JP3903364B2 - Trolley wire deflection measuring device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a trolley wire displacement measuring apparatus that continuously measures a displacement in a horizontal direction of a trolley wire in a railway facility without contact.
[0002]
[Prior art]
The trolley line is a power supply line that contacts the pantograph of the train and supplies power to the train. Here, the displacement of the trolley wire refers to the distance in the left-right direction of the trolley wire from the center of the rail. In order to make the pantograph wear uniform, the trolley wire is provided so as to have a zigzag deviation of about 250 mm at the maximum at each portion supporting the pantograph. Since the maximum deviation is specified, it is necessary to check and confirm that the deviation is within the specified value.
2. Description of the Related Art Conventionally, as a trolley wire deviation measuring device, for example, a device described in Japanese Patent Laid-Open No. 7-120227 is known. In this method, the trolley wire is illuminated with a sodium lamp, and the reflected light is received by a CCD line sensor camera to measure the deviation. In this case, since a plurality of CCD cameras are used and a focusing mechanism is required, the apparatus is complicated, large and heavy, and expensive.
[0003]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a trolley wire deflection measuring device that has a relatively simple mechanism, is small and lightweight, and can be obtained at low cost.
[0004]
[Means for Solving the Problems]
In the present invention, in order to solve the above-described problem, the trolley line T extends substantially horizontally in the direction of deviation of the trolley line T to be measured, and the trolley line T is single in a range appropriately wider than the maximum deviation of the trolley line T to be measured. The light source device 1 is arranged below the trolley line T so that the wavelength light can be projected, and the trolley line T extends so as to extend substantially parallel to the light source device 1 and receive reflected light from the trolley line T. The light receiving device 2 is disposed below the light receiving device 2, and the control device 12 calculates and outputs the deviation of the trolley wire T from the light receiving position of the reflected light received by the light receiving device 2. In the light receiving device 2, a large number of light receiving elements 8 that output a voltage corresponding to the amount of received light are arranged almost horizontally at a predetermined interval, and between the light receiving elements 8, the light receiving element rows A plurality of partition plates 9 are provided in a substantially vertical direction. The control device 12 is configured to output the position of the light receiving element 8 that outputs a high voltage equal to or higher than a predetermined value as the displacement of the trolley line T. In this case, a focusing mechanism and an expensive CCD camera are not required. The partition plate 9 blocks the incidence of light from the oblique left and right directions, and only the light receiving element 8 directly below the trolley line T receives the reflected light from the trolley line T.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described with reference to the drawings. 1 is a schematic explanatory view of a trolley wire deflection measuring device, FIG. 2 is a plan view of a light source device, FIG. 3 is a side view thereof, FIG. 4 is a plan view of a light receiving device, FIG. These are explanatory drawings of the deviation calculation method.
[0006]
In FIG. 1, a light source device 1 and a light receiving device 2 that extend substantially horizontally in a direction orthogonal to the trolley line T that is a deviation measurement target are arranged.
[0007]
As shown in FIGS. 2 and 3, the light source device 1 is configured such that a sodium lamp 4 is accommodated in an elongated box-shaped case 3 whose one surface is open, and a reflecting plate 5 is provided behind the sodium lamp 4. A cylindrical lens 6 is attached to the open portion of the case 3, and the lens 6 converges the light of the sodium lamp 4 (prevents diffusion) and projects the light onto the trolley line T with a limited range. In FIG. 1, R1 is a light beam irradiated from the light source device 1 to the trolley line T. The light source device 1 is arranged such that the light projection angle is inclined by an angle θ1 with respect to the vertical direction.
[0008]
As shown in FIGS. 4 and 5, the light-receiving device 2 is formed by arranging a large number of light-receiving elements 8 at intervals of, for example, 5 mm in an elongated box-shaped case 7 whose one surface is open. A plurality of partition plates 9 are provided between the light receiving elements 8 in parallel to each other and in a substantially vertical direction with respect to the 8 rows of light receiving elements. Due to the partition plate 9, only light rays parallel to the light reach the light receiving element 8 and are not easily affected by other light. An optical filter 10 that transmits only light having a wavelength corresponding to the light from the sodium lamp 4 is disposed in front of the light receiving element 8, and a cylindrical lens 11 is provided on the front surface thereof. By the cylindrical lens 11, the reflected light from the trolley line T is converged and received by the light receiving element 8. The light receiving element 8 outputs a voltage corresponding to the amount of received light. The light receiving device 2 is arranged such that the light receiving angle is inclined at an angle of θ2 on the side opposite to the inclination of the light source device 1. In FIG. 1, R2 is a light beam reflected from the trolley line T.
[0009]
The light from the sodium lamp 4 is projected from the light source device 1 toward the trolley line T, the reflected light is received by the light receiving device 2, and the position of the reflected light is calculated by the control device 12 and output. That is, the reflected light from the trolley line T is most incident on the light receiving element 8 immediately below it, so that the output voltage of the light receiving element 8 is higher than that of the other light receiving elements 8. The other light receiving element 8 may receive the reflected light from the member of the support or the tunnel wall surface, but the output voltage is low because the amount of received light is small. As shown in FIG. 6, for example, a slice level L is provided for the output voltages of the first to twentieth light receiving elements 8, and the position of the light receiving element 8 that outputs a voltage higher than this level L is set to the trolley. Output as deviation of line T.
[0010]
Since there are a plurality of trolley lines T depending on the type of overhead line, all the positions of the light receiving elements 8 having an output voltage equal to or higher than the slice level L are regarded as deviations of the trolley line and are output. Depending on the thickness of the trolley line T and the arrangement interval of the light receiving elements 8, a plurality of continuous light receiving elements 8 may receive the reflected light of the trolley line T with one trolley line T1 (FIG. 6). In this case, the center value of the displacement positions of the plurality of light receiving elements 8 that have received light is output as the displacement of the trolley line T1. Therefore, the deviation of the plurality of trolley wires T can be measured simultaneously.
[0011]
The height position of the trolley line T is regulated within a range of 4,800 mm to 5,200 mm from the rail upper surface, for example. Therefore, by adjusting the angles θ1 and θ2, the range of the light beams R1 and R2 is made to coincide with the height fluctuation range of the trolley line T. Thereby, the light receiving field coincides with the range of vertical displacement of the trolley line. In this case, the reflected light from other members below the height of 4,800 mm and above 5,200 mm is out of the light receiving range, so that the measurement is reliable.
[0012]
Thus, for example, the displacement measuring device is mounted on a work vehicle, and the displacement of the trolley wire T is continuously measured while traveling on the track. In addition, it can replace with a sodium lamp and the light source which light-emits other single wavelength light can be used.
[0013]
【The invention's effect】
As described above, in the present invention, light is projected from the light source device 1 that extends to the deflection range of the trolley line T to the trolley line T, and the reflected light is received by the light receiving device 2 that also extends to the deflection range of the trolley line T. Since the displacement is measured at the position of the light receiving element 8 that has received light, a focusing mechanism and an expensive CCD camera are not required. The partition plate 9 blocks the incidence of reflected light from other diagonal directions from other members, and only the light receiving element 8 directly below the trolley line T receives the reflected light from the trolley line T, so that the measurement is ensured. It has the effect of becoming.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory diagram of a trolley wire deflection measuring device.
FIG. 2 is a plan view of the light source device.
FIG. 3 is a side view of the light source device.
FIG. 4 is a plan view of the light receiving device.
FIG. 5 is a cross-sectional view of a light receiving device.
FIG. 6 is an explanatory diagram of a deviation calculation method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Light source device 2 Light receiving device 3 Case 4 Sodium lamp 5 Reflector 6 Cylindrical lens 7 Case 8 Light receiving element 9 Partition plate 10 Optical filter 11 Cylindrical lens 12 Controller T Trolley line

Claims (6)

Below the trolley line, it extends almost horizontally in the direction of deviation of the trolley line to be measured, and is arranged so that single wavelength light can be projected to the trolley line in a range that is appropriately wider than the maximum deviation of the trolley line to be measured A light source device,
A light receiving device that extends horizontally in parallel with the light source device below the trolley line and is arranged so as to receive reflected light from the trolley line;
A control device that calculates and outputs the deviation of the trolley wire from the light receiving position of the reflected light received by the light receiving device;
The light receiving device includes a plurality of light receiving elements arranged in a row substantially horizontally in the extending direction thereof and outputting a voltage corresponding to the amount of received light, and a light receiving element array parallel to each other between the light receiving elements. A plurality of partition plates provided in a substantially vertical direction,
Each of the light receiving elements is disposed between the partition plates so as to receive only the reflected light of a predetermined angle incident through the partition plates among the reflected light,
The control device is configured to output a position of a light receiving element that outputs a high voltage equal to or higher than a predetermined value as a displacement of the trolley wire. The displacement of the trolley wire according to claim 1, wherein the light source device comprises a light source lamp and a cylindrical lens for converging light from the light source lamp and projecting the light onto the trolley wire. measuring device. The trolley wire deflection measuring device according to claim 1, wherein the light receiving device includes a cylindrical lens for converging reflected light from the trolley wire and projecting the light to the light receiving element. The trolley wire deflection measuring device according to claim 1, wherein the light source device includes a sodium lamp. The light source device is arranged such that a light projecting angle thereof is inclined by a predetermined angle with respect to a vertical direction, and the light receiving device is configured such that the light receiving angle thereof is inclined at an equal angle to the side opposite to the inclination of the light source device. 2. The trolley wire displacement measuring device according to claim 1, wherein the light receiving field of view is configured to coincide with a range of vertical displacement of the trolley wire. The trolley wire displacement measuring device according to claim 1, wherein the light receiving device includes an optical filter that transmits only light having a wavelength emitted by the light source device.

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