CN111751369A - Detection system for pantograph system - Google Patents

Abstract

The invention discloses a detection system for a pantograph-catenary system, wherein the pantograph-catenary system comprises a contact net and a pantograph, the detection system comprises a contact force sensor, an acceleration sensor, an angular displacement height guide sensor and a data acquisition processor, the contact force sensor is configured to be capable of detecting dynamic contact force between the pantograph and the contact net, the acceleration sensor is configured to be capable of detecting vibration acceleration of a pantograph head, the angular displacement height guide sensor is configured to be capable of detecting a lifting amount and a pull-out value of the contact net, and the data acquisition processor is configured to be capable of receiving data measured by the sensors. According to the detection system for the pantograph and catenary system, accurate detection results of the pantograph and catenary running states can be obtained quickly even in real time, drivers/vehicle-mounted machinists can be helped to master the pantograph and catenary running states timely, quickly and accurately, and labor and time cost are greatly saved compared with the prior art.

Description

Detection system for pantograph system

technical field

The present invention relates to a pantograph-catenary system, such as a pantograph-catenary system for rail transit systems, and in particular to a detection system for a pantograph-catenary system.

Background technique

The change of the contact pressure between the pantograph and the catenary directly affects the current receiving performance. The contact pressure is small, which is easy to cause the pantograph to go offline and cause burns on the contact interface of the pantograph. On the contrary, when the catenary pressure is large, the contact line will be damaged. Partial bending will cause fatigue damage to the contact line, and at the same time, it will increase the wear of the skateboard and the contact line, increase the replacement frequency of the skateboard, increase the operating cost, and in severe cases, the skateboard or the contact line will be broken, resulting in pantograph catenary accidents.

In order to improve the reliability of the pantograph and catenary system, it is necessary to configure a detection device for the pantograph and catenary system, and obtain the operating status of the pantograph and catenary system through the monitoring device. The dynamic contact force of the pantograph, the hard point of the catenary, the pull-out value of the contact line, the lift of the contact line, and the arc between the pantograph and the catenary determine the contact characteristics of the pantograph.

In the early days, the manual observation and recording method was mostly used, and the information such as the arc pulling and the pull-out value between the pantograph and catenary were recorded by visual observation, and the fault location was recorded. This method has a large workload, many human factors, and large errors.

With the development of pantograph and catenary systems in fields such as rail transit and the improvement of automation, the modernization of detection equipment has been continuously improved. The existing detection equipment is divided into contact detection and non-contact detection, but the existing detection equipment still has low detection accuracy and difficult maintenance, and the detection results are easily affected by external factors such as sunlight, shading, and shooting shaking. In addition, obtaining various parameters of the pantograph-catenary system often requires staff to go to different installation locations in order to obtain the parameters collected by various monitoring devices, which takes a long time and consumes a lot of manpower. Therefore, the existing detection equipment is not conducive to the driver/vehicle mechanic to grasp the operation status of the pantograph in a timely, rapid and accurate manner.

Therefore, it is urgent to design a new detection system for pantograph-catenary system.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the existing detection equipment that has low detection accuracy, difficult maintenance, too long monitoring time and too much manpower, which is not conducive to the driver/vehicle mechanic to grasp the bow in a timely, rapid and accurate manner A new detection system for pantograph and catenary system is proposed to deal with the defects of the operating state of the net.

The present invention solves the above-mentioned technical problems by adopting the following technical solutions:

The invention provides a detection system for a pantograph system, the pantograph system includes a catenary and a pantograph, the pantograph has a pantograph head, and is characterized in that the detection system includes a contact force sensor , an acceleration sensor and an angular displacement sensor, the contact force sensor is configured to detect the dynamic contact force between the pantograph and the catenary, the acceleration sensor is configured to detect the power The vibration acceleration of the bow head, the angular displacement guide sensor is configured to be able to detect the lifting amount and the pull-out value of the catenary;

The detection system further includes a data acquisition processor configured to receive the dynamic contact force measured by the contact force sensor, the acceleration measured by the acceleration sensor, and the angle The lift amount and the pull-out value measured by the displacement guide sensor.

Preferably, the detection system further includes a data integration processing device and an optical fiber signal transmission line, the data acquisition processor has an optical fiber signal transmitter, and the optical fiber signal transmission line connects the optical fiber signal transmitter and the data integration processing device. , the optical fiber signal transmitter is configured to be able to convert the dynamic contact force, the acceleration, the lift amount and the pull-out value received by the data acquisition processor into optical fiber signals and via the optical fiber signals The transmission line is sent to the data integration processing device.

Preferably, the data integration processing device includes a first communication interface, a second communication interface and a third communication interface, the first communication interface is an RS485 interface or an RS232 interface, and the second communication interface is a USB interface, so The third communication interface is a multi-function vehicle bus interface.

Preferably, the detection system further includes a UPS power supply device (ie, an uninterruptible power supply) and an isolation transformer power supply device, and both ends of the isolation transformer power supply device are respectively connected to the UPS power supply device and the data acquisition and processing device. so that the data acquisition processor is powered by the UPS power supply device.

Preferably, the pantograph-catenary system further includes a train, the pantograph is arranged on the top of the train, and the contact force sensor, the acceleration sensor and the angular displacement sensor are installed on the power receiver. At the bow head of the bow, the data acquisition processor is mounted on the chassis of the pantograph.

Preferably, the detection system further comprises a net pressure sensor and a net flow sensor arranged on the top of the train, the net pressure sensor is configured to be able to detect the net pressure of the catenary, the net flow sensor is is configured to be able to detect the current transmitted by the catenary to the pantograph.

Preferably, the detection system further includes a camera device with an illumination light source, the camera device is configured to be able to send the captured image to the data integration processing device.

Preferably, the camera device includes an arcing capture camera and a video capture camera arranged on the top of the train.

Preferably, the detection system further includes a synchronous positioning device, and the synchronous positioning device is configured to obtain its own positioning information and send the positioning information to the data integration processing device.

Preferably, the data integration processing device is preset with an image recognition algorithm, and is configured to use the image recognition algorithm to process images captured by the arcing capture camera and the video capture camera to recognize the contact. Contact failure of the net and the pantograph.

Preferably, the image recognition algorithm includes:

Capture and save the images captured by the arcing capture camera and the video capture camera by frame;

The image frames formed by frame-by-frame interception are preprocessed by Gaussian filtering algorithm and image enhancement algorithm;

Extract the contour information based on the preprocessed image frame;

Carry out similarity calculation between the extracted contour information and the pre-stored standard image, and mark the image frame to which the similarity calculation result is less than a preset similarity threshold as an abnormal image frame;

It is judged whether there are continuous abnormal image frames with the number of continuous frames exceeding the preset continuous frame threshold, and when the judgment result is yes, the pantograph-catenary operating state fault alarm is output.

On the basis of conforming to common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

The positive progressive effect of the present invention is:

According to the detection system for pantograph-catenary system of the present invention, accurate pantograph-catenary operating state detection results can be obtained quickly and even in real time, without being affected by various unfavorable external factors, and can help drivers/vehicle mechanics in a timely and rapid manner , Accurately grasp the operation status of pantograph and catenary, which greatly saves manpower and time cost compared with the existing technology, and can help to ensure the reliable, safe and high-speed operation of equipment such as rail transit vehicles.

Description of drawings

FIG. 1 is a schematic diagram of a detection system for a pantograph-catenary system according to a preferred embodiment of the present invention.

FIG. 2 is a flowchart of an image recognition method for pantograph-catenary fault diagnosis adopted in the detection system for pantograph-catenary system according to a preferred embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. The following descriptions are exemplary rather than limiting of the present invention, and any other similar situations will also fall within the protection scope of the present invention.

In the following detailed description, directional terms, such as "left", "right", "upper", "lower", "front", "rear", etc., are used with reference to the directions described in the drawings. Components in various embodiments of the invention may be oriented in a variety of different orientations, and directional terminology is used for purposes of illustration and not limitation.

Referring to FIG. 1 , a detection system for a pantograph system according to a preferred embodiment of the present invention, the pantograph system includes a catenary and a pantograph, and the pantograph has a pantograph head. Wherein, the detection system includes a contact force sensor, an acceleration sensor and an angular displacement sensor, the contact force sensor is configured to be able to detect the dynamic contact force between the pantograph and the catenary, the acceleration The sensor is configured to detect the vibration acceleration of the pantograph head, and the angular displacement height sensor is configured to detect the lift amount and the pull-out value of the catenary.

Wherein, the detection system further includes a data acquisition processor, and the data acquisition processor is configured to receive the dynamic contact force measured by the contact force sensor, the acceleration measured by the acceleration sensor, and the The lift amount and the pull-out value measured by the angular displacement height sensor.

In this way, pantograph/catenary dynamic parameters such as the dynamic contact force of the pantograph, the hard point of the catenary, the pull-out value of the contact line, and the lifting amount of the contact line can be detected online in real time.

According to some preferred embodiments of the present invention, the detection system further includes a data integration processing device and an optical fiber signal transmission line, the data acquisition processor has an optical fiber signal transmitter, and the optical fiber signal transmission line connects the optical fiber signal transmitter and the optical fiber signal transmitter. The data integration processing device, the optical fiber signal transmitter is configured to be able to convert the dynamic contact force, the acceleration, the lift amount and the pull-out value received by the data acquisition processor into optical fiber signals and It is sent to the data integration processing device via the optical fiber signal transmission line.

The relevant detection data are converted into optical fiber signals for transmission, which can effectively avoid the interference of high voltage and high frequency environments on the detection data signals. At the same time, the optical fiber signal transmission line has the characteristics of strong anti-interference ability, low energy consumption and long transmission distance.

According to some preferred embodiments of the present invention, the data integration processing device includes a first communication interface, a second communication interface and a third communication interface, the first communication interface is an RS485 interface or an RS232 interface, and the second communication interface is a USB interface, and the third communication interface is a multi-function vehicle bus (MVB) interface.

For example, the first communication interface is suitable for RS485/232 communication protocol, which can be used for system software maintenance or data download; the second communication interface is suitable for general USB communication protocol, which can facilitate the download of recorded data; the third communication interface is suitable for vehicle MVB The communication protocol can be used for communication with the train control system or the ground control center. It can obtain information such as speed and mileage from the train, and at the same time upload the processed detection data to the driver in real time or wirelessly transmit it to the ground control center with the help of on-board equipment.

According to some preferred embodiments of the present invention, the detection system further includes a UPS power supply device and an isolation transformer power supply device, and both ends of the isolation transformer power supply device are respectively connected to the UPS power supply device and the data acquisition processor , so that the data acquisition processor is powered by the UPS power supply device.

According to some preferred embodiments of the present invention, the pantograph-catenary system further comprises a train, the pantograph is arranged on the top of the train, the contact force sensor, the acceleration sensor and the angular displacement sensor are installed At the bow head of the pantograph, the data acquisition processor is mounted on the chassis of the pantograph. Therefore, the data acquisition processor is in a charged state because it is located on the pantograph, so it needs to have anti-interference and anti-high-voltage breakdown performance.

According to some preferred embodiments of the present invention, the detection system further comprises a mesh pressure sensor and a mesh flow sensor arranged on the top of the train, the mesh pressure sensor is configured to be able to detect the mesh pressure of the catenary, so The mesh current sensor is configured to detect the current delivered by the catenary to the pantograph.

According to some preferred embodiments of the present invention, the detection system further includes a camera device with an illumination light source, the camera device being configured to be able to send the captured image to the data integration processing device.

According to some preferred embodiments of the present invention, the camera device includes an arcing capture camera and a video capture camera arranged on the top of the train.

According to some preferred embodiments of the present invention, the detection system further includes a synchronous positioning device configured to acquire its own positioning information and send the positioning information to the data integration processing device. In this way, positioning information such as speed and mileage in the synchronization test data can be collected in real time.

According to some preferred embodiments of the present invention, the data integration processing device is preset with an image recognition algorithm, and is configured to use the image recognition algorithm to process the images captured by the arc-burning capture camera and the video capture camera, To identify the contact failure of the catenary and the pantograph.

According to some preferred embodiments of the present invention, an image recognition algorithm can be used to automatically identify faults such as breakage and deformation of the pantograph and catenary, and the non-contact pantograph-catenary fault diagnosis scheme based on the image recognition algorithm can be used as the contact detection data. supplement.

Preferably, as shown in FIG. 2 , the image recognition algorithm may include the following steps:

Capture and save the images captured by the arcing capture camera and the video capture camera by frame;

The image frame formed by frame interception is preprocessed by using Gaussian filtering algorithm and image enhancement algorithm, and the preprocessing can also include processing methods such as angle rotation and scaling;

Extract the contour information based on the preprocessed image frame;

Carry out similarity calculation between the extracted contour information and the pre-stored standard image, and mark the image frame to which the contour information belongs to the similarity calculation result less than a preset similarity threshold (such as, the similarity threshold can be selected as 0.9). is an abnormal image frame;

Determine whether there are continuous abnormal image frames whose number of continuous frames exceeds a preset continuous frame threshold (eg, the continuous frame threshold can be selected as 300), and output a pantograph operating status fault alarm when the judgment result is yes.

By adopting the above preferred embodiments of the present invention or a combination thereof, the dynamic contact force of the pantograph, the hard point of the catenary, the pull-out value of the contact line, the lifting amount of the contact line, the pressure of the catenary net, the net flow and the fire between the pantograph and the catenary can be detected in real time online. Arc and other pantograph/catenary dynamic parameters, and video recording of pantograph and catenary status, at the same time, it can automatically identify the fault information in operation and report it to the train driver or ground control center in time to protect the pantograph and catenary from greater damage. damage to ensure reliable, safe and high-speed operation of rail transit vehicles.

Although specific embodiments of the present invention have been described above, those skilled in the art will understand that these are merely illustrative and the scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, and these changes and modifications all fall within the protection scope of the present invention.

Claims (11)

1. a detection system for pantograph and catenary system, described pantograph and catenary system comprises catenary and pantograph, pantograph has pantograph bow head, it is characterized in that, described detection system comprises contact force sensor, acceleration a sensor and an angular displacement sensor, the contact force sensor configured to detect a dynamic contact force between the pantograph and the catenary, the acceleration sensor configured to detect the pantograph The vibration acceleration of the head, the angular displacement guide height sensor is configured to be able to detect the lifting amount and the pull-out value of the catenary; The detection system further includes a data acquisition processor configured to receive the dynamic contact force measured by the contact force sensor, the acceleration measured by the acceleration sensor, and the angle The lift amount and the pull-out value measured by the displacement guide sensor. 2 . The detection system according to claim 1 , wherein the detection system further comprises a data integration processing device and an optical fiber signal transmission line, the data acquisition processor has an optical fiber signal transmitter, and the optical fiber signal transmission line connects the The optical fiber signal transmitter and the data integration processing device, the optical fiber signal transmitter is configured to be able to receive the dynamic contact force, the acceleration, the lift amount and the pull received by the data acquisition processor. The output value is converted into an optical fiber signal and sent to the data integration processing device via the optical fiber signal transmission line. 3. The detection system according to claim 2, wherein the data integration processing device comprises a first communication interface, a second communication interface and a third communication interface, and the first communication interface is an RS485 interface or an RS232 interface , the second communication interface is a USB interface, and the third communication interface is a multi-function vehicle bus interface. 4 . The detection system according to claim 1 , wherein the detection system further comprises a UPS power supply device and an isolation transformer power supply device, and both ends of the isolation transformer power supply device are respectively connected to the UPS power supply device. 5 . and the data acquisition processor, so that the data acquisition processor is powered by the UPS power supply device. 5. The detection system according to claim 2, wherein the pantograph-catenary system further comprises a train, the pantograph is arranged on the top of the train, the contact force sensor, the acceleration sensor and the The angular displacement guide height sensor is installed at the bow head of the pantograph, and the data acquisition processor is installed on the chassis of the pantograph. 6. The detection system of claim 1, wherein the detection system further comprises a mesh pressure sensor and a mesh flow sensor arranged on the top of the train, the mesh pressure sensor being configured to detect the The net pressure of the catenary, the net current sensor is configured to detect the current transmitted by the catenary to the pantograph. 7 . The detection system according to claim 5 , wherein the detection system further comprises a camera device with an illumination light source, the camera device is configured to be able to send the captured image to the data integration processing device. 8 . . 8 . The detection system according to claim 7 , wherein the camera device comprises a combustion arc capture camera and a video capture camera arranged on the top of the train. 9 . 9 . The detection system according to claim 2 , wherein the detection system further comprises a synchronous positioning device, the synchronous positioning device is configured to obtain its own positioning information and send the positioning information to the The data integration processing device. 10 . The detection system according to claim 8 , wherein the data integration processing device is preset with an image recognition algorithm, and is configured to use the image recognition algorithm to collect the camera and the video for the arc burning. 11 . The images captured by the camera are processed to identify contact failures of the catenary and the pantograph. 11. The detection system of claim 10, wherein the image recognition algorithm comprises: Capture and save the images captured by the arcing capture camera and the video capture camera by frame; The image frames formed by frame-by-frame interception are preprocessed by Gaussian filtering algorithm and image enhancement algorithm; Extract the contour information based on the preprocessed image frame; Carry out similarity calculation between the extracted contour information and the pre-stored standard image, and mark the image frame to which the similarity calculation result is less than a preset similarity threshold as an abnormal image frame; It is judged whether there are continuous abnormal image frames with the number of continuous frames exceeding the preset continuous frame threshold, and when the judgment result is yes, the pantograph-catenary operating state fault alarm is output.

Images