CN218907222U - Train traction control system - Google Patents
Train traction control system Download PDFInfo
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- CN218907222U CN218907222U CN202222736703.3U CN202222736703U CN218907222U CN 218907222 U CN218907222 U CN 218907222U CN 202222736703 U CN202222736703 U CN 202222736703U CN 218907222 U CN218907222 U CN 218907222U
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Abstract
The present specification provides a train traction control system comprising at least: the device comprises a main control unit, an auxiliary control unit and a data acquisition control unit; the auxiliary control unit is connected with the data acquisition control unit; the main control unit is connected with the auxiliary control unit through an external memory interface and an I/O interface; the auxiliary control unit is connected with the first traction system and the second traction system through the peripheral component interconnect bus; the main control unit comprises a main control processor; the auxiliary control unit comprises a programmable device and a first nonvolatile memory; the programmable device includes a dual-port random access memory; the data acquisition control unit comprises an analog input module, an analog output module, a digital input module and a digital output module. The train traction control system provided by the scheme can solve the problems of lower control precision and higher development difficulty in the prior art, can improve the speed of data processing and improves the precision of train traction control.
Description
Technical Field
The specification belongs to the field of integrated circuit design, and particularly relates to a train traction control system.
Background
The traction control system of the train is a brain of an electric traction system of a subway vehicle and a motor train unit, and is a core device of an alternating current transmission technology. In the prior art, most of train traction control systems adopt a single chip structure, and the technical problems of lower control precision, higher development difficulty and the like of the train traction control systems often exist.
In view of the above technical problems, no effective solution has been proposed at present.
Disclosure of Invention
The specification provides a train traction control system, which can solve the technical problems of lower control precision, higher development difficulty and the like of the train traction control system in the prior art.
An object of an embodiment of the present specification is to provide a train traction control system, which includes at least a main control unit, an auxiliary control unit, and a data acquisition control unit; wherein the main control unit is connected with the auxiliary control unit; the auxiliary control unit is connected with the data acquisition control unit; the auxiliary control unit comprises a programmable device and a first nonvolatile memory; wherein the programmable device may include a dual-port random access memory; the data acquisition control unit is used for transmitting the acquired first digital quantity data and second digital quantity data to the auxiliary control unit; the programmable device is used for processing the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data; the first target digital quantity data and the second target digital quantity data are sent to a dual-port random access memory for storage; the first nonvolatile memory is used for storing programs of the programmable device; the main control unit comprises a main control processor; wherein the main control processor may comprise a digital signal processor; the main control unit is used for acquiring the first target digital quantity data and the second target digital quantity data from the dual-port random access memory, and carrying out traction control on the train according to the first target digital quantity data and the second target digital quantity data.
Further, in another embodiment of the system, the train traction control system is connected to the first traction system and the second traction system respectively through a peripheral component interconnect bus; the peripheral component interconnection bus is used for carrying out data interaction with the first traction system and the second traction system.
Further, in another embodiment of the system, the train traction control system further includes a power supply unit, where the power supply unit is respectively connected with the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system, and is used for supplying power to the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system.
Further, in another embodiment of the system, the train traction control system further comprises a storage unit for storing train operation data.
Further, in another embodiment of the system, the storage unit is connected to a main control unit in a train traction control system via an external memory interface.
Further, in another embodiment of the system, the storage unit includes a second nonvolatile memory, a static random access memory; the second nonvolatile memory may be a NOR Flash nonvolatile memory and/or a NAND Flash nonvolatile memory.
Further, in another embodiment of the system, the train traction control system further includes a communication unit, which is connected to the main control unit in the train traction control system, for communication between the train traction system and the first traction system and the second traction system.
Further, in another embodiment of the system, the communication unit includes a serial communication module, an ethernet communication module.
Further, in another embodiment of the system, the primary control unit and the secondary control unit are connected via an external memory interface and an I/O interface.
Further, in another embodiment of the system, the data acquisition control unit includes an analog input module, an analog output module, a digital input module, and a digital output module; the analog input module is used for acquiring analog quantity and performing analog-to-digital conversion on the acquired analog quantity to obtain first digital quantity data; the analog output module is used for outputting the analog quantity to the first traction system and/or the second traction system so as to monitor the system; the digital input module is used for acquiring digital quantity and preprocessing the acquired digital quantity to obtain second digital quantity data; the digital output module is used for outputting the second digital quantity data to the first traction system and/or the second traction system so as to carry out system test.
The train traction control system at least comprises a main control unit, an auxiliary control unit and a data acquisition control unit; wherein the main control unit is connected with the auxiliary control unit; the auxiliary control unit is connected with the data acquisition control unit; the auxiliary control unit comprises a programmable device and a first nonvolatile memory; wherein the programmable device may include a dual-port random access memory; the data acquisition control unit is used for transmitting the acquired first digital quantity data and second digital quantity data to the auxiliary control unit; the programmable device is used for processing the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data; the first target digital quantity data and the second target digital quantity data are sent to a dual-port random access memory for storage; the first nonvolatile memory is used for storing programs of the programmable device; the main control unit comprises a main control processor; wherein the main control processor may comprise a digital signal processor; the main control unit is used for acquiring the first target digital quantity data and the second target digital quantity data from the dual-port random access memory, and carrying out traction control on the train according to the first target digital quantity data and the second target digital quantity data.
The train traction control system can also comprise a power supply unit, a communication unit and a storage unit; the power supply unit is respectively connected with the main control unit, the auxiliary control unit and the data acquisition control unit in the train traction control system and is used for supplying power to the main control unit, the auxiliary control unit and the data acquisition control unit in the train traction control system; the storage unit comprises a second nonvolatile memory and a static random access memory, and is connected with a main control unit in the train traction control system through an external memory interface; the communication unit is connected with a main control unit in the train traction control system and is used for communicating the train traction system with the first traction system and the second traction system.
Drawings
In order to more clearly illustrate the embodiments of the present disclosure, the drawings that are required for the embodiments will be briefly described below, and the drawings described below are only some embodiments described in the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
FIG. 1 is a schematic diagram of one embodiment of a train traction control system provided herein;
FIG. 2 is a schematic illustration of an external memory interface provided herein;
fig. 3 is a schematic diagram of another embodiment of a train traction control system provided in the present specification.
Detailed Description
In order to make the technical solutions in the present specification better understood by those skilled in the art, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is obvious that the described embodiments are only some embodiments of the present specification, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
Considering that the train traction control system in the prior art mostly adopts a single chip structure, such as a Digital Signal Processor (DSP) and a Field Programmable Gate Array (FPGA). Digital signal processors are difficult to develop, but their performance is poor. The field programmable gate array has strong parallel data processing capability, but has high development difficulty, and is not beneficial to actual popularization and application.
In view of the above-mentioned problems and specific reasons for the problems of the existing train traction control systems, the present application contemplates providing a train traction control system that employs two chip structures.
Based on the above-mentioned idea, the present disclosure proposes an embodiment of a train traction control system, and referring to fig. 1, the train traction control system at least includes a main control unit, an auxiliary control unit, and a data acquisition control unit; wherein the main control unit is connected with the auxiliary control unit; the auxiliary control unit is connected with the data acquisition control unit; the auxiliary control unit comprises a programmable device and a first nonvolatile memory; wherein the programmable device may include a dual-port random access memory; the data acquisition control unit is used for transmitting the acquired first digital quantity data and second digital quantity data to the auxiliary control unit; the programmable device is used for processing the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data; the first target digital quantity data and the second target digital quantity data are sent to a dual-port random access memory for storage; the first nonvolatile memory is used for storing programs of the programmable device; the main control unit comprises a main control processor, wherein the main control processor can comprise a digital signal processor; the main control unit is used for acquiring the first target digital quantity data and the second target digital quantity data from the dual-port random access memory, and carrying out traction control on the train according to the first target digital quantity data and the second target digital quantity data.
In some embodiments, optionally, the main control processor may further include an ARM processor; the programmable devices described above may also include Complex Programmable Logic Devices (CPLDs) and/or Field Programmable Gate Arrays (FPGAs).
In some embodiments, the programmable device is configured to process the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data, and when implemented, the programmable device includes: the programmable device performs digital filtering on the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data.
In some embodiments, the first nonvolatile memory may be a nonvolatile memory having a Serial Peripheral Interface (SPI); the first nonvolatile memory is used for storing the program of the programmable device so as to realize the self-loading function of the program of the programmable device after power-on.
In some embodiments, the train traction control system is connected to the first traction system and the second traction system respectively through a peripheral component interconnect bus (PCI bus); the peripheral component interconnection bus is used for carrying out data interaction with the first traction system and the second traction system; the first traction system and the second traction system specifically refer to traction systems except the train traction control system. The first traction system and the second traction system are only illustrative, and a third traction system and the like may be introduced according to the different trains in the specific implementation, and the present disclosure is not limited thereto.
In some embodiments, based on the peripheral component interconnect bus, a faster data transmission speed and a wider data width can be obtained.
In some embodiments, the primary control unit and the secondary control unit are connected by an External Memory Interface (EMIF) and an I/O interface.
Through the embodiment, the external memory interface and the I/O interface are adopted as the connection mode between the main control unit and the auxiliary control unit, so that the efficiency of data interaction is improved.
In some embodiments, the above-described main control unit is further configured to generate a switching frequency based on a Pulse Width Modulation (PWM) technique and transmit the switching frequency to the auxiliary control unit.
In some embodiments, the auxiliary control unit is further configured to receive the switching frequency transmitted by the main control unit, so as to control the motor accordingly.
In some embodiments, the data acquisition control unit comprises an analog input module, an analog output module, a digital input module, a digital output module;
the analog input module is used for acquiring analog quantity and performing analog-to-digital conversion on the acquired analog quantity to obtain first digital quantity data;
the analog output module is used for outputting the analog quantity to the first traction system and/or the second traction system so as to monitor the system; the first digital quantity data is also used for outputting the first digital quantity data to an auxiliary control unit so as to carry out digital filtering;
the digital input module is used for acquiring digital quantity and preprocessing the acquired digital quantity to obtain second digital quantity data; wherein the preprocessing may include data denoising;
the digital output module is used for outputting the second digital quantity data to the first traction system and/or the second traction system so as to carry out system test; and the second digital quantity data is also used for outputting the second digital quantity data to the auxiliary control unit so as to carry out digital filtering.
In some embodiments, the main control unit and the auxiliary control unit may be further configured to perform data interaction with a central processor corresponding to the first traction system and the second traction system; wherein the data interactions may include a first data interaction and a second data interaction; the first data interaction specifically refers to a process that a train traction control system acquires information from a central processing unit; the second data interaction specifically refers to a process that the central processing unit acquires information from the train traction control system.
In some embodiments, the first data interaction may specifically include:
the programmable device receives initial instructions sent by a central processing unit corresponding to the first traction system and the second traction system; wherein, the initial instruction is transmitted through the peripheral component interconnect bus; the initial instruction specifically refers to an instruction which can be identified by the peripheral component interconnect bus;
the programmable device decodes the initial instruction to obtain a first instruction; storing the first instruction in a dual-port random access memory; the first instruction specifically refers to an instruction which can be recognized by the main control processor;
the main control processor reads and executes the first instruction through the external memory interface.
In some embodiments, before the above-mentioned main control processor executes the first instruction through the external memory interface, the main control processor may further access an address of the first instruction through the external memory interface to execute the first instruction.
In some embodiments, the second data interaction may specifically include:
the main control processor acquires train operation data and sends the current train state data to the programmable device through the peripheral component interconnection bus;
the programmable device receives train operation data, decodes the current train state data and obtains first data; storing the first data in a dual-port random access memory; the first data specifically refers to data which can be identified by the peripheral component interconnect bus;
and the central processing units corresponding to the first traction system and the second traction system read the first data through the peripheral component interconnection buses so as to carry out traction control on the train.
Through the embodiment, the train traction control system provided by the scheme not only has the characteristics of excellent calculation performance and high control precision of the programmable device, but also has the characteristics of easy development of a digital signal processor and strong digital signal processing capability; meanwhile, the programmable device in the auxiliary control unit bears the calculation tasks of data preprocessing and analog-to-digital conversion, so that the data processing capacity of the digital signal processor is reduced, and the overall operation speed is effectively improved.
In some embodiments, referring to fig. 2, fig. 2 is a schematic diagram of external memory interfacing, where the main control unit sends a first signal to the auxiliary control unit to control and read data from the auxiliary control unit; the first signal includes: a chip select signal (CS), a write enable signal (WE), a read enable signal (RD), an address bus signal (XA [18..0 ]), a data bus signal (XD [ 15..0 ]); the auxiliary control unit sends a second control signal to the main control unit to indicate the current working state; the second signal includes: data bus signal (XD [ 15..0 ]) interrupt hard wire signal (XINT 2). The above-mentioned external memory interfacing method is only a schematic illustration, and other external memory interfacing methods may be adopted according to the type of the chip, and this is not limited in this specification.
The present disclosure further provides another embodiment of a train traction control system, referring to fig. 3, where the train traction control system further includes a power supply unit, and the power supply unit is respectively connected to the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system, and is configured to supply power to the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system; optionally, the level used by the power supply unit may be 1V, 1.9V, 2.5V, 3.3V; optionally, the power supply unit may be further configured to supply power to the storage unit and the communication unit; correspondingly, the power supply unit is respectively connected with the storage unit and the communication unit.
In some embodiments, referring to fig. 3, the train traction control system further includes a storage unit for storing train operation data; wherein the train operation data includes: train operation process data, train monitoring data and train fault data.
In some embodiments, the memory unit is coupled to a master control unit in a train traction control system via an External Memory Interface (EMIF).
In some embodiments, the memory cell comprises a second non-volatile memory, a Static Random Access Memory (SRAM); the second nonvolatile memory may be a NOR Flash nonvolatile memory and/or a NAND Flash nonvolatile memory.
Based on the above embodiment, the static random access memory may have a faster data reading speed, and the second nonvolatile memory may have a larger storage capacity, so that the storage unit may implement fast storage of a large amount of train operation data.
In some embodiments, referring to FIG. 3, the train traction control system further includes a communication unit coupled to a master control unit in the train traction control system; the communication unit includes a Serial Communication (SCI) module, an ethernet communication (ETH) module.
In some embodiments, the serial communication module is used to communicate the train traction system with external devices and to provide a communication link for relevant program upgrades of the train traction system.
In some embodiments, the communication protocol used by the serial communication module may be RS232.
In some embodiments, the ethernet communication module is used for communication between the train traction system and the first traction system and the second traction system, and real-time monitoring of train running state is performed through a local computer, so that transmission of train running data is realized.
In some embodiments, a master control processor in the master control unit may also be used to control the communication unit.
In one specific example of a scenario, the scheme of the present utility model may be applied to traction control of a train. The programmable device in the auxiliary control unit can be a BQ5VSX 50T-type chip; the first nonvolatile memory in the auxiliary control unit may specifically be a B25LV128 type memory; the main control processor in the main control unit can specifically adopt a JDSPF28335 type chip; the static random access memory in the memory unit can be an SM7C type memory; the second nonvolatile memory in the memory unit can be a NOR Flash memory of GD25Q series; the serial communication module in the communication unit can specifically adopt a CBM3232AS16 type chip; the Ethernet communication module in the communication unit can specifically adopt a CH395 type chip; the power supply unit can specifically adopt chips of SGM6010, SGM6011, ME1117 and the like.
Various embodiments in this specification are described in a progressive manner, and identical or similar parts are all provided for each embodiment, each embodiment focusing on differences from other embodiments.
Although the present specification has been described by way of example, it will be appreciated by those skilled in the art that there are many variations and modifications to the specification without departing from the spirit of the specification, and it is intended that the appended claims encompass such variations and modifications as do not depart from the spirit of the specification.
Claims (10)
1. The train traction control system is characterized by at least comprising a main control unit, an auxiliary control unit and a data acquisition control unit; wherein the main control unit is connected with the auxiliary control unit; the auxiliary control unit is connected with the data acquisition control unit;
the auxiliary control unit comprises a programmable device and a first nonvolatile memory; wherein the programmable device may include a dual-port random access memory;
the data acquisition control unit is used for transmitting the acquired first digital quantity data and second digital quantity data to the auxiliary control unit; the programmable device is used for processing the first digital quantity data and the second digital quantity data to obtain first target digital quantity data and second target digital quantity data; the first target digital quantity data and the second target digital quantity data are sent to a dual-port random access memory for storage; the first nonvolatile memory is used for storing programs of the programmable device;
the main control unit comprises a main control processor; wherein the main control processor may comprise a digital signal processor;
the main control unit is used for acquiring the first target digital quantity data and the second target digital quantity data from the dual-port random access memory, and carrying out traction control on the train according to the first target digital quantity data and the second target digital quantity data.
2. The train traction control system of claim 1, wherein the train traction control system is connected to the first traction system and the second traction system, respectively, via a peripheral component interconnect bus; the peripheral component interconnection bus is used for carrying out data interaction with the first traction system and the second traction system.
3. The train traction control system of claim 1, further comprising a power supply unit, wherein the power supply unit is respectively connected to the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system, and is configured to supply power to the main control unit, the auxiliary control unit, and the data acquisition control unit in the train traction control system.
4. The train traction control system of claim 1, further comprising a storage unit for storing train operation data.
5. The train traction control system of claim 4, wherein the memory unit is coupled to a master control unit in the train traction control system via an external memory interface.
6. The train traction control system of claim 4 wherein said storage unit comprises a second non-volatile memory, static random access memory; the second nonvolatile memory may be a NOR Flash nonvolatile memory and/or a NAND Flash nonvolatile memory.
7. The train traction control system of claim 1, further comprising a communication unit coupled to the master control unit in the train traction control system for communication of the train traction system with the first traction system and the second traction system.
8. The train traction control system of claim 7, wherein the communication unit comprises a serial communication module, an ethernet communication module.
9. The train traction control system of claim 1, wherein the primary control unit and the secondary control unit are connected by an external memory interface and an I/O interface.
10. The train traction control system of claim 1, wherein the data acquisition control unit comprises an analog input module, an analog output module, a digital input module, a digital output module;
the analog input module is used for acquiring analog quantity and performing analog-to-digital conversion on the acquired analog quantity to obtain first digital quantity data;
the analog output module is used for outputting the analog quantity to the first traction system and/or the second traction system so as to monitor the system;
the digital input module is used for acquiring digital quantity and preprocessing the acquired digital quantity to obtain second digital quantity data;
the digital output module is used for outputting the second digital quantity data to the first traction system and/or the second traction system so as to carry out system test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222736703.3U CN218907222U (en) | 2022-10-18 | 2022-10-18 | Train traction control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222736703.3U CN218907222U (en) | 2022-10-18 | 2022-10-18 | Train traction control system |
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| CN218907222U true CN218907222U (en) | 2023-04-25 |
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| CN202222736703.3U Active CN218907222U (en) | 2022-10-18 | 2022-10-18 | Train traction control system |
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