CN108009056A - A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method - Google Patents
A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method Download PDFInfo
- Publication number
- CN108009056A CN108009056A CN201711465262.5A CN201711465262A CN108009056A CN 108009056 A CN108009056 A CN 108009056A CN 201711465262 A CN201711465262 A CN 201711465262A CN 108009056 A CN108009056 A CN 108009056A
- Authority
- CN
- China
- Prior art keywords
- relay
- host
- unit
- active
- standby
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000012360 testing method Methods 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 14
- 230000002159 abnormal effect Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000007717 exclusion Effects 0.000 abstract description 4
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001427 coherent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
- G06F11/2002—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant
- G06F11/2005—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where interconnections or communication control functionality are redundant using redundant communication controllers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/18—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits
- G06F11/182—Error detection or correction of the data by redundancy in hardware using passive fault-masking of the redundant circuits based on mutual exchange of the output between redundant processing components
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Hardware Redundancy (AREA)
Abstract
The present invention relates to a kind of safety computer platform two-node cluster hot backup switching and fault detection system and method, including the first host and the second host, first active and standby system's recognition unit, the first relay, Fisrt fault safe unit are equipped with first host, second active and standby system's recognition unit, the second relay and the second failure safe unit are equipped with second host；First host is by being that a synchronization unit and the second host carry out data exchange.The present invention is interlocked using safety relay, and the relation of two owner's machines formation mutual exclusion, has and only have one and be tied to form as main owner's machine；And two owner's machine at the same time detect two safety relays state, it ensure that the reliability of testing result, avoid the failure of monosystem detection so that two systems can judge the working status of itself and other side system in the same time, drastically increase the security and availability of system.
Description
Technical field
The present invention relates to track traffic signal control field, and in particular to a kind of safety computer platform two-node cluster hot backup switching
With fault detection system and method.
Background technology
At present, generally track is handed over to realize using with the safety computer platform system of specific redundancy framework both at home and abroad
The control of messenger, mobile unit and other coherent signal equipment.And based on security, reliability and maintainability etc.
Consideration, when carrying out safety computer platform system design, many products all use two-node cluster hot backup designing scheme.System by
Two sets of identical safety control systems are formed, and wherein principal series performs control function, it is standby tie up to guarantee it is synchronous with principal series before
Put as hot-backup system, ensure, in the case where monosystem breaks down, normal signal can be completed by active and standby system's switching
The process of control.
Switching, detection method and the output of existing Dual-Computer Hot-Standby System are generally relatively or logical all using simple bus
A kind of active and standby system's judging module is crossed to realize that the active and standby system of Dual-Computer Hot-Standby System switches.But in failure conditions, above two
Switching, detection method are difficult the uniqueness and security of reliable guarantee system output order, that is to say, that occur " double masters " or
The probability of the standby system's output of person is larger, so it is difficult to meet the security requirement of Dual-Computer Hot-Standby System switching.
The content of the invention
It is an object of the invention to provide a kind of safety computer platform two-node cluster hot backup switching and fault detection system and side
Method, to solve the problems, such as that existing safety computer platform Dual-Computer Hot-Standby System switching is low with detection method security.
To achieve the above object, present invention employs following technical scheme：
A kind of safety computer platform two-node cluster hot backup switching and fault detection system, including the first host and the second host,
First active and standby system's recognition unit, the first relay, Fisrt fault safe unit, second host are equipped with first host
Inside it is equipped with second active and standby system's recognition unit, the second relay and the second failure safe unit；
First host is by being that a synchronization unit and the second host carry out data exchange；
The first active and standby recognition unit and second active and standby system's recognition unit, for monitoring the first relay and the second relay
The contacts status of device, the working status of the first host and the second host is judged by contacts status；
The Fisrt fault safe unit and the second failure safe unit, for the work according to the first host, the second host
Make state, the connection of the first relay of control, the second relay and power supply.
Further, manually switch unit is connected first host with the second host；The manual switching unit,
Connection for controlling the first relay, the second relay and power supply switches, and principal series identity switches between realizing two hosts.
Further, synchronization unit uses ethernet communication line, CAN bus or RS485 between the system.
Further, the output contact common port of first relay passes through first switch and Fisrt fault safe unit
Output terminal connection, the coil of the first relay is connected with the normally opened contact of the second relay, the normally opened contact of the first relay
It is connected with the test side of first active and standby system's recognition unit；The output contact common port of second relay by second switch with
The normally-closed contact circuit of the output terminal connection of second failure safe unit, the coil of the second relay and the first relay, second
The normally opened contact of relay is connected with the test side of second active and standby system's recognition unit.
Further, the manual switching unit uses change-over switch.
Further, the first switch and second switch use optocoupler, metal-oxide-semiconductor, relay or triode, and described first
Output terminal of the control terminal of switch and second switch respectively with Fisrt fault safe unit, the second failure safe unit is connected.
A kind of safety computer platform two-node cluster hot backup switching and fault detection method, comprise the following steps：
First active and standby recognition unit and second active and standby system's recognition unit monitor the contact of the first relay and the second relay
State, the working status of the first host and the second host is judged by contacts status；
When the first host is main owner's machine, normally closed touch of the first relay remains closed, and controls the inside the second host
Two relay energizeds, the second relay normally closed contact stays open so that the second relay coil remains dead electricity, the first relay
Device maintains full state；
First active and standby system's recognition unit and second active and standby system's recognition unit detect the first relay and the second relay at the same time
Contacts status, according to obtained status signal, the first host judges itself to be principal series, and other side is standby system, and the second host judges
Itself it is standby system, other side is principal series；
When the first host breaks down under principal series state, Fisrt fault safe unit can cut off the first relay
Active and standby system's competition power supply, the second relay coil dead electricity, the normally-closed contact closure of the second relay, then supplies to the first relay
Electricity, can detect that principal series host at this time by the first mian engine changeover to the second host, realizes the detection of failure safe and cuts
Change；
When the first host it is standby be to break down under state when, Fisrt fault safe unit can cut off the first relay
Active and standby system competes power supply, and the second host can detect that the contact of the first relay is returned and survey abnormal signal, the second host control at this time
Make itself and do not cut and be.
The present invention manually can force the first host or the second host to become principal series host by switch unit.When manual
Switch unit is forced in the first host, and system mandatory can maintain the active and standby system competition power supply of the first relay of output, so that
So that the first host becomes principal series host.
First host and the second host can be by being that an exchange for synchronization unit progress data is respective active and standby to determine
It is identity state, when it is all main owner's machine that the first host and the second host, which are detected simultaneously by itself, system failure to the safe side.
As shown from the above technical solution, safety computer platform two-node cluster hot backup switching of the present invention and fault detect system
System and method, are interlocked using safety relay, and two owner's machines form the relation of mutual exclusion, have and only have one and are tied to form as principal series
Host；And two owner's machine at the same time detect two safety relays state, ensure that the reliability of testing result, avoid monosystem
The failure of detection so that two systems can judge the working status of itself and other side system in the same time, drastically increase system
Security and availability；At the same time between two owner's machines by being that a synchronization unit connects, the exchange of data can be carried out, and
A kind of mode of system detectio " double masters ".
Brief description of the drawings
Fig. 1 is the system diagram of the present invention；
Fig. 2 is the circuit diagram of the present invention.
Embodiment
The present invention will be further described below in conjunction with the accompanying drawings：
As shown in Figure 1, the safety computer platform two-node cluster hot backup switching of the present embodiment and fault detection system, including first
1 and second host 2 of host, 1 interior first active and standby system's recognition unit 11, the first relay 13, the Fisrt fault of being equipped with of the first host are pacified
Full unit 12, is equipped with second active and standby system's recognition unit 21, the second relay 22 and the second failure safe unit in the second host 2
23；First host 1 can monitor the active and standby system of peer by being that 4 and second host 2 of a synchronization unit carries out data exchange
State, so as to more ensure that the output safety and reliability of Dual-Computer Hot-Standby System.
First active and standby 11 and second active and standby system's recognition unit 21 of recognition unit, for monitor the second relay 13 and second after
The contacts status of electric appliance 22, the working status of the first host 1 and the second host 2 is judged by contacts status；Fisrt fault safety
12 and second failure safe unit 23 of unit, for the working status according to the first host 1, the second host 2, controls the first relay
The connection of device 13, the second relay 22 and power supply；By above-mentioned state, the first host 1 and the second host 2 can be known certainly at the same time
Body and active and standby system's state of other side, and then can be determined that whether the work of itself and other side are normal.
Manually switch unit 3 is connected first host 1 with the second host 2, the manual switching unit 3, for controlling the
The connection of one relay 13, the second relay 22 and power supply switches, and principal series identity switches between realizing two hosts.This fact Example
Described is that a synchronization unit 4 is made of the ethernet communication line of two redundancies.
The output that the output contact common port of second relay 13 passes through first switch K1 and Fisrt fault safe unit 12
End connection, the coil of the second relay 13 is connected with the normally opened contact of the second relay, the normally opened contact of the second relay 13 and
The test side connection of first active and standby system's recognition unit 11；The output contact common port of second relay passes through second switch and second
The normally-closed contact circuit of the output terminal connection of failure safe unit 23, the coil of the second relay and the second relay 13, second
The normally opened contact of relay is connected with the test side of second active and standby system's recognition unit 21.The normally-closed contact control of first relay 13
Make the coil power supply power supply of the first relay 13.The normally-closed contact of second relay 22 controls the coil of the second relay 22
Power supply, both form the relation of mutual exclusion, ensure that be not under normal circumstances " double masters " situation.
The present embodiment, manual switching unit 3 uses change-over switch, first switch K1 and second switch K2 using optocoupler,
The control terminal of metal-oxide-semiconductor, relay or triode, first switch K1 and second switch K2 respectively with Fisrt fault safe unit 12,
The output terminal connection of second failure safe unit 23.
Specifically, as shown in Fig. 2, the structure diagram of the relay interlocking and detection in the present embodiment, embodiment is such as
Under：Two owner's machines are identical two control systems, and when powering on, this sentences the first host 1 and is preferentially arranged to principal series system
Illustrate exemplified by host.When powering on the same time, the first host 1 of setting is main owner's machine for first host 1 and the second host 2, the
Two hosts 2 are standby owner's machine.5,6 in Fig. 2 represent that survey line is returned in contact.
It is main owner's machine that first host 1, which obtains the identity of itself, and control 24VDC_I first obtains itself to electricity, the second host 2
For standby owner's machine, control after 24VDC_II to electricity.First relay, 13 normally-closed contact NC1 is closure, and the first relay 13 is logical
Mutual locking wire A1B1 is crossed to 22 coil power supply of the second relay, the normally opened contact NC2 of the second relay 22 is in an open state, to first
The A2B2 lines that relay 13 is powered disconnect, and the first relay 13 keeps full state.First host 1 and the second host 2 pass through master
Standby is the contacts status that recognition unit detects two safety relays.At this time, the first host 1 and the second host 2 pass through at the same time
D1A1 detects normally opened NO1 and the normally-closed contact NC1 of the first relay 13, while detects the normally opened of the second relay 22 by D2A2
NC2 and normally-closed contact NO2, the first host 1 can judge itself by returning the state of the contact NO1 measured and contact NC1
Active and standby system's state, such as table 1；Unified：There is electricity to be determined as 1, no electricity is determined as 0：
Table 1
| The state of NO | The state of NC | Active and standby system's state of host I |
| 0 | 1 | Principal series |
| 1 | 0 | Standby system |
| 0 | 0 | Standby system |
| 1 | 1 | Into malfunction |
According to table 1 it is recognised that the first host 1 judges itself to be principal series, and power on setting and be consistent, when what is detected
When as a result malfunctioning, system takes safety measures.Meanwhile first host 1 can be sentenced by returning the state of the NO2 that measures and NC2
Determine the state of other side system, according to table 1 it is recognised that the first host 1 is determined as that the second host 2 is standby system, and power on setting and keep
Unanimously, when the result error detected, system takes safety measures.
Likewise, the second host 2 can also judge active and standby system's state of itself and other side system, testing result by table 1
For：Second host 2 judges itself to be standby system, and the first host 1 is principal series；System takes safety measures during error.
It should be noted that：The contact of relay, which is returned, surveys normally opened and normally-closed contact signal of the signal by same safety relay
Composition, this takes full advantage of, and safety relay is normally opened and the characteristic of normally-closed contact mutual exclusion, ensures the correctness of testing result.When
When there is the level of " 11 " in the contact signal that Host Detection arrives, it is possible to determine that detection circuit occurs abnormal at this time, and system can adopt
Safety measure is taken, so as to ensure that the security of system output.
When the first host 1 of principal series breaks down, it is that principal series host is changed into the second host from the first host 1 to cut
2,24VDC_I are switched on and off K1 disconnections, and the NC1 contacts of the first relay 13 can not provide power supply to the second relay 22, second after
Electric appliance 22 is fallen, NC2 contact closures, and 24VDC_II supplies electricity to the first relay 13, is opened its NC1, is then maintained contact
NC1 is opened, the state of contact NC2 closures.At this time, returning for relay contact is surveyed by two owner's machines, contrast table 1, it is known that the
Two hosts 2 are changed into principal series operation, and the second host 2 is downgraded to standby system's operation.
The present invention can cut mandatory to system progress of switch unit 3 be manually operation.When manual switching unit 3 is beaten
In the first 1 gear of host, manual switching unit 3 maintains 24VDC_I to have electricity by force by C1 lines at this time so that the first relay
The active and standby system's competition 24VDC_I of 13 outputs, picks up the second relay 22, the first host 1 becomes principal series host at this time.Work as manual switching
Unit 3 is beaten in the second 2 gear of host, and manual switching unit 3 maintains 24VDC_II to have electricity by force by C2 lines at this time so that the
Two relays 22 export active and standby system's competition power supply 24VDC_II, pick up the first relay 13, the second host 2 becomes principal series master at this time
Machine.When manual switching unit 3 is beaten in " automatic " gear, manual switching unit 3 does not control the active and standby system of any system to compete electricity
Source, the two active and standby systems of owner's machine free competition.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, should all fall into the protection domain that claims of the present invention determines.
Claims (7)
1. a kind of safety computer platform two-node cluster hot backup switching and fault detection system, it is characterised in that：Including the first host and
Second host, first host is interior to be equipped with first active and standby system's recognition unit, the first relay, Fisrt fault safe unit, institute
State in the second host and be equipped with second active and standby system's recognition unit, the second relay and the second failure safe unit；
First host is by being that a synchronization unit and the second host carry out data exchange；
The first active and standby recognition unit and second active and standby system's recognition unit, for monitoring the first relay and the second relay
Contacts status, the working status of the first host and the second host is judged by contacts status；
The Fisrt fault safe unit and the second failure safe unit, for the work shape according to the first host, the second host
State, the connection of the first relay of control, the second relay and power supply.
2. safety computer platform two-node cluster hot backup switching according to claim 1 and fault detection system and method, it is special
Sign is：Manually switch unit is connected first host with the second host；
The manual switching unit, the connection for controlling the first relay, the second relay and power supply switch, and realize two masters
Principal series identity switches between machine.
3. safety computer platform two-node cluster hot backup switching according to claim 1 and fault detection system and method, it is special
Sign is：Synchronization unit uses ethernet communication line, CAN bus or RS485 between the system.
4. safety computer platform two-node cluster hot backup switching according to claim 1 and fault detection system and method, it is special
Sign is：The output contact common port of first relay is connected by the output terminal of first switch and Fisrt fault safe unit
Connect, the coil of the first relay is connected with the normally opened contact of the second relay, the normally opened contact of the first relay and first active and standby
It is the test side connection of recognition unit；
The output contact common port of second relay is connected by second switch with the output terminal of the second failure safe unit,
The normally-closed contact circuit of the coil of second relay and the first relay, the normally opened contact of the second relay and the second active and standby system know
The test side connection of other unit.
5. safety computer platform two-node cluster hot backup switching according to claim 2 and fault detection system and method, it is special
Sign is：The manual switching unit uses change-over switch.
6. safety computer platform two-node cluster hot backup switching according to claim 4 and fault detection system and method, it is special
Sign is：The first switch and second switch use optocoupler, metal-oxide-semiconductor, relay or triode, the first switch and second
Output terminal of the control terminal of switch respectively with Fisrt fault safe unit, the second failure safe unit is connected.
7. a kind of safety computer platform two-node cluster hot backup switching and fault detection method, it is characterised in that comprise the following steps：
First active and standby recognition unit and second active and standby system's recognition unit monitor the contacts status of the first relay and the second relay,
The working status of the first host and the second host is judged by contacts status；
When the first host is main owner's machine, the first relay normally closed contact remains closed, and controls second inside the second host
Relay energized, the normally-closed contact of the second relay stay open, and the coil of the first relay is remained power failure state, and first
Relay keeps connected state；
First active and standby system's recognition unit and second active and standby system's recognition unit detect touching for the first relay and the second relay
Dotted state, according to obtained status signal, judge the principal series of the first host and the second host with it is standby be relation；
When the first host breaks down under principal series state, Fisrt fault safe unit cuts off the active and standby system electricity of the first relay
Source, the coil losing electricity of the second relay, the normally-closed contact closure of the second relay, the power supply of the first relay；
When the first host it is standby be to break down under state when, Fisrt fault safe unit cuts off the active and standby system electricity of the first relay
Source, the contact of second the first relay of Host Detection, which is returned, surveys signal, if contact, which is returned, surveys abnormal signal, the second host computer control itself
Do not cut and be.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465262.5A CN108009056A (en) | 2017-12-28 | 2017-12-28 | A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711465262.5A CN108009056A (en) | 2017-12-28 | 2017-12-28 | A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108009056A true CN108009056A (en) | 2018-05-08 |
Family
ID=62049123
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711465262.5A Pending CN108009056A (en) | 2017-12-28 | 2017-12-28 | A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108009056A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459496A (en) * | 2018-05-17 | 2018-08-28 | 兰州大成铁路信号有限公司 | Safety Redundancy system for railway signal system |
| CN110532132A (en) * | 2019-03-22 | 2019-12-03 | 合肥工大高科信息科技股份有限公司 | Hot standby server security control method, medium and equipment |
| CN110716421A (en) * | 2018-07-11 | 2020-01-21 | 兰州大成铁路信号有限公司 | Execution unit switching circuit, electronic execution system comprising same and switching method |
| CN110716422A (en) * | 2018-07-11 | 2020-01-21 | 兰州大成铁路信号有限公司 | Electronic execution unit, electronic execution system comprising same and switching method |
| CN110968021A (en) * | 2019-12-20 | 2020-04-07 | 上海亨钧科技股份有限公司 | Interlocking machine dual-system switching system and control method |
| CN113410908A (en) * | 2021-06-18 | 2021-09-17 | 卡斯柯信号有限公司 | Driving interface system of single coil relay supporting active-standby driving |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002222160A (en) * | 2001-01-26 | 2002-08-09 | Fujitsu Ltd | Repeating installation |
| CN102570591A (en) * | 2012-01-14 | 2012-07-11 | 北京鼎汉技术股份有限公司 | Switching system and switching method for dual-computer hot standby |
| CN203027276U (en) * | 2012-12-10 | 2013-06-26 | 北京交控科技有限公司 | Dual-machine hot standby platform |
| CN104485940A (en) * | 2014-11-20 | 2015-04-01 | 苏州富欣智能交通控制有限公司 | Two-machine hot standby switching circuit |
| CN106254097A (en) * | 2016-07-20 | 2016-12-21 | 浙江众合科技股份有限公司 | A kind of ATS system two-shipper arbitration system judged based on third party and method |
-
2017
- 2017-12-28 CN CN201711465262.5A patent/CN108009056A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002222160A (en) * | 2001-01-26 | 2002-08-09 | Fujitsu Ltd | Repeating installation |
| CN102570591A (en) * | 2012-01-14 | 2012-07-11 | 北京鼎汉技术股份有限公司 | Switching system and switching method for dual-computer hot standby |
| CN203027276U (en) * | 2012-12-10 | 2013-06-26 | 北京交控科技有限公司 | Dual-machine hot standby platform |
| CN104485940A (en) * | 2014-11-20 | 2015-04-01 | 苏州富欣智能交通控制有限公司 | Two-machine hot standby switching circuit |
| CN106254097A (en) * | 2016-07-20 | 2016-12-21 | 浙江众合科技股份有限公司 | A kind of ATS system two-shipper arbitration system judged based on third party and method |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108459496A (en) * | 2018-05-17 | 2018-08-28 | 兰州大成铁路信号有限公司 | Safety Redundancy system for railway signal system |
| CN110716421A (en) * | 2018-07-11 | 2020-01-21 | 兰州大成铁路信号有限公司 | Execution unit switching circuit, electronic execution system comprising same and switching method |
| CN110716422A (en) * | 2018-07-11 | 2020-01-21 | 兰州大成铁路信号有限公司 | Electronic execution unit, electronic execution system comprising same and switching method |
| CN110716421B (en) * | 2018-07-11 | 2023-11-24 | 兰州大成铁路信号股份有限公司 | Execution unit switching circuit, electronic execution system comprising same and switching method |
| CN110532132A (en) * | 2019-03-22 | 2019-12-03 | 合肥工大高科信息科技股份有限公司 | Hot standby server security control method, medium and equipment |
| CN110532132B (en) * | 2019-03-22 | 2022-04-12 | 合肥工大高科信息科技股份有限公司 | Safety control method, medium and equipment for hot standby server |
| CN110968021A (en) * | 2019-12-20 | 2020-04-07 | 上海亨钧科技股份有限公司 | Interlocking machine dual-system switching system and control method |
| CN113410908A (en) * | 2021-06-18 | 2021-09-17 | 卡斯柯信号有限公司 | Driving interface system of single coil relay supporting active-standby driving |
| CN113410908B (en) * | 2021-06-18 | 2022-07-26 | 卡斯柯信号有限公司 | Driving interface system of single-coil relay supporting master and standby driving |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108009056A (en) | A kind of safety computer platform two-node cluster hot backup switching and fault detection system and method | |
| CN101951026B (en) | Double machine measurement and control online main and standby switching method | |
| CN102866353A (en) | Device and method for state detection of main loop relay of direct-current power supply system | |
| CN109278802A (en) | A kind of exchange switch apparatus, system and its control method | |
| CN106571688A (en) | Method for monitoring operation mode of direct-current system and operation states of disconnecting switches | |
| CN101741137B (en) | Network centralized emergency power supply automatic switching method | |
| CN103838222B (en) | Industrial automation control system double are the active-standby switch unit of hot-backup system | |
| CN203368127U (en) | Spare power automatic switching control equipment for transformer substation network | |
| CN202617154U (en) | Train communication system | |
| CN201174618Y (en) | Fast switching control apparatus for micro-computer electric power | |
| CN106093683B (en) | Heater broken wire detection system and wire break detection method | |
| CN207623963U (en) | A kind of safety computer platform two-node cluster hot backup switching and fault detection system | |
| CN201829929U (en) | Novel hard trip loop for large-scale thermal power unit MFT (main fuel trip) | |
| CN202435052U (en) | Wind power converter loop control circuit | |
| CN207304150U (en) | Secondary equipment in power system dual power supply comprehensive management apparatus | |
| CN110854839A (en) | Power supply system for monitoring system and asymmetric load fault diagnosis method | |
| CN103856338A (en) | Automatic bypass device and method for tandem connection of communication device | |
| CN103414247B (en) | The control of returning of multiple-circuit line transmission system coordinates switched system and changing method | |
| CN206023359U (en) | A kind of standby power switching device | |
| CN215108294U (en) | Platform door central control system | |
| CN204794329U (en) | Single -phase electric dual supply automatic switching control equipment | |
| CN213875872U (en) | Regional backup power switching verification auxiliary device | |
| CN103728529B (en) | A kind of switch gap condition discrimination method | |
| CN204794328U (en) | Three -phase electricity dual supply automatic switching control equipment | |
| CN109066604B (en) | Generator low-voltage protection system of million-kilowatt nuclear power station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180508 |
|
| RJ01 | Rejection of invention patent application after publication |