CN111271981B - Metallurgical furnace temperature monitoring method and monitoring system - Google Patents
Metallurgical furnace temperature monitoring method and monitoring system Download PDFInfo
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- CN111271981B CN111271981B CN202010062776.1A CN202010062776A CN111271981B CN 111271981 B CN111271981 B CN 111271981B CN 202010062776 A CN202010062776 A CN 202010062776A CN 111271981 B CN111271981 B CN 111271981B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
- F27D21/04—Arrangements of indicators or alarms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
Abstract
The invention provides a metallurgical furnace temperature monitoring method and a monitoring system, which comprises the following steps: s1, acquiring furnace top temperature at the top of the metallurgical furnace, furnace temperature at the middle part and furnace bottom temperature data at the bottom of the metallurgical furnace in a certain period, and respectively calculating a temperature average value and a temperature variance; s2, acquiring real-time temperatures of different parts of the metallurgical furnace; s3, if the real-time temperature of any part does not exceed the corresponding alarm threshold, calculating an early warning value Lv according to the real-time temperature, the corresponding temperature average value and the corresponding temperature variance; and S4, generating different early warning signals according to different early warning values. The invention establishes a grading early warning mechanism by acquiring the real-time temperature data of different parts of the metallurgical furnace and correlating the real-time temperature data with the average temperature value and the variance, thereby avoiding the situations of false alarm and missing report.
Description
Technical Field
The invention relates to the technical field of metal smelting, in particular to a method and a system for monitoring the temperature of a metallurgical furnace.
Background
In the metallurgical industry, the temperature of a high-temperature reaction furnace needs to be monitored, otherwise, the metal smelting effect is poor due to too low temperature, and raw material loss or unqualified metal finished products, even in-furnace adhesion, is caused due to too high temperature, so that great loss is caused.
For example, as disclosed in patent application No. 201520175006.2 ("a PLC-based real-time temperature detection system for a metallurgical heating furnace"), a plurality of temperature sensors are disposed at a plurality of positions in the metallurgical heating furnace, before use, an upper limit value of a deviation value between a theoretical heating temperature and an actual heating temperature in the furnace is set by a parameter setting unit, during use, the heating temperatures at the plurality of positions in the heating furnace are detected by the plurality of temperature sensors in real time, and the actual heating temperature in the heating furnace is solved, meanwhile, a theoretical temperature estimation unit calculates, contrasts and analyzes the theoretical heating temperature of the heating furnace according to the heating power of the heating furnace, and transmits the analyzed deviation value to a PLC controller, which determines that when the deviation value is greater than the upper limit value, the alarm unit gives an alarm prompt, otherwise, the alarm is not given.
However, in the above scheme, the actual heating temperature in 1 heating furnace is calculated by the temperature at different positions in the furnace, and then compared with the theoretical heating temperature, but because the requirements of different parts of the high-temperature reaction furnace on the temperature are different, such as the requirement of the furnace top temperature being in the range of 350-550 ℃, the furnace temperature being 2000-3000 ℃, the furnace bottom temperature being 1200-, therefore, the temperature monitoring result is inaccurate, for example, false alarm and missing report can be caused when a certain temperature sensor fails, so that the whole production is stopped, and the normal production rhythm is influenced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a metallurgical furnace temperature monitoring method and a monitoring system, which establish a grading early warning mechanism by acquiring real-time temperature data of different parts of a metallurgical furnace and correlating the real-time temperature data with a temperature average value and a temperature variance, thereby avoiding the occurrence of false alarm and false alarm.
In order to achieve the purpose, the invention provides the following technical scheme:
in one aspect, a method for monitoring the temperature of a metallurgical furnace is provided, which comprises the following steps:
s1, acquiring furnace top temperature, furnace temperature in the middle and furnace bottom temperature data of the top of the metallurgical furnace in a certain period, and respectively calculating the average temperature and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period under the assumption that the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period are in normal distribution; the temperature mean value and the temperature variance are furnace top temperature mean value tv, furnace top temperature variance dt, furnace temperature mean value mv, furnace temperature variance dm, furnace bottom temperature mean value rv and furnace bottom temperature variance dr;
s2, correspondingly arranging a top temperature sensor, a middle temperature sensor and a bottom temperature sensor at the top, the middle and the bottom of the metallurgical furnace to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time so as to correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
s3, if any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R does not exceed the corresponding alarm threshold, calculating an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance, wherein a calculation formula (1) of the early warning value Lv is as follows:
and S4, generating different early warning signals according to different early warning values.
Preferably, the alarm signal is directly generated if one or more of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R exceed the corresponding alarm threshold.
Preferably, the alarm signal is generated when the top real-time temperature T is greater than or equal to 550 ℃ and/or the middle real-time temperature M is greater than or equal to 3000 ℃ and/or the bottom real-time temperature R is greater than or equal to 1800 ℃.
Preferably, the step S4 includes: and if the first limit value is less than or equal to the second limit value and less than or equal to the Lv, generating and sending first early warning information to remind personnel to take first measures.
Preferably, the step S4 includes: if the second limit value is less than or equal to the third limit value, calculating the contribution degree of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to the formulas (2) to (4); when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is larger than or equal to a second limit value, second early warning information is generated and sent to remind personnel to take a second measure;
preferably, the step S4 includes: and if the Lv is larger than a third limit value, generating and sending third early warning information to remind personnel to take third measures.
Also provided is a metallurgical furnace temperature monitoring system for implementing the monitoring method, which comprises:
the historical data statistical unit is used for acquiring furnace top temperature at the top of the metallurgical furnace, furnace temperature in the middle of the metallurgical furnace and furnace bottom temperature data at the bottom of the metallurgical furnace in a certain period; respectively calculating the average temperature and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period of time; the temperature mean value and the temperature variance are furnace top temperature mean value tv, furnace top temperature variance dt, furnace temperature mean value mv, furnace temperature variance dm, furnace bottom temperature mean value rv and furnace bottom temperature variance dr;
the temperature sensors are correspondingly arranged at the top, the middle and the bottom of the metallurgical furnace so as to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time, and correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
the alarm unit is connected with each temperature sensor and is used for directly generating an alarm signal when one or more of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R exceeds a corresponding alarm threshold value;
the early warning value calculation unit is connected with each temperature sensor and the historical data statistical unit and used for calculating an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M, the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance, and a calculation formula (1) of the early warning value Lv is as follows:
and the early warning unit is connected with the early warning value calculation unit and used for generating different early warning signals according to different early warning values so as to remind personnel to take corresponding measures.
Preferably, the early warning unit includes:
the primary early warning unit is used for generating and sending first early warning information when the first limit value is less than or equal to the second limit value and reminding personnel to take first measures;
the contribution degree calculating unit is used for calculating the contribution degrees of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to the formulas (2) to (4) when the second limit value is less than or equal to the Lv and less than or equal to the third limit value;
the secondary early warning unit is connected with the contribution degree calculation unit and used for generating and sending second early warning information when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is larger than or equal to a second limit value so as to remind personnel to take a second measure;
and the third-level early warning unit is used for generating and sending third early warning information when the Lv is larger than a third limit value so as to remind personnel to take a third measure.
The invention adopts the alarm and early warning modes to effectively monitor the temperatures of different parts and the whole metallurgical furnace, fully considers the contribution degree of the real-time temperatures of the different parts to the early warning value in the process of acquiring the early warning value to generate different early warning signals and realize graded early warning, thereby avoiding the occurrence of false report and missed report generated in the process of alarming and early warning by adopting the temperature of a single part and improving the accuracy of the early warning.
Drawings
FIG. 1 is a flow chart of a metallurgical furnace temperature monitoring method according to the present invention;
FIG. 2 is a block diagram of a metallurgical furnace temperature monitoring system according to the present invention;
fig. 3 is a structural diagram of the early warning unit of the present invention.
Detailed Description
For the convenience of understanding, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the embodiment provides a method for monitoring the temperature of a metallurgical furnace, which comprises the following steps as shown in fig. 1:
s1, acquiring furnace top temperature at the top of the metallurgical furnace, furnace temperature at the middle part and furnace bottom temperature data at the bottom of the metallurgical furnace within a certain period (such as at least one month);
respectively calculating the average temperature value and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period of time, wherein the average temperature value and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period of time are assumed to belong to normal distribution, and the average temperature value and the variance of the furnace bottom temperature are the average furnace top temperature value tv, the variance of the furnace top temperature dt, the average furnace temperature value mv, the variance of the furnace temperature dm, the average furnace bottom temperature value rv and the variance of the furnace bottom temperature dr;
s2, correspondingly arranging a top temperature sensor, a middle temperature sensor and a bottom temperature sensor at the top, the middle and the bottom of the metallurgical furnace to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time so as to correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
in the real-time monitoring process, if one or more of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R exceeds a corresponding alarm threshold, an alarm signal (such as various sound and light alarm signals) is directly generated; in the embodiment, the alarm signal is generated when the top real-time temperature T is more than or equal to 550 ℃, the middle real-time temperature M is more than or equal to 3000 ℃ and/or the bottom real-time temperature R is more than or equal to 1800 ℃;
s3, if any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R does not exceed the corresponding alarm threshold, calculating an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance, wherein a calculation formula (1) of the early warning value Lv is as follows:
and S4, generating different early warning signals according to different early warning values to remind personnel to take corresponding measures.
Specifically, the step S4 includes:
if the Lv is less than or equal to the first limit value, the data is normal, safe production can be realized, and early warning is not needed;
if the first limit value is less than or equal to the second limit value and less than or equal to the Lv, the whole situation of the production site is in a controllable range, but the whole situation needs to be paid attention to, and first early warning information is generated and sent to remind personnel to take first measures; the first warning information includes a warning value Lv at this time, and the first measure includes: personnel can remotely monitor the site by calling site videos and the like, but do not need to perform site processing;
if the second limit value is less than or equal to the third limit value, calculating the contribution degree of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to the formulas (2) to (4); and when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is larger than or equal to a second limit value, the real-time temperature is possibly over a dangerous level at the moment, second early warning information is generated and sent to remind personnel to take a second measure, the second early warning information comprises the real-time temperature of which the contribution degree is larger than or equal to the second limit value and/or the contribution degree of the real-time temperature and/or an early warning value Lv at the moment, and the second measure comprises the following steps: the field workers are informed not to evacuate, and meanwhile, the workers and/or equipment are dispatched to carry out field observation and processing;
if Lv is larger than a third limit value, the comprehensive influence of the temperature of each part indicates that the overall temperature of the metallurgical furnace is easy to cause accidents, and third early warning information is generated and sent to remind personnel to take third measures; the third warning information includes a warning value Lv at this time, and the third measure includes: and reporting the condition, stopping production, informing field workers to evacuate, and dispatching professional personnel and/or equipment to carry out field processing.
In the above steps, the determination of the first limit value to the third limit value may be determined according to actual monitoring requirements, and the severity of the early warning information is that the first early warning information is less than the second early warning information and less than the third early warning information in sequence.
Therefore, the quantitative change characteristics of the temperatures of different parts of the metallurgical furnace can be acquired in real time in the quantitative change process through the formulas (1) to (4), the digitization of the early warning process and the real-time data monitoring of the production process are realized, the hidden danger is solved at the minimum cost in advance, the accident is eliminated in the bud state, and the production is not influenced; furthermore, absolute values are adopted in the formulas (1) to (4), so that the degree of the relevant temperature change is ensured to be matched with Lv, and the accuracy of early warning is further improved.
Example 2:
the embodiment provides a metallurgical furnace temperature monitoring system for implementing the monitoring method in embodiment 1, as shown in fig. 2, including:
a historical data statistical unit 1 for acquiring data of a furnace top temperature at the top of the metallurgical furnace, a furnace temperature at the middle of the metallurgical furnace, and a furnace bottom temperature at the bottom of the metallurgical furnace for a certain period (e.g., at least one month); respectively calculating the average temperature and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period of time; the temperature mean value and the temperature variance are furnace top temperature mean value tv, furnace top temperature variance dt, furnace temperature mean value mv, furnace temperature variance dm, furnace bottom temperature mean value rv and furnace bottom temperature variance dr;
the temperature sensors 2 are correspondingly arranged at the top, the middle and the bottom of the metallurgical furnace so as to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time, and correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
the alarm unit 3 is connected with each temperature sensor 2 and is used for directly generating an alarm signal when one or more of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R exceeds a corresponding alarm threshold value;
the early warning value calculation unit 4 is connected with each temperature sensor 2 and the historical data statistics unit 1, and is configured to calculate an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M, the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance when any one of the top real-time temperature T, the middle real-time temperature M, and the bottom real-time temperature R does not exceed the corresponding alarm threshold, where a calculation formula (1) of the early warning value Lv is as follows:
and the early warning unit 5 is connected with the early warning value calculation unit 4 and is used for generating different early warning signals according to different early warning values so as to remind personnel to take corresponding measures.
Specifically, as shown in fig. 3, the early warning unit 5 includes:
the primary early warning unit 51 is used for generating and sending first early warning information when the first limit value is less than or equal to the second limit value and reminding personnel to take a first measure;
a contribution calculating unit 52 for calculating the contribution degree of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to equations (2) - (4) when the second limit value < Lv < the third limit value;
the secondary early warning unit 53 is connected with the contribution degree calculation unit 52, and is used for generating and sending second early warning information when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is greater than or equal to a second limit value so as to remind personnel to take a second measure;
and the third-level early warning unit 54 is used for generating and sending third early warning information when the Lv is larger than a third limit value so as to remind personnel to take a third measure.
The first to third measures are the same as in embodiment 1, and are not described again here.
Therefore, the invention adopts the mode that the real-time temperature of a single metallurgical furnace exceeds the corresponding alarm threshold value, namely, the alarm and the graded early warning, to accurately and comprehensively monitor the different parts and the whole temperature of the metallurgical furnace, and acquire the quantitative change characteristic of the temperature in real time, thereby realizing the digitization of the early warning process and the real-time data monitoring of the production process, solving the hidden trouble at the minimum cost in advance, eliminating the accident in the bud state and not influencing the production; particularly, in a grading early warning mechanism, real-time temperatures of different parts are taken into consideration by a formula (1), so that the situations of false reporting and false reporting generated when a single part temperature is adopted for warning and early warning are fully avoided, the accuracy of early warning is improved, and meanwhile, early warning information of different levels is generated by combining the contribution degrees of the real-time temperatures of the different parts to early warning values, so that sufficient processing time is reserved for personnel, meanwhile, the real-time temperature of the specific metallurgical furnace of the personnel is reminded to be close to the dangerous level, the valuable parts are convenient to take targeted measures, and the waste of time caused by one-by-one investigation is avoided.
The technical features of the above embodiments 1-2 can be combined arbitrarily, and the combined technical solutions all belong to the protection scope of the present invention. And it will be evident to those skilled in the art that the embodiments of the present invention are not limited to the details of the foregoing illustrative embodiments, and that the embodiments of the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the embodiments being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is obvious that the word "comprising" does not exclude other elements or steps, and the singular does not exclude the plural. Several units, modules or means recited in the system, apparatus or terminal claims may also be implemented by one and the same unit, module or means in software or hardware. The terms first, second, etc. are used to denote names, but not any particular order.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention and not for limiting, and although the embodiments of the present invention are described in detail with reference to the above preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the embodiments of the present invention without departing from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A method for monitoring the temperature of a metallurgical furnace is characterized by comprising the following steps:
s1, acquiring furnace top temperature, furnace temperature in the middle and furnace bottom temperature data of the top of the metallurgical furnace in a certain period, and respectively calculating the average temperature and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period under the assumption that the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period are in normal distribution; the temperature mean value and the temperature variance are furnace top temperature mean value tv, furnace top temperature variance dt, furnace temperature mean value mv, furnace temperature variance dm, furnace bottom temperature mean value rv and furnace bottom temperature variance dr;
s2, correspondingly arranging a top temperature sensor, a middle temperature sensor and a bottom temperature sensor at the top, the middle and the bottom of the metallurgical furnace to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time so as to correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
s3, if any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R does not exceed the corresponding alarm threshold, calculating an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance, wherein a calculation formula (1) of the early warning value Lv is as follows:
and S4, generating different early warning signals according to different early warning values.
2. The metallurgical furnace temperature monitoring method of claim 1, wherein an alarm signal is generated directly if one or more of the top real-time temperature T, the middle real-time temperature M, and the bottom real-time temperature R exceeds a corresponding alarm threshold.
3. The metallurgical furnace temperature monitoring method of claim 1, wherein the warning signal is generated directly when the top real-time temperature T is greater than or equal to 550 ℃ and/or the middle real-time temperature M is greater than or equal to 3000 ℃ and/or the bottom real-time temperature R is greater than or equal to 1800 ℃.
4. The metallurgical furnace temperature monitoring method according to claim 1, wherein the step S4 comprises: and if the first limit value is less than or equal to the second limit value and less than or equal to the Lv, generating and sending first early warning information to remind personnel to take first measures.
5. The metallurgical furnace temperature monitoring method according to claim 1, wherein the step S4 comprises: if the second limit value is less than or equal to the third limit value, calculating the contribution degree of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to the formulas (2) to (4); when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is larger than or equal to a second limit value, second early warning information is generated and sent to remind personnel to take a second measure;
6. the metallurgical furnace temperature monitoring method according to claim 1, wherein the step S4 comprises: and if the Lv is larger than a third limit value, generating and sending third early warning information to remind personnel to take third measures.
7. A metallurgical furnace temperature monitoring system for implementing the monitoring method of any one of claims 1-6, comprising:
the historical data statistical unit is used for acquiring furnace top temperature at the top of the metallurgical furnace, furnace temperature in the middle of the metallurgical furnace and furnace bottom temperature data at the bottom of the metallurgical furnace in a certain period; respectively calculating the average temperature and the variance of the furnace top temperature, the furnace temperature and the furnace bottom temperature in the period of time; the temperature mean value and the temperature variance are furnace top temperature mean value tv, furnace top temperature variance dt, furnace temperature mean value mv, furnace temperature variance dm, furnace bottom temperature mean value rv and furnace bottom temperature variance dr;
the temperature sensors are correspondingly arranged at the top, the middle and the bottom of the metallurgical furnace so as to correspondingly monitor the top, the middle and the bottom of the metallurgical furnace in real time, and correspondingly obtain the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R of the metallurgical furnace;
the alarm unit is connected with each temperature sensor and is used for directly generating an alarm signal when one or more of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R exceeds a corresponding alarm threshold value;
the early warning value calculation unit is connected with each temperature sensor and the historical data statistical unit and used for calculating an early warning value Lv according to the top real-time temperature T, the middle real-time temperature M, the bottom real-time temperature R, the corresponding temperature average value and the corresponding temperature variance, and a calculation formula (1) of the early warning value Lv is as follows:
and the early warning unit is connected with the early warning value calculation unit and used for generating different early warning signals according to different early warning values so as to remind personnel to take corresponding measures.
8. The metallurgical furnace temperature monitoring system of claim 7, wherein the early warning unit comprises:
the primary early warning unit is used for generating and sending first early warning information when the first limit value is less than or equal to the second limit value and reminding personnel to take first measures;
the contribution degree calculating unit is used for calculating the contribution degrees of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R to the early warning value Lv according to the formulas (2) to (4) when the second limit value is less than or equal to the Lv and less than or equal to the third limit value;
the secondary early warning unit is connected with the contribution degree calculation unit and used for generating and sending second early warning information when the contribution degree of any one of the top real-time temperature T, the middle real-time temperature M and the bottom real-time temperature R is larger than or equal to a second limit value so as to remind personnel to take a second measure;
and the third-level early warning unit is used for generating and sending third early warning information when the Lv is larger than a third limit value so as to remind personnel to take a third measure.
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| CN110415494A (en) * | 2019-07-25 | 2019-11-05 | 西安因联信息科技有限公司 | A kind of equipment alarm threshold value calculation method based on history data |
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