362 results about "Pantograph" patented technology

The invention discloses a railway pantograph carbon slide plate wear detection method based on machine vision, and the method comprises the steps: firstly carrying out the illumination enhancement of a pantograph image through employing an SCI model which introduces a channel attention mechanism, and carrying out the super-resolution reconstruction of the pantograph image after the illumination enhancement through employing a Real-ESRGAN model; secondly, an improved M3Net model is adopted to carry out pantograph carbon slide plate area positioning, an improved M3Net model encoder adopts a residual error post-standardization structure and logarithm interval continuous relative position deviation method, a decoder adopts an MIB module and an MAB module, and then a DexiNed model introducing a CA block and a space attention mechanism is adopted to carry out carbon slide plate abrasion edge detection; and finally, judging whether uneven wear exists or not according to a wear edge detection result. According to the railway pantograph carbon slide plate wear detection method disclosed by the invention, the problem of large wear detection error of the carbon slide plate under the condition of poor image quality or complex background in the existing method is solved.

The invention relates to a real-time pantograph anomaly detection method based on image processing, and the method comprises the steps: building a pantograph anomaly detection model, training the model, collecting the image data and operation data of a pantograph in a train operation process in real time, transmitting the image data and operation data of the pantograph to a mercuric chloride chip, and carrying out the collection of the image data and operation data of the pantograph. Image data are input into the convolutional neural network unit for feature extraction, and operation data are input into the full-connection neural network unit for analysis; a pantograph region in the image data of the pantograph is extracted, secondary detection of a specified key point is carried out, and the abnormal condition of the pantograph is judged; if it is judged that the pantograph is abnormal in the two times of detection, the corresponding position is reported to a defect alarm, and a maintainer repairs the corresponding position; and if only one of the two times of detection is judged to be abnormal, the corresponding image is put into a suspected defect library, and if the position is abnormal again, an abnormal alarm is given, so that the accuracy and the real-time performance of the abnormal detection of the pantograph are effectively improved.

The invention relates to the technical field of pantograph-catenary system monitoring, and discloses a nonlinear pantograph-catenary system state prediction method based on a physical information neural network, and the method comprises the steps: obtaining the structural parameters of a catenary and a pantograph in a nonlinear pantograph-catenary system, and the train speed; a multi-expert Mama network based on Fourier transform is constructed; utilizing the first full connection layer to map input features formed by the structural parameters of the contact net and the pantograph and the train speed to a high-dimensional feature space to obtain first high-dimensional features; frequency domain features are extracted from the first high-dimensional features by using a plurality of cascaded multi-expert Mamba network layers, and time sequence features are modeled at the same time; fusing the spliced frequency domain feature and the time sequence feature by using a second full connection layer to obtain a second high-dimensional feature fusing the time-frequency energy and the dynamic evolution information; and performing nonlinear pantograph-catenary system state prediction according to the second high-dimensional features. According to the invention, the state prediction accuracy of the nonlinear pantograph-catenary system can be improved.

The invention discloses a self-adaptive grinding control method and system for a rigid contact network, and belongs to the technical field of maintenance of rail transit power supply equipment. The method comprises the following steps: acquiring pantograph-catenary action historical data of each position of the contact network along a busbar direction, and constructing a contact line damage index distribution curve; identifying a high damage interval based on the damage index, extracting roughness, ripple amplitude and oxidation thickness parameters, constructing a damage intensity vector, and calculating a damage grade score of each position by adopting a fuzzy comprehensive evaluation method; a preset polishing strategy library is matched according to the scoring result, a corresponding polishing wheel combination, the rotating speed and the contact pressure are determined, and a control parameter set is generated; the grinding device dynamically adjusts the working state according to the control parameters in the advancing process. The method achieves full-process self-adaptive closed-loop control of state recognition, strategy decision, execution control and quality feedback of contact line grinding operation.

The invention relates to the technical field of pantograph carbon contact strip abrasion, and particularly discloses a pantograph carbon contact strip abrasion self-adaptive detection system based on multi-sensor fusion, which comprises a carbon contact strip data acquisition module, a comprehensive abrasion degree generation module, a self-adaptive adjustment generation module, an abrasion risk judgment module and a database, according to the method, surface images, edge thickness, real-time temperature and dynamic contact pressure data are collected through a camera and a multi-source sensor, the direct abrasion degree and the indirect abrasion degree are calculated, then the comprehensive abrasion degree is obtained, the historical mean value and the standard deviation of the abrasion degree are calculated according to historical data, and the comprehensive abrasion degree is obtained. The current comprehensive abrasion degree deviation degree is combined to adjust the abrasion threshold sensitivity and generate a dynamic abrasion threshold, and the detection period is adjusted accordingly, so that the defects of singleness and fixed threshold of a traditional detection method are overcome, the detection accuracy and the operation and maintenance efficiency are improved, an intelligent solution is provided for state management of the pantograph carbon contact strip, and the detection efficiency is improved. And train operation safety is guaranteed.

The invention provides a training method of a pantograph fault judgment model, a fault judgment method and a train, and relates to the technical field of rail trains. The training method comprises the steps of obtaining a fault training set; and iteratively executing operation 1-operation 3: operation 1, inputting the modal information into an initial neural network corresponding to the modal information, and outputting modal features of the modal information; operation 2, the multiple modal features of the training sample are processed through a classification fusion network, a state prediction result is obtained, the state prediction result represents whether the pantograph breaks down or not, and the classification fusion network is constructed based on multiple target attention networks and a target classifier; 3, adjusting model parameters of an initial judgment model according to the state prediction result and the state label, wherein the initial judgment model comprises a plurality of initial neural networks and a classification fusion network; and under the condition of model parameter convergence, determining the initial judgment model as a trained pantograph fault judgment model.

The invention discloses a pantograph-contact network system operation performance evaluation method and system. The method comprises the following steps: firstly, collecting data in real time, normalizing the collected data, and screening key hidden dangers which have power-off risks and need speed reduction operation through a two-stage risk rapid judgment mechanism; after hidden dangers are eliminated, an analytic hierarchy process is adopted to calculate index weights and initial weights of all parameters, then information entropies of all the parameters are calculated based on an improved entropy weight method to determine the dispersion degree, and real-time dynamic adjustment of the parameter weights is achieved through a combined weight method; and finally, by applying a fuzzy comprehensive evaluation method and combining the dynamically adjusted parameter weights and the membership degrees of the parameters, calculating the operation performance score of each index, then obtaining the comprehensive score of the operation performance of the pantograph-catenary system, and judging the performance grade according to the score interval. The method and the system provided by the invention are suitable for accurate evaluation of the operation performance of the icing galloping section pantograph-catenary system, and can quickly identify the operation risk and scientifically judge the performance grade.

The invention discloses a bow net offline electromagnetic interference multichannel data acquisition and analysis method and device, and belongs to the technical field of electromagnetic interference test and analysis. A transient electromagnetic signal of pantograph-catenary discharge is acquired through cooperation of multiple antennas, multiple probes and multiple channels, and strict alignment of multi-source data under the same discharge event is realized through unified triggering and time base line unification; in the off-line stage, denoising, feature extraction and multi-event statistical modeling are carried out on data generated by triggering, so that multi-path and multi-mode electromagnetic characteristics of pantograph-catenary discharge and statistical laws of the multi-path and multi-mode electromagnetic characteristics of pantograph-catenary discharge are obtained; the device comprises a data acquisition unit, a synchronous trigger unit, an analysis processing unit and an interactive display unit, and can improve data processing efficiency and analysis depth while ensuring high sampling rate and broadband coverage; the device solves the problems of insufficient space coverage, poor synchronism and limited analysis capability in the existing pantograph-catenary discharge test, and is suitable for pantograph-catenary discharge mechanism research, electromagnetic interference evaluation and related engineering application.

This invention discloses a method and system for acquiring pantograph contactor images, belonging to the field of railway power supply contact network detection technology. It uses a photoelectric sensor signal as a trigger. When the photoelectric sensor module detects an approaching train, it controls the pantograph imaging module to take a picture based on a system-preset speed and the radar's measured speed. After the train passes, the image's stretching / compression ratio is calculated based on the radar's final detected speed and the system-preset speed. The identified pantograph contactor image is then stretched, compressed, and segmented to obtain the final pantograph contactor image. By introducing a photoelectric sensor, both the sensor and radar can identify approaching trains. Furthermore, by combining the imaging process based on real-time radar speed measurement and a system-preset speed, even if a train is missed by the radar, the entire image acquisition process can be completed based on the photoelectric sensor's identification and the system-preset speed, avoiding the problem of missed trains by the radar.

The utility model discloses an anti-freezing rain pantograph lower arm gas circuit, which is characterized in that a gas pipe is arranged in an inner cavity of a lower arm rod, penetrates out of the side wall of the lower arm rod through a plate penetrating joint, and is fixed on the side wall of the lower arm rod. The plate-penetrating connector penetrates through a hole in the center of the circular plate, two ends of the plate-penetrating connector are locked by nuts, and the circular plate is fixed on the lower arm rod through screws. The two ends of the plate penetrating connector are respectively provided with a clamping sleeve nut, the opposite ends of the two clamping sleeve nuts are respectively provided with a thin nut, after the two clamping sleeve nuts are oppositely tightened, the two thin nuts are tightened, and the plate penetrating connector is fixed to the circular plate through the two thin nuts. And the air path is arranged in the lower arm, so that the air path can be prevented from being damaged by the falling ice, and the stability of the pantograph running in the freezing rain weather is improved.

The invention discloses a special test device for a pantograph of an electrified road. The special test device comprises a simulated contact net unit, a transverse moving sliding table, a transverse moving sliding table, a vertical moving sliding table, a pantograph moving platform and a flexible supporting platform, a pressure sensor is arranged in the middle of the simulation contact network unit; an electric cylinder is arranged in the middle of the flexible supporting platform and used for achieving the inclination angle function, and a pantograph installation platform is arranged on the upper portion. The vertical moving sliding table is located on the transverse moving sliding table, and the simulation contact network is designed to be an independent unit which can move transversely and vertically and is provided with elastic buffering. And multiple key performance tests such as static / dynamic contact pressure, pantograph lifting height, pantograph lifting time, off-network rapid pantograph lifting and durability can be completed, the simulation trueness is high, and the defects in the prior art are overcome.

The utility model discloses a pantograph upper frame supporting tool which comprises a connecting frame. Uniformly distributed supporting legs are fixedly connected to the lower surface of the connecting frame, a third supporting rod is fixedly connected to the middle of the upper surface of the connecting frame, a second supporting rod is fixedly connected between the front surface of the third supporting rod and the front side of the upper surface of the connecting frame, and a second supporting rod is also fixedly connected between the rear surface of the third supporting rod and the rear side of the upper surface of the connecting frame; a first supporting rod is fixedly connected between the left surface of the third supporting rod and the left side of the upper surface of the connecting frame, and a first supporting rod is also fixedly connected between the right surface of the third supporting rod and the right side of the upper surface of the connecting frame. In the aspect of safety, the risks of crushing injury, falling and the like caused by manual lifting are avoided, in the aspect of operation efficiency, the operation time of the operation is shortened, and the utilization rate of personnel is increased.

The application discloses a high-speed railway pantograph-catenary arc electromagnetic radiation interference modeling analysis method, constructs a pantograph-catenary arc-pantograph power supply system integrated model containing a traction substation model, a traction network model, a train traction transmission system model, a train-track return current grounding system model and a pantograph-catenary arc model; under a pantograph-off arc transient condition, arc current is obtained through simulation calculation; and based on the arc current, a relationship between arc radiation power and spatial equivalent electric field intensity is established to represent the influence of time-varying characteristics of traction network electrical parameters on pantograph-catenary arc electromagnetic radiation interference. Under the pantograph-off arc transient condition, the real-time changes of impedance and capacitive reactance parameters of the traction network are involved in the unified solution of arc current formation, radiation power evolution and spatial electric field intensity calculation, and meanwhile, key coupling factors of the train high-voltage system and the train-track grounding system are mainly considered, so that the accuracy and engineering applicability of pantograph-catenary arc electromagnetic radiation interference analysis are improved.

A high-speed rail pantograph carbon contact strip abrasion detection method comprises the steps that carbon contact strip point cloud profile data of a high-speed rail pantograph are obtained through a single-line laser sensor; processing the data by adopting a motion blur correction algorithm based on spatial range screening and reflection intensity screening to obtain effective point cloud data; statistical filtering is carried out on the effective point cloud data, then normalization processing is carried out, and normalized effective point cloud data are obtained; obtaining a first demarcation point and a second demarcation point of the pantograph horn and the carbon contact strip by adopting a reflection characteristic identification method and a characteristic point identification method respectively; screening and integrating to obtain a final demarcation point, and intercepting to obtain an actually measured carbon slide plate point cloud data set; and comparing and registering the actually measured point cloud data set of the carbon contact strip and the point cloud data set of the standard carbon contact strip by adopting a point-to-surface ICP (Inductively Coupled Plasma) registration method so as to calculate the abrasion value and the over-limit abrasion area of the pantograph carbon contact strip. According to the invention, high-efficiency and high-precision detection of high-speed railway pantograph carbon contact strip abrasion can be realized.

A method and a device for diagnosing a defect in a pantograph of a railway vehicle and calculating its remaining service life are disclosed. The method may include setting a status value for diagnosing the pantograph, building a database with indexes for diagnosing the pantograph, comparing a detected index with a reference index, and storing a defect code of the pantograph if the detected index is greater than the reference index in the database.The status value can refer to the pressure of an actuator when the pantograph is raised before the rail vehicle is in motion, to the actuator pressure while the rail vehicle is in motion, to the number of arcing occurrences or the duration of arcing events while the rail vehicle is in motion, to an insulation resistance while the rail vehicle is in motion, or to the wear amount of a main wear slider. Furthermore, the device configured to carry out the method is disclosed.

The application discloses a rigid contact net self-adaptive polishing control method and system, belongs to the technical field of track traffic power supply equipment maintenance, obtains the pantograph-catenary action historical data of each position along the busbar direction of the contact net, and constructs a contact wire damage index distribution curve; based on the damage index, a high damage interval is identified, roughness, corrugation amplitude and oxidation thickness parameters are extracted, a damage intensity vector is constructed, and a fuzzy comprehensive evaluation method is used to calculate the damage level score of each position; according to the scoring results, a preset polishing strategy library is matched, corresponding polishing wheel combinations, rotating speeds and contact pressures are determined, and a control parameter set is generated; the polishing device dynamically adjusts the working state according to the control parameters in the running process, and the method realizes the whole-process self-adaptive closed-loop control of state recognition, strategy decision, execution control and quality feedback of the contact wire polishing operation.

The application discloses a pantograph head device and a railway vehicle, and relates to the technical field of rail transit. The pantograph head device comprises a single-slipper head, the inner side of the single-slipper head is provided with a first connecting assembly and a second connecting assembly; two spring cylinders are symmetrically arranged about the middle section of the single-slipper head, one of the two spring cylinders is connected to the single-slipper head through the first connecting assembly, and the other of the two spring cylinders is connected to the single-slipper head through the second connecting assembly; and a connecting shaft is used for fixedly connecting the two spring cylinders, and the length direction of the two spring cylinders is perpendicular to the extension direction of the single-slipper head. The pantograph head device provided by the application can effectively reduce the wind resistance and the mass of the head; in addition, the two spring cylinders are symmetrically arranged about the middle section of the single-slipper head, the airflow flows along the length direction of the spring cylinders, so that the structure of the pantograph head device is compact, and the layout is more reasonable.

The invention discloses an electric control lifting mechanism of a model pantograph, and effectively solves the problem that an electric control lifting pantograph device of an existing electric locomotive model is poor in appearance simulation degree. Comprising a model pantograph module and an electric control driving module. The model pantograph module comprises a sliding plate model and two four-bar mechanisms which are connected in series, and the sliding plate model can ascend or descend under the control of the electric control driving module; the electric control driving module is arranged at the lower part of the model pantograph module; the electric control driving module drives the sliding plate model to lift by stretching and releasing a rope penetrating through a central hole of a circuit breaker insulator mimic pull rope sleeve; the device is simple in structure, novel in conception, convenient to use and high in practicability.

The invention belongs to the technical field of pantograph polishing devices, and discloses an in-situ polishing device for a pantograph. The in-situ polishing device for the pantograph comprises a frame body, the clamping assembly can be installed on the frame body in a sliding mode in the first direction and is used for clamping the pantograph carbon contact strip to be polished; the polishing assembly can slide in the second direction and can be rotationally installed on the frame body with the straight line where the third direction is located as the axis, and every two of the first direction, the second direction and the third direction are perpendicular to each other; and the follow-up assembly is arranged between the grinding assembly and the frame body. Through the arrangement of the clamping assembly, the to-be-polished pantograph carbon contact strip can be polished without disassembling and assembling the to-be-polished pantograph carbon contact strip, and through the cooperation of the polishing assembly and the follow-up assembly, the polishing assembly can be always in contact with the pantograph carbon contact strip, so that the polishing effect is improved; and meanwhile, the grinding assembly is prevented from being adjusted in the grinding process, and therefore the grinding efficiency is improved.

The application discloses a pantograph operation state monitoring analysis method and system, relates to the field of track train monitoring, and mainly has the following scheme: through comprehensive analysis on vibration data, contact force data, contact point temperature data and abrasion data, whether a pantograph pressure control instruction is triggered, whether a train speed limit instruction is triggered and whether a pantograph operation failure exists are judged, a passive early warning strategy is changed into an active regulation and control, the operation state of the pantograph can be more comprehensively evaluated, through intelligent monitoring and prediction technology, the frequency and cost of manual detection are reduced, the evaluation accuracy is improved, and meanwhile, maintenance cost and safety risks caused by failure expansion are avoided.

The invention discloses a pantograph test auxiliary device, which belongs to the technical field of mechanical engineering and automation, and comprises a base, the top of the base is fixedly connected with a servo motor, the servo motor is in transmission connection with a lead screw through an internal rotating shaft, the side surface of the lead screw is engaged with a sliding rod, and the side surface of the sliding rod is rotationally connected with a power rod. One end of the driven rod is rotatably connected with a fixed block; one end of the driven rod and one end of the power rod are rotatably connected with supporting lugs; the tops of the supporting lugs are fixedly connected with a lifting platform; the top of the lifting platform is fixedly connected with a hollow rod; the side surface of the hollow rod is rotatably connected with a test rod through a rotating shaft, and the test rod is slidably connected with a slider and a balance block. Through the synergistic effect of the shear fork type lifting mechanism and the pulley, the linkage rapid unfolding and in-place of the device after the device enters the test station are realized, and the efficiency and the automation level of the test preparation stage are effectively improved.

In a tensioning device for extending a planar body, this invention provides a technology that reduces the likelihood of distortion, vibration, and other issues occurring in the extended planar body. [Solution] The tensioning device comprises a housing, a planar body that is pulled out from the housing when in use and retracted into the housing for storage when not in use, a pantograph mechanism positioned on the back side of the planar body and supporting the upper edge of the planar body, the pantograph mechanism which folds when the planar body is stored and pulls out the planar body from the housing and tensions the planar body vertically by performing an upright movement from the folded position, a reinforcing member that extends along the width direction of the planar body and tensions the planar body in the width direction, and a lift-up suppression mechanism that suppresses the lift-up of the planar body relative to the pantograph mechanism when the pantograph mechanism is in an upright position.

This invention discloses a method and system for identifying abnormal wear conditions of pantograph carbon sliding plates based on random forest, belonging to the field of fault diagnosis and intelligent operation and maintenance. The method collects characteristic data of pantograph carbon sliding plate wear; preprocesses the characteristic data, and establishes an input matrix and a target vector based on the preprocessed characteristic data; uses the input matrix and target vector as training data to train a random forest regression model, and fine-tunes the parameters of the random forest regression model through cross-validation to obtain a parametric model of abnormal wear of the pantograph carbon sliding plate; based on the feature importance index of the parametric model of abnormal wear of the pantograph carbon sliding plate, it identifies the key causes of abnormal wear of the pantograph carbon sliding plate. This method can identify the wear condition of the pantograph carbon sliding plate and analyze the key factors under abnormal wear conditions, playing a significant role in maintaining the safe operation of trains.

The invention discloses an electrified air bag type intelligent pantograph, an operation method of the electrified air bag type intelligent pantograph and a vehicle, and belongs to the technical field of vehicle power receiving equipment. The intelligent pantograph comprises a base, a lower pantograph arm, a lower balance rod, an upper pantograph arm, an upper balance rod, a pantograph head, an air bag driving device, an air driving control unit, a linear driving device, a position sensor and an intelligent control system, wherein the lower pantograph arm and the lower balance rod are movably connected with the base; the upper pantograph arm and the upper balance rod are movably connected with the top end of the lower pantograph arm; according to the pantograph, the pantograph head can be driven to move only through the linear driving device to keep good contact with the sliding plate, better following performance and dynamic responsiveness are achieved, and the current collection stability and operation safety of the pantograph are improved. Meanwhile, intelligent design is adopted, the relative position of the pantograph catenary is detected in real time, when the contact duration of the contact position of the sliding plate exceeds preset time, the linear driving device is driven to transfer the contact area of the sliding plate and the catenary, and the problem that the service life is shortened due to local excessive abrasion of the sliding plate is effectively solved.

The invention discloses a self-adaptive pantograph-catenary intelligent control method, system and device and a storage medium, and the method comprises the steps: obtaining to-be-detected data of a pantograph-catenary system, analyzing the position and state of the pantograph-catenary system based on the to-be-detected data, judging whether the operation state of the pantograph-catenary system is abnormal or not according to an analysis result, and if the operation state of the pantograph-catenary system is abnormal, executing the step 1; if yes, self-adaptive adjustment is conducted on the pantograph-catenary system, whether foreign matter exists in the catenary or not is judged based on the pantograph image, and if yes, alarm information is sent out. An intelligent monitoring system fused by multiple sensors such as a laser radar and a high-definition camera is adopted, a multi-source heterogeneous data intelligent fusion and analysis technology is integrated, the relative position relation and state of the pantograph head carbon sliding plate and the contact line are monitored in real time, and whether response and adjustment are needed or not is analyzed and judged through an intelligent algorithm; therefore, automatic control, adjustment and alarm are realized, the pantograph and the overhead line system are ensured to be in a safe working state in a complex and changeable environment, and the current collection performance is good.

The application provides a kind of intelligent monitoring method and device for pantograph, it is related to train safety monitoring field, solve in the pantograph monitoring, ignore the quality irregularity reduction problem caused by contact pressure and temperature of pantograph, and ignore the technical problem of adaptive monitoring to pantograph;The method comprises: obtaining the target data of current train pantograph;Adaptively set monitoring frequency based on target data, obtain the monitoring data of current train pantograph according to monitoring frequency;Determine the temperature aging factor based on the temperature of pantograph, determine the characteristic temperature aging factor of current pantograph based on the historical temperature aging factor;Determine the wear factor based on the contact pressure of pantograph, determine the characteristic wear factor of current pantograph based on the historical wear factor, issue the maintenance notice of current pantograph based on characteristic temperature aging factor and characteristic wear factor;The application can improve the accuracy of pantograph health quality identification.

This invention provides a dual-head pantograph, comprising a base frame, a hinge system, pantograph heads, and a pneumatic control system. The hinge system includes a first hinge system and a second hinge system, with different maximum heights at which they are raised. The first and second hinge systems are fixed to the base frame. The pantograph heads include a first pantograph head and a second pantograph head, respectively fixed to the top ends of the first and second hinge systems. The first and second pantograph heads are located at the upper parts of opposite ends of the base frame. This invention's dual-head pantograph uses a shared base frame and two independent hinge systems, each mounting a pantograph head with a different structure. The two pantograph heads are located at the upper parts of opposite ends of the base frame, and their raising and lowering are independent of each other, meeting the needs of different vehicle operations and current collection conditions. This invention's dual-head pantograph has a simple structure and low equipment cost.

The application discloses a carbon-copper composite material for a pantograph slide plate and a preparation method thereof. The carbon-copper composite material is prepared from the following components in percentage by mass: copper powder 65-68%, chromium powder 3-5%, tin powder 1-3%, titanium powder 1-3%, ultra-fine particle size calcined coke 10-13%, carbon fiber powder 9-11% and polysilazane resin 3-5%. The product prepared by the application has good self-lubricity and low resistivity, has good compressive strength, can maintain a long service life in a salt spray area environment, and has good economic prospects.

The application discloses a subway door defect and pantograph abrasion state synchronous detection unmanned aerial vehicle carrying device, and relates to the technical field of unmanned aerial vehicle equipment, which comprises a carrying frame, a top shooting mechanism, a clamping mechanism, a fixing mechanism and a side shooting mechanism arranged in sequence from front to back on the carrying frame, wherein the side shooting mechanism comprises an electric sliding rail, a hydraulic telescopic rod, a holder and a side camera, one side of the hydraulic telescopic rod is fixedly connected to a moving table of the electric sliding rail, the other end of the hydraulic telescopic rod is fixedly connected with the holder, and the bottom of the holder is connected with the side camera, and the top shooting mechanism is provided with a Y-shaped support rod and a holder, and a directional camera is arranged on the holder.

The utility model provides a kind of pantograph overhauling circuit, comprising first air switch, first fuse, first button, second button, first relay, second relay, third relay, first time relay, second time relay, first indicator light, second indicator light, first pressure controller, first differential pressure controller, first solenoid valve;The utility model is innovative design to air path and circuit, when opening U9 valve simulation air path leaks, solenoid valve is disconnected and closed, and total wind source is cut off.Real-time detection and safety control to air path are realized, problems in air path system can be found in time and handled through this innovative scheme, to avoid the occurrence of safety accident, pantograph overhauling work is provided with more safe and reliable guarantee.