CN203067090U - Switching value signal acquisition circuit for diesel engine safety protection control - Google Patents
Switching value signal acquisition circuit for diesel engine safety protection control Download PDFInfo
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- CN203067090U CN203067090U CN 201220570323 CN201220570323U CN203067090U CN 203067090 U CN203067090 U CN 203067090U CN 201220570323 CN201220570323 CN 201220570323 CN 201220570323 U CN201220570323 U CN 201220570323U CN 203067090 U CN203067090 U CN 203067090U
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- switching value
- value signal
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- diesel engine
- safety protection
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Abstract
The utility model relates to the technical field of diesel engine safety protection control, and discloses a switching value signal acquisition circuit for the diesel engine safety protection control. The switching value signal acquisition circuit is connected with a central processor through a switching value signal transducer fault measuring circuit; the central processor is connected with a basic monitoring system through a switching value signal output circuit and a circuit fault comprehensive alarm circuit; and the central processor is connected with a slave control display module through an RS 485 communication circuit. The switching value signal acquisition circuit for the diesel engine safety protection control can intelligently judge faults of switching value signal transducer measuring, conducts monitoring and alarming on certain switching value signal transducers with judged faults, achieves automatic emergency protection under abnormal conditions of a diesel engine, improves safety, reliability and control accuracy of running of a diesel engine system, and has the advantage of being simple in structure, low in cost, and strong in comprehensive applicability.
Description
[technical field]
The utility model relates to diesel engine security protection technology field, especially relates to the switching value signal acquisition circuit of a kind of diesel engine safety protection control of diesel engine safety protection line fault monitoring.
[background technique]
The various functions of diesel engine safety protection at present adopt discrete device or versatility PLC to realize mostly; though solved diesel engine safe operation problem to a certain extent; but owing to do not possess function such as signal line detecting fault, so combined reliability still needs further to promote.The develop rapidly of domestic economy is widened the application of high-end equipments such as large-scale ocean going vessel and heavy engineering machinery rapidly; power system is also more and more higher as its technical need of core of equipment; domestic with international related specifications requires also more and more stricter, provides more efficient, safer power system safety protection to become requisite constituent element.Because the switching value signal emitter quantity of diesel engine safety protection control system is many; in a single day switching value signal emitter and circuit break down; can cause the safety protection to diesel engine to produce major hidden danger, so there are the measurement determination methods of hidden danger fault in urgent need solution switching value signal emitter and circuit.
[summary of the invention]
For preventing that the problem of hidden danger fault from appearring in diesel engine safety protection control system switching amount signal emitter.The utility model provides a kind of switching value signal acquisition circuit of diesel engine safety protection control; the ability of Boolean value output sensor line fault detecting malfunction alarm be can increase on the basis of conventional diesel engine supervisory system, Security, the reliability of diesel engine system operation significantly improved.That the present invention has is simple in structure, more cheap, the comprehensive applicability of cost is stronger, can satisfy the application of high-speed high-power diesel engine in marine system, improves Security, the reliability of diesel engine operation and safety protection device work.
For achieving the above object, the utility model adopts following technological scheme:
A kind of switching value signal acquisition circuit of diesel engine safety protection control; measuring faulty circuit by the switching value signal emitter links to each other with central processing unit (CPU); central processing unit (CPU) links to each other with basic supervisory system by switching value signal output apparatus, line fault integrated alarm circuit, and passes through the RS485 communicating circuit and link to each other from the control display modular.
A kind of switching value signal acquisition circuit of diesel engine safety protection control, described switching value signal emitter is measured faulty circuit and is formed bleeder circuit by Boolean value output sensor S1 by parallel resistor R1 and main control module internal resistance R2, and signal branch pressure side is connected to operational amplifier D1 inverting input and operational amplifier D2 in-phase input end respectively; The output terminal of operational amplifier D1 and operational amplifier D2 links to each other with central processing unit (CPU) with signal STATE2 by the output terminal STATE1 of photoelectric isolating circuit respectively.
Owing to adopt aforesaid technological scheme, the utlity model has the superiority of following enforcement:
A kind of switching value signal acquisition circuit of diesel engine safety protection control; the ability of Boolean value output sensor line fault detecting malfunction alarm be can increase on the basis of conventional diesel engine supervisory system, Security, the reliability of diesel engine system operation significantly improved.That the present invention has is simple in structure, more cheap, the comprehensive applicability of cost is stronger, can satisfy the application of high-speed high-power diesel engine in marine system, improves Security, the reliability of diesel engine operation and safety protection device work.
[description of drawings]
Fig. 1 is the diesel engine control system structural drawing;
Among the figure: among the figure: 1, basic supervisory system, 2, sensor, 3, diesel engine, 4, the safety protection executive component, 5, the safety protection control system, 6, monitor executive component substantially.
Fig. 2 is Boolean value output sensor principle of measurement skeleton diagram;
Fig. 3 is switching value signal acquisition circuit figure.
[embodiment]
Can explain the utility model in more detail by following embodiment;
As shown in Figure 1, 2, 3, the utility model is to do independent safety protection to use in the other control system of marine diesel oil generator machine.During the diesel engine operation; by monitoring constantly pressure, the temperature of fuel oil/lubricating oil/seawater/fresh water, the running speed of fuel oil/lubricating oil/seawater/fresh water are isoparametric; health status in the time of can making the staff effectively identify the diesel engine operation; by independently safety system is set, further improve Security, the reliability of diesel engine operation in the ocean going vessel.
As accompanying drawing 1 brief overview the framework of whole system; 1～n various kinds of sensors 2 is installed on the diesel engine 3 to be gathered and is transmitted to guarantee all kinds of monitor datas; the data that sensor 2 is gathered comprise that analogue signal (0-5V or 4-20mA)/switching value signal (logic state 0 and 1) enters basic supervisory system 1 respectively and safety protection control system 5 carries out calculation process, require processing result is sent to safety protection executive component 4, monitors executive component 6 substantially and finish system's closed loop control according to applied logic.
Accompanying drawing is used for judging the circuit of switching value signal emitter measurement fault for 2 one kinds, measuring faulty circuit by the switching value signal emitter links to each other with central processing unit (CPU), central processing unit (CPU) links to each other with basic supervisory system by switching value signal output apparatus, line fault integrated alarm circuit, and passes through the RS485 communicating circuit and link to each other from the control display modular.
In the practical application with Boolean value output sensor S1 Out let 10K resistance R 1 in parallel, R1 and main control module internal resistance R2 form bleeder circuit, line segment L1, L2 be sensor to the signal cable between the main control module, this voltage division signal enters operational amplifier D1 inverting input and D2 in-phase input end respectively.R3, R4 compare current potential with D1 and are arranged on 10V, and R7, R8 compare current potential with D2 and be arranged on 2V.D1 inverting input, D2 in-phase input end potential value are 6V when S1 is not closed; When S1 is closed, be 0V; When L1 or L2 conjunction cable appearance interruption, be 12V.Each dotted state of circuit satisfies as following table during real work:
Can know according to last table content, when STATE1=TRUE and STATE2=TRUE, represent that sensor detection circuit is normal and S1 is not closed; When STATE1=TRUE and STATE2=FALSE, represent that sensor detection circuit is normal and S1 is closed; Represent that when STATE1=FALSE interrupting appears in sensor detection circuit.
According to writing SCM program according to above-mentioned Rule of judgment, finally finish functions such as signals collecting, judgement, warning processing, protection driving.
Claims (2)
1. the switching value signal acquisition circuit of a diesel engine safety protection control; it is characterized in that: measure faulty circuit by the switching value signal emitter and link to each other with central processing unit (CPU); central processing unit (CPU) links to each other with basic supervisory system by switching value signal output apparatus, line fault integrated alarm circuit, and passes through the RS485 communicating circuit and link to each other from the control display modular.
2. the switching value signal acquisition circuit of a kind of diesel engine safety protection control as claimed in claim 1, it is characterized in that: described switching value signal emitter is measured faulty circuit and is formed bleeder circuit by Boolean value output sensor S1 by parallel resistor R1 and main control module internal resistance R2, and signal branch pressure side is connected to operational amplifier D1 inverting input and operational amplifier D2 in-phase input end respectively; The output terminal of operational amplifier D1 and operational amplifier D2 links to each other with central processing unit (CPU) with signal STATE2 by the output terminal STATE1 of photoelectric isolating circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570323 CN203067090U (en) | 2012-11-01 | 2012-11-01 | Switching value signal acquisition circuit for diesel engine safety protection control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220570323 CN203067090U (en) | 2012-11-01 | 2012-11-01 | Switching value signal acquisition circuit for diesel engine safety protection control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067090U true CN203067090U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220570323 Expired - Fee Related CN203067090U (en) | 2012-11-01 | 2012-11-01 | Switching value signal acquisition circuit for diesel engine safety protection control |
Country Status (1)
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| CN (1) | CN203067090U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914324A (en) * | 2012-11-01 | 2013-02-06 | 河南柴油机重工有限责任公司 | Method used for judging measuring fault of switching value signal sensor |
| CN105257408A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine monitoring device and method |
| CN105547577A (en) * | 2016-02-03 | 2016-05-04 | 河南柴油机重工有限责任公司 | Signal sampling protection method used for voltage transmitter and protection circuit |
-
2012
- 2012-11-01 CN CN 201220570323 patent/CN203067090U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102914324A (en) * | 2012-11-01 | 2013-02-06 | 河南柴油机重工有限责任公司 | Method used for judging measuring fault of switching value signal sensor |
| CN102914324B (en) * | 2012-11-01 | 2015-02-18 | 河南柴油机重工有限责任公司 | Method used for judging measuring fault of switching value signal sensor |
| CN105257408A (en) * | 2015-10-23 | 2016-01-20 | 河南柴油机重工有限责任公司 | Waste landfill gas engine monitoring device and method |
| CN105547577A (en) * | 2016-02-03 | 2016-05-04 | 河南柴油机重工有限责任公司 | Signal sampling protection method used for voltage transmitter and protection circuit |
| CN105547577B (en) * | 2016-02-03 | 2018-12-07 | 河南柴油机重工有限责任公司 | A kind of signal sampling guard method and protection circuit for pressure transmitter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20151101 |
|
| EXPY | Termination of patent right or utility model |