CN114959144B - Weighing compensation method and system - Google Patents
Weighing compensation method and system Download PDFInfo
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- CN114959144B CN114959144B CN202210687315.2A CN202210687315A CN114959144B CN 114959144 B CN114959144 B CN 114959144B CN 202210687315 A CN202210687315 A CN 202210687315A CN 114959144 B CN114959144 B CN 114959144B
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- 238000005303 weighing Methods 0.000 title claims abstract description 115
- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000007599 discharging Methods 0.000 claims abstract description 27
- 239000000463 material Substances 0.000 claims description 41
- 230000005540 biological transmission Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 14
- 230000003111 delayed effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 20
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000002801 charged material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/18—Bell-and-hopper arrangements
- C21B7/20—Bell-and-hopper arrangements with appliances for distributing the burden
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
The application provides a weighing compensation method and a system, comprising the following steps: initializing; starting a feeding process to obtain a fill value; starting a discharging process to obtain a bucket blank value; calculating residual vibration quantity, furnace charging quantity, current error and total error; judging whether the total error exceeds the upper and lower error limits; and recalculating the control value, and repeating the steps. The weighing compensation method simplifies the weighing compensation program, has good compensation effect, and performs modularized processing on the program, and when the weighing compensation method is used, the program block is only required to be called, and variables such as each set value, the first coefficient, the second coefficient, the third coefficient, the upper error limit, the lower error limit and the like corresponding to the weighing hopper are set. The modularized processing only needs to master the functions of the module, thereby facilitating programming and debugging and reducing error rate.
Description
Technical Field
The application relates to the technical field of metallurgical feeding weighing compensation, in particular to a weighing compensation method and a system.
Background
Weighing hoppers are widely used in the metallurgical industry and other industrial fields, and play an important role as metering equipment in the ironmaking field. The method of adopting the weighing hopper for blast furnace ore feeding, simultaneously, along with the progress of computer technology, the application of the secondary machine in a blast furnace system is more and more common, and the control method of ore feeding is comprehensively and deeply influenced.
When the blast furnace is charged, each weighing hopper can generate errors in the discharging process, and compensation values of the weighing hoppers need to be calculated through complicated procedures, so that various charged materials are kept in a certain proportion, and the maximum iron-making benefit is achieved. However, each weighing hopper is independently calculated in the program, so that the program becomes more complicated, the program is more difficult to read, and the possibility of program errors is increased.
Disclosure of Invention
The application provides a weighing compensation method and a weighing compensation system, which are used for solving the problems that a compensation program is complex, the reading of the compensation program is difficult, and the possibility of error of the compensation program is high.
In a first aspect, the present application provides a weighing compensation method comprising: when an initialization signal is received, a set value and a control value are obtained; when receiving a material transmission starting signal, sending a feeding electromagnetic valve opening signal to a feeding electromagnetic valve to obtain a bucket filling value; when receiving a discharge start signal, sending a discharge solenoid valve opening signal to a discharge solenoid valve to obtain a bucket blank value; calculating residual vibration quantity, wherein the residual vibration quantity is equal to the fill value minus the control value; calculating the furnace charge, wherein the furnace charge is equal to the fill full value minus the fill empty value; calculating the current error, wherein the current error is equal to a set value minus the furnace charging quantity; calculating a total error, wherein the total error is the sum of the last total error and the current error; when the total error is smaller than the upper error limit or larger than the lower error limit, giving the total error to the real-time error; when the total error is greater than or equal to the upper error limit or the total error is less than or equal to the lower error limit, the upper error limit or the lower error limit is assigned to the real-time error; and recalculating a control value, wherein the control value is equal to the set value plus the real-time error and minus the residual vibration.
Optionally, the step of acquiring the set value and the control value when receiving the initialization signal includes: when an initialization signal is received, an input set value is obtained; setting the control value as the product of a first coefficient and a set value, wherein the first coefficient is between 0.9 and 1; setting the result of subtracting the control value from the set value as the residual vibration quantity; initializing a weighing value to zero; setting the furnace charge quantity, the current error, the total error and the real-time error to be zero.
Optionally, when receiving the material transmission start signal, sending a feeding electromagnetic valve opening signal to the feeding electromagnetic valve, and obtaining the fill value includes: when receiving a material transmission starting signal, sending a feeding electromagnetic valve opening signal to a feeding electromagnetic valve; when the weighing value is larger than the product of the second coefficient and the control value, generating a bucket non-empty signal, wherein the second coefficient is between 0 and 0.5; when the weighing value is greater than or equal to the control value, sending a closing signal of the feeding electromagnetic valve to the feeding electromagnetic valve; when the bucket non-empty signal is detected and the weighing value is stable for a preset time and does not change, a feeding completion signal is generated; when the feeding completion signal is detected, the weighing value is assigned to the fill full value, the fill full value is obtained, and the discharging start signal is generated.
Optionally, when receiving the unloading start signal, sending an unloading solenoid valve opening signal to the unloading solenoid valve, and the step of obtaining the bucket blank value includes: when a discharge start signal is detected, a discharge solenoid valve opening signal is sent to the discharge solenoid valve; generating a bucket non-full signal when the weighing value is less than the product of a third coefficient and the control value, wherein the third coefficient is between 0.5 and 1; when the weighing value is zero or the preset time is delayed, a closing signal of the discharging electromagnetic valve is sent to the discharging electromagnetic valve; when the bucket non-full signal is detected and the weighing value is stable for a preset time and does not change, a discharging completion signal is generated; when the unloading completion signal is detected, the weighing value is assigned to the bucket empty value, and the bucket empty value is obtained.
Optionally, the weighing compensation method further includes: when a manual adjustment setting value signal is received, the received input value is assigned to the setting value.
Optionally, the weighing compensation method further includes: when the weighing value compensation signal is received, zeroing is performed using the received input value symmetry value.
Optionally, the weighing compensation method further includes: and transmitting the feeding amount to the secondary machine, and transmitting a material transmission completion signal to the secondary machine.
In a second aspect, the present application provides a weighing compensation system comprising: a weighing hopper configured to weigh a weight of a material; a feed solenoid configured to control material into the weigh hopper; a discharge solenoid configured to control discharge of material to the conveyor belt; a conveyor belt configured to transport material into the blast furnace; a controller configured to perform the method of the first aspect of the application.
The application provides a weighing compensation method and a system, comprising the following steps: initializing; starting a feeding process to obtain a fill value; starting a discharging process to obtain a bucket blank value; calculating residual vibration quantity, furnace charging quantity, current error and total error; judging whether the total error exceeds the upper and lower error limits; and recalculating the control value, and repeating the steps. The weighing compensation method simplifies the weighing compensation program, has good compensation effect, and performs modularized processing on the program, and when the weighing compensation method is used, the program block is only required to be called, and variables such as each set value, the first coefficient, the second coefficient, the third coefficient, the upper error limit, the lower error limit and the like corresponding to the weighing hopper are set. The modularized processing only needs to master the functions of the module, thereby facilitating programming and debugging and reducing error rate.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic flow chart of a weighing compensation method according to the present application;
FIG. 2 is a schematic diagram of a weighing compensation system according to the present application;
FIG. 3 is a flow chart of the method for obtaining the fill value according to the present application;
fig. 4 is a schematic flow chart of obtaining a bucket blank value according to the present application.
Illustration of:
wherein, 1-weighing hopper, 2-feeding solenoid valve, 3-discharging solenoid valve, 4-blast furnace, 5-conveyer belt.
Detailed Description
Reference will now be made in detail to the embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the examples below do not represent all embodiments consistent with the application. Merely exemplary of systems and methods consistent with aspects of the application as set forth in the claims.
A scale bucket is one type of under-tank weighing apparatus and generally comprises: the device comprises a bucket body, sensors and an instrument, wherein three sensors which form an angle of 120 degrees with each other are arranged outside the bucket body, so that a stable stress plane is formed. The sensor is attached with a resistance wire strain gauge, and when the sensor is deformed under the stress (tensile force or pressure), the strain gauge attached to the sensor also generates the same deformation, namely, elongation or shortening. The strain gauge attached to the sensor can form an electric bridge, then the electric bridge is connected with an amplifier and an indicator, when the strain gauge is deformed, the resistance value of the strain gauge is changed, the electric bridge is out of balance, a tiny voltage signal is output, and the electric bridge enters an amplifying instrument, so that the mechanical change is converted into the electric parameter change, and the measured value is reflected by the instrument, namely the measured value.
The blast furnace ore feeding adopts a weighing hopper mode, the feeding of the weighing hopper is controlled by a feeding electromagnetic valve, and the discharging of the weighing hopper is controlled by a discharging electromagnetic valve. Because the feeding solenoid valve and the discharging solenoid valve have certain delay in switching on and off, namely the valve is not completed immediately when being opened or closed. Therefore, the unavoidable surplus materials are produced, so that when the blast furnace is charged, each weighing hopper can generate errors in the discharging process, and compensation values of the weighing hoppers need to be calculated through complicated procedures, so that various charged materials are kept in a certain proportion, and the maximum iron-making benefit is achieved. However, each weighing hopper is independently calculated in the program, so that the program becomes more complicated, the program is more difficult to read, and the possibility of program errors is increased.
In order to solve the above problems, the present application provides a weighing compensation method and system.
As shown in fig. 1, the present application provides a weighing compensation method, comprising the steps of:
S100: when an initialization signal is received, initializing a system, and acquiring a set value and a control value.
An initialization signal is sent when the system is just powered up or the initialization button is manually pressed. The system is initialized to reset each mechanism of the system and to assign an initial value to each value in the system. The set value is a weight value to be fed to the blast furnace 4, and is manually inputted. The control value is a threshold value at which the system controls the closing of the feed solenoid valve 2.
In an exemplary embodiment, initializing the system, the step of obtaining the set point and the control value comprises: when an initialization signal is received, an input set value is obtained; setting the control value as the product of a first coefficient and a set value, wherein the first coefficient is between 0.9 and 1; setting the result of subtracting the control value from the set value as the residual vibration quantity; initializing a weighing value to zero; setting the furnace charge quantity, the current error, the total error and the real-time error to be zero.
By way of example, the initial control value is set to a set value of 0.96 times; the result of subtracting the control value from the set value is set as the initial residual vibration, which is an optimization scheme obtained through a plurality of experimental summaries, and the first coefficient is set to be 0.96, so that the setting is favorable for avoiding too large deviation when compensation is performed later.
S200: when receiving the material transmission start signal, sending a feeding electromagnetic valve opening signal to the feeding electromagnetic valve 2, starting a feeding process and obtaining a fill value.
When the blast furnace 4 needs to be charged, a charging start signal is sent. And after receiving the material transmission start signal, starting a feeding process, wherein the feeding process is to load materials into the weighing hopper 1.
In an exemplary embodiment, as shown in fig. 3, the step of sending a feeding solenoid valve opening signal to the feeding solenoid valve when receiving the material transfer start signal, and obtaining the fill value includes:
s201: when receiving the material transfer start signal, a feeding solenoid valve opening signal is sent to the feeding solenoid valve 2.
A feed solenoid valve opening signal is used for controlling the feed solenoid valve 2 to be opened, materials enter the weighing hopper 1, and the weighing value starts to increase.
S202: and when the weighing value is larger than the product of the second coefficient and the control value, generating a bucket non-empty signal, wherein the second coefficient is between 0 and 0.5.
For example, the second coefficient is set to 0.4, i.e. when the weighing value >0.4 x the control value, a bucket non-empty signal is generated. The bucket non-empty signal indicates that it is currently in the feed flow path for preventing errors in the process due to other unexpected reasons.
S203: and when the weighing value is greater than or equal to the control value, sending a closing signal of the feeding electromagnetic valve to the feeding electromagnetic valve 2.
When the weighing value is larger than or equal to the control value, indicating that the material in the weighing hopper 1 reaches the required amount, sending a closing signal of the feeding electromagnetic valve for controlling to close the feeding electromagnetic valve 2, and stopping feeding the material into the weighing hopper 1 continuously.
S204: when the bucket non-empty signal is detected and the weighing value is stable for a predetermined time without change, a feeding completion signal is generated.
For example, when a bucket non-empty signal is detected and the weighing value is stable for 10s without change, indicating that the feeding solenoid valve 2 has been fully closed and the remainder has been completely discharged, a feeding completion signal is generated to determine that the current weighing value is a bucket full value.
S205: when a feeding completion signal is detected, a weighing value is assigned to the bucket full value, and the bucket full value is obtained.
S206: a discharge start signal is generated.
And the unloading start signal is used for starting an unloading process.
S300: when receiving the unloading starting signal, sending an unloading solenoid valve opening signal to the unloading solenoid valve 3, starting an unloading process, and obtaining a bucket blank value.
The discharge process is that the weighing hopper 1 discharges the material onto the conveyor belt 5, and the material is transported into the blast furnace through the conveyor belt 5.
In an exemplary embodiment, as shown in fig. 4, the step of sending a discharge solenoid valve opening signal to the discharge solenoid valve when receiving the discharge start signal, and obtaining the bucket empty value includes:
s301: when a discharge start signal is detected, a discharge solenoid valve opening signal is sent to the discharge solenoid valve 3.
The discharge solenoid valve opening signal is used for controlling the discharge solenoid valve 3 to be opened, the material starts to be discharged from the weighing hopper 1 onto the conveyor belt 5, and the weighing value starts to be reduced.
S302: when the weighing value is less than the product of a third coefficient and the control value, generating a bucket non-full signal, wherein the third coefficient is between 0.5 and 1.
For example, the third coefficient is set to 0.8, i.e. when the weighing value <0.8 x the control value, a bucket non-full signal is generated. The bucket not full signal indicates that a discharge flow is currently in progress for preventing errors in the process due to other unexpected reasons.
S303: when the measured value is zero or delayed for a predetermined time, a discharge solenoid closing signal is sent to the discharge solenoid 3.
For example, when the weighing value=0 or after a delay of 60s, it is indicated that the material in the weighing hopper 1 has been discharged or that the material has not been able to be discharged, a discharge solenoid valve closing signal is sent to control closing of the discharge solenoid valve 3, and the weighing hopper 1 is stopped to continue discharging.
S304: and generating a discharging completion signal when the bucket non-full signal is received and the weighing value is stable for a preset time and does not change.
For example, when the bucket non-full signal is received and the weighing value is stable for 10s and does not change, the unloading solenoid valve 3 is completely closed, and the remainder is completely discharged, and then a unloading completion signal is generated for determining that the current weighing value is the bucket empty value.
S305: when the unloading completion signal is detected, the weighing value is assigned to the bucket empty value, and the bucket empty value is obtained.
S400: and calculating residual vibration quantity, furnace charging quantity, current error and total error.
Calculating residual vibration quantity, wherein the calculation formula of the residual vibration quantity is as follows: y=m-c, where y is the residual vibration, m is the fill value, and c is the control value.
Calculating the furnace feeding amount, wherein the calculation formula of the furnace feeding amount is as follows: l=m-k, where l is the charge, m is the fill-up value, and k is the fill-down value.
Calculating the current error, wherein the calculation formula of the current error is as follows: bw=s-l, wherein bw is the current error, s is a set value, and l is the charging amount.
And calculating the total error, wherein the total error is the sum of the last total error and the current error.
S500: and judging whether the total error exceeds the upper and lower error limits.
When the total error is smaller than the upper error limit or larger than the lower error limit, giving the total error to the real-time error;
When the total error is greater than or equal to the upper error limit or the total error is less than or equal to the lower error limit, the upper error limit or the lower error limit is assigned to the real-time error; that is, when the total error is greater than or equal to the upper error limit, the upper error limit is assigned to the real-time error, and when the total error is less than or equal to the lower error limit, the lower error limit is assigned to the real-time error.
When the total error does not exceed the upper and lower error limits, the real-time error is set to zero.
S600: recalculating a control value, wherein the calculation formula of the control value is as follows: c=s+sw-y, where c is a control value, s is a set value, sw is a real-time error, and y is a residual vibration amount.
And when a material transmission starting signal is received, repeating the steps by using the recalculated control value.
In an exemplary embodiment, the weighing compensation method further comprises: when a manual adjustment setting value signal is received, the received input value is assigned to the setting value.
The manual adjustment button can be pressed when needed, and the set value is manually adjusted, so that the system is convenient to overhaul and debug.
In an exemplary embodiment, the weighing compensation method further comprises: when the weighing value compensation signal is received, zeroing is performed using the received input value symmetry value.
The manual adjustment button can be pressed when needed, and the manual symmetry value is zeroed, so that the system is convenient to overhaul and debug.
In an exemplary embodiment, the weighing compensation method further comprises: and transmitting the feeding amount to a secondary machine, and sending a material transmission completion signal.
And transmitting the furnace charge to a secondary machine for monitoring the furnace charge by other systems. And sending a material conveying completion signal for indicating that the material conveying process is finished.
Specifically, taking a set value of 100, a first coefficient of 0.96, a second coefficient of 0.4, a third coefficient of 0.8, an upper error limit of 5, and a lower error limit of-5 as an example, the process of the weighing compensation method is described as shown in table 1:
TABLE 1
Initially:
when the initialization signal is received, the set value is 100, the control value is 96, the residual vibration quantity is 4, and the bucket empty value, the bucket full value, the furnace feeding quantity, the current error, the total error and the real-time error are all 0.
Primary:
and when receiving the material transmission starting signal, sending a feeding electromagnetic valve opening signal.
When the weighing value is >38.4, a bucket non-empty signal is generated.
And when the weighing value is more than or equal to 96, sending a closing signal of the feeding electromagnetic valve.
When the bucket non-empty signal is detected and the weighing value is stable for 10s without change, a feeding completion signal is generated. When the feed completion signal is detected, the bucket fill value is 105.
And generating a discharge start signal, and sending a discharge solenoid valve opening signal when the discharge start signal is detected.
When the weighing value is <76.8, a bucket non-full signal is generated.
When the measured value is 0 or after a delay of 60s, a closing signal of the discharging electromagnetic valve is sent.
And when the bucket non-full signal is detected and the weighing value is stable for 10s and does not change, generating a discharging completion signal.
When the discharge completion signal is detected, the bucket empty value is 4.
And calculating the residual vibration quantity, wherein the residual vibration quantity is 9.
And calculating the furnace charge, wherein the furnace charge is 101.
And calculating the current error, wherein the current error is-1.
And calculating the total error, wherein the total error is-1.
And when the total error is smaller than the upper error limit or larger than the lower error limit, the real-time error is-1. The control value is recalculated, the control value being 90.
And transmitting the feeding amount to a secondary machine, and sending a material transmission completion signal.
And (3) secondary:
and when receiving the material transmission starting signal, sending a feeding electromagnetic valve opening signal.
When the scale value >36, a bucket non-empty signal is generated.
And when the weighing value is more than or equal to 90, sending a closing signal of the feeding electromagnetic valve.
When the bucket non-empty signal is detected and the weighing value is stable for 10s without change, a feeding completion signal is generated.
When the feed completion signal is detected, the bucket fill value is 101.
And generating a discharge start signal, and sending a discharge solenoid valve opening signal when the discharge start signal is detected.
When the weighing value is <72, a bucket non-full signal is generated.
When the measured value is 0 or after a delay of 60s, a closing signal of the discharging electromagnetic valve is sent.
And when the bucket non-full signal is detected and the weighing value is stable for 10s and does not change, generating a discharging completion signal.
When the discharge completion signal is detected, the bucket blank value is 7.
And calculating the residual vibration quantity, wherein the residual vibration quantity is 11.
The charge was calculated to be 94.
And calculating the current error, wherein the current error is 6.
The total error was calculated to be 5.
And when the total error is greater than or equal to the upper error limit or less than or equal to the lower error limit, the real-time error is 5.
Recalculate control value, control value = 94.
And transmitting the feeding amount to a secondary machine, and sending a material transmission completion signal.
The three to ten times are the same as the above steps. As can be seen from table 1, the weighing compensation method simplifies the weighing compensation process, has good compensation effect, and performs modularized processing on the process, and when the weighing compensation method is used, only a program block is required to be called, and variables such as set values, first coefficients, second coefficients, third coefficients, upper error limits, lower error limits and the like corresponding to the weighing hoppers are set. The modularized processing only needs to master the functions of the module, so that the programming and debugging of the program are facilitated, the possibility of errors is reduced, and the method has good popularization value.
The present application provides a weighing compensation system, as shown in FIG. 2, comprising: a weighing hopper 1 configured to weigh a material; a feed solenoid valve 2 configured to control the entry of material into the scale hopper 1; a discharge solenoid valve 3 configured to control discharge of the material to the conveyor belt 5; a conveyor belt 5 configured to transport the material into the blast furnace 4; and a controller configured to perform the method in the above embodiment.
The application provides a weighing compensation method and a system, comprising the following steps: initializing; starting a feeding process to obtain a fill value; starting a discharging process to obtain a bucket blank value; calculating residual vibration quantity, furnace charging quantity, current error and total error; judging whether the total error exceeds the upper and lower error limits; and recalculating the control value, and repeating the steps. The weighing compensation method simplifies the weighing compensation program, has good compensation effect, and performs modularized processing on the program, and when the weighing compensation method is used, the program block is only required to be called, and variables such as each set value, the first coefficient, the second coefficient, the third coefficient, the upper error limit, the lower error limit and the like corresponding to the weighing hopper are set. The modularized processing only needs to master the functions of the module, thereby facilitating programming and debugging and reducing error rate.
The above-provided detailed description is merely a few examples under the general inventive concept and does not limit the scope of the present application. Any other embodiments which are extended according to the solution of the application without inventive effort fall within the scope of protection of the application for a person skilled in the art.
Claims (8)
1. A method of weight compensation, comprising:
when an initialization signal is received, a set value and a control value are obtained;
when a material transmission starting signal is received, a feeding electromagnetic valve opening signal is sent to the feeding electromagnetic valve, and a fill-up value is obtained, wherein the fill-up value is a weighing value when feeding is completed;
When receiving a discharging start signal, sending a discharging electromagnetic valve opening signal to the discharging electromagnetic valve to obtain a bucket empty value, wherein the bucket empty value is a weighing value when discharging is completed;
calculating residual vibration quantity, wherein the residual vibration quantity is equal to the fill value minus the control value;
Calculating the furnace charge, wherein the furnace charge is equal to the fill full value minus the fill empty value;
Calculating the current error, wherein the current error is equal to a set value minus the furnace charging quantity;
calculating a total error, wherein the total error is the sum of the last total error and the current error;
when the total error is smaller than the upper error limit or larger than the lower error limit, giving the total error to the real-time error;
When the total error is greater than or equal to the upper error limit or the total error is less than or equal to the lower error limit, the upper error limit or the lower error limit is assigned to the real-time error;
And recalculating a control value, wherein the control value is equal to the set value plus the real-time error and minus the residual vibration.
2. A weighing compensation method according to claim 1 wherein said step of obtaining set points and control values when an initialization signal is received comprises:
when an initialization signal is received, an input set value is obtained;
setting the control value as the product of a first coefficient and a set value, wherein the first coefficient is between 0.9 and 1;
setting the result of subtracting the control value from the set value as an initial residual vibration amount;
Initializing a weighing value to zero;
Setting the furnace charge quantity, the current error, the total error and the real-time error to be zero.
3. The method of claim 1, wherein the step of sending a feed solenoid valve open signal to a feed solenoid valve when a feed start signal is received, the step of obtaining a fill value comprises:
when receiving a material transmission starting signal, sending a feeding electromagnetic valve opening signal to a feeding electromagnetic valve;
When the weighing value is larger than the product of the second coefficient and the control value, generating a bucket non-empty signal, wherein the second coefficient is between 0 and 0.5;
When the weighing value is greater than or equal to the control value, sending a closing signal of the feeding electromagnetic valve to the feeding electromagnetic valve;
when the bucket non-empty signal is detected and the weighing value is stable for a preset time and does not change, a feeding completion signal is generated;
When the feeding completion signal is detected, the weighing value is assigned to the fill full value, the fill full value is obtained, and the discharging start signal is generated.
4. The method of claim 1, wherein the step of sending a discharge solenoid valve open signal to the discharge solenoid valve when a discharge start signal is received, the step of obtaining a fill empty value comprises:
When a discharge start signal is detected, a discharge solenoid valve opening signal is sent to the discharge solenoid valve;
Generating a bucket non-full signal when the weighing value is less than the product of a third coefficient and the control value, wherein the third coefficient is between 0.5 and 1;
When the weighing value is zero or the preset time is delayed, a closing signal of the discharging electromagnetic valve is sent to the discharging electromagnetic valve;
When the bucket non-full signal is detected and the weighing value is stable for a preset time and does not change, a discharging completion signal is generated;
when the unloading completion signal is detected, the weighing value is assigned to the bucket empty value, and the bucket empty value is obtained.
5. A method of weight compensation as set forth in claim 1, further comprising:
when a manual adjustment setting value signal is received, the received input value is assigned to the setting value.
6. A method of weight compensation as set forth in claim 1, further comprising: when the weighing value compensation signal is received, zeroing is performed using the received input value symmetry value.
7. A method of weight compensation as set forth in claim 1, further comprising: and transmitting the feeding amount to the secondary machine, and transmitting a material transmission completion signal to the secondary machine.
8. A weighing compensation system comprising:
A weighing hopper configured to weigh a weight of a material;
A feed solenoid configured to control material into the weigh hopper;
A discharge solenoid configured to control discharge of material to the conveyor belt;
A conveyor belt configured to transport material into the blast furnace;
A controller configured to perform the method of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210687315.2A CN114959144B (en) | 2022-06-16 | 2022-06-16 | Weighing compensation method and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210687315.2A CN114959144B (en) | 2022-06-16 | 2022-06-16 | Weighing compensation method and system |
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| Publication Number | Publication Date |
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| CN114959144A CN114959144A (en) | 2022-08-30 |
| CN114959144B true CN114959144B (en) | 2024-05-14 |
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