JP4364028B2 - Measuring method and measuring device for trolley wire wear amount - Google Patents

Description

  The present invention relates to a trolley wire wear amount measuring method and measuring apparatus, and more specifically, irradiates a laser beam perpendicularly to a trolley wire sliding surface, receives the reflected light, and determines the trolley wire based on the received light signal. In a trolley wire wear amount measuring device that measures the amount of wear, the amount of wear that causes a signal that is not a waveform of the trolley wire sliding surface to be misidentified as a waveform of the trolley wire sliding surface due to the influence of disturbance noise The present invention relates to a trolley wire wear amount measuring method and a measuring apparatus that can reduce erroneous calculation of the trolley wire.

The electric railway trolley wire gradually wears as the train travels. If this reaches a certain limit, it may cause a serious accident such as cutting, so the inspection vehicle is equipped with a wear amount measuring device, and when the amount of wear is measured in a timely manner, the trolley wire that reaches the limit can be replaced. It has been taken.
Various types of wear amount measuring devices have been developed. For example, the Shinkansen is equipped with a laser-type wear amount measuring device on the inspection vehicle, which can measure at the running speed of a commercial train day and night. Has been made.

As this type of trolley wire wear amount measuring device, an image is obtained by a CCD camera, the width of the trolley wire sliding surface is obtained by image processing, and the wear amount is measured from this (Patent Document 1). There are those that obtain a reflection signal from the sliding surface, obtain the width of the trolley wire sliding surface from the waveform, and calculate the wear amount from this (Patent Documents 2 to 4).
JP-A-5-96980 Japanese Patent Laid-Open No. 5-34113 JP-A-5-290134 JP-A-10-194015

In Patent Documents 2 to 4 and the like that obtain a reflection signal of the latter trolley wire sliding surface, obtain the width of the trolley wire sliding surface from the waveform, and calculate the amount of wear from this, the trolley wire sliding is calculated from the waveform of the detection signal. The waveform of the moving surface is determined, and the width of the waveform is calculated as the width of the trolley wire sliding surface.
On the other hand, around the trolley wire, there are various support fittings such as overhead wire fittings and bending fittings, various wires attached to the structure such as tension wires, suspension wires and tunnels, tunnels, etc., simple overhead wires (Hyper overhead line) and the like, there is a problem that disturbance noise from these enters the detection signal.
Moreover, since the trolley wire is installed in a zigzag, it is difficult to distinguish between various disturbance noises and the detected waveform of the trolley wire sliding surface. For this purpose, a gate (window pulse for detection) is usually set in the detection range of the trolley wire, and the detection signal can be binarized with a predetermined threshold value to obtain a pulse signal. Therefore, a signal waveform having a predetermined pulse width is determined as a detection signal for the trolley wire sliding surface.

However, as shown in FIG. 5, if there is a reflecting object that generates reflected light close to the width of the trolley wire sliding surface in the vicinity of the trolley wire 1, it cannot be determined which one is the correct detection signal. Therefore, normally, the first pulse signal corresponding to the width of the trolley wire sliding surface in the gate is used as a detection waveform for the width of the trolley wire sliding surface, and the trolley wire wear amount is calculated based on the detected waveform. .
In FIG. 5, 1 is a trolley wire, 1a is a sliding surface of the trolley wire, 2 is measurement light, 3 is a reflector, 4 is a detected waveform, and 5 is calculated as a trolley wire wear amount. The remaining diameter of the trolley wire, and its height h1 represents the calculated remaining diameter.
For the remaining amount measurement, the light reception signal obtained from the light receiving element of the inspection transceiver is binarized to obtain a detection signal, from which a detection waveform corresponding to the trolley wire sliding surface 1a is obtained, The trolley wire wear amount is calculated by converting the pulse width into the remaining diameter.
Here, 4a of the detection waveform 4 is a waveform of the trolley wire sliding surface, and 4b is a noise waveform. When these waveforms are calculated as one, the trolley wire remaining diameter becomes a value h2 that is higher by the amount of noise. On the contrary, when only the later waveform 4b side is regarded as the waveform of the trolley wire sliding surface, the trolley wire remaining diameter is calculated to be smaller than the actual trolley wire remaining diameter.
In FIG. 5, the noise waveform 4b is on the rear side of the waveform 4a of the trolley wire sliding surface, but it may be on the front side or on both sides.

By the way, on a trolley line that hits a curved track, the amount of wear in the direction of travel is large, and there are places that are extremely worn, and if noise etc. are mixed, the detection signal is binarized. Even if the waveform is shaped, an appropriate waveform cannot be distinguished, and the trolley wire remaining diameter is easily calculated erroneously. Also, it is difficult to identify which is the correct detection waveform.
An object of the present invention is to solve such problems of the prior art, and a signal that is not a waveform of a trolley wire sliding surface among detection signals due to the influence of disturbance noise is regarded as a waveform of the trolley wire sliding surface. It is an object of the present invention to provide a trolley wire wear amount measuring method and measuring apparatus capable of reducing erroneous calculation of wear amount that is measured by misidentification.

In order to achieve such an object, the trolley wire wear amount measuring method and measuring device of the present invention is characterized in that the detection waveform of the trolley wire sliding surface can be obtained with respect to the received light signal or the amplified signal. The trolley wire wear amount measuring device sets a gate to set the signal waveform corresponding to the reflected light from the trolley wire sliding surface to a HIGH level, and the end of the trolley wire sliding surface and the outer shape of the trolley wire before and after that. a corresponding signal waveform in the region between the LOW level, further trolley wire wear by binarization by the binarization means provided on the trolley wire wear measuring device by a predetermined threshold value that the outer and HIGH level region obtained amount measuring apparatus of the detection signal in the gate, resulting waveform width obtained as the sum of the width of the LOW level before and after the HIGH level width and contrast detection signal in the gate is the new diameter Phase Whether it judged by judging means provided in the trolley wire wear measuring device, when the corresponding, which trolley wire wear measuring device determines the detection signal of the trolley line sliding surface thereof pulse signal It is.

FIG. 4 is a view for explaining the measurement principle of the trolley wire wear amount measuring method of the present invention.
First, the measurement principle will be described with reference to FIG. In addition, the same component as FIG. 5 is shown with the same code | symbol.
When the detection signal in the gate for obtaining the waveform of the trolley wire sliding surface 1a is binarized with a predetermined threshold, a detection waveform as shown in FIG. 4 can be obtained.
In FIG. 4, the reflector 3 is behind the trolley wire 1, but when the threshold value of the comparator of the binarization circuit is lowered, the reflector 3 and the trolley wire sliding surface 1 a of strong reflected light are saturated. The light from the outside of the trolley wire 1 having no reflector on the left side is incident and becomes “H”, and the noise waveform 4b before and after the waveform 4a of the trolley wire sliding surface 1a. Can be obtained.
In this case, a weak reflection from a region formed between the end of the trolley wire sliding surface 1a and the outer shape of the trolley wire 1 between the detection waveform 4a and the noise waveform 4b of the trolley wire sliding surface 1a. This is a detection signal in which a portion which is “L” is generated by receiving light or no reflected light in this region, and there are portions appearing as shadows 6 on both sides of the detection waveform 4a which is a pulse signal to be detected. . Since this portion is originally a falling region of the waveform, its width is usually ignored and is not related to the calculation of the diameter of the trolley wire.

The present invention focuses on the relationship between the width of the portion of the shadow 6 that is ignored and the pulse width of the trolley wire sliding surface 1a.
The width of the shadow 6 corresponds to a region formed between the end of the trolley wire sliding surface 1 a and the outer shape of the trolley wire 1. The width of the shadow 6 changes according to the wear of the trolley wire sliding surface 1a. The change reverses the amount of wear and increase / decrease in the trolley wire sliding surface 1a.
As a result, even if the trolley wire sliding surface 1a is worn, the sum of the pulse width of the detected waveform 4a of the trolley wire sliding surface 1a and the width of the shaded portion 6 is the diameter width of the trolley wire that is not always worn. It corresponds to (new wire diameter).
Therefore, in the present invention, in the pulse waveform of the detection signal as shown in FIG. 4, the width calculated from the sum of the pulse width of the detection waveform 4a and the width of the shadow 6 on both sides thereof is the new wire diameter (new line It is determined whether the detected waveform is that of the trolley wire sliding surface 1a.

That is, according to the present invention, the detection waveform by the reflected light from the trolley wire sliding surface is set to “H” with respect to the detection signal in the gate, and the end of the trolley wire sliding surface and the outer shape of the trolley wire before and after that The detection waveform by the reflected light from the area between the two is binarized with the detection signal of the trolley wire sliding surface part as a pulse signal so that each of them is “L” or vice versa. The waveform width (measurement width) obtained from the “H” width and the “L” width before and after the pulse signal, or the waveform width in which “H” and “L” are opposite to each other is substantially a new line. When the signal corresponds to the diameter, the pulse signal is determined as a detection signal for the trolley wire sliding surface. Thereby, the erroneous detection of the detection waveform of the trolley wire sliding surface can be reduced.
As a result, in the trolley wire wear amount measuring device, the amount of wear is such that a signal that is not a waveform of the trolley wire sliding surface is detected as a waveform of the trolley wire sliding surface due to the influence of disturbance noise. Incorrect calculation can be reduced.

FIG. 1 is a block diagram centering on a signal processing circuit of one embodiment to which a trolley wire wear amount measuring apparatus according to the present invention is applied, FIG. 2 is a flowchart of the trolley wire wear amount calculation processing, and FIG. It is explanatory drawing when there exists a waveform crack in the detection waveform of a sliding surface.
A light receiving element 10 receives the reflected light of the laser light 8 irradiated perpendicularly to the trolley wire sliding surface 1a via the mirror by the light projecting system 7.
11 is an amplifier that amplifies the signal from the light receiving element 10, 12 is a binarization circuit including a comparator 12 a that receives the signal from the amplifier 11 and binarizes it with a predetermined threshold, and 13 is a binarization circuit. An A / D conversion circuit (A / D) 14 that receives the output of the circuit 12 and digitizes the detection signal receives a signal from the A / D 13 and generates a distance pulse generated in accordance with the running of the vehicle. The rising / falling detection circuit 15 for detecting the rising / falling position of the waveform of the detection signal in response to the distance pulse receives the synchronizing signal from the data processor 16 and rises / falls from the rising / falling detection circuit 14. This is an interface that receives a fall detection signal, receives the new trolley wire diameter, and inputs it to the data processor 16.

Here, the binarization circuit 12 generates a detection signal in which the waveform of the shadow 6 as shown in FIG. 4 is generated on both sides of the detection waveform 4a of the trolley wire sliding surface 1a. 16 or manually, and the voltage value Vth is input to the reference voltage input terminal (−) of the comparator 12a. The A / D 13 receives the timing clock CLK having a predetermined cycle from the data processing device 16 and converts the waveform as shown in FIG. 4 into a digital value. The rise / fall detection circuit 14 detects the change point of the digital value from the data converted into the digital value, and when the change amount exceeds a certain value and increases, the rising flag data, for example, “11 When the change amount is not less than a certain value and decreases, falling flag data, for example, “10” is generated. When the data does not change, the signal is “00”.
These rising / falling data strings are sent from the interface 15 to the data processing device 16 for a predetermined period in accordance with the synchronization signal. The synchronization signal at this time is generated according to one measurement and is generated by the data processing apparatus 10 to determine the detection range of the detection signal.

The data processing device 16 is a so-called general-purpose personal computer or the like in which an external storage device 163 such as an MPU 161, a memory 162, and an HDD is connected to each other via a bus 164. The memory 162 includes a trolley wire sliding surface detection signal determination program 162a, a new wire diameter equivalent width calculation program 162b, a trolley wire remaining diameter equivalent width calculation program 162c, a gate setting program 162d, a threshold setting program 162e, and a sliding surface width. A data table 162f and the like are provided, and data on a new wire diameter that is currently measured and input via the interface 15, for example, 110 mm, 150 mm, and the like are stored.
The trolley wire sliding surface detection signal determination program 162a stored in the memory 162 of the data processing device 16 is executed by the MPU 161. The MPU 161 corresponds to the width of the trolley wire sliding surface 1a with respect to the detection signal in the gate. Such a detection signal waveform is detected. Further, the widths of the shadows 6 (see FIG. 4) of the falling portions on both sides are detected respectively, and the data of the detected three waveform widths are stored in a predetermined area of the memory 162 to calculate a new wire diameter equivalent width. The program 162b is called to obtain the total width of the three waveform widths extracted, and the calculated total width (= the width corresponding to the new wire diameter) corresponds to the new wire diameter of the trolley wire 1 being measured. Judge whether or not.

As a result, what does not correspond to the new wire diameter is determined not to be the detection waveform (pulse signal) of the trolley wire sliding surface 1a, and the next waveform is detected, and corresponds to the new wire diameter. Is determined as a detection waveform (pulse signal) of the trolley wire sliding surface, and the width data of the detection waveform (detection pulse) corresponding to the determined width of the trolley wire sliding surface is stored in the sliding surface width data table of the memory 162. Store and register in 162f. When a plurality of sliding surface width data are registered in the sliding surface width data table 162f, the correct sliding surface width data is determined and other data is deleted.
In the above case, first, a detection waveform having a width corresponding to the width of the trolley wire sliding surface 1a is detected, and then the width of the shadow 6 (see FIG. 4) of the falling portion on both sides thereof is detected. You may make it detect the width | variety of the whole waveform including the width | variety of the detection waveform of the trolley wire sliding surface 1a, and the width | variety of the shadow 6 of both sides, without detecting each. In this case, the new wire diameter equivalent width calculation program 162b is unnecessary, but in this embodiment, the width of the shadow 6 is one of the processes of the trolley wire sliding surface detection signal determination program 162a. It is determined whether or not it is in a range corresponding to a region formed between the end of 1a and the outer shape of the trolley wire 1. Therefore, the widths of the shadows 6 on both sides are individually detected. Thereby, the waveform detection accuracy can be improved.
Furthermore, the trolley wire sliding surface detection signal determination program 162a combines the detection waveforms before and after the trolley wire sliding surface detection waveform signal in the gate to form a single composite waveform, and in the composite waveform The same processing is performed, and the width data of the detection waveform (pulse signal) corresponding to the trolley wire sliding surface 1a is registered in the sliding surface width data table 162f.

The new wire diameter equivalent width calculation program 162b is called from the trolley wire sliding surface detection signal determination program 162a and executed by the MPU 161. The MPU 161 reads the width data of the three extracted waveforms from a predetermined area of the memory 162, The total width S between the waveform of the shadow 6 on both sides of FIG. 4 and the detected waveform 4a of the trolley wire sliding surface 1a is calculated by the following equation.
S = width of detected waveform of trolley wire sliding surface + width of front shadow + width of rear shadow Trolley wire remaining diameter equivalent width calculation program 162c is executed by MPU 161, and MPU 161 is a sliding surface width data table of memory 162. The width data of the waveform indicating the trolley wire sliding surface width is sequentially read from 162f, the width of the detected trolley wire sliding surface 1a is calculated, the trolley wire remaining diameter is calculated from this calculated value, and is output to the outside.
The gate setting program 162d is executed by the MPU 161, and the MPU 161 determines a position where the pulse waveform of the trolley wire sliding surface 1a is next with a predetermined width based on the position of the detected waveform of the previous trolley wire sliding surface 1a. The gate is set with a predetermined width as the center, the waveform data of the detection signal in that range is extracted and stored in a predetermined work area, and the trolley wire sliding surface detection signal determination program 162a is called.
The threshold setting program 162e is executed by the MPU 161, and the MPU 161 changes the threshold Vth sent to the binarization circuit 12 and sets it to an optimum value.

FIG. 2 is a flowchart of the trolley wire wear amount calculation processing by the data processing device 16.
First, the detection signal data sent in response to the synchronization signal is received via the interface 15 and a predetermined amount of data is stored in a predetermined area of the memory 162 (step 101). Next, the gate setting program 162d is executed by the MPU 161, and the position of the detection waveform of the previous trolley wire sliding surface is used as a reference and the pulse waveform of the detection signal of the trolley wire sliding surface is set to a predetermined position as a center. The gate is set by the width, the detection waveform data in the gate is extracted from the detection signal data stored in the predetermined area of the memory 162, and stored in the work area (step 102). Then, the trolley wire sliding surface detection signal determination program 162a is executed by the MPU 161 to read out the data of the detected waveform in the gate from the work area and correspond to the width of the trolley wire sliding surface 1a in the gate. And a waveform having a falling pulse width corresponding to the shadow 6 is detected (step 103). Next, the MPU 161 executes the new wire diameter equivalent width calculation program 162b to calculate the total width S corresponding to the new wire diameter (step 104), and whether or not the calculated total width S corresponds to the new wire diameter. Is determined (step 105). Here, the equivalent is to determine the range of the new wire diameter ± α. α is a range of determination error in consideration of variations in the new wire diameter. Therefore, when the value of α is small, the total width S is corresponding.
If the result is YES, width data corresponding to the pulse width of the trolley wire sliding surface 1a determined as YES at this time is registered as a detected waveform in the sliding surface width data table 162f (step 105a). Then, the process returns to step 103, the next waveform data is read from the work area, and the same processing is repeated.
In step 103, as indicated by a dotted line on the left indicating that the shadow width is inappropriate, the shadow 6 has a width corresponding to an area formed between the end of the trolley wire sliding surface 1a and the outer shape of the trolley wire 1. If the value is inappropriate or exceeds the width of the region, the process proceeds to step 106, where it is determined whether all of the inspection of the waveform of the detection signal is completed, and then to step 103. The process returns to the next detection waveform detection process.

On the other hand, if the determination in step 105 is NO, it is determined whether all the inspections of the waveform of the detection signal have been completed (step 106). If the inspection has not been completed, the process returns to step 103 and the processing from step 103 is performed. repeat. When there is no more data to be extracted in the gate, the determination in step 105 is NO.
If the result of determination in step 106 is YES, it is determined whether there are a plurality of pulse waveforms (step 107). If YES, the next detection signal in the gate is combined and combined with adjacent pulse waveforms. In the waveform, a pulse waveform corresponding to the width of the trolley wire sliding surface 1a is extracted as a detected waveform (step 108).
As shown in FIG. 3, the processing from step 107 to step 108 is because the detection waveform 4a corresponding to the trolley wire sliding surface 1a may cause waveform cracking due to the setting method of the threshold Vth and the influence of disturbance noise. is there. Therefore, the waveform that has been broken is processed as one waveform.
As a combination process for synthesizing waveform cracks in step 108, two adjacent pulse waveforms are synthesized into one pulse waveform, and a new wire diameter equivalent width is calculated for this. Furthermore, three adjacent pulse waveforms are combined into one pulse waveform, and a new wire diameter equivalent width is calculated for this. Four or more may be performed, but in most cases, leakage is eliminated by combining two and three combinations.
After this waveform synthesis processing, the MPU 161 executes the new wire diameter equivalent width calculation program 162b to calculate the total width S (corresponding to the new wire diameter waveform width) corresponding to the new wire diameter (step 109). It is determined whether or not the total width S corresponds to the new wire diameter (step 110). Here, when YES is determined and it is determined to be equivalent, the process proceeds to Step 110a, and similarly to the above, the pulse width data corresponding to the width of the trolley wire sliding surface 1a extracted in the sliding surface width data table 162f is obtained. The detected waveform is registered (step 110a). Then, the process returns to step 108, the next waveform data is read, and the same processing is repeated.

On the other hand, if the determination in step 110 is NO, it is determined whether all the combination inspections of the detection signal waveforms have been completed (step 111). If the inspection has not been completed, the process returns to step 108, and steps 108 to 111 are performed. Repeat the process up to. When the determination at step 111 is YES, the sliding surface width determination process after step 112 is entered.
In addition, when the determination in step 107 is NO, the sliding surface width determination process is entered.

In the sliding surface width determination process, first, in step 112, it is determined whether or not there is width data registered in the sliding surface width data table 162f. If YES, there is a plurality of registered numbers. (YES in step 113), if YES, a gate center search process is performed to detect the center position of the gate, and the width data at the center position of the gate is a regular pulse waveform corresponding to the sliding surface width. The width data is selected and other data is deleted (step 114). Then, the trolley wire remaining diameter equivalent width calculation program 162c is called to calculate the trolley wire remaining diameter (step 115), and the measurement result is output to the outside (step 116).
On the other hand, when NO in step 112, the width data corresponding to the sliding surface width is not detected. In this case, the pulse waveform at the center position of the gate is selected as the correct waveform (step 112a). ), The process proceeds to step 115, and the trolley wire remaining diameter is calculated. If NO in step 113, the routine proceeds to step 115, where the remaining trolley wire diameter is calculated (step 115) and output to the outside (step 116). Then, the number of times of NO in step 112 is counted, and when this number increases, the threshold value setting program 162e is executed by the MPU 161, and the threshold value Vth sent to the binarization circuit 12 is changed and reset to the optimum value. , Adjust the number of times to decrease.

As described above, in the embodiment, the detection waveform by the reflected light from the trolley wire sliding surface is set to “H”, and shadow portions before and after that (the end portion of the trolley wire sliding surface and the outer shape of the trolley wire and The detection waveform (by the reflected light from the area between) is binarized so as to become “L”, and the detection waveform including the shadows on both sides is taken as one, and the boundary portion is made to fall. Inverts the detection signal, sets the detection waveform due to the reflected light from the sliding surface of the trolley wire to “L”, sets the detection waveform of the shadow part before and after that to “H”, and includes the shadows on both sides Of course, it is also possible to make the boundary part rise.
In the embodiment, in step 103 or step 108, a pulse having a pulse width corresponding to the width of the trolley wire sliding surface is selected, and then the measurement width is determined from the width of the selected pulse and the width of the shadow before and after the selected pulse. Although calculated, the present invention does not select a pulse having a pulse width corresponding to the width of the sliding surface of the trolley line, in other words, without extracting a waveform in step 103 or step 108, the new line. Instead of calculating the diameter equivalent width, simply extract the waveform width as a single waveform, including the shadows on both sides of the total sum of the shadows on both sides of the pulse, and that is the new wire diameter It may be determined whether or not.
Further, in the embodiment, the threshold value of the binarization circuit is adjusted by the program processing in the data processing device 16 by the threshold setting program 162e, but this optimizes the threshold setting by monitoring the output of the binarization circuit. An automatic setting circuit may be provided.

FIG. 1 is a block diagram centering on a signal processing circuit of an embodiment to which a trolley wire wear amount measuring apparatus according to the present invention is applied. FIG. 2 is a flowchart of the trolley wire wear amount calculation processing. FIG. 3 is an explanatory diagram when there is a waveform crack in the detected waveform of the sliding surface. FIG. 4 is an explanatory view of the measurement principle of the trolley wire wear amount measuring method of the present invention. FIG. 5 is an explanatory diagram of a waveform of a detection signal when there is a reflector that generates a reflection signal close to the width of the trolley wire sliding surface in the vicinity of the trolley wire.

Explanation of symbols

1 ... Trolley wire, 1a ... Trolley wire sliding surface,
2 ... Measurement light, 3 ... Reflector,
4 ... Detection waveform, 5 ... Trolley wire remaining diameter,
6 ... Shadow, 7 ... Projection system, 8 ... Laser light,
10 ... light receiving element, 11 ... amplifier,
12 ... binarization circuit, 13 ... A / D conversion circuit (A / D),
14: Rise / fall detection circuit,
15 ... Interface,
16: Data processing device,
161 ... MPU, 162 ... memory,
162a ... Trolley wire sliding surface detection signal determination program,
162b ... New wire diameter equivalent width calculation program,
162c ... trolley wire remaining diameter equivalent width calculation program,
162d: Gate setting program,
162e ... Threshold setting program,
162f ... sliding surface width data table,
163 ... an external storage device,
164 ... Bus.

Claims (13)

In the trolley wire wear amount measuring method of the trolley wire wear amount measuring device for irradiating the trolley wire sliding surface, receiving the reflected light and measuring the wear amount of the trolley wire based on the received light signal,
The trolley wire wear amount measuring device sets a gate in a range where a detection waveform of the trolley wire sliding surface is obtained with respect to the light reception signal or an amplified signal so that reflected light from the trolley wire sliding surface is reflected. The corresponding signal waveform is set to HIGH level, the signal waveform corresponding to the region between the end of the trolley wire sliding surface before and after that and the outer shape of the trolley wire is set to LOW level, and the outside of the region is set to HIGH level. The trolley wire wear amount measuring device obtains a detection signal in the gate by binarizing by a binarization means provided in the trolley wire wear amount measuring device at a predetermined threshold value, and the obtained gate In the trolley wire wear amount measuring device, whether or not the waveform width obtained as the sum of the HIGH level width and the LOW level width before and after the detected signal corresponds to the new wire diameter is provided. The It is determined by the constant unit, when the corresponding, the trolley wire wear measuring device trolley wire wear amount measuring method for determining the detection signal of the trolley line sliding surface thereof pulse signal. The trolley wire sliding surface detection signal determining means provided in the trolley wire wear amount measuring device first selects a pulse signal having a pulse width corresponding to the width of the trolley wire sliding surface among the pulse signals in the gate , 2. The trolley wire wear amount measuring method according to claim 1, wherein the determination by the determination means is performed on the selected pulse signal. Said determination means result of the determination by, when the pulse signal corresponding to the new wire diameter in the gate is not present, the trolley wire sliding surface detection signal determining means by synthesizing a plurality of said pulse signal in the gate The trolley wire wear amount measuring method according to claim 2, wherein the determination is performed by the determination unit with respect to the pulse signal . 4. The method of measuring a trolley wire wear amount according to claim 3, wherein the binarization by the binarization means is performed by adjusting the predetermined threshold by a comparator capable of adjusting the predetermined threshold. 2. The new wire diameter equivalent width calculating means provided in the trolley wire wear amount measuring device calculates the waveform width as a sum of a HIGH level pulse waveform width and a LOW level waveform width on both sides thereof. The measuring method of trolley wire wear amount of description. 6. The trolley wire wear amount measuring method according to claim 5, wherein the trolley wire sliding surface detection signal determining means determines whether the waveform width of the LOW level is within a predetermined range that the region can take. The sum of the detection signal in the gate state, and are not the HIGH level and said LOW level is inverted, the waveform width obtained as the sum, the HIGH level width before and after the LOW level width and this The trolley wire wear amount measuring method according to claim 1 , wherein the determination means determines whether or not the waveform width obtained as the sum corresponds to a new wire diameter . In the trolley wire wear amount measuring device that irradiates the trolley wire sliding surface, receives the reflected light, and measures the wear amount of the trolley wire based on the received light signal,
A gate is set in a range where a detection waveform of the trolley wire sliding surface can be obtained with respect to the light reception signal or an amplified signal, and a signal waveform corresponding to reflected light from the trolley wire sliding surface is set to HIGH level. The signal waveform corresponding to the region between the end of the trolley wire sliding surface before and after the trolley wire and the outer shape of the trolley wire is set to a LOW level, and further binarized with a predetermined threshold value that sets the outside of the region to a HIGH level. A binarization circuit for obtaining a detection signal in the gate,
Determination means for determining whether or not a waveform width obtained as a sum of a HIGH level width and a LOW level width before and after the detection signal in the gate corresponds to a new wire diameter; With
An apparatus for measuring a trolley wire wear amount, wherein when the determination means determines that the waveform width corresponds to a new wire diameter, the pulse signal is determined as a detection signal of a trolley wire sliding surface.   Furthermore, it has a selection means for selecting a pulse signal having a pulse width corresponding to the width of the trolley wire sliding surface among the pulse signals in the gate, and the determination means uses the pulse signal selected by the selection means. The apparatus for measuring a trolley wire wear amount according to claim 8, wherein the determination is made on the trolley wire. Furthermore, it has a synthesizing unit that synthesizes a plurality of the pulse signals into one pulse signal, and as a result of the determination by the determining unit, when there is no pulse signal corresponding to the new wire diameter in the gate, The trolley wire wear amount according to claim 9, wherein the synthesizing unit synthesizes the plurality of pulse signals into one pulse signal, and the determination is performed on the one pulse signal synthesized by the determination unit. measuring device.   The trolley wire wear amount measuring apparatus according to claim 10, wherein the binarization circuit includes a comparator capable of adjusting the predetermined threshold.   9. The apparatus for measuring a trolley wire wear amount according to claim 8, wherein the waveform width is calculated as a sum of a HIGH level pulse waveform width and a LOW level waveform width on both sides thereof.   The detection signal in the gate is obtained by inverting the HIGH level and the LOW level, and the waveform width obtained as the sum is the sum of the width of the LOW level and the width of the HIGH level before and after it. The trolley wire wear amount measuring apparatus according to claim 8, wherein the obtained determination means determines whether or not the waveform width obtained as the sum corresponds to a new wire diameter.

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