CN203658765U - Control system interlocking protection device based on temperature measurement - Google Patents
Control system interlocking protection device based on temperature measurement Download PDFInfo
- Publication number
- CN203658765U CN203658765U CN201420029626.0U CN201420029626U CN203658765U CN 203658765 U CN203658765 U CN 203658765U CN 201420029626 U CN201420029626 U CN 201420029626U CN 203658765 U CN203658765 U CN 203658765U
- Authority
- CN
- China
- Prior art keywords
- temperature
- effective value
- control system
- default
- value
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Safety Devices In Control Systems (AREA)
Abstract
The utility model discloses a control system interlocking protection device based on temperature measurement. The control system interlocking protection device includes a temperature sensor used for measuring temperature of a device controlled by the control system and outputting measured temperature value to an effective value processing unit; the effective value processing unit used for calculating an effective value of the temperature measured by the temperature sensor and outputting the temperature effective value to an interlocking judgment unit; the interlocking judgment unit used for comparing the temperature effective value with a default effective value and outputting abnormity alarm signals to an alarm device or outputting an interlock cutting protection signal to the control system when the temperature effective value is not smaller than the default effective value. According to the utility model, through setting the measurement temperature effective value, collected data is processed and compared with the default one within the predetermined time when line breakage, short circuit, poor contact or interference of temperature measuring points occur. Data that is identified as fake signals is isolated and processed timely, so that error interlocking protection actions of the control system due to fake signal input can be avoided and system reliability is improved.
Description
Technical field
The utility model belongs to industrial automation technical field, be specifically related to a kind of can effectively improve reliability based on thermometric control system interlock protection device.
Background technology
The temperature survey reliability of main equipment is even more important for the safe operation of whole unit; concern whole unit control system and whether can effectively avoid unnecessary misoperation and whether measured temperature is true and reliable, thereby make control system interlock protection can effectively guarantee the safe and reliable operation of main equipment.It is being perfectly safe of unit that traditional control system interlock protection is considered, and in practical application, more needs the definitely reliable of unit.Take blast furnace blower fan as example; substantially there will not be under normal circumstances the situation that temperature is high; even if really having temperature rising to exceed interlocking action also can shut down; but because the bad killers who but becomes control system such as the opening circuit of temperature point, short circuit, contact, external source interference; directly threatening equipment safety operation; often cause unnecessary mistakenly stop machine, lose huge.
PLC is the industrial control system extensively adopting at present; CPU is wherein the core of whole control system software and hardware; general controller is in the time completing elementary data signal processing; have flexibly and report to the police and process and Quality Codes function; although the control system of each manufacturer production has Quality Codes separately; but what consider is basic safeguard measure, just meets generally basic control requirement, cannot meet the safety requirements of on-the-spot main equipment.In based on thermometric industrial control system interlock protection device; temperature sensor is subject to loose contact, broken string, short circuit or disturbs the quick rising that all can cause the measuring-signals such as resistance; PLC control system all can unavoidablely receive that a glitch causes the output of Concatenate shut-down misoperation signal, indirectly causes equipment malfunction to do the generation of accident.Although control system of the prior art all can adopt the measure of certain protection temperature disturbance, level differs, and result of use is not obvious, and limitation is too large; And in prior art, the signal of temperature point is larger on the impact of control system normal interlocking, is difficult to avoid the interference of glitch to control system.Therefore, this just requires in conjunction with field condition, and control system Optimizing Reconstruction is met to industrial safety, reliable demand of producing to reach.
Utility model content
The purpose of this utility model be to provide a kind of can effectively improve reliability based on thermometric control system interlock protection device.
The purpose of this utility model is achieved in that and comprises temperature sensor, effective value processing unit, chain judging unit, wherein:
Temperature sensor is for measuring the temperature of described control system institute control device, and the temperature of measurement is exported to effective value processing unit;
Effective value processing unit is used for calculating the effective value of the measured temperature of described temperature sensor, and described temperature effective value is exported to chain judging unit;
Chain judging unit is for by described temperature effective value and default effective value comparison, and in the time that temperature effective value is not less than default effective value, output abnormality alerting signal is locked guard signal to control system to warning device and/or outputting cutting disconnection.
Through long-term observation summary with in conjunction with actual tests data, in based on thermometric control system interlock protection device, by the default temperature effective value of measuring, within the filtering time of regulation, the data of temperature sensor collection are carried out to effective value and process rear and default effective value comparison, tell in time the true and false of temperature data according to comparison rule, chain judgement is regarded as because of sensor broken string, short circuit, loose contact or signal disturb the glitch data that cause to carry out very first time isolation warning, avoid in time causing the misoperation of control system interlocking because of glitch input interlock protection device, before occurring, accident allow plant maintenance personnel get involved and carry out fault handling in time, further judge to being judged to be the data of normal signal whether data exceed preset alarm temperature or chain temperature, and export corresponding alerting signal or interlock protection signal to control system, thereby the data that guarantee temperature point are served control system effectively reliably, the shutdown of avoiding mistake interlock protection to cause, reduce the shutdown loss causing thus, effectively improve the reliability of control system institute control device.The utility model passes through setting unit, user can be according to the free parameters of field apparatus situation, the interference of the glitch that can effectively get rid of broken string, short circuit, loose contact, the aging generation of measuring point to control system stable operation, and can also, according to the requirement of different control system and actual conditions set temperature effective value and filtering time, there is good versatility.
Accompanying drawing explanation
Fig. 1 is the utility model theory structure schematic diagram;
In figure: 1-temperature sensor, 2-effective value processing unit, the chain judging unit of 3-, 4-setting unit, 5-pre-process unit, 6-anomaly alarming device, 7-control system;
Fig. 2 is the utility model typical workflow schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described, but never in any form the utility model is limited, any conversion or the replacement done based on the utility model training centre, all belong to protection domain of the present utility model.
As shown in attached Fig. 1 and 2, interlock protection device described in the utility model comprises temperature sensor 1, effective value processing unit 2, chain judging unit 3, wherein:
Temperature sensor 1 is for measuring the temperature of described control system institute control device, and the temperature of measurement is exported to effective value processing unit 2;
Effective value processing unit 2 is for calculating the effective value of described temperature sensor 1 measured temperature, and described temperature effective value is exported to chain judging unit 3;
Described effective value processing unit 2 is that the maximum measured temperature of inputting within the default filtering time is measured the difference of temperature as the effective value of measurement temperature with minimum.
The utility model also comprises setting unit 4, described setting unit 4 is connected with effective value processing unit 2 and/or chain judging unit 3 signals, for the default filtering time of described effective value processing unit 2 and/or the default effective value of chain judging unit 3, preset alarm value and default linkage value are set.
Described chain judging unit 3 is in the time that temperature effective value is less than default effective value; output signal to effective value processing unit 2; undressed measurement temperature is directly exported to chain judging unit 3 by effective value processing unit 2; described chain judging unit 3 is by measurement temperature and preset alarm value and the default linkage value comparison of input; in the time that measurement temperature is greater than preset alarm value or default linkage value, export corresponding alerting signal or interlock protection signal to control system.
Temperature effective value and undressed measurement temperature value after calculating are together exported to chain judging unit 3 by described effective value processing unit 2.
Described chain judging unit 3 is in the time that temperature effective value is less than default effective value; directly by undressed measurement temperature value and preset alarm value and default linkage value comparison; in the time that measurement temperature value is greater than preset alarm value or default linkage value, export corresponding alerting signal or interlock protection signal to control system.
Before described effective value processing unit 2, be provided with pre-process unit 5, the temperature signal that temperature sensor 1 is measured in described pre-process unit 5 carries out filtering and/or analog to digital conversion, and then temperature signal after processing is exported to effective value processing unit 2.
the utility model principle of work and the course of work:
As shown in Figure 1, the utility model is in based on thermometric control system interlock protection device, by the default temperature effective value of measuring, filtering time and early warning temperature, chain temperature, within the filtering time of regulation, the data of temperature sensor collection are carried out to effective value calculating, again effective value and default effective value comparison, thereby tell the true and false of measuring temperature data, judgement is regarded as because of sensor broken string, short circuit, loose contact or signal disturb the glitch data that cause to carry out very first time isolation warning, avoid in time causing interlock protection misoperation because of glitch input control system, and warning reminding allows plant maintenance personnel get involved and to carry out fault handling in time before accident occurs, further judge to being judged to be the temperature measuring data of normal signal whether data exceed early warning temperature or chain temperature, and according to judging that the corresponding alerting signal of output or interlock protection signal are to control system, thereby the data that guarantee temperature point are served control system effectively reliably, the shutdown of avoiding mistake interlock protection to cause, reduce the shutdown loss causing thus, effectively improve the reliability of control system institute control device.
As illustrated in fig. 1 and 2, before interlock protection device operation, preset filtering times and 3 inputs of chain judging unit default effective value, preset alarm value and default linkage value by setting unit 4 to 2 inputs of effective value processing unit.When work, the measuring point that temperature sensor 1 is measured institute's control device as block bearing temperature after, measurement temperature is exported to pre-process unit 5 carries out after data pre-process, again the temperature data after pre-process is exported to effective value processing unit 2, measure the effective value of temperature according to default filtering Time Calculation, and the temperature effective value after calculating is exported to chain judging unit 3, chain judging unit 3 is by temperature effective value and default effective value comparison, in the time that temperature effective value is not less than default effective value, output abnormality alerting signal is locked guard signal to control system 7 to warning device and/or outputting cutting disconnection, by anomaly alarming device 6 report to the police and/or control system 7 not to interlock protection device output signal.Chain judging unit 3 is in the time that temperature effective value is less than default effective value; the unprocessed measurement temperature value that effective value processing unit 2 is inputted and preset alarm value and linkage value comparison; in the time that measurement temperature is greater than preset alarm value or linkage value; export corresponding alerting signal or interlock protection signal to control system 7; control system 7 is according to the signal output overtemperature alarm of input or export interlock protection signal to interlock protection device, to the interlock protections such as control device shutdown warning.
Claims (7)
1. based on a thermometric control system interlock protection device, it is characterized in that comprising temperature sensor (1), effective value processing unit (2), chain judging unit (3), wherein:
Temperature sensor (1) is for measuring the temperature of described control system institute control device, and the temperature of measurement is exported to effective value processing unit (2);
Effective value processing unit (2) is for calculating the effective value of the measured temperature of described temperature sensor (1), and described temperature effective value is exported to chain judging unit (3);
Chain judging unit (3) is for by described temperature effective value and default effective value comparison, and in the time that temperature effective value is not less than default effective value, output abnormality alerting signal is locked guard signal to control system to warning device and/or outputting cutting disconnection.
2. interlock protection device according to claim 1, is characterized in that described effective value processing unit (2) is that the maximum measured temperature of inputting within the default filtering time is measured the difference of temperature as the effective value of measurement temperature with minimum.
3. interlock protection device according to claim 1 and 2; characterized by further comprising setting unit (4); described setting unit (4) is connected with effective value processing unit (2) and/or chain judging unit (3) signal, for the default filtering time of described effective value processing unit (2) and/or default effective value, preset alarm value and the default linkage value of chain judging unit (3) are set.
4. interlock protection device according to claim 1 and 2; it is characterized in that described chain judging unit (3) is in the time that temperature effective value is less than default effective value; output signal to effective value processing unit (2); undressed measurement temperature is directly exported to chain judging unit (3) by effective value processing unit (2); described chain judging unit (3) is by measurement temperature and preset alarm value and the default linkage value comparison of input; in the time that measurement temperature is greater than preset alarm value or default linkage value, export corresponding alerting signal or interlock protection signal to control system.
5. according to the interlock protection device described in claim 1 or 2, it is characterized in that temperature effective value and undressed measurement temperature value after calculating together exported to chain judging unit (3) by described effective value processing unit (2).
6. interlock protection device according to claim 5; it is characterized in that described chain judging unit (3) is in the time that temperature effective value is less than default effective value; directly by undressed measurement temperature value and preset alarm value and default linkage value comparison; in the time that measurement temperature value is greater than preset alarm value or default linkage value, export corresponding alerting signal or interlock protection signal to control system.
7. interlock protection device according to claim 1 and 2; it is characterized in that the front pre-process unit (5) that is provided with of described effective value processing unit (2); the temperature signal that temperature sensor (1) is measured in described pre-process unit (5) carries out filtering and/or analog to digital conversion, and then temperature signal after processing is exported to effective value processing unit (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420029626.0U CN203658765U (en) | 2014-01-17 | 2014-01-17 | Control system interlocking protection device based on temperature measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420029626.0U CN203658765U (en) | 2014-01-17 | 2014-01-17 | Control system interlocking protection device based on temperature measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203658765U true CN203658765U (en) | 2014-06-18 |
Family
ID=50925138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420029626.0U Expired - Fee Related CN203658765U (en) | 2014-01-17 | 2014-01-17 | Control system interlocking protection device based on temperature measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203658765U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744316A (en) * | 2014-01-17 | 2014-04-23 | 武钢集团昆明钢铁股份有限公司 | Control system protecting device and protecting method based on temperature measurement |
| CN106167251A (en) * | 2016-07-12 | 2016-11-30 | 中国石油化工股份有限公司 | Warning interlock system and warning interlocking method for resin bed monitoring temperature |
| CN106351825A (en) * | 2016-08-30 | 2017-01-25 | 安徽三星化工有限责任公司 | Method for achieving judgment on machine pump running state and interlocking through relevant parameters |
| CN108958218A (en) * | 2018-06-27 | 2018-12-07 | 浙江智海化工设备工程有限公司 | A kind of functional module preventing Temperature jump for control system |
| CN111608744A (en) * | 2020-07-03 | 2020-09-01 | 神华神东电力有限责任公司 | Turbine bearing temperature protection method and device and electronic equipment |
-
2014
- 2014-01-17 CN CN201420029626.0U patent/CN203658765U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103744316A (en) * | 2014-01-17 | 2014-04-23 | 武钢集团昆明钢铁股份有限公司 | Control system protecting device and protecting method based on temperature measurement |
| CN103744316B (en) * | 2014-01-17 | 2016-06-22 | 武钢集团昆明钢铁股份有限公司 | A kind of based on thermometric control system protection device and guard method |
| CN106167251A (en) * | 2016-07-12 | 2016-11-30 | 中国石油化工股份有限公司 | Warning interlock system and warning interlocking method for resin bed monitoring temperature |
| CN106351825A (en) * | 2016-08-30 | 2017-01-25 | 安徽三星化工有限责任公司 | Method for achieving judgment on machine pump running state and interlocking through relevant parameters |
| CN108958218A (en) * | 2018-06-27 | 2018-12-07 | 浙江智海化工设备工程有限公司 | A kind of functional module preventing Temperature jump for control system |
| CN111608744A (en) * | 2020-07-03 | 2020-09-01 | 神华神东电力有限责任公司 | Turbine bearing temperature protection method and device and electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103744316B (en) | A kind of based on thermometric control system protection device and guard method | |
| CN203658765U (en) | Control system interlocking protection device based on temperature measurement | |
| CN106372735B (en) | Relay protection state evaluation method | |
| CN206863579U (en) | A kind of device of raising DCS control systems temperature protection input security | |
| CN103953399A (en) | Monitoring device and online monitoring method of quick closing process of steam turbine inlet valve | |
| CN102723776B (en) | A kind of transforming plant protecting measure and control device Virtual Debugging system | |
| CN206515682U (en) | The big motor temperature centralized management system of toilet paper machine based on PLC system | |
| CN103163402B (en) | Relay protection device state monitoring apparatus based on secondary circuit and monitoring method | |
| CN207964114U (en) | Triplex level redundancy type temperature sensor | |
| CN103901785A (en) | Temperature value processing method for improving protection action reliability | |
| CN104007758B (en) | Gateway communication abnormality self-diagnosing method and system in nuclear power station dcs | |
| CN102736598A (en) | Safety monitoring device for chemical production | |
| US20220206482A1 (en) | Substation equipment monitoring using a scada system | |
| CN205049937U (en) | Control system for DCS system | |
| CN210768951U (en) | Steam turbine main fuel tank oil level monitoring protection device | |
| CN104181420B (en) | The response time method of testing and system of nuclear power station ATWS systems | |
| CN204405222U (en) | A kind of series-parallel combined-type fiber grating sensing system | |
| CN109712729B (en) | Nuclear power station alarm method, and saturation margin calculation method and system | |
| CN204125042U (en) | A kind of hoisting crane Special polar low temperature checking system | |
| CN113628770A (en) | Real-time monitoring system for pressure and temperature limit of nuclear power plant | |
| CN202471253U (en) | Online fault detecting device of secondary equipment panel | |
| CN106774235A (en) | The abnormality diagnostic device and method of a kind of simulation input channel | |
| CN203310533U (en) | Drum water level indicator heating system | |
| CN204594613U (en) | For the online pressure monitoring device of transformer | |
| KR101569988B1 (en) | System and method for inspecting nuclear power plant monitoring system |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20180117 |