CN107783525A - DI dynamic diagnosis circuits based on FPGA - Google Patents
DI dynamic diagnosis circuits based on FPGA Download PDFInfo
- Publication number
- CN107783525A CN107783525A CN201711173124.XA CN201711173124A CN107783525A CN 107783525 A CN107783525 A CN 107783525A CN 201711173124 A CN201711173124 A CN 201711173124A CN 107783525 A CN107783525 A CN 107783525A
- Authority
- CN
- China
- Prior art keywords
- optocoupler
- master controller
- controlling switch
- out detection
- burn out
- 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
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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
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/4184—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by fault tolerance, reliability of production system
-
- 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
-
- 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
- G01R31/58—Testing of lines, cables or conductors
-
- 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
-
- 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
- G05B2219/25—Pc structure of the system
- G05B2219/25232—DCS, distributed control system, decentralised control unit
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
A kind of DI dynamic diagnosis circuits based on FPGA, are related to signal diagnostic techniques field, and what is solved is the technical problem for reducing diagnostic error rate.The circuit includes master controller, sampling optocoupler, burn out detection optocoupler, switching relay, the first controlling switch, the second controlling switch；The master controller is fpga chip, and master controller is by the first controlling switch, the second controlling switch, the cooperation for switching relay, to control the input side signal of sampling optocoupler and burn out detection optocoupler；Master controller realizes the dynamic diagnosis to DI passages by sampling the outlet side signal of optocoupler and burn out detection optocoupler.Circuit provided by the invention, system is protected suitable for the control object in DCS fields.
Description
Technical field
The present invention relates to signal diagnostic techniques, more particularly to a kind of technology of the DI dynamic diagnosis circuits based on FPGA.
Background technology
In DCS（Dcs）Field, some equipment need to realize the protection to control object, such as steam turbine
Chaser is protected, and this protection system needs to determine to be according to the data signal state of protected object when performing safeguard protection
No execution safety precautions（Such as steam turbine chaser）.
Performing chaser action in actual applications means gross mistake or failure occur, therefore scene is except regular
Trip event will not typically occur during experiment, that is this is used to judge whether that the data signal of chaser is chronically at a kind of shape
State, it is long-term to keep high level or low level state, as equipment in itself if not having diagnostic circuit, really there is chaser signal
DI passages cannot be ensured whether also in normal operating conditions during input.So as to perform safety precautions, this right and wrong
Often dangerous.This DI passage for requiring to perform security function must periodically perform self diagnosis, and this diagnosis can be known
Do not go out the locked of DI passages（stuck at）Failure.But existing diagnostic mode is all the software diagnosis mode that uses, diagnosis is wrong
Rate is higher by mistake, and the diagnosis coverage rate of passage is relatively low, can not realize and DI passages are comprehensively detected, and can not also detect cable
Disconnection fault.
The content of the invention
For defect present in above-mentioned prior art, the technical problems to be solved by the invention are to provide a kind of detection letter
Number can dynamic change, the locked failure of signal can be detected, and diagnostic error rate is low, the diagnosis coverage rate of passage it is high based on
FPGA DI dynamic diagnosis circuits.
In order to solve the above-mentioned technical problem, a kind of DI dynamic diagnosis circuits based on FPGA provided by the present invention, it is special
Sign is：Opened including master controller, sampling optocoupler, burn out detection optocoupler, switching relay, the first controlling switch, the second control
Close；
The master controller is fpga chip, and the sampled signal output of master controller terminates to the control terminal of the first controlling switch,
The switching signal output of master controller terminates to the control terminal of the second controlling switch；
The switching relay is that single-pole double throw is connected to after relay, the control coil for switching relay by the second controlling switch
Power supply, switches the movable contact ground connection of relay, and the first stationary contact for switching relay is connected to sampled light by the first controlling switch
The input side negative terminal of coupling, the second stationary contact for switching relay concatenate a burn out detection resistance to the input side of burn out detection optocoupler
Negative terminal；
The input side anode of the sampling optocoupler concatenates a pressure drop pipe to positive supply, and the input side negative terminal for sampling optocoupler is connected to broken string
The input side negative terminal of optocoupler is detected, the outlet side for sampling optocoupler just terminates to positive supply, and the outlet side negative terminal for sampling optocoupler is connected to
The pumping signal input of master controller；
The input side of the burn out detection optocoupler just terminates to positive supply, and the outlet side negative terminal of burn out detection optocoupler is connected to main control
The disconnection signal input of device.
DI dynamic diagnosis circuits provided by the invention based on FPGA, the diagnosis of DI passages are realized based on FPGA, FPGA is
Hardware mode operation will not produce the common mistake of software, have the characteristics of diagnostic error rate is low, and pumping signal is led in DI
Added on the outside of road, all problems that can be diagnosed to be on whole DI passages, moreover it is possible to External cable broken string diagnosis is realized, in outer lines
Cable can be detected at once when breaking, and the diagnosis coverage rate of passage is higher.
Brief description of the drawings
Fig. 1 is the circuit diagram of the DI dynamic diagnosis circuits based on FPGA of the embodiment of the present invention.
Embodiment
Embodiments of the invention are described in further detail below in conjunction with brief description of the drawings, but the present embodiment is not used to limit
The system present invention, every similar structure using the present invention and its similar change, all should be included in protection scope of the present invention, the present invention
In pause mark represent the relation of sum.
As shown in figure 1, a kind of DI dynamic diagnosis circuits based on FPGA that the embodiment of the present invention is provided, its feature exist
In：Including master controller U1, sampling optocoupler G1, burn out detection optocoupler G2, switching relay J1, the first controlling switch Q1, second
Controlling switch Q2；
The master controller U1 is fpga chip, and the sampled signal output of master controller terminates to the first controlling switch Q1 control
End, master controller U1 switching signal output terminate to the second controlling switch Q2 control terminal；
The switching relay J1 is that single-pole double throw passes through the second controlling switch Q2 after relay, the control coil for switching relay
Power supply is connected to, switches the movable contact ground connection of relay, the first stationary contact for switching relay is connected to by the first controlling switch Q1
Optocoupler G1 input side negative terminal is sampled, the second stationary contact for switching relay concatenates a burn out detection resistance R1 to burn out detection light
Coupling G2 input side negative terminal；
The input side anode of the sampling optocoupler G1 concatenates a pressure drop pipe D1 and connect to positive supply, sampling optocoupler G1 input side negative terminal
To burn out detection optocoupler G2 input side negative terminal, sampling optocoupler G1 outlet side just terminates to positive supply, and sampling optocoupler G1's is defeated
Go out the pumping signal input that side negative terminal is connected to master controller U1；
The input side of the burn out detection optocoupler G2 just terminates to positive supply, and burn out detection optocoupler G2 outlet side negative terminal is connected to master
Controller U1 disconnection signal input.
The operation principle of the embodiment of the present invention is as follows：
Master controller U1 controls the J1 actions of switching relay by the second controlling switch Q2, when switching relay J1 movable contact
When being closed with the first stationary contact, master controller U1 enters passage diagnostic state, when the movable contact and second that switch relay J1 are quiet
During contact closure, master controller U1 enters non-passage diagnostic state；
Under Air conduct measurement state（Fixed cycle enters, and such as every 2 hours once）, master controller U1 generation driving pulses, this arteries and veins
Punching is not simple square wave, but the waveform of distinctive length interval and binary digit implication, this Pulse Width Control first control
The break-make for switching Q1 produces the excitation of DI passages, swashs so as to receive this by sampling optocoupler G1 and master controller U1
Signal is encouraged, during this period, outside scene switch N1 and burn out detection resistance R1 is disconnected and is isolated, and DI passages are not responding to outside defeated
Enter signal, avoid interference of the external signal to diagnosis.
Under non-Air conduct measurement state, by DI passages connect pressure drop pipe D1 lifting DI passages cut-in voltage, with
Burn out detection optocoupler G2 cut-in voltage produces difference, under normal circumstances because burn out detection resistance R1 presence, broken string inspection
Light-metering coupling G2 is constantly in conducting state, and when outside scene switch N1 disconnects, burn out detection optocoupler G2 can just end, this
When may determine that cable fault, normal DI passages during this are because pressure drop pipe D1 presence will not open, unless outside
Closed action, which occurs, for scene switch N1 can just turn on, so as to sample switch motion.
Claims (1)
- A kind of 1. DI dynamic diagnosis circuits based on FPGA, it is characterised in that：Including master controller, sampling optocoupler, burn out detection Optocoupler, switching relay, the first controlling switch, the second controlling switch；The master controller is fpga chip, and the sampled signal output of master controller terminates to the control terminal of the first controlling switch, The switching signal output of master controller terminates to the control terminal of the second controlling switch；The switching relay is that single-pole double throw is connected to after relay, the control coil for switching relay by the second controlling switch Power supply, switches the movable contact ground connection of relay, and the first stationary contact for switching relay is connected to sampled light by the first controlling switch The input side negative terminal of coupling, the second stationary contact for switching relay concatenate a burn out detection resistance to the input side of burn out detection optocoupler Negative terminal；The input side anode of the sampling optocoupler concatenates a pressure drop pipe to positive supply, and the input side negative terminal for sampling optocoupler is connected to broken string The input side negative terminal of optocoupler is detected, the outlet side for sampling optocoupler just terminates to positive supply, and the outlet side negative terminal for sampling optocoupler is connected to The pumping signal input of master controller；The input side of the burn out detection optocoupler just terminates to positive supply, and the outlet side negative terminal of burn out detection optocoupler is connected to main control The disconnection signal input of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173124.XA CN107783525A (en) | 2017-11-22 | 2017-11-22 | DI dynamic diagnosis circuits based on FPGA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173124.XA CN107783525A (en) | 2017-11-22 | 2017-11-22 | DI dynamic diagnosis circuits based on FPGA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107783525A true CN107783525A (en) | 2018-03-09 |
Family
ID=61430513
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711173124.XA Pending CN107783525A (en) | 2017-11-22 | 2017-11-22 | DI dynamic diagnosis circuits based on FPGA |
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| Country | Link |
|---|---|
| CN (1) | CN107783525A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111813088A (en) * | 2020-07-16 | 2020-10-23 | 国核自仪系统工程有限公司 | DI channel diagnostic circuit and method |
| JP2022510835A (en) * | 2018-11-30 | 2022-01-28 | ヴァレオ、シーメンス、イーオートモーティブ、ジャーマニー、ゲーエムベーハー | Monitoring circuits for interlock systems, interlock systems, assemblies with interlock systems and functional units, and methods of operating interlock systems. |
| WO2023207279A1 (en) * | 2022-04-24 | 2023-11-02 | 南京科远智慧科技集团股份有限公司 | Disconnection diagnosis apparatus and method for digital quantity output loop |
-
2017
- 2017-11-22 CN CN201711173124.XA patent/CN107783525A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2022510835A (en) * | 2018-11-30 | 2022-01-28 | ヴァレオ、シーメンス、イーオートモーティブ、ジャーマニー、ゲーエムベーハー | Monitoring circuits for interlock systems, interlock systems, assemblies with interlock systems and functional units, and methods of operating interlock systems. |
| CN111813088A (en) * | 2020-07-16 | 2020-10-23 | 国核自仪系统工程有限公司 | DI channel diagnostic circuit and method |
| CN111813088B (en) * | 2020-07-16 | 2021-10-01 | 国核自仪系统工程有限公司 | DI channel diagnostic circuit and method |
| WO2023207279A1 (en) * | 2022-04-24 | 2023-11-02 | 南京科远智慧科技集团股份有限公司 | Disconnection diagnosis apparatus and method for digital quantity output loop |
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