the following various problems.

For example, since it is difficult to remove the wires when the tension is applied, even if it is attempted to measure the tension of a plurality of wires which are adjacently arranged in a short distance and are continuously arranged for each wire, several wires are required. The wires interfere and multiple wires must be measured together. On the other hand, in order to measure the tension for each wire, it is necessary to adjust the arrangement position of the wires, and in order to finish the tension measurement early, it is necessary to prepare a plurality of tension measurement portions. However, the entire apparatus becomes large and expensive, and it is necessary to regularly inspect all the tension measurement parts prepared, and the management man-hour becomes enormous. Further, it is necessary to adjust the roller distance each time the wire diameter changes. Also, the roller portion needs to be replaced due to abrasion with the wire. Furthermore, in a device that measures the amount of roll displacement by supporting the central roll with a spring, it is necessary to replace the spring. Also, the more highly accurate the tension needs to be measured,
The tension measuring portion needs to be highly accurate, and the measuring device becomes expensive. Furthermore, the measurement device is broken when an abnormally high tension is applied. Also, once the wire is loosened, it is likely that the wire will come off the roll, and the wire must be rewound around the roll each time.

Further, in the device for measuring the tension by measuring the force applied to the mechanism for generating the tension, since the actual wire tension is not measured, the resistance of the mechanism for generating the tension and the mechanical accuracy are not measured. There is a problem that there are too many errors due to.

The present invention has been made in view of the above facts, and an object thereof is to provide a wire tension measuring device capable of continuously measuring the tensions of a plurality of wires with a simple structure.

[0008]

In order to achieve the above-mentioned object, the invention according to claim 1 is arranged such that movable detecting means for detecting a wire position, movable vibrating means for vibrating the wire, and frequency of the wire are set. Measuring means for measuring, storage means for storing in advance the relationship between the frequency of the wire and the tension of the wire, moving means for moving the detecting means and the vibrating means, and moving the detecting means and the vibrating means When the detecting means detects the wire, the moving means is controlled so that the vibrating means is located at the wire position detected by the detecting means, and the vibration is performed so that the wire is vibrated at the wire position. Controlling the means to calculate the tension of the wire based on the frequency measured by the measuring means and the relationship stored in the storage means. It includes a calculation control means.

That is, the detecting means and the vibrating means are movable, and the calculation control means moves the detecting means and the vibrating means, and when the detecting means detects the wire,
The moving means is controlled so that the vibrating means is located at the wire position detected by the detecting means, the vibrating means is controlled so that the wire is vibrated at the wire position, and the frequency and the storage means measured by the measuring means are stored. The wire tension is calculated based on the relationship between the wire vibration frequency and the wire tension stored in.

As described above, the detecting means and the vibrating means are movable, and the vibrating means is positioned at the position of the wire detected by the detecting means to vibrate the wire. Since the tension of the wire is calculated based on the relationship between the tension and the tension, it is possible to continuously measure the tensions of the plurality of wires with a simple configuration without contact except for the portion that vibrates the wire.

The measuring means may be arranged so that the measuring means is located at the wire position as the vibrating means is located at the wire position.

According to a second aspect of the present invention, a detecting means for detecting the wire position, a vibrating means for vibrating the wire,
Measuring means for measuring the frequency of the wire, storage means for pre-storing the relationship between the frequency of the wire and the tension of the wire, the detection means, the vibration means, and a carriage provided with the measuring means, Transportation means for moving the dolly,
When moving the carriage and controlling the moving means so that the vibrating means and the measuring means are located at the wire position detected by the detecting means when the detecting means detects the wire, at the wire position The vibration means controls the vibrating means so that the wire vibrates, controls the measuring means so that the vibration frequency of the wire vibrated by the vibrating means is measured, and the vibration frequency measured by the measuring means. And a calculation control unit that calculates the tension of the wire based on the relationship stored in the storage unit.

That is, the detecting means, the vibrating means, and the measuring means are provided on the trolley, and the calculation control means moves the trolley and the wire detected by the detecting means when the detecting means detects the wire. The moving means is controlled so that the vibrating means and the measuring means are located at the position, the vibrating means is controlled so that the wire is vibrated at the wire position, and the frequency of the wire vibrated by the vibrating means is measured. The measuring means is controlled so that the tension of the wire is calculated based on the frequency measured by the measuring means and the relationship stored in the storage means.

As described above, the detecting means, the vibrating means, and the measuring means are provided on the carriage, and when the detecting means detects the wire while moving the carriage, the vibrating means and the measuring means are placed at the wire position. The wire is vibrated, the frequency of vibration generated by this is measured, and the tension of the wire is calculated based on the measured vibration frequency and the relationship between the frequency and the tension stored in advance. Since it is non-contact, the tension of a plurality of wires can be continuously measured with a simple configuration.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the wire tension measuring device according to the present embodiment has a plurality of wires 10 which are manufactured to have the same shape, weaving method, finished outer shape, etc. and are arranged at a predetermined height from the ground. Dolly 1 moving toward A
2 is provided. A pedestal 14 is provided on the carriage 12, and the pedestal 14 is provided with a light emitting element and light from the light emitting element on the wire 1
The wire 10 is configured by a light receiving element that receives the light reflected by 0, and outputs a detection signal while the light receiving element receives the light.
Wire detection sensors 16 and 18 for detecting the position are provided. Further, the carriage 12 is provided with an indicating member 20 which can be expanded and contracted in the B direction, and a fixed length holding claw 22 is attached to the indicating member 20. A hitting device 24 that hits the wire 10 by expanding and contracting in the C direction on the upper surface of the fixed length holding claw 22, and the wire 10 hit by the hitting device 24.
A vibration frequency detection sensor 26 for detecting the vibration frequency is attached. The frequency detection sensor 26 is a well-known one that magnetically detects the frequency of the wire 10 or detects the frequency of the wire 10 from the vibration sound of the wire 10. In this embodiment, the carriage 12 is moved in the A direction to measure the tension of the wire 10.

Next, the control system of the wire tension measuring device will be described with reference to FIG. As shown in FIG. 2, a microcomputer 28 is provided inside the carriage 12.
The microcomputer 28 includes a CPU 30, a ROM 3
2, a RAM 34, an input / output (I / O) port 36, and a bus 38 interconnecting these. The frequency detection sensor 26 is connected to the input / output port 36 via the above-described pointing member 20, the striking device 24, and the amplifier 40.

A motor 44 for rotating the front left wheel 42L and the front right wheel 42R is connected to the front left wheel 42L and the front right wheel 42R of the carriage 12 to rotate the front left wheel 42L and the front right wheel 42R. A rotary encoder 46 that transmits a pulse each time the shaft rotates a predetermined amount is provided on the shaft of the motor 44.
Is connected. The motor 44 and the rotary encoder 46 are connected to a microcomputer 48 provided outside the carriage 12, and the microcomputer 48 is further connected to the wire detection sensors 16 and 18, and the input / output port 36 of the microcomputer 28. There is.

A personal computer 50 is further connected to the input / output port 36 of the microcomputer 28.

Next, the operation of this embodiment will be described. First, the wire detection sensors 16 and 18 continuously detect a plurality of wires 10 arranged, and the detected wires 10 are detected.
The control of positioning the fixed length holding claw 22 at the position will be described.

When a start key (not shown) of the personal computer 50 is turned on, a start signal is output to the microcomputer 28. The microcomputer 28 that receives the start signal outputs the start signal to the microcomputer 48. The microcomputer 48 that receives the start signal executes the control routine shown in FIG. 6 every time the start signal is input. Although this control routine will be described later, in step 127 or step 137, the motor 44 is driven so that the carriage 12 moves at a predetermined speed. When the motor 44 is driven in this way, a pulse is transmitted from the rotary encoder 46 each time the shaft of the motor 44 rotates a predetermined amount as described above. Therefore, the microcomputer 48 that has input this pulse.
3 executes the control routine shown in FIG. 3 each time this pulse is input, and in step 101, increments the pulse count value p by counting the number of input pulses by 1 and ends. Therefore, by referring to the pulse count value p, the distance traveled by the carriage 12 from the predetermined position can be calculated.

FIG. 7 showing the wire detection sensor 18 portion.
When the carriage 12 further moves in the A direction from the reference position shown in (a), the wire detection sensor 16 detects the position of the first wire 10 as shown in FIG. 7 (b). The wire detection sensor 16 that has detected the position of the wire 10 outputs a detection signal to the microcomputer 48 as described above. The microcomputer 48 that receives the detection signal from the wire detection sensor 16 in this manner executes the control routine shown in FIG. 4 every time the detection signal is input. That is, the variable n is incremented by 1 in step 103 of FIG. When the control routine shown in FIG. 4 is first executed, 0 is set in the variable n. Therefore,
A value corresponding to the number of detected wires is substituted for the variable n. At step 105, the pulse count value P described above as the position P _n is set to the microcomputer 4 shown in Table 1.
The data is stored in the area corresponding to the variable n in the RAM table in FIG.

[0023]

[Table 1]

Note that P _n (P ₁ , P ₂ , P ₃ , ...)
Is the right end position of the wire 10 on the paper surface, as shown in FIG.

In step 107, it is determined whether or not a pulse is input from the rotary encoder 46. If a pulse is input, the variable k is incremented by 1 in step 109.

In step 111, the carriage 12 is further moved from the state shown in FIG.
It is determined whether or not the light receiving element of No. 6 does not receive the light reflected from the wire 10, that is, the wire detection sensor 16 does not output a detection signal.
If it is not in the non-light-receiving state, the process returns to step 107 and the above processing (step 107 to step 11) is performed.
Repeat 1).

On the other hand, when the carriage 12 is further moved from the state shown in FIG. 7C and the wire detection sensor 16 is in the non-light receiving state, the diameter R _n of the wire 10 is calculated in step 113. , The diameter R calculated in step 115
The _n and stored in the area corresponding to the variable n of the table,
This routine ends.

Here, the calculation process of the diameter R _n is performed as follows. That is, as described above, while the light reflected from the wire 10 is being received, the number of pulses from the rotary encoder 46 is counted, and this count value is assigned to the variable k. Therefore, the count value assigned to the variable k and the rotary encoder 4
The diameter R _n can be obtained by multiplying the distance traveled by the carriage 12 every time a pulse is input from 6. In the case where Motoma' diameter R _n is previously reset the variable k.

When the dolly 12 moves further from the state shown in FIG. 7C, this time, as shown in FIG. 7D, the wire detection sensor 18 becomes a light receiving state in which the reflected light from the wire 10 is received. Become. When the light receiving state is set in this way, the detection signal is output to the microcomputer 48 as described above. The microcomputer 48 that receives the detection signal from the wire detection sensor 18 executes the control routine shown in FIG. 5 every time the detection signal is input. That is,
In step 117 of FIG. 5, the variable m indicating the number of times the wire detection sensor 18 is in the light receiving state is incremented by 1. Note that the variable m is set to 0 when the control routine shown in FIG. 5 is first executed.

At step 119, it is determined whether the variable m is 1. As shown in FIG. 7D, when the wire detection sensor 18 is in the first light receiving state, m is 1, so in step 121, the wire detection sensor 18 is detected.
Substituting 1 indicating the first light receiving state into the flag F for discriminating whether or not the first light receiving state receives the reflected light from the wire 10, the present routine is ended. If the light receiving state is not the first, the flag F
Is assigned 0. If the variable m is not 1 in step 119, this routine ends.

Next, a control routine (see FIG. 6) which is executed each time a start signal is inputted from the microcomputer 28.
Will be explained.

In step 123, the wire 10 is placed at the position.
A variable t representing the number of times the constant length holding claw 22 is positioned is set to 1 ink.
To reset. The control routine shown in FIG.
Is executed, the variable t is set to 0.
You. Whether 1 is assigned to the variable t in step 125
Determine whether or not. When 1 is assigned to the variable t
Is the number of times the fixed-length holding claw 22 is positioned at the wire 10 position.
If the number is 1, then in step 127 the comparison
Fast speed V₁So that the carriage 12 can be moved by the motor 44
Is driven, and 1 is assigned to the flag F in step 129.
Whether or not the flag F is set to 1
Set to standby state. As described above, as shown in FIG.
The wire detection sensor 18 is in the first light receiving state.
In this case, 1 is assigned to the flag F.
Becomes positive in step 129, and step 131
Therefore, for accurate positioning, speed V₁Slower speed V
₂The motor 44 is driven so that the carriage 12 moves with
At Step 133, the distance [R₁/ 2 + L] low
The number of pulses from the tally encoder 46 can be counted.
The truck 12 is₁/ 2 + L Determine whether or not
Refuse. Dolly 12 is R ₁If you move / 2 + L,
At step 135, stop the movement of the dolly 12,
End If the carriage 12 stops moving,
The microcomputer 48 sends a stop signal to the microcomputer.
Output to the computer 28.

Here, L and R ₁ will be described. FIG. 7 (e)
As shown in, L is the distance from the position of the light receiving element of the wire detection sensor 18 to the center position of the claw portion of the fixed length holding claw 22. Also, R ₁ is the diameter of the initial wire 10. Therefore, after 1 is substituted into the flag F, that is, when the carriage 12 moves the distance L from the position shown in FIG. 7D, the first right end of the wire 10 on the paper surface or the center of the claw portion of the constant-length holding claw 22. It is located at the position corresponding to the position. Further, when the wire 10 moves R _{1/2, the} holding claw 2 with a constant length 2
The center position of the first wire 10 is located at the center position of the second claw portion.

In step 135, when the movement of the carriage 12 is stopped and a stop signal is output to the microcomputer 28, the microcomputer 28 executes a frequency detection processing routine (FIG. 8) described later each time the stop signal is input. Run. Further, the personal computer 50 executes a tension calculation processing routine (FIG. 9) for the wire 10.
When these processes are completed, the wire detection sensors 16 and 18 continuously detect the wire 10 again, and the control to position the fixed length holding claw 22 at the detected wire 10 position is executed. Therefore, the start key is turned on. To be done. As described above, when the start key is turned on and the start signal is input, the microcomputer 48 shown in FIG.
The control routine shown in is executed.

As described above, when steps 123 and 125 are executed, a value other than 1 is substituted for the variable t this time, so that a negative determination is made in step 125. In this case, in step 137, the speed is determined. Carriage 1 with V ₂
2 is moved, and in step 139, it is determined whether or not the carriage 12 has moved to the position P _{n (n = t)} fetched from the table, and when it has moved to the position P _{n (n = t)} , In step 141, it is judged whether or not the carriage 12 has further moved R _{n (n = t)} / 2, and when the carriage 12 has moved R _{n (n = t)} / 2,
Go to step 135. As a result, the carriage 12 is positioned at the center position of the n-th wire 10 at the center position of the fixed-length holding claw 22.

Next, the frequency detection processing routine (FIG. 8) executed by the microcomputer 28 each time a stop signal is input from the microcomputer 48 will be described.

As described above, the microcomputer 4
When the stop signal is input from 8, the center position of the fixed-length holding claw 22 is located at the center position of the wire 10, and in step 143, as shown in FIG. To hold the wire 10. In step 145, the wire 10 is struck by rapidly expanding and contracting the striking device 24 in the C direction,
Vibrates. In step 147, the frequency detection sensor 2
The vibration frequency of the wire 10 vibrating from 6 is detected. The detected frequency is amplified by the amplifier 40 and taken into the RAM 34. Then, in step 149, the frequency taken in the RAM 34 is output to the personal computer 50.

The personal computer 50 thus inputting the frequency executes the control routine shown in FIG. 9 every time the frequency is input. That is, step 151
Then, the frequency is fetched, and in step 153, an arithmetic expression ((1) which will be described later in detail) showing the relationship between the frequency and the tension is fetched. In step 155, wire 1 from equation (1)
Calculate the tension of 0.

[Equation 1] T = A · l ² · f ² · m + C (1) where T is the tension [N] of the wire 10 and l is the distance between the claw portions [m] at both ends of the fixed length holding claw 22. , F is the measured frequency [Hz], m is the mass of the wire 10 per unit length, and A and C are proportional constants and constants obtained as described later.

Next, the arithmetic expression will be described. This arithmetic expression is
It is determined as follows using the sample wire 10 manufactured so that the shape, the weaving method, the finished outer shape, etc. are the same as those of the plurality of arranged wires 10.

That is, as shown in FIG. 11, the sample wire 10 is cut and one of the cut sample wires 1 is cut.
One end of 0a and the other end of the other sample wire 10b are fixed by heavy clamps 52 and 54, respectively. That is, each of the heavy clamps 52 and 54 is composed of a moving member 58 that moves in the D direction by a fixed member 56 and a hydraulic cylinder 60. The fixed member 56 and the moving member 58 sandwich the sample wire 10 between them and the hydraulic cylinder. The moving member 58 is moved in the D direction by 60 to fix the sample wire 10.

The other end of the cut sample wire 10a and the other end of the other sample wire 10b are tied to keys 78 and 80 connected to the pull load cell 72.

Further, one of the cut sample wires 10
a is a roller 64, 68 having a fixed position and a roller 66 having a variable position, which constitutes the tension generator 62.
The roller 66 is wound as shown in FIG. 1, and the roller 66 is moved in the upward direction of the paper surface by the moving means 70, whereby tension can be generated in the sample wire 10.

The tension generated in the sample wire 10 is
It is reflected in the electric resistance of the tensile load cell 72, and this electric resistance value is converted into a voltage by the load cell amplifier 74 and input to the meter 76. The meter 76 calculates the tension of the sample wire 10 by converting the voltage input from the load cell amplifier 74 into the tension of the sample wire 10, and can display it on a display unit (not shown).

Then, the roller 66 is moved by using the moving means 70.
Is moved to generate a plurality of different tensions on the sample wire 10, and each time a plurality of different tensions are generated on the sample wire 10, a plurality of different tensions are obtained by the meter 76 and the frequency is measured using the wire tension measuring device described above. Sample.

Since a plurality of tensions and frequencies are obtained in this way, the personal computer 50 creates a graph of the square of tensions and frequencies from the obtained tensions and frequencies, finds a regression equation, and calculates the regression equation. From the slope, Y-intercept, and already known data (l, m), constants A and C
Then, the above equation (1) is obtained.

As described above, according to this embodiment, since the carriage 12 can be moved to measure the tension of the wires 10, a plurality of wires 10 can be continuously measured by this device. .

Further, in the present embodiment, since the trolley 12 is moved to measure the tension of the wire 10, there is no interference for each mechanism necessary for measuring a plurality of wires unlike the conventional wire measuring device. . In addition, even if the existing wire manufacturing line has a space through which the wire measuring device according to the present embodiment passes, the tension of the wire can be measured without changing the path of the wire. Moreover, even when the size of the wire is changed, the wire can be passed through without being aware of the wire measuring device.

Further, the sensor system of the wire measuring device according to this embodiment does not need to be mechanically adjusted even if the wire diameter changes.

Also, since there is no contact except for the part that holds the wire at a constant length and the striking part, there is little change over time,
Further, even if an abnormally high tension is applied, the wire measuring device will not be damaged.

In addition, the frequency of the wire is directly detected,
Since the tension value is calculated based on that, there is little error.

Further, one for one sample wire
It is possible to obtain tensions of multiple wires while maintaining the measurement accuracy by performing the process of calculating the calculation formula for each time, and the constants and measurement conditions (wire shape, etc.) found when the calculation formula was calculated. Is stored in memory,
When measuring the tension of the wire under the same conditions, it is possible to save the trouble of re-input by calling it.

In the embodiment described above, the wire detection sensor, the striking device, and the vibration frequency detection sensor are attached to the dolly, but the present invention is not limited to this, and the wire is arranged in the area where the wire is arranged. While providing the frequency detection sensor, the wire detection sensor and the striking device are conveyed by the conveying means, the striking device is positioned based on the detection of the wire by the wire detection sensor as described above, and the striking device is positioned to strike the wire. Alternatively, the vibration may be caused to occur, the vibration frequency may be detected by the vibration frequency detection sensor, and the tension of the wire may be obtained as described above. In this case, the frequency detection sensor may also be positioned based on the wire detection by the wire detection sensor.

In the above-described embodiment, the wire detection sensor detects and positions the wires regardless of whether or not the plurality of wires are arranged at regular intervals. When they are arranged at a constant interval, a sequencer may be used instead of the microcomputer 48 to perform positioning as described above.

Further, in the above-described embodiment, the arithmetic expression (1) is stored, but the present invention is not limited to this, and data storing sample values of frequency and tension is stored. The table may be stored and the tension corresponding to the frequency measured by the complementary method may be obtained. A graph showing the relationship between frequency and tension may be stored as a map, and the measured frequency and map may be stored. You may make it obtain | require tension from.

[0055]

As described above, according to the invention of claim 1, the detecting means and the vibrating means are movable, and the vibrating means is positioned at the wire position detected by the detecting means to vibrate the wire. Since the tension of the wire is calculated based on the relationship between the vibration frequency and the vibration frequency generated in advance and the tension, the tension of a plurality of wires is non-contact except for the portion that vibrates the wire, and the tension of a plurality of wires with a simple configuration. It has an effect that it can measure continuously.

According to a second aspect of the invention, the detecting means, the vibrating means, and the measuring means are provided on the carriage. When the detecting means detects a wire while moving the carriage, the vibrating means and the measuring means are located at the wire position. Vibrate the wire, measure the frequency generated by this, and calculate the tension of the wire based on the measured frequency and the relationship between the frequency and the tension stored in advance and the wire vibrates. There is an effect that the tension of a plurality of wires can be continuously measured with a simple structure, except for the portion to be contacted, which is non-contact.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an appearance of a wire measuring device according to the present embodiment.

FIG. 2 is a block diagram showing a control system of the wire measuring device according to the present embodiment.

FIG. 3 is a flowchart showing a control routine executed each time a pulse transmitted from a rotary coder is input.

FIG. 4 is a flowchart showing a control routine executed every time the wire detection sensor detects a wire.

FIG. 5 is a flowchart showing a control routine executed every time another wire detection sensor detects a wire.

FIG. 6 is a flowchart showing a control routine executed each time a start signal is input.

FIG. 7 is an explanatory diagram showing the progress of the positioning process of the wire measuring device of the present embodiment.

FIG. 8 is a flowchart showing a vibration frequency detection processing routine.

FIG. 9 is a flowchart showing a processing routine for calculating a wire tension.

FIG. 10 is a schematic view when a wire is held by a fixed-length holding claw.

FIG. 11 is an explanatory diagram showing a configuration for creating an arithmetic expression indicating a relationship between a frequency and a tension.

[Explanation of symbols]

 10 wire 12 bogie 16 and 18 wire detection sensor 22 constant length holding claw 24 striking device 26 frequency detection sensor 28 and 48 microcomputer 42L front left wheel 42R front right wheel 44 motor 46 rotary encoder 50 personal computer

Claims (2)

[Claims] 1. A movable detecting means for detecting a wire position, a movable vibrating means for vibrating the wire, a measuring means for measuring the frequency of the wire, and a relationship between the frequency of the wire and the tension of the wire. Is stored in advance, moving means for moving the detecting means and the vibrating means, moving the detecting means and the vibrating means, and when the detecting means detects the wire, the detecting means detects the wire. The moving means is controlled so that the vibrating means is positioned at the wire position, the vibrating means is controlled so that the wire is vibrated at the wire position, and the frequency and the memory measured by the measuring means are stored. A wire tension measuring device, comprising: calculation control means for calculating the tension of the wire based on the relationship stored in the means. 2. A detecting means for detecting a wire position, a vibrating means for vibrating the wire, a measuring means for measuring a frequency of the wire, and a storage means for preliminarily storing a relationship between the frequency of the wire and the tension of the wire. A trolley provided with the detection means, the vibration means, and the measurement means, a moving means for moving the trolley, and the detection means when the trolley is moved and the detection means detects the wire. The moving means is controlled so that the vibrating means and the measuring means are located at the wire position detected by the vibrating means, the vibrating means is controlled so that the wire vibrates at the wire position, and the vibrating means vibrates. The measuring means is controlled so that the frequency of the wire is measured, and the frequency measured by the measuring means and the storage means are stored. A wire tension measuring device comprising: a calculation control unit that calculates the tension of the wire based on the stored relationship.