Vehicle electric pneumatic control device and method based on power line carrier communication

Abstract

The invention belongs to the technical field of vehicle electric pneumatic control devices, and particularly relates to a vehicle electric pneumatic control device and method based on power line carrier communication. The vehicle electric pneumatic control device comprises a power source isolation conversion module connected with a voltage port, the power source isolation conversion module is connected with a power line carrier communication module and a CPU control module, and the power line carrier communication module is connected with the CPU control module; the CPU control module is further connected with an AD conversion module and an electromagnetic valve control module, the AD conversion module is connected with a sensor signal conditioning module, and the train pipe pressure sensor, the brake cylinder pressure sensor and the pre-control chamber pressure sensor are all connected with the sensor signal conditioning module. And the braking electromagnetic valve, the relieving electromagnetic valve and the slowing electromagnetic valve are all connected with the electromagnetic valve control module. The invention provides a vehicle electric pneumatic control device and method based on power line carrier communication.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle electro-pneumatic control devices, and in particular relates to a vehicle electro-pneumatic control device and method based on power carrier communication. Background Art

[0002] The braking and release control method of heavy-loaded freight cars is the main factor affecting the tonnage of freight trains. The increase in train tonnage will lead to a longer braking distance and an unstable braking and release process, thus threatening the driving safety of heavy-loaded freight trains.

[0003] At present, the main braking relief method for heavy-duty freight trains in China is air braking. Air braking relief transmits braking signals through air waves, and its speed is about 2 / 3 of the speed of sound. The braking relief time increases significantly with the increase of train length. In the process of braking relief, since the air wave transmission takes time, the braking relief time of each vehicle in the formation is inconsistent, resulting in longitudinal impulses between vehicles. This impulse will seriously affect driving safety and restrict the driving speed and carrying capacity of freight trains. Therefore, this method is mainly used for low-speed and light-loaded freight trains, and is also the main braking relief method for freight cars within 20,000 tons in my country. In foreign heavy-duty freight, there is an electric control braking relief method, that is, installing cables on the entire train, transmitting power and control signals to each vehicle through the cables, and transmitting braking relief signals through the network transceiver mounted on the bus cable. Compared with air braking relief, this method can significantly reduce the braking relief time, improve the synchronization of braking relief, reduce the impulse between vehicles, and increase the heavy load. However, due to the braking relief principle and technical barriers, this foreign electric control braking relief method cannot be applied in China.

[0004] In order to improve the heavy-load transport capacity of my country's heavy-load freight trains, whether increasing the axle weight or increasing the marshaling, higher requirements are placed on the synchronous performance of the train's brake relief. Therefore, in order to improve the synchronization of heavy-load truck vehicle brake relief and reduce the impact between vehicles caused by the slow transmission of air brake relief waves, it is of great significance to develop a vehicle electro-pneumatic control device based on power carrier communication. Summary of the invention

[0005] In order to solve the above-mentioned problems existing in the prior art, the purpose of the present invention is to provide a vehicle electro-pneumatic control device and method based on power carrier communication, which adopts simultaneous electric and air control to realize truck braking and relief, solves the problem of air control asynchrony and the problem of being unable to control when the electric control device fails, and ensures safe control of truck braking and relief.

[0006] The technical solution adopted by the present invention is:

[0007] A vehicle electro-pneumatic control device based on power carrier communication, including a power isolation conversion module connected to a voltage port, the power isolation conversion module is connected to a power carrier communication module and a CPU control module, the power carrier communication module is connected to the CPU control module; the CPU control module is also connected to an AD conversion module and a solenoid valve control module, the AD conversion module is connected to a sensor signal conditioning module, a train pipe pressure sensor, a brake cylinder pressure sensor and a pre-control room pressure sensor are all connected to the sensor signal conditioning module, and a brake solenoid valve, a relief solenoid valve and an acceleration and deceleration solenoid valve are all connected to the solenoid valve control module.

[0008] As a preferred solution of the present invention, the power isolation conversion module stabilizes and isolates the power supply voltage on the train power bus, converts it into the voltage required by the system to power the device, and has surge resistance design and electromagnetic compatibility design;

[0009] The power carrier communication module converts the digital signal into a frequency signal, loads it onto the power supply voltage, and transmits it to the vehicle to be controlled via a cable.

[0010] The AD conversion module uses the A / D conversion chip to collect data from sensors installed on the vehicle and convert analog signals into digital signals;

[0011] The sensor signal conditioning module performs I / V conversion, filtering, and amplification on the sensor's current signal, and converts the sensor's signal into the voltage signal required by the A / D chip;

[0012] The CPU control module coordinates and manages the entire system and completes the functions of the entire system;

[0013] The solenoid valve control module responds to the braking and releasing commands of the CPU control module, controls the solenoid valve, and completes the braking and releasing process.

[0014] As a preferred solution of the present invention, the CPU control module is also connected to a Beidou positioning module, and the Beidou positioning module is connected to a Beidou antenna; the Beidou positioning module determines the vehicle position and performs vehicle grouping and sorting.

[0015] As a preferred solution of the present invention, the power isolation conversion module includes a protection module and a power module that are connected to each other, the protection module is connected to the voltage port, the protection module is connected to the power carrier communication module, and the power module is connected to the CPU control module; the protection module stabilizes and isolates the power supply voltage on the train power bus, and the protection module has an anti-surge design and an electromagnetic compatibility design; the power module converts the stabilized and isolated power supply voltage of the protection module into the voltage required by the system to power the device.

[0016] As a preferred solution of the present invention, the CPU control module is also connected to a data storage module, which is connected to the debugging data download port; the data storage module completes the storage function of the system collected data and saves the collected data on site.

[0017] As a preferred solution of the present invention, the CPU control module is also connected to a system clock module; the system clock module completes the timing processing of the system.

[0018] As a preferred solution of the present invention, the power carrier communication module has a bidirectional conversion function, receives control information sent from the locomotive control device on the train power bus to the vehicle device, and feeds back status information of the vehicle device to the locomotive device.

[0019] A vehicle electric-pneumatic control method based on power carrier communication comprises the following steps:

[0020] Power on: The system is initialized, the vehicle control parameters and basic sensor parameters are read, the sensor self-check is performed, the current time and position are obtained through the Beidou system to facilitate the subsequent marshaling position sorting, and the device joining status is determined through the control parameters;

[0021] Cut-off state mode: In the cut-off state, the device can perform relevant configuration operations such as setting vehicle basic parameters and braking parameters, reading storage data, and upgrading system software, but cannot perform braking and relief control;

[0022] In the working mode of the put-in state:

[0023] In the command receiving and processing stage, the command data is received and fed back through the power carrier communication module, and the data is transmitted to the CPU control module through the serial port, and the state control is performed by parsing different control commands;

[0024] During the braking / relieving execution phase, after receiving the braking and relieving command information, braking and relieving processing is performed, and the vehicle's braking and relieving control is achieved by controlling the solenoid valve, and the vehicle's braking and relieving stability control is achieved by adjusting the braking and relieving speed.

[0025] The beneficial effects of the present invention are:

[0026] 1. This announcement has a dual control mode of electric control and pneumatic control. Electric control belongs to command control, which can realize synchronous control of different vehicles; pneumatic control belongs to physical control. When the electric control fails, it can ensure that the vehicle's braking control does not fail, ensuring the safe operation of the train. The present invention adopts the method of simultaneous electric and air control to realize the braking and relief of the truck, solving the problem of asynchronous air control and the problem of being unable to control when the electric control device fails, ensuring the safe control of the truck's braking relief.

[0027] 2. The present invention uses power carrier communication based on FSK modulation technology to receive and feedback braking control commands, which can accurately receive and process control commands sent by the locomotive, avoid duplicate wiring problems, and ensure system reliability and stability.

[0028] 3. The present invention adopts a high-precision 16-bit digital conversion A / D chip and a gas path sensing system, which can achieve a pressure control accuracy of 0.1KPa. The present invention adopts adjustable multi-stage braking and relief, which can effectively adjust the braking / relieving speed in stages to achieve a precise control effect.

[0029] 4. The present invention has the function of storing process data, achieving a data-free breakthrough in the truck system. The data can be used for braking mechanism research, giving the truck a "black box" function.

[0030] 5. The present invention realizes intelligent and autonomous management of vehicle formation through the Beidou positioning module. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of the device of the present invention;

[0032] Figure 2 It is a flow chart of the method of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0035] like Figure 1As shown, the vehicle electro-pneumatic control device based on power carrier communication of this embodiment includes a power isolation conversion module connected to the voltage port, the power isolation conversion module is connected to the power carrier communication module and the CPU control module, the power carrier communication module and the CPU control module are connected; the CPU control module is also connected to the AD conversion module and the solenoid valve control module, the AD conversion module is connected to the sensor signal conditioning module, the train pipe pressure sensor, the brake cylinder pressure sensor and the pre-control room pressure sensor are all connected to the sensor signal conditioning module, the brake solenoid valve, the relief solenoid valve and the acceleration and deceleration solenoid valve are all connected to the solenoid valve control module; the CPU control module is also connected to the Beidou positioning module, the data storage module and the system clock module.

[0036] Among them, the main function of the power isolation conversion module is to stabilize and isolate the power supply voltage (DC 110V) on the train power bus, and convert it into the voltage required by the system to power the device. It also has surge protection design and electromagnetic compatibility design to meet the electromagnetic compatibility performance of the system.

[0037] The power isolation conversion module includes a protection module and a power module that are connected to each other. The protection module is connected to the voltage port, the protection module is connected to the power carrier communication module, and the power module is connected to the CPU control module. The protection module stabilizes and isolates the power supply voltage on the train power bus. The protection module has an anti-surge design and an electromagnetic compatibility design; the power module converts the stabilized and isolated power supply voltage of the protection module into the voltage required by the system to power the device.

[0038] The power carrier communication module is based on the FSK modulation technology with an operating frequency of 120~135KHZ. It converts digital signals into frequency signals, loads them onto the power supply voltage, and transmits them to the vehicle to be controlled through cables. The carrier module has a bidirectional conversion function, that is, the TTL serial port of the MCU and the carrier signal are converted to each other, that is, it is used to receive control information sent from the locomotive control device on the train power bus to the vehicle device, and at the same time feed back the status information of the vehicle device to the locomotive device, so as to realize the system's electrical and pneumatic control management.

[0039] The AD conversion module uses a 16-bit A / D conversion chip to collect data from sensors installed on the vehicle and convert analog signals into digital signals.

[0040] The sensor signal conditioning module realizes I / V conversion, filtering, and amplification of the sensor's current signal, and converts the sensor's signal into the voltage signal required by the A / D chip.

[0041] The CPU control module is mainly used for coordinating and managing the entire system and completing the functions of the entire system.

[0042] The solenoid valve control module responds to the braking and releasing commands of the control processing module, controls the solenoid valve, and completes the braking and releasing process.

[0043] The data storage module completes the storage function of the system's collected data and saves the collected data on site. The system clock module completes the system's timing processing, especially the timing during data storage.

[0044] The data reading module uses an external SD card to read data, and transfers and reads the data in the storage module.

[0045] The Beidou positioning module determines the vehicle position, which is used for vehicle grouping and sorting, and realizes autonomous sorting of any vehicle.

[0046] like Figure 2 As shown, the vehicle electric-pneumatic control method based on power carrier communication of this embodiment includes the following steps:

[0047] Power on: The system is initialized, the vehicle control parameters and basic sensor parameters are read, the sensor self-check is performed, the current time and position are obtained through the Beidou system to facilitate the subsequent marshaling position sorting, and the status of the device joining is determined by the control parameters.

[0048] Cut-off state mode: In the cut-off state, the device can perform related configuration operations such as setting vehicle basic parameters and braking parameters, reading storage data, and upgrading system software, but cannot perform braking and relief control.

[0049] In the working mode of the put-in state:

[0050] In the command receiving and processing stage, the command data is received and fed back through the power carrier communication module, and the data is transmitted to the CPU control module through the serial port, and the state control is performed by parsing different control commands;

[0051] During the braking / relieving execution phase, after receiving the braking and relieving command information, braking and relieving processing is performed, and the vehicle's braking and relieving control is achieved by controlling the solenoid valve, and the vehicle's braking and relieving stability control is achieved by adjusting the braking and relieving speed.

[0052] The present invention is not limited to the above-mentioned optional implementation modes. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the protection scope of the present invention.

Claims

1. A vehicle electric and pneumatic control device based on power carrier communication, characterized in that: It includes a power isolation conversion module connected to the voltage port, the power isolation conversion module is connected to the power carrier communication module and the CPU control module, the power carrier communication module is connected to the CPU control module; the CPU control module is also connected to the AD conversion module and the solenoid valve control module, the AD conversion module is connected to the sensor signal conditioning module, the train pipe pressure sensor, the brake cylinder pressure sensor and the pre-control room pressure sensor are all connected to the sensor signal conditioning module, and the brake solenoid valve, the relief solenoid valve and the acceleration and deceleration solenoid valve are all connected to the solenoid valve control module.

2. A vehicle electro-pneumatic control device based on power carrier communication according to claim 1, characterized in that: The power isolation conversion module stabilizes and isolates the power supply voltage on the train power bus, converts it into the voltage required by the system to power the device, and has surge resistance and electromagnetic compatibility design; The power carrier communication module converts the digital signal into a frequency signal, loads it onto the power supply voltage, and transmits it to the vehicle to be controlled via a cable. The AD conversion module uses the A / D conversion chip to collect data from sensors installed on the vehicle and convert analog signals into digital signals; The sensor signal conditioning module performs I / V conversion, filtering, and amplification on the sensor's current signal, and converts the sensor's signal into the voltage signal required by the A / D chip; The CPU control module coordinates and manages the entire system and completes the functions of the entire system; The solenoid valve control module responds to the braking and releasing commands of the CPU control module, controls the solenoid valve, and completes the braking and releasing process.

3. A vehicle electro-pneumatic control device based on power line carrier communication according to claim 2, characterized in that: The CPU control module is also connected to a Beidou positioning module, which is connected to a Beidou antenna; the Beidou positioning module determines the vehicle position and performs vehicle grouping and sorting.

4. A vehicle electro-pneumatic control device based on power line carrier communication according to claim 2, characterized in that: The power isolation conversion module includes a protection module and a power module connected to each other, the protection module is connected to the voltage port, the protection module is connected to the power carrier communication module, and the power module is connected to the CPU control module; the protection module stabilizes and isolates the power supply voltage on the train power bus, and the protection module has an anti-surge design and an electromagnetic compatibility design; The power module converts the power supply voltage stabilized and isolated by the protection module into the voltage required by the system to power the device.

5. The vehicle electro-pneumatic control device based on power carrier communication according to claim 2, characterized in that: The CPU control module is also connected to a data storage module, which is connected to the debugging data download port; the data storage module completes the storage function of the system collected data and saves the collected data on site.

6. A vehicle electro-pneumatic control device based on power line carrier communication according to claim 2, characterized in that: The CPU control module is also connected to a system clock module; the system clock module completes the timing processing of the system.

7. A vehicle electro-pneumatic control device based on power line carrier communication according to claim 2, characterized in that: The power carrier communication module has a bidirectional conversion function, receives control information sent from the locomotive control device on the train power bus to the vehicle device, and feeds back status information of the vehicle device to the locomotive device.

8. A vehicle electro-pneumatic control method based on power carrier communication, using the vehicle electro-pneumatic control device based on power carrier communication according to claim 2, characterized in that: The following steps are involved: Power on: The system is initialized, the vehicle control parameters and basic sensor parameters are read, the sensor self-check is performed, the current time and position are obtained through the Beidou system to facilitate the subsequent marshaling position sorting, and the device joining status is determined through the control parameters; Cut-off state mode: In the cut-off state, the device can perform relevant configuration operations such as setting vehicle basic parameters and braking parameters, reading storage data, and upgrading system software, but cannot perform braking and relief control; In the working mode of the put-in state: In the command receiving and processing stage, the command data is received and fed back through the power carrier communication module, and the data is transmitted to the CPU control module through the serial port, and the state control is performed by parsing different control commands; During the braking / relieving execution phase, after receiving the braking and relieving command information, braking and relieving processing is performed, and the vehicle's braking and relieving control is achieved by controlling the solenoid valve, and the vehicle's braking and relieving stability control is achieved by adjusting the braking and relieving speed.

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