CN107145103A - The diagnostic device inputted based on digital quantity - Google Patents
The diagnostic device inputted based on digital quantity Download PDFInfo
- Publication number
- CN107145103A CN107145103A CN201710361787.8A CN201710361787A CN107145103A CN 107145103 A CN107145103 A CN 107145103A CN 201710361787 A CN201710361787 A CN 201710361787A CN 107145103 A CN107145103 A CN 107145103A
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- CN
- China
- Prior art keywords
- circuit
- input
- switch
- diagnostic device
- digital quantity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000001052 transient effect Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 230000001629 suppression Effects 0.000 claims description 2
- 238000003745 diagnosis Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 102100031699 Choline transporter-like protein 1 Human genes 0.000 description 1
- 102100035954 Choline transporter-like protein 2 Human genes 0.000 description 1
- 101000940912 Homo sapiens Choline transporter-like protein 1 Proteins 0.000 description 1
- 101000948115 Homo sapiens Choline transporter-like protein 2 Proteins 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004092 self-diagnosis Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
Classifications
-
- 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
- G05B19/0428—Safety, monitoring
-
- 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
- G05B2219/24215—Scada supervisory control and data acquisition
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a kind of diagnostic device inputted based on digital quantity, wherein, including：One input protection circuit, a control chip; the input protection circuit obtains external contact signal; a first switch is connected between two output ends of the input protection circuit, an output end of the input protection circuit is connected with an input of an input channel circuit；It is serially connected between two inputs of the input channel circuit between two diodes, diode described in two and is connected with a second switch；The output end of the input channel circuit connects the control chip；Also there are two control interfaces, control interface described in two connects the first switch, the second switch respectively on the control chip.The present invention does not influence in the state of normal data acquisition in a controlling cycle, has accomplished the self-diagnostic function of hardware input channel, improves the reliability and safety coefficient of the crucial treatment channel of whole hardware.
Description
Technical field
The present invention relates to a kind of diagnostic device, more particularly to a kind of diagnostic device inputted based on digital quantity.
Background technology
In functional safety control system, digital quantity input signal is correctly gathered, and is related to computing and output below, defeated
Entering passage own hardware must be reliable and stable.
Classical control system, has simply accomplished the collection of input data in the prior art, then adds a passage redundancy, and needs
The functional safety control system wanted, will not only accomplish that triple redundance is inputted, and each input channel, and band Hardware self-diagnosis circuit is fixed
Phase detects the quality of input channel own hardware, so as to accomplish to find mistake, Wrong localization, processing mistake is waited at a whole set of mistake
Reason mechanism, whole diagnostic circuit is built with the higher separation original paper of reliability, and normal acquisition passage is not influenceed, with it is minimum into
This, accomplishes optimal diagnosis control strategy.
The content of the invention
It is a kind of with self-diagnostic function to provide the invention discloses a kind of diagnostic device inputted based on digital quantity
Diagnostic device.
The above-mentioned purpose of the present invention is achieved through the following technical solutions：
A kind of diagnostic device inputted based on digital quantity, wherein, including：One input protection circuit, a control chip, the input
Protection circuit obtains and is connected with a first switch between external contact signal, two output ends of the input protection circuit, described
One output end of input protection circuit is connected with an input of an input channel circuit；Two inputs of the input channel circuit
It is serially connected between end between two diodes, diode described in two and is connected with a second switch；The output of the input channel circuit
The end connection control chip；Also there are two control interfaces, control interface described in two connects described respectively on the control chip
First switch, the second switch.
The diagnostic device as described above inputted based on digital quantity, wherein, the first switch, the second switch and institute
State and be connected with the first photoelectric isolating circuit between control chip.
The diagnostic device as described above inputted based on digital quantity, wherein, the input channel circuit and the control core
A filter circuit is connected between piece.
The diagnostic device as described above inputted based on digital quantity, wherein, the filter circuit and input channel electricity
One second photoelectric isolating circuit is provided between road.
The diagnostic device as described above inputted based on digital quantity, wherein, the input protection circuit includes：Two-way transient state
Suppress diode, electric capacity.
The diagnostic device as described above inputted based on digital quantity, wherein, another input of the input channel circuit
One first electronics, a fuse are connected between a power supply.
In summary, by adopting the above-described technical solution, the present invention passes through input protection circuit, control chip, first
The hardware diagnostic circuit of switch, input channel circuit, two diodes, second switch composition, in a controlling cycle, does not influence
In the state of normal data acquisition, accomplish the self-diagnostic function of hardware input channel, improve whole hardware key processing logical
The reliability and safety coefficient in road.
Brief description of the drawings
Fig. 1 is the circuit diagram for the diagnostic device that the present invention is inputted based on digital quantity.
Embodiment
The present invention is described further with reference to the accompanying drawings and examples：
Fig. 1 is the circuit diagram for the diagnostic device that the present invention is inputted based on digital quantity, refers to Fig. 1, one kind is based on digital quantity input
Diagnostic device, wherein, including：One input protection circuit 1, a control chip 4（MCU）, input protection circuit 1 obtains outside tactile
Point signal, is connected with a first switch 5 between two output ends of input protection circuit 1, an output end of input protection circuit 1 with
The input connection of one input channel circuit 2；Two diodes, two 2 are serially connected between two inputs of input channel circuit 2
A second switch 6 is connected between pole pipe；The output end connection control chip 4 of input channel circuit 2；Also have on control chip 4
There are two control interfaces, two control interfaces connect first switch 5, second switch 6 respectively.
Fig. 1 is the circuit diagram for the diagnostic device that the present invention is inputted based on digital quantity, refers to Fig. 1 and is embodied in the present invention
During, being parallel between the two-port of input channel circuit 2 in resistance and triode, and input channel circuit 2 also has two
Pole pipe, during the closure of outside, input circuit can turn on diode of giving out light, so that the other end of isolation is transferred to, three poles in parallel
Pipe amplifying circuit has shunting action, can receive below external contact resistance 1K, can also change circuit configuration parameter to meet
The input requirements of client, the data signal after photoelectric isolating circuit, progress filters out anti-interference, is sent to data processing circuit and enters
Row computing, the whole process hardware reaction time is quick, and using FPGA come acquisition process, speed can reach Microsecond grade.
Further, the present invention implement input circuit diagnosis mode be：MCU is in a major control cycle, hair one
Secondary diagnosis control signal, when external input signal is adopted into being 1, output control signal CTL1 come control electronic switch K1 close,
So input channel is bypassed, and collection signal is changed into 0, and built in diagnostics program thinks that input channel is normal, if collection is still
Right is 1, into error handling mechanism, otherwise when outside does not have contact signal, i.e. open circuit signaling, internal input channel collection
For signal 0, at this moment diagnosis control signal CTL2 works, controlling switch K2 closures, and it is 1, passage that input channel, which collects signal,
Normally, if the signal collected is 0, error handling mechanism is entered.
Diagnostic circuit is so inputted, when external signal is 1 and 0, real-time diagnosis can be accomplished, digital quantity is substantially increased
The security reliability of input channel.
Further, the first photoelectric isolating circuit 8 is connected between first switch 5, second switch 6 and control chip 4.
Further, a filter circuit 3 is connected between input channel circuit 2 and control chip 4.
Further, one second photoelectric isolating circuit 7 is provided between filter circuit 3 and input channel circuit 2.
Further, input protection circuit 1 includes：Two-way Transient Suppression Diode, electric capacity；High pressure, anti-high frequency can be resisted
Electromagnetic interference.
Further, one first electronics, an insurance are connected between another input and a power supply of input channel circuit 2
Silk.
Claims (6)
1. a kind of diagnostic device inputted based on digital quantity, it is characterised in that including：One input protection circuit, a control chip,
One first is connected between the input protection circuit acquisition external contact signal, two output ends of the input protection circuit to open
Close, an output end of the input protection circuit is connected with an input of an input channel circuit；The input channel circuit
Two inputs between be serially connected between two diodes, diode described in two and be connected with a second switch；The input channel electricity
The output end on road connects the control chip；Also there are two control interfaces, control interface described in two is distinguished on the control chip
Connect the first switch, the second switch.
2. the diagnostic device according to claim 1 inputted based on digital quantity, it is characterised in that the first switch, institute
State and the first photoelectric isolating circuit is connected between second switch and the control chip.
3. the diagnostic device according to claim 1 inputted based on digital quantity, it is characterised in that the input channel circuit
A filter circuit is connected between the control chip.
4. the diagnostic device according to claim 3 inputted based on digital quantity, it is characterised in that the filter circuit and institute
State and one second photoelectric isolating circuit is provided between input channel circuit.
5. the diagnostic device according to claim 1 inputted based on digital quantity, it is characterised in that the input protection circuit
Including：Two-way Transient Suppression Diode, electric capacity.
6. the diagnostic device according to claim 1 inputted based on digital quantity, it is characterised in that the input channel circuit
Another input and a power supply between be connected with one first electronics, a fuse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710361787.8A CN107145103A (en) | 2017-05-22 | 2017-05-22 | The diagnostic device inputted based on digital quantity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710361787.8A CN107145103A (en) | 2017-05-22 | 2017-05-22 | The diagnostic device inputted based on digital quantity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107145103A true CN107145103A (en) | 2017-09-08 |
Family
ID=59778311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710361787.8A Pending CN107145103A (en) | 2017-05-22 | 2017-05-22 | The diagnostic device inputted based on digital quantity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107145103A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05227643A (en) * | 1992-02-13 | 1993-09-03 | Mitsubishi Electric Corp | Digital output circuit |
| JPH0678029A (en) * | 1992-08-26 | 1994-03-18 | Nec Corp | Medium connecting device |
| KR20000045133A (en) * | 1998-12-30 | 2000-07-15 | 구자영 | Method and circuit for diagnosing fault in multi-functional hardware |
| CN200956200Y (en) * | 2006-09-13 | 2007-10-03 | 谢步明 | MVB based distributed digital collecting module |
| CN202093391U (en) * | 2011-06-27 | 2011-12-28 | 北京日立控制系统有限公司 | Multifunctional digital signal input card |
| CN106291167A (en) * | 2016-07-26 | 2017-01-04 | 北京安控科技股份有限公司 | A kind of one takes a functional safety digital quantity input module adding diagnosis |
| CN206805224U (en) * | 2017-05-22 | 2017-12-26 | 上海自动化仪表有限公司 | Diagnostic device based on digital quantity input |
-
2017
- 2017-05-22 CN CN201710361787.8A patent/CN107145103A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05227643A (en) * | 1992-02-13 | 1993-09-03 | Mitsubishi Electric Corp | Digital output circuit |
| JPH0678029A (en) * | 1992-08-26 | 1994-03-18 | Nec Corp | Medium connecting device |
| KR20000045133A (en) * | 1998-12-30 | 2000-07-15 | 구자영 | Method and circuit for diagnosing fault in multi-functional hardware |
| CN200956200Y (en) * | 2006-09-13 | 2007-10-03 | 谢步明 | MVB based distributed digital collecting module |
| CN202093391U (en) * | 2011-06-27 | 2011-12-28 | 北京日立控制系统有限公司 | Multifunctional digital signal input card |
| CN106291167A (en) * | 2016-07-26 | 2017-01-04 | 北京安控科技股份有限公司 | A kind of one takes a functional safety digital quantity input module adding diagnosis |
| CN206805224U (en) * | 2017-05-22 | 2017-12-26 | 上海自动化仪表有限公司 | Diagnostic device based on digital quantity input |
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