JP2890266B2 - Optical trolley wire height measuring device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical trolley wire height measuring device, and more particularly, to an trolley wire height measuring device mounted on an electric inspection car, and a ground height of an overhead trolley wire during traveling. The present invention relates to an apparatus for measuring

[Background Art] An aerial trolley line (hereinafter simply referred to as a trolley line) of an electric railway is a facility for transmitting power by contacting a pantograph provided on a vehicle. The trolley wire is provided in a predetermined height range with a zigzag deviation in a direction perpendicular to the track in order to make the sliding wear of the pantograph in contact with the trolley wire uniform. Such an imaginary position of the trolley wire and its abrasion state are measured during traveling by an electric inspection vehicle, and its quality is inspected.

2 (a) and 2 (b) illustrate a conventional trolley wire height detector in an electric inspection vehicle, wherein the trolley wire 1 is biased with respect to the rail 4 within a range W based on the height H. And its height changes up and down for various reasons.
On the other hand, a pantograph 2 is provided on the roof of the inspection car 3 with insulation by an insulator 3a, and when the height of the trolley wire 1 changes as indicated by a dotted line with respect to the reference height H, the pantograph follows the same. It expands and contracts up and down. The expansion and contraction of the pantograph 2 causes the main shaft 2a at the base thereof to rotate. Therefore, the potentiometer 5a is directly connected to the main shaft 2a and the resistance change is calculated by the arithmetic unit 5b.
Is used to measure the height of the trolley wire 1 corresponding to the rotation angle of the main shaft 2a, which is a mechanical type. At the same time, the trolley wire 1 is irradiated with a laser beam from the wear measuring device 6 through the glass window 3b, and the amount of wear is measured by the reflected light. Since processing of this wear data requires trolley wire height data,
The height data is transferred from the arithmetic unit 5b to the wear measuring device 6.

[Problem to be Solved] The conventional trolley wire height detector described above has some disadvantages. That is, since a high voltage is applied to the main shaft 2a of the pantograph, insulation of the potentiometer attached thereto is a problem, and the maintenance work on the roof is dangerous. Further, since the resistance change of the potentiometer with respect to the height of the trolley wire is non-linear, it is necessary to correct it. Further, since the measurement point m (see FIG. 7A) of the wear measuring device described above and the contact point p of the pantograph 2 are separated by the distance d, it is necessary to perform alignment at the data processing stage. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described drawbacks, and has as its object to provide an optically non-contact apparatus for measuring the height of a trolley wire.

[Means for Solving the Problems] The present invention relates to a trolley wire height measuring device mounted on an electric inspection vehicle, wherein a trolley wire is formed inside the inspection vehicle in a direction obliquely upward with respect to a track direction. The projection optical system that projects slit light in the horizontal direction that covers the deviation range of the vehicle, and receives the reflected light from the trolley wire of the slit light obliquely downward at a position symmetrical to the projection optical system in the vehicle. , A light receiving optical system that outputs an image of the reflection point of the slit light, and a position corresponding to the height of the trolley line of the output image is detected
It comprises a CCD sensor and a signal processing unit for determining the height of the trolley line from the address of the pixel of the CCD sensor that has received the image.

The above light projecting optical system is composed of a light source, a slit plate which is perpendicular to the trajectory and has a horizontal slit, and a light projecting lens. In addition, the light receiving optical system condenses the reflected light of the slit light and a condensed reflected light within a vertical section with respect to the orbital direction to form an image of a reflection point. It is composed of a cylindrical lens.

Further, the slit light from the light projecting optical system irradiates the trolley wire to almost the same place as the laser beam from the trolley wire wear measuring device mounted on the electric inspection vehicle.

[Operation] In the optical trolley line height measuring apparatus according to the present invention having the above-described configuration, the slit light projected from the light projecting optical system is such that the slit forms a right angle to the trajectory and is in the horizontal direction. Since the light is projected so as to cover the deflection range of the trolley wire in an obliquely upward direction, the trolley whose height changes within this range is always irradiated with the slit light. The reflected light of the irradiated slit light is received in a diagonally downward direction by a light receiving optical system provided at a position symmetrical to the light projecting optical system. In this case, the light reflected by the trolley wire is scattered because the sliding surface is rough, and is condensed by the condenser lens of the light receiving optical system to increase the intensity. Further, the condensed light is refracted by a cylindrical lens in a cross section perpendicular to the orbital direction to form an image of a reflection point of the slit light. The position of this image changes in accordance with the change in the height of the trolley line, and the height of the trolley line is obtained by the signal processing unit from the address of the pixel of the CCD sensor that has received the image. Since the slit light from the light projecting optical system irradiates the trolley wire with almost the same spot as the laser spot of the trolley wire wear measuring device, there is no positional deviation and the two correspond exactly.

As described above, since the trolley wire height measuring apparatus of the present invention is optically performed in a non-contact manner, the insulation problem of the potentiometer used in the conventional mechanical trolley wire height detector and the danger of maintenance work are provided. This eliminates the need for correction for the non-linearity and alignment between the wear measurement point and the height measurement point.

Embodiments FIGS. 1 (a), 1 (b) and 1 (c) show an embodiment of an optical trolley wire height measuring apparatus according to the present invention, and FIG. 1 (a) shows a side view of an electric inspection vehicle. FIGS. 2B and 2C are configuration diagrams of the light projecting optical system and the light receiving optical system viewed from a cross section perpendicular to the orbit. In FIG. 1A, the light projecting optical system 7 and the light receiving optical system 8 are symmetrically arranged on both sides of a trolley wire wear measuring device 6 provided on the vehicle body 3. 1A and 1B, the light projecting optical system 7 includes a light source 7a, a slit plate 7b, and a light projecting lens 7c. The direction of the slit of the slit plate is horizontal to the track at right angles. The slit light is projected obliquely upward so as to cover the range of deviation W of the trolley wire 1. This slit light is irradiated and reflected at the point p, q or r of the trolley wire 1, 1 'or 1 "whose height changes within the deflection range W. Next, in FIGS. The light receiving optical system 8 is composed of a condenser lens 8a and a cylindrical lens 8b, and the irradiation points (or reflection points) p and q of the trolley wire.
Alternatively, the reflected light from r is condensed by a condenser lens 8a, and the collected reflected light is condensed by a cylindrical lens 8b provided before the focal point of the condenser lens in a cross section perpendicular to the orbital direction (FIG. ) Is focused) and an image of the reflection point p, q or r is formed on the CCD sensor 9 provided at the focal position. In this case, since the cylindrical lens 8b does not refract in the direction perpendicular to the orbit (FIG. (C) corresponds), the image is not sharply formed in this direction, and the image corresponds to the deflection range W of the trolley line. The position fluctuates within the range w. It is assumed that the CCD sensor 9 has an effective width corresponding to the range w.

As described above, the address of the pixel of the CCD sensor 9 that has received the image of the reflection point is input to the signal processing unit 10, and the height of the trolley line is obtained by the calculation. The correspondence between the height of the trolley wire and the address of the pixel is determined in advance for the CCD sensor 9 by calculation or actual measurement.
The height can be immediately known from the address.

[Effects of the Invention] As is clear from the above description, according to the optical trolley wire height measuring device according to the present invention, measurement can be safely performed without contact, and height data at the same location as the wear measurement point can be obtained. Therefore, there is no need for alignment with them, and this is a great effect for eliminating the drawbacks of conventional mechanical trolley wire height detectors such as potentiometer insulation problems, maintenance work difficulties, and non-linearity correction. There is something.

[Brief description of the drawings]

1 (a), 1 (b) and 1 (c) are diagrams showing the configuration of an embodiment of an optical trolley wire height measuring apparatus according to the present invention, and FIG.
FIGS. 1A and 1B are configuration diagrams of a conventional mechanical trolley wire height detector. 1,1 ', 1 "... trolley wire, 2 ... pantograph, 2a ...
... Spindle, 3 ... Electric inspection car, 3a ... Insulator, 3b ... Glass window, 4 ... Rail, 5a ... Potentiometer, 5b ... Computing device, 6 ... Trolley wire wear measuring device, 7 ... Projection optical system, 7a ... Light source, 7b ... Slit plate, 7c ... Projection lens, 8 ... Reception optical system, 8a ... Condenser lens, 8b ... Cylindrical lens, 9 ... CCD sensor, 10 .... Signal processing unit.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Kiyokatsu Kato 4-37-3-513, Maebaru-Minami, Funabashi-shi, Chiba (72) Takeshi Jimbo 540 Sogayatsu, Sogayatsu, Odawara-shi, Kanagawa Prefecture Shinta Kamata 3-6-23-403 Ota-ku (72) Inventor Yuhei Sugaya 1903 Kawashima-cho, Asahi-ku, Yokohama-shi, Kanagawa Prefecture (56) References JP-A-48-57187 (JP, A) JP-A-62-218803 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G01C 3/00-3/32 G01B 11/00-11/30

Claims (3)

(57) [Claims] In the detection of the height of an imaginary trolley line by an electric inspection vehicle, a horizontal direction is formed in the vehicle of the inspection vehicle so as to be obliquely upward with respect to a track direction and to cover a deviation range of the trolley line. A light projecting optical system for projecting the slit light, and a light reflected by the trolley wire of the slit light received obliquely downward at a position symmetrical to the light projecting optical system in the vehicle. A light receiving optical system that outputs an image of the reflection point of the CCD sensor, a CCD sensor that detects a position of the output image corresponding to the height of the trolley line, and a pixel address of the CCD sensor that receives the image. An optical trolley wire height measuring device, comprising: a signal processing unit for obtaining a trolley wire height. 2. The light projecting optical system comprises a light source, a slit plate which is perpendicular to the trajectory and has a horizontal slit, and a light projecting lens. The light receiving optical system collects the reflected light. 2. The optical system according to claim 1, comprising: a condensing lens that emits light; and a cylindrical lens that converges the collected reflected light in a cross section perpendicular to the orbital direction and forms an image of the reflection point. Trolley wire height measuring device. 3. The trolley wire is irradiated with the slit light from the light projecting optical system at substantially the same location as a laser beam of a trolley wire wear measuring device mounted on the electric inspection vehicle. The optical trolley wire height measuring device according to the above.