阅读说明：本技术 支持主备同驱的单线圈继电器的驱动接口系统 (Driving interface system of single coil relay supporting active-standby driving ) 是由 杨硕 郑晓杰 杨春 王国星 王鹤翔 叶瑞源 许婧 许西鹏 于 2021-06-18 设计创作，主要内容包括：本发明提供一种支持主备同驱的单线圈继电器的驱动接口系统,以使两个互为冗余的安全驱动单元通过所述驱动接口系统驱动单线圈继电器,包括驱动接口模块；驱动接口模块的输入端与主安全驱动单元、备安全驱动单元的输出端连接,驱动接口模块的输出端与单线圈继电器连接,主安全驱动单元和备安全驱动单元互为冗余；驱动接口模块包括强制导向继电器,主安全驱动单元的一组输出连接强制导向继电器的线圈,另一组输出连接强制导向继电器的常开触点,备安全驱动单元的输出连接强制导向继电器的常闭触点；在强制导向继电器的输出端将常开触点和常闭触点并联接到单线圈继电器上。该系统使得主备两块安全驱动单元自检不互相发生影响。(The invention provides a driving interface system for supporting a main-standby driving single-coil relay, so that two mutually redundant safety driving units drive the single-coil relay through the driving interface system, and the driving interface system comprises a driving interface module; the input end of the driving interface module is connected with the output ends of the main safety driving unit and the standby safety driving unit, the output end of the driving interface module is connected with the single-coil relay, and the main safety driving unit and the standby safety driving unit are mutually redundant; the driving interface module comprises a forced guiding relay, one group of output of the main safety driving unit is connected with a coil of the forced guiding relay, the other group of output is connected with a normally open contact of the forced guiding relay, and the output of the standby safety driving unit is connected with a normally closed contact of the forced guiding relay; and the normally open contact and the normally closed contact are connected to the single-coil relay in parallel at the output end of the forced guide relay. The system ensures that the self-checking of the main and standby safety driving units does not influence each other.)

1. A drive interface system supporting a main-standby co-driven single-coil relay, so that two mutually redundant main safety drive units and standby safety drive units drive the single-coil relay through the drive interface system, is characterized by comprising a drive interface module;

the input end of the driving interface module is connected with the output ends of the main safety driving unit and the standby safety driving unit, the output end of the driving interface module is connected with the single-coil relay, and the main safety driving unit and the standby safety driving unit are mutually redundant;

the driving interface module comprises a forced guiding relay, one group of output of the main safety driving unit is connected with a coil of the forced guiding relay, the other group of output is connected with a normally open contact of the forced guiding relay, and the output of the standby safety driving unit is connected with a normally closed contact of the forced guiding relay; coupling the normally open contact and the normally closed contact in parallel to the single coil relay at an output of the forced guided relay;

if the main safety driving unit and the standby driving unit work simultaneously or the main safety driving unit works independently, the main safety driving unit drives the forced guiding relay to close the normally open contact, open the normally closed contact, and connect the main safety driving unit with the single coil relay independently;

if the standby safety driving unit works independently, the normally closed contact is kept closed, the normally open contact is kept opened, and the standby safety driving unit is communicated with the single-coil relay.

2. The driving interface system of a single-coil relay supporting both master and slave drives according to claim 1, further comprising a network-type communication interface extension, wherein the network-type communication interface extension is respectively connected to the driving interface module and the maintenance station, the driving interface module collects first level information, second level information, third level information and fourth level information, the first level information is level information of an output end of the master safety driving unit, the second level information is level information of an output end of the slave safety driving unit, the third level information is level information of an input end of the single-coil relay, the fourth level information is opening and closing state information of the normally closed contact of the forced guidance relay, and transmits the collected level information to the maintenance station through the network-type communication interface extension, so that the maintenance platform monitors the main safety driving unit, the standby safety driving unit and the forced guide relay.

3. The driving interface system of a single-coil relay supporting both master and slave drives according to claim 2, wherein the network type communication interface extension includes a CAN interface and a NET interface to realize a CAN-NET interface conversion function, the CAN interface is connected to the driving interface module, and the NET interface is connected to the maintenance platform.

4. The driving interface system of claim 3, wherein the number of the CAN interfaces is two, the driving interface module communicates with the network-type communication interface extension through the two CAN interfaces simultaneously, and the two CAN interfaces are redundant with each other.

5. The driving interface system of a single-coil relay supporting both master and slave drives according to claim 4, wherein the driving interface module is installed with a collection software for collecting the level information and transmitting the level information to the network-type communication interface extension set through the two mutually redundant CAN interfaces.

6. The driving interface system of a single-coil relay supporting both active and standby driving according to claim 5, wherein the driving interface module collects the level information with a collection time as a period, and sends a collection result to the network-type communication extension with a set time as a period, and if the level information changes, the collection result is directly sent to the network-type communication extension, and the collection time is shorter than the set time.

7. The driving interface system of a single-coil relay supporting both master and slave driving according to claim 6, wherein the acquisition time is less than or equal to 0.5 times of the driving cycle of the master safety driving unit and the slave safety driving unit.

8. The driving interface system of a single-coil relay supporting both master and slave drives according to claim 5, wherein the number of the driving interface modules is plural, each driving interface module has a corresponding CAN communication node number in the network-type communication interface extension, and the driving interface module sends its own basic maintenance information and its own collected level information to the network-type communication extension according to the corresponding CAN communication node number.

9. The driving interface system of a single-coil relay supporting both master and slave drives according to claim 4, wherein the network type communication interface extension receives the level information sent by each driving interface module, uploads the level information to the maintenance station in a set period, receives an inquiry command of the maintenance station, and replies a corresponding command.

Technical Field

The invention relates to the technical field of rail transit circuits, in particular to a driving interface system of a single-coil relay supporting active-standby driving.

Background

In a domestic rail transit signal system, a double-coil relay is generally adopted to construct a rail safety circuit, and in the foreign market and part of domestic applications, the single-coil relay is used to construct the safety circuit due to cost and other factors. The safety driving unit of the rail transit system is used for executing an interlocking machine control command, in order to improve the availability of the system, two redundant safety driving units are usually adopted to respectively output 24V voltage to drive two coils of a double-coil relay to work, and the existing safety driving unit is also designed mainly aiming at the scene. When the redundant two safety driving units drive the single-coil relay together, the output ports of the main system and the standby system are connected to the same group of connecting points, the self-checking result is influenced by the output level of the system port, and finally one safety driving unit enters an unavailable state due to self-checking failure, so that the system availability is reduced.

Therefore, it is necessary to provide a driving interface system, so that the self-tests of the active and standby safety driving units do not affect each other.

Disclosure of Invention

The invention provides a driving interface system of a single-coil relay supporting active and standby driving, aiming at preventing self-checking of two safe driving units from influencing each other.

In order to achieve the above object and other related objects, the present invention provides a driving interface system for supporting both main and standby driving single coil relays, so that two mutually redundant safety driving units drive the single coil relays through the driving interface system, including a driving interface module;

the input end of the driving interface module is connected with the output ends of the main safety driving unit and the standby safety driving unit, the output end of the driving interface module is connected with the single-coil relay, and the main safety driving unit and the standby safety driving unit are mutually redundant;

the driving interface module comprises a forced guiding relay, one group of output of the main safety driving unit is connected with a coil of the forced guiding relay, the other group of output is connected with a normally open contact of the forced guiding relay, and the output of the standby safety driving unit is connected with a normally closed contact of the forced guiding relay; coupling the normally open contact and the normally closed contact in parallel to the single coil relay at an output of the forced guided relay;

if the main safety driving unit and the standby driving unit work simultaneously or the main safety driving unit works independently, the main safety driving unit drives the forced guiding relay to close the normally open contact, open the normally closed contact, and connect the main safety driving unit with the single coil relay independently;

if the standby safety driving unit works independently, the normally closed contact is kept closed, the normally open contact is kept opened, and the standby safety driving unit is communicated with the single-coil relay.

Preferably, the system also comprises a network type communication interface extension set which is respectively connected with the driving interface module and the maintenance platform, the driving interface module collects first level information, second level information, third level information and fourth level information, the first level information is the level information of the output end of the main safety driving unit, the second level information is the level information of the output end of the standby safety driving unit, the third level information is the level information of the input end of the single coil relay, the fourth level information is the opening and closing state information of the normally closed contact of the forced guiding relay, and transmits the collected level information to the maintenance platform through the network type communication interface extension set, so that the maintenance platform monitors the main safety driving unit, the standby safety driving unit and the forced guide relay.

Preferably, the network type communication interface extension includes a CAN interface and a NET interface to realize a CAN-NET interface conversion function, the CAN interface is connected with the driving interface module, and the NET interface is connected with the maintenance platform.

Preferably, the number of the CAN interfaces is two, the drive interface module communicates with the network type communication interface extension set through the two CAN interfaces simultaneously, and the two CAN interfaces are redundant with each other.

Preferably, the drive interface module is provided with acquisition software for acquiring the level information and transmitting the level information to the network type communication interface extension set through the two redundant CAN interfaces.

Preferably, the driving interface module collects the level information with a collection time as a period, and sends a collection result to the network type communication extension with a set time as the period, and if the level information changes, the driving interface module directly sends the collection result to the network type communication extension, and the collection time is shorter than the set time.

Preferably, the acquisition time is less than or equal to 0.5 times of the driving period of the main safety driving unit and the standby safety driving unit.

Preferably, the number of the driving interface modules is multiple, each driving interface module has a corresponding CAN communication node number in the network type communication interface extension, and the driving interface module sends its basic maintenance information and its acquired level information to the network type communication extension according to the corresponding CAN communication node number.

Preferably, the network-type communication interface extension receives the level information sent by each driving interface module, uploads the level information to the maintenance station in a set period, receives an inquiry command of the maintenance station, and replies a corresponding command.

In summary, the invention provides a driving interface system of a single coil relay supporting both main and standby driving, the system adopts a modular design, has flexible expandability, has small volume, can be installed in an existing cabinet, and does not increase additional cabinets and space occupation; furthermore, the application requirement of the main and standby co-drive single coil relays of the safety drive unit is met under the condition that the existing safety drive unit is not changed; furthermore, the input/output and running state of the system can be monitored in real time, the maintainability of the system is ensured, and the maintenance and fault analysis of the existing driving system are facilitated; finally, the system adopts a high-reliability design, and even if the driving interface module is powered off, the onboard relay fails, and the monitoring function fails, the port detection of the safety driving units which are redundant to each other can still be ensured not to influence each other.

Drawings

Fig. 1 is a schematic diagram of a driving interface system of a single-coil relay supporting both main and standby driving according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a driving interface module in a driving interface system of a single-coil relay supporting both active and standby driving according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a network-type communication interface extension in a driving interface system of a single-coil relay supporting both master and slave drives according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of level information transmission by a driving interface module in a driving interface system of a single-coil relay supporting both active and standby driving according to an embodiment of the present invention;

fig. 5 is a schematic flow chart of receiving level information by a network-type communication interface extension in a driving interface system of a single-coil relay supporting both active and standby driving according to an embodiment of the present invention.

Detailed Description

The driving interface system of the single coil relay supporting both main and standby driving according to the present invention will be described in further detail with reference to fig. 1 to 5 and the detailed description. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention. To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the implementation conditions of the present invention, so that the present invention has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Referring to fig. 1, an embodiment of the present invention provides a driving interface system for supporting a primary/standby driven single coil relay, where two mutually redundant safety driving units drive the single coil relay through the driving interface system, and the driving interface system mainly includes a driving interface module, as shown in fig. 1, which includes three groups of safety driving units, and it should be understood by those skilled in the art of the present invention that the number of the groups of the safety driving units is not limited, and may be any multiple groups. For convenience of introduction, the left side of fig. 1 is taken as a main safety driving unit, the right side of fig. 1 is taken as a standby safety driving unit, and the main safety driving unit and the standby safety driving unit are connected with a main control computer; the input end of the driving interface module is connected with the output ends of the main safety driving unit and the standby safety driving unit, the output end of the driving interface module is connected with the single-coil relay, and the main safety driving unit and the standby safety driving unit are mutually redundant; the driving interface module comprises a forced guiding relay, one group of output of the main safety driving unit is connected with a coil of the forced guiding relay, the other group of output is connected with a normally open contact of the forced guiding relay, and the output of the standby safety driving unit is connected with a normally closed contact of the forced guiding relay; coupling the normally open contact and the normally closed contact in parallel to a single coil relay at an output of the forced guided relay;

if the main safety driving unit and the standby safety driving unit work simultaneously or the main safety driving unit works independently, the main safety driving unit drives the forced guiding relay to close the normally open contact and open the normally closed contact, and the main safety driving unit is independently communicated with the single coil relay;

if the standby safety driving unit works independently, the normally closed contact is kept closed, the normally open contact is kept opened, and the standby safety driving unit is communicated with the single-coil relay.

By the arrangement of the driving interface module, the application requirements of the main and standby driving single-coil relays of the safety driving unit can be met under the condition that the existing safety driving unit is not changed; and the input, output and running state of the system can be monitored in real time.

Specifically, in this embodiment, the driving interface module may adopt a configuration as shown in fig. 2, and referring to fig. 2, the driving interface module includes a forced guiding relay, and the main safety driving unit (safety driving unit a) connects the forced guiding relay and the normally open contact; and the standby safety driving unit (safety driving unit B) is connected with the normally closed contact, and the normally open contact and the normally closed contact are mutually exclusive.

The method comprises the following steps that mutually exclusive normally open contacts and normally closed contacts are adopted, normally closed contacts are arranged at the upper part in the figure 2, normally open contacts are arranged at the lower part, when a safety driving unit A and a safety driving unit B are driven simultaneously, the normally open contacts are closed, the normally closed contacts are opened due to the mutual exclusion of the normally open contacts and the normally closed contacts, the safety driving unit A is connected into the single-coil relay for driving, and the safety driving unit B is not connected into the single-coil relay; when the safety driving unit A works and the safety driving unit B stops, the safety driving unit A is also driven independently; when the safety driving unit A stops, the safety driving unit B works, the normally closed contact keeps closed, the normally open contact keeps open due to mutual exclusion, and the safety driving unit B is connected to the single-coil relay for driving; when the safety driving unit A and the safety driving unit B are both stopped, the single-coil relay cannot be driven, and therefore the application requirements of the main and standby co-driven single-coil relays of the safety driving units can be met. Referring to fig. 1, the driving interface module is generally provided with a plurality of forced guiding relays for connecting a plurality of single coil relays, that is, the same group of main and standby safety driving units can simultaneously drive a plurality of single coil relays, for example, N, M, K in the figure can have a value of 1 to 16.

In this embodiment, referring to fig. 3, the driving interface system further includes a network-type communication interface extension set, the network-type communication interface extension set is respectively connected to the driving interface module and the maintenance platform, as shown in fig. 2, the driving interface module is further configured to collect level information of a first port #1, a second port #2, a third port #3 and a fourth port #4, the first port #1 is an output end of the main safety driving unit, the second port #2 is an output end of the standby safety driving unit, the third port #3 is the input end of the single coil relay, the fourth port #4 is connected to the forced guiding relay, and transmits the level information to the maintenance station through the network type communication interface extension, so that the maintenance platform monitors the main safety driving unit, the standby safety driving unit and the forced guide relay.

In this embodiment, referring to fig. 3, in order to ensure the stability of communication, referring to fig. 3, the network-type communication interface extension includes two mutually redundant CAN interfaces and a NET interface to implement a CAN-NET interface conversion function, in order to ensure the stability of communication, the two mutually redundant CAN interfaces are connected to the driving interface module, and the NET interface is connected to the maintenance platform. Meanwhile, in order to improve the maintainability of the system, the driving interface module performs periodic sampling monitoring on four level information and sends a sampling result to the communication extension set through the CAN channel, the communication extension set manages the acquisition result uploaded by each driving interface module and uploads the acquisition result to the maintenance platform equipment according to a protocol format, the four level information are respectively first level information, second level information, third level information and fourth level information, the first level information is the level information of the output end of the main safety driving unit, the second level information is the level information of the output end of the standby safety driving unit, the third level information is the level information of the input end of the single-coil relay, and the fourth level information is the opening and closing state information of the forced-oriented normally closed relay contact.

The driving interface module is implemented by collecting level information, referring to fig. 2, if the level information (i.e., the first level information) of the first port #1 changes, it is determined that the safety driving unit a has a fault; if the level information (i.e., the second level information) of the second port #2 is changed, it is determined that the safety driving unit B has a failure; if the level information of the third port #3 (i.e., the third level information) changes, it may be that the safety driving unit a and the safety driving unit B fail simultaneously, or that the forced guidance relay fails, if the level information of the fourth port #4 (i.e., the fourth level information) also changes simultaneously, it may be that the forced guidance relay fails, and if the level information of the fourth port #4 does not change, it may be that the safety driving unit a and the safety driving unit B fail simultaneously.

In this embodiment, the acquisition unit acquires and transmits the level information, referring to fig. 4, the driving interface module acquires the level information with an acquisition time as a period, and sends an acquisition result to the network-type communication extension with a set time as a period, and if the level information changes, the acquisition result is directly sent to the network-type communication extension, where the acquisition time is shorter than the set time. And according to the nyquist sampling law, the acquisition time is not longer than 0.5 times of the driving period of the main safety driving unit and the standby safety driving unit.

In this embodiment, the number of the driving interface modules is multiple, each driving interface module has a corresponding CAN communication node number in the network type communication interface extension, and the driving interface module sends its basic maintenance information and its acquired level information to the network type communication extension according to the corresponding CAN communication node number.

In this embodiment, referring to fig. 5, the network-type communication interface extension receives the level information sent by each driving interface module, and uploads the level information to the maintenance platform at a set period; and if the query command of the maintenance platform is received, replying the corresponding command.

In conclusion, the modular design is adopted, the flexible expandability is realized, and meanwhile, the system is small in size and can be installed in the existing cabinet without increasing additional cabinets and space occupation; furthermore, the application requirement of the main and standby co-drive single coil relays of the safety drive unit is met under the condition that the existing safety drive unit is not changed; furthermore, the input/output and running state of the system can be monitored in real time, the maintainability of the system is ensured, and the maintenance and fault analysis of the existing driving system are facilitated; finally, the system adopts a high-reliability design, and even if the driving interface module is powered off, the onboard relay fails, and the monitoring function fails, the port detection of the safety driving units which are redundant to each other can still be ensured not to influence each other.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.