CN110865587A - Input/output device based on discrete high-speed redundancy switching - Google Patents
Input/output device based on discrete high-speed redundancy switching Download PDFInfo
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
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Abstract
The invention provides an input/output device based on discrete high-speed redundancy switching, which comprises: the system comprises a plurality of input/output modules and a main control module; the input and output modules are designed in a redundant mode and are provided with fault output lines; the invention adopts a discrete high-speed redundancy switching technology, the technology is applied to an input/output module in an input/output device, and the input/output module is provided with a fault output line and can detect the fault output line of the redundancy module. In the input and output device, the main control module performs data interaction with the input and output module in a CAN communication mode and is responsible for issuing redundancy switching instructions of all the input and output devices. And the input and output module realizes discrete high-speed redundancy switching according to the self fault state, the fault line state of the redundancy module and the switching instruction of the master control. The technical scheme of the invention can realize the redundant switching time less than 10ms, solve the problem of signal interruption caused by slow switching time and improve the reliability of the system.
Description
Technical Field
The invention relates to the technical field of low-voltage control of rail transit vehicles, in particular to an input and output device based on discrete high-speed redundancy switching.
Background
The input and output device is a complex and important subsystem in a vehicle (such as a subway, a train, an automobile and the like), and the input and output device can collect input signals, perform logical operation and output the signals to the subsystems (such as a door control subsystem, an air conditioning subsystem, an indicator light control subsystem and the like) of the vehicle so as to enable the subsystems to control corresponding components in the vehicle. In the input/output devices with higher reliability requirements, a hot standby redundancy mode is generally adopted for design, namely, one group of input/output devices are put into operation, and the other group of hot standby devices are switched rapidly when a fault occurs. A redundant input/output device generally comprises the following equipment, namely a main control module and an input/output module.
In the prior art, a hot standby redundant input/output device generally adopts a centralized redundant switching mode to perform redundant management, that is, an input/output module transmits fault information to a main control module, the main control module performs redundant switching management according to the fault information and issues master-slave information to the input/output module, and the input/output module performs switching according to master-slave instructions.
Disclosure of Invention
In accordance with the above-mentioned technical problem, an input/output device based on discrete high-speed redundancy switching is provided. The input and output device can realize the redundant switching time of less than 10ms, solve the problem of signal interruption caused by slow switching time and improve the reliability of the system.
The technical means adopted by the invention are as follows:
an input-output device based on discrete high-speed redundancy switching, comprising: the system comprises a plurality of input/output modules and a main control module; the input and output modules are designed in a redundant mode and are provided with fault output lines;
the master control module realizes data interaction with the input and output module through a CAN bus.
Furthermore, the input and output module realizes discrete high-speed redundancy switching according to the self fault state, the fault line state of the redundancy module and the switching instruction of the main control module.
Further, the fault output line outputs a pulse waveform in a normal state, the period is t1, the level of the fault output line does not change in a fault state, and the period t1 can be set according to requirements.
Further, the input/output module may detect the status of the failed output line of the redundant module, and when the failed output line of the redundant module is detected to be unchanged within a time period t2, it indicates that the redundant module has a failure.
Further, the period t2 can be set according to the requirement, and generally t2 is equal to 4 to 8 times t 1.
Furthermore, the switching mode is a discrete switching mode, the input and output module can perform switching by itself and listen to the switching instruction of the main control module, and the two modes exist at the same time.
The invention also provides a working method of the input and output device based on discrete high-speed redundancy switching, which comprises the following steps:
s1, the input and output module monitors a primary instruction sent by the main control module in real time when running, and if the primary instruction is sent by the main control module, the input and output module which immediately executes the instruction is switched to be primary;
and S2, if the input/output module is a slave, the input/output module monitors the fault output signal of the redundant module in real time, and if the fault signal of the redundant module does not change within the time t2 and the input/output module does not have a fault, the input/output module is switched to be the master.
Furthermore, the input and output module is a slave module and has no fault; when the fact that the fault line of the redundant module does not change and exceeds t2 is detected, the input/output module is switched to be master, or when a master command sent by the main control module is received, the input/output module is switched to be master.
Compared with the prior art, the invention has the following advantages:
the input and output device provided by the invention can realize the redundancy switching time less than 10ms by a discrete high-speed redundancy switching technology, solves the problem of signal interruption caused by slow switching time and improves the reliability of the system.
Based on the reason, the invention can be widely popularized in the fields of low-voltage control of rail transit vehicles and the like.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of a redundancy design of an input/output device according to the present invention.
FIG. 2 is a flow chart of a discrete high-speed redundancy switching technique of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
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 only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. Any specific values in all examples shown and discussed herein are to be construed as exemplary only and not as limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the absence of any contrary indication, these directional terms are not intended to indicate and imply that the device or element so referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be considered as limiting the scope of the present invention: the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.
As shown in fig. 1, the present invention provides an input/output device based on discrete high-speed redundancy switching, comprising: the system comprises a plurality of input/output modules and a main control module; the input and output modules are designed in a redundant mode and are provided with fault output lines; the main control module realizes data interaction with the input and output module through the CAN bus. In fig. 1, a main control module is a control core of the input/output device, and all input/output logic operations, fault processing, and switching instruction issuing are performed in the main control module. The input and output module realizes discrete high-speed redundancy switching according to the self fault state, the fault line state of the redundancy module and the switching instruction of the main control module, the switching mode is a discrete switching mode, the input and output module can carry out switching by self and simultaneously listen to the switching instruction of the main control module, and the input and output module and the main control module exist at the same time.
In specific implementation, in fig. 1, the input/output module 1-a and the input/output module 1-B are in a redundant relationship, and one is a master and one is a slave during normal operation. The input/output module 1-A and the input/output module 1-B are both provided with fault output lines, the fault output lines output pulse waveforms in a normal state, the period is t1, and the levels of the fault output lines do not change in a fault state. t1 can be set as desired. Meanwhile, the input/output module 1-A and the input/output module 1-B can detect the state of the fault output line of the redundant module, and when the fault output line of the redundant module is not changed within the time t2, the fault output line indicates that the redundant module has a fault. t2 can be set as required, typically t2 equals 4 to 8 times t 1.
As shown in fig. 2, the present invention provides a method for operating an input/output device based on discrete high-speed redundancy switching, comprising the following steps:
s1, the input and output module monitors the primary command sent by the main control module in real time when running, and if the main control module sends the primary command, the input and output module which immediately executes the command is switched to be primary;
and S2, if the input/output module is a slave, the input/output module monitors the fault output signal of the redundant module in real time, and if the fault signal of the redundant module does not change within the time t2 and the input/output module does not have a fault, the input/output module is switched to be the master.
In specific implementation, the input and output module is a slave module and has no fault; when the fact that the fault line of the redundant module does not change and exceeds t2 is detected, the input/output module is switched to be master, and when a master command sent by the main control module is received, the input/output module is also switched to be master.
By combining the two switching modes, the redundant switching speed of the input and output device can be greatly improved, and if t1 is set to be 1ms, t2 is set to be 4ms, and the failure detection time is 1ms, the switching time of the input and output device after failure is 5 ms.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. An input-output device based on discrete high-speed redundancy switching, comprising: the system comprises a plurality of input/output modules and a main control module; the input and output modules are designed in a redundant mode and are provided with fault output lines;
the master control module realizes data interaction with the input and output module through a CAN bus.
2. The input-output device based on discrete high-speed redundancy switching according to claim 1, wherein the input-output module implements discrete high-speed redundancy switching according to its own fault state, fault line state of the redundancy module, and switching instruction of the main control module.
3. The discrete high-speed redundancy switching-based input-output device according to claim 1 or 2, wherein the fault output line outputs a pulse waveform in a normal state with a period t1, the level of the fault output line does not change in a fault state, and the period t1 can be set according to requirements.
4. The discrete high-speed redundancy switching-based input-output device according to claim 1, wherein the input-output module detects the status of the fault output line of the redundant module, and when the fault output line of the redundant module is not changed within a time period t2, it indicates that the redundant module has a fault.
5. The discrete high-speed redundancy switching-based input-output device according to claim 4, wherein the period t2 is set according to requirements, generally t2 is equal to 4 to 8 times t 1.
6. The discrete high-speed redundancy switching-based input-output device according to claim 2, wherein the switching manner is a discrete switching manner, and the input-output module can perform switching by itself and also listen to a switching instruction of the main control module, and both of them exist at the same time.
7. A working method of the input and output device based on the discrete high-speed redundancy switching according to any one of the claims 1 to 5 is characterized by comprising the following steps:
s1, the input and output module monitors a primary instruction sent by the main control module in real time when running, and if the primary instruction is sent by the main control module, the input and output module which immediately executes the instruction is switched to be primary;
and S2, if the input/output module is a slave, the input/output module monitors the fault output signal of the redundant module in real time, and if the fault signal of the redundant module does not change within the time t2 and the input/output module does not have a fault, the input/output module is switched to be the master.
8. The method for operating the discrete high-speed redundancy switching based input-output device according to claim 7, wherein the input-output module is self-slave and has no fault; when the fact that the fault line of the redundant module does not change and exceeds t2 is detected, the input/output module is switched to be master, and when a master command sent by the main control module is received, the input/output module is also switched to be master.
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| CN201911235597.7A CN110865587A (en) | 2019-12-05 | 2019-12-05 | Input/output device based on discrete high-speed redundancy switching |
| PCT/CN2020/133255 WO2021110013A1 (en) | 2019-12-05 | 2020-12-02 | Discrete high-speed redundancy switching-based input/output device |
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Cited By (3)
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| CN112526979A (en) * | 2020-12-16 | 2021-03-19 | 中国兵器装备集团自动化研究所 | Serial communication interface diagnosis system and method of multiple redundancy architecture |
| WO2021110013A1 (en) * | 2019-12-05 | 2021-06-10 | 中车大连电力牵引研发中心有限公司 | Discrete high-speed redundancy switching-based input/output device |
| CN114003014A (en) * | 2021-09-30 | 2022-02-01 | 南京国电南自维美德自动化有限公司 | Method and system for testing redundant switching time of controller |
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