JP5244676B2 - Trolley wire wear amount detection optical system and trolley wire wear amount measuring device - Google Patents

Description

  The present invention relates to a trolley wire wear amount detecting optical system and a trolley wire wear amount measuring apparatus, and more specifically, measuring optics for measuring the wear amount of a trolley wire installed for power supply to a railway vehicle. The present invention relates to a trolley wire wear amount detection optical system that can reduce the size of a measurement optical system and can be mounted on the roof of a vehicle.

  The train vehicle on the train track obtains the required power from the trolley line via the pantograph upper surface (sliding plate). The lower surface (sliding surface or sliding surface) of the trolley wire and the upper surface of the pantograph are gradually worn by sliding contact with each other. The trolley wire is alternately displaced in the left-right direction for each supporting power pole so that the wear on the pantograph side does not concentrate on a part. The amount of wear and displacement of the trolley wire is inspected for good or bad by carrying a trolley wire wear amount measuring device in a test vehicle or the like and periodically running it.

One of the trolley wire wear amount measuring devices is a device that rotates a rotating polygon mirror (polygon mirror) on a horizontal plane, irradiates the trolley wire with a laser beam, and scans the trolley wire over its deviation range. One of them is that the reflected light from the trolley wire sliding surface obtained according to the scanning is received by the light receiving element through the perforated mirror to obtain the detection signal for the trolley wire sliding surface, corresponding to the scanning The generation width of the detection signal obtained in this way is calculated by a data processing device, thereby measuring the amount of trolley wire wear. An inspection vehicle equipped with such a trolley wire wear amount measuring device is already known (Patent Document 1).
The applicant has already applied for a trolley wire wear amount detection optical system that can be mounted on the roof of a commercial vehicle widely from the Shinkansen to the subway (Patent Document 2).

  For calculating the wear amount of the trolley wire wear amount measuring device, an image is collected by a CCD camera, the width of the sliding surface of the trolley wire is obtained by image processing, and the wear amount is measured therefrom (Patent Document 3). It is known to obtain a reflection signal from a wire sliding surface, obtain the width of the trolley wire sliding surface from the waveform, and calculate the amount of wear from this (Patent Documents 4 to 7).

JP 2001-59710 A JP 2007-24683 A JP-A-5-96980 Japanese Patent Laid-Open No. 5-34113 JP-A-5-290134 JP-A-10-194015 Japanese Patent Laid-Open No. 2005-271661

The trolley wire wear amount measuring apparatus as disclosed in Patent Document 1 is required to measure the wear amount of the trolley wire day and night. A light source for irradiating the trolley wire with laser light is a diode YAG laser as a solid laser and gas. Using a He—Ne laser or the like, it is necessary to generate a strong laser beam that is not inferior to sunlight and obtain reflected light from the trolley wire. Furthermore, a scanning system including a polygon mirror is required to cover the displacement range of the trolley line that is alternately displaced in the left-right direction as a detection range. Therefore, there is a drawback that the apparatus becomes large.
The thing of patent document 2 is devised about the width | variety and arrangement | positioning of a laser light source, the width | variety of a reflective mirror, and its arrangement | positioning in order to enable mounting on the roof of a business vehicle. However, since the trolley wire wear measuring device occupies most of the roof of the vehicle, the height of the vehicle itself is increased, the center of gravity of the vehicle is high, and the running stability such as the shaking of the vehicle body is lacking. There is.
SUMMARY OF THE INVENTION An object of the present invention is to solve such problems of the prior art, and to provide a trolley wire wear amount detecting optical system having a low apparatus height and capable of being downsized.
Another object of the present invention is to provide a trolley wire wear amount measuring apparatus that can reduce the size of a measuring optical system and can be mounted on the roof of a vehicle.

In order to achieve such an object, the trolley wire wear amount detecting optical system and the trolley wire wear amount measuring device according to the present invention are characterized by irradiating the trolley wire with projection light over the range of displacement of the trolley wire. In the trolley wire wear amount detection optical system that receives reflected light from the sliding surface of the trolley wire and obtains a detection signal about the sliding surface of the trolley wire,
A light projecting unit that generates slit-shaped projecting light from a plurality of monochromatic light sources arranged in the rail crossing direction and irradiates the sliding surface of the trolley wire, and a light receiving unit that has a field of view that covers the deflection range of the trolley wire With a unit,
The projected light generates reflected light on the sliding surface that is stronger than the light intensity of sunlight in the daytime. The reflected light from the sliding surface is received in the visual field and the image of the sliding surface is received on the light receiving surface. A first light receiver for receiving light, a filter for removing the wavelength of monochromatic light from the reflected light from the sliding surface in the field of view, and an image of the sliding surface on the light receiving surface through the filter in the field of view. The light receiving unit has a second light receiver, and a detection signal for the sliding surface is obtained by the difference between the detection signal of the first light receiver and the detection signal of the second light receiver.

As described above, in the present invention, there is provided a light projecting unit that generates slit-shaped projecting light by a plurality of monochromatic light sources arranged in the rail transverse direction and irradiates the sliding surface of the trolley wire, The detection signal for the sliding surface is obtained by the difference in the received light signal of the two light receivers with the first light receiver and the second light receiver that receives the reflected light from the trolley wire through the filter that removes the wavelength range of the monochromatic light. obtain. The projected light makes the reflected light from the sliding surface of the trolley wire monochromatic and generates reflected light on the sliding surface that is stronger than the daytime sunlight light intensity. Reflective light that is not lost is obtained.
In particular, if the monochromatic light in the infrared region is used, the difference from the intensity of sunlight increases, and there is no need to provide a light source that generates strong laser light. In addition, when monochromatic light is irradiated onto the trolley line over the range of deflection of the trolley line, it is only necessary to arrange a plurality of light sources in the rail transverse direction, thereby eliminating the need for rotational scanning with a polygon mirror or the like. Thus, the light projecting system and the light receiving system can be reduced in size.
As a result, it is possible to reduce the size of the light projecting system and the light receiving system, whereby the trolley wire wear amount detecting optical system can be mounted on the roof of the vehicle.

FIG. 1 is a diagram for explaining the measurement principle of the measurement optical system of the present invention. FIGS. 2A to 2D are explanatory diagrams of received light signals in the light receiver of the measurement optical system when there is a filter that removes the wavelength of monochromatic light in the infrared region and when there is no filter. FIG. 3 is an explanatory side view of an overhead wire inspection vehicle equipped with a trolley wire wear amount measuring apparatus using the measurement optical system shown in FIG. FIG. 4 is a schematic plan view showing the internal structure of the trolley wire wear amount measuring device with the top plate removed.

FIG. 1 illustrates the principle of the present invention. Reference numeral 1 denotes a measuring optical system of a trolley wire wear amount measuring apparatus 10 (see FIG. 3). This is composed of a light projecting unit 2, an imaging lens 3 and a light receiving unit 4.
The light projecting unit 2 irradiates the trolley wire 20 with monochromatic light having a specific wavelength in the range of infrared light. The light receiving unit 4 receives the reflected light from the trolley wire 20 through the imaging lens 3.
In the figure, L1 is the light projected by the light projecting unit 2, and the wavelength of the monochromatic light by the light projecting unit 2 is, for example, λ = 850 nm. L2 is the reflected light from the sliding surface 20a of the trolley wire 20. Reference numeral 3a denotes a focusing lens of the light projecting unit 2.
The light receiving unit 4 includes two light receivers, a light receiver 4a and a light receiver 4b, and the light receivers 4a and 4b are light receivers of a CCD line sensor. The light receiver 4a receives the reflected light L2 in the entire light wavelength region of the CCD photosensitivity characteristics. The entire light wavelength region usually has a gentle mountain-shaped peak characteristic in the range of 300 nm to 1000 nm, covers the visible light region, and reaches the infrared light region.
The light receiver 4b is provided with a filter 4c that removes the wavelength of the monochromatic light of the light projecting unit 2, λ = 850 nm, in front of the CCD line sensor, and the light receiving sensitivity characteristic thereof is the total light of the CCD except for λ = 850 nm. It is a wavelength region.

The light projecting unit 2 comprises a plurality of infrared region monochromatic light sources 2a, 2b,... Arranged in the transverse direction of the rail 21 shown in FIG. Therefore, the array lines of the CCD line sensors in each of the light receivers 4a and 4b are in the transverse direction of the rail 21, that is, the direction perpendicular to the paper surface.
As shown in FIG. 3, the light receiving unit 4 can be provided as a line sensor camera 9 having two CCD line sensors in which a filter 4 c is incorporated together with the imaging lens 3.
Returning to FIG. 1, the projection light L 1 of the projection unit 2 generates reflected light on the sliding surface 20 a of the trolley wire 20 that is stronger than the light intensity in the infrared region of daytime sunlight. Usually, since the light intensity in the infrared region of daylight sunlight is not large, if the distance between the trolley wire 20 and the light projecting unit 2 is about 1 m to 1.5 m, a monochromatic light LED having a relatively small output of about 1 W. It becomes possible by using.
Therefore, even when such light sources are arranged in the rail crossing direction, the area occupied by the trolley wire wear amount measuring apparatus 10 is small.

The received light signals A and B of the respective light receivers 4a and 4b are input to the differential amplifier 5, where the difference is taken and output as the detection signal S of the trolley wire sliding surface through the waveform slicing circuit 6. The
FIG. 2 is an explanatory diagram of the light reception signals A and B. FIG.
As shown in FIG. 2A, the light reception signal A obtained by the light receiver 4a without the filter 4c is received from the light reception signal A1 of the extraneous light from the sky (hereinafter referred to as sky noise) and the sliding surface 20a of the trolley wire 20. It is the sum of the reflected light A2 of monochromatic light. It occurs along the line direction of the CCD. The light reception signals of the light receiver 4a and the light receiver 4b are sequentially output serially synchronously along the line direction of the CCD, and the reading is continuously repeated. The readout circuit is not shown.
The vertical axis is the brightness (light reception level), and the horizontal axis is the line direction (rail crossing direction) in which the CCD line sensors are arranged. The same applies to FIGS. 2B to 2D.

At night, the light reception level of the light reception signal A1 is low, but since various external noises are mixed, the light reception signal A1 exists at a relatively low level.
On the other hand, as shown in FIG. 2B, the light reception signal B of the light receiver 4b provided with the filter 4c in front is mainly composed of the light reception signal B1 of the sky noise due to the removal effect of the filter 4c. The reflected light B2 is kept low.
As a result, the output signal C of the differential amplifier 5 taking these differences is a pulsed trolley wire sliding surface reflection signal (with a width corresponding to the trolley wire wear amount) as shown in FIG. Difference signal) C (= A1 + A2-B1-B2) is output from the waveform slice circuit 6 via the waveform slice circuit 6 as the detection signal S of the trolley wire sliding surface shown in FIG.

Returning to FIG. 1, the waveform slicing circuit 6 includes a peak level detection circuit 6a and a clip circuit 6b. The peak value P is detected by the peak level detection circuit 6a. The waveform of the trolley wire sliding surface reflection signal C is clipped or sliced at a level substantially ½ of the peak level by the clip circuit 6b that generates a ½ level, and the trolley wire slide shown in FIG. A moving surface detection signal S is generated.
Note that a level that is substantially ½ of the peak level is generated, for example, as a divided voltage by resistance division, and the peak value P detected by the peak level detection circuit 6a is determined by the trailing edge of the output of the detection signal S. Reset.
Thereby, the width of the trolley wire sliding surface can be obtained from the waveform slice circuit 6 as the pulse width of the detection signal S (signal on the pulse) of the trolley wire sliding surface.
The calculation of the amount of trolley wire wear (residual diameter) based on the detection signal S is described in various patent publications cited as prior art documents, and the description thereof is omitted.

FIG. 3 is an explanatory side view of an overhead wire inspection vehicle equipped with a trolley wire wear amount measuring apparatus using the measurement optical system shown in FIG.
In FIG. 3, reference numeral 10 denotes a trolley wire wear amount measuring device, which is installed on the vehicle roof upper surface 23 of the overhead wire inspection vehicle 22.
The trolley wire wear amount measuring apparatus 10 includes a measurement optical system 1, a trolley wire height detection mechanism 7, and a measurement optical system control unit 8.
The measurement optical system 1 includes a light projecting unit 2, a line sensor camera 9 having two CCD line sensors in which an imaging lens 3 and a filter 4c are built, and light reception provided in front of the line sensor camera 9. And an optical system 11.
The light receiving optical system 11 includes a rotating mirror 12, a folding reflection mirror 13 that returns reflected light in the incident direction, and a mirror moving mechanism 14 that moves the folding reflection mirror 13 back and forth, depending on the height of the trolley wire 20. The angle of the reflected light L2 is controlled so as to guide the change of the reflected light L2 from the sliding surface 20a that changes to the line sensor camera 9.
The light projecting unit 2 is also mounted on the rotary table 15, and the angle of the light projecting light L1 is controlled so as to follow the height of the sliding surface 20a that changes according to the height of the trolley wire 20.

FIG. 4 is a schematic plan view showing the internal structure of the trolley wire wear amount measuring apparatus 10 with the top plate removed.
The light receiving optical system 11 shown in FIG. 4 is different from FIG. 3 in that the folding reflection mirror 13 and its mirror moving mechanism 14 are omitted for the convenience of explaining the relationship of the divided light reception of the line sensor camera 9, and the trolley wire 20 is omitted. The line sensor camera 9 (9a, 9b, 9c) is provided at the end of the reflected light L2 without being reflected back from the reflected light L2, and is directly received.
As shown in FIG. 4, the light projecting unit 2 shown in FIG. 3 generates a slit-shaped light beam L by arranging a large number of single-color LED light emitters 2a, 2b,. To do. The width of the rail 21 in the transverse direction is such that the irradiation light L1 to the trolley wire 20 covers the deviation range (≈700 mm) of the trolley wire 20.
The light emitted from the LED light emitters 2a, 2b,... 2n is applied to the trolley wire 20 as a slit-shaped light beam L through the slit shaping condenser lens 2P.
The light projecting unit 2 generates a slit-shaped light beam L by enlarging the semiconductor laser light source 2Q as indicated by the dotted line in the transverse direction of the rail 21 with a lateral magnification lens instead of the LED light emitters 2a to 2n. Also good.

The rotating mirror 12 of the light receiving optical system 11 is installed as a mirror having a light receiving length of the reflected light L2 in the transverse direction of the rail 21 in order to receive the reflected light L2 in the deflection range (≈700 mm) of the trolley wire 20. Yes.
In the drawing, the rotation driving mechanism of the rotating mirror 12 is not shown, but the rotating shaft 12a is fixed to the back surface of the rotating mirror 12, and the rotating shaft is driven by a stepping motor.
The line sensor camera 9 is composed of three line sensor cameras 9a, 9b, and 9c, and divides the reflected light L2 into three so that the reflected light from the sliding surface 20a enters one of the cameras. Receive light. Note that the mutual light receiving boundary regions overlap each other. Thereby, the visual field which covers the deflection | deviation range of the trolley wire 20 is formed.
The number of divided light receiving cameras is not limited to three as long as a plurality of cameras are provided.

Returning to FIG. 3, the trolley wire height detection mechanism 7 includes a roller-type contact 7 a that comes into contact with the trolley wire 20, and a bending-supported turning arm 7 b in which two arms are linked to each other. It comprises an angle detector 7c in the vertical direction by a potentiometer that detects the rotation angle of the link on the root side.
A height detector that detects the height of the trolley wire by the angle of the rotating arm by this type of potentiometer is a well-known technique as described in, for example, Japanese Patent Laid-Open No. 7-120228. Therefore, the detailed explanation is omitted.

The projected light L1 from the light projecting unit 2 to the trolley wire 20 is a sliding surface 20a of the trolley wire 20 through the glass window 10b provided on the roof frame 10a (see FIG. 3) of the trolley wire wear amount measuring apparatus 10. Is irradiated.
The reflected light L2 from the trolley wire 20 passes through the glass window 10b, passes through the rotating mirror 12 and the folding reflecting mirror 13, and is in the field of view of any of the line sensor cameras 9 (three line sensor cameras 9a, 9b, 9c). Then, an image (one-dimensional waveform data) including the sliding surface 20a of the trolley wire 20 is received.
The glass window 10b is attached to the roof frame 10a at an angle of about 10 ° with respect to the horizontal plane of the roof frame 10a of the trolley wire wear measuring device 10.
The height of the roof frame 10a is actually at a position sufficiently lower than the lower limit height at which the trolley wire 20 is displaced up and down. This lowers the position of the glass window 10b. Therefore, the trolley wire wear amount measuring apparatus 10 can be installed with almost no influence on the height of the roof of the vehicle.

The measurement optical system control unit 8 receives the trolley line height signal from the angle detector 7c of the trolley line height detection mechanism 7 and receives the rotary table 15 of the light projecting unit 2, the rotary mirror 12, and the mirror moving mechanism 14. Is controlled so that an image (one-dimensional waveform data) of the trolley line 20 is collected in the field of view of the line sensor camera 9 even if the height of the trolley line 20 changes. Take control.
The measurement optical system control unit 8 is provided with a control data table 8 a for follow-up control with respect to the height of the trolley wire 20. In the control data table 8a, the angle value of the rotary table 15, the angle value of the rotary mirror 12, and the amount of movement of the mirror moving mechanism 14 are stored as control values corresponding to the detection value of the angle detector 7c. . Each control value is obtained in advance by analyzing each angle value of the rotary table 15 and the rotary mirror 12 and the amount of movement of the mirror moving mechanism 14 according to the height of the trolley wire 20.

On the other hand, the rotary table 15, the rotary mirror 12, and the mirror moving mechanism 14 each have a built-in encoder that indicates the current angle and moving position, and each is driven by a stepping motor. It is input to the control unit 8.
Therefore, the measurement optical system control unit 8 controls the rotary table 15, the rotary mirror 12, and the mirror moving mechanism 14 with reference to the control data table 8a, regardless of the change in the height of the trolley wire 20. Control is performed so that the image (one-dimensional waveform data) of the sliding surface 20a of the trolley wire 20 is received within the field of view of the line sensor camera 9 (three line sensor cameras 9a, 9b, 9c).

The line sensor camera 9 (three line sensor cameras 9a, 9b, 9c) is a digital camera having an A / D converter therein. Therefore, the image output is a digital value. The digital values of the one-dimensional images of the three line sensor cameras 9a, 9b, 9c are read out in parallel, and the two CCDs of each line sensor camera are simultaneously output synchronously and serially and read out. Is repeated continuously. The digital values of the one-dimensional images of the three line sensor cameras 9a, 9b, 9c are sent to the waveform data memory 16 and stored in the respective areas of the waveform data memory 16 as one-dimensional images. The The waveform data memory 16 is a push-down buffer memory that incorporates a controller that performs writing / reading, etc., and pushes down the stored data to store the latest waveform data at the head. A certain amount is temporarily stored, and the digital values of the old past one-dimensional image overflowed from the last storage location are sequentially discarded. The temporary storage capacity is set in relation to the processing time of the arithmetic unit 17.
Each one-dimensional image of the three line sensor cameras 9a, 9b, and 9c has one of the waveform signals shown in FIG. 2A and FIG. Is remembered.

The waveform data of each one-dimensional image stored in the waveform data memory 17 is sequentially read out from the old one by the arithmetic unit 18 constituted by a DSP or the like and processed, and then the waveform data is deleted.
The images of the sliding surface 20a (one-dimensional waveform data) in the reflected light L2 received in three divisions by the three line sensor cameras 9a, 9b, and 9c correspond to the light reception signal A and the light reception signal B, respectively, with no overlap. Waveform data is synthesized. Next, it is processed as waveform data of the sliding surface 20a of one trolley wire 20, and the waveform signals shown in FIGS. 2 (a) and 2 (b) are generated. Data corresponding to the sliding surface reflection signal (difference signal) C (= A1 + A2−B1−B2) is calculated.
Further, the peak value P is detected, and a level that is substantially ½ of the peak level is calculated. With this ½ level as a reference, a value higher than this is set to “1”, and a value less than that is set to “0”. Binarization processing is performed, and digital value data having a pulse width corresponding to the detection signal S of the trolley wire sliding surface as shown in FIG. 2D is calculated. It is stored in internal memory. Then, the width of the trolley wire sliding surface is calculated by converting the number of pixels of the continuous portion of “1” into a distance (corresponding to the pulse width of the detection signal S of the trolley wire sliding surface), and the trolley wire The width of the sliding surface is sent to the measuring device 18 as a digital value.
The measuring device 18 includes an MPU, a memory, and the like, and wears based on the width of the trolley wire sliding surface calculated by the arithmetic device 17 by executing a predetermined processing program stored in the memory by the MPU. Calculate the amount.

As described above, in the embodiment, monochromatic light in the infrared region is used, but monochromatic light is monochromatic light that generates reflected light on the sliding surface of the trolley wire that is stronger than the light intensity of daytime sunlight. If it exists, it is not limited to the thing of an infrared region.
In the embodiment, the reflected light from the sliding surface of the trolley wire is received by a one-dimensional CCD line sensor or a one-dimensional CCD camera. The light receiver of the present invention is a one-dimensional CCD line sensor or CCD. It is not limited to a camera, and any two-dimensional CCD image may be compressed in one dimension, and any photoreceiver can be used as long as it is capable of collecting images of sliding surfaces arranged in the rail crossing direction. There may be.
Furthermore, in the embodiment, the arithmetic device 17 is provided outside the measuring device 18, but the processing function of the arithmetic device 17 can be realized by program processing by the MPU provided in the measuring device 18. 17 may be deleted, and the calculation device 17 may be realized by the measurement device 18.
As a processing program in this case, a synthesis processing program for synthesizing waveform data corresponding to each of the light reception signal A and the light reception signal B from the light reception signals of a plurality of line sensor cameras, assuming that the reflected light L2 does not overlap, A processing program, a peak value detection program, and a binarization processing program for calculating a trolley wire sliding surface reflection signal (difference signal) C by calculating these differences based on waveform data corresponding to each of A and light reception signal B A program for calculating the width of the sliding surface of the trolley wire sliding surface.
Furthermore, the waveform data memory 16 may also be provided inside the measuring device 18.

1 ... Measuring optical system, 2 ... Projection unit,
3 ... imaging lens, 4 ... light receiving unit,
4a, 4b ... light receiver, 5 ... differential amplifier,
6 ... Waveform slice circuit, 7 ... Trolley line height detection mechanism,
8: Measurement optical system control unit, 8a: Control data table,
9 ... Line sensor camera,
10 ... Trolley wire wear amount measuring device, 11 ... Light receiving optical system,
12 ... Rotating mirror, 13 ... Folding reflection mirror,
14 ... mirror moving mechanism, 15 ... rotating table,
16 ... Waveform data memory, 17 ... Arithmetic unit,
18 ... Measuring device, 20 ... Trolley wire, 20a ... Sliding surface,
21 ... Rail, 22 ... Overhead inspection vehicle, 23 ... Vehicle roof top surface.

Claims (10)

Trolley wire wear amount detection optics for irradiating the trolley wire with light projected over the deflection range of the trolley wire and receiving reflected light from the sliding surface of the trolley wire to obtain a detection signal for the sliding surface In the system,
A slit-shaped by a monochromatic light source a plurality arranged in a direction traversing the rail, projecting irradiating before Kisuri dynamic surface to generate the projection light for generating intense the reflected light from the optical intensity of daytime sunlight An optical unit,
Have a field of view covering the deflection range of the contact wire, receives reflected light from the sliding surface in the field of view, a first light receiver for receiving the image of the sliding surface on the light receiving surface, wherein A filter that removes the wavelength of the monochromatic light from the reflected light from the sliding surface in the field of view, and a second light receiver that receives an image of the sliding surface on the light receiving surface through the filter in the field of view. A light receiving unit having
A trolley wire height detector;
A projection light rotating means for changing a projection angle of the projection light on the sliding surface ;
A rotating mirror that changes a light receiving angle of the reflected light from the sliding surface ,
Obtaining a detection signal for the sliding surface by a difference between the detection signal of the first light receiver and the detection signal of the second light receiver;
The projection angle is controlled so as to follow the height of the sliding surface according to the height obtained from the height detector of the trolley wire, and the height obtained from the height detector of the trolley wire. A trolley wire wear amount detecting optical system for controlling the light receiving angle so as to guide the change of the reflected light from the sliding surface that changes in response to the light receiving unit . The trolley wire wear amount detecting optical system according to claim 1 , wherein the light projecting light rotating means is a rotary table on which the light projecting unit is mounted . The trolley wire according to claim 1 or 2, wherein the monochromatic light source is an LED that uses monochromatic light in an infrared region as the projection light, and the LED is provided at a position 1 m to 1.5 m away from the trolley wire. Wear detection optical system. The first and second light receivers are CCD cameras having the lens, and the field of view is formed by providing a plurality of CCD cameras in the rail transverse direction, and the light projecting unit and the plurality of CCDs. The trolley wire wear amount detection optical system according to any one of claims 1 to 3, wherein the camera is provided on the roof of the vehicle.   Further, the rotating mirror and a folding reflection mirror for returning reflected light in the incident direction, the reflected light from the sliding surface is received by the rotating mirror and incident on the folding reflection mirror, and is reflected from the sliding surface. The trolley wire wear amount detection optical system according to claim 3, wherein reflected light is incident on the plurality of CCD cameras. Trolley wire wear amount detection optics for irradiating the trolley wire with light projected over the deflection range of the trolley wire and receiving reflected light from the sliding surface of the trolley wire to obtain a detection signal for the sliding surface In a trolley wire wear amount measuring device comprising a system and a measurement device that receives the detection signal and calculates the wear amount of the trolley wire,
The trolley wire wear amount detection optical system is slit-shaped by a plurality of monochromatic light sources arranged in the rail transverse direction, and generates the projection light that generates the reflected light stronger than the light intensity of daylight sunlight. a light projecting unit for irradiating before Kisuri dynamic surface Te,
Have a field of view covering the deflection range of the contact wire, a first light receiver for receiving the image of the sliding surface on its light-receiving surface receiving the light reflected from the sliding surface in the field, the field of view A filter that removes the wavelength of the monochromatic light from the reflected light from the sliding surface, and a second light receiver that receives an image of the sliding surface on the light receiving surface through the filter in the visual field. A light receiving unit;
A trolley wire height detector;
A projection light rotating means for changing a projection angle of the projection light on the sliding surface ;
A rotating mirror that changes a light receiving angle of the reflected light from the sliding surface ,
Obtaining a detection signal for the sliding surface by a difference between the detection signal of the first light receiver and the detection signal of the second light receiver;
The projection angle is controlled so as to follow the height of the sliding surface according to the height obtained from the height detector of the trolley wire, and the height obtained from the height detector of the trolley wire. A trolley wire wear amount measuring apparatus for controlling the light receiving angle so as to guide the change of the reflected light from the sliding surface that changes in response to the light receiving unit . The trolley wire wear amount measuring apparatus according to claim 6 , wherein the light projecting light rotating means is a rotary table on which the light projecting unit is mounted . The trolley wire according to claim 6 or 7, wherein the monochromatic light source is an LED that uses monochromatic light in an infrared region as the projection light, and the LED is provided at a position 1 m to 1.5 m away from the trolley wire. Wear amount measuring device. The first and second light receivers are CCD cameras having the lens, and the field of view is formed by providing a plurality of CCD cameras in the rail transverse direction, and the light projecting unit and the plurality of CCDs. The trolley wire wear amount measuring apparatus according to any one of claims 6 to 8, wherein the camera is provided on a roof of the vehicle.   Further, the rotating mirror and a folding reflection mirror for returning reflected light in the incident direction, the reflected light from the sliding surface is received by the rotating mirror and incident on the folding reflection mirror, and is reflected from the sliding surface. The trolley wire wear amount measuring apparatus according to claim 9, wherein reflected light is incident on the plurality of CCD cameras.

Images