CN103293949B - Output switch parameter passage redundant fault-tolerant control method and Redundanter schalter amount output channel - Google Patents
Output switch parameter passage redundant fault-tolerant control method and Redundanter schalter amount output channel Download PDFInfo
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Abstract
This application discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises: the input end of described output switch parameter passage receives the control signal that FPGA sends, described control signal is carried out process and obtain output signal, described output signal is each via the direct parallel redundancy of diode; Described output switch parameter passage by self-inspection retaking of a year or grade mode, judges described output switch parameter channel interior or outside whether fault; Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.The method passes through three independently Redundanter schalter amount output channels, has degraded mode, and by self-inspection retaking of a year or grade mechanism, effectively judges channel interior or external fault, ensured the stability of operational process.The invention also discloses a kind of Redundanter schalter amount output channel, greatly improve the fault-tolerant ability of whole system.
Description
Technical field
The present invention relates to redundancy fault-tolerant control technology field, in particular, relate to a kind of output switch parameter passage redundant fault-tolerant control method and Redundanter schalter amount output channel.
Background technology
At present, DCS (DistributedControlSystem, scattered control system) i.e. Distributed Control System (DCS), be widely used in oil, electric power, the automation control area such as chemical industry, iron and steel, cement, manufacture, water treatment, it is one, and what be made up of process control level and process monitoring level take communication network as the multi-level computer system of tie, combine the 4C technology such as computing machine, communication, display and control, its basic thought is decentralised control, centralized operation, differentiated control, flexible configuration and configuration convenience etc.
Along with the development of computer technology and the application in automatic field thereof, there is the DEH (DigitalElectro-HydraulicControlSystem based on digital machine, digital electro-hydraulic control system), being called for short numeral electricity to adjust, is the important component part of DCS.In DCS system, most importantly the redundancy fault-tolerant of switching value controls, and prior art breaker in middle amount output channel redundant fashion has two kinds: a, two Redundanter schalter amount output channel, is selected or low mode of selecting exports by height; B, triple redundance output switch parameter passage, the three two voting mechanism of getting of employing export.For the triplex level redundancy switching value output module for DCS system, comprise three independently output modules, all with three of system independently controller be connected, receive the instruction and data that controller transmits, and the output of switching value is carried out according to instruction and data, the output of three output modules is finally input in terminal module, carries out by terminal module the selection that three select two, thus driving circuit drive operation.Common two Redundanter schalter amount output channels, when a passage breaks down, make voting circuit be difficult to judge, data output can only be carried out by high choosing or low mode of selecting, as long as namely have a channel failure in dual redundant, it may be exactly incorrect that data export, although the voting mechanism of two is got in triple redundance output switch parameter passage employing three, greatly provide the correctness exporting data, when two passages break down, system, by failure to the safe side, cannot ensure the stability of operational process.
Therefore, provide a kind of output switch parameter passage redundant fault-tolerant control method and Redundanter schalter amount output channel, effectively to judge channel interior or external fault, ensureing the stability of operational process, is those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In view of this, the invention provides a kind of output switch parameter passage redundant fault-tolerant control method and Redundanter schalter amount output channel, to overcome due to when two passages break down in prior art, system, by failure to the safe side, cannot ensure the problem of the stability of operational process.
For achieving the above object, the invention provides following technical scheme:
A kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises:
The input end of described output switch parameter passage receives the control signal that FPGA sends, and described control signal is carried out process and obtain and output signal, described output signal is each via the direct parallel redundancy of diode;
Described output switch parameter passage is by self-inspection retaking of a year or grade mode, judge described output switch parameter channel interior or outside whether fault, describedly judge that the concrete mode of internal fault or external fault comprises by self-inspection retaking of a year or grade mode: by comparing retaking of a year or grade value and whether input value is inconsistent, the fault in the whole loop of self-inspection, wherein, described retaking of a year or grade value is the read back waveform reporting FPGA, and described input value is the control signal that FPGA sends;
Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.
Wherein, described degraded mode is 3-2-1-0 degraded mode.
Wherein, described 3-2-1-0 degraded mode is specially: described triple redundance output switch parameter passage is directly in parallel, then realizes 3 fall 2 when one of them channel failure does not export; Then realize 2 when wherein two channel failures do not export and fall 1; Then realize 1 when three passage simultaneous faultss do not export and fall 0.
The present invention is on the basis of above-mentioned disclosed a kind of output switch parameter passage redundant fault-tolerant control method, also disclose a kind of Redundanter schalter amount output channel, be applied to deh control system module triple redundance output switch parameter passage, this Redundanter schalter amount output channel comprises: three separate output switch parameter passages, the output terminal of described output switch parameter passage is respectively by the diode directly in parallel and output switch parameter end that is connected with one end of described diode, described output switch parameter passage is by self-inspection retaking of a year or grade mode, judge described output switch parameter channel interior or outside whether fault, describedly judge that the concrete mode of internal fault or external fault comprises by self-inspection retaking of a year or grade mode: by comparing retaking of a year or grade value and whether input value is inconsistent, the fault in the whole loop of self-inspection, wherein, described retaking of a year or grade value is the read back waveform reporting FPGA, described input value is the control signal that FPGA sends.
Wherein, the circuit of described output switch parameter passage comprises: feed circuit, the output circuit be connected with described feed circuit and the read back circuit be connected with output circuit with described feed circuit, wherein,
Described feed circuit comprise switch triode Q1, provide the first resistance R0 of base current for described switch triode Q1, the second resistance R that resistance is identical when described switch triode Q1 conducting and the 3rd resistance R1 dividing potential drop, for metal-oxide-semiconductor M1 provides grid voltage, make described metal-oxide-semiconductor M1 conducting;
Described output circuit comprises two node S1 and S2, counnter attack diode D1 and the clamp diode D2 of relay; Described S1 is for often to open node, and described S2 is normally closed node, described counnter attack diode D1 and clamp diode D2 for ensure export on the occasion of;
Described read back circuit comprises optocoupler U1, phase inverter, current-limiting resistance R2 and current-limiting resistance R3 and pull-up resistor R4, and described current-limiting resistance R3 provides electric current for described optocoupler U1, makes described optocoupler U1 conducting.
Preferably, the circuit of described output switch parameter passage also comprises: when there is short trouble, fuses the resettable fuse F1 protecting described output switch parameter passage.
Known via above-mentioned technical scheme, compared with prior art, the invention discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises: the input end of described output switch parameter passage receives the control signal that FPGA sends, described control signal is carried out process and obtain output signal, described output signal is each via the direct parallel redundancy of diode; Described output switch parameter passage by self-inspection retaking of a year or grade mode, judges described output switch parameter channel interior or outside whether fault; Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.The method passes through three independently Redundanter schalter amount output channels, has degraded mode, and by self-inspection retaking of a year or grade mechanism, effectively judges channel interior or external fault, ensured the stability of operational process.The invention also discloses a kind of Redundanter schalter amount output channel, its output terminal by the direct parallel redundancy of diode, and passes through degraded mode, thus greatly improves the fault-tolerant ability of whole system.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The process flow diagram of Fig. 1 a kind of output switch parameter passage redundant fault-tolerant control method disclosed in the embodiment of the present invention;
The structural representation of Fig. 2 a kind of Redundanter schalter amount output channel disclosed in the embodiment of the present invention;
Fig. 3 is output switch parameter channel circuit hardware block diagram disclosed in the embodiment of the present invention;
Fig. 4 is output switch parameter channel circuit schematic diagram disclosed in the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises: the input end of described output switch parameter passage receives the control signal that FPGA sends, described control signal is carried out process and obtain output signal, described output signal is each via the direct parallel redundancy of diode; Described output switch parameter passage by self-inspection retaking of a year or grade mode, judges described output switch parameter channel interior or outside whether fault; Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.The method passes through three independently Redundanter schalter amount output channels, has degraded mode, and by self-inspection retaking of a year or grade mechanism, effectively judges channel interior or external fault, ensured the stability of operational process.The invention also discloses a kind of Redundanter schalter amount output channel, its output terminal by the direct parallel redundancy of diode, and passes through degraded mode, thus greatly improves the fault-tolerant ability of whole system.
Refer to accompanying drawing 1, for the embodiment of the present invention discloses a kind of process flow diagram of output switch parameter passage redundant fault-tolerant control method.The embodiment of the invention discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method step specifically comprises:
Step 101: the input end of output switch parameter passage receives the control signal that FPGA sends, carries out process and obtains and output signal, output signal each via the direct parallel redundancy of diode by control signal.
Step 102: output switch parameter passage by self-inspection retaking of a year or grade mode, judges output switch parameter channel interior or outside whether fault.
Concrete, self-inspection retaking of a year or grade mode judges the concrete mode of internal fault or external fault:
1. comparing by retaking of a year or grade and output state, can the fault in the whole loop of self-inspection, as long as occur inconsistent, no matter be channel interior fault or external fault, all can detect.
2., when just powering on, if when retaking of a year or grade value DO_TEST and input value DO is inconsistent, judge channel interior fault.
If 3. channel interior is normal, then pilot relay S1 closes, and S2 disconnects, and circuit normally works, and when DO_TEST and DO is inconsistent, now turns off S1, and first sense channel inside whether fault, if channel interior normally, then judges external short circuit.
4., when short-circuited outside, intermittent control S1 closes, and judges whether outside recovers normal.
Step 103: pre-set degraded mode, when there being fault to occur, carries out the output of output quantity according to described degraded mode.
Wherein, degraded mode described above is 3-2-1-0 degraded mode.Described 3-2-1-0 degraded mode is specially: described triple redundance output switch parameter passage is directly in parallel, then realizes 3 fall 2 when one of them channel failure does not export; Then realize 2 when wherein two channel failures do not export and fall 1; Then realize 1 when three passage simultaneous faultss do not export and fall 0.
The invention discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises: the input end of described output switch parameter passage receives the control signal that FPGA sends, described control signal is carried out process and obtain output signal, described output signal is each via the direct parallel redundancy of diode; Described output switch parameter passage by self-inspection retaking of a year or grade mode, judges described output switch parameter channel interior or outside whether fault; Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.The method passes through three independently Redundanter schalter amount output channels, has degraded mode, and by self-inspection retaking of a year or grade mechanism, effectively judges channel interior or external fault, ensured the stability of operational process.
On the basis of embodiment disclosed in the invention described above, the embodiment of the invention also discloses a kind of Redundanter schalter amount output channel, be applied to deh control system module triple redundance output switch parameter passage, this Redundanter schalter amount output channel comprises: the output terminal of three separate output switch parameter passages 201, described output switch parameter passage 201 is respectively by the diode 202 directly in parallel and output switch parameter end 203 that is connected with one end of described diode 202.Concrete, refer to accompanying drawing 2, a kind of structural representation of Redundanter schalter amount output channel disclosed in the embodiment of the present invention.As shown in Figure 2, three output switch parameter passages are independent separately in three modules, and output terminal, by the direct parallel redundancy of diode, realizes degraded mode, thus greatly improves the fault-tolerant ability of whole system.
Wherein, degraded mode described above is 3-2-1-0 degraded mode.Described 3-2-1-0 degraded mode is specially: described triple redundance output switch parameter passage is directly in parallel, then realizes 3 fall 2 when one of them channel failure does not export; Then realize 2 when wherein two channel failures do not export and fall 1; Then realize 1 when three passage simultaneous faultss do not export and fall 0.
Concrete, refer to accompanying drawing 3, output switch parameter channel circuit hardware block diagram disclosed in the embodiment of the present invention.The circuit of described output switch parameter passage comprises: feed circuit, the output circuit be connected with described feed circuit and the read back circuit be connected with output circuit with described feed circuit, wherein,
Described feed circuit comprise switch triode Q1, R0 provides base current, R and the R1 dividing potential drop that resistance is identical when described switch triode Q1 conducting for described switch triode Q1, for metal-oxide-semiconductor M1 provides grid voltage, makes described metal-oxide-semiconductor M1 conducting; Described output circuit comprises two node S1 and S2, the counnter attack diode D1 of relay and clamp diode D2, described S1 for often to open node, described S2 is normally closed node, described counnter attack diode D1 and clamp diode D2 for ensure to export on the occasion of; Described read back circuit comprises optocoupler U1, phase inverter, current-limiting resistance R2 and current-limiting resistance R3 and pull-up resistor R4, and described current-limiting resistance R3 provides electric current for described optocoupler U1, makes described optocoupler U1 conducting.
Preferably, the circuit of output switch parameter passage described above also comprises: when there is short trouble, fuses the resettable fuse F1 protecting described output switch parameter passage.
When control signal DO is " 1 ", U1 conducting, export " 0 " retaking of a year or grade after phase inverter " 1 ", S1 and S2 is two nodes of relay, and wherein S1 is for often to open node, and S2 is normally closed node, and D1 is counnter attack diode, and D2 is catching diode, ensure export be on the occasion of.
DO is the control signal that FPGA sends, the break-make of control P channel MOS tube M1, when DO is " 1 ", and switch triode Q1 conducting, metal-oxide-semiconductor M1 grid voltage 12V, metal-oxide-semiconductor M1 conducting, when DO is " 0 ", switch triode Q1 turns off, and metal-oxide-semiconductor M1 grid voltage 24V, metal-oxide-semiconductor M1 ends.S1 and S2 is two isolated nodes of same relay, and S1 is for often to open node, and S2 is normally closed node.DOUT is output signal, and DO_TEST is the read back waveform reporting FPGA, and U1 is light-coupled isolation switching channels and read back circuit, and read back circuit is connected with on-board controller part.
In order to prevent the controller portion parallel circuit caused because of passage short trouble from damaging, F1 is resettable fuse, and its contact capacity is 200mA; when there is short trouble; 200mA fuse F1 fuses with protection channel, and after pending fault is got rid of, F1 resettable fuse recovers on-state automatically.
Principle of work: when DO is " 1 ", DO_TEST is " 1 ", and when DO is " 0 ", DO_TEST is " 0 ", and concrete is:
1. when just powering on, relay is failure to actuate, and switch S 1 disconnects, S2 closes, and system exports and departs from because switch S 1 is off state with extraneous, and signal can not export through D1, even if now S1 sticks together fault, because S2 is closure state, export ground connection, by failure to the safe side, do not affect outside output, channel interior whether fault can be judged by retaking of a year or grade value DO_TEST, if passage is normal, then control S1 closes, and S2 disconnects, and circuit normally works.Known by relay characteristic, in small area analysis situation, switch break-before-make.
2. when circuit normally works, relay is failure to actuate, and is responsible for DO and exports, the maximum 200mA of output current by metal-oxide-semiconductor.
3. detect that output and retaking of a year or grade are inconsistent, then control S1 disconnects, and S2 closes.
To its fault analysis: the principle of self-inspection detects channel failure, do not distinguish concrete failure cause, the said external status that do not affect refers under redundant mode below:
1. comparing by retaking of a year or grade and output state, can the fault in the whole loop of self-inspection, as long as occur inconsistent, no matter be channel interior fault or external fault, all can detect.
2., when just powering on, if when retaking of a year or grade value DO_TEST and input value DO is inconsistent, judge channel interior fault.
If 3. channel interior is normal, then pilot relay S1 closes, and S2 disconnects, and circuit normally works, and when DO_TEST and DO is inconsistent, now turns off S1, and first sense channel inside whether fault, if channel interior normally, then judges external short circuit.
4., when short-circuited outside, intermittent control S1 closes, and judges whether outside recovers normal.
Concrete, refer to accompanying drawing 4, output switch parameter channel circuit schematic diagram disclosed in the embodiment of the present invention.Be illustrated in figure 4 DO circuit theory diagrams, DO1 is input control signal, and DO1_OUT is output signal, and DO1_TEST is read back waveform, and DO_K1 is relay control signal.
When input control signal DO1 is " 1 ", Q14 conducting, it is+12V that+24V_DO obtains metal-oxide-semiconductor grid voltage after resistance R810, R811 dividing potential drop, metal-oxide-semiconductor conducting; When just powering on, relay does not work, and this often opens node and disconnects, and normally closed node closes, export and depart from extraneous, do not affect outside output, channel interior whether fault can be judged, if passage is normal by retaking of a year or grade value DO_TEST, then control S1 closes, S2 disconnects, and circuit normally works, and is exported the DO signal of maximum 200mA by metal-oxide-semiconductor.
When input control signal DO is " 0 ", metal-oxide-semiconductor grid voltage is+24V, and metal-oxide-semiconductor ends.K9 is the G6B type low power relay of Omron; there is a separate Lu Changkai, a road normally closed contact; diode D343 protects metal-oxide-semiconductor; prevent because resistance R810 short circuit causes metal-oxide-semiconductor to damage; D130 is counnter attack diode; when multichannel DO redundancy of effort, diode D130 can prevent electric current from pouring in down a chimney.
In sum: the invention discloses a kind of output switch parameter passage redundant fault-tolerant control method, be applied to deh control system module triple redundance output switch parameter passage, the method comprises: the input end of described output switch parameter passage receives the control signal that FPGA sends, described control signal is carried out process and obtain output signal, described output signal is each via the direct parallel redundancy of diode; Described output switch parameter passage by self-inspection retaking of a year or grade mode, judges described output switch parameter channel interior or outside whether fault; Pre-setting degraded mode, when there being fault to occur, carrying out the output of output quantity according to described degraded mode.The method passes through three independently Redundanter schalter amount output channels, has degraded mode, and by self-inspection retaking of a year or grade mechanism, effectively judges channel interior or external fault, ensured the stability of operational process.The invention also discloses a kind of Redundanter schalter amount output channel, its output terminal by the direct parallel redundancy of diode, and passes through degraded mode, thus greatly improves the fault-tolerant ability of whole system.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (4)
1. an output switch parameter passage redundant fault-tolerant control method, is characterized in that, be applied to deh control system module triple redundance output switch parameter passage, the method comprises:
The input end of described output switch parameter passage receives the control signal that FPGA sends, and described control signal is carried out process and obtain and output signal, described output signal is each via the direct parallel redundancy of diode;
Described output switch parameter passage is by self-inspection retaking of a year or grade mode, judge described output switch parameter channel interior or outside whether fault, describedly judge that the concrete mode of internal fault or external fault comprises by self-inspection retaking of a year or grade mode: by comparing retaking of a year or grade value and whether input value is inconsistent, the fault in the whole loop of self-inspection, wherein, described retaking of a year or grade value is the read back waveform reporting FPGA, and described input value is the control signal that FPGA sends;
Pre-set degraded mode, when there being fault to occur, the output of output quantity is carried out according to described degraded mode, described degraded mode is 3-2-1-0 degraded mode, described 3-2-1-0 degraded mode is specially: described triple redundance output switch parameter passage is directly in parallel, then realizes 3 fall 2 when one of them channel failure does not export; Then realize 2 when wherein two channel failures do not export and fall 1; Then realize 1 when three passage simultaneous faultss do not export and fall 0.
2. a Redundanter schalter amount output channel, it is characterized in that, be applied to deh control system module triple redundance output switch parameter passage, this Redundanter schalter amount output channel comprises: three separate output switch parameter passages, the output terminal of described output switch parameter passage is respectively by the diode directly in parallel and output switch parameter end that is connected with one end of described diode, described output switch parameter passage is by self-inspection retaking of a year or grade mode, judge described output switch parameter channel interior or outside whether fault, describedly judge that the concrete mode of internal fault or external fault comprises by self-inspection retaking of a year or grade mode: by comparing retaking of a year or grade value and whether input value is inconsistent, the fault in the whole loop of self-inspection, wherein, described retaking of a year or grade value is the read back waveform reporting FPGA, described input value is the control signal that FPGA sends.
3. Redundanter schalter amount output channel according to claim 2, it is characterized in that, the circuit of described output switch parameter passage comprises: feed circuit, the output circuit be connected with described feed circuit and the read back circuit be connected with output circuit with described feed circuit, wherein
Described feed circuit comprise switch triode Q1, provide the first resistance R0 of base current for described switch triode Q1, the second resistance R that resistance is identical when described switch triode Q1 conducting and the 3rd resistance R1 dividing potential drop, for metal-oxide-semiconductor M1 provides grid voltage, make described metal-oxide-semiconductor M1 conducting;
Described output circuit comprises two node S1 and S2, counnter attack diode D1 and the clamp diode D2 of relay; Described S1 is for often to open node, and described S2 is normally closed node, described counnter attack diode D1 and clamp diode D2 for ensure export on the occasion of;
Described read back circuit comprises optocoupler U1, phase inverter, current-limiting resistance R2 and current-limiting resistance R3 and pull-up resistor R4, and described current-limiting resistance R3 provides electric current for described optocoupler U1, makes described optocoupler U1 conducting.
4. Redundanter schalter amount output channel according to claim 3, is characterized in that, the circuit of described output switch parameter passage also comprises: when there is short trouble, fuses the resettable fuse F1 protecting described output switch parameter passage.
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