CN107976610B - Calculation method and device for bow net pull-out value - Google Patents
Calculation method and device for bow net pull-out value Download PDFInfo
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- CN107976610B CN107976610B CN201711365348.0A CN201711365348A CN107976610B CN 107976610 B CN107976610 B CN 107976610B CN 201711365348 A CN201711365348 A CN 201711365348A CN 107976610 B CN107976610 B CN 107976610B
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- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a method and a device for calculating a bow net pull-out value, which comprises the steps of acquiring a net wire passing signal by utilizing a preset net wire passing sensor arranged on a pantograph supporting plate; receiving network cable passing signals sent by a front processor which is respectively connected with each network cable passing sensor; and constructing a pull-out curve of the network cable by using the driving mileage or the driving time and the network cable passing signal, and measuring the pull-out value of the network cable according to the pull-out curve. The invention has low cost, high reliability, small calculation amount and is not easy to be interfered by the environment, and can realize the real continuous layout of the online reproduction network cable.
Description
Technical Field
The invention relates to the technical field of bow net fault diagnosis, in particular to a bow net pull-out value calculating method and a bow net pull-out value calculating device.
Background
The pullout value is the distance by which the contact line is offset from the pantograph center (or track center) at the location point, called the pullout value, and also called the zig-zag value in the straight line segment. The pull-out value of the contact line is related to the maximum allowable working range (usually 950mm) of the pantograph of the electric locomotive and also related to the line condition. In the straight line section, the line center line is coincident with the locomotive pantograph center line, the contact lines are arranged along the line center line in a 'symmetrical' manner, namely the so-called straight line section, and the pull-out value of the contact lines is also called 'value', and the standard is +/-300 mm. The electric locomotive body in the curve section inclines to the inner rail along with the outer height of the line, the pantograph is also inclined, the center of the line is not overlapped with the center of the pantograph, the drawing value in the curve section is different along with the different radii of the curve, generally between 150 mm and 400mm, the allowable error is +/-30 mm, the drawing value can be properly increased under the severe environment or special equipment conditions, and the maximum value is not more than one half of the allowable working range (950mm) of the pantograph slide plate.
The network cable pull-out value measuring method in the prior art mainly comprises two main types:
firstly, vision measurement based on high-definition images is generally carried out by utilizing a contour curve generated by a contact part of an intra-ocular bow net shot by a high-definition camera (generally adopting binocular shooting) for image recognition and analysis so as to achieve the detection principle of obtaining geometric parameters of a net wire;
secondly, the measurement is directly carried out by using a measuring tool, and the measurement is generally carried out on-line or off-line by using the measuring tool with a scale;
the two modes are easily interfered by ambient light and foreign matters, have complex structures and high cost, or are not easy to realize the real continuous layout of online reproduction network cables, and can only be used for measuring a pull-out value but cannot assist the positioning and confirmation of the faults of the bow and the network.
Therefore, in order to measure the pull-out value and assist the positioning and confirmation of the bow and net faults, and reduce the cost, improve the reliability and reduce the complexity of information analysis, a bow net pull-out value calculation method and a bow net pull-out value calculation device are needed, which are technical problems to be solved by the technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide a bow net pull-out value calculating method and a bow net pull-out value calculating device, which are low in cost, not easy to be interfered by the environment, high in reliability, capable of realizing the real continuous layout of online reproduction network cables and small in calculation amount.
In order to solve the technical problem, the invention provides a bow net pull-out value calculating method, which comprises the following steps: acquiring a network cable passing signal by utilizing a preset network cable passing sensor arranged on a pantograph supporting plate;
receiving the network cable passing signals sent by a front processor which is respectively connected with each network cable passing sensor;
and constructing a pull-out curve of the network cable by using the driving mileage or the driving time and the network cable passing signal, and determining the pull-out value of the network cable according to the pull-out curve.
Preferably, the preset number is less than or equal to 5, and the two adjacent network cable passing sensors of the middle network cable passing sensor are defined as a left identification network cable passing sensor and a right identification network cable passing sensor respectively;
the process of constructing the pull-out curve of the network cable specifically comprises the following steps:
determining the starting point of a pull-out curve according to the pulse signal output by the sensor when the middle network cable passes through the sensor;
taking the driving mileage or the driving time corresponding to the pulse output by the sensor through which the left identification cable passes and the sensor through which the right identification cable passes as an abscissa, and taking the position of the corresponding cable passing through the sensor as an ordinate to obtain a curve point;
and dividing the abscissa into sections, wherein each section comprises two curve points, connecting the two curve points in each section linearly, extending the straight line of each section, and removing useless curves to obtain a pull-out curve in a broken line form.
Preferably, the process of determining the pull-out value of the mesh wire is specifically as follows:
according to the ordinate LD of the lowest point on the pull-out curve, the left-end pull-out value is calculated as: LZ is 0.5M-LD, and 0.5M is the distance from the edge-most net line to the middle net line through the sensor;
according to the ordinate LG of the highest point on the pull-out curve, the calculation formula of the right-end pull-out value is as follows: LY equals LG-0.5M.
Preferably, the method further comprises the following steps:
acquiring output signals of the vibration impact composite sensors by using the vibration impact composite sensors arranged at two ends of the pantograph;
comparing the output signal of the vibration impact composite sensor with the pull-out curve;
determining corresponding vertical coordinates on the pull-out curve according to the horizontal coordinates of start points and stop points of concave abrasion information in the output signal of the vibration impact composite sensor, and taking the vertical coordinates as start positions and stop positions of a pantograph abrasion section;
and calculating the length of the wear section according to the absolute value of the difference between the start position and the stop position of the wear section of the pantograph.
Preferably, the method further comprises the following steps:
determining the abscissa of the output signal of the vibration and impact composite sensor, wherein the impact pulse continuously occurs for at least 2 times in one period; the period is the time between two continuous pulses output by the sensor when the middle network cable passes through the sensor under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate on the pull-out curve, and taking the vertical coordinate as the hard point fault position of the pantograph.
Preferably, the method further comprises the following steps:
acquiring an output signal of a pantograph-catenary arc discharge and electric energy acquisition sensor by using a pantograph-catenary arc discharge and electric energy acquisition sensor which is connected to a pantograph-catenary arm rod or a current lead in a penetrating manner;
comparing the output signals of the bow net arc-drawing and electric energy acquisition sensors with the drawing curve;
determining the abscissa of the impact pulse which appears for at least 2 times continuously in a period in the output signal of the bow net arc discharge and electric energy acquisition sensor according to the comparison result; the period is the time between two continuous pulses output by the sensor when the middle network cable passes through the sensor under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate on the pull-out curve, and taking the vertical coordinate as the arc-drawing fault position of the pantograph.
Preferably, the method further comprises the following steps:
if the output signals of the bow net arc discharge and electric energy acquisition sensors are detected to contain arc discharge pulses which do not periodically appear in a plurality of periods, and the same arc discharge pulses are detected when a subsequent train or the train passes through the same position again, the fact that the network cable fault exists in the mileage is judged.
Preferably, the method further comprises the following steps:
if the current train speed is greater than a preset speed value, the bow net arc discharge and electric energy acquisition sensors output power grid power failure signals, and each network cable does not output pulse signals in one period after passing through the sensors, the occurrence of a network cable falling fault is diagnosed.
Preferably, the measuring mesh line is in a discontinuous rigid mesh line overlapping layout, and an abscissa of an earlier-appearing pulse and an abscissa of a later-appearing pulse are respectively taken as abscissa points on two overlapped straight lines.
In order to solve the technical problem, the invention also provides a pantograph pull-out value calculation device, which is based on a pantograph fault monitoring device and comprises a preset number of network cable passing sensors and a front processor, wherein the preset number of network cables are arranged on the pantograph supporting plate at intervals, and the front processor is respectively connected with the sensors; the diagnostic device includes:
the receiving module is used for receiving output signals sent by the front-end processor when the network cables pass through the network cables through the sensors;
the pull-out curve drawing module is used for constructing a pull-out curve of the network cable by utilizing the driving mileage or the driving time and the network cable passing signal;
and the pull-out value determining module is used for determining the pull-out value of the network cable according to the pull-out curve.
The invention provides a method and a device for calculating a pull-out value of a pantograph, which are used for acquiring the cable passing information of a pantograph according to a cable passing sensor arranged on the pantograph, then constructing a pull-out curve according to the information and further determining the pull-out value according to the pull-out curve. Compared with a mode of arranging a camera, the mode of arranging the sensor is low in cost, not prone to being interfered by the environment and high in reliability, the signals of the sensor can realize real continuous layout of online reproduction network cables, and compared with image signals, the method is more visual and specific, and compared with a manual direct measurement mode, the method is smaller in data analysis workload and lower in error occurrence possibility.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a flowchart of a process of a bow net pull-out value calculation method according to the present invention;
fig. 2 is a schematic structural diagram of a bow net fault monitoring device provided by the invention;
FIG. 3 is a drawing of a net-wire pull-out curve;
FIG. 4 is a schematic view of a discontinuous rigid mesh overlapping layout and contact with a pantograph;
FIG. 5 is a drawing curve construction diagram in a discontinuous rigid wire mesh;
fig. 6 is a schematic structural diagram of a bow net pull-out value calculating device according to the present invention.
Detailed Description
The core of the invention is to provide a bow net pull-out value calculation method and a device thereof, which have low cost, high reliability, small calculation amount and are not easy to be interfered by the environment, and can realize the real continuous layout of the online reproduction network cable.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The invention provides a bow net pull-out value calculating method, which is shown in figure 1, wherein figure 1 is a flow chart of the process of the bow net pull-out value calculating method provided by the invention; the method comprises the following steps:
step s 1: acquiring a network cable passing signal by using a preset network cable passing sensor 3 arranged on a pantograph supporting plate;
step s 2: receiving network cable passing signals sent by a front processor 4 which is respectively connected with each network cable passing sensor 3;
step s 3: and constructing a pull-out curve of the network cable by using the driving mileage or the driving time and the network cable passing signal, and measuring the pull-out value of the network cable according to the pull-out curve.
The specific process of constructing the pull-out curve comprises the following steps:
taking the driving mileage or driving time corresponding to the pulse in the output signal of the sensor 3 of the rest of the network cables except the two ends of the pantograph supporting plate as the abscissa, and taking the position of the network cable corresponding to the pulse passing through the sensor 3 as the ordinate to obtain a curve point;
by connecting the respective curve points, a pull-out curve of the network cable is obtained.
In a specific embodiment, the preset number is less than or equal to 5, and two adjacent network cable passing sensors 3 of the middle network cable passing sensor 3 are defined as a left identification network cable passing sensor 3 and a right identification network cable passing sensor 3 respectively;
at this time, referring to fig. 3, the process of constructing the pull-out curve specifically includes:
determining the starting point of a pull-out curve according to the pulse signal output by the sensor 3 when the middle network cable passes through the sensor;
taking the driving mileage or the driving time corresponding to the pulse output by the sensor 3 when the left identification cable passes through the sensor 3 and the right identification cable passes through the sensor 3 as an abscissa, and taking the position of the corresponding cable passing through the sensor 3 as an ordinate to obtain a curve point;
and (2) dividing the abscissa into sections, wherein each section comprises two curve points, connecting the two curve points in each section linearly, extending the straight line of each section, removing useless curves to obtain a pull-out curve in a broken line form, and naturally, correcting the curvature of the pull-out curve according to engineering experience or related design indexes.
It can be understood that, taking fig. 2 as an example, the number of the network cables passing through the sensor 3 is 5 (31, 32, 33, 34, 35); in the above embodiment, assuming that the limit range of the cable motion allowed at both ends of the pantograph is 0 to M, the pantograph left end limit position is defined as 0 and the pantograph right end limit position is defined as M [ M ], for example, M is 1M, 5 cables mounted on the pantograph pan are respectively mounted on the left end distance. Of course, the present invention is not limited to specific values of M and X.
According to the position values (L33, L32, L34) of the middle reticle passing sensor 33, the left recognition reticle passing sensor 32, and the right recognition reticle passing sensor 34 as the ordinate Y of the pull-out curve, that is, Y33 ═ L33, Y32 ═ L32, and Y34 ═ L34, the 3 time coordinate points () (L33, T33), (L32, T32), (L32, C32) of the pull-out curve of the reticle are obtained as the abscissa T \ C of the pull-out curve of the reticle, according to the time T (T33, T32, T34) when the middle reticle passing sensor 33, the left recognition reticle passing sensor 32, and the right recognition reticle passing sensor 34 pass the reticle (i.e., sensor output pulse), or as the mileage C (C33, C32, C34) of the pull-out curve of the reticle. According to the principle of 'determining a line by two points' of analytic geometry and the engineering reality premise that a net line is a straight line between two curve points, drawing curves of local net lines at each time interval are made, namely, sections are divided from an initial position, each section comprises two curve points, the two curve points are connected in a straight line manner, the local drawing curves of each section are obtained, and all curves between the intersection points of the local drawing curves of each section are taken as final drawing curves. Referring to fig. 3, fig. 3 is a drawing for constructing a wire drawing curve of fig. 3.
In the above process, it is preferable to use coordinates corresponding to a pulse in which the intermediate mesh passes through the sensor 33 as the start position.
It can be further seen that the procedure for determining the pullout value is specifically:
according to the ordinate LD of the lowest point on the pull-out curve, the left-end pull-out value is calculated as: LZ is 0.5M-LD, 0.5M is the distance from the edge-most screen line passing sensor 3 to the middle screen line passing sensor 3;
according to the ordinate LG of the highest point on the pull-out curve, the calculation formula of the right-end pull-out value is as follows: LY equals LG-0.5M.
The invention provides a pantograph-catenary pull-out value calculation method, which is characterized in that the catenary passing information of a pantograph is obtained according to a catenary passing sensor arranged on the pantograph, then a pull-out curve is constructed according to the information, and the pull-out value can be determined according to the pull-out curve. Compared with a mode of arranging a camera, the mode of arranging the sensor is low in cost, not prone to being interfered by the environment and high in reliability, the signals of the sensor can realize real continuous layout of online reproduction network cables, and compared with image signals, the method is more visual and specific, and compared with a manual direct measurement mode, the method is smaller in data analysis workload and lower in error occurrence possibility.
Example two
The invention also comprises the step of comparing the output signals of the pantograph-catenary arc-discharge and electric energy acquisition sensors 2 and the pull-out curves according to the vibration impact composite sensors 1 arranged at the two ends of the pantograph and/or the pantograph-catenary arc-discharge and electric energy acquisition sensors penetrating through the pantograph arm rods or the current leads so as to determine the position and the type of the pantograph-catenary fault.
In a specific embodiment, the method further comprises:
acquiring output signals of the compound sensor 1 by using vibration impact at two ends of a pantograph;
comparing the output signal of the vibration impact composite sensor 1 with a pull-out curve;
determining corresponding vertical coordinates on a pull-out curve according to the horizontal coordinates of start and stop points of concave abrasion information in an output signal of the vibration impact composite sensor 1, and taking the vertical coordinates as start and stop positions of a wear section of the pantograph;
and calculating the length of the wear section according to the absolute value of the difference between the start position and the stop position of the wear section of the pantograph.
In a specific embodiment, the method further comprises:
determining the abscissa of the output signal of the vibration and impact composite sensor 1, in which impact pulses occur at least 2 times in a cycle; the period is the time between two consecutive pulses output by the sensor 3 when the middle network cable passes through under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate on the pull-out curve, and taking the vertical coordinate as the hard point fault position of the pantograph.
In a specific embodiment, the method further comprises:
acquiring an output signal of a sensor 2 by utilizing a pantograph net arc-drawing and electric energy acquisition sensor which is connected on a pantograph arm rod or a current lead in a penetrating way;
comparing the output signal of the bow net arc drawing and electric energy acquisition sensor 2 with a drawing curve;
determining the abscissa of the impact pulse which appears for at least 2 times continuously in one period in the output signal of the bow net arc discharge and electric energy acquisition sensor 2 according to the comparison result; the period is the time between two consecutive pulses output by the sensor 3 when the middle network cable passes through under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate on the pull-out curve, and taking the vertical coordinate as the arc-out fault position of the pantograph.
Further, the method further comprises:
if the output signals of the bow net arc discharge and electric energy acquisition sensor 2 are detected to contain arc discharge pulses which do not periodically appear in a plurality of periods, and the same arc discharge pulses are detected when the subsequent train or the train passes through the same position again, the fact that the network cable fault exists in the mileage is judged.
Further, if the current train speed is greater than the preset speed value, the bow net arc discharge and electric energy acquisition sensor 2 outputs a power grid power-off signal, and each network cable does not output a pulse signal in one period after passing through the sensor 3, the occurrence of a network cable falling fault is diagnosed.
The preset speed value may be 5km/h, but the present invention is not limited thereto.
In one embodiment, if the network cable is a rigid network cable (e.g. in a subway tunnel), because the rigid network cable can not use a contact line as long as several kilometers as the flexible network cable of a railway, but only can use a rigid bus network cable each section of which can only be several tens of meters long, a plurality of bus network cables overlapping with each other between two adjacent pull-out points may be required to form the rigid network cable overlapping, as shown in fig. 4, fig. 4 is a schematic diagram of a discontinuous rigid network cable overlapping layout and a pantograph contact. Thus the 5 wires passing sensor mounted under the pantograph when passing the overlapping wires, the situation shown in figure 4, the middle wire passing sensor 33 will receive two consecutive pulses instead of one. In order to construct the pull-out curve of the net wire, a method of construction needs to be solved. As shown in fig. 5, fig. 5 is a graph of pull-out curve construction in a discontinuous rigid wire mesh.
That is, when the mesh is preferably measured to be a discontinuous rigid mesh lapping layout, the abscissa of the pulse appearing first and the abscissa of the pulse appearing later are taken as the abscissa points on the two straight lines to be lapped, respectively.
In another embodiment, the actual driving speed is varied. This means that the mileage value per unit time is changed accordingly. Thus, when a uniformly plotted time is described as an abscissa, pull-out curves distributed at equal intervals in time will become curved lines, resulting in the construction of a reticle pull-out curve that cannot be realized using the principle of "two points determine one line". If the mileage is used as the abscissa, the pull-out curves distributed at equal intervals according to the mileage will still be straight lines (broken lines), and then the construction of the net line pull-out curves can still be realized by using the principle of "determining one line from two points". Therefore, only the mileage can be used as the abscissa and the time cannot be used as the abscissa in this case.
Further, the vehicle speed tracking generation method when constructing the network cable pull-out curve by using the mileage abscissa comprises the following steps:
1) sampling all the detection data by using a vehicle speed tracking sampling method;
2) the vehicle speed tracking sampling method comprises the following steps: setting the diameter of wheel as D [ m ], speed as V [ m/s ], rotating speed frequency FN of wheel as V/D, FN dimension as Hz, i.e. [1/s ]; multiplying the frequency of FN to obtain FC ═ K × FN, and the mileage increment between every 2 FC pulses is DL ═ π D/K; for example: setting the wheel diameter D to be 1m and the frequency multiplication coefficient K to be 200, and setting the mileage increment DL to pi to D/K to 15.708 mm; for example, if the frequency FZ of the rotation speed signal from the rotation speed sensor mounted on the wheel is 100 × FN and the required multiplication factor K is 200, the multiplication factor of the additional multiplier is:
K1＝FC/FZ＝K*FN/FZ＝200*FN/(100*FN)＝2。
3) arranging all the detection data of the vehicle speed tracking sampling according to the sequence of sampling point numbers to obtain a mileage abscissa sample; the drawing curve of the wire is constructed by using the pulse abscissa of the wire on the mileage abscissa sample passing through the sensors 31, 32, 33, 34, 35 and the corresponding installation position data L31, L32, L33, L34, L35 on the pantograph to determine the key point coordinates of the drawing curve of the wire, for example, the specific process may be as follows: the method for determining the coordinate point by the abscissa and the L34 ordinate of the pulse when the right identification reticle passes through the sensor 34, because the middle reticle will receive two continuous pulses instead of one pulse through the sensor 33, the coordinate point is determined by the abscissa and the L33 ordinate of the pulse which appear first when the middle reticle passes through the sensor 33, a direct segment is drawn according to the two points, then the coordinate point is determined by the abscissa and the L33 ordinate of the pulse which appear after the middle reticle passes through the sensor 33, the coordinate point is determined by the abscissa and the L32 ordinate of the pulse which appear when the left identification reticle passes through the sensor 32, a direct segment is drawn according to the two points, and the method for determining the curve lap point is as follows: the midpoint of the abscissa of the two pulses of the sensor in which two pulses occur in succession is taken as the abscissa of the overlap point of the pull-out curve.
In the above embodiment, the network cable passing information, the vibration impact information, the arcing and power information, and the like of the pantograph are acquired by the various sensors provided on the pantograph, and then the pull-out curve is constructed based on the above information, so that the pull-out value can be determined based on the pull-out curve, and the failure position of the pantograph can be analyzed. Compared with a mode of arranging a camera, the mode of arranging the sensor is low in cost, not prone to being interfered by the environment and high in reliability, the signals of the sensor can realize real continuous layout of online reproduction network cables, and compared with image signals, the method is more visual and specific, and compared with a manual direct measurement mode, the method is smaller in data analysis workload and lower in error occurrence possibility.
The invention also provides a bow net pull-out value calculation device, which is based on the bow net fault monitoring device and comprises a preset number of net wires which are arranged on a pantograph supporting plate at intervals and pass through sensors 3 and a pre-processor 4 which is respectively connected with the sensors; referring to fig. 6, fig. 6 is a schematic structural view of a bow net pull-out value calculating device according to the present invention. The diagnostic device includes:
the receiving module 51 is used for receiving output signals sent by the front-end processor 4 when each network cable passes through the network cable by the sensor 3;
the pull-out curve drawing module 52 is used for constructing a pull-out curve of the network cable by using the driving mileage or the driving time and the network cable passing signal;
and the pull-out value determining module 53 is used for determining the pull-out value of the net cable according to the pull-out curve.
The invention provides a pantograph-catenary pull-out value calculation device, which acquires catenary passing information of a pantograph according to various sensors arranged on the pantograph, and then constructs a pull-out curve according to the information, so that a pull-out value can be determined according to the pull-out curve. Compared with a mode of arranging a camera, the mode of arranging the sensor is low in cost, not prone to being interfered by the environment and high in reliability, the signals of the sensor can realize real continuous layout of online reproduction network cables, and compared with image signals, the method is more visual and specific, and compared with a manual direct measurement mode, the method is smaller in data analysis workload and lower in error occurrence possibility.
The above embodiments are only preferred embodiments of the present invention, and the above embodiments can be combined arbitrarily, and the combined embodiments are also within the scope of the present invention. It should be noted that other modifications and variations that may suggest themselves to persons skilled in the art without departing from the spirit and scope of the invention are intended to be included within the scope of the invention as defined by the appended claims.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A bow net pull-out value calculation method, comprising:
acquiring a network cable passing signal by utilizing a preset number of network cables arranged on a pantograph supporting plate to pass through a sensor; the size of the preset number is less than or equal to 5; defining two adjacent network cable passing sensors of the middle network cable passing sensor as a left identification network cable passing sensor and a right identification network cable passing sensor respectively;
receiving the network cable passing signals sent by a front processor which is respectively connected with each network cable passing sensor;
constructing a pull-out curve of the network cable by using the driving mileage or the driving time and the network cable passing signal, and determining a pull-out value of the network cable according to the pull-out curve;
the process of constructing the pull-out curve of the network cable specifically comprises the following steps:
determining the starting point of a pull-out curve according to the pulse signal output by the sensor when the middle network cable passes through the sensor;
taking the driving mileage or the driving time corresponding to the pulse output by the sensor through which the left identification cable passes and the sensor through which the right identification cable passes as an abscissa, and taking the position of the corresponding cable passing through the sensor as an ordinate to obtain a curve point;
and dividing the abscissa into sections, wherein each section comprises two curve points, connecting the two curve points in each section linearly, extending the straight line of each section, and removing useless curves to obtain a pull-out curve in a broken line form.
2. The method according to claim 1, characterized in that the process of determining the pull-out value of the net string is embodied as:
according to the ordinate LD of the lowest point on the pull-out curve, the left-end pull-out value is calculated as: LZ is 0.5M-LD, and 0.5M is the distance from the edge-most net line to the middle net line through the sensor;
according to the ordinate LG of the highest point on the pull-out curve, the calculation formula of the right-end pull-out value is as follows: LY equals LG-0.5M.
3. The method of claim 1, further comprising:
acquiring output signals of the vibration impact composite sensors by using the vibration impact composite sensors arranged at two ends of the pantograph;
comparing the output signal of the vibration impact composite sensor with the pull-out curve;
determining corresponding vertical coordinates on the pull-out curve according to the horizontal coordinates of start points and stop points of concave abrasion information in the output signal of the vibration impact composite sensor, and taking the vertical coordinates as start positions and stop positions of a pantograph abrasion section;
and calculating the length of the wear section according to the absolute value of the difference between the start position and the stop position of the wear section of the pantograph.
4. The method of claim 1, further comprising:
determining the abscissa of the output signal of the vibration impact composite sensor installed at two ends of the pantograph, wherein the impact pulse continuously occurs for at least 2 times in one period; the period is the time between two continuous pulses output by the sensor when the middle network cable passes through the sensor under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate of the drawing curve, wherein the horizontal coordinate of the drawing curve continuously appears for at least 2 times in one period, and taking the vertical coordinate as the hard point fault position of the pantograph.
5. The method of claim 1, further comprising:
acquiring an output signal of a pantograph-catenary arc discharge and electric energy acquisition sensor by using a pantograph-catenary arc discharge and electric energy acquisition sensor which is connected to a pantograph-catenary arm rod or a current lead in a penetrating manner;
comparing the output signals of the bow net arc-drawing and electric energy acquisition sensors with the drawing curve;
determining the abscissa of the impact pulse which appears for at least 2 times continuously in a period in the output signal of the bow net arc discharge and electric energy acquisition sensor according to the comparison result; the period is the time between two continuous pulses output by the sensor when the middle network cable passes through the sensor under the non-fault condition;
and determining a vertical coordinate corresponding to the horizontal coordinate of the impact pulse which appears for at least 2 times continuously in one period on the pull-out curve, and taking the vertical coordinate as the arc-drawing fault position of the pantograph.
6. The method of claim 5, further comprising:
if the output signals of the bow net arc discharge and electric energy acquisition sensors are detected to contain arc discharge pulses which do not periodically appear in a plurality of periods, and the same arc discharge pulses are detected when a subsequent train or the train passes through the same position again, the fact that the network cable fault exists in the mileage is judged.
7. The method of claim 5, further comprising:
if the current train speed is greater than a preset speed value, the bow net arc discharge and electric energy acquisition sensors output power grid power failure signals, and each network cable does not output pulse signals in one period after passing through the sensors, the occurrence of a network cable falling fault is diagnosed.
8. The method of claim 1, wherein the web is a discontinuous rigid web lap layout, and the abscissa of the first occurring pulse and the abscissa of the second occurring pulse are taken as the abscissa points on the two straight lines of the lap.
9. The pantograph-catenary pull-out value calculation device is characterized by being based on a pantograph-catenary fault monitoring device, wherein the pantograph-catenary fault monitoring device comprises a preset number of network cables which are arranged on a pantograph supporting plate at intervals and pass through sensors and a front processor which is connected with the sensors respectively; the size of the preset number is less than or equal to 5; defining two adjacent network cable passing sensors of the middle network cable passing sensor as a left identification network cable passing sensor and a right identification network cable passing sensor respectively; the bow net pull-out value calculation means includes:
the receiving module is used for receiving output signals sent by the front-end processor when the network cables pass through the network cables through the sensors;
the pull-out curve drawing module is used for constructing a pull-out curve of the network cable by utilizing the driving mileage or the driving time and the output signal;
the pull-out value determining module is used for determining the pull-out value of the network cable according to the pull-out curve;
the process of constructing the pull-out curve of the network cable specifically comprises the following steps:
determining the starting point of a pull-out curve according to the pulse signal output by the sensor when the middle network cable passes through the sensor;
taking the driving mileage or the driving time corresponding to the pulse output by the sensor through which the left identification cable passes and the sensor through which the right identification cable passes as an abscissa, and taking the position of the corresponding cable passing through the sensor as an ordinate to obtain a curve point;
and dividing the abscissa into sections, wherein each section comprises two curve points, connecting the two curve points in each section linearly, extending the straight line of each section, and removing useless curves to obtain a pull-out curve in a broken line form.
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| CN118245862B (en) * | 2024-02-27 | 2024-08-23 | 浙江省轨道交通运营管理集团有限公司 | Method for identifying contact net geometric parameters based on pantograph dynamics response |
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| CN104156588A (en) * | 2014-08-05 | 2014-11-19 | 中铁电气化勘测设计研究院有限公司 | Method for calculating wear shape of slide plate corresponding to rigid catenary design model |
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| CN1758029A (en) * | 2004-10-10 | 2006-04-12 | 中南大学 | Method of detecting pantograph net failure danger |
| CN105539512A (en) * | 2015-12-31 | 2016-05-04 | 天津市北海通信技术有限公司 | Pantograph monitoring system |
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