JP2007240298A - Device and method for measuring strung wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a strung wire measuring device which is small and easy to carry, facilitates working, and can raise measurement accuracy, and a strung wire measuring method. <P>SOLUTION: The measuring device includes a frame 2 to be positioned on rails 1a, 1b for electric railcars 50, and a laser measuring device 3 for measuring the distance from the irradiation section 17 of the measuring device 3 up to a trolley wire 4 or metallic eye fittings 6 of a pull-off arm 5. A base member 14 for supporting the measuring device 3 is arranged on the frame 2, and the base member 14 reflects the transverse tilt angles of the rails 1a, 1b. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an overhead wire measuring instrument and an overhead wire measuring method for measuring an overhead wire of a train.

2. Description of the Related Art Conventionally, an overhead wire measuring device is known that measures the height of a trolley line that a pantograph of a train contacts, the difference in height between left and right rails, and the angle of attachment of a curved drawing bracket attached to the trolley line. This overhead wire measuring instrument is provided with a measurement gauge bar and a measurement arm slidably attached to the measurement gauge bar.
When measuring with this overhead wire measuring instrument, place the measurement gauge rod on the rail, abut the measurement arm on both ends of the trolley wire or curved fitting, and mark the measurement gauge rod and measurement arm on the scale. Is visually observed. Thereby, the height with respect to the rail of a trolley wire, and the attachment angle of the curved metal fitting attached to a trolley wire can be measured (for example, refer patent document 1).
JP 58-39901 A

By the way, since the above-mentioned overhead wire measuring device measures the height from the rail to the trolley wire with the measuring gauge rod, the measuring gauge rod becomes long and the whole overhead wire measuring device becomes very large. Moreover, there is a problem that it is heavy and difficult to carry.
On the other hand, since the measurement arm attached to the measurement gauge rod is directly applied to the trolley wire, it is necessary to ensure safety.
Furthermore, since it measures by visually observing the scale marked on the measurement gauge rod and the measurement arm, there is a problem that the measurement accuracy varies.

  Therefore, the present invention provides an overhead wire measuring instrument and an overhead wire measuring method that are small and easy to carry, can be easily operated, and can improve measurement accuracy.

In order to solve the above problems, the invention described in claim 1 is provided with a pedestal positioned on a rail of a train and a laser measuring device for measuring a distance from a laser irradiation unit of the laser measuring device to an overhead line. A support surface for supporting the laser measuring device is provided on the gantry, and the support surface reflects a tilt angle in the left-right direction of the rail.
By comprising in this way, an overhead wire can be measured non-contactingly, an overhead wire measuring device can be made small and can be reduced in weight. Further, the tilt angle in the left-right direction of the rail can be reflected in the measurement.

The invention described in claim 2 is characterized in that a positioning portion capable of positioning with respect to the rail is provided on the frame.
By comprising in this way, a mount frame can be positioned, without removing from on a rail, and the distance from a rail to a laser measuring device can be kept constant.

The invention described in claim 3 replaces the inclination of the rail with the amount of displacement of the irradiation unit of the laser measuring device that irradiates the laser beam toward the overhead line from the reference position. It is characterized by measuring distance.
By setting it as such a measuring method, the distance from a rail to an overhead line can be measured easily.

According to a fourth aspect of the present invention, there is provided a pedestal positioning step of positioning a pedestal on the rail, a support step of supporting a laser measuring device on the pedestal, and irradiating laser light of the laser measuring device toward the pedestal. An irradiation step, a measurement step of measuring a distance from the laser measuring instrument to the overhead line and a tilt angle of the rail in the left-right direction, and a distance from the rail to the overhead line based on measurement data of the measurement step It is characterized by comprising an arithmetic step.
By setting it as such a measuring method, the distance from a rail to an overhead line can be measured reliably.

According to the first aspect of the present invention, the overhead wire can be measured in a non-contact manner, and the overhead wire measuring device can be reduced in size and weight. Therefore, there is an effect that the operation is easy and easy to carry.
Further, since the tilt angle in the left-right direction of the rail can be reflected in the measurement, there is an effect that it can be measured accurately.

  According to the second aspect of the present invention, the gantry can be positioned without being detached from the rail, and the distance from the rail to the laser measuring device can be kept constant. is there.

  According to the invention described in claim 3, since the distance from the rail to the overhead line can be easily measured, there is an effect that it can be measured in a short time.

  According to the invention described in claim 4, since the distance from the rail to the overhead line can be reliably measured, there is an effect that the measurement accuracy can be improved.

Next, embodiments of the present invention will be described with reference to the drawings.
In addition, the dashed-dotted line in a figure has shown the horizontal direction and the perpendicular direction.
As shown in FIGS. 1, 2 (a), and 2 (b), the overhead wire measuring device according to the embodiment of the present invention is composed of a gantry 2 and a laser measuring device 3. A frame 2 having a laser measuring device 3 attached thereto is set on 1a and 1b.
Above the laser measuring device 3, a trolley wire 4 and a curved drawing metal fitting 5 which are overhead wires are routed in a direction along the rails 1a and 1b.
The rails 1a and 1b are installed in a state where a track surface 15 which is a surface in contact with the upper surfaces 11a and 11b of the rails 1a and 1b is inclined at an inclination angle θ1 with respect to the horizontal direction.

The gantry 2 is formed by FRP, and is used to always set the laser measuring device 3 at a fixed position with respect to the rails 1a and 1b. The plate-like base member 14 has four legs 12a, 12b, 12c, One end of 12d is rotatably attached.
The legs 12a, 12b, 12c, and 12d are provided in a pair of two sets on the right side and the left side, respectively, and the legs 12a, 12b and the legs 12c, 12d are respectively placed near the other end of the pair. A member 25a having an L-shaped cross section for fixing is provided.

Aluminum brackets 37a and 37b are provided at the other ends of the legs 12a and 12b, respectively, and aluminum brackets 37c and 37d are provided at the other ends of the legs 12c and 12d, respectively.
These brackets 37a, 37b, 37c, and 37d protect the outer surface and the lower surface of the other ends of the legs 12a, 12b, 12c, and 12d.

  Further, on the lower surface of the brackets 37a, 37b, a positioning member 13a made of aluminum and having an L-shaped cross section is provided so as to be rotatable about the laying direction of the rail 1a across the legs 12a and 12b. A positioning member 13b made of aluminum and having an L-shaped cross section is provided on the lower surface of 37d so as to be able to rotate about the laying direction of the rail 1b across the legs 12c and 12d.

The positioning members 13a and 13b are for stably setting the gantry 2 on the rails 1a and 1b and always setting the laser measuring device 3 mounted on the base member 14 at the center between the rails 1a and 1b. The flat plate covers the lower surfaces of the brackets 37a, 37b, 37c, and 37d, and the inner stopper contacts the inner side surfaces 35a and 35b of the rails 1a and 1b.
Further, plate-like members 36a and 36b made of nylon resin are provided on the lower surfaces of the positioning members 13a and 13b.
The plate-like members 36a and 36b are in contact with the upper surfaces 11a and 11b of the rails 1a and 1b.

Between the leg 12a and the leg 12d, a stay 28 is provided so as to straddle both, and one end of the stay 28 is rotatably supported.
A long hole 29 is provided in the leg 12d downward from the other end of the stay 28 in the direction along the longitudinal direction of the leg 12d, and the other end of the stay 28 can slide on the long hole 29. It is supported by.
The stay 28 is for keeping the base member 14 parallel to the raceway surface 15 so that the legs 12a and 12b and the legs 12c and 12d can be opened and closed.

The laser measuring device 3 is provided with an angle meter, and measures the height of the overhead wire by irradiating the overhead wire with the laser beam and taking in the reflected light. 34 is rotatably supported via 34.
A pedestal 27 is provided below the support portion 32, and the pedestal 27 is fixed on the base member 14 of the gantry 2.
As the battery for operating the laser measuring instrument 3, six AA batteries are used. That is, in this embodiment, the laser measuring device 3 operates at DC 9V.

An irradiation unit 17 that irradiates laser light is provided at the tip of the measuring device main body 30.
On one side of the measuring instrument main body 30, a telescope 23 for accurately aiming the laser beam at the overhead line and a light 24 for making the tip of the laser beam easy to see when working at night are provided via the bracket 40. Is provided.
On the other side of the measuring instrument main body 30, a knob 33 is provided for adjusting the aim while finely adjusting the aim.
Further, a personal computer (personal computer) 9 having a calculation function is connected to the laser measuring instrument 3 so that data measured by the laser measuring instrument 3 can be calculated and managed by the personal computer 9.

The trolley line 4 supplies power to the train 50 indicated by a two-dot chain line, and is arranged so that the pantograph 51 of the train 50 comes into contact with the trolley line 4. A suspension line for suspending the trolley line 4 is disposed above the trolley line 4. 7 is provided.
One end of a wire 10 that hangs downward is attached to the suspension wire 7, and a trolley wire 4 is attached to the other end of the wire 10.
The suspension wire 7 is arranged such that the wire 10 is along the vertical direction with respect to the track surface 15.

In addition, the trolley wire 4 is provided with a curved metal fitting 5 that extends from the trolley wire 4 while curving toward the upper left direction.
The curved metal fitting 5 is used to route the trolley wire 4 in a direction along the track of the rails 1a and 1b, and an eye metal fitting 6 is provided at the end opposite to the trolley wire 4 of the curved metal fitting 5.
For safety reasons, the eye metal fitting 6 is required to be above a horizontal plane 70 that is in contact with the trolley wire 4 while being supported by a post (not shown).
Here, the distance L4 of the straight line 21 connecting the trolley wire 4 and the eye metal fitting 6 is required to be 900 mm, and the angle between the straight line 21 and the surface 22 in contact with the trolley wire 4 parallel to the track surface 15 (hereinafter referred to as a curve). The angle θ4 (referred to as the pull angle) is subject to certain restrictions depending on the size of the trajectory curve of the trolley wire 4.

In order to irradiate the laser light emitted from the irradiation unit 17 of the laser measuring instrument 3 toward the trolley wire 4 or the eye metal fitting 6, the measuring instrument main body 30 of the laser measuring instrument 3 is provided on the support 32. This can be done by tilting 34 around the center and fine-tuning with the knob 33.
Here, a surface parallel to the track surface 15 and in contact with the irradiation unit 17 is defined as a measurement level 16.

In addition, the laser measuring device 3 tilts the measuring device main body 30 to aim at the trolley wire 4 or the eye metal fitting 6, so that the measuring device main body 30 is tilted, and the angle measuring device of the laser measuring device 3 uses the angle meter from the irradiation unit 17. An angle θ2 between a line 18 connecting the trolley line 4 with a straight line and the measurement level 16 and an angle θ3 between a line 19 connecting the irradiation unit 17 to the eye metal fitting 6 with a straight line and the measurement level 16 are measured. be able to.
The inclination angle θ1 of the track surface 15 and the measurement level 16 with respect to the horizontal direction is determined by the angle meter of the laser measuring instrument 3 fixed on the base member 14 because the base member 14 is parallel to the track surface 15. It can be measured.

As shown in FIGS. 3 and 4, the laser measuring instrument 3 makes a straight line between the inclination angle θ <b> 1 of the measurement level 16 with respect to the horizontal direction, the distance L <b> 2 from the irradiation unit 17 to the trolley line 4, and the irradiation unit 17 to the trolley line 4. The angle θ2 between the line 18 connected at the point and the measurement level 16, the distance L3 from the irradiating unit 17 to the eye fitting 6, and the line 19 and the measurement level 16 connecting the irradiation unit 17 to the eye fitting 6 with a straight line. The angle θ3 is measured.
The distance h0 from the track surface 15 to the measurement level 16 is a value determined based on the size of the gantry 2. Further, the distance A between the rails 1a and 1b (between the gauges) is a value determined based on a conventional line or a main line.

  Rail cant C, which is the height difference between rail 1a and rail 1b, height H from track surface 15 to trolley wire 4, and line 20 extending in the vertical direction from irradiation unit 17 to measurement level 16 The distance d between the trolley wire 4 and the bending angle θ4 is calculated by the calculation function of the personal computer 9 based on each measurement data measured by the laser measuring device 3. Is.

Specifically, the rail cant C is a value calculated by a calculation method of C = A × tan θ1.
The height H of the trolley wire 4 is a value calculated by a calculation method of H = L2 × cos (90 ° −θ2) + h0.
The displacement d of the trolley wire 4 is a value calculated by a calculation method of d = L2 × sin (90 ° −θ2).
The bending angle θ4 is a value calculated by a calculation method of θ4 = θ5-θ2.

Here, θ5 is an angle between a line 18 connecting the irradiation unit 17 to the trolley line 4 with a straight line and a line 21 connecting the trolley line 4 and the eye metal fitting 6, and θ5 = cos ⁻¹ ((L2 ² + L4 ² −L3 ² ) / 2 × L2 × L4).
L4 is a distance between the trolley wire 4 and the wire 21 connecting the eye metal fitting 6, and is a value calculated by a calculation method of L4 ² = L2 ² + L3 ² -2 × L2 × L3 × cos (θ3-θ2) ( Hereinafter referred to as the length of the song).

Therefore, in measuring the overhead wire, first, the positioning members 13a and 13b of the gantry 2 are set on the rails 1a and 1b so as to contact the rails 1a and 1b (positioning step).
Next, the laser measuring device 3 is fixed on the base member 14 of the gantry 2 (support process).
And if it measures using the laser measuring device 3 (measurement process), the height H to the trolley wire 4 and the displacement of the trolley wire 4 by the calculation function of the personal computer 9 based on the measurement data of the laser measuring device 3 d and the bending angle θ4 are calculated (calculation step).
Thereby, an exact measurement result can be obtained without contact with the overhead wire.

Moreover, since the laser measuring device 3 can be set in a portion near the track surface 15 away from the overhead line, the platform 2 can be reduced in size.
Further, the positioning members 13a and 13b provided on the gantry 2 are brought into contact with the upper surfaces 11a and 11b of the rails 1a and 1b and the inner side surfaces 35a and 35b of the rail 1a, so that the laser measuring instrument 3 attached to the gantry 2 is provided. Since it can always be set at the center of the rails 1a and 1b, the repeatability is improved and the measurement accuracy is improved.

The stays 28 can be changed even when the distance A between the rails 1a and 1b (gauge) is changed because the positioning members 13a and 13b are rotatably provided on the legs 12a, 12b, 12c and 12d. The gantry 2 can be set on the rails 1a and 1b only by an easy operation.
In addition, the legs 12a and 12b and the legs 12c and 12d of the gantry 2 are provided so as to be openable and closable, and the laser measuring instrument 3 can be operated at DC 9 V, thereby reducing the weight of the battery for supplying power to the laser measuring instrument 3. There is an effect that can be easily carried.

Next, the case where the direction of the curved metal fitting 5 extends to the opposite side with respect to the trolley wire 4 will be described with reference to FIGS.
The suspension line 7 is disposed above the raceway surface 15, and the trolley wire 4 is attached to the lower end of the wire 10 that hangs downward from the suspension line 7. 4, a curved metal fitting 5 that extends while curving from the trolley wire 4 in the upper right direction is supported, and an eye metal fitting 6 is provided at the end opposite to the trolley wire 4 side of the curved metal fitting 5.
The eye metal fitting 6 is supported by a post (not shown).

An inclination angle θ1 of the measurement level 16 with respect to the horizontal direction by the laser measuring instrument 3, a distance L2 from the irradiation unit 17 to the trolley line 4, a line 18 connecting the irradiation unit 17 to the trolley line 4 and a measurement level 16 , The distance L3 from the irradiation unit 17 to the eye metal fitting 6, and the angle θ3 between the line 19 connecting the irradiation unit 17 to the eye metal fitting 6 with a straight line and the measurement level 16 are measured.
The distance h0 from the track surface 15 to the measurement level 16 is a value determined based on the size of the gantry 2. The distance A between the rails 1 and 1 (gauge) is a value determined based on a conventional line or a main line.

The rail cant C, the height H of the trolley wire 4 from the raceway 15, the deflection d of the trolley wire 4, and the bending angle θ 4 are based on the respective measurement data measured by the laser measuring device 3. It is calculated by the calculation function.
Specifically, the rail cant C is a value calculated by a calculation method of C = A × tan θ1.
The height H of the trolley wire 4 is a value calculated by a calculation method of H = L2 × cos (90 ° −θ2) + h0.
The displacement d of the trolley wire 4 is a value calculated by a calculation method of d = L2 × sin (90 ° −θ2).
The bending angle θ4 is a value calculated by a calculation method of θ4 = θ5− (180−θ2).

Here, θ5 is an angle between a line 18 connecting the irradiation unit 17 to the trolley line 4 with a straight line and a line 21 connecting the trolley line 4 and the eye metal fitting 6, and θ5 = cos ⁻¹ ((L2 ² + L4 ² −L3 ² ) / 2 × L2 × L4).
L4 is a bending length, and is a value calculated by a calculation method of L4 ² = L2 ² + L3 ² -2 × L2 × L3 × cos (θ3−θ2).

  Therefore, even if the direction of the extending direction of the curved metal fitting 5 is reversed left and right, or the inclination direction of the track surface 15 is reversed left and right, the height H from the track surface 15 to the trolley wire 4 and the trolley The deviation d of the line 4 and the bending angle θ4 can be accurately measured.

Next, a display example of measurement results will be described with reference to FIG.
Each value measured by the laser measuring instrument 3 is taken into the personal computer 9 and processed by the arithmetic function of the personal computer 9, and the value and the measurement result processed by the arithmetic function are displayed on the display of the personal computer 9.

On the upper part of the display, the text “Shared trunk line measuring instrument” is displayed.
In the upper left corner of the display, “Date”, “Route:”, “Section:”, “Up / Down Line:”, “Line Number:”, “Kilometer Distance”, “Column Number:”, “Curve Radius:”, Characters “Span ::” and “Music drawing type:” are displayed vertically in order, and the corresponding information is typed on the right side of each character.

Below these, the characters “track surface”, “trolley line”, and “curve fitting” are displayed in sequence in the vertical direction, and on the right side of these characters, “angle = ”And input field display, units,“ distance = ”and“ angle = ”next to“ trolley line ”, input field display, units,“ distance = ”and“ angle = ”next to“ curve fitting ” And input field display, units are displayed.
In these input fields, the inclination angle θ1 with respect to the horizontal direction of the orbital plane 15 which is measurement data from the laser measuring device 4, the distance L2 from the laser measuring device 4 to the irradiation unit 17, and the irradiation unit 17 to the trolley line 4 are indicated. The angle θ2 between the straight line 18 and the measurement level 16, the distance L3 from the irradiating unit 17 to the eye fitting 6, and the line 19 and the measurement level 16 connecting the irradiation unit 17 to the eye fitting 6 with a straight line. Is displayed as a measured value.

  On the right side where these are displayed, the characters “Rail Cant”, “Trolley Line”, and “Bending Angle” are displayed in sequence, and to the right of these characters are displayed next to “Rail Cant”. “Level difference =” and input field display, units, “Trolley line” beside “height =” and “deviation =”, input field display, units, “curvature angle” beside “angle” = ”Is displayed in the input field, and the unit is displayed. Above these, the characters “measurement results” are displayed.

In these input fields, the rail cant C, which is a measurement result calculated by the calculation function of the personal computer 9, the height H of the trolley wire 4 from the raceway surface 15, the deviation d of the trolley wire 4, and the bending angle θ4. Is displayed.
Further, on the right side of the part where the measurement result of this time is displayed, the measurement result at the time of the previous measurement is displayed correspondingly. The date of the last measurement is displayed, and the difference between the previous and current measurement results can be compared.

At the bottom of the display, corresponding to the function keys F1, F2, F3, F4, F5, F6, F7, and F8, “end”, “call”, “save”, “forward”, “return”, “next page”, “previous page” "List" is displayed.
Here, “End” is for ending the operation, “Call” is for calling the previous measurement data, and “Save” is for saving the information displayed on the display. "Forward" and "Back" are for moving the cursor on the input field displayed on the display, and "Next page" and "Previous page" are on the display stored in the personal computer 9. The information is displayed in order, and “list” is for displaying a list of measurement results on Excel.

Therefore, according to the display example of the display described above, the measurement data and the measurement result can be confirmed at a glance. Further, by displaying the previous measurement result and the current measurement result side by side, the previous measurement result and the current measurement result can be easily compared, and the deterioration with time can be confirmed.
Furthermore, since information such as measurement locations and dates can be entered, measurement management is easy.
And since it corresponds to the function keys F1, F2, F3, F4, F5, F6, F7, and F8 of the personal computer 9, the effect of improving the efficiency of the measurement work can be achieved.

  The present invention is not limited to the above-described embodiment, and the case where the gantry 2 is molded by FRP has been described, but it may be molded by aluminum, iron, and other resins.

It is a front view in the embodiment of the present invention. The stand in embodiment of this invention is shown, (a) is a top view, (b) is a front view. It is the front view which showed the measurement content in embodiment of this invention. It is the front view which showed the measurement content in embodiment of this invention. It is the front view which showed the other measurement content in embodiment of this invention. It is the front view which showed the other measurement content in embodiment of this invention. It is a figure which shows the example of a display of the measurement result displayed on the display of the personal computer in embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a ... Rail, 1b ... Rail, 2 ... Mount, 3 ... Laser measuring instrument, 4 ... Trolley wire (overhead wire), 5 ... Curved fitting (overhead wire), 6 ... Eye fitting (overhead wire), 9 ... Personal computer (personal computer) , 13a ... positioning member, 13b ... positioning member, 14 ... base member (support surface), 17 ... irradiation part, 50 ... train

Claims (4)

  A pedestal positioned on the rail of the train, and a laser measuring device for measuring the distance from the irradiation part of the laser measuring instrument to the overhead line are provided, and a support surface for supporting the laser measuring instrument is provided on the pedestal, The overhead wire measuring instrument characterized in that the support surface reflects an inclination angle in the left-right direction of the rail.   The overhead wire measuring instrument according to claim 1, wherein a positioning portion capable of positioning with respect to the rail is provided on the platform.   The tilt of the rail is replaced with the amount of displacement of the irradiation part of the laser measuring device that emits laser light toward the overhead line from the reference position, and the distance from the rail to the overhead line is measured based on the amount of displacement. Overhead wire measurement method. A pedestal positioning step for positioning a pedestal on the rail, a support step for supporting a laser measuring device on the pedestal, an irradiation step for irradiating laser light of the laser measuring device toward the pedestal, and the laser measuring device A measuring step for measuring the distance from the irradiation unit to the overhead line and the inclination angle of the rail in the left-right direction, and a calculation step for calculating the distance from the rail to the overhead line based on the measurement data of the measuring step The overhead wire measuring method according to claim 3.

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