JP3273831B2 - Measuring method of snow thickness on railway vehicles - 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 thickness of snow adhering to underfloor equipment of a railway vehicle while a train is running.

[0002]

2. Description of the Related Art When snow falls from a vehicle, the crushed stones are thrown away and harmful to the railroads. Therefore, when there is snow on a high-speed railway, it is slowed down so that snow does not adhere. This is causing train delay. Currently, there is no method for measuring the thickness of snow adhering to underfloor equipment of a railway vehicle while a train is running, so regulations are given with a margin for safety. In order to measure the thickness of snow adhering to the underfloor equipment of a railway car while the train is running, a high-speed camera must be installed in the direction perpendicular to the track to measure the thickness of the railway car, and the railway The thickness of snow adhering to the underfloor equipment of a railway vehicle has been measured by continuously photographing the underfloor equipment and the like of the vehicle, selecting and reading an arbitrary frame from among them. However, this method requires a lot of labor and cost, and it has not been possible to measure the thickness of snow adhering to the underfloor equipment of a railway vehicle and immediately reflect the thickness in driving regulations.

[0003]

[Problems to be solved] According to the prior art,
In a state where the train is running, there is a problem that measuring the thickness of the snow attached to the underfloor equipment of the vehicle requires a lot of labor and labor. The present invention aims to solve the above-mentioned problems, and does not require much labor and cost, and reduces the thickness of snow attached to underfloor equipment of a railway vehicle while the train is running. The purpose is to provide a way to ask.

[0004]

Means for Solving the Problems The amount of snow adhering to the underfloor equipment of the vehicle is small on the side and the bottom, and is large on the front in the traveling direction. Therefore, as a scale expressing the degree of danger of falling snow, it is most useful to measure the thickness of snow attached to a surface facing the traveling direction. The present invention seeks to measure the speed of a train from the time until the next wheel cuts off the light beam after a certain wheel of the railcar to measure cuts off the light beam and the wheelbase of the known wheel, and measures the train speed. The length of the underfloor equipment to which snow adheres is obtained from the time at which the underfloor equipment to which snow adheres and the light beam are interrupted and the train speed, and the length of the underfloor equipment to which snow adheres and the known length of the underfloor equipment and the like This is a method of calculating the thickness of snow attached to underfloor equipment or the like from the difference between the two.

[0005]

[Action] Once so snow accretion can monitor at any time, except that it speeds increased to the speed limit snow adhering can reduce unnecessary creep without snow interval.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a method for measuring the thickness of snow accretion on a railway vehicle will be described. FIG. 1 is a diagram showing a state in which a light beam is set in a direction perpendicular to the line with respect to a railway vehicle to be measured, as viewed from the line direction. FIG. FIG. 3 is an output waveform when the light beam is cut off as the train advances, (a) is an output waveform when the light beam set at the height of the underfloor equipment or the like is cut off , (B) is an output waveform when the light beam set at the height of the lower part of the wheel is cut off.
Here, 1 is a light emitter, 2 is a light receiver, 3 is a light beam set at the height of underfloor equipment, 4 is a light beam set at the height of the lower part of the wheel, 5 is underfloor equipment, 6 is a wheel, 7 is The snow attached to the underfloor equipment, 8 is an output level when light is incident, and 9 is an output level when light is shielded. A light beam 3 set at the height of the underfloor equipment and a light beam 4 set at the height of the lower part of the wheel are emitted from the light emitter 1 to the light receiver 2 on the opposite side of the track. As the train progresses, the position where the underfloor equipment 5 blocks the light beam 3 set at the height of the underfloor equipment is indicated by a dotted line, and the train wheel 6 blocks the light beam 4 set at the height of the lower part of the wheel. The position of the movement is indicated by a dashed line. If there is no obstacle in the path of the light beam, the light receiver 2 outputs the output level 8 of the incoming Shako. When the light beam is cut off by the snow attached to the vehicle body or the vehicle body, the light receiver 2 outputs an output level 9 at the time of light blocking. By covering the light receiving element with a hood or using an optical filter, it is possible to provide a sufficient difference between the output level 8 when light enters and the output level 9 when light is shielded.

The time that the wheel passes through the position of the light beam is known by the lower wheel blocking the light beam. The speed of the train can be obtained from the time T from the passage of the determined wheel to the passage of the next wheel and the wheelbase of the wheel. The speed of the time t and the train snow stick to a floor equipment and floor equipment to shut off the light beam, it is possible to obtain the train traveling direction of length of the underfloor devices snow attached. By the way, since the length of the underfloor equipment in the train traveling direction is known, the difference between the length of the underfloor equipment to which snow adheres in the train traveling direction and the length of the underfloor equipment in the train traveling direction is:
The thickness of snow attached to underfloor equipment can be determined.

[0008]

According to the present invention, the work of measuring the thickness of snow adhered to the underfloor equipment of a railway vehicle, which has conventionally required a lot of labor and cost, is performed automatically and unattended during traveling. Can be measured.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a state in which a light beam is set in a direction perpendicular to a track with respect to a railway vehicle to be measured, as viewed from the track direction.

FIG. 2 is a diagram showing a state in which a light beam is interrupted as a train advances, as viewed from a direction perpendicular to the track.

3A and 3B are output waveforms when a light beam is cut off as a train travels. FIG. 3A shows an output waveform when a light beam set at the height of underfloor equipment or the like is cut off, and FIG. It is an output waveform when the light beam set to the lower height is cut off.

[Explanation of symbols]

 Reference Signs List 1 light emitter 2 light receiver 3 light beam set at the height of underfloor equipment 4 light beam set at the height of the lower part of the wheel 5 underfloor equipment 6 wheels 7 snow attached to underfloor equipment 8 output level when light enters 9 light blocking Output level

Claims (1)

(57) [Claims] 1. A method for measuring the thickness of snow adhering to underfloor equipment of a railway vehicle while a train is running, comprising: Set the beam and measure the time until the next wheel blocks the light beam after the specified wheel blocks the light beam.After the specified wheel blocks the light beam, the next wheel starts the light beam. The speed of the train is calculated from the time required to shut off the train and the known wheel axle distance, and a light beam is set at the height of the underfloor equipment, etc., in the direction perpendicular to the track to the railcar to be measured, and snow adheres The length of time that the underfloor equipment blocks the light beam is measured, and the length of the underfloor equipment to which snow adheres is determined from the time at which the underfloor equipment with snow adheres to the light beam and the train speed, and the length of the underfloor equipment with snow is measured. Equal length and known underfloor equipment etc. Snow accretion thickness measurement method of railway vehicle and obtains the thickness of the snow deposited from the difference between the length of the floor equipment like.