CN106647351A - Redundancy switching circuit - Google Patents
Redundancy switching circuit Download PDFInfo
- Publication number
- CN106647351A CN106647351A CN201610910401.XA CN201610910401A CN106647351A CN 106647351 A CN106647351 A CN 106647351A CN 201610910401 A CN201610910401 A CN 201610910401A CN 106647351 A CN106647351 A CN 106647351A
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- 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
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
Abstract
The invention provides a redundancy switching circuit. The redundancy switching circuit comprises a working device, a standby device, a first detection circuit and a second detection circuit. The working device includes a control circuit. The first detection circuit is connected separately with the working device and the standby device. The second detection circuit is connected separately with the working device and the standby device. The first detection circuit is used for detecting a first logic signal transmitted by the standby device to the working device. The second detection circuit is used for detecting a second logic signal transmitted by the standby device to the working device. The control circuit is for controlling working conditions of the working device and the standby device according to the first logic signal and the second logic signal. The redundancy switching circuit has a self-diagnostic capability, and can diagnose whether a connection circuit between the standby device and the working device is faulty, to avoid production accidents.
Description
Technical field
The present invention relates to redundancy switching circuit technical field of automation, more particularly, it relates to a kind of redundancy switching circuit.
Background technology
Redundancy is a kind of key technology means that current control system is adopted, when certain working equipment of control system
After breaking down or failing, using redundancy, stand-by equipment can be switched to by redundancy switching circuit and be operated, be ensured
The normal operation of system.Using redundancy, can also realize online noiseless between safeguard work equipment and stand-by equipment
Change, the availability for making control system obtains greatly lifting.
In prior art, redundancy switching circuit is to be interconnected in working equipment with stand-by equipment by two holding wires
Together, the control signal port of each equipment is connected to the detection signal port of other side.Working equipment persistently sends fixed frequency
Pulse signal, represent that the equipment is in running order, stand-by equipment is received and do not send after pulse signal pulse signal, represent
The equipment is in stand-by state.
When the connection circuit between stand-by equipment and working equipment breaks down, existing redundancy switching circuit will can be somebody's turn to do
It is working equipment failure that failure is surveyed by mistake, carries out the startup of stand-by equipment.
Because when the connection circuit between stand-by equipment and working equipment breaks down, stand-by equipment can be caused to detect
Less than the pulse signal of working equipment, then the working equipment that stand-by equipment is mistakenly considered now state is caused to be stand-by state, it is standby
Equipment is now changed into working equipment.So just there are two working equipments in system, system output signal can get muddled, cause
Production accident.
The content of the invention
To solve the above problems, the invention provides a kind of redundancy switching circuit, the redundancy switching circuit is examined with self
Whether cutting capacity, the connection circuit that can be diagnosed between stand-by equipment and working equipment breaks down, it is to avoid cause production accident.
For achieving the above object, the present invention provides following technical scheme：
A kind of redundancy switching circuit, the redundancy switching circuit includes：Working equipment, stand-by equipment, the first detection circuit
And second detection circuit；
The working equipment includes control circuit；
The first detection circuit is connected respectively with the working equipment and the stand-by equipment；
The second detection circuit is connected respectively with the working equipment and the stand-by equipment；
Wherein, the first detection circuit is used to detect the first logic that the stand-by equipment sends to the working equipment
Signal；The second detection circuit is used to detect the second logical signal that the stand-by equipment sends to the working equipment；Institute
Control circuit is stated for controlling the working equipment and described according to first logical signal and second logical signal
The working condition of stand-by equipment.
Preferably, in above-mentioned redundancy switching circuit, the working equipment includes：First signal output part, the first signal
Receiving terminal, secondary signal output end and secondary signal receiving terminal；
The stand-by equipment includes：3rd signal output part, the 3rd signal receiving end, the 4th signal output part and the 4th letter
Number receiving terminal；
First signal output part is connected by the described first detection circuit with the 3rd signal receiving end；Described
Three signal output parts are connected by the described first detection circuit with first signal receiving end；The secondary signal output end is led to
Cross the second detection circuit to be connected with the 4th signal receiving end；4th signal output part is detected by described second
Circuit is connected with the secondary signal receiving terminal.
Preferably, in above-mentioned redundancy switching circuit, first signal output part, first signal receiving end, institute
State secondary signal output end, the secondary signal receiving terminal, the 3rd signal output part, the 3rd signal input part, institute
It is I/O pin port to state the 4th signal output part and the 4th signal receiving end.
Preferably, in above-mentioned redundancy switching circuit, the control circuit is used for according to first logical signal and institute
Stating the working condition of the second logical signal control working equipment and the stand-by equipment includes：
When first logical signal is differed with second logical signal, the control circuit controls the work
Equipment keeps working condition, the control circuit to control the stand-by equipment and keep stand-by state.
Preferably, in above-mentioned redundancy switching circuit, the working equipment includes：
Alarm module；
When first logical signal is differed with second logical signal, the control circuit controls the warning
Module is reported to the police.
Preferably, in above-mentioned redundancy switching circuit, the control circuit is used for according to first logical signal and institute
Stating the working condition of the second logical signal control working equipment and the stand-by equipment includes：
When first logical signal is identical with second logical signal, the control circuit is patrolled according to described first
Collect signal or second logical signal controls the switching of the working equipment and the stand-by equipment.
A kind of redundancy switching circuit provided by foregoing description, the present invention, it is standby by the first detection electric circuit inspection
The first logical signal for being sent to working equipment with equipment, and the second detection electric circuit inspection stand-by equipment sends to working equipment
Second logical signal, so by control circuit according to the first logical signal and the second logical signal judge working equipment with it is standby
Whether the connection circuit between equipment breaks down, and realizes the switching between working equipment and stand-by equipment.First detection electricity
Road and the detection circuit that the second detection circuit is two groups of independence, when one of detection electric circuit inspection sets to stand-by equipment to work
The logical signal that preparation is sent is differed to stand-by equipment with another detection electric circuit inspection to the logical signal that working equipment sends
When, control circuit receives two logical signals for differing, it was demonstrated that working equipment still normal work, it is not necessary to switch over,
Now then illustrate that the connection circuit between working equipment and stand-by equipment breaks down, when one of detection electric circuit inspection is to standby
Detect what electric circuit inspection sent to stand-by equipment to working equipment with another to the logical signal that working equipment sends with equipment
When logical signal is identical, control circuit receives two identical logical signals, and now control circuit is believed according to specific logic
Number judge whether switched between working equipment and stand-by equipment.The redundancy switching circuit has OBD ability, can examine
Whether the connection circuit between disconnected stand-by equipment and working equipment breaks down, it is to avoid cause production accident.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is a kind of structural representation of redundancy switching circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of structural representation of working equipment provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is existing superfluous when the connection circuit between stand-by equipment and working equipment breaks down from background technology
It is working equipment failure that remaining switching circuit can by mistake survey the failure, carries out the startup of stand-by equipment.
Because when the connection circuit between stand-by equipment and working equipment breaks down, stand-by equipment can be caused to detect
Less than the pulse signal of working equipment, then the working equipment that stand-by equipment is mistakenly considered now state is caused to be stand-by state, it is standby
Equipment is now changed into working equipment.So just there are two working equipments in system, system output signal can get muddled, cause
Production accident.
In order to solve the above problems, a kind of redundancy switching circuit, the redundancy switching circuit are embodiments provided
Including：Working equipment, stand-by equipment, the first detection circuit and the second detection circuit；
The working equipment includes control circuit；
The first detection circuit is connected respectively with the working equipment and the stand-by equipment；
The second detection circuit is connected respectively with the working equipment and the stand-by equipment；
Wherein, the first detection circuit is used to detect the first logic that the stand-by equipment sends to the working equipment
Signal；The second detection circuit is used to detect the second logical signal that the stand-by equipment sends to the working equipment；Institute
Control circuit is stated for controlling the working equipment and described according to first logical signal and second logical signal
The working condition of stand-by equipment.
A kind of redundancy switching circuit provided by foregoing description, the present invention, it is standby by the first detection electric circuit inspection
The first logical signal for being sent to working equipment with equipment, and the second detection electric circuit inspection stand-by equipment sends to working equipment
Second logical signal, so by control circuit according to the first logical signal and the second logical signal judge working equipment with it is standby
Whether the connection circuit between equipment breaks down, and realizes the switching between working equipment and stand-by equipment.First detection electricity
Road and the detection circuit that the second detection circuit is two groups of independence, when one of detection electric circuit inspection sets to stand-by equipment to work
The logical signal that preparation is sent is differed to stand-by equipment with another detection electric circuit inspection to the logical signal that working equipment sends
When, control circuit receives two logical signals for differing, it was demonstrated that working equipment still normal work, it is not necessary to switch over,
Now then illustrate that the connection circuit between working equipment and stand-by equipment breaks down, when one of detection electric circuit inspection is to standby
Detect what electric circuit inspection sent to stand-by equipment to working equipment with another to the logical signal that working equipment sends with equipment
When logical signal is identical, control circuit receives two identical logical signals, and now control circuit is believed according to specific logic
Number judge whether switched between working equipment and stand-by equipment.
For the more detailed explanation embodiment of the present invention, the embodiment of the present invention is specifically retouched below in conjunction with the accompanying drawings
State.
With reference to Fig. 1, Fig. 1 is a kind of structural representation of redundancy switching circuit provided in an embodiment of the present invention.
The redundancy switching circuit includes：
Working equipment 11, the detection detection circuit 14 of circuit 13 and second of stand-by equipment 12, first.
The working equipment 11 includes control circuit.
It should be noted that in the present invention, working equipment and stand-by equipment are the name of two equipment, that is,
Say, when switching condition is met, stand-by equipment is changed into working equipment, and working equipment is changed into stand-by equipment, therefore is described herein as institute
Working equipment 11 is stated including control circuit, the stand-by equipment 12 is also contains in fact including control circuit.That is, work
Equipment 11 and stand-by equipment 12 all have control circuit.
First detection circuit 13 is connected respectively with working equipment 11 and stand-by equipment 12；Second detection circuit 14 respectively with
Working equipment 11 and stand-by equipment 12 connect.
Wherein, working equipment 11 includes：First signal output part, the first signal receiving end, secondary signal output end and
Binary signal receiving terminal.
Stand-by equipment 12 includes：3rd signal output part, the 3rd signal receiving end, the 4th signal output part and the 4th signal
Receiving terminal.
First signal output part is connected by the described first detection circuit 13 with the 3rd signal receiving end；Described 3rd
Signal output part is connected by the described first detection circuit 13 with first signal receiving end；The secondary signal output end is led to
Cross the second detection circuit 14 to be connected with the 4th signal receiving end；4th signal output part is examined by described second
Slowdown monitoring circuit 14 is connected with the secondary signal receiving terminal.
Wherein, the first detection circuit 13 is used to detect the stand-by equipment 12 sends to the working equipment 11 the
One logical signal；The second detection circuit 14 is used to detect the stand-by equipment 12 sends to the working equipment 11 second
Logical signal；The control circuit is used to be set according to first logical signal and second logical signal control work
For 11 and the working condition of the stand-by equipment 12.
, including two signal receiving ends, two signal output parts are for working equipment 11 and each equipment of stand-by equipment 12
In order to constitute the detection circuit of two groups of independence, stand-by equipment 12 is examined to the logical signal that working equipment 11 sends respectively
Survey, judged by comparing two groups of logical signals.
In embodiments of the present invention, the control circuit is used to be believed according to first logical signal and second logic
The working condition of number control working equipment 11 and the stand-by equipment 12 includes：
When first logical signal is identical with second logical signal, the control circuit is patrolled according to described first
Collect signal or second logical signal controls the switching of the working equipment 11 and the stand-by equipment 12.
That is, when for example under normal circumstances working equipment 11 is in running order, the first signal output part and second
The logical signal of signal output part is " 0 ", the first signal receiving end of working equipment 11 and the logic of secondary signal receiving terminal
Signal is " 1 ".
When the first detection detection circuit 14 of circuit 13 and second detect the 3rd signal output part in stand-by equipment 12 and
When the logical signal of the 4th signal output part is " 0 ", that is to say, that the first signal receiving end and second in working equipment 11
The logical signal of signal receiving end is " 0 ", and now working equipment 11 is switched over stand-by equipment 12, and working equipment 11 stops work
Make, stand-by equipment 12 is started working, and the first signal output part of working equipment 11 and the logical signal of secondary signal output end are equal
For " 1 ".
When the first detection detection circuit 14 of circuit 13 and second detect the 3rd signal output part in stand-by equipment 12 and
When the logical signal of the 4th signal output part is " 1 ", that is to say, that the first signal receiving end and second in working equipment 11
The logical signal of signal receiving end is that " 1 " now working equipment 11 keeps normal condition, stand-by equipment 12 to keep stand-by state, work
The logical signal for making the signal output part of equipment 11 first and secondary signal output end is " 0 ".This is that under normal circumstances, work sets
Standby switch instances between 11 and stand-by equipment 12.
In embodiments of the present invention, the control circuit is used to be believed according to first logical signal and second logic
The working condition of number control working equipment 11 and the stand-by equipment 12 includes：
When first logical signal is differed with second logical signal, the control circuit controls the work
Equipment 11 keeps working condition, the control circuit to control the stand-by equipment 12 and keep stand-by state.
That is, when the connection circuit between working equipment 11 and stand-by equipment 12 breaks down, such as working and setting
The first signal output part in standby 11 breaks down, then the 3rd signal receiving end of stand-by equipment 12 does not just receive work and sets
The logical signal of standby 11 first signal output parts output, is mistakenly considered the damage needs of working equipment 11 and switches over, stand-by equipment 12
In the 3rd signal output part output logic signal be " 0 ", but the secondary signal output end in working equipment 11 is normally exported
Logical signal is " 0 ", and the logical signal that the 4th signal receiving end in stand-by equipment 12 is received also is " 0 ", stand-by equipment 12
In the 4th signal output part output logical signal be " 1 ", now first detection circuit 13 with second detect circuit 14 detect
To logical signal differ, now control circuit control working equipment 11 keeps working condition, control circuit control standby to set
Standby 12 keep stand-by state.
In order to strengthen safety precaution, with reference to Fig. 2, in embodiments of the present invention, the working equipment includes：
Alarm module 21.
It should be noted that in the present invention, working equipment and stand-by equipment are the name of two equipment, that is,
Say, when switching condition is met, stand-by equipment is changed into working equipment, and working equipment is changed into stand-by equipment, therefore is described herein as institute
Working equipment 11 is stated including warning device, the stand-by equipment 12 is also contains in fact including warning device.That is, work
Equipment 11 and stand-by equipment 12 all have warning device.
When first logical signal is differed with second logical signal, the control circuit controls the warning
Module 21 is reported to the police.
That is, when the connection circuit between working equipment 11 and stand-by equipment 12 breaks down, such as working and setting
The first signal output part in standby 11 breaks down, then the 3rd signal receiving end of stand-by equipment 12 does not just receive work and sets
The logical signal of standby 11 first signal output parts output, is mistakenly considered the damage needs of working equipment 11 and switches over, stand-by equipment 12
In the 3rd signal output part output logic signal be " 0 ", but the secondary signal output end in working equipment 11 is normally exported
Logical signal is " 0 ", and the logical signal that the 4th signal receiving end in stand-by equipment 12 is received also is " 0 ", stand-by equipment 12
In the 4th signal output part output logical signal be " 1 ", now first detection circuit 13 with second detect circuit 14 detect
To logical signal differ, now control circuit control warning device 21 reported to the police.
It should be noted that the connection holding wire between working equipment 11 and stand-by equipment 12 is likely to break down,
For example, holding wire is maintained at a certain logic state, it is impossible to carry out the change of logic state.In order to realize that this failure is carried
Front early warning, for example, periodically logic level upset is carried out by working equipment 11 to the output signal of the first signal output part, when
When the logical signal of the first signal receiving end also occurs next state upset, then prove that this group of holding wire does not break down.This
When, the 3rd signal receiving end after output signal of the first signal output part carries out logic level upset, in stand-by equipment 12
Differ with the logical signal of the 4th signal receiving end, at this moment by the output signal of the 3rd signal output part in stand-by equipment 12
Logic level upset is also carried out, the 3rd signal receiving end and the 4th signal receiving end after a period of time in stand-by equipment 12
When logical signal is also differed, control circuit control warning device 21 is reported to the police, if after a period of time in stand-by equipment 12
3rd signal receiving end is identical with the logical signal of the 4th signal receiving end, then recover normal.
In embodiments of the present invention, first signal output part, first signal receiving end, the secondary signal are defeated
Go out end, the secondary signal receiving terminal, the 3rd signal output part, the 3rd signal input part, the 4th signal defeated
It is I/O pin port to go out end and the 4th signal receiving end.
Due to being entered in the form of pulse signal between working equipment and stand-by equipment in existing redundancy switching circuit
Row interaction, but the poor anti jamming capability of pulse signal, and system can judge working condition by accident after pulse signal is interfered, defeated
Go out exception.Therefore in embodiments of the present invention, first signal output part, first signal receiving end, second letter
Number output end, the secondary signal receiving terminal, the 3rd signal output part, the 3rd signal input part, the 4th letter
Number output end and the 4th signal receiving end are I/O pin port, are believed by logic between such working equipment and stand-by equipment
Number interact, strong antijamming capability.
And it is possible to directly can learn that the equipment is working condition or standby by reading the logic state of I/O pin
With state, it is ensured that the speed of redundancy switching.
A kind of redundancy switching circuit provided by foregoing description, the present invention, it is standby by the first detection electric circuit inspection
The first logical signal for being sent to working equipment with equipment, and the second detection electric circuit inspection stand-by equipment sends to working equipment
Second logical signal, so by control circuit according to the first logical signal and the second logical signal judge working equipment with it is standby
Whether the connection circuit between equipment breaks down, and realizes the switching between working equipment and stand-by equipment.First detection electricity
Road and the detection circuit that the second detection circuit is two groups of independence, when one of detection electric circuit inspection sets to stand-by equipment to work
The logical signal that preparation is sent is differed to stand-by equipment with another detection electric circuit inspection to the logical signal that working equipment sends
When, control circuit receives two logical signals for differing, it was demonstrated that working equipment still normal work, it is not necessary to switch over,
Now then illustrate that the connection circuit between working equipment and stand-by equipment breaks down, when one of detection electric circuit inspection is to standby
Detect what electric circuit inspection sent to stand-by equipment to working equipment with another to the logical signal that working equipment sends with equipment
When logical signal is identical, control circuit receives two identical logical signals, and now control circuit is believed according to specific logic
Number judge whether switched between working equipment and stand-by equipment.The redundancy switching circuit has OBD ability, can examine
Whether the connection circuit between disconnected stand-by equipment and working equipment breaks down, it is to avoid cause production accident.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
Various modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, the present invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope for causing.
Claims (6)
1. a kind of redundancy switching circuit, it is characterised in that the redundancy switching circuit includes：Working equipment, stand-by equipment, first
Detection circuit and the second detection circuit；
The working equipment includes control circuit；
The first detection circuit is connected respectively with the working equipment and the stand-by equipment；
The second detection circuit is connected respectively with the working equipment and the stand-by equipment；
Wherein, the first detection circuit is used to detect that the stand-by equipment is believed to the first logic that the working equipment sends
Number；The second detection circuit is used to detect the second logical signal that the stand-by equipment sends to the working equipment；It is described
Control circuit is used to control the working equipment and described standby according to first logical signal and second logical signal
With the working condition of equipment.
2. redundancy switching circuit according to claim 1, it is characterised in that the working equipment includes：First signal is defeated
Go out end, the first signal receiving end, secondary signal output end and secondary signal receiving terminal；
The stand-by equipment includes：3rd signal output part, the 3rd signal receiving end, the 4th signal output part and the 4th signal connect
Receiving end；
First signal output part is connected by the described first detection circuit with the 3rd signal receiving end；3rd letter
Number output end is connected by the described first detection circuit with first signal receiving end；The secondary signal output end passes through institute
State the second detection circuit to be connected with the 4th signal receiving end；4th signal output part is by the described second detection circuit
It is connected with the secondary signal receiving terminal.
3. redundancy switching circuit according to claim 2, it is characterised in that first signal output part, described first
Signal receiving end, the secondary signal output end, the secondary signal receiving terminal, the 3rd signal output part, the described 3rd
Signal input part, the 4th signal output part and the 4th signal receiving end are I/O pin port.
4. redundancy switching circuit according to claim 1, it is characterised in that the control circuit is used for according to described first
Logical signal and second logical signal control the working equipment and the working condition of the stand-by equipment to be included：
When first logical signal is differed with second logical signal, the control circuit controls the working equipment
Working condition, the control circuit is kept to control the stand-by equipment and keep stand-by state.
5. redundancy switching circuit according to claim 4, it is characterised in that the working equipment includes：
Alarm module；
When first logical signal is differed with second logical signal, the control circuit controls the alarm module
Reported to the police.
6. redundancy switching circuit according to claim 4, it is characterised in that the control circuit is used for according to described first
Logical signal and second logical signal control the working equipment and the working condition of the stand-by equipment to be included：
When first logical signal is identical with second logical signal, the control circuit is believed according to first logic
Number or second logical signal control the switching of the working equipment and the stand-by equipment.
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| CN201610910401.XA CN106647351A (en) | 2016-10-19 | 2016-10-19 | Redundancy switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610910401.XA CN106647351A (en) | 2016-10-19 | 2016-10-19 | Redundancy switching circuit |
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| CN106647351A true CN106647351A (en) | 2017-05-10 |
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| CN107404412A (en) * | 2017-09-12 | 2017-11-28 | 浙江中控技术股份有限公司 | A kind of switching method of server, device, system and electronic equipment |
| CN109920370A (en) * | 2019-04-17 | 2019-06-21 | 东莞阿尔泰显示技术有限公司 | A kind of novel LED display screen system backup circuit and its control method |
| CN111261458A (en) * | 2020-03-08 | 2020-06-09 | 陕西航空电气有限责任公司 | Contactor control method adopting non-similar dual processors in aviation power distribution system |
| CN112557752A (en) * | 2020-12-06 | 2021-03-26 | 苏州大学 | Electromagnetic signal monitoring system and computer storage medium |
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Application publication date: 20170510 |