CN217385548U - Non-contact rail transit train speed direction mileage detection device - Google Patents
Non-contact rail transit train speed direction mileage detection device Download PDFInfo
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- CN217385548U CN217385548U CN202123398524.5U CN202123398524U CN217385548U CN 217385548 U CN217385548 U CN 217385548U CN 202123398524 U CN202123398524 U CN 202123398524U CN 217385548 U CN217385548 U CN 217385548U
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Abstract
The utility model discloses a non-contact rail transit train speed direction mileage detection device, including image acquisition unit, image data processing unit, fixing device and data communication device, the image data processing unit passes through the data communication device and is connected with the image acquisition unit; the image acquisition unit is fixedly arranged at the bottom of the rail train through a fixing device; the image acquisition unit is used for acquiring train axle speed measurement pattern rotation image data when the rail train runs at a high speed and uploading the train axle speed measurement pattern rotation image data to the image data processing unit through the data communication device; the image data processing unit is used for receiving and processing the axle rotation image data and calculating the running speed, the running direction and the running mileage of the train. The utility model discloses the suitable face is extensive, need not to walk the line part to the train axletree and reforms transform, and speed measurement accuracy is high, and speed is more timely, and is higher to the accumulative total calculation precision of mileage to can accurately detect the traffic direction of vehicle.
Description
Technical Field
The utility model relates to a rail transit technical field especially relates to a device based on machine vision realizes rail transit train functioning speed, traffic direction and operation mileage and detects.
Background
With the rapid development of urban rail transit and national electrified railways in China, the states of contact networks and rails are key factors influencing the running safety of electrified trains, so that a series of contact networks and rail detection devices installed on rail cars and operating trains are developed, and all detection devices need to acquire vehicle running speed information in real time to realize detection data positioning.
The running speed of the train is generally obtained by additionally arranging a speed sensor on an axle of the train; the operating train does not allow any change to the axle for safety, generally obtains speed information by analyzing the TCMS/MVB of the vehicle, but the refreshing frequency is slow and is generally 1 time/s, and accurate speed information cannot be provided for the detection device.
The patent application with the application number of CN201810365144.5 discloses a novel train speed and distance measuring device and a method, wherein the device comprises a high-frequency camera, an image recognition module, a logic processing module and a data interface; the high-frequency camera vertically shoots the pictures of the tracks downwards at regular intervals, and the displacement difference of adjacent pictures is calculated by utilizing the ground structure of periodic distribution between the tracks and the proportion of an actual picture object to the picture object by utilizing the image recognition module; the logic processing module calculates the running speed according to the high-frequency camera photographing frequency and the displacement difference calculated by the image recognition module, performs logic check according to the performance and the photographing period of the train, and the data interface is communicated with the vehicle-mounted equipment to output and input corresponding information. The scheme can quickly measure the speed of the train on the ground; however, the image acquisition and recognition process is susceptible to the influence of the external environment, and the error between the measurement result and the actual data is large, so that further improvement is needed.
Another example is that patent application No. CN201010510191.8 discloses a vehicle speed measuring device based on track characteristics, which includes a measuring device for sensing the change of track characteristics and collecting signals; the measuring device adjusting unit is used for adjusting the position of the measuring device and ensuring that the measuring device is in an effective measuring range; and the data acquisition and processing unit is used for receiving the signals acquired by the measuring device, and calculating the train operation parameters in real time after signal processing. The device of the scheme is based on a non-contact measuring probe, and the parameters such as the running distance, the moving speed, the acceleration and deceleration speed of the train are obtained by acquiring and processing the appearance or image characteristics such as track sleepers, fasteners and the like in real time, and the parameters are stored, communicated and displayed. Although the scheme can also realize non-contact measurement of the train speed, the train speed is obtained by processing based on the track characteristics, so the train speed measuring method is also easily influenced by the external environment, the error between the measurement result and actual data is large, and further improvement is needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art not enough, provide a non-contact track traffic train speed direction mileage detection device, through the rotation image data of the pattern that tests the speed on the image acquisition unit real-time acquisition train axletree, handle to image processing unit through giga network real-time transmission to the realization is to track traffic train operating speed, direction of operation and the quick accurate detection discernment of driving distance.
The purpose of the utility model is realized through the following technical scheme:
a non-contact rail transit train speed direction mileage detection device includes: the device comprises an image acquisition unit, an image data processing unit, a fixing device and a data communication device, wherein the image data processing unit is connected with the image acquisition unit through the data communication device; the image acquisition unit is fixedly arranged at the bottom of the rail train through a fixing device; the image acquisition unit is used for acquiring train axle speed measurement pattern rotation image data when the rail train runs at a high speed and uploading the train axle speed measurement pattern rotation image data to the image data processing unit through the data communication device; the image data processing unit is used for receiving and processing the axle rotation image data and calculating the running speed, the running direction and the running mileage of the train.
Wherein, a circle of linear triangle or trapezoid (1 or a plurality of) speed measurement patterns with the height equal to the circumference of the train axle are adhered on the train axle.
The fixing device is a C-shaped groove in the bottom of the train body and is used for fixing the image acquisition unit at the bottom of the train body.
Further, the image acquisition unit comprises a high-definition camera and a light supplement device; the high-definition camera and the light supplementing device are arranged at the bottom of the train through a C-shaped groove at the bottom of the train body; the data communication device is connected with the high-definition camera.
Furthermore, the data communication device is a gigabit router, and the high-definition camera is connected with the gigabit router through a network cable.
Furthermore, the image data processing unit is an industrial personal computer, and the model number of the industrial personal computer is ARK-3532; the industrial personal computer is connected with the gigabit router through a network cable.
The utility model has the advantages that:
1. the utility model discloses a non-contact state measurement detection device based on machine vision realizes that train functioning speed detects, only needs to walk the line part to the train axletree and reforms transform at existing interface erection equipment such as C type groove in the bottom half, has greatly guaranteed rail train operation safety.
2. The utility model discloses a device is suitable for the face extensively, applicable in the contact net detect machineshop cars such as car, contact net operation car, track detection car, track operation car to and motorcycle types such as urban rail transit operation train, big railway operation train, high-speed EMUs train.
3. The utility model discloses equipment speed measurement accuracy is high, and speed is more timely, and is higher to the accumulative total computational accuracy of mileage to can accurately detect the traffic direction of vehicle.
Drawings
Fig. 1 is a system component architecture diagram of the present invention.
Fig. 2 is a schematic diagram of the system measurement principle of the present invention.
Fig. 3 is a flow chart of the speed measuring method of the present invention.
In fig. 2: 1-high definition camera, 2-speed measurement pattern and 3-train axle.
Detailed Description
In order to understand the technical features, objects and advantages of the present invention more clearly, the following detailed description of the technical solution of the present invention is carefully chosen. It is to be understood that the embodiments described are merely exemplary of the invention, and not restrictive of the broad invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The existing method generally includes that a speed sensor is additionally arranged on a vehicle axle to acquire the running speed of a vehicle; the operating train does not allow any change to the axle in consideration of safety, generally obtains speed information by analyzing the vehicle TCMS/MVB, but the refreshing frequency is slow and is generally 1 time/s, and accurate speed information cannot be provided for the detection device. The utility model discloses to the above-mentioned condition is not enough, has designed a non-contact track traffic train speed direction mileage detection device, through utilizing current image recognition processing software discernment train axletree pattern edge, calculates train axletree turned angle and number of turns to the change volume of two frame image axletree pattern edge distances around, combines wheel diameter, time difference can calculate information such as the real-time operating speed of train, the utility model discloses the detailed design process is shown below the embodiment.
The first embodiment is as follows:
in this embodiment, as shown in fig. 1, since the axle of the rail transit train rotates synchronously with the wheels during operation, a non-contact rail transit train speed direction mileage detection apparatus is designed according to the characteristic, as shown in fig. 1, the system includes: the device comprises an image acquisition unit, an image data processing unit, a fixing device and a data communication device, wherein the image data processing unit is connected with the image acquisition unit through the data communication device; the image acquisition unit is fixedly arranged at the bottom of the rail train through a fixing device; the image acquisition unit is used for acquiring train axle speed measurement pattern rotation image data when the rail train runs at a high speed and uploading the train axle speed measurement pattern rotation image data to the image data processing unit through the data communication device; the image data processing unit is used for receiving and processing the axle rotation image data and calculating the running speed, the running direction and the running mileage of the train.
In this embodiment, a circle of linear triangular or trapezoidal (1 or more) speed measurement patterns with the height equal to the circumference of the train axle is adhered to the train axle, an image of the speed measurement patterns on the train axle is acquired by the image acquisition unit and sent to the image data processing unit for analysis by the existing image processing software, the running direction of the train, the rotation angle of the train axle and the number of turns of the train are calculated according to the difference between the recognition processing results of the two frames of images and the acquisition time difference between the two frames of images, and the running mileage and the real-time running speed of the train are calculated by combining the wheel diameters of the wheels.
The fixing device, namely the fixing interface is an existing C-shaped groove at the bottom of the train body and is used for fixing the image acquisition unit at the bottom of the train body.
Further, the image acquisition unit comprises a high-definition camera and a light supplement device; the high-definition camera and the light supplementing device are arranged at the bottom of the train through a C-shaped groove at the bottom of the train body; the data communication device is connected with the high-definition camera.
Furthermore, the data communication device is a gigabit router, and the high-definition camera is connected with the gigabit router through a network cable.
Furthermore, the image data processing unit is an industrial personal computer, and the model number of the image data processing unit is ARK-3532. The industrial personal computer is connected with the gigabit router through a network cable, the industrial personal computer can be provided with the existing image processing software for data processing, the processing flow of the existing image processing software refers to the patent application with the application number of CN201410355253.0, the application discloses a method and a device for detecting the speed and displacement of a rail train, the scheme is provided with a device for detecting the speed and displacement of the rail train, and the device comprises an image acquisition and processing module for acquiring the moving image of the ground when the train operates in real time and calculating the displacement between two adjacent frames of images; the data processing module is used for calculating the moving speed of the current ground image according to the displacement between the two adjacent frames of images calculated by the image acquisition and processing module and the interval time between the two adjacent frames of images, and obtaining the current train speed according to the functional relation between the train speed and the moving speed of the ground image; and accumulating the displacement between the two adjacent frames of images obtained by each time of calculation by the image acquisition and processing module before the current moment to obtain the current train displacement. The image processing software of the application adopts the same processing principle as the detection device in the patent application (CN 201410355253.0) to analyze and process the high-definition image of the speed measurement pattern of the application, so as to calculate the running state of the rail train.
Example two:
in the embodiment, the speed measurement pattern 2 (a black and white linear triangle or a trapezoid (1 or more) pattern) is focused on the train axle 3 through the image acquisition unit (the high-definition camera 1 and the light supplement device) installed on the train body, the high-definition camera 1 synchronously triggers the light supplement device to acquire a high-definition image during train running at a high speed, the image data processing unit (the industrial personal computer) receives, analyzes and processes axle rotation image data, the train running speed is calculated in real time, and the schematic diagram of the monitoring system is shown in fig. 2.
The detailed monitoring principle and method of the embodiment are as follows:
1. pattern of train axles: a circle of clearly black and white linear triangular or trapezoidal (1 or more) patterns is stuck (or coated) on the axle of the rail transit train.
2. An image acquisition unit: the image acquisition unit consists of a high-definition camera 1 and a light supplement device, and the high-definition camera 1 triggers the light supplement device to synchronously work and acquire images; the image acquisition unit is arranged at the bottom of the train body and focuses on train axle patterns, and acquires high-definition images formed by the patterns on the train axle in real time.
3. Image data processing unit (industrial personal computer): the acquired high-definition images of the train axles are transmitted to an image data processing host (industrial personal computer) through a gigabit network, edges on two sides of the pattern are identified by using an edge detection algorithm, and the distance between the edges on the left side and the edges on the right side is calculated.
4. Mileage, direction and speed calculation: on the basis of the steps, the rotation angle and the number of turns of the axle of the train can be calculated according to the difference value of the edge distances of the axle pattern recognized by the front frame image and the rear frame image and the time difference of the front frame image and the rear frame image, the running mileage and the real-time running speed of the train can be calculated by combining the wheel diameters of the wheels, and the running direction of the train can be obtained by the positive and negative of the difference value of the edge distances of the front frame image and the rear frame image. And providing accurate mileage positioning information for the detection device.
The present embodiment has the following technical advantages:
1. the method realizes the detection of the running speed of the train by adopting a non-contact method based on machine vision, only equipment needs to be installed on interfaces such as a C-shaped groove and the like at the bottom of the train body, and a train axle running part does not need to be modified, so that the running safety of the rail train is greatly ensured.
2. The measuring method and the measuring device have wide application range, and can be suitable for engineering vehicles such as contact network detection vehicles, contact network operation vehicles, rail detection vehicles and rail operation vehicles, and vehicle types such as urban rail transit operation trains, large railway operation trains and high-speed motor train unit trains.
3. The non-contact speed measurement method realized by the embodiment has the advantages of high acquisition frequency, namely high speed measurement precision, timely speed updating, higher accumulated calculation precision of mileage and capability of accurately detecting the running direction of the vehicle.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a non-contact rail transit train speed direction mileage detection device which characterized in that includes: the image acquisition unit, the image data processing unit, the fixing device and the data communication device, wherein the image data processing unit is connected with the image acquisition unit through the data communication device; the image acquisition unit is fixedly arranged at the bottom of the rail train body through a fixing device; the image acquisition unit is used for acquiring the rotating image data of the train axle when the rail train runs at a high speed and uploading the rotating image data to the image data processing unit through the data communication device; the image data processing unit is used for receiving and processing the axle rotation image data and calculating the running speed, the running direction and the running mileage of the train.
2. The non-contact type rail transit train speed direction mileage detection device of claim 1, wherein a circle of linear triangle or trapezoid speed measurement pattern with the same height as the train axle circumference is pasted on the train axle.
3. The non-contact type rail transit train speed and direction mileage detection device according to claim 1, wherein the fixing device is a C-shaped groove existing at the bottom of the train body.
4. The non-contact rail transit train speed and direction mileage detection device according to claim 1, wherein the image acquisition unit comprises a high definition camera and a light supplement device; the high-definition camera and the light supplementing device are arranged at the bottom of the train through a C-shaped groove at the bottom of the train body; the data communication device is connected with the high-definition camera.
5. The non-contact rail transit train speed and direction mileage detection device of claim 1, wherein the data communication device is a gigabit router, and the high definition camera is connected with the gigabit router through a network cable.
6. The non-contact type rail transit train speed and direction mileage detection device according to claim 1, wherein the image data processing unit is an industrial personal computer, and the model number of the industrial personal computer is ARK-3532; the industrial personal computer is connected with the gigabit router through a network cable.
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| CN202123398524.5U CN217385548U (en) | 2021-12-31 | 2021-12-31 | Non-contact rail transit train speed direction mileage detection device |
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| CN202123398524.5U CN217385548U (en) | 2021-12-31 | 2021-12-31 | Non-contact rail transit train speed direction mileage detection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114509089A (en) * | 2021-12-31 | 2022-05-17 | 成都弓网科技有限责任公司 | Non-contact rail transit train speed direction mileage detection method and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114509089A (en) * | 2021-12-31 | 2022-05-17 | 成都弓网科技有限责任公司 | Non-contact rail transit train speed direction mileage detection method and system |
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