Automatic speed limiting and alarming system for electronic tag of rail electric locomotive

Abstract

The utility model relates to the technical field of rail electric locomotives, in particular to a rail electric locomotive electronic tag automatic speed limiting and alarming system which comprises a radio frequency sensor unit, a control unit, an electronic tag unit and a braking unit, and the radio frequency sensor unit, the control unit and the braking unit are arranged on an electric locomotive body. The electronic tag unit is arranged in a tunnel, and the control unit communicates with the radio frequency sensor unit, the electronic tag unit and the braking unit at the same time; the radio frequency sensor unit is used for transmitting multi-band radio frequency signals, measuring and calculating the speed of the electric locomotive in real time and generating radio frequency sensor speed data; the electronic tag unit is used for storing data and issuing speed limit data; the control unit analyzes and processes the speed data of the radio frequency sensor and the speed limit data issued by the electronic tag unit to generate speed control information; and the brake unit receives the speed control information to control the speed of the rail electric locomotive. According to the invention, the speed control of the rail electric locomotive is realized.

Description

Technical Field

[0001] This application relates to the technical field of electric railcars, and in particular to an electronic tag-based automatic speed limiting and alarm system for electric railcars. Background Technology

[0002] With the rapid development of society and cities, underground rail transit has become an important way to alleviate urban traffic pressure. In the shield tunneling construction of underground rail transit, whether the locomotive can operate efficiently and safely has always been an important factor affecting the efficiency and safety of shield tunneling construction.

[0003] Due to the characteristics of long tunnels, steep gradients, and heavy transport locomotives, the speed of vehicles is often relatively high, which puts a strain on the braking system. Currently, most projects still rely on manual speed control. When the speed is too high, the driver may not be able to react and brake in time, thereby increasing the risk of collision or derailment. Furthermore, long hours and high-intensity driving can easily lead to driver fatigue, which in turn affects their judgment and reaction speed. Fatigue driving will significantly reduce the accuracy of speed control and increase the possibility of accidents. Summary of the Invention

[0004] To achieve effective speed control of trams, this application provides an electronic tag-based automatic speed limiting and alarm system for trams, including a radio frequency (RF) sensor unit, a control unit, an electronic tag unit, and a braking unit. The RF sensor unit, control unit, and braking unit are all installed on the tram's body, while the electronic tag unit is installed inside a tunnel. The control unit communicates with the RF sensor unit, electronic tag unit, and braking unit simultaneously. The RF sensor unit transmits multi-band RF signals to measure the tram's speed in real time, generating RF sensor speed data. The electronic tag unit stores data and transmits speed limit data. The control unit receives the RF sensor speed data and the speed limit data transmitted by the electronic tag unit, and performs data analysis and processing on the RF sensor speed data and the speed limit data transmitted by the electronic tag unit to generate speed control information. The braking unit receives the speed control information to control the speed of the tram.

[0005] By adopting the above technical solution, by setting up a radio frequency sensor unit, a control unit, and a braking unit on the locomotive, and setting up an electronic tag unit in the tunnel, when the locomotive passes the position of the electronic tag unit, the control unit collects the speed data and speed limit data of the radio frequency sensor and compares the speed data and speed limit data. If the locomotive exceeds the speed limit when passing the position of the electronic tag unit, the control unit and the braking unit can realize automatic control of the vehicle.

[0006] Optionally, the electronic tag unit includes a dual-tag module, which adopts an RFID tag + NFC tag mode.

[0007] By adopting the above technical solution, RFID tags are used for low-speed accurate positioning and to store the current section speed limit value; when the RFID tag fails, the NFC tag sends a backup speed limit command to the locomotive through 13.56MHz NFC near-field communication to realize the switching of primary and backup communication; and it supports mobile phone NFC to read tag information (such as speed limit rules and maintenance records), which is convenient for maintenance personnel to debug on site.

[0008] Optionally, the radio frequency sensor unit adopts a dual-band radio frequency sensor of 2.4GHz (anti-interference) and 868MHz (long distance), and the control unit has a built-in TOF algorithm.

[0009] By adopting the above technical solution, using a dual-sensor mode, and combining the Doppler effect with the TOF algorithm, dynamic vehicle speed measurement can be achieved.

[0010] Optionally, the radio frequency sensor unit is configured as two sets, one set at the front of the vehicle and the other set at the rear of the vehicle; the control unit has a built-in Kalman filter fusion algorithm.

[0011] By adopting the above technical solutions, wheel-rail slippage errors can be eliminated, generating data that is more consistent with actual vehicle speeds. Attached Figure Description

[0012] Figure 1 This is a structural diagram of an electronic tag-based automatic speed limiting and alarm system for railcars, as described in this application.

[0013] Figure 2 This is a flowchart illustrating the logic of a railcar electronic tag automatic speed limiting and alarm system that sends out speed control information.

[0014] Explanation of reference numerals in the attached figures:

[0015] 1. Radio frequency sensor unit; 2. Control unit; 3. Electronic tag unit; 4. Braking unit; 5. Warning unit. Detailed Implementation

[0016] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0017] It should be understood that the terms "comprising" and "including" used in the specification and claims of this application indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0018] refer to Figure 1 In this embodiment, an electronic tag automatic speed limiting and alarm system for a railcar includes a radio frequency sensor unit 1, a control unit 2, an electronic tag unit 3, and a braking unit 4; wherein, the radio frequency sensor unit 1, the control unit 2, and the braking unit 4 are all installed on the railcar body, and the electronic tag units 3 are evenly installed in the tunnel at intervals.

[0019] Specifically, the radio frequency sensor unit 1 communicates with the control unit 2, the braking unit 4 communicates with the control unit 2, and the control unit 2 communicates with the electronic tag unit 3. The radio frequency sensor unit 1 transmits multi-band radio frequency signals to measure the locomotive speed in real time and generate radio frequency sensor speed data. The electronic tag unit 3 stores data and sends speed limit data. The control unit 2 receives the radio frequency sensor speed data and the speed limit data sent by the electronic tag unit 3, and performs data analysis and processing on the radio frequency sensor speed data and the speed limit data sent by the electronic tag unit 3 to generate speed control information. The braking unit 4 receives the speed control information to achieve automatic control of the speed of the rail locomotive.

[0020] In this embodiment, the RF sensor unit 1 and the control unit 2 transmit speed measurement data and status information via a CAN bus to achieve low-latency communication; the braking unit 4 and the control unit 2 transmit speed control information via a CAN bus; the control unit 2 and the electronic tag unit 3 transmit data non-contactly via RF signals to the tag; different electronic tag units 3 are installed every 300 rings in the tunnel section; the braking unit 4 can be implemented through a hydraulic braking + regenerative braking composite system, and communicates with the control unit 2 via PWM voltage regulation and CAN bus.

[0021] refer to Figure 2 The electronic tag unit 3 includes a location coordinate module, a speed limit parameter module, and a dual-tag module. The coordinate module has built-in geographic coordinate data for the control unit 2 to read. The speed limit parameter module is used to store basic speed limit values. The dual-tag module adopts an RFID tag + NFC tag mode. The RFID tag is used for low-speed accurate positioning and stores the current section speed limit value. When the RFID tag fails, the NFC tag sends a backup speed limit command to the locomotive through 13.56MHz NFC near-field communication to realize the switching of primary and backup communication. It also supports mobile phone NFC to read tag information (such as speed limit rules and maintenance records), which is convenient for maintenance personnel to debug on site.

[0022] Specifically, the radio frequency sensor unit 1 is a dual-band radio frequency sensor with a frequency of 2.4GHz (anti-interference) and 868MHz (long distance). The control unit 2 has a built-in TOF algorithm. By adopting a dual-sensor mode and combining the Doppler effect with the TOF algorithm, the vehicle speed can be dynamically calculated.

[0023] In this embodiment of the application, the basic speed limit can be determined in advance based on safety standards and track curves, etc.

[0024] To reduce the inaccurate speed information caused by Gaussian white noise and systematic deviations due to idling in the dual-band RF sensor, the RF sensor unit 1 is configured with two sets: one set at the front of the vehicle to collect the speed of the front wheels, and the other set at the rear of the vehicle to collect the speed of the rear wheelsets. The control unit 2 has a built-in Kalman filter fusion algorithm, which can eliminate wheel-rail slippage error and generate data that is more consistent with the actual vehicle speed.

[0025] To prevent the automatic speed limiting system from malfunctioning, this application's electronic tag-based automatic speed limiting and alarm system for railcars also includes a warning unit. When the railcar exceeds the set speed, it will emit an audible warning or flash a warning light to remind the driver to slow down. This alarm function can increase the driver's attention and prevent fatigue driving or inattention to speed.

[0026] Specifically, an electronic tag-based automatic speed limiting and alarm system for railcars also includes a warning unit, which comprises a laser projection module and a directional speaker array. The laser projection module communicates with the control unit 2, receives speed information transmitted by the control unit 2, and projects the speed information onto the windshield in the form of a laser light screen. The directional speaker array also communicates with the control unit 2, receives the speed information transmitted by the control unit 2, and focuses the alarm sound towards the driver's ear.

[0027] Implementation principle: By integrating the radio frequency sensor unit 1, control unit 2, electronic tag unit 3, and braking unit 4, speed control is achieved during the operation of the electric locomotive, improving safety during transportation. By setting up a laser projection module and a directional speaker array, the system should be able to issue an alarm signal when the vehicle speed approaches or exceeds the safety limit, reminding the driver to take appropriate measures.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A rail motor vehicle electronic tag automatic speed limiting and alarm system, characterised in that, Including radio frequency sensor unit (1), control unit (2), electronic tag unit (3) and brake unit (4), the radio frequency sensor unit (1), control unit (2) and brake unit (4) are all arranged in the motor car body, the electronic tag unit (3) is arranged in the tunnel, the control unit (2) is communicated with radio frequency sensor unit (1), electronic tag unit (3) and brake unit (4) simultaneously;The radio frequency sensor unit (1) is used to emit multi-band radio frequency signal, and the speed of motor car is measured in real time, and radio frequency sensor speed data is generated;The electronic tag unit (3) is used for data storage and the issue of speed limit data;The control unit (2) is used for receiving radio frequency sensor speed data and the speed limit data issued by electronic tag unit (3), and the radio frequency sensor speed data and the speed limit data issued by electronic tag unit (3) are analyzed and processed, and speed control information is generated;The brake unit (4) receives speed control information, realizes the control to the speed of rail motor car.

2. The electronic tag automatic speed limiting and alarming system for rail motor cars according to claim 1, characterized in that, The electronic tag unit (3) includes double label module, and the double label module adopts RFID label+NFC label mode.

3. The electronic tag automatic speed limiting and alarming system for rail motor cars according to claim 2, characterized in that, The radio frequency sensor unit (1) adopts 2.4GHz and 868MHz dual-band radio frequency sensor, and the control unit (2) is built-in TOF algorithm.

4. The electronic tag automatic speed limiting and alarming system for rail motor cars according to claim 3, characterized in that, The radio frequency sensor unit (1) is arranged as two groups, one group is arranged at the car head, and the other group is arranged at the car tail;The control unit (2) is built-in Kalman filter fusion algorithm. The radio frequency sensor unit (1) is arranged as two groups, one group is arranged at the car head, and the other group is arranged at the car tail;The control unit (2) is built-in Kalman filter fusion algorithm.

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