CN113696874B - Brake-by-wire system of railway vehicle and railway vehicle - Google Patents
Brake-by-wire system of railway vehicle and railway vehicle Download PDFInfo
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- CN113696874B CN113696874B CN202110980434.2A CN202110980434A CN113696874B CN 113696874 B CN113696874 B CN 113696874B CN 202110980434 A CN202110980434 A CN 202110980434A CN 113696874 B CN113696874 B CN 113696874B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
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Abstract
The invention provides a brake-by-wire system of a railway vehicle and the railway vehicle, wherein the railway vehicle comprises: the wheel pair is arranged corresponding to the bogie; the brake-by-wire system includes: the first sensing units are arranged in one-to-one correspondence with the wheel sets and used for detecting the motion parameters of the wheel sets; the second sensing unit is arranged corresponding to the bogie and is used for detecting the load parameters of the bogie; the RIOM host is respectively connected with the first induction unit, the second induction unit and the integrated platform host, and transmits load parameters and motion parameters to the integrated platform host; the line control brake unit is respectively connected with the integrated platform host and the wheel pair; the integrated platform host calculates according to the load parameters and the motion parameters to obtain braking parameters and sends the braking parameters to the brake-by-wire unit; and the brake-by-wire unit realizes the braking of the wheel set according to the braking parameters. The invention replaces air brake by brake-by-wire, and has the characteristics of short response time, high response precision, modularization, light weight, networking, intellectualization, environmental protection and the like.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a brake-by-wire system of a railway vehicle and the railway vehicle.
Background
At present, the braking of a railway vehicle is mainly a microcomputer-controlled direct-connection electro-pneumatic braking system, the system design is composed of a series of mechanical devices and control valves, the devices are connected through pipelines to transmit compressed air, but the braking system executed by air has the characteristics of low response precision and unstable response time.
Disclosure of Invention
The invention provides a brake-by-wire system of a railway vehicle, which is used for solving the defects of low response precision and unstable response time of an air-actuated brake system in the prior art, and the brake-by-wire system is adopted to replace the conventional compressed air-actuated basic brake device, so that the current mainstream brake system is redesigned, and a brake-by-wire execution unit realizes the mode that a motor pushes a mechanical structure to compress a friction material instead of the compressed air-actuated mechanical structure to compress the friction material, thereby achieving the characteristics of short response time, high response precision, modularization, light weight, networking, intellectualization, environmental protection and the like.
The invention also provides a railway vehicle, which is used for solving the problems that the braking of the railway vehicle in the prior art is mainly a microcomputer-controlled through electro-pneumatic braking system, the system design is composed of a series of mechanical devices and control valves, the devices are connected through pipelines to transmit compressed air, so that the braking system has the defects of low response precision and unstable response time, the braking of the railway vehicle is changed from the original compressed air braking into electric signal braking by adopting a brake-by-wire instead of the conventional basic braking device executed by the compressed air, and the characteristics of short response time, high response precision, modularization, light weight, networking, intellectualization, environmental protection and the like are achieved.
According to a first aspect of the present invention there is provided a brake-by-wire system for a rail vehicle, the rail vehicle comprising: the bogie comprises a bogie and wheel sets, wherein the wheel sets are arranged corresponding to the bogie;
the brake-by-wire system includes: the brake-by-wire system comprises a first sensing unit, a second sensing unit, a brake-by-wire unit, an integrated platform host and an RIOM host;
the first sensing units are arranged in one-to-one correspondence with the wheel pairs and used for detecting the motion parameters of the wheel pairs;
the second sensing unit is arranged corresponding to the bogie and is used for detecting the load parameters of the bogie;
the RIOM host is respectively connected with the first induction unit, the second induction unit and the integrated platform host and transmits the load parameters and the motion parameters to the integrated platform host;
the brake-by-wire unit is respectively connected with the integrated platform host and the wheel pair;
and the integrated platform host calculates to obtain braking parameters according to the load parameters and the motion parameters, and sends the braking parameters to the brake-by-wire unit, and the brake-by-wire unit realizes the braking of the wheel pair according to the braking parameters.
It should be noted that the braking of the wheel sets on the bogie is realized through the brake-by-wire unit, so that all basic brake units of the railway vehicle are not distinguished whether to have a parking brake function, the interchange and unification of all basic brake units of the railway vehicle are realized, and the maintenance and spare parts of the railway vehicle are reduced.
In addition, the invention provides an integrated platform function integrating ATO and TCMS control, and due to the high responsiveness of the brake-by-wire execution unit, the integrated platform host executes the functions of braking force calculation, electric-air hybrid brake management, braking force distribution, anti-skid control and the like of the whole vehicle.
According to one embodiment of the present invention, the first sensing unit is a speed sensor;
the first sensing unit at least detects the rotating speed of the wheel pair and feeds the rotating speed of the wheel pair serving as the motion parameter back to the RIOM host;
and the RIOM host sends the motion parameters to the integrated platform host, and the integrated platform host calculates the braking parameters according to the motion parameters.
Specifically, the embodiment provides an implementation manner of a first sensing unit, which is to detect the speed of a wheel pair through the first sensing unit, and further apply a corresponding braking force according to the speed of the wheel pair, and after calculating the pressure of pressing friction materials to be executed by a brake-by-wire executing unit, send the calculated pressure to a control board card of the brake-by-wire executing unit, convert the braking pressing force into an execution instruction of a motor, drive the motor to act and apply the pressing force to the friction materials, and further implement braking of the wheel pair.
According to one embodiment of the present invention, the second sensing unit is a piezoelectric sensor;
the second sensing unit at least detects a pressure signal of the bogie, converts the pressure signal of the bogie into an electric signal and feeds the electric signal back to the RIOM host;
the RIOM host sends the electric signals serving as the load parameters to the integrated platform host, and the integrated platform host calculates the braking parameters according to the load parameters;
the second sensing unit is arranged on the primary suspension and/or the secondary suspension of the bogie.
In particular, the present embodiment provides an implementation in which the second sensing unit is a piezoelectric sensor, and by setting the second sensing unit as a piezoelectric sensor, the omission of a brake control unit, an auxiliary brake control device, a brake air cylinder, an air spring air cylinder, a pneumatic foundation brake device, and related pipelines in a conventional railway vehicle is achieved.
Meanwhile, the invention realizes the mode that the motor pushes the mechanical structure to compress the friction material instead of pushing the mechanical structure to compress the friction material by compressed air through the brake-by-wire unit, the RIOM host and the integrated platform host.
It should be noted that the second sensing unit on the primary suspension and/or the secondary suspension is used for measuring the vehicle body load of the rail vehicle, so as to facilitate the calculation of the braking force, and the calculation and the control distribution of the braking force can be realized by adopting an axle control or frame control mode.
According to an embodiment of the present invention, the brake-by-wire system further includes: the air spring is arranged on the bogie;
the second sensing units are pressure sensors, are arranged in one-to-one correspondence with the air springs and are used for detecting pressure signals of the air springs;
the second sensing unit feeds back a pressure signal of the air spring to the RIOM host;
and the RIOM host sends the pressure signal serving as the load parameter to the integrated platform host, and the integrated platform host calculates the braking parameter according to the load parameter.
Specifically, the embodiment provides an implementation mode in which the second sensing unit is a pressure sensor, and the change of the total weight of the passenger or the loaded object of the rail vehicle can be obtained by detecting the pressure signal of the air spring through the second sensing unit, for example, after the rail vehicle arrives at a station, passengers get on or off the rail vehicle, and the pressure signal of the air spring changes with the change of the total weight of the rail vehicle when every time the rail vehicle arrives at the station.
In a possible implementation mode, the air spring does not need supplementary air, namely, does not need external equipment such as an air compressor and the like, and can be realized only through self elastic restoring force.
In a possible embodiment, the air spring needs to be externally connected with compressed air so as to facilitate the compression and recovery of the air spring, and in the embodiment, the air spring is the same as a primary suspension and/or secondary suspension elastic device which is/are conventionally arranged on a railway vehicle.
According to an embodiment of the present invention, the brake-by-wire system further includes: the air compressor is connected with the air springs through the main air pipeline and used for providing compressed air for the air springs.
Particularly, this embodiment provides an implementation mode of air compressor machine and total wind pipeline, because conventional air spring needs to supply compressed air, so this embodiment provides air compressor machine and total wind pipeline, and in practical application, still can set up total wind hose, altitude valve and differential pressure valve etc. as required.
It should be noted that, the load-bearing function and comfort of the air spring are ensured by the cooperation of the altitude valve and the differential pressure valve.
It should be further noted that the main air pipeline and the main air hose are only needed when the rail vehicle is formed by grouping a plurality of vehicles, and the main air pipeline and the main air hose are not needed to be arranged when the rail vehicle is only provided with a single vehicle.
According to an embodiment of the present invention, the brake-by-wire system further includes: and the main air cylinder is respectively connected with the air compressor and the main air pipeline.
Specifically, the present embodiment provides an implementation manner of a main reservoir, which is configured to be used as emergency compressed air after a transient change of a large passenger flow occurs in a railway vehicle, so as to ensure that the air spring can maintain the floor at a certain height in a short time, and the floor is not lower than the platform.
According to one embodiment of the invention, the integrated platform host and the RIOM host realize the transmission of the load parameters and the motion parameters through a TSN backbone network.
According to an embodiment of the present invention, the two integrated platform hosts are respectively disposed at two ends of the rail vehicle, so as to form dual-host hot-standby redundancy.
According to one embodiment of the invention, the two RIOM hosts are respectively arranged at two ends of the railway vehicle and connected with each integrated platform host to form redundant control.
Specifically, this embodiment provides an implementation manner of communication between the integrated platform hosts and the RIOM hosts, in which a TSN backbone network of a rail vehicle connects two RIOM hosts and the integrated platform hosts, air spring pressure signals acquired by the RIOM hosts have been designed redundantly, the two integrated platform hosts also are redundant for hot standby of each other, one RIOM host works as a host, the other as a hot standby only acquires information and does not process it, and the hot standby host performs a host function by receiving a host work task only when the RIOM host fails.
In addition, the brake-by-wire unit device on each bogie receives pressing force required to be applied by the brake friction material of the integrated platform host through the TSN backbone network, and can realize the braking force control of a single wheel beyond the frame control of the current air brake.
Further, the first sensing unit and the second sensing unit on the bogie are respectively connected to the two RIOM main machines in the same mode, so that the condition that the single-shaft speed signal is influenced by the fault of one RIOM main machine is prevented.
Furthermore, the brake-by-wire unit is formed by assembling a control board card, an execution motor and a related brake execution mechanism, the control board card is communicated with the integrated platform host through a TSN backbone network, the brake pressing force sent by the integrated platform host is received and converted into an execution command of the motor, and the motor is driven to act to apply the pressing force to the friction material.
In a possible embodiment, if the bogie takes the form of an independent wheel pair, it is entirely possible to take the form of a wheel-controlled braking system, which is still suitable.
In a possible embodiment, if an independent wheel pair bogie is adopted, a first sensing unit is required to be arranged at the axle box of each wheel, and is used for monitoring the speed of the wheel pair in the braking process, preventing the wheel pair from sliding in the braking process and further performing independent anti-skid control through the speed of the wheel pair.
According to a second aspect of the invention, a rail vehicle is provided, which has a brake-by-wire system of a rail vehicle as described above.
One or more technical solutions in the present invention have at least one of the following technical effects: according to the brake-by-wire system of the railway vehicle and the railway vehicle, the brake-by-wire is adopted to replace the existing basic brake device executed by compressed air, the current mainstream brake system is redesigned, the brake-by-wire execution unit realizes the mode that the motor pushes the mechanical structure to compress a friction material instead of pushing the mechanical structure to compress the friction material by compressed air, and the characteristics of short response time, high response precision, modularization, light weight, networking, intellectualization, environmental protection and the like are achieved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is one of the schematic layout views of a brake-by-wire system for a railway vehicle according to the present invention;
fig. 2 is a second schematic layout diagram of the brake-by-wire system of the railway vehicle provided by the invention.
Reference numerals:
10. a bogie; 11. A wheel set; 12. An air spring;
13. an air compressor; 14. A main air duct; 15. A total reservoir;
20. a first sensing unit; 30. A second sensing unit; 40. A brake-by-wire unit;
50. an integrated platform host; 60. A RIOM host; 70. The TSN backbone network.
Detailed Description
In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "central", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Fig. 1 and 2 are one and two schematic layout diagrams of a brake-by-wire system of a railway vehicle provided by the invention. The solid lines in fig. 1 and 2 represent electrical signals, the dashed lines represent communication channels of the TSN backbone network 70, and the dashed lines represent air lines.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In some embodiments of the present invention, as shown in fig. 1 and 2, the present solution provides a brake-by-wire system for a railway vehicle, the railway vehicle comprising: the bogie comprises a bogie 10 and a wheel set 11, wherein the wheel set 11 corresponds to the bogie 10; the brake-by-wire system includes: the system comprises a first sensing unit 20, a second sensing unit 30, a brake-by-wire unit 40, an integrated platform host 50 and a RIOM host 60; the first sensing units 20 are arranged in one-to-one correspondence with the wheel pairs 11 and used for detecting the motion parameters of the wheel pairs 11; the second sensing unit 30 is arranged corresponding to the bogie 10 and is used for detecting the load parameters of the bogie 10; the RIOM host 60 is respectively connected with the first sensing unit 20, the second sensing unit 30 and the integrated platform host 50, and transmits load parameters and motion parameters to the integrated platform host 50; the brake-by-wire unit 40 is respectively connected with the integrated platform host 50 and the wheel pair 11; the integrated platform host 50 calculates a braking parameter according to the load parameter and the motion parameter, and sends the braking parameter to the brake-by-wire unit 40, and the brake-by-wire unit 40 brakes the wheel set 11 according to the braking parameter.
In detail, the invention provides a brake-by-wire system of a railway vehicle, which is used for solving the defects of low response precision and unstable response time of a brake system executed by air in the prior art, and the brake-by-wire system is adopted to replace the conventional basic brake device executed by compressed air, so that the current mainstream brake system is redesigned, and a brake-by-wire execution unit realizes the mode that a motor pushes a mechanical structure to compress a friction material instead of pushing the mechanical structure to compress the friction material by compressed air, thereby achieving the characteristics of short response time, high response precision, modularization, light weight, networking, intellectualization, environmental protection and the like.
It should be noted that the brake of the wheel set 11 on the bogie 10 is realized by the brake-by-wire unit 40, so that all basic brake units of the railway vehicle are not distinguished whether to have a parking brake function, the interchange and unification of all basic brake units of the railway vehicle are realized, and the maintenance and spare parts of the railway vehicle are reduced.
It should be further noted that, for the calculation of the braking parameters, the data related to the load of the rail vehicle is collected and load parameters are formed, a formula F = M × a is used, the total braking force of the entire vehicle is calculated according to the deceleration requirement required by the rail vehicle command, then the total braking force is distributed to the brake-by-wire unit 40 corresponding to the total braking force, and finally the braking of the wheel set 11 by the brake-by-wire unit 40 is realized, and at the same time, the speed of the wheel set 11 is collected to form motion parameters, so as to monitor the speed of the wheel set 11 during the braking process, prevent the wheel set 11 from skidding during the braking process, and further perform antiskid control by the speed of the wheel set 11.
In addition, the invention provides an integrated platform function integrating ATO and TCMS control, and due to the high responsiveness of the brake-by-wire execution unit, the integrated platform host 50 executes the functions of braking force calculation, electric-air hybrid brake management, braking force distribution, anti-skid control and the like of the whole vehicle, and based on the high-precision response of the brake-by-wire system, the high-precision control of the ATO on the rail vehicles, as well as the virtual connection and virtual marshalling of the rail vehicles can be realized.
In some possible embodiments of the invention, the first sensing unit 20 is a speed sensor; the first sensing unit 20 at least detects the rotating speed of the wheel pair 11, and feeds the rotating speed of the wheel pair 11 as a motion parameter back to the RIOM host 60; the RIOM host 60 sends the motion parameters to the integrated platform host 50, and the integrated platform host 50 calculates braking parameters according to the motion parameters.
Specifically, the embodiment provides an implementation manner of the first sensing unit 20, which is to detect the speed of the wheel set 11 through the first sensing unit 20, further apply a corresponding braking force according to the speed of the wheel set 11, calculate the pressure of the friction material to be pressed by the brake-by-wire executing unit, send the calculated pressure to the control board of the brake-by-wire executing unit, convert the braking pressing force into an executing instruction of the motor, drive the motor to act and apply the pressing force to the friction material, and further brake the wheel set 11.
In some possible embodiments of the invention, the second sensing unit 30 is a piezoelectric sensor; the second sensing unit 30 at least detects the pressure signal of the bogie 10, converts the pressure signal of the bogie 10 into an electrical signal, and feeds the electrical signal back to the RIOM host 60; the RIOM host 60 sends the electric signals as load parameters to the integrated platform host 50, and the integrated platform host 50 calculates braking parameters according to the load parameters; the second sensing unit 30 is disposed on the primary suspension and/or the secondary suspension of the bogie 10.
Specifically, the present embodiment provides an implementation in which the second sensing unit 30 is a piezoelectric sensor, and by setting the second sensing unit 30 as a piezoelectric sensor, the omission of a brake control unit, an auxiliary brake control device, a brake reservoir, an air spring reservoir, a pneumatic foundation brake device, and related piping in a conventional railway vehicle is achieved.
Meanwhile, the invention realizes the mode that the friction material is pressed by the mechanical structure pushed by the motor instead of the compressed air through the brake-by-wire unit 40, the RIOM host 60 and the integrated platform host 50.
It should be noted that the second sensing unit 30 on the primary suspension and/or the secondary suspension is used for measuring the vehicle body load of the rail vehicle, so as to facilitate the calculation of the braking force, and the calculation and the control distribution of the braking force can be realized in an axle control or frame control manner.
In some possible embodiments of the invention, the brake-by-wire system further comprises: an air spring 12, the air spring 12 being provided to the bogie 10; the second sensing units 30 are pressure sensors, are arranged in one-to-one correspondence with the air springs 12, and are used for detecting pressure signals of the air springs 12; wherein, the second sensing unit 30 feeds back the pressure signal of the air spring 12 to the rim host 60; the RIOM host computer 60 sends the pressure signal as a load parameter to the integrated platform host computer 50, and the integrated platform host computer 50 calculates a braking parameter according to the load parameter.
Specifically, the embodiment provides an implementation mode in which the second sensing unit 30 is a pressure sensor, and the pressure signal of the air spring 12 is detected by the second sensing unit 30, so that the change situation of the total weight of the passenger or the loaded object of the railway vehicle can be known, for example, after the railway vehicle arrives at a station, passengers get on or off the railway vehicle, and the pressure signal of the air spring 12 changes with the change of the total weight of the railway vehicle every time the railway vehicle arrives at the station.
In a possible embodiment, the air spring 12 does not need supplementary air, that is, does not need an external air compressor 13 or other equipment, and can be realized only through self elastic restoring force, and in the embodiment, the air spring 12 is different from a primary suspension and/or secondary suspension elastic equipment which is conventionally arranged on a railway vehicle.
In a possible embodiment, the air spring 12 needs to be externally connected with compressed air so as to facilitate the compression and recovery of the air spring 12, and in the embodiment, the air spring 12 is the same as a primary suspension and/or secondary suspension elastic device which is conventionally arranged on a railway vehicle.
In some possible embodiments of the invention, the brake-by-wire system further comprises: air compressor 13 and main air pipe 14, air compressor 13 is connected with air spring 12 through main air pipe 14 for provide compressed gas for air spring 12.
Specifically, the present embodiment provides an implementation manner of the air compressor 13 and the main air pipeline 14, and since the conventional air spring 12 needs to supplement compressed air, the present embodiment provides the air compressor 13 and the main air pipeline 14, and in practical application, a main air hose, a height valve, a differential pressure valve, and the like may be further provided as needed.
It should be noted that, by the cooperation of the altitude valve and the differential pressure valve, the load-bearing function and comfort of the air spring 12 are ensured.
It should be noted that the main air duct 14 and the main air hose are only required when the rail vehicle is formed by a plurality of vehicle groups, and the main air duct 14 and the main air hose are not required to be arranged when the rail vehicle is formed by a single vehicle.
In some possible embodiments of the invention, the brake-by-wire system further comprises: and the main air cylinder 15 are respectively connected with the air compressor 13 and the main air pipeline 14.
Specifically, the present embodiment provides an implementation of the main reservoir 15, and the main reservoir 15 is provided to be used as emergency compressed air after a transient change of a large passenger flow occurs in the rail vehicle, so as to ensure that the air spring 12 can maintain the floor at a certain height in a short time, and the floor is not lower than the platform.
In some possible embodiments of the present invention, the integrated platform host 50 and the RIOM host 60 implement the transmission of the load parameters and the motion parameters through the TSN backbone 70.
In some possible embodiments of the present invention, two integrated platform hosts 50 are respectively disposed at two ends of the rail vehicle, so as to form dual-host hot-standby redundancy.
In some possible embodiments of the present invention, two RIOM hosts 60 are respectively disposed at two ends of the rail vehicle and connected to each integrated platform host 50 to form a redundant control.
Specifically, the present embodiment provides an implementation of communication between the integrated platform hosts 50 and the RIOM hosts 60, a TSN backbone 70 of a rail vehicle connects the two RIOM hosts 60 and the integrated platform hosts 50, the pressure signals of the air springs 12 acquired by the RIOM hosts 60 have been designed redundantly, the two integrated platform hosts 50 are also redundant for dual-host hot-standby each other, one RIOM host 60 works as a host, the other one works as a hot-standby only to acquire information and is not processed, and the hot-standby host only receives a host work task to execute a host function when the RIOM host 60 fails.
In addition, the brake-by-wire unit 40 device on each bogie 10 receives the pressing force required to be applied by the brake friction material of the integrated platform host 50 through the TSN backbone 70, and can realize the control of the braking force of a single wheel beyond the current frame control of air braking, but considering the universality of the bogie 10, the single wheels are connected through wheel shafts to form a wheel pair 11, so that the braking of the wheel pair 11 can also be realized.
Further, the first sensing unit 20 and the second sensing unit 30 on the bogie 10 are respectively connected to the two rim main machines 60 in the same manner, so that the single-axle speed signal is prevented from being influenced by the failure of one of the rim main machines 60.
Further, the brake-by-wire unit 40 is assembled by a control board, an execution motor and related brake execution mechanisms, the control board communicates with the integrated platform host 50 through the TSN backbone network 70, receives the brake pressing force sent by the integrated platform host 50 and converts the brake pressing force into an execution command of the motor, and drives the motor to act to apply the pressing force to the friction material.
In a possible embodiment, if the bogie 10 is in the form of an independent wheel pair 11, it is entirely possible to use a wheel-controlled braking system, which is still suitable.
In a possible embodiment, if an independent wheel-set 11 bogie 10 is used, a first sensing unit 20 is installed at the axle box of each wheel for monitoring the speed of the wheel-set 11 during braking, preventing the wheel-set 11 from skidding during braking, and performing independent anti-skidding control according to the speed of the wheel-set 11.
In some embodiments of the invention, the present disclosure provides a railway vehicle having a brake-by-wire system of a railway vehicle as described above.
In detail, the invention also provides a railway vehicle, which is used for solving the problems that the braking of the railway vehicle in the prior art is mainly a microcomputer-controlled through electro-pneumatic braking system, the system design is composed of a series of mechanical devices and control valves, the devices are connected through pipelines to transmit compressed air, and further the braking system has the defects of low response precision and unstable response time.
In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "a manner," "a particular manner," or "some manner" or the like, means that a particular feature, structure, material, or characteristic described in connection with the embodiment or manner is included in at least one embodiment or manner of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or mode. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or modes. Furthermore, various embodiments or modes described in this specification, as well as features of various embodiments or modes, may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the present invention and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (6)
1. A brake-by-wire system for a rail vehicle, the rail vehicle comprising: the bogie comprises a bogie and wheel sets, wherein the wheel sets are arranged corresponding to the bogie;
the brake-by-wire system includes: the brake-by-wire system comprises a first sensing unit, a second sensing unit, a brake-by-wire unit, an integrated platform host and an RIOM host;
the first sensing units are arranged in one-to-one correspondence with the wheel pairs and used for detecting the motion parameters of the wheel pairs;
the second sensing unit is arranged corresponding to the bogie and is used for detecting the load parameters of the bogie;
the RIOM host is respectively connected with the first sensing unit, the second sensing unit and the integrated platform host, and transmits the load parameters and the motion parameters to the integrated platform host;
the first sensing unit is a speed sensor;
the first sensing unit at least detects the rotating speed of the wheel pair and feeds the rotating speed of the wheel pair serving as the motion parameter back to the RIOM host;
the RIOM host sends the motion parameters to the integrated platform host, and the integrated platform host calculates braking parameters according to the motion parameters;
the second sensing unit is a piezoelectric sensor;
the second sensing unit at least detects a pressure signal of the bogie, converts the pressure signal of the bogie into an electric signal and feeds the electric signal back to the RIOM host;
the RIOM host sends the electric signals serving as the load parameters to the integrated platform host, and the integrated platform host calculates the braking parameters according to the load parameters;
the second sensing unit is arranged on a primary suspension and/or a secondary suspension of the bogie;
the brake-by-wire unit is respectively connected with the integrated platform host and the wheel pair;
the integrated platform host calculates to obtain braking parameters according to the load parameters and the motion parameters, and sends the braking parameters to the brake-by-wire unit, and the brake-by-wire unit realizes the braking of the wheel pair according to the braking parameters;
the integrated platform host and the RIOM host realize the transmission of the load parameters and the motion parameters through a TSN backbone network;
the two integrated platform hosts are respectively arranged at two ends of the railway vehicle to form dual-machine hot standby redundancy.
2. The brake-by-wire system of a railway vehicle of claim 1, further comprising: the air spring is arranged on the bogie;
the second sensing units are pressure sensors, are arranged in one-to-one correspondence with the air springs and are used for detecting pressure signals of the air springs;
the second sensing unit feeds back a pressure signal of the air spring to the RIOM host;
and the RIOM host sends the pressure signal serving as the load parameter to the integrated platform host, and the integrated platform host calculates the braking parameter according to the load parameter.
3. The brake-by-wire system of a railway vehicle of claim 2, further comprising: the air compressor is connected with the air springs through the main air pipeline and used for providing compressed air for the air springs.
4. A brake-by-wire system for a rail vehicle according to claim 3, further comprising: and the main air cylinder is respectively connected with the air compressor and the main air pipeline.
5. The brake-by-wire system of claim 1, wherein two RIOM host computers are respectively arranged at two ends of the railway vehicle and connected with each integrated platform host computer to form redundant control.
6. A rail vehicle, characterized by a brake-by-wire system of a rail vehicle according to any one of the preceding claims 1 to 5.
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