Method for measuring pantograph lift and abnormality detection system

Abstract

To provide a method for measuring a pantograph lift and an abnormality detection system which measure a filament separated from a filament slid with a pantograph, and can accurately measure a lift.SOLUTION: There is provided a method for measuring a pantograph lift of a pantograph slid with an electric wire line, wherein the electric wire line includes a catenary wire which is supported by at least two support points in a measurement section and suspends a plurality of droppers, an auxiliary catenary wire which is supported on the droppers and suspends a plurality of hangers, and a trolley wire supported on the hangers, the pantograph is calculated on the basis of a time T1 at which the pantograph is brought into contact with the trolley wire and passes through a management section set inside the measurement section, tension TAx of the auxiliary catenary wire, dropper axial force dj(t) acting on the droppers, the inclination of the auxiliary catenary wire on both ends of the measurement section, and the static push-up force p0 of the pantograph.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a method for measuring pantograph lift force and a system for detecting an abnormality in the measured pantograph lift force. [Background technology]

[0002] Generally, the current collection mechanism of an electric train consists of an electric wire installed along the tracks and a pantograph attached to the vehicle, and electricity is supplied to the vehicle when the pantograph's upper part, a pantograph body, comes into contact with the electric wire.

[0003] The pantograph is equipped with a lifting mechanism that exerts a certain static upward force, which maintains contact between the pantograph head and the electric rail. In addition, since the pantograph is exposed to high-speed air currents when the train is traveling, an aerodynamic force proportional to the square of the flow velocity acts on the pantograph in the vertical direction while the train is traveling. In this specification, this type of aerodynamic force acting on the pantograph in the vertical direction is referred to as pantograph lift (or simply lift).

[0004] In this way, the hull is pressed against the contact line not only by the static upward force of the lifting mechanism but also by the pantograph lift force while the train is running, and slides against the contact line at high speed. It is also known that the hull wears and deforms due to contact with the contact line, and that the pantograph lift force changes as the hull deforms.

[0005] If the pantograph lift force exceeds a specified value, it may cause damage to the overhead contact line, and if it is too low, it may cause the pantograph to fail to collect current or to drop. For this reason, the pantograph lift force must always be maintained within an appropriate range. In addition, as railway speeds increase, the sensitivity of lift force characteristics is increasing, making it necessary to monitor changes in pantograph lift force.

[0006] Conventionally, as a method for calculating such pantograph lift force, a method is known in which the pantograph lift force is estimated using values ​​obtained from sensors installed on contact wires and hangers that constitute the electric rail, as disclosed in Patent Document 1. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2008-230322 A Summary of the Invention [Problem to be solved by the invention]

[0008] The invention described in Patent Document 1 is an invention that can estimate pantograph lift force using values ​​obtained from the overhead contact line on the ground equipment side. However, it requires the installation of multiple sensors on the contact wire, along which the pantograph slides at high speed, and in its vicinity, posing a problem in terms of the reliability of the monitoring equipment.

[0009] In addition, the estimated value of pantograph lift calculated by the invention described in Patent Document 1 has the problem that it is larger than the true value because it is a value obtained by ignoring the inertial force of the contact wire, which is a high-frequency component, in the calculation process.

[0010] Therefore, the present invention has been made in consideration of the above-mentioned matters, and has an objective of providing a method for measuring pantograph lift that can accurately measure the lift by installing a sensor on an upper wire away from the contact wire, or by acquiring images, etc. from a non-energized part.

[0011] Another object of the present invention is to provide an abnormality detection system that can detect an abnormality in pantograph lift force based on the value of pantograph lift force calculated by these measurement methods. [Means for solving the problem]

[0012] The present invention has been made to achieve the above object and has the following features.

[0013] The method for measuring pantograph lift according to the present invention is a method for measuring pantograph lift of a pantograph that slides on an electric train line, the electric train line being a measurement section (x 1 <x<x 2 The pantograph is supported by at least two support points within the measurement section and suspends a plurality of droppers, an auxiliary catenary is supported by the droppers and suspends a plurality of hangers, and a contact wire is supported by the hangers, and the pantograph comes into contact with the contact wire and passes through a control section set inside the measurement section. 1 (-T 1 / 2 <t<T 1 / 2) and the tension T of the auxiliary catenary Ax and the dropper axial force d acting on the dropper j (t) (j = 1, 2, , q), and the inclination (∂y Ax / ∂x x=x1 , ∂y Ax / ∂x x=x2 ) and the static lift force p of the pantograph 0 Based on the following formula

number

[0014] In the method for measuring pantograph lift according to the present invention, it is preferable that both ends of the measurement section are located between the second outermost hanger and the third outermost hanger from both ends of the control section.

[0015] The method for measuring pantograph lift according to the present invention is a method for measuring pantograph lift of a pantograph that slides on an electric train line, the electric train line being a measurement section (x 1 <x<x 6) and a contact wire that contacts the pantograph, and the time T for the pantograph to pass through a control section set inside the measurement section is 1 (-T 1 / 2 <t<T 1 / 2) and the tension T of the messenger wire M and the inclination (∂y M / ∂x x=x1 , ∂y M / ∂x x=x2 , ,∂y M / ∂x x=x6 ) and the static lift force p of the pantograph 0 Based on the following formula

number

[0016] In the pantograph lift measuring method according to the present invention, it is preferable that the catenary wire suspends a plurality of droppers, and both ends of the measurement section are located between the first dropper on the outside and the second dropper on the outside from both ends of the management section.

[0017] The method for measuring pantograph lift according to the present invention is a method for measuring pantograph lift of a pantograph that slides on an electric train line, the electric train line being a measurement section (x 1 <x<x 4 ) and a contact wire that contacts the pantograph, and the time T for the pantograph to pass through a control section set inside the measurement section is 1 (-T 1 / 2 <t<T 1 / 2), and the inclination (∂y M / ∂x x=x1 , ∂y M / ∂x x=x2 , ,∂y M / ∂xx=x4 ) and the static lift force p of the pantograph 0 Based on the following formula

number

[0018] The method for measuring pantograph lift according to the present invention is a method for measuring pantograph lift of a pantograph that slides on an electric train line, the electric train line being a measurement section (x 1 <x<x 8 ) and a contact wire that contacts the pantograph, and the time T for the pantograph to pass through a control section set inside the measurement section is 1 (-T 1 / 2 <t<T 1 / 2), and the inclination (∂y M / ∂x x=x1 , ∂y M / ∂x x=x2 , ,∂y M / ∂x x=x8 ) and the static lift force p of the pantograph 0 Based on the following formula

number

[0019] The method for measuring pantograph lift according to the present invention is a method for measuring the pantograph lift of a pantograph sliding against an overhead contact line, the overhead contact line including a catenary supported by at least two support points within a measurement section and a contact wire in contact with the pantograph, and a time T for the pantograph to pass through a control section set inside the measurement section is measured. 1 (-T 1 / 2 <t<T 1 / 2) and the bearing capacity of all the support points in the measurement section (f s1 , f s2 ) and the static lift force p of the pantograph 0Based on the following formula

number

[0020] The method for measuring pantograph lift according to the present invention is a method for measuring the pantograph lift of a pantograph sliding against an overhead contact line, the overhead contact line including a catenary supported by at least four support points within a measurement section and a contact wire in contact with the pantograph, and a time T for the pantograph to pass through a control section set inside the measurement section is measured. 1 (-T 1 / 2 <t<T 1 / 2) and the bearing capacity of all the support points in the measurement section (f s1 ,f s2 ,f s4 ) and the static lift force p of the pantograph 0 Based on the following formula

number

[0021] The pantograph lift abnormality detection system of the present invention is a pantograph lift abnormality detection system for a pantograph that slides along an overhead contact line, the overhead contact line comprising a catenary supported by at least two support points within a measurement section and suspending a plurality of droppers, an auxiliary catenary supported by the droppers and suspending a plurality of hangers, and a trolley wire supported by the hangers, the pantograph comprises a passage detection device that contacts the trolley wire and detects when the pantograph passes through a control section set inside the measurement section, an axial force detection device that detects a dropper axial force acting on the dropper, and an inclination detection device that detects an inclination of the auxiliary catenary at both ends of the measurement section, and is characterized in that the system is equipped with a lift calculation means that calculates the pantograph lift, an abnormality determination means that determines whether the pantograph lift calculated by the lift calculation means is within a predetermined range, and an alarm means that issues an alarm regarding an abnormality detected by the abnormality determination means.

[0022] In the pantograph lift abnormality detection system according to the present invention, it is preferable that both ends of the measurement section are located between the second outermost hanger and the third outermost hanger from both ends of the management section.

[0023] The pantograph lift abnormality detection system of the present invention is a pantograph lift abnormality detection system for a pantograph that slides along an overhead contact line, the overhead contact line comprising a catenary supported by at least two support points within a measurement section and a contact wire in contact with the pantograph, a passage detection device that detects when the pantograph passes through a control section set inside the measurement section, and an inclination detection device that detects the inclination of the catenary at both ends of the measurement section and in the left and right vicinity of all of the support points within the measurement section, and is characterized in that the system is equipped with a lift calculation means that calculates the pantograph lift, an abnormality determination means that determines whether the pantograph lift calculated by the lift calculation means is within a predetermined range, and an alarm means that issues an alarm regarding an abnormality detected by the abnormality determination means.

[0024] In the pantograph lift abnormality detection system of the present invention, it is preferable that the catenary wire suspends a plurality of droppers, and both ends of the measurement section are located between the first dropper on the outside and the second dropper on the outside from both ends of the management section.

[0025] The pantograph lift abnormality detection system of the present invention is a pantograph lift abnormality detection system for a pantograph that slides along an overhead contact line, wherein the overhead contact line comprises a catenary supported by at least two support points within a measurement section and a contact wire in contact with the pantograph, a passage detection device that detects when the pantograph passes through a control section set inside the measurement section, and an inclination detection device that detects the inclination of the catenary in the left and right vicinity of all of the support points within the measurement section, and is characterized in that the system is equipped with a lift calculation means that calculates the pantograph lift, an abnormality determination means that determines whether the pantograph lift calculated by the lift calculation means is within a predetermined range, and an alarm means that issues an alarm regarding an abnormality detected by the abnormality determination means.

[0026] In the pantograph lift abnormality detection system according to the present invention, it is preferable that the catenary is supported by at least four support points within the measurement section.

[0027] The pantograph lift abnormality detection system of the present invention is a pantograph lift abnormality detection system for a pantograph that slides along an overhead contact line, wherein the overhead contact line comprises a catenary supported by at least two support points within a measurement section and a contact wire in contact with the pantograph, a passage detection device that detects when the pantograph passes through a control section set inside the measurement section, and a support force detection device that detects the support forces of all of the support points within the measurement section, and is characterized in that the system is equipped with a lift calculation means that calculates the pantograph lift, an abnormality determination means that determines whether the pantograph lift calculated by the lift calculation means is within a predetermined range, and an alarm means that issues an alarm regarding an abnormality detected by the abnormality determination means.

[0028] In the pantograph lift abnormality detection system according to the present invention, it is preferable that the catenary is supported by at least four support points within the measurement section.

[0029] The above summary of the invention does not list all of the features necessary for the present invention, and any subcombination of these features may also constitute an invention. Effect of the Invention

[0030] According to the present invention, it is possible to measure the pantograph lift with high accuracy without installing sensors on or near the contact wire where the pantograph slides at high speed, and by installing fewer sensors than in the conventional method. In addition, it is possible to determine whether the measured pantograph lift is abnormal and to issue an alarm if an abnormality is detected, thereby preventing malfunction of the current collecting mechanism caused by changes in the pantograph lift in advance. [Brief description of the drawings]

[0031] [Figure 1] 1A and 1B are schematic diagrams showing an example of the structure of an overhead contact line used in the pantograph lift measuring method of the present invention, in which (a) is a compound overhead contact line and (b) is a simple overhead contact line. [Diagram 2] FIG. 2 is a schematic diagram showing an example of a train line structure, illustrating the contact force acting on a contact wire and the axial force acting on a hanger. [Diagram 3] FIG. 2 is a schematic diagram showing an example of a train line structure, illustrating an axial force applied to a hanger and an axial force applied to a dropper. [Figure 4] FIG. 2 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift using the AxW method of the present invention. [Diagram 5] FIG. 2 is a schematic diagram showing an example of a catenary structure, illustrating an axial force applied to a dropper and an inclination of a catenary wire. [Figure 6] FIG. 2 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift using the MW method of the present invention. [Figure 7] FIG. 2 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift using the MWS method of the present invention. [Figure 8] FIG. 2 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift using the MWS+ method of the present invention. [Figure 9] Schematic diagram showing a simulation model of the contact line and pantograph. [Figure 10] Reference diagram showing a simulation model of a pantograph. [Figure 11] These are the results of a simulation to confirm the hanger axle force. (a) is the hanger axle force in the right half of the span before the controlled section. (b) is the result of applying a moving average filter of the time it takes for the pantograph to travel through the controlled section (approximately 0.5 s) to the same hanger axle force. (c) is a graph showing the time history data of the hanger axle force in the left half of the span after the controlled section. [Figure 12] These are the results of a simulation to confirm the dropper axial force. (a) is the dropper axial force of the span before the controlled section. (b) is the result of applying a moving average filter of the time it takes for the pantograph to travel through the controlled section (approximately 0.5 s) to the same dropper axial force. (c) is a graph showing the time history data of the dropper axial force of the span after the controlled section. [Figure 13] The graph shows the results of measuring the lift force of the pantograph under each condition, where (a) is the AxW method, (b) is the MW method, (c) is the MWS method, and (d) is the MWS+ method, organized as characteristics against speed. [Figure 14] FIG. 1 shows the measurement results of the pantograph lift force under each condition, where (a) is the AxW method, (b) is the MW method, (c) is the MWS method, and (d) is a graph showing a comparison of the measurement results using the MWS+ method with the simulation results, and (e) is a graph showing the results of calculating the root mean square error for each measurement method. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0032] Preferred embodiments for carrying out the present invention will be described below with reference to the drawings. Note that the following embodiments do not limit the inventions according to the claims, and all of the combinations of features described in the embodiments are not necessarily essential to the solution of the invention.

[0033] [Contact line and pantograph configuration] Fig. 1 shows an example of the structure of an electric train line used in the pantograph lift measurement method of the present invention, where (a) is a schematic diagram showing a compound electric train line and (b) is a schematic diagram showing a simple electric train line. In this specification, the left-right direction is the running direction of a pantograph running along the track, and is defined as the X direction shown in Figs. 1 to 9. In addition, in this specification, the up-down direction is defined as the Y direction shown in Figs. 1 to 9. Note that the schematic diagrams shown in Figs. 1 to 9 show a part of the electric train line in the X direction.

[0034] As shown in Figs. 1(a) and 1(b), the contact line 1, which is a compound contact line, and the contact line 1', which is a simple contact line, are supported by support points 2 installed at predetermined intervals along the track and extend in the X direction.

[0035] The overhead contact line 1 includes a catenary M, a dropper D, an auxiliary catenary Ax, a hanger H, and a trolley wire Tr. The overhead contact line 1′ includes a catenary M, a hanger H, and a trolley wire Tr.

[0036] The contact wires 1, 1' are supported by at least two support points 2. In addition, tension adjusting devices (not shown) are provided at both ends of the contact wires 1, 1' in the X direction, and a predetermined tension is applied to the contact wires 1, 1' in the X direction.

[0037] In this specification, it is assumed that a current flows through each of the wires constituting the electric rails 1, 1', and each of the wires constituting the electric rails 1, 1' is defined as a current-carrying section.

[0038] The support point 2 is installed on a support pole or the like (not shown) and supports the messenger wire M. Furthermore, a sensor such as a load cell capable of detecting the supporting force can be installed at the support point 2 as necessary. In this specification, such a device capable of detecting the supporting force acting on the support point 2 is referred to as a supporting force detection device.

[0039] The catenary wire M extends along the X direction and is tensioned by a tension adjusting device. The catenary wire M of the catenary wire 1 suspends a plurality of droppers D, and the catenary wire M of the catenary wire 1' suspends a plurality of hangers H.

[0040] As shown in FIG. 1(a), the droppers D are suspended at equal intervals along the X direction. As an example, the droppers D are suspended at positions spaced apart from the support point 2 in the X direction. Each of the droppers D can be equipped with a sensor such as a load cell capable of detecting an axial force, as necessary. In this specification, such a device capable of detecting an axial force acting on the dropper D is referred to as an axial force detection device. The droppers D support the auxiliary messenger wire Ax at their lower ends.

[0041] As shown in Fig. 1(a), the auxiliary messenger wire Ax extends along the X direction and suspends a plurality of hangers H. A predetermined tension is applied to the auxiliary messenger wire Ax by a tension adjusting device.

[0042] 1(a) and 1(b), the hangers H are suspended at equal intervals along the X direction. As an example, the hangers H of the contact line 1 are suspended at positions spaced apart in the X direction from the dropper D, and the hangers H of the contact line 1' are suspended at positions spaced apart in the X direction from the support point 2. The hangers H support the contact wire Tr at their lower ends.

[0043] 1(a) and (b), the trolley wire Tr extends along the X direction and contacts a pantograph body 3a attached to the upper part of a pantograph 3 (described later) to supply electricity to a vehicle. A predetermined tension is applied to the trolley wire Tr by a tension adjusting device.

[0044] The pantograph 3 includes a head 3a that is attached to the top of the pantograph 3 and comes into contact with the trolley wire Tr, and a lifting mechanism 3b that exerts a predetermined static lifting force to maintain contact between the head 3a and the trolley wire Tr. The lifting mechanism 3b is, for example, composed of a coil spring, and is adjusted by regular maintenance to exert a constant static lifting force.

[0045] In this specification, the measurement section is defined as a section in the X direction where sensors and the like are installed on the contact lines 1, 1' to detect various measurement values ​​of the wire. The control section is defined as a section in the X direction set inside the measurement section where the pantograph lift force is tallied. In this embodiment, as an example, one span between adjacent support points 2 is defined as the control section.

[0046] [First embodiment] The method for measuring the pantograph lift force according to the first embodiment described below is to measure the tension T Ax In this specification, the method for measuring the pantograph lift according to the first embodiment is referred to as an AxW (Auxiliary Wire) method.

[0047] FIG. 2 is a schematic diagram showing an example of a contact line structure, the contact force acting on a contact wire and the axial force acting on a hanger. FIG. 3 is a schematic diagram showing an example of a contact line structure, the axial force acting on a hanger and the axial force acting on a dropper. FIG. 4 is a schematic diagram showing an example of a contact line structure and a sensor arrangement used in the method for measuring pantograph lift force using the AxW method of the present invention.

[0048] First, as shown in Fig. 2, the behavior of the contact wire Tr is expressed as the tension T Tr The equation of motion is formulated as a string acting on the

[0049] The contact force applied to the contact wire Tr from the pantograph 3 is regarded as a concentrated load fc(t), and ρ Tr is the linear density of the contact wire Tr, and x i is the coordinate of the i-th hanger H point, h i If (t) is the axial force acting on the i-th hanger H (the force in the compression direction of the hanger H), v is the train speed, and δ is the Dirac delta function, the behavior of the contact wire Tr is Tr (x,t) can be expressed as equation (1).

[0050]

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[0051] Assuming that the length of the controlled section is L and that there is one pantograph 3 in the controlled section, by integrating equation (1) over the controlled section, we obtain the exact solution of equation (2) for the contact force.

[0052]

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[0053] Here, the first term on the right side of equation (2) is the total hanger axial force in the controlled section, the second term on the right side is the inertia force of the contact wire Tr in the controlled section, and the third term on the right side is the vertical component of the contact wire tension acting on the boundary of the controlled section. Tr / ∂x x=+L / 2 , ∂y Tr / ∂x x=-L / 2 are the inclinations of the contact wire Tr at both ends of the control section, respectively.

[0054] Next, as shown in Fig. 3, the behavior of the auxiliary messenger wire Ax is examined by suspending p hangers H and supporting q droppers D with tension T Ax The equation of motion is formulated as a string acting on the

[0055] ρ Ax The line density of the auxiliary catenary wire Ax, x hat j Let D be the coordinates of the j-th dropper point, d j If (t) is the axial force acting on the j-th dropper D (the force in the compression direction of the dropper D), the behavior of the auxiliary messenger wire Ax is Ax (x,t) can be expressed as in equation (3).

[0056]

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[0057] Similarly to equation (2), by integrating equation (3) over the control interval of length L, we obtain equation (4).

[0058]

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[0059] Here, ∂y Ax / ∂x x=+L / 2 , ∂y Ax / ∂x x=-L / 2 are the inclinations of the auxiliary catenary wire Ax at both ends of the controlled section, respectively.

[0060] By substituting equation (4) into equation (2) and eliminating the term for the hanger axial force, the exact solution for the contact force in the case of the auxiliary messenger wire Ax is given by equation (5).

[0061]

number

[0062] Here, the time T when the pantograph 3 passes through the controlled section 1 (-T 1 / 2 <t<T 1 / 2), the static upward force p of the pantograph is calculated from the average contact force. 0 The value excluding the lift force f L Then, the exact solution for lift is given by equation (6).

[0063]

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[0064] Here, if the integration range of the contact wire Tr in deriving equation (2) is taken to be infinite on both sides of the X-direction, the fifth term on the right-hand side of equation (5), which is the vertical component of the contact wire tension acting on the boundary of the integration interval, converges to zero. Furthermore, if the second and third terms on the right-hand side, which are the inertial forces of the contact wire Tr and the auxiliary messenger wire Ax, are ignored, the approximate solution for the lift force becomes equation (7).

[0065]

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[0066] In this approximate solution, since the integral ranges of the contact wire Tr and the auxiliary catenary Ax are different, even if the pantograph 3 is located within the controlled section, a force may act on the auxiliary catenary Ax outside the controlled section via the hanger H. If the hanger axial force acts on the auxiliary catenary Ax outside the controlled section, the premise of eliminating the term of the hanger axial force when deriving the formula (5) does not hold, which may become a cause of error. Therefore, the measurement section of the auxiliary catenary Ax needs to be set wider than the control section of the lift. Therefore, in this embodiment, the control section is left as one span as shown in FIG. 4, and the measurement section is set to include the outside of the one span. The range of the effective measurement section will be explained based on the simulation results in the explanation of the validity of each measurement method described later. At this time, the approximate solution of the lift is corrected as shown in the formula (8).

[0067]

number

[0068] In this way, the method for measuring the pantograph lift using the AxW method can calculate the pantograph lift without installing sensors on the contact wire Tr along which the pantograph 3 slides at high speed. Also, the method for measuring the pantograph lift using the AxW method can reduce the number of sensors required compared to the conventional method for estimating the pantograph lift, which requires installing sensors on the hanger H.

[0069] The time it takes for the pantograph 3 to pass through the controlled section can be measured by a known method, but as one example, the passage of the pantograph 3 may be detected by a proximity sensor installed at the entrance and exit of the controlled section, or the passage of the pantograph 3 may be detected by an image taken by a camera installed in a non-energized section. In this specification, such a device capable of detecting the passage of the pantograph 3 through the controlled section is referred to as a passage detection device.

[0070] The inclination of the auxiliary messenger wire Ax can be measured by a known method, for example, two accelerometers may be installed adjacent to the measurement point and the inclination may be calculated from the acceleration obtained, or the inclination may be measured from an image taken by a camera installed in a non-energized part. In this specification, such a device capable of detecting the inclination of the wires of the overhead contact wires 1, 1' is called an inclination detection device.

[0071] [Second embodiment] The method for measuring the pantograph lift force according to the second embodiment described below is to measure the tension T M In this specification, the method for measuring the pantograph lift according to the second embodiment is referred to as the MW (Messenger Wire) method.

[0072] The method for measuring pantograph lift according to the second embodiment will be described below using an electric trolley 1, which is a compound overhead contact line, as an example. The same or similar members as those in the first embodiment described above are denoted by the same reference numerals and detailed descriptions thereof will be omitted.

[0073] FIG. 5 is a schematic diagram showing an example of the structure of an overhead contact line, illustrating the axial force applied to a dropper and the inclination of the catenary. FIG. 6 is a schematic diagram showing an example of the structure of an overhead contact line and the arrangement of sensors used in the method for measuring pantograph lift by the MW method of the present invention.

[0074] As shown in Fig. 5, the behavior of the messenger wire M is expressed as the tension T M The equation of motion is formulated as a string acting on the

[0075] ρ M If the linear density of the catenary M is y, the behavior of the catenary M is M (x,t) can be expressed as in equation (9).

[0076]

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[0077] (9) is applied to the x shown in Figure 5, avoiding the support point 2 of the messenger wire M, which is a fixed point. 1 From x 2 By integrating between , we obtain equation (10).

[0078]

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[0079] By substituting equation (10) into equation (5) and eliminating the term for the dropper axial force, the exact solution for the contact force in the case of messenger wire M becomes equation (11), and the exact solution for the lift force becomes equation (12).

[0080]

number

[0081]

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[0082] Here, if the integration ranges of the auxiliary catenary wire Ax and the contact wire Tr in deriving equations (4) and (2) are taken to be infinite on both sides of the X direction, respectively, the fifth and sixth terms of equation (12) converge to zero. Furthermore, if the first to third terms, which are the inertial forces of the catenary wire M, the auxiliary catenary wire Ax, and the contact wire Tr, are ignored, the approximate solution for the lift force becomes equation (13).

[0083]

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[0084] Here, as in the first embodiment of the AxW method for measuring the lift, the integral range of the messenger wire M is different from that of the auxiliary messenger wire Ax and the contact wire Tr in formula (13). Therefore, even if the pantograph 3 is located within the controlled section, an error may occur due to the force acting on the messenger wire M outside the controlled section via the dropper D. Therefore, the controlled section should be set to one span as shown in FIG. 6, and the measurement section should be set to include the outside of the one span. However, if the integral range of the messenger wire M crosses the support point 2, it becomes necessary to consider the supporting force from the support point 2 to the messenger wire M. However, this force is quasi-statically balanced with the vertical components of the tension of the messenger wire M at both ends near the support point 2, so the integral of the messenger wire M near the support point 2 can be ignored. From the above, the measurement range of the messenger wire M is set to the range shown in FIG. 6 excluding the support point 2, and the approximate solution of the lift is corrected as shown in formula (14).

[0085]

number

[0086] As in the first embodiment, the range of the effective measurement section will be described based on simulation results in the description of the validity of each measurement method, which will be described later.

[0087] In this way, the method for measuring the pantograph lift using the MW method can calculate the pantograph lift without installing sensors on the contact wire Tr along which the pantograph 3 slides at high speed. Moreover, the method for measuring the pantograph lift using the MW method can reduce the number of sensors required compared to the conventional method for estimating the pantograph lift, which requires installing sensors on the hanger H.

[0088] Moreover, the method for measuring the pantograph lift force by the MW method only requires that the inclination of six points of the messenger wire M be measured by an inclination detection device, and the inclination detection device may be a camera installed in a non-energized part or a plurality of line sensor cameras, etc. In this way, the method for measuring the pantograph lift force by the MW method also makes it possible to measure the lift force without placing a sensor in the energized part.

[0089] In addition, the method for measuring the pantograph lift by the MW method measures the lift by focusing on the inclination of six points of the catenary M, so it can be applied not only to the catenary 1, which is the above-mentioned compound catenary, but also to the catenary 1', which is a simple catenary that does not have the dropper D and the auxiliary catenary Ax.

[0090] [Third embodiment] A method for measuring pantograph lift according to a third embodiment will be described below, which is a method for calculating the pantograph lift based on an equation of motion focusing on the motion of the catenary wire M in the vicinity of the support point 2. In this specification, the method for measuring pantograph lift according to the third embodiment is referred to as the MWS (Messenger Wire around Support) method.

[0091] The method for measuring pantograph lift according to the third embodiment will be described below by taking the electric trolley 1, which is a compound overhead contact line, as an example. The same or similar members as those in the first and second embodiments are denoted by the same reference numerals and detailed descriptions thereof will be omitted.

[0092] FIG. 7 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift by the MWS method of the present invention.

[0093] As shown in Figure 7, the bearing force f s1 and f s2 Behavior of the catenary wire M supported by y M Consider (x,t). In this case, x 2 x 3 The inertia force of the catenary wire M between the two, and x 2 Point and x 3 The vertical component of tension in the messenger wire M at point x 2 x 3 Since the sum of the dropper forces between the two sections is balanced, the motion in this section can be ignored and can be expressed as equation (15).

[0094]

number

[0095] Regarding equation (15), if we limit the discussion to quasi-static cases and ignore the first and second terms, which represent the inertial force of the messenger wire M, the contact force becomes equivalent to the support force of the messenger wire at support point 2, and the approximate solution for the contact force becomes equation (16).

[0096]

number

[0097] Therefore, the approximate solution for lift is equation (17).

[0098]

number

[0099] In this way, the method for measuring the pantograph lift using the MWS method can calculate the pantograph lift without installing sensors on the contact wire Tr along which the pantograph 3 slides at high speed. Also, the method for measuring the pantograph lift using the MWS method can reduce the number of sensors required compared to the conventional method for estimating the pantograph lift, which requires installing sensors on the hanger H.

[0100] Furthermore, similar to the method for measuring pantograph lift by the MW method, the method for measuring pantograph lift by the MWS method only requires that the inclination of the messenger wire M can be measured with an inclination detection device, and the inclination detection device may be a camera installed in a non-energized part or a plurality of line sensor cameras, etc. In this way, the method for measuring pantograph lift by the MWS method also makes it possible to measure the lift without placing a sensor in the energized part.

[0101] In addition, since the method for measuring the pantograph lift using the MWS method measures the lift by focusing on the inclination of the catenary wire M, it can be applied not only to the catenary wire 1, which is the above-mentioned compound catenary wire, but also to the catenary wire 1', which is a simple catenary wire that does not have the dropper D and the auxiliary catenary wire Ax.

[0102] In addition, it can be seen that the same result is obtained by obtaining the sum of the loads at support point 2 of messenger wire M from equation (16). In this case, the approximate solution for the lift force is equation (18).

[0103]

number

[0104] In this way, according to the method of measuring the pantograph lift force using equation (18), it is only necessary to install a support force detection device so that the support force of support point 2 can be detected, and the number of sensors can be reduced compared to conventional methods of estimating pantograph lift force.

[0105] In addition, the method of measuring the pantograph lift using equation (18) measures the lift by focusing on the supporting force of the support point 2, so it can be applied not only to the overhead contact line 1, which is the above-mentioned compound overhead contact line, but also to the overhead contact line 1', which is a simple overhead contact line.

[0106] [Fourth embodiment] The method for measuring pantograph lift according to the third embodiment described above is a measurement method based on an equation of motion that focuses on the movement of the catenary M near two support points 2. However, as with the methods for measuring pantograph lift according to the first and second embodiments described above, if a dropper force acts on the catenary M outside the measurement section, this can become a source of error.

[0107] A method for measuring pantograph lift according to a fourth embodiment, which will be described next, is different from the method for measuring pantograph lift according to the third embodiment in that a measurement section for measuring the inclination of the catenary wire M is set wider, and the pantograph lift is calculated based on an equation of motion that focuses on the motion of the catenary wire M in the vicinity of four support points 2. In this specification, the method for measuring pantograph lift according to the fourth embodiment is referred to as the MWS+ method.

[0108] The method for measuring pantograph lift according to the fourth embodiment will be described below using the electric trolley 1, which is a compound overhead contact line, as an example. The same or similar members as those in the first to third embodiments described above are denoted by the same reference numerals and detailed descriptions thereof will be omitted.

[0109] FIG. 8 is a schematic diagram showing an example of the structure of an electric rail and the arrangement of sensors used in the method for measuring pantograph lift by the MWS+ method of the present invention.

[0110] When a catenary wire M supported at four support points 2 as shown in FIG. 8 is examined using a method similar to the pantograph lift measurement method according to the third embodiment, an approximate solution for the lift can be expressed as in equation (19).

[0111]

number

[0112] In this way, the method of measuring pantograph lift using the MWS+ method, like the method of measuring pantograph lift using the MWS method, can measure the lift without installing a sensor on the wire close to the contact wire Tr or without placing a sensor on the energizing unit.

[0113] In addition, the method of measuring pantograph lift force using the MWS+ method, like the method of measuring pantograph lift force using the MWS method, can be applied not only to the overhead contact line 1, which is the above-mentioned compound overhead contact line, but also to the overhead contact line 1', which is a simple overhead contact line.

[0114] Similarly to equation (18), an approximate solution for the lift can be obtained by obtaining the sum of the loads at support point 2 of messenger wire M. In this case, the approximate solution for the lift is given by equation (20).

[0115]

number

[0116] In this way, according to the method of measuring the pantograph lift force using equation (20), it is only necessary to install a support force detection device so that the support force of support point 2 can be detected, and the number of sensors can be reduced compared to conventional methods of estimating the pantograph lift force.

[0117] Furthermore, the method of measuring the pantograph lift force using equation (20), like the method of measuring the pantograph lift force using equation (18), can be applied not only to the overhead contact line 1, which is the above-mentioned compound overhead contact line, but also to the overhead contact line 1', which is a simple overhead contact line.

[0118] [Validity of the measurement method] Next, the validity of the method for measuring the pantograph lift force according to each embodiment will be described using a comparison with simulation results.

[0119] [Contact line and pantograph conditions] Fig. 9 is a schematic diagram showing a simulation model of the electric rail and the pantograph, and Fig. 10 is a reference diagram showing a simulation model of the pantograph. Note that the pantograph 3 runs from left to right in the X direction as viewed in Fig. 9, and the front of the management section is the position on the left side of the management section in the X direction, and the rear of the management section is the position on the right side of the management section in the X direction.

[0120] In the simulation, the overhead contact line 1 shown in Fig. 9 is divided into a system of many concentrated mass points, and the equation of motion of each mass point in the vertical direction is approximated as a multidimensional simultaneous second-order differential equation. A numerical solution is then sequentially obtained together with the equation of motion of the pantograph 3, which will be described later.

[0121] In the simulation, as an example, the contact line 1 is a heavy compound catenary with 10 consecutive 45m spans, the contact wire Tr is suspended at equal intervals from the auxiliary catenary Ax by eight hangers H every 5.6m, and the auxiliary catenary Ax is suspended at equal intervals from the catenary M by four droppers D every 11.2m. The mass of each of the hangers H and droppers D is set to 0.2kg. At each support point, a curved pull-off arm is installed to restrain the contact wire Tr and the auxiliary catenary Ax in the horizontal direction perpendicular to the track. The control section for verifying the lift force measurement method is set to the 6th span (Span No.6).

[0122] As shown in FIG. 10, the simulation model of the pantograph 3 is expressed by two concentrated mass points, a spring, and a damper, and an equation of motion for the mass points is formed.

[0123] As shown in Fig. 9, the running direction of the pantograph 3 is limited to a fluttering running in which the intermediate hinge of the frame is in the forward position, and one pantograph 3 is lifted per one train. The static lifting force p 0 is 54N, and furthermore, when the pantograph 3 is running, the upward lift force p 0 Taking into account the increase in the aerodynamic lift coefficient CL of pantograph 3 under standard conditions is set to a design value of 0.00035N / (km / h). 2 Let us assume that.

[0124] [Consideration of measurement conditions for approximate solutions] First, the effective measurement range when using the approximate solution of Equation (8) related to the AxW method will be examined using the results of a simulation under conditions in which the pantograph 3 is traveling.

[0125] As mentioned above, when applying the approximate solution, if a force acts on the wire to be measured via the hanger H outside the measurement section, this will become a cause of error. Therefore, we will check how the axial force of the hanger H changes before and after the pantograph 3 passes through the control section.

[0126] Figure 11 shows the results of a simulation to confirm the hanger axial force when the pantograph 3 runs at a speed of 320km / h, where Fig. 11(a) shows the hanger axial force in the right half of the span before the controlled section, Fig. 11(b) shows the result of applying a moving average filter for the time (about 0.5s) that the pantograph runs through the controlled section to the hanger axial force, and Fig. 11(c) is a graph showing the time history data of the hanger axial force in the left half of the span after the controlled section. The horizontal axis of Fig. 11 is the mass point number of the position where the pantograph is located, and the hanger number is as shown in Fig. 11.

[0127] From Fig. 11(a), it can be confirmed that the hanger axial forces before the controlled section, all of the axial forces of the fifth hanger (No. 37) to the eighth hanger (No. 40), fluctuate due to the residual vibration after the pantograph 3 passes by when the pantograph 3 is located at the start point of the controlled section (mass point number 1125). However, from point B in Fig. 11(b), which calculates the moving average of the time that the pantograph 3 travels through the controlled section from each mass point, it can be confirmed that only the seventh hanger (No. 39) and the eighth hanger (No. 40) have a significant average value of the hanger axial forces during the time that the pantograph passes through the controlled section from mass point 1125, and that the other hanger axial forces are less affected. This is because the time average value of the residual vibration of the hanger axial forces after a sufficient amount of time has passed since the passage of the pantograph 3 is almost zero.

[0128] From point C in Figure 11(c), it can be confirmed that when pantograph 3 is located at the end of the controlled section (mass point number 1349), only the axial forces of the first hanger (No. 49) and the second hanger (No. 50) are fluctuating, and the axial forces of the other hangers are not fluctuating.

[0129] From the above, in order to allow the hanger axial forces at the front and rear of the controlled section to take into account two hangers H each in equation (8), it is preferable that the measurement sites of the auxiliary messenger wire Ax are located at the positions shown in Fig. 4. That is, in the method for measuring pantograph lift force using the AxW method, it is preferable that the measurement points for the inclination of the auxiliary messenger wire Ax, which are both ends of the effective measurement section, are located between the second outer hanger H and the third outer hanger H from both ends of the controlled section.

[0130] Next, the effective measurement range when using the approximate solution of equation (14) related to the MW method will be explained using the results of a simulation under the condition that the pantograph 3 is running.

[0131] As mentioned above, when applying the approximate solution, if a force acts on the wire to be measured via the dropper D outside the measurement section, this will become a cause of error. Therefore, we will check how the axial force of the dropper D changes before and after the pantograph 3 passes through the control section.

[0132] Fig. 12 shows the results of a simulation to confirm the dropper axial force when the pantograph 3 runs at a speed of 320km / h, where Fig. 12(a) shows the dropper axial force of the span before the controlled section, Fig. 12(b) shows the result of applying a moving average filter for the time (about 0.5s) that the pantograph runs through the controlled section to the dropper axial force, and Fig. 12(c) shows a graph showing the time history data of the dropper axial force of the span after the controlled section. The horizontal axis of Fig. 12 shows the mass point number of the position where the pantograph is located, and the dropper number is as shown in Fig. 9.

[0133] From point D in Figure 12(b), it can be confirmed that only the fourth dropper (No. 20) has a significant average dropper axial force from the start of the controlled section to the time when pantograph 3 passes through the controlled section.

[0134] From point E in Figure 12(c), it can be confirmed that the dropper axial force of the span after the controlled section is fluctuating only in the axial force of the first dropper (No. 25) when pantograph 3 is located at the end of the controlled section (mass point number 1349).

[0135] From the above, in order to consider the axial force of one dropper each before and after the controlled section in equation (14), it is preferable that each measurement site of the messenger wire M is located at the position shown in Fig. 6. That is, in the method for measuring the pantograph lift force by the MW method, it is preferable that the measurement points of the inclination of the messenger wire M, which are both ends of the effective measurement section, are located between the first dropper D and the second dropper D on the outer side from both ends of the controlled section.

[0136] [Verification of approximate solution] Next, the validity of the approximate solution for the lift force obtained by the method for measuring the pantograph lift force according to each embodiment will be verified.

[0137] In this verification, the verification is performed using simulation data in which the pantograph 3 runs at 140 to 320 km / h. The aerodynamic lift coefficient CL of the pantograph 3 is set to 0.00035 N / (km / h) under standard conditions. 2 In addition, the lift abnormality of pantograph 3 was simulated, and the lift abnormality was reduced by ±0.00020N / (km / h) from the standard condition. 2 The results of the changes will also be verified.

[0138] Figure 13 shows the measurement results of the lift force of the pantograph under each condition, with (a) being the AxW method, (b) being the MW method, (c) being the MWS method, and (d) being the MWS+ method. These are graphs showing the results of the measurement results arranged as characteristics against speed.

[0139] Figure 14 shows the measurement results of the pantograph lift force under each condition, where (a) is the AxW method, (b) is the MW method, (c) is the MWS method, and (d) is a graph showing a comparison of the measurement results by the MWS+ method with the simulation results, and (e) is a graph showing the calculation results of the root mean square error for each measurement method. In addition, in each of Figures 14(a) to (d), the horizontal axis plots the set value of the lift force in the simulation, and the vertical axis plots the lift force measured by each measurement method. The dashed lines in the figures indicate the area where the measurement results are true values.

[0140] As shown in Figures 14(a) to (d), it can be seen that the measured values ​​obtained by each measurement method tend to be smaller than the true value. This tendency is particularly pronounced with the MWS method, and it can be seen that the measured values ​​tend to be underestimated as the lift increases. One factor behind this is thought to be that the force from pantograph 3 is distributed to other support points, and this tendency is slightly improved with the MWS+ method, which also measures at adjacent support points on both sides. The reason that the root mean square errors for each measurement method differ is because the magnitudes of the terms ignored in the solution approximation process are different.

[0141] Also, as shown in Fig. 14(e), it can be seen that the measurement accuracy of the AxW method and the MW method is high, and the root mean square error value is about 2 to 4 N, which is a high level of measurement accuracy. On the other hand, although the MWS method and the MWS+ method have slightly larger errors, the results in Fig. 14 show that none of the measurement methods showed any variation in the speed characteristics of the lift at a specific speed. Therefore, it can be seen that the method of measuring the pantograph lift according to each embodiment can adequately detect an abnormality in the lift of the pantograph 3 of about 10 N, which corresponds to about 20% of the static lift force of the pantograph 3 of 54 N, even if there is an error from the true value.

[0142] [Pantograph lift abnormality detection system] Next, a pantograph lift abnormality detection system using the pantograph lift measurement method according to each embodiment will be described.

[0143] The pantograph lift abnormality detection system of this embodiment comprises a lift calculation means for calculating the pantograph lift using any of the methods described above, an abnormality determination means for determining whether the pantograph lift calculated by the lift calculation means is within a predetermined range, and an alarm means for issuing an alarm regarding an abnormality detected by the abnormality determination means.

[0144] The lift calculation means includes detection devices such as sensors for detecting the measured values ​​used in each of the above-mentioned measurement methods. Specifically, the lift calculation means includes an axial force detection device for detecting the axial force of the dropper D, a passage detection device for detecting the passage of the pantograph 3 through the controlled section, an inclination detection device for detecting the inclination of the wires of the electric rails 1 and 1', a support force detection device for detecting the support force of the support point 2, and the like.

[0145] The lift calculation means receives signals from each detection device, measures the lift by any one of the lift measurement methods, the AxW method, the MW method, the MWS method, or the MWS+ method, and transmits the measurement value to the abnormality determination means.

[0146] The abnormality determination means includes a storage device that stores a lift threshold value set within a predetermined range for each train speed. The abnormality determination means receives the measured value of the pantograph lift transmitted from the lift calculation means and determines whether the measured value is within a preset lift range. If the abnormality determination means determines that the measured value is outside the preset range, it transmits a signal to the alarm generation means.

[0147] The alarm issuing means receives the signal transmitted from the abnormality determination means and issues an alarm to notify of an abnormality. For example, if the measured value of the pantograph lift force is smaller than a set lower threshold, an alarm is issued to notify of the risk of the pantograph 3 descending, and if it is larger than an upper threshold, an alarm is issued to notify of the risk of damage to the overhead contact line.

[0148] In this way, according to the pantograph lift abnormality detection system of this embodiment, it is possible to determine abnormalities in the pantograph lift measured by each of the measurement methods described above, and to prevent malfunctions in the current collection mechanism caused by changes in the pantograph lift in advance.

[0149] In this embodiment, the control section for tabulating the pantograph lift force has been described as one span between adjacent support points 2, but the scope of the control section is not limited to this and may be a series of multiple spans. It is clear from the claims that such modified or improved embodiments are also included in the technical scope of the present invention. [Explanation of symbols]

[0150] 1, 1' contact line, 2 support point, 3 pantograph, 3a pantograph, 3b lifting mechanism, M catenary wire, D dropper, Ax auxiliary catenary wire, H hanger, Tr contact wire.

Claims

1. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line is a measurement section (x １ <x<x ２ a catenary wire supported by at least two support points within the catenary wire and suspending a plurality of droppers; an auxiliary messenger wire supported by the dropper and suspending a plurality of hangers; A contact wire supported by the hanger, The pantograph contacts the contact wire, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The tension T of the auxiliary catenary Ａｘ and, Dropper axial force d acting on the dropper ｊ (t) (j=1, 2, ..., q), The inclination (∂y Ａｘ / ∂x ｘ＝ｘ１ , ∂y Ａｘ / ∂x ｘ＝ｘ２ )and, The static lifting force p of the pantograph ０ Based on the following formula [0010] A method for measuring pantograph lift, comprising the steps of:

2. The method for measuring pantograph lift according to claim 1, A method for measuring pantograph lift, characterized in that both ends of the measurement section are located between the second outermost hanger and the third outermost hanger from both ends of the control section.

3. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line is a measurement section (x １ <x<x ６ A messenger wire supported by at least two support points within the A contact wire in contact with the pantograph, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The tension T of the messenger wire Ｍ and, The inclination (∂y Ｍ / ∂x ｘ＝ｘ１ , ∂y Ｍ / ∂x ｘ＝ｘ２ , ..., ∂y Ｍ / ∂x ｘ＝ｘ６ )and, The static lifting force p of the pantograph ０ Based on the following formula [0025] A method for measuring pantograph lift, comprising the steps of:

4. The method for measuring pantograph lift according to claim 3, The messenger wire suspends a plurality of droppers, A method for measuring pantograph lift, characterized in that both ends of the measurement section are located between the first outer dropper and the second outer dropper from both ends of the control section.

5. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line is a measurement section (x １ <x<x ４ A messenger wire supported by at least two support points within the A contact wire in contact with the pantograph, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The inclination (∂y Ｍ / ∂x ｘ＝ｘ１ , ∂y Ｍ / ∂x ｘ＝ｘ２ , ..., ∂y Ｍ / ∂x ｘ＝ｘ４ )and, The static lift force p of the pantograph ０ Based on the following formula [0030] A method for measuring pantograph lift, comprising the steps of:

6. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line is a measurement section (x １ <x<x ８ A messenger wire supported by at least four support points within the A contact wire in contact with the pantograph, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The inclination (∂y Ｍ / ∂x ｘ＝ｘ１ , ∂y Ｍ / ∂x ｘ＝ｘ２ , ..., ∂y Ｍ / ∂x ｘ＝ｘ８ )and, The static lifting force p of the pantograph ０ Based on the following formula [0045] A method for measuring pantograph lift, comprising the steps of:

7. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line includes a catenary supported by at least two support points within a measurement section; A contact wire in contact with the pantograph, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The support force (f ｓ１ , f ｓ２ )and, The static lift force p of the pantograph ０ Based on the following formula [0050] A method for measuring pantograph lift, comprising the steps of:

8. A method for measuring a pantograph lift force of a pantograph that slides against an electric rail, comprising the steps of: The overhead contact line is a catenary supported by at least four support points within a measurement section; A contact wire in contact with the pantograph, The time T for the pantograph to pass through a control section set inside the measurement section １ (-T １ / 2<t<T １ / 2) and The support force (f ｓ１ , f ｓ２ , ..., f ｓ４ )and, The static lift force p of the pantograph ０ Based on the following formula [006] A method for measuring pantograph lift, comprising the steps of:

9. A system for detecting an abnormality in a pantograph lift force of a pantograph that slides against an electric train line, comprising: The overhead contact line includes a catenary wire that is supported by at least two support points within a measurement section and suspends a plurality of droppers; an auxiliary messenger wire supported by the dropper and suspending a plurality of hangers; A contact wire supported by the hanger, The pantograph contacts the contact wire, a passage detection device that detects passage of the pantograph through a control section set inside the measurement section; An axial force detection device for detecting an axial force acting on the dropper; a tilt detection device for detecting a tilt of the auxiliary catenary wire at both ends of the measurement section, A lift calculation means for calculating the pantograph lift; an abnormality determination means for determining whether the pantograph lift calculated by the lift calculation means is within a predetermined range; a warning means for warning an abnormality detected by the abnormality determination means.

10. In the pantograph lift abnormality detection system according to claim 9, A pantograph lift abnormality detection system characterized in that both ends of the measurement section are located between the second outermost hanger and the third outermost hanger from both ends of the management section.

11. A system for detecting an abnormality in a pantograph lift force of a pantograph that slides against an electric train line, comprising: The overhead contact line includes a catenary supported by at least two support points within a measurement section; A contact wire in contact with the pantograph, a passage detection device that detects passage of the pantograph through a control section set inside the measurement section; a tilt detection device for detecting a tilt of the catenary at both ends of the measurement section and in the left and right vicinities of all the support points within the measurement section, A lift calculation means for calculating the pantograph lift; an abnormality determination means for determining whether the pantograph lift calculated by the lift calculation means is within a predetermined range; a warning means for warning an abnormality detected by the abnormality determination means.

12. In the pantograph lift abnormality detection system according to claim 11, The messenger wire suspends a plurality of droppers, A pantograph lift abnormality detection system characterized in that both ends of the measurement section are located between the first outer dropper and the second outer dropper from both ends of the management section.

13. A system for detecting an abnormality in a pantograph lift force of a pantograph that slides against an electric train line, comprising: The overhead contact line includes a catenary supported by at least two support points within a measurement section; A contact wire in contact with the pantograph, a passage detection device that detects passage of the pantograph through a control section set inside the measurement section; a tilt detection device for detecting a tilt of the catenary in the left and right vicinity of all the support points in the measurement section, A lift calculation means for calculating the pantograph lift; an abnormality determination means for determining whether the pantograph lift calculated by the lift calculation means is within a predetermined range; a warning means for warning an abnormality detected by the abnormality determination means.

14. In the pantograph lift abnormality detection system according to claim 13, A pantograph lift abnormality detection system, characterized in that the catenary is supported by at least four support points within the measurement section.

15. A system for detecting an abnormality in a pantograph lift force of a pantograph that slides against an electric train line, comprising: The overhead contact line includes a catenary supported by at least two support points within a measurement section; A contact wire in contact with the pantograph, a passage detection device that detects passage of the pantograph through a control section set inside the measurement section; A support force detection device that detects the support forces of all the support points within the measurement section, A lift calculation means for calculating the pantograph lift; an abnormality determination means for determining whether the pantograph lift calculated by the lift calculation means is within a predetermined range; a warning means for warning an abnormality detected by the abnormality determination means.

16. In the pantograph lift abnormality detection system according to claim 15, A pantograph lift abnormality detection system, characterized in that the catenary is supported by at least four support points within the measurement section.

Images