JPH06281417A - Method for measuring height and deviation of trolley line - Google Patents

Abstract

PURPOSE:To easily and exactly measure the height and deviation of the trolley line in a non-contact manner by using a laser distance sensor. CONSTITUTION:A laser distance sensor 1 is started to move to the right on a track rail 5 when a start switch 8 is pressed, and the sensor 1 starts the measurement of the height when it is brought into contact with a limit switch 6 on the left. A signal processor 2 inputs the detected signal and converts it into the measured value of the height by a detecting circuit, and writes it in a storage device. The sensor 1 moves to the right on the rail 5 while measuring the height to the object to be measured at a constant speed and at constant interval, and when the sensor is brought into contact with the switch 6 on the right, the measurement of the height is finished. At the same time, the minimum measured value which corresponds to the trolley height among the measured values written in the storage device by the computing circuit of the processor 2 is detected, and the deviation of the trolley line is calculated from the position of the minimum value occupied among the total measured values and the distance of movement of the sensor. The height and deviation of the troley line is numerically indicated or outputted in print by the indicating circuit of the processor 2.

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 / deviation of a trolley wire of an electric railway installed to supply electric power to an electric railway.

[0002]

2. Description of the Related Art A method for measuring the erection height / deviation of a trolley wire is performed by using a height deviation measuring gauge rod.
In this method, the measurer carries a gauge rod about 2.5 m long and weighs about 10 kg, stands on the track, and extends the rod for about 5 m.
Since the gauge is pressed against the trolley wire at the height of the bar to read the height scale of the bar and the gauge graduation for measuring the deviation, there are problems such as inaccurate measurement, and the new lightweight and accurate trolley wire There is a demand for a method capable of measuring the height and the deviation of the.

[0003]

As described above, the conventional method for measuring the height and displacement of the trolley wire using the gauge rod is not easy to carry because the gauge rod is long and heavy. Due to measurement error due to deflection, inclination, pressing force, etc. of the rod and reading error of height scale, gauge scale for measuring deviation (reading error of gauge scale for measuring deviation at high places), etc. There is a problem in that the height and the deviation are considerably measured.

The present invention has been made in view of the above points, and an object thereof is to measure a distance to a measuring object by detecting a phase difference between laser irradiation light and reflected light from the measuring object. Another object of the present invention is to provide a method for easily and accurately measuring the height / deviation of a trolley wire by using a laser distance sensor capable of contactlessly.

[0005]

In order to solve the above-mentioned problems, the 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, measure continuously without contact in the direction perpendicular to the rail, 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. It is a method to obtain the deviation from the position and the center position of the orbit.

[0006]

[Operation] While irradiating the laser beam whose intensity is modulated with a high frequency from the laser distance sensor directly toward the object to be measured,
The reflected light is received and the phase difference is detected. When this laser distance sensor is moved in the direction perpendicular to the rail, when it is moved in the direction perpendicular to the track, all equipment on the track within the measurement range of the sensor is detected, but the trolley wire is installed at the lowest position on the track. The height of the trolley wire can be measured by obtaining the lowest value from the height measurement values.
Further, by detecting the position of the laser distance sensor at the time of detecting the object to be measured, the deviation of the trolley wire can be measured from the position occupied by the minimum height measurement value. In addition, by detecting the minimum value of 2 at the overlap point of the simple overhead line, 2 at the general point of the twin simple overhead line, and 4 at the overlap point by the same method, the trolley wire at each point is detected. The height and excursion of the can be measured. When measuring distances and displacements without contact, distance meters using eddy current, ultrasonic waves, and semiconductor lasers are used, but the maximum measurement length of these distance meters is 2
It was about m and 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 measurement object by detecting the phase difference between the laser irradiation light and the reflected light from the measurement object. The measurement range is 3 to 10 m and the resolution is 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 an explanatory view of an embodiment of a method for measuring the height and deviation of a trolley wire of the present invention, in which 1 is a laser distance sensor, 2 is a signal processor, 3 is a motor 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, switch the measurement mode switch 7 of the signal processor 2 according to the equipment status of the trolley wire 10 at the measurement location (general location of simple overhead line, overlap location or general location of twin simple overhead line, overlap location). Set the measurement mode. Next, by pressing the start switch 8 of the signal processor 2, the laser distance sensor 1 installed on the slide unit 4 is moved from the left end to the right on the track rail 5 by the operation of the motor driver 3. Start. At the same time, the contents written in the storage device of the signal processor 2 are cleared.

When the limit switch 6 on the left side is contacted by the movement of the laser distance sensor 1, the laser distance sensor 1 starts height measurement, the signal processor 2 inputs the detected signal, and the height measurement is performed by the detection circuit. Convert to a value and write to storage. When the laser distance sensor 1 moves to the right on the track rail 5 while measuring the height to the object to be measured at a constant speed and at constant intervals, and comes into contact with the right limit switch 6 installed at the right end, 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 values corresponding to the trolley height from all the measured height values written in the storage device, and the minimum value occupies all the measured values. And the trolley wire deviation is calculated from the moving distance of the sensor. The height and deviation of the trolley wire thus detected are displayed numerically or printed out by the display circuit of the signal processor 2. When these processes are completed, the motor driver 3 automatically operates, the laser distance sensor 1 moves leftward on the track rail 5, and moves when it contacts the left limit switch 6 installed at the left end. Stop and prepare for the next measurement. When the measurement is performed again, the start switch 8 is pressed, and the height and the deviation of the trolley wire are measured by the same operation as described above.

[0009]

As described above, according to the present invention, the measurement of the height and deviation of the trolley wire is carried out in a non-contact manner by using the laser distance sensor. It becomes possible to accurately measure the height and deviation of the trolley wire. In addition, the weight of the measuring device can be reduced, and labor can be saved.

[Brief description of drawings]

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

[Explanation of sign]

 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

Claims (1)

[Claims] 1. A method for measuring the height and deviation of a trolley wire erected at a predetermined height above a track for supplying electric power to a railway electric vehicle, wherein a rail surface is set at a predetermined measurement position. Continuously measure the distance from the top to the trolley wire in the direction perpendicular to the rail by non-contact, and obtain the height from the measured value that minimizes the distance from the rail surface to the trolley wire,
Further, a trolley wire height / deviation measuring method for obtaining a deviation based on the position showing the minimum measured value and the orbital center position.