JPS596361B2 - Trolley wire deflection measuring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a trolley wire deviation measuring device for measuring the amount of deviation of a trolley wire installed along a track for supplying power to an electric railway.

[Prior art]

As shown in Fig. 1, a trolley wire 1 for power supply in electric railways is usually made of hard copper wire with a circular cross section, and is supported by a utility pole 2 erected along the track. It is suspended and supported by a suspension line and a hanger hanging from the suspension line.

Then, the pantograph installed on the roof of the train 3 comes into contact with a rice grip 4 formed of a softer copper plate than the normal trolley wire 1, and supplies the required electric power to the train 3.
At this time, so that the entire surface of the waste plate 4 is worn uniformly,
The trolley wire 1 is installed so as to meander (hereinafter referred to as deviation) within a predetermined range along the traveling direction of the electric train 3. Further, the trolley wire 1 is suspended in each predetermined section, and the terminals of adjacent trolley wires 1 are installed in parallel so that they overlap by a required length. Furthermore, in areas where the train 3 is running at a high density, a plurality of trolley wires 1 are installed in parallel at predetermined intervals in order to supply the necessary power. Conventionally, a trolley wire deflection measuring device for measuring the amount of deflection of the trolley wire 1 has been used.
Light is illuminated from the soil, and the light image obtained from the gold mine area is captured by a special photoelectric conversion element such as a television camera or line scanner fixed to the vehicle, and the light image is captured by the trolley. Line 1 was detected and measured based on a video signal obtained from a television camera or a special photoelectric conversion element.

When measuring the trolley line deviation using such a trolley line deviation measurement device in bright daytime, the trolley line 1
It is necessary to create a large contrast difference between the natural light incident from the periphery of the trolley and the light reflected from the sliding surface of the trolley line 1. To do this, approximately 1 trolley line 1 exists.
It is necessary to illuminate a wide area of about 1,000 pilgrims with light several tens of times stronger than natural light, but this is virtually impossible. If a normal lighting device were used to illuminate the above wide area, one trolley line 1 made up of daytime natural light would be illuminated.
There is not much difference in contrast between the background of the image and the light image reflected from the sliding surface of the trolley line 1, and the sliding surface of the trolley line 1 can be detected with high sensitivity and the amount of deviation can be measured with high precision. That was impossible. For this reason, in the past, the amount of deviation of the trolley line 1 was measured using a measuring device as shown in FIG. A large number of actuators 6 are arranged so as to be in contact with the trolley line 1, and a large number of micro switches 7 are arranged on the lower surface of the boat body 5 so as to correspond to each actuator 6. Therefore, the amount of deviation of the trolley line 1 is detected by operating the micro switch 7 and its output.

In such a measuring device, the boat body 5 equipped with the actuator 6 and the micro switch 7 must be configured so that it can follow changes in the height of the trolley line 1. The weight is reduced and the contact pressure between the trolley line 1 and the actuator 6 is increased.

For this reason, the head of the actuator 6 becomes severely worn, the actuator 6 and the micro switch 7 are damaged due to contact pressure, and maintenance and management thereof becomes complicated.
In addition, since the entire pantograph that supports the boat body 5 is at a high potential in contact with the trolley line 1 which is at a high potential, the micro switch 7 and the signal transmission from the micro switch 7 to the low potential signal circuit in the vehicle are There were drawbacks such as the need for special insulation methods. [Object of the Invention] An object of the present invention is to provide a trolley line deflection measuring device which eliminates the drawbacks of the above-mentioned prior art and is capable of measuring the deflection of a trolley line without contact even during the day.

[Summary of the invention]

In order to achieve the above object, the present invention uses a laser beam to vertically scan the installation area of a line of trolleys from below, and detects the scanning timing and the reflected light from the line of trolleys with detection elements. It measures the amount of deviation of a single line, and is particularly characterized in that among the reflected light from a single trolley line, diffusely reflected light with a large amount of light is used for detecting a single trolley line.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 3 to 5 show an embodiment of the present invention, and in the figures, reference numeral 8 denotes a laser oscillator that emits a laser beam.

Reference numeral 9 denotes a light projection lens that focuses the laser beam from the laser oscillator 8 on its optical axis to form a virtual light source.

10 is a reflecting mirror that reflects the laser beam from the projection lens 9 and changes the direction of the optical axis.

Reference numeral 11 denotes a reflecting mirror in which a hole 12 through which the laser beam from the reflecting mirror 10 is transmitted is formed in the center.

13 is a condensing lens that condenses the laser beam from the hole 12 of the reflecting mirror 11 toward the installation area of the trolley line 1 (1゛, 1〃).

14 is a rotating polygon mirror that deflects the laser beam from the condenser lens 13.

15 and 16, a reflecting nose 17 that reflects the laser beam from the rotating polygon mirror 14 to change the direction of the optical axis is a reflecting mirror 1;
While converting the optical axis of the laser beam from 6 to parallel,
A concave mirror that vertically scans the installation area of the trolley line 1 from below.

The laser oscillator 8, the light projecting lens 9, and the reflecting mirrors 10 and 1
1, condensing lens 13, rotating polygon mirror 14, reflecting mirror 15, 1
6. An optical system is constituted by the concave mirror 17, and the laser beam emitted by the laser oscillator 8 can be used to scan the installation area of the trolley line-1 without attenuating it at all. The laser beam projected onto the sliding surface of the trolley line 1 is reflected by the trolley line 1. A part of this reflected light is transmitted to the concave mirror 17 and the reflecting mirror 16 of the optical system.
, 15, the rotating polygon mirror 14, and the condensing lens 13, and returns to the reflecting mirror 11. At this time, the reflected light specularly reflected by the trolley line 1 returns to the hole 12 of the reflector 11 and returns to the reflector 11.
1 and returns to the reflecting mirror 10. On the other hand, a part of the reflected light diffusely reflected by the trolley line 1 returns around the hole of the reflecting mirror 11. Moreover, natural light is also simultaneously projected onto the reflecting mirror 11 at the same time as the reflected light. 18 is the hole 12 of the reflecting mirror 11
An optical filter 19 transmits light having a wavelength close to the wavelength of the laser beam from among the light reflected around the laser beam.A light receiving element 19 receives the light transmitted through the optical filter 18 and converts it into an electrical signal.

20I@A timing light receiving element placed at one end of the deflection range of the laser beam by the rotating polygon mirror 14, which receives the laser beam, converts it into an electric signal, and detects the scanning timing.

A signal processing circuit 21 is connected to the light receiving element 19 and the timing light receiving element 20, and calculates the amount of deviation of the trolley line 1 based on electric signals applied from each.

This signal processing circuit 21 is connected to the light receiving element 19 and extracts a position signal (hereinafter referred to as RP signal) of the trolley line 1 based on the reflected light from the trolley line 1 from among the electric signals applied from the light receiving element 19. a waveform shaping circuit 22, a waveform shaping circuit 23 connected to the timing light receiving element 20 and extracting a scan start signal (hereinafter referred to as an ST signal) from an electric signal applied from the timing light receiving element 20, and the waveform shaping circuit 22, 23, and based on the RP signal and ST signal applied from each waveform shaping circuit 22, 23, transmits a command signal (hereinafter referred to as CP signal) for measurement timing of the deflection of the trolley line for each scan. Control circuit 24
and a sawtooth wave voltage signal (
A sawtooth wave circuit 25 that generates a T signal (hereinafter referred to as T signal) is connected to the control circuit 24 and sawtooth wave circuit 25, and is connected to a CP signal and a T signal applied from the control circuit 24 and sawtooth wave circuit 25.
It is constituted by an output circuit 26 that measures the amount of deviation of the trolley line 1 based on the signal and outputs the measurement result from the output terminal 27 (27a to 27n) corresponding to each trolley line 1.

In the above configuration, the rotating polygon mirror 14 is rotated at a constant speed, and the laser beam is oscillated from the laser oscillator 8 to align the trolley line 1.
The construction area is scanned vertically from below.

Then, when the timing light receiving element 20 receives the laser beam, measurement is started. At this time, the electrical signal from the timing light receiving element 20 is converted into an ST signal shown in FIG. 5 by the waveform shaping circuit 23 and applied to the control circuit 24 and the sawtooth wave circuit 25.

Then, the TV signal shown in FIG. 5 is oscillated from the sawtooth circuit 25 and applied to the output circuit 26. When the sliding surface of the trolley line 1 is irradiated with a laser beam scanning the installation area of the trolley line 1, the laser beam is reflected by the sliding surface. Here, the sliding surface of the trolley line 1 is like a shiny metal surface, but there are countless minute scratches on the sliding surface (scratches caused by contact with the pantograph, arcs caused by contact with the pantograph, etc.) Because of the scratches caused by electrical discharge, much of the laser beam irradiated onto the sliding surface is diffusely reflected. For this reason,
Most of the reflected light that returns to the reflecting mirror 11 is diffusely reflected light and returns around the hole 12. At the same time, natural light surrounding the trolley line 1 also enters the reflecting mirror 11. The light reflected by the reflecting mirror 11 enters the optical filter 18, and only the light having a wavelength close to that of the laser beam enters the light receiving element 19. When the light receiving element 19 receives the light transmitted through the optical filter 18 and generates an electrical signal, the waveform shaping circuit 22 selects the reflected light from the sliding surface of the trolley wire 1 from among the electrical signals applied from the light receiving element 19. The RP signal shown in FIG. 5 is applied to the control circuit 24. The control circuit 24 classifies the RP signal for each of the plurality of parallel trolley lines 1, 1'', 1'' and applies the CP signal shown in FIG. 5 to the output circuit 26. The output circuit 26 detects the voltage of the TV signal every time the CP signal is applied, outputs it from the corresponding output terminal 27, and holds the voltage of each output terminal 27 until the next voltage is applied. . At this time, the magnitude of the voltage at the output terminal 27 corresponds to the position of the trolley line 1. [Effects of the Invention] As described above, according to the present invention, a laser beam is used to scan the installation area of a line of trolleys, and the position of a line of trolleys is detected by feedback light that is diffusely reflected by the sliding surface of the line of trolleys. As a result, the eccentric position of the trolley line can be reliably measured without contact even during the day.

In addition, there is no damage to the equipment and it can greatly contribute to the maintenance and management of the trolley line.

[Brief explanation of the drawing]

FIG. 1 is a top view showing the equipment state of a trolley line, FIG. 2 is a front view of a conventional trolley line deviation measuring device, and FIG. 3 is a configuration diagram showing an example of a trolley line deviation measuring device according to the present invention.
4 is a block diagram of the configuration of the signal processing circuit in FIG. 3, and FIG. 5 is a time chart showing signal waveforms in FIG. 4. 1, 1', 1'2...Trolley line, 8...
・Lower oscillator, 9... Light projection lens, 11...
...Reflector, 12... Hole, 13...
・Condensing lens, 14...Rotating polygon mirror, 15,1
6...Reflector, 17...Concave mirror.

Claims (1)

[Claims] 1. After deflecting a laser beam emitted by a laser oscillator and passing through a hole formed in a reflecting mirror within a predetermined angle range, the optical axis is converted to parallel and the trolley wire installation area is vertically directed from below. a scanning optical system; a timing light receiving element that detects the polarized laser beam within the optical system;
A light receiving element that faces the reflecting mirror via an optical filter and receives the diffusely reflected light that is diffusely reflected by the sliding surface of the trolley wire and returns around the hole of the reflecting mirror, and is connected to the timing light receiving element and the light receiving element. , and a signal processing circuit for determining the amount of deflection of the trolley wire based on these outputs.