JPH06307832A - Trolley cable wear amount calculating method using laser reflection beam - Google Patents

Abstract

(57) [Summary] (Corrected) [Purpose] Installed in inspection vehicles, maximum speed of 3 as new models.
A measurement system for measuring wear of a trolley wire at 60 km and detecting short defects such as local wear and cutting scratches, and a measurement method therefor. [Configuration] CCD reflected light from both sides and sliding surface of the trolley wire
The light is received by the sensor, the CCD sensor is scanned a plurality of times for each frame, and the received light signal is converted into digital multi-valued data by A / D conversion for each pixel. The multi-valued data is alternately stored in the two sets of buffer memories 631 and 632 on a frame-by-frame basis, and the multi-valued data stored in the other while being stored is alternately recorded on the magnetic tape of the VTR 64.
The magnetic tape recording multi-valued data on the inspection vehicle is mounted on the image processing unit 71 of the data processing unit 7 installed on the ground, image-processed to calculate the sliding surface width, and further converted into the remaining diameter. , And the average value data of each is displayed on the display 72.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for measuring wear of a trolley wire and a method for measuring the wear, and more particularly to a system for measuring speed of Shinkansen trains.

[0002]

2. Description of the Related Art A trolley wire of an electric railway gradually wears as a train runs. If this reaches a certain limit, it will cause a serious accident such as cutting, so a wear measuring device is installed in the inspection vehicle, the wear amount is measured in a timely manner, and the trolley wire that has reached the limit has to be replaced. Has been. Conventionally, various wear measuring devices have been developed.For example, in the Shinkansen, a laser-type wear measuring device is installed in an inspection car, and the measurement is performed at day-and-night speeds similar to those of commercial trains. There is.

FIG. 8 shows a schematic structure of the above-mentioned laser type wear measuring device. The wear measuring device 10 is composed of an optical system 1 and a data processing unit 2 which are mounted on an inspection vehicle, respectively.
In the optical system 1, the laser from the laser light source 11 is reflected by the plane mirror 12, focused by the projection lens 13 into a beam, passes through the central hole 141 of the hole mirror 14, and is swept by the rotary mirror 15. The swept laser beam is reflected by the first and second plane mirrors 161 and 162, further converted into a parallel beam by the parabolic mirror 17 and projected vertically upward, and the deviation D of the trolley wire 3 (about 70 c
m) is scanned and the sliding surface 3a on the bottom surface of the trolley wire 3 is illuminated. The light reflected by the sliding surface 3a returns to the hole mirror 14 through the above optical path in reverse. Since the reflected light is diffusely reflected, it is reflected by the periphery of the central hole 141, wavelength-selected by the filter 18, and received by the light receiver 19. The detection signal of the light receiver 19 is input to the data processing unit 2 and processed, and the amount of wear is measured.

The scanning of the sliding surface 3a by the parallel beam and the data processing by the data processing unit 2 will be described with reference to FIG. In FIG. 9 (a), the scanning line s of the parallel beam
Scans the sliding surface 3a at a distance interval p. The scanning interval p is inversely proportional to the scanning frequency and proportional to the traveling speed. For example, if the scanning frequency is 1000 Hz, the traveling speed is 200 kph.
In the case of M, the scanning interval p is 55 mm. Next, FIG.
(b) shows a cross section of the trolley wire 3, the cross section is circular with a diameter H ₀ , the width W ₁ of the sliding surface 3a gradually increases due to wear, and the remaining portion (remaining diameter) H _R decreases conversely. . Since the sliding surface width W ₁ and the residual diameter H _R have a fixed relationship, the sliding surface width W ₁ is measured and converted into the residual diameter H _R , and the wear is managed by this.

[0005]

In the Shinkansen, a new type vehicle capable of higher speed operation is planned, and some of them are already in practical use. Correspondingly, it is necessary to speed up the inspection vehicle as well, and it is said that the wear measuring device 10 will be reviewed at a later time. The advantage of the wear measuring device 10 is that it is not disturbed by the strong natural light of the sky due to the use of the laser beam, and it can be measured even in the daytime. However, the disadvantage is that the parabolic mirror 17 has a length of nearly 1 meter. Since it is quite large, it requires a large space to be installed in the inspection vehicle. Further, as a fundamental problem, there is a problem in measurement performance because the scanning interval p is too large. That is, at the speed of 200 kM, the sliding surface 3a is measured every 55 mm, as described above. On the other hand, the trolley wire 3 sometimes has a short defect that causes cutting such as abnormal wear and cutting scratches locally, and is overlooked when it is in the middle of each scanning line s. The speed of the new model vehicle is higher, for example, at the target maximum speed of 360 kM, the scanning interval p is about 100 mm, so that the probability of missing a defect is further increased. To shorten the scanning interval p,
The scanning frequency may be set higher, but since the rotating mirror 15 is a mechanical type, there is a limit to the frequency, and it is difficult to increase this dramatically. To solve this problem, there is no choice but to digitize the scanning method. By simplifying the above-mentioned large scale device and solving the difficulty in measurement performance, the maximum speed of 36
There is a need for a wear measurement system that can measure at 0 kM and also detect short defects. However, for the time being, it is said that it is for daytime only and nighttime measurement is not necessarily a condition. An object of the present invention is to provide a trolley wire wear measuring system and a measuring method therefor that achieve the above-mentioned demand.

[0006]

The present invention is a trolley wire wear measuring system and wear measuring method. The wear measurement system is mounted on the roof of the inspection vehicle, and has a plurality of light projectors that project light beams on both sides and sliding surfaces of the trolley wire, and a plurality of deflection ranges for the trolley wire. And a light receiving system including a plurality of light receivers each having a CCD linear sensor (hereinafter simply referred to as a CCD sensor). An image frame (hereinafter simply referred to as frame) F is made to correspond to the traveling distance for a certain traveling time of the inspection vehicle. Frame F as the inspection vehicle runs
Each CCD sensor is scanned a plurality of times for each pixel, and the intensity of the received light signal output from the CCD sensor that receives the reflected light from both side surfaces and the sliding surface and the background light is converted into digital multi-valued data for each pixel. A signal processing unit consisting of an A / D converter and two sets of buffer memories and VTRs for alternately storing and recording the multi-valued data sequentially output by the A / D converter in units of frame F is detected. Place it inside the car. VT
The multi-value data recorded in the R to image processing, an average value of the sliding surface width W ₁ of each frame F are calculated, respectively, which were converted into the remaining diameter H _R of the trolley wire, the sliding surface width W ₁ An image processing unit that outputs average value data of the remaining diameter H _{R for} the frame F is installed on the ground. In the wear measuring method, a CCD sensor receives light reflected by the sliding surface and both side surfaces of the light beam projected on both side surfaces and the sliding surface of the trolley wire, and background light. With the running of the inspection car,
CC for each frame F corresponding to the mileage for a fixed time
The D sensor is scanned a plurality of times, and the intensity of the received light signal output from the CCD sensor is converted into digital multi-valued data by A / D conversion for each pixel. By the image processing unit,
The multi-valued data is added for each pixel to create a distribution curve G of the number of pixels of each frame F with respect to the intensity of the received light signal. From the distribution curve G, the background light and both side surfaces, and the both side surfaces and the sliding surface, Boundary points for each number of pixels are obtained. The multivalued data is ternarized using the intensities L _a and L _b of the boundary points as threshold values, and an intensity curve K having the horizontal axis in the scanning direction is created from the ternary data. From the strength curve K, the average relative widths W ₁ 'and W ₂ ' of both side surfaces and sliding surface for each frame are obtained,
The relative width W ₁ 'is converted to the absolute width W ₁ by referring to the known absolute width W ₂ of both side surfaces, and the average value of the remaining diameter H _R of the trolley wire for each frame is calculated from the absolute width W _1. , The average value data of the absolute width W ₁ of the sliding surface and the residual diameter H _{R for} the frame F is output. In the above wear measuring method, 5.0 mm of each traveling distance at a maximum speed of 360 km / h of the inspection vehicle is made to correspond to each frame F.
Scan the CCD sensor against at least 25 times,
The scanning interval p is 0.2 mm at maximum. In the above-mentioned wear measuring method, when the intensity curve K has a depressed portion due to black points or the like existing on the sliding surface or both side surfaces, this is removed by image processing by the spatial filter method.

[0007]

In the above wear measuring system, the light projecting system projects light beams on both side surfaces and the sliding surface of the trolley wire, and the reflected light and background light by these are received by one of the plurality of CCD linear sensors. To be done. As the inspection vehicle travels, the CCD sensor scans a plurality of times for each frame F corresponding to the travel distance for a certain travel time, and the intensity of the light reception signal output from the CC sensor that receives the reflected light. Is converted into digital multi-valued data by an A / D converter for each pixel, stored alternately in two sets of buffer memories of the signal processing unit in frame F units, and then recorded in the VTR. The above is done while the vehicle is in the inspection vehicle. The multi-valued data recorded on the VTR is batch processed offline by the image processing unit installed on the ground.
The average value of the sliding surface width W ₁ for each frame F is calculated, and the remaining diameter H _R of the trolley wire is calculated from these by a predetermined conversion formula, and the average of the sliding surface width W ₁ and the remaining diameter H _{R for} the frame F is calculated. Each value data is output. In the above-mentioned measurement system, the background light received by the CCD sensor is extremely strong in the daytime, but it is difficult to perform the measurement.
At night, the background light is weak and there is sufficient contrast between the sliding surface and both side surfaces, and wear measurement can be performed well. Also,
The above-mentioned light emitting system and light receiving system are both mounted on the roof of an inspection vehicle with a simple configuration, only the signal output section is placed inside the inspection vehicle, and the image processing section is installed on the ground. As a result, the installation space for the inspection vehicle is small and the purpose of simplification is achieved. Next, in the wear measuring method, multi-valued data created by 25 scans of the CCD sensor and A / D conversion is added for each pixel by image processing,
The received light signal intensity of each pixel becomes flat by averaging the irregularities. However, since this waveform is not very clear, an error will be large if the sliding surface width W ₁ is directly obtained. Therefore, a distribution curve G of the number of pixels is created from the added multivalued data. The background of the trolley line is dark or moonlit at night, but in the tunnel section there is a slightly bright reflection from the ceiling. On the other hand, both sides of the trolley wire have a considerable brightness due to the projected light beam, and the sliding surface has a good reflectance. Therefore, the number of pixels of the distribution curve G is the background light and both sides and the sliding surface. There is a boundary point between them. The strengths L _a and L _b at each boundary point are obtained, and the strength curve K created by converting multi-valued data into ternary data using these as thresholds forms a clear three-step waveform, so the boundaries of each step are defined. From the points, the average relative widths W ₁ ′ and W ₂ ′ of the sliding surface and both side surfaces with respect to the frame F can be accurately obtained. The absolute width W ₂ of both sides are known, which refer to the relative width W ₁ 'is converted into the absolute width W _1, and further calculates the remaining diameter H _R is a predetermined conversion formula, the absolute sliding surface Average value data for the frame F having the width W ₁ and the remaining diameter H _R is output. In the above, the sliding surface width W ₁ or the residual diameter H _R
Is not measured for each scanning interval p, but is 5.0 at maximum.
Since the average value of mm for each frame F is calculated,
Short defects such as local wear and cutting scratches are also detected without fail, and problems in measurement performance are almost solved. When the intensity curve K has a dip portion due to black dots or the like existing on the sliding surface or both side surfaces, it is removed by the soft processing by the spatial filter method.

[0008]

1 to 5 show an embodiment of a wear measuring system for a trolley wire according to the present invention. FIG. 1 shows a light projecting system 4, FIGS. 2 and 3 show a light receiving system 5, and FIGS. FIG. 3 is a schematic configuration diagram of each of the signal processing unit 6 and the data processing unit 7. Figure 1
The light projection system 4 shown in (a) has a plurality of, for example, five light projectors 4a to 4e arranged on the roof of the inspection vehicle, and shares the range of the deviation D (70 cm) of the trolley wire 3 with light. Project a beam.
The floodlights 4b, 4c, 4d mainly illuminate the sliding surface 3a, and the floodlights 4a, 4e on both sides are increased in height to mainly the both side surfaces 3b,
Irradiate 3b. Figure (b) shows a cross section of the irradiated trolley wire 3. The light receiving system 5 shown in FIGS. 2 (a) and 2 (b) includes, for example, seven light receivers 52a to 52a inside a housing 51 provided on the roof of an inspection vehicle.
It consists of 52g arranged at equal intervals. Each photodetector 52 corresponds to 100 mm, which is 1/7 of the deviation D. The case
On the upper surface of 51, a slit plate 53 having a slit having a narrow width in the direction of the trolley wire 3 is provided for each light receiver. FIG. 3 (a) shows the configuration of each light receiver 52, which includes an imaging lens 521,
A large number of pixels [e] are CCD sensors 522 arranged at minute intervals, and 100 mm in the direction perpendicular to the trolley wire 3.
The light in the range of is incident on the imaging lens 521 and is imaged on the pixel [e], and in the direction of the trolley line 3, the light having a narrow width δd is incident on the pixel [e] by the slit plate 53. It Figure 3
(b) illustrates a method of scanning the CCD sensor 522 with respect to the trolley wire 3, and sets the image frame F in accordance with the traveling distance of the inspection vehicle for a certain period of time. Although the length of the frame F is proportional to the traveling speed, it is set to 5.0 mm at a maximum speed of 360 km, for example, from the viewpoint of the resolution for the short defect described above. The CCD sensor 522 scans each frame F at least 25 times.
When the speed is the highest, the scanning interval p between the scanning lines s _{1 to} s ₂₅ is 0.2 mm, and when the speed is 100 km / hour, F is about 1.4 mm and the resolution is improved. The scanning interval p in this case is 0.0
It is 55 mm. However, since each pixel [e] has a width in the direction perpendicular to the scanning and the reflected light of the trolley wire 3 is continuously received with this width, the scanning interval p is not so important. Next, FIG. 4 shows the signal processing unit 6 arranged in the inspection vehicle, including a clock generator (CLK) 61, an A / D converter 62, two sets of buffer memories (BF / MEM) 631, 632, and a video. A tape recorder (VTR) 64 is configured as a main element, and the CCD sensor 522 of each light receiver 52 is connected to the A / D converter 62. The data processing unit 7 is installed on the ground, the display image processing unit 71 for image processing by mounting a magnetic tape VTR 64, the H _R measurement data of the sliding surface width W ₁ or the remaining diameter (average value), together with the measurement position The display 72 and so on. The measurement position is detected by the position detector, but the description is omitted. Figure 5 shows each buffer memory
It shows the memory area of 631,632 in 3D space.
Eight memory cells [c] of 8 bits and 1 byte are arranged in the Y direction, and the memory cells are arranged in the X (scanning) direction by the number of pixels of the CCD sensor 522, and correspond to the scanning line s _1.
[m ₁ ] is constructed. Similarly, the scanning lines s ₂ , s ₃ , ...
... memory layer for _{s 25 [m 2], [} m 3], ...... [m 25] are stacked in the Z-direction, respectively one frame F content is constituted.

The operation of each part of the above wear measuring system will be described below. Five projectors 4a to 4e of the projector system 4
As a result, the light beam is projected onto the range of the deviation D of the trolley wire 3, and the sliding surface 3a and both side surfaces 3b, 3b are respectively irradiated. As the inspection vehicle runs, the seven light receivers 52 of the light receiving system 5
Any one of a to 52g receives the reflected light and the background light of the sliding surface 3a and both side surfaces 3b, and the received light is incident on the imaging lens 521 through the slit plate 53 and the CCD sensor.
An image is formed on the pixel [e] of 522. CCD sensor 522
With the clock signal provided from the clock generator 61 of the signal processing unit 6, each frame F is scanned 25 times at the scanning interval p to output the light reception signal, and the intensity L of each light reception signal is
Each pixel [e] is digitized by the A / D converter 62 and multi-valued data of 8 bits and 256 gradations is output.
For multi-valued data, two sets of buffer memory 63 are used for each frame F.
Alternately stored in 1,632, while one is being stored, multivalued data stored in the other is alternately recorded on the magnetic tape of the VTR64. The magnetic tape that recorded multi-valued data on the inspection car,
It is mounted on the image processing unit 71 of the data processing unit 7 installed on the ground, image-processed to calculate the sliding surface width W ₁ , further converted into the remaining diameter H _R, and the average value data of each is displayed on the display 72. Is displayed. The image processing method in the image processing unit 71 will be described in detail in the wear measuring method described below.

FIG. 6 is an explanatory view of the principle of wear measurement in an embodiment of the method for measuring wear of a trolley wire according to the present invention, and FIG. 7 is a flow chart showing a wear measurement procedure. Figure 6
In (a) of (a), the light beam projected on the trolley wire 3 is very strong on the sliding surface 3a as described above,
Then it is reflected somewhat strongly. In comparison with these, the background light is very weak at night. If the sliding surface 3a and both side surfaces 3b have black dots 3
When c is present, the light reflected by it is very weak, as is the background light. On the other hand, (B) shows an example of digital multi-valued data obtained by A / D converting the intensity of the received light signal of an arbitrary scanning line s, and shows the background light and the level of the reflected light from both side surfaces 3b and sliding surface 3a. Are large in this order, and a dip r occurs in the waveform due to the black dot 3c. When the multi-valued data for all the scanning lines s for the frame F are added for each pixel [e], the unevenness is averaged and becomes fairly flat as shown in (c), and the dip r is relatively shallow. FIG. (B) shows an example of a distribution curve G of the number of pixels with respect to the intensity L, which is created from the added multi-valued data. In the range of 3, the small number of pixels due to the side surfaces 3b is distributed, and in the range of large intensity L, the number of slightly protruding pixels due to the sliding surface 3a is distributed. However, the above distribution curve G is an example, and in general, the distribution shape of the number of pixels with respect to the intensity L is not always shown. However, when the intensity L is near 0,
The middle range and the range larger than the middle range are background light,
There is no doubt that it corresponds to both side surfaces 3b and sliding surface 3a. Because each extent of the distribution curve G is a height difference, boundary points as shown in each of alpha, _b the boundary points β is present alpha,
β and the respective intensities L _a and L _b are obtained, the above-mentioned added multi-valued data is ternarized using the intensities L _a and L _b as threshold values, and further the ternary data of which the horizontal axis is in the scanning (X) direction. Strength curve K
To create. FIG. 6C shows an example of the intensity curve K. The lower part of the threshold L _a is background light, and the middle of the thresholds L _a and L _b is both side surfaces 3.
b and the upper part of the threshold value L _b correspond to the sliding surface 3a 3
It is clearly divided into stages. However, since the intensity curve K has an arbitrary scale, the illustrated W ₁ ′ and W ₂ ′ indicate the relative widths of the sliding surface 3 a and both side surfaces 3 b. By image processing, the relative width W ₁ ',
W ₂ ′ is calculated, the absolute width W ₁ of the sliding surface 3 a is obtained by referring to the known absolute width W ₂ of both side surfaces 3 b, and further converted into the residual diameter H _R. However, absolute width W ₁ and remaining diameter H
_{Each R} is an average value for the frame F. Note that, regardless of the averaging by the above addition, when the dip r still remains in the range of the sliding surface 3a as shown in FIG. 6 (c), it is removed by image processing by the spatial filter method, The widths W ₁ 'and W ₂ ' are accurately calculated. Explaining the principle of the spatial filter method with Fig. (D), in any 9 pixels [e] (or pixel group), one of the centers is "
When 0 is 0 and all eight in the periphery are "1", the central one is also regarded as "1" and is removed.

The procedure of the wear measuring method will be described with reference to the flowchart of FIG. 7 and FIG. In consideration of the short defect of the trolley wire, the length of the frame F is set to 5.0 mm with respect to the maximum speed of the inspection vehicle, and each CC for each frame F is determined.
The number of scans of the D sensor 522 is set to 25 times. The CCD sensor 522 is scanned as the inspection vehicle travels, and the intensity of the received light signal output from the CCD sensor 522 is A / D converted into 8-bit, 256-gradation digital multi-valued data. By the image processing, the multi-valued data for the frame F is added for each pixel to create a distribution curve G of the number of pixels for the strength L, and the strength L at the boundary points α and β of this distribution curve.
_{Find a} and L _b . The multilevel data is ternarized using the intensities L _a and L _b as threshold values, and the intensity curve K in the scanning direction is created from the ternary data. If the intensity curve K falls within the range of the sliding surface 3a or both side surfaces 3b, a dip r
When there is remaining, it is removed by the spatial filter method, and the average relative widths W ₁ ', W _{2 of the} sliding surface 3a and the both side surfaces 3b are calculated from the intervals between the three boundary points of the intensity curve K. 'Is obtained, the relative width W ₁ is converted to the absolute width W ₁ by referring to the known absolute width W ₂ of both side surfaces 3b, and the average value data of the absolute width W ₁ of the sliding surface with respect to the frame F is output. To be done. Further, according to a predetermined conversion formula, the residual diameter H _R is calculated from the absolute width W _1.
Is calculated, and the average value data of the remaining diameter H _R for the frame F is output (10). With the above, the processing for the frame F is completed (11), the routine returns to the step and shifts to the next frame F, and the above image processing is continued. In the wear measuring system described above, multi-valued data is recorded on the magnetic tape of the VTR64 while the vehicle is running on the inspection vehicle, and the image processing unit 71 installed on the ground performs the above steps (11). It is intended for batch processing offline.

[0012]

As described above, in the trolley wire wear measuring system according to the present invention, the light projecting system and the light receiving system are both simple in structure and easily mounted on the roof of an inspection vehicle or the like. Also, since only the signal processing unit is placed inside the vehicle, the mounting part for the inspection vehicle is simplified, and by installing the image processing unit on the ground, it is not necessary for some of the handling personnel to board This has the effect that the space for measuring cars is small. Also, depending on the wear measuring method, the maximum speed is 36
The average value of the sliding surface width W ₁ or the residual diameter H _R is accurately measured for each image frame F of maximum 5.0 mm set corresponding to 0 km, and local wear and cutting scratches are also measured. It is possible to detect short defects such as
There are many areas that contribute to the measurement of nighttime trolley wire wear at night.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a light projecting system 4 in an embodiment of a wear measuring system for a trolley wire according to the present invention.

2A and 2B are explanatory views of a light receiving system of the wear measuring system, in which FIG. 2A is a vertical sectional side view thereof, and FIG. 2B is a lateral sectional view thereof.

3A and 3B are explanatory views of a method of setting an image frame F, in which FIG. 3A is a longitudinal sectional view thereof, and FIG. 3B is a transverse sectional view thereof.

FIG. 4 is an explanatory diagram of a scanning method of a CCD linear sensor.

FIG. 5 is a schematic system configuration diagram in an embodiment of the wear measuring system of the present invention.

FIG. 6 is an explanatory diagram of the principle of wear measurement in the method for measuring wear of a trolley wire according to the present invention, where (a) is an explanatory view of the reflection state of the trolley wire, and (b) is the sum of them. Explanatory diagram of intensity distribution by value data, (c) its intensity curve, (d)
FIG. 4 is an explanatory diagram of the spatial filter.

FIG. 7 shows a flowchart of a measuring procedure in an embodiment of the wear measuring method of the present invention.

FIG. 8 is a schematic configuration diagram of a laser-type wear measuring device 10.

9 is an explanatory diagram of a laser beam scanning interval p and a measured sliding surface 3a or remaining diameter H _R of the trolley wire 3 in the wear measuring device 10. FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Optical system, 11 ... Laser light source, 14 ... Hole mirror, 15 ... Rotating mirror, 17 ... Parabolic mirror, 18 ... Filter, 19 ... Photoreceiver, 2 ... Data processing part, 3 ... Trolley line, 3a ... Sliding surface,
3b ... both sides, 3c ... black spots on sliding surface, 4 ... projection system, 4a-
4e ... Emitter, 5 ... Light receiving system, 51 ... Housing, 52, 52a to 52g ...
Light receiver, 521 ... Imaging lens, 522 ... CCD linear sensor, 53 ... Slit plate, 6 ... Signal processing unit, 61 ... Clock generator (CLK), 62 ... A / D converter, 631,632 ... Buffer memory (BF MEM), 64 ... VTR, 7 ... Data processing unit, 71 ... Image processing unit, 72 ... Display device, 10 ... Laser type wear measuring device, D ... Deflection of trolley wire, or its range, p ... Scanning interval, F ... Image frame, s, s _{1 to} s
₂₅ ... Scan line, [e] ... Pixel of CCD sensor, [c] ... Memory cell of buffer memory, [m ₁ ] to [m ₂₅ ] ... Memory layer, r ... Drop of waveform due to black dots, X ... Scan direction, L
... strength distribution curve of G ... number of pixels, alpha, beta ... boundary point distribution curve, L _a, L _b ... intensity curve of the intensity K ... 3 value data of the boundary points, H _o ... diameter of the contact wire, H
_R … Remaining diameter, W ₁ ', W ₂ '… Relative width between sliding surface and both sides, W
₁ , W ₂ ... Absolute width between sliding surface and both side surfaces.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Takanori Ninomiya, 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Inside the Hitachi, Ltd. Institute of Industrial Science (72) Inventor Tetsuo Tsuburaya 1-6-5, Marunouchi, Chiyoda-ku, Tokyo No. East Japan Railway Company (72) Inventor Kunio Ikeda 1-6-5 Marunouchi, Chiyoda-ku, Tokyo East Japan Railway Company (72) Inventor Isao Sato 1-6 Marunouchi, Chiyoda-ku, Tokyo No. 5 East Japan Railway Company

Claims (4)

[Claims] 1. A light projecting system, which is mounted on the roof of an inspection vehicle and comprises a plurality of light projectors for projecting a light beam on the sliding surface and both side surfaces of the trolley wire, and each of the deviation ranges is divided into a plurality of parts. And a light receiving system including a plurality of light receivers each having a CCD linear sensor, the image frame F being associated with a travel distance of the inspection vehicle for a certain traveling time. A CCD that scans the CCD linear sensor a plurality of times for each image frame F as the vehicle runs and receives reflected light and background light on the sliding surface and both side surfaces.
The A / D converter for converting the intensity of the received light signal output from the linear sensor into digital multi-valued data for each pixel, and the multi-valued data sequentially output by the A / D converter are stored in the image frame. Alternately store and record in F units 2
A signal processing unit including a pair of buffer memories and a VTR is arranged in the vehicle of the inspection vehicle, and the multivalued data recorded in the VTR is subjected to image processing to obtain each of the image frames having the sliding surface width W _1. The average value for F is calculated, and each average value is converted into the residual diameter H _R of the trolley wire, and the average value data of the sliding surface width W ₁ and the residual diameter H _R for the image frame F is calculated. A trolley wire wear amount calculation method using laser reflected light, characterized in that an image processing unit for outputting is installed on the ground. 2. A CCD linear sensor receives light reflected by the sliding surface and both side surfaces of a light beam projected on the sliding surface and both side surfaces of the trolley wire, and the background light for a fixed time of the inspection vehicle. The CCD linear sensor is scanned a plurality of times for each image frame F corresponding to the distance traveled, and the intensity of the light reception signal output from the CCD sensor is A / A for each pixel.
The data is converted into digital multi-valued data by D conversion, and the image processing unit adds the multi-valued data for each pixel to create a distribution curve G of the number of pixels of each image frame with respect to the received light signal intensity. Then, from each distribution curve G, a boundary point of the number of pixels of each of the background light and both side surfaces, and both side surfaces and the sliding surface is obtained, and the multilevel data is set with the intensities L _a and L _b of the boundary points as threshold values. Is ternary, and an intensity curve K with the scanning direction as the horizontal axis is created from the ternary data, and the image frames F on the both side surfaces and the sliding surface are formed from the intensity curve K.
The average relative widths W ₁ ′ and W ₂ ′ are obtained respectively, and the relative widths W ₁ ′ are converted to absolute widths W ₁ by referring to the known absolute widths W ₂ on both side surfaces. wherein from W ₁ calculates the average value of the remaining diameter H _R of the contact wire for each image frame F, the absolute width W ₁ and the remaining diameter H _R of the sliding surface
A method for calculating the amount of trolley wire wear using laser reflected light, which is characterized in that average value data for the image frame F is output. 3. The traveling distance of 5.0 mm at a maximum speed of 360 km of the inspection vehicle is made to correspond to each of the image frames F, and the CCD linear sensor scans the image frames F at least 25 times. The trolley wire wear amount calculation method using laser reflected light according to claim 2, wherein the scanning interval p is set to a maximum of 0.2 mm. 4. When the intensity curve K has a drop portion due to black dots or the like existing on the sliding surface or both side surfaces, the drop portion is subjected to image processing by a spatial filter method and removed. The method of calculating the trolley wire wear amount using the laser reflected light according to claim 2.