Device for measuring contact pressure of rigid contact network

Abstract

The invention provides a device for measuring the contact pressure of a rigid contact network. The device comprises a first connecting piece, a second connecting piece, a third connecting piece and a sensor assembly, a first end portion of the first connecting piece is provided with a first positioning hole and used for being detachably connected with a pantograph head through the first positioning hole, and a second end portion of the first connecting piece is used for being connected with the sensor assembly; the second connecting piece comprises a first connecting platform and a second connecting platform which are connected through a connecting plate, a second positioning hole is formed in the first connecting platform, and the first connecting platform is detachably connected with the pantograph support through the second positioning hole; the second connecting platform is used for connecting a third connecting piece, and the third connecting piece is used for connecting a sensor assembly. Therefore, under the condition that the height of the carbon sliding block is not affected, the contact pressure of the contact net can be collected.

Description

Technical Field

[0001] This application relates to the field of overhead contact line contact pressure detection technology, specifically to a device for measuring the contact pressure of rigid overhead contact lines. Background Technology

[0002] The pantograph is a crucial component of rail transit vehicles. All the power supply for electric trains comes from the overhead contact line, which transmits electricity through the pantograph. Good pantograph-catenary performance is one of the essential guarantees for fast, safe, and efficient railway operation. The contact pressure between the overhead contact line and the pantograph is a vital technical parameter, directly reflecting their working condition and a key factor affecting contact resistance.

[0003] With the ongoing construction and development of urban railways, the dynamic contact force between the pantograph and the overhead contact line has gradually become a key factor restricting the reliability of the pantograph-catenary relationship. Considering power supply reliability and the service life of the pantograph equipment, accurately detecting the dynamic and static pressure of the pantograph-catenary contact through relevant sensors and measuring fixtures is very meaningful for evaluating the pantograph-catenary interaction. Using pressure sensors to collect pressure data can reflect the dynamic interaction between the pantograph and the overhead contact line in real time during vehicle operation. However, currently, the sensors are all installed between the carbon sliding plate and the pantograph head, which may cause the carbon sliding plate height to exceed the limit, making it impossible for the carbon sliding plate to maintain a horizontal position when raised, which is detrimental to driving safety. Summary of the Invention

[0004] This application addresses the aforementioned technical problems in the existing technology. The purpose of this application is to provide a device for measuring the contact pressure of a rigid overhead contact line, which allows the sensor to be installed on the side of the pantograph without altering the original height dimensions of the carbon sliding plate, ensuring the carbon sliding plate is raised horizontally, eliminating potential safety hazards for trains, and accurately measuring the contact pressure of the overhead contact line.

[0005] According to a first aspect of this application, a device for measuring the contact pressure of a rigid contact wire is provided, the device comprising: a first connector, a second connector, a third connector, and a sensor assembly, wherein, The first end of the first connector is provided with a first positioning hole for detachable connection with the pantograph head through the first positioning hole, and the second end of the first connector is used to connect the sensor assembly. The second connector includes a first connecting platform and a second connecting platform connected via a connecting plate. The first connecting platform is provided with a second positioning hole for detachably connecting the first connecting platform to the pantograph bracket through the second positioning hole. The second connection platform is used to connect to the third connector, and the third connector is used to connect to the sensor assembly.

[0006] The first and second connectors are connected to the pantograph and pantograph bracket through positioning holes. The third connector connects the sensor assembly to the second connection platform. The overall installation structure is adapted to the original pantograph space structure, does not change the original height and dimensions of the carbon sliding plate, avoids abnormal horizontal lifting of the carbon sliding plate, and eliminates driving safety hazards.

[0007] In some embodiments, the number of the first connectors is two, and the two first connectors are respectively disposed on both sides of the second connector to adapt to the pantograph support structure.

[0008] In some embodiments, the first connector is a U-shaped structure, with a first end located on the horizontal structure of the U-shaped structure and a second end located on the vertical structure of the U-shaped structure.

[0009] The horizontal and vertical structures of the U-shaped structure form an angled installation reference, which can accurately match the installation space on the side of the pantograph head, avoid occupying the carbon sliding plate lifting area, ensure that the height of the carbon sliding plate does not exceed the limit and is raised horizontally, and eliminate driving safety hazards.

[0010] In some embodiments, two protrusions are provided on the first end, and the two protrusions are disposed opposite each other on both sides of the horizontal structure. A first positioning hole is provided on the protrusion, and the position of the first positioning hole corresponds to the position of the through hole on the pantograph head.

[0011] The U-shaped horizontal structure has protrusions on both sides that are positioned opposite each other. These, along with the first positioning hole that precisely corresponds to the through hole in the pantograph head, help to prevent the first connector from shifting or twisting during installation, thus improving the accuracy of installation control.

[0012] In some embodiments, the second connector includes a first connecting platform and two second connecting platforms, wherein the two second connecting platforms are symmetrically arranged on both sides of the first connecting platform via connecting plates, and the plane of the second connecting platform is located below the plane of the first connecting platform.

[0013] Two second connection platforms are symmetrically arranged on both sides of the first connection platform. There is no need to raise the installation height. They can strictly match the original distance between the pantograph and the carbon plate, ensuring that the height of the carbon plate does not exceed the limit and that the horizontal lifting is not affected.

[0014] The symmetrically distributed second connecting platform ensures symmetrical stress distribution on the sensor assembly and the third connecting member, avoiding localized stress concentration. Furthermore, it enhances the overall rigidity of the second connecting member, resisting high-frequency vibrations during vehicle operation, preventing component deformation or loosening, and extending the device's service life.

[0015] In some embodiments, the position of the second positioning hole provided on the first connecting platform corresponds to the position of the through hole on the pantograph bracket.

[0016] In some embodiments, a reinforcing structure is provided in the connection area between the first connection platform and the second connection platform to stabilize the connection between the second connector and the pantograph bracket and prevent the components from becoming loose during vehicle operation.

[0017] In some embodiments, the sensor assembly includes a force-bearing structure and a sensor, a third end of the force-bearing structure being connected to a second end of the first connector, and a fourth end of the force-bearing structure being connected to the sensor. The force-bearing structure is used to bear the contact pressure of the rigid structural mesh and transmit the contact pressure to the sensor.

[0018] The load-bearing structure, as the component that bears and transmits contact pressure, does not require alteration of the installation references of the sensor assembly, carbon slide plate, and pantograph. The load-bearing structure undertakes the main pressure transmission, reducing the direct impact and vibration experienced by the sensor assembly, preventing damage to the core components of the sensor assembly, and extending the sensor's lifespan. Furthermore, this load-bearing structure enhances the overall device's resistance to vibration and deformation.

[0019] In some embodiments, one end of the third connector is connected to the sensor assembly, and the other end is provided with a third positioning hole, through which the sensor assembly is fixed on the second connection platform.

[0020] The third connector is fixed to the second connecting platform through the third positioning hole without increasing the installation thickness, and matches the original spacing between the pantograph and the carbon plate.

[0021] In some embodiments, two sets of sensor components are provided on each of the second connection platforms, and the two sets of sensor components provided on the same second connection platform are symmetrically distributed on both sides of the second connection platform.

[0022] Two sets of sensor components are symmetrically distributed on both sides of the same second connecting platform. With the layout of the second connecting platforms on both sides, a balanced arrangement of four sets of sensor components can be achieved, which can comprehensively capture the contact pressure at different positions of the carbon slide plate, avoid the limitations of single-point measurement, and ensure the authenticity and reliability of the data.

[0023] Compared with the prior art, the beneficial effects of the embodiments of this application are as follows: This application provides a device for measuring the contact pressure of a rigid contact network. The first connector is precisely aligned with the pantograph head through a first positioning hole. The first connecting platform of the second connector is adapted to and fixed to the pantograph bracket. The third connector connects the second connecting platform and the sensor assembly. This allows the measuring device to be installed based on the original pantograph device structure without adding extra installation thickness, without changing the original distance between the carbon sliding plate and the pantograph, and without increasing the height of the carbon sliding plate. This fundamentally avoids the problems of the carbon sliding plate exceeding the height limit and abnormal horizontal lifting.

[0024] The above description is merely an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above description and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0025] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. Similar reference numerals with different letter suffixes may indicate different examples of similar components. The drawings generally illustrate various embodiments by way of example rather than limitation, and are used together with the specification and claims to illustrate the disclosed embodiments. Such embodiments are illustrative and exemplary, and are not intended to be exhaustive or exclusive embodiments of the method, apparatus, system, or non-transitory computer-readable medium having instructions for implementing the method.

[0026] Figure 1 A schematic diagram of an apparatus for measuring the contact pressure of a rigid contact wire according to an embodiment of this application is shown.

[0027] Figure 2 A schematic diagram showing the positional relationship between the sensor assembly, the force-bearing structure, and the third connector according to an embodiment of this application is provided.

[0028] Figure 3 A diagram showing the positional relationship between the device for measuring the contact pressure of a rigid overhead contact line and the pantograph, according to an embodiment of this application, is provided. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this application, the application will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific examples, but these are not intended to limit the scope of this application.

[0030] The terms "first," "second," and similar words used in this application do not indicate any order, quantity, or importance, but are merely used for distinction. The terms "including" or "comprising," etc., used in this application mean that the element preceding the word encompasses the elements listed after the word, and do not exclude the possibility of encompassing other elements. In this application, the arrows shown in the figures for each step are merely examples of the execution order, not limitations. The technical solution of this application is not limited to the execution order described in the embodiments. The steps in the execution order can be combined, broken down, or rearranged, as long as the logical relationship of the executed content is not affected.

[0031] All terms used in this application (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein. Technologies and equipment known to one of ordinary skill in the art may not be discussed in detail, but where appropriate, such technologies and equipment should be considered part of the specification.

[0032] Figure 1 A schematic diagram of an apparatus for measuring the contact pressure of a rigid contact wire according to an embodiment of this application is shown. The apparatus includes a first connector 101, a second connector 102, a third connector 103, and a sensor assembly 104. Specifically, in conjunction with... Figures 1-3 The device will be described in detail.

[0033] The first end of the first connector 101 is provided with a first positioning hole 1061 for detachable connection with the pantograph head 301 through the first positioning hole 1061, and the second end of the first connector 101 is used to connect the sensor assembly 104.

[0034] The first end and the second end are respectively disposed at both ends of the first connector 101. The end is not limited to the endpoint position, but includes the neighborhood area of ​​the endpoint. The first end and the second end are only used to distinguish the position and can be interchanged.

[0035] The first end of the first connector 101 is provided with a first positioning hole 1061. The diameter of the first positioning hole 1061, the location of the first positioning hole 1061 and the number of the first positioning holes 1061 can be determined based on the positioning device provided on the pantograph head 301.

[0036] For example, the positioning device provided on the pantograph head 301 can be through holes distributed on the pantograph head 301, and the position of the first positioning hole 1061 corresponds to the position of each through hole. The first connector 101 and the pantograph head 301 can be detachably connected by bolts and nuts adapted to the first positioning hole 1061, which is convenient for disassembly and assembly and has high connection strength.

[0037] For example, the first positioning hole 1061 can also be a threaded hole, which can be directly screwed into the threaded hole for detachable fixed connection, reducing the space occupied by the nut.

[0038] Alternatively, the first positioning hole 1061 can also be a guide hole with a chamfer or taper. The positioning device on the pantograph head 301 can also be a pin or other snap-fit ​​structure, so that the positioning device can be quickly inserted into the guide hole for quick alignment and fixation, resulting in higher installation efficiency.

[0039] This is merely an illustrative example, and no specific limitations are made regarding the specific structure of the first positioning hole 1061 or the method of detachably connecting it to the pantograph head 301 via the first positioning hole 1061.

[0040] The second connector 102 includes a first connecting platform 1021 and a second connecting platform 1022 connected via a connecting plate. The first connecting platform 1021 is provided with a second positioning hole 1062 for detachably connecting the first connecting platform 1021 to the pantograph bracket 302 through the second positioning hole 1062.

[0041] The pantograph bracket 302 is the load-bearing component of the pantograph, such as... Figure 3 As shown, the two ends of the pantograph bracket 302 are used to connect to the pantograph head 301. The pantograph bracket 302 is generally made of high-strength metal, such as aluminum alloy, stainless steel, or high-strength steel. The connection between the pantograph bracket 302 and the pantograph head 301 can be a fixed connection by welding or a detachable connection by bolts; there is no limitation on this.

[0042] The second connector 102 is located between the pantograph heads 301 and is mainly used to fix the device on the pantograph bracket 302.

[0043] The first connecting platform 1021 can be a flat metal surface, the dimensions of which can be adapted to the dimensions of the mounting surface of the pantograph bracket 302. For example, the width of the first connecting platform 1021 is the same as the width of the pantograph bracket 302, and the length of the first connecting platform 1021 can be the same as or shorter than the length of the pantograph bracket 302, without limitation, as long as the first connecting platform 1021 can stably fit against the pantograph bracket 302.

[0044] In some embodiments, the position of the second positioning hole 1062 provided on the first connecting platform 1021 corresponds to the position of the through hole on the pantograph bracket 302. That is, by providing through hole structures at multiple preset positions on the pantograph bracket 302, the second positioning hole 1062 is provided at the positions corresponding to the multiple preset positions on the first connecting platform 1021 after the first connecting platform 1021 and the pantograph bracket 302 are fixedly attached, so as to facilitate the detachable fixed connection of the first connecting platform 1021 and the pantograph bracket 302 by bolts, snap-fit ​​structures or other fixing devices.

[0045] In some embodiments, there are two first connectors 101, and the two first connectors 101 are respectively disposed on both sides of the second connector 102.

[0046] Specifically, each of the two pantograph heads 301 is provided with a first connector 101. Since the pantograph bracket 302 is located between the two pantograph heads 301, the second connector 102 is located between the two first connectors 101. Through the cooperation of the first connector 101 and the second connector 102, the entire device can be stably fixed on the pantograph bracket 302.

[0047] In some embodiments, the first connector 101 is a U-shaped structure, with the first end located on the horizontal structure of the U-shaped structure and the second end located on the vertical structure of the U-shaped structure.

[0048] Specifically, the opening of the U-shaped structure faces the ground, the horizontal structure of the U-shaped structure serves as the fixed end connected to the pantograph head 301, and the vertical structure of the U-shaped structure serves as the transmission end connected to the sensor assembly 104.

[0049] The horizontal structure of the U-shaped structure fits the side of the pantograph head 301, while the vertical structure is perpendicular to the pantograph head 301. This design does not occupy the original distance between the carbon sliding plate 303 and the pantograph head 301, and it also reserves space for the installation of the sensor assembly 104, ensuring that the height of the carbon sliding plate 303 remains unchanged.

[0050] In some embodiments, two protrusions are provided on the first end, and the two protrusions are arranged opposite each other on both sides of the horizontal structure. A first positioning hole 1061 is provided on the protrusion, and the position of the first positioning hole 1061 corresponds to the position of the through hole on the pantograph head 301.

[0051] The size of the protrusion is not limited, as long as the first positioning hole 1061 can be provided on the protrusion. In a preferred embodiment, the height of the protrusion is the same as the height of the pantograph head 301, so that the pantograph head 301 can be placed exactly between the two protrusions without any height difference, thereby improving the compatibility of the device with the original pantograph and carbon slide plate 303 spatial structure.

[0052] Specifically, a small protrusion extends outward from the horizontal structure of the U-shaped structure. This protrusion can be a metal plate, and the two protrusions are symmetrically distributed and have the same size.

[0053] Each protrusion is provided with at least two first positioning holes 1061. The diameter and position of the first positioning holes 1061 correspond completely to the through holes provided on the pantograph head 301. For example, if the through holes provided on the pantograph head 301 are M8 threaded holes with a hole spacing of 50mm, then the first positioning holes 1061 on the protrusions are also spaced 50mm apart.

[0054] In some embodiments, a clamping positioning is formed between the two protrusions, conforming to the sides of the double-sided support of the pantograph head 301, which facilitates clamping the pantograph head 301. Exemplarily, the pantograph head 301 is placed between the two protrusions and clamped, with the first positioning hole 1061 on the protrusion aligned with the through hole on the pantograph head 301. Bolts can then be inserted for tightening and nuts for positioning, limiting the lateral displacement and torsion of the first connector 101 and ensuring a stable connection with the pantograph. By setting protrusions to clamp the pantograph head 301, the original space between the carbon slide plate 303 and the pantograph is not occupied, and the installation height is strictly controlled.

[0055] In some embodiments, the second connector 102 includes a first connecting platform 1021 and two second connecting platforms 1022, wherein the two second connecting platforms 1022 are symmetrically arranged on both sides of the first connecting platform 1021 by connecting plates, and the plane of the second connecting platform 1022 is located below the plane of the first connecting platform 1021.

[0056] Specifically, the two second connecting platforms 1022 are symmetrically distributed on the left and right sides with the central axis of the first connecting platform 1021 as the reference. The distance between the two second connecting platforms 1022 is adapted to the width of the pantograph bracket 302, so that the pantograph bracket 302 can be surrounded by the second connecting member 102.

[0057] In a preferred embodiment, the plane of the first connecting platform 1021 is higher than the plane of the two second connecting platforms 1022, presenting a stepped structure.

[0058] The first connecting platform 1021 and the second connecting platform 1022 have a stepped layout structure, which does not increase the overall installation thickness. After the first connecting platform 1021 is fixedly connected to the pantograph bracket 302, the second connecting platform 1022 connects to the sensor assembly 104 through the third connector 103, without changing the original distance between the carbon sliding plate 303 and the pantograph, ensuring that the height of the carbon sliding plate 303 does not exceed the limit.

[0059] Two second connecting platforms 1022 are symmetrically arranged on both sides of the first connecting platform 1021 via connecting plates. This symmetrical layout allows the contact pressure to be evenly transmitted to the connecting plate and the first connecting platform 1021 through the two second connecting platforms 1022, and then distributed to the pantograph bracket 302, avoiding local stress concentration. The layered structure strengthens the overall rigidity and can resist high-frequency vibration of the vehicle.

[0060] A connecting plate connects the first connecting platform 1021 and the second connecting platform 1022 to ensure continuous force transmission between the two platforms without stress concentration.

[0061] For example, the connecting plate can be two vertical straight plates with both sides, and the two rectangular straight plates are perpendicular to the first connecting platform 1021 and the second connecting platform 1022. For example, the first connecting platform 1021 can be set to be 100mm long, the two second connecting platforms 1022 can be spaced 80mm apart, and the connecting plate size can be 50mm (height) × 40mm (width).

[0062] In some embodiments, an enhancement structure 105 is provided in the connection area between the first connection platform 1021 and the second connection platform 1022.

[0063] The first connecting platform 1021 and the second connecting platform 1022 are connected by a connecting plate. The connecting area is a key node for force transmission. By setting a reinforcing structure 105, deformation and cracking caused by high-frequency vibration during vehicle operation can be avoided, ensuring structural stability.

[0064] The reinforcing structure 105 can be a rib, for example, a triangular or trapezoidal metal rib is welded at the angle between the connecting plate and the two platforms. The material of the rib can be the same as that of the platform to form a triangular stable structure and disperse stress concentration. For example, the rib thickness is 5-8mm, the length of the right angle side is 20-30mm, and it is fully welded to the platform and the connecting plate.

[0065] Alternatively, the reinforcing structure 105 may be a reinforcing rib, such as welding longitudinal or transverse ribs to the surface of the connecting plate to enhance the rigidity of the plate, prevent the connecting plate from bending, and at the same time not significantly increase the weight.

[0066] Of course, the reinforcing structure 105 can also be integrally formed with the platform, with the connection area transitioned by a rounded arc to reduce stress concentration.

[0067] The above is only an illustrative example and does not limit the specific structure of the reinforcement structure 105.

[0068] In this embodiment, the second connection platform 1022 is used to connect the third connector 103, and the third connector 103 is used to connect the sensor assembly 104.

[0069] The second connection platform 1022 can be pre-set with installation space for the sensor assembly 104 and the third connector 103, without occupying the original height space of the carbon slide plate 303.

[0070] The dimensions of the second connecting platform 1022 can be determined based on the dimensions of the third connector 103 and the sensor assembly 104. There are no specific limitations, as long as the second connecting platform 1022 can support the third connector 103 and the sensor assembly 104.

[0071] In some embodiments, a fixing position is provided at a preset position on the second connection platform 1022 for fixed connection with the third connector 103.

[0072] Specifically, the fixing position can be a hole structure, which can be a smooth structure, a threaded structure, or have other limiting structures, and there is no limitation thereto.

[0073] In some embodiments, the third connector 103 may be a connecting block, which may be provided with a third positioning hole 1063. The third positioning hole 1063 is aligned with the fixing position on the second connecting platform 1022, and is fixed with bolts, nuts and other related fixing devices to fix the third connector 103 on the second connecting platform 1022.

[0074] In some embodiments, the third connector 103 may be a snap-fit ​​structure. In this case, the fixing position of the second connecting platform 1022 may be a limiting groove adapted to the snap-fit ​​structure, so that after the snap-fit ​​structure is snapped into the limiting groove, the third connector 103 is fixedly connected on the second connecting platform 1022.

[0075] In some embodiments, one end of the third connector 103 is connected to the sensor assembly 104, and the other end is provided with a third positioning hole 1063, through which the sensor assembly 104 is fixed on the second connecting platform 1022.

[0076] Similar to the positioning holes in other locations, the diameter and position of the third positioning hole 1063 on the third connector 103 correspond to the holes on the second connecting platform 1022. With the help of bolts, a detachable connection can be achieved, which is conducive to quick alignment and installation.

[0077] The third connector 103 connects the second connection platform 1022 and the sensor assembly 104, which can avoid the compatibility problem caused by the direct connection of the sensor assembly 104 to the second connection platform 1022. Through the size adaptation of the third connector 103, sensor assemblies 104 of different specifications can be matched with the device, while dispersing the local force on the sensor and reducing the risk of damage under high frequency vibration.

[0078] In some embodiments, the connection between one end of the third connector 103 and the sensor assembly 104 can be a bolt fastening connection. For example, a threaded hole can be reserved at a preset position of the sensor assembly 104, and a bolt can be provided at the corresponding end of the third connector 103. The bolt is screwed into the threaded hole for fixation, resulting in high connection strength and ensuring gapless pressure transmission through pre-tightening force.

[0079] In some embodiments, the connection between one end of the third connector 103 and the sensor assembly 104 can be fixed by welding. The connection end between the third connector 103 and the sensor assembly 104 is fixed by welding to form an integrated structure.

[0080] This is merely an example and does not constitute a specific limitation on the connection method between one end of the third connector 103 and the sensor assembly 104.

[0081] In some embodiments, the sensor assembly 104 includes a force-bearing structure 107 and a sensor. The third end of the force-bearing structure 107 is connected to the second end of the first connector 101, and the fourth end of the force-bearing structure 107 is connected to the sensor. The force-bearing structure 107 is used to bear the contact pressure of the rigid structure mesh and transmit the contact pressure to the sensor.

[0082] The force-bearing structure 107 can be a rigid metal component, such as a metal rod. The dimensions of the force-bearing structure 107 can be flexibly adjusted to fit the installation distance between the first connector 101 and the sensor, while avoiding direct impact load on the sensor and ensuring that the overall installation does not change the original height of the carbon slide plate 303, thus guaranteeing driving safety.

[0083] By dispersing and directionally transmitting pressure through the force-bearing structure 107, the sensor is ensured to bear only axial pressure, avoiding measurement deviations caused by lateral forces, while reducing damage to the sensor from high-frequency vibrations and extending its service life.

[0084] In some embodiments, the third end of the force-bearing structure 107 may be provided with a fourth positioning hole 1064, and the second end of the first connector 101 may be provided with a hole structure adapted to the fourth positioning hole 1064, and the two are aligned and fastened together by bolts and nuts.

[0085] In some embodiments, an external thread may be provided at a preset position of the sensor, and an internal thread hole may be provided at the fourth end of the force-bearing structure 107, so that the force-bearing structure 107 can be connected to the sensor by tightening the threaded sleeve.

[0086] In some embodiments, the sensor may be provided with a flange, and the fourth end of the force-bearing structure 107 may be provided with a flange with a positioning hole, which may be aligned with the flange of the sensor and fastened with bolts to achieve a detachable connection between the force-bearing structure 107 and the sensor.

[0087] This is provided as an example only and does not constitute a limitation on any specific solution.

[0088] In some embodiments, the sensor may be a strain gauge pressure sensor. Pressure sensors are an important component for measuring the contact pressure of rigid contact wires. During the operation of vehicles, there is strong electromagnetic interference due to the presence of high voltage. Therefore, as a preferred embodiment, a strain gauge pressure sensor may be used.

[0089] The strain gauge pressure sensor uses a metal bellows as the sensing element, converting the applied force into an electrical signal. When the pressure on the carbon slide plate 303 changes, the metal bellows experiences pressure or tension, resulting in elastic deformation. This deformation causes a change in the resistance of the strain gauges welded to it. The changing resistance value is converted into an electrical signal by the detection circuit. These electrical signals are proportional to the force applied to the metal bellows. Finally, each sensor's electrical signal is amplified and filtered, and the electrical signals directly related to the load are summarized and sent to the display system to display the real-time pressure value of the carbon slide plate 303 in calculated digital form.

[0090] In some embodiments, the sensor may also be a piezoelectric pressure sensor, a capacitive pressure sensor, or a fiber optic pressure sensor.

[0091] In some embodiments, the sensor assembly 104 further includes a cable 108 configured to transmit electrical signals generated by the sensor to a data acquisition device.

[0092] One end of cable 108 connects to a sensor (such as the signal output end of a strain gauge built into a metal bellows), and the other end connects to a data acquisition device for communication, transmitting the electrical signal converted by the sensor to the acquisition device in a directional manner. Cable 108 can be a shielded cable with an outer metal shielding layer to reduce the impact of electromagnetic interference from the high-voltage contact network on the electrical signal, avoid signal distortion, and ensure data reliability. Cable 108 can also have vibration resistance and high / low temperature resistance to adapt to different environmental requirements.

[0093] The pressure generated by the contact between the rigid contact wire and the carbon slide plate 303 is transmitted to the load-bearing structure 107. The load-bearing structure 107 rigidly supports the load, preventing the pressure from directly impacting the core components of the sensor (such as the metal bellows). The load-bearing structure 107 does not deform significantly and can transmit the received pressure to the sensor in a preset direction (axial direction), ensuring that the sensor only bears pressure perpendicular to the sensitive element (metal bellows) and avoiding measurement deviations caused by lateral forces.

[0094] In some embodiments, a lithium battery can directly supply DC24V to the data acquisition device, which then powers the sensors and acquires data. The data acquisition device and the in-vehicle equipment use optical transmission to aggregate and calculate the pantograph-catenary contact force. Air-isolated optical transmission effectively solves the electromagnetic interference problem of the overhead contact line's high voltage, achieving reliable high and low voltage isolation and safe data signal transmission.

[0095] In some embodiments, two sets of sensor components 104 are provided on each of the second connection platforms 1022, and the two sets of sensor components 104 provided on the same second connection platform 1022 are symmetrically distributed on both sides of the second connection platform 1022.

[0096] Specifically, each second connection platform 1022 is equipped with two sets of sensor assemblies 104. A set of sensor assemblies 104 is provided on each side of the same second connection platform 1022, such as the left and right sides of the second connection platform 1022, symmetrical about the central axis of the second connection platform 1022, to ensure that the sensor assemblies 104 are evenly and stably distributed on both sides of the pantograph bracket 302.

[0097] The four sets of sensor assemblies 104, evenly distributed on both sides of the pantograph bracket 302, can comprehensively capture pressure, avoiding single-point measurement deviation and more closely reflecting the actual pantograph-catenary contact pressure. The symmetrical distribution of the sensor assemblies 104 ensures that the second connecting platform 1022 experiences forces in a centrally symmetrical manner, avoiding localized stress concentration. Symmetrical installation does not increase the thickness of the tooling, does not change the original distance between the carbon sliding plate 303 and the pantograph, and ensures that the height of the carbon sliding plate 303 does not exceed the limit and that it is raised horizontally.

[0098] The device in this embodiment ensures that the height of the carbon slide plate 303 remains unchanged after the sensor is installed through the coordinated connection between different components, thereby ensuring the authenticity of the collected contact pressure data and driving safety. By converting electrical signals into optical transmission, the insulation and anti-interference capabilities of the detection device are improved, ensuring the reliability of the data.

[0099] Compared with existing direct contact measurement technologies, the device provided in this application for measuring contact pressure of the overhead contact line improves the reliability of the sensor and tooling during dynamic detection and reduces the impact on the pantograph during operation. The pressure sensor is installed on the side of the pantograph bracket 302, and the height of the carbon sliding plate 303 remains unchanged, thus not affecting the self-leveling function of the carbon sliding plate 303.

[0100] It should also be understood that the first, second, third, fourth and various numerical designations used herein are merely for descriptive convenience and are not intended to limit the scope of this application.

[0101] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0102] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A device for measuring the contact pressure of a rigid contact wire, characterized in that, The device includes: a first connector, a second connector, a third connector, and a sensor assembly, wherein, The first end of the first connector is provided with a first positioning hole for detachable connection with the pantograph head through the first positioning hole, and the second end of the first connector is used to connect the sensor assembly. The second connector includes a first connecting platform and a second connecting platform connected via a connecting plate. The first connecting platform is provided with a second positioning hole for detachably connecting the first connecting platform to the pantograph bracket through the second positioning hole. The second connection platform is used to connect to the third connector, and the third connector is used to connect to the sensor assembly.

2. The apparatus according to claim 1, characterized in that, There are two first connectors, which are respectively disposed on both sides of the second connector.

3. The apparatus according to claim 1 or 2, characterized in that, The first connector is a U-shaped structure, with the first end located on the horizontal structure of the U-shaped structure and the second end located on the vertical structure of the U-shaped structure.

4. The apparatus according to claim 3, characterized in that, Two protrusions are provided on the first end, and the two protrusions are arranged opposite each other on both sides of the horizontal structure. A first positioning hole is provided on the protrusion, and the position of the first positioning hole corresponds to the position of the through hole on the pantograph head.

5. The apparatus according to claim 1, characterized in that, The second connector includes a first connecting platform and two second connecting platforms. The two second connecting platforms are symmetrically arranged on both sides of the first connecting platform via connecting plates, and the plane of the second connecting platform is located below the plane of the first connecting platform.

6. The apparatus according to claim 1, characterized in that, The position of the second positioning hole on the first connecting platform corresponds to the position of the through hole on the pantograph bracket.

7. The apparatus according to claim 5, characterized in that, An enhancement structure is provided in the connection area between the first connection platform and the second connection platform.

8. The apparatus according to claim 1, characterized in that, The sensor assembly includes a force-bearing structure and a sensor. The third end of the force-bearing structure is connected to the second end of the first connector, and the fourth end of the force-bearing structure is connected to the sensor. The force-bearing structure is used to bear the contact pressure of the rigid structure mesh and transmit the contact pressure to the sensor.

9. The apparatus according to claim 1, characterized in that, One end of the third connector is connected to the sensor assembly, and the other end is provided with a third positioning hole, through which the sensor assembly is fixed to the second connecting platform.

10. The apparatus according to claim 9, characterized in that, Two sets of sensor components are provided on each of the second connection platforms, and the two sets of sensor components on the same second connection platform are symmetrically distributed on both sides of the second connection platform.

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