CN105974841A - Output control system applied on safe computer - Google Patents
Output control system applied on safe computer Download PDFInfo
- Publication number
- CN105974841A CN105974841A CN201610416706.5A CN201610416706A CN105974841A CN 105974841 A CN105974841 A CN 105974841A CN 201610416706 A CN201610416706 A CN 201610416706A CN 105974841 A CN105974841 A CN 105974841A
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- output
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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
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- 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
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/24—Pc safety
- G05B2219/24182—Redundancy
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Safety Devices In Control Systems (AREA)
- Relay Circuits (AREA)
Abstract
The invention discloses an output control system applied on a safe computer. The output control system comprises a double-coil relay which is provided with a coil A and a coil B. The coil A and the coil B parallelly drive the double-coil relay so that the double-coil relay outputs a signal which is required for driving external equipment. The output control system is furthermore provided with an output control A-series unit and an output control B-series unit which simultaneously output and respectively drive the coil A and the coil B, and a main/standby module which selects one from the output control A-series unit and the output control B-series unit as a main/standby series and performs feedback of a result to the output control A-series unit and the output control B-series unit. The output control system has advantages of greatly improving system reliability, increasing a state detecting mechanism and an alarm mechanism of the relay, and facilitating fault eliminating and maintenance.
Description
Technical field
The present invention relates to industrial control field, particularly relate to be applied to the output control system of fail-safe computer.
Background technology
At the industrial control field that industrial control field is the most safety-related, to its key control unit
Fail-safe computer control system has the highest reliability and security requirement, except selecting the electricity of high reliability
Outside sub-components and parts, various safe and reliable Computer Control Technologies and method are also standby is widely used in computer control
In system processed, output control technology is as one of the key technology of fail-safe computer control system, its safety
The safety and reliability facing toward whole fail-safe computer control system with reliability has extremely important shadow
Ring.
The most commonly used electromagnetic relay control circuit realizes Safety output control, electromagnetism relay at present
Device is a kind of electronic control device, when input quantity reaches certain certain value, and in relay, armature will be in electromagnetic force
The pulling force of return spring is overcome to be drawn to iron core under the effect attracted, thus band movable contact adhesive.When input quantity drops
Low to certain certain value, suction reduces or disappears, and armature will return to original position at the counteracting force of spring,
Movable contact is made to discharge.So adhesive, release, thus reached the purpose of conducting in circuit, cut-out,
I.e. realize the output of control circuit and do not export two states.Electromagnetic relay control circuit has uses low input
Amount controls the ability of highoutput running, it is possible to achieve distant control and Automated condtrol, at relay
Between importation and output unit are divided, moreover it is possible to input and output are carried out coupling isolation, therefore plays in circuit certainly
The effects such as dynamic regulation, safeguard protection, change-over circuit.
For the electromagnetic relay output control circuit that industry is commonly used, its defect existed of lower surface analysis.
Single electromagnetic relay control circuit reliability is relatively low.At industrial control field, except being used for setting
Standby safety has beyond the highest requirement, and equipment dependability is also an extremely important index, limitation
In the factor such as purchase cost and equipment volume, although we have tried one's best when designing a calculating machine control system choosing
Select the device that reliability is higher, but, often the output of the final relay selected and its composition controls electricity
Road can not fully meet the reliability design requirement of system, particularly in the field that some safety are harsh,
Such as track traffic, space flight and aviation, military affairs etc., system can use a lot of means or auxiliary equipment to ensure
The safety of system, the complexity increase of system will result directly in the reduction of reliability, therefore can be to reliability
Be designed with higher requirement, and if still use single electromagnetic relay control circuit, it will it is become
The neck of reliability for whole system.
Additionally electromagnetic relay work itself there is also bigger energy consumption.In industrial control field, as above
Described, in order to ensure output safety and lower control difficulty use electromagnetic relay control circuit to realize more
Output controls, and general industry control system is all large industry equipment or large-scale integrated system, itself
Systematic comparison is huge and interface quantity a lot, and this allows for its relay quantity used increases a lot, thus
It is the hugest that the energy consumption driving relay to produce can become, and in some cases, is likely to become whole system
Energy consumption bottleneck and great burden, be greatly increased difficulty and the enforcement of whole system and the fortune of whole system design
Battalion's cost.
Summary of the invention
The technical problem to be solved is just to provide a kind of output being applied to fail-safe computer and controls system
System, reduces energy consumption, improves the reliability of system.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that one is applied to fail-safe computer
Output control system, including being provided with loop A and the double-wound relay of coil B, described loop A and line
Circle this double-wound relay of B parallel drive, so that its output drives the desired signal of external equipment, is additionally provided with
The output of output simultaneously and respectively driving loop A and coil B controls A system unit and output controls B system unit
And select output to control A system unit and output control B system unit which as principal series/standby system, and will knot
Fruit feeds back to the active-standby switch module of each system.
Preferably, described output controls A system unit/output control B system unit and includes drive control module, root
According to drive control module output control signal produce drive relay voltage signal driving output module with
And adjust the voltage regulator module of concrete output voltage values.
Further, output voltage control after described drive control module receives the output order that upper system provides
Signal VO_CTL=1 processed and regulated voltage signal VO_ADJ=0, then gather relay duty, if relay
Not picking up, then carry out fault alarm, notice carries out Measuring error；If relay effectively picks up, judge the most again
Whether current channel is main channel, if main channel, then keeps output voltage control signal VO_CTL=1 and electricity
Pressure regulation signal VO_ADJ=0, it is ensured that reliably picking up of relay, if being currently standby passage, then output voltage
Control signal VO_CTL=1 and regulated voltage signal VO_ADJ=1, standby is that relay coil enters driving holding shape
State.
Further, described driving output module receives the drive control signal of drive control module output
VO_CTL, as VO_CTL=1, drives the original electricity that output module output can drive relay to work
Pressure signal VO1+/-, now VO1A+/-=USpecified, work as VO_CTL=0, drive output module not export
Driving voltage, now VO1+/-=0.
Further, described voltage regulator module receives the original drive voltage signal driving output module output
VO1+/-, when VO1+/-=0, voltage regulator module not outputting drive voltage, now drive relay work
Actual voltage signal VO2+/-=0；As VO1+/-=USpecified, then continue to judge the VO_ADJ signal of input,
If VO_ADJ=0, then output quota drives the running voltage of relay, now VO2+/-=USpecifiedIf,
VO_ADJ=1, then output drives the relay working voltage kept, now VO2+/-=UKeep。
Further, described relay collect driving voltage VO2A+/-and VO2B+/-after can enter into difference
Duty, if relay energized; would export driving +/-signal, output relay status signal
VO_FD=1；If relay does not picks up, the most do not export for driving the driving +/-signal to external equipment, defeated
Go out relay status signal VO_FD=0.
The technical solution used in the present invention, its advantage is embodied in: 1. the output of binary-channel redundancy controls framework,
Substantially increasing the reliability of system, 2. standby is to enter after relay coil picks up to pick up hold mode, only needs
Wanting low voltage to drive, it is achieved energy-conservation, single relay energy consumption reduces to (UKeep/USpecified)2, due to UKeepThe least
In USpecified, this power consumption is negligible, for whole control circuit, i.e. negligible for passage power consumption, is equal to single-pass
The power consumption in road；3. add relay status detection and alarm mechanism, facilitate trouble shooting to safeguard, controlling
In system, the fault rate of real system can be close to 0.
Accompanying drawing explanation
The invention will be further described with detailed description of the invention below in conjunction with the accompanying drawings:
Fig. 1 is the theory diagram of the present invention；
Fig. 2 controls logic chart for driving；
Fig. 3 is for driving output logic chart；
Fig. 4 is voltage-regulation logic chart；
Fig. 5 is relay work-based logic figure.
Detailed description of the invention
The present invention two takes advantage of two to take explanation as a example by two safety computer platforms in track traffic interlock system is applied
Its principle, two take advantage of and work into two-node cluster hot backup redundancy structure, i.e. A system and B system simultaneously, as long as wherein having one are
Normally, system just can normally work, and two take two decides by vote mechanism for the dual pathways, i.e. only when monosystem internal channel 1
Consistent to the operation result of input information with the processing unit of passage 2, this is could to use this result or enter
Row effectively output.
The present invention is a kind of output control system being applied to fail-safe computer, including being provided with loop A and coil
The double-wound relay module of B, described loop A and coil B parallel drive relay, so that its output is driven
The desired signal of dynamic external equipment, is additionally provided with output simultaneously and drives loop A and the output control of coil B respectively
A system processed unit and output control B system unit and selection export and control A system unit and export control B system list
Unit which as principal series/standby system, and result feeds back to the active-standby switch module of each system.
Its output control principle is as it is shown in figure 1, whole output controls to be controlled together with B system by A system, and two are
Export to drive double-wound relay module coil simultaneously, as long as loop A or coil B have one to be driven,
Relay just can pick up, thus ensures the reliable output of system, and monosystem fault does not interferes with system work, separately
Outward by active-standby switch control module determine who be main channel who be standby passage, principal series relay coil is constantly in
Quota driving condition, it is ensured that reliably picking up of relay, standby is that relay then proceeds to pick up holding after attraction
State, enters energy saver mode.
Output controls system (A/B) by drive control module (A/B), driving conversion module (A/B), driving
Conversion module (A/B), voltage regulator module (A/B), double-wound relay module form.
Drive control module is the center controlling logic, needs to gather activestandby state, output voltage control signal
With voltage adjustment signal, collection relay status etc..
The effect driving output module is that the output control signal be given according to drive control module produces and can drive
The voltage signal of motor type relay.
The effect of voltage regulator module is to adjust concrete output voltage values, so that relay enters different works
Make state.
The effect of relay module is desired signal control signal being converted into and driving external equipment, and reaches
Insulation blocking and the effect of output feedback.A system and B system relay coil parallel drive output relay, only
A road output system is wherein had just can normally to export.
Additionally the active-standby switch control module in figure is two to be the mutual medium of work, be output control circuit just
The often important foundation of work, its effect is by being a ruling, decision-making A system and B system who be principal series who be
Standby system, and result is fed back to each system.
Hereinafter the key signal related in figure is made an explanation.
VO_CTL signal is drive control signal.
VO_ADJ signal is that driving voltage regulates signal.
VO_FD signal is that relay status gathers signal.
VO1+/-signal is original relay drive voltage signal.
VO2+/-signal is actual relay drive voltage signal.
Driving +/-is that external equipment drives signal.
Below each functions of modules is described in detail.
● drive control module
In side circuit, drive control module is mainly by single-chip microcomputer, controller or processor and periphery thereof
Circuit realiration, relates generally to gather activestandby state, gathers relay status, exports control signal, output electricity
Pressure adjusts several major functions such as signal.
As in figure 2 it is shown, basic controlling logic is as follows: drive control module receives the output that upper system provides
Instruction, output voltage control signal VO_CTL=1 and regulated voltage signal VO_ADJ=0, then gather relay
Device duty, if relay does not picks up, then carries out fault alarm, and notice carries out Measuring error；If relay
Device effectively picks up, and judges whether current channel is main channel the most again, if main channel, then keeps output voltage
Control signal VO_CTL=1 and regulated voltage signal VO_ADJ=0, it is ensured that reliably picking up of relay, if
Current is standby passage, then output voltage control signal VO_CTL=1 and regulated voltage signal VO_ADJ=1,
Standby is that relay coil enters driving hold mode, i.e. energy conservation state.During whole driving controls,
State-detection and the activestandby state of relay are detected as persistent loop, if state is varied from, then can enter
Enter different logic branches.
● drive output module
In side circuit, voltage output module is controlled letter by the basic driver circuit realiration such as audion, MOS
Number to the conversion of driving voltage.
As it is shown on figure 3, basic controlling logic is as follows: drive output module to receive drive control module output
Drive control signal VO_CTL, as VO_CTL=1, drives output module output can drive relay
The raw voltage signals VO1+ of work/-, now VO1A+/-=USpecified, work as VO_CTL=0, drive output
Module the most not outputting drive voltage, now VO1+/-=0.
● voltage regulator module
The specific implementation of voltage regulator module has multiple, such as by output voltage control adjustable power supply core
Sheet realization or the switch switching circuit realization using multiple power supplies etc..
As shown in Figure 4, basic controlling logic is as follows: voltage regulator module receives and drives output module output
Original drive voltage signal VO1+/-, when VO1+/-=0, voltage regulator module not outputting drive voltage, now
Actual voltage signal VO2+ of driving relay work/-=0；As VO1+/-=USpecified, then continue to judge input
VO_ADJ signal, if VO_ADJ=0, then output quota drive relay running voltage, now
VO2+/-=USpecifiedIf VO_ADJ=1, then output drives the relay working voltage kept, now
VO2+/-=UKeep。
● double-wound relay module
Double-wound relay module is made up of relay and peripheral circuit, controls interface as final output,
Need driving voltage to convert output and relay status has fed back two major functions.
As it is shown in figure 5, basic controlling logic is as follows: relay collect driving voltage VO2A+/-and
VO2B+/-after can enter into different duties, if relay energized; would export driving +/-signal, defeated
Go out relay status signal VO_FD=1；If relay does not picks up, the most do not export for driving external equipment
Driving +/-signal, output relay status signal VO_FD=0.Driving control circuit is that driving is defeated according to two
Artificial situation and relay status return inspection signal and take the control strategy of correspondence.
It addition, the present invention mainly apply to two take advantage of two take two computer interlock output control system, it is also possible to
The redundant computer at similar framework is applied to export in the system such as control, relay output control.
Claims (6)
1. the output control system being applied to fail-safe computer, it is characterised in that: include being provided with loop A and line
The double-wound relay of circle B, described loop A and coil this double-wound relay of B parallel drive, so that its
Output drives the desired signal of external equipment, is additionally provided with output simultaneously and drives loop A and coil B respectively
Output controls A system unit and output controls B system unit and selects output to control A system unit and output controls
B system unit which as principal series/standby system, and result feeds back to the active-standby switch module of each system.
A kind of output control system being applied to fail-safe computer the most according to claim 1, it is characterised in that:
Described output controls A system unit/output and controls B system unit and include drive control module, according to driving control mould
The output control signal of block produces the driving output module of the voltage signal driving relay and adjusts concrete
The voltage regulator module of output voltage values.
A kind of output control system being applied to fail-safe computer the most according to claim 2, it is characterised in that:
Described drive control module receives output voltage control signal VO_CTL=1 after the output order that upper system provides
With regulated voltage signal VO_ADJ=0, then gather relay duty, if relay does not picks up, then carry out
Fault alarm, notice carries out Measuring error；If relay effectively picks up, judge that whether current channel is the most again
Main channel, if main channel, then keeps output voltage control signal VO_CTL=1 and regulated voltage signal
VO_ADJ=0, it is ensured that reliably picking up of relay, if being currently standby passage, then output voltage control signal
VO_CTL=1 and regulated voltage signal VO_ADJ=1, standby is that relay coil enters driving hold mode.
A kind of output control system being applied to fail-safe computer the most according to claim 3, it is characterised in that:
Described driving output module receives drive control signal VO_CTL of drive control module output, when
During VO_CTL=1, drive output module output to drive raw voltage signals VO1+ that relay works/-,
Now VO1A+/-=USpecified, work as VO_CTL=0, drive output module the most not outputting drive voltage, now
VO1+/-=0.
A kind of output control system being applied to fail-safe computer the most according to claim 4, it is characterised in that:
Described voltage regulator module receive drive output module output original drive voltage signal VO1+/-, when
VO1+/-=0, voltage regulator module not outputting drive voltage, now drive the virtual voltage letter of relay work
Number VO2+/-=0；As VO1+/-=USpecified, then continue to judge the VO_ADJ signal of input, if VO_ADJ=0,
Then output quota drives the running voltage of relay, now VO2+/-=USpecifiedIf, VO_ADJ=1, the most defeated
Go out to drive the relay working voltage kept, now VO2+/-=UKeep。
A kind of output control system being applied to fail-safe computer the most according to claim 5, it is characterised in that:
Described relay collect driving voltage VO2A+/-and VO2B+/-after can enter into different duties, as
Really relay energized then exports driving +/-signal, output relay status signal VO_FD=1；If relay
Do not pick up, the most do not export for driving the driving +/-signal to external equipment, output relay status signal
VO_FD=0.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416706.5A CN105974841B (en) | 2016-06-14 | 2016-06-14 | A kind of output control system applied to fail-safe computer |
| CN201810450475.9A CN108693805B (en) | 2016-06-14 | 2016-06-14 | Safety computer output control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610416706.5A CN105974841B (en) | 2016-06-14 | 2016-06-14 | A kind of output control system applied to fail-safe computer |
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|---|---|---|---|
| CN201810450475.9A Division CN108693805B (en) | 2016-06-14 | 2016-06-14 | Safety computer output control system |
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| Publication Number | Publication Date |
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| CN105974841A true CN105974841A (en) | 2016-09-28 |
| CN105974841B CN105974841B (en) | 2018-08-31 |
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| CN201610416706.5A Active CN105974841B (en) | 2016-06-14 | 2016-06-14 | A kind of output control system applied to fail-safe computer |
| CN201810450475.9A Active CN108693805B (en) | 2016-06-14 | 2016-06-14 | Safety computer output control system |
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Cited By (3)
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| CN110412862A (en) * | 2018-04-27 | 2019-11-05 | 比亚迪股份有限公司 | Computer interlock system and its method for handover control, equipment, storage medium |
| 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 |
| CN110816596A (en) * | 2020-01-10 | 2020-02-21 | 浙江众合科技股份有限公司 | Intelligent interlocking application fault positioning method based on graphs |
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| CN111275994B (en) * | 2020-01-16 | 2021-07-20 | 浙江众合科技股份有限公司 | Signal machine red light control system under interlocking is used |
| CN112650047A (en) * | 2020-12-04 | 2021-04-13 | 北京交大微联科技有限公司 | Relay inverter control circuit, control method and computer interlocking system |
| CN113885306B (en) * | 2021-09-08 | 2024-06-04 | 中国航空工业集团公司西安航空计算技术研究所 | Signal output circuit supporting interchangeability under security architecture |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108693805A (en) | 2018-10-23 |
| CN105974841B (en) | 2018-08-31 |
| CN108693805B (en) | 2020-12-11 |
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