JP2803963B2 - Measurement method for trolley wire height and deflection - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the height and deviation of a trolley wire of a train line installed for supplying electric power of an electric railway.

[0002]

2. Description of the Related Art The measurement of the erection height and deviation of a trolley wire is performed using a height deviation measuring gauge bar. The height of the trolley wire is measured by a measuring member who carries a gauge rod of about 2.5 m in length and weighs about 10 kg, stands on orbit, and extends the rod.
It is measured by pressing a deflection measurement gauge attached to the tip of a gauge bar against a trolley wire at a height of m, and reading the height scale of the bar. The deflection of the trolley wire refers to the deviation of the trolley wire from the center of the trajectory, and is measured by reading a gauge scale at a point where the deflection measurement gauge is in contact with the trolley wire. Since this measurement method reads the height scale of the gauge bar and the gauge scale for measuring the deviation, there is a problem that it cannot be measured accurately, and the height and the deviation of the trolley wire are newly lightweight and accurately. A method that can measure is desired.

[0003]

As described above, the conventional method of measuring the height and the displacement of the trolley wire using the gauge bar is not easy because the gauge bar is long and heavy. There was no problem. In addition, measurement errors due to deflection, inclination, pressing force, etc. of the gauge bar, and reading errors of the height scale and the gauge scale for measuring the deviation (especially reading errors of the gauge scale for measuring the deviation at high altitudes), etc. However, there is a problem that a considerable error occurs in the measurement of the height and the deviation of the trolley wire.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to detect a phase difference between laser irradiation light and reflected light from a measurement object, thereby obtaining an object to be measured. Using a laser distance sensor that can measure the distance of
It is an object of the present invention to provide a method for easily and accurately measuring the height and deviation of a trolley wire without contact.

[0005]

In order to solve the above problems, a method for measuring the height and deviation of a trolley wire according to the present invention uses a laser to measure the distance from the rail surface to the trolley wire at a predetermined measurement position. Using a distance sensor, continuously measure in a direction perpendicular to the rail by non-contact, obtain the height from the measured value that minimizes the distance from the rail surface to the trolley wire, and indicate the minimum measured value. In this method, the deviation is obtained from the position of the orbit and the center position of the orbit.

[0006]

[Function] While irradiating the laser light intensity-modulated with a high frequency from the laser distance sensor directly to the measurement object above,
The reflected light is received and the phase difference is detected. Although all the facilities detected in orbit with the laser distance sensor within the measuring range of the sensor Before moving the rail perpendicular, trolley line because it is laid to the lowest position in orbit, height measurement By finding the lowest value among the values, the height of the trolley wire can be measured. Also , the lowest value of the height measurement
Distance sensor occupies between rails when detecting
The displacement of the trolley wire can be measured from the position and the orbit center position . In addition, by detecting the two lowest values at the overlapping portion of the simple overhead wire, two at the general location of the twin simple overhead wire, and four at the overlapping portion by the same method, the trolley wire at each location is detected. Height and excursion can be measured. When measuring the distance and the displacement amount in a non-contact manner, a distance meter using eddy current, ultrasonic waves, and a semiconductor laser is used. The measurement length of these distance meters is at most about 2 m. It was difficult to measure an object of about 1 cm ² . The laser distance sensor used in the present invention measures the distance to the measuring object by detecting the phase difference between the laser irradiation light and the reflected light from the measuring object, and has a measuring range of 3 to 10 m and a resolution of 3 to 10 m. Is 1 mm, the size of the object may be about 1 cm ² , and the distance to the object to be measured can be directly measured at high speed.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a schematic front view of a measuring device to which a method for measuring the height and deviation of a trolley wire according to an embodiment of the present invention is applied, where 1 is a laser distance sensor, 2 is a signal processor, and 3 is a motor. A driver, 4 is a slide unit, 5 is a track rail, 6 is a limit switch, 7 is a measurement mode switch, 8 is a start switch, 9 is a rail, and 10 is a trolley wire. First, a measurement mode is set according to the equipment status of the trolley wire 10 at the location to be measured. There are four types of measurement modes: a general location of a simple overhead wire, an overlap location, a general location of a twin simple overhead wire, and an overlap location. By switching the measurement mode switch 7 of the signal processor 2 according to the measurement location, Is set to measure the height and the deviation of the trolley wire at the location.
Next, when the start switch 8 of the signal processor 2 is pressed, the laser distance sensor 1 installed on the slide unit 4 moves the track rail 5 from the left end to the right in FIG. To the signal processor 2 at the same time .
The contents are cleared.

The laser distance sensor 1 is connected to the left limit switch.
Touches the switch 6, the laser distance sensor 1 starts height measurement.
Start. When the laser distance sensor 1 starts measuring height,
The signal processor 2 receives the signal detected by the laser distance sensor 1, converts the signal into a height measurement value by a detection circuit, and writes it to a storage device. The laser distance sensor 1 moves to the right on the track rail 5 in FIG. 1 while measuring the height to the object to be measured at a constant speed and at a constant interval, and moves to the right in FIG. , The laser distance sensor 1 stops moving and ends the height measurement. At the same time, the arithmetic circuit of the signal processor 2 detects the minimum value of the measured value corresponding to the trolley wire height by referring to all the height measured values respectively written in the storage device. The trolley line height is given by the minimum of the measured values detected. In addition, the trolley wire deviation was measured when the laser distance sensor 1 was measured while moving from the left end to the right end between two limit switches 6 attached at the same length on both sides from the center of the rail interval. the position occupied by the smallest value among the measured values is calculated by the target calculating a moving distance of the record over the distance sensor 1. The trolley wire height and deviation calculated in this way are numerically displayed or printed out by the display circuit of the signal processor 2. When these processes are completed, the motor driver 3 automatically operates, and the laser distance sensor 1 moves on the track rail 5 as shown in FIG.
When it moves to the left inside and comes into contact with the left limit switch 6 installed at the left end, the movement stops and the next measurement is prepared. When the measurement is performed again, the height of the trolley wire and the displacement are measured by the same operation as described above by pressing the start switch 8.

[0009]

As described above, according to the present invention, the measurement of the height and the displacement of the trolley wire are performed in a non-contact manner by using the laser distance sensor, so that the measurement error and the reading error are eliminated, and the present invention can be performed easily and easily. The height and deviation of the trolley wire can be measured accurately. In addition, since the weight of the measuring device can be reduced, labor can be saved.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of one embodiment of the present invention.

[Description of Signs] 1 Laser distance sensor 2 Signal processor 3 Motor driver 4 Slide unit 5 Track rail 6 Limit switch 7 Measurement mode switch 8 Start switch 9 Rail 10 Trolley wire

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ identification symbol FI G01B 21/00 G01B 21/00 S (58) Field surveyed (Int.Cl. ⁶ , DB name) G01B 11/00-11 / 30 G01B 21/00 B60M 1/28 B60L 3/00

Claims (1)

(57) [Claims] 1. A method for measuring the height and deviation of a trolley wire installed at a predetermined height above a track to supply electric power to a railway electric car, wherein a rail surface is measured at a predetermined measurement position. The distance from the top to the trolley wire is continuously measured in a non-contact manner in the direction perpendicular to the rail, and the height is determined from the measured value that minimizes the distance from the rail surface to the trolley wire,
In addition, a method for measuring the height and the displacement of the trolley wire for obtaining the displacement based on the position indicating the minimum measured value and the center position of the orbit.