CN110585984A - Batching control method and system - Google Patents
Batching control method and system Download PDFInfo
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- CN110585984A CN110585984A CN201910929899.8A CN201910929899A CN110585984A CN 110585984 A CN110585984 A CN 110585984A CN 201910929899 A CN201910929899 A CN 201910929899A CN 110585984 A CN110585984 A CN 110585984A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
- B01F35/2117—Weight
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/71—Feed mechanisms
- B01F35/714—Feed mechanisms for feeding predetermined amounts
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Weight Measurement For Supplying Or Discharging Of Specified Amounts Of Material (AREA)
Abstract
The invention discloses a batching control method, which comprises the steps of discharging and carrying out preliminary weighing, closing a discharging valve in a program when the batching quantity is close to a preset value, realizing accurate control on the discharging quantity, and controlling the closing speed of a switch valve in a sampling accurate weighing statistical analysis mode, thereby improving the weighing precision and reducing the proportion of the process of repeatedly closing the valve and then carrying out weighing. The invention has the advantages that: because the material discharging process when the preset quantity approaches a point is weighed through the control of the closing speed of the switch valve, the material weighing time can be greatly reduced, the material proportioning efficiency can be improved, the precision is sampled at intervals, the switching speed is adjusted according to a statistical result, the switching speed of the switch valve can be automatically adjusted, and the material proportioning precision is gradually adjusted according to the statistical result, so that the repeated material discharging and weighing processes in the material weighing process can be greatly reduced, the proportion of reaching the error requirement by one-time weighing is improved, and the material proportioning efficiency is improved.
Description
Technical Field
The invention relates to batching equipment, in particular to a batching control method and a batching control system.
Background
At food processing, all use batching technology in field course of working such as chemical industry batching, need batching, traditional batching process adopts the method of artifical batching to stir ingredients, it carries out the batching to adopt automatic dispensing equipment among the prior art, adopt solenoid valve control unloading usually, and weigh through the electronic scale, constantly circulate through PLC and judge until reaching and predetermineeing the weighing material, this kind of mode need switch baiting valve repeatedly, carry out the judgement and the weighing process of more number of times, consume more time, lead to batching efficiency extremely low. For example, chinese patent publication No. CN107442033A discloses a batching control method and a batching device, which specifically discloses a batching control method, comprising the following operation steps: inputting formula data information by an input platform; calibrating a weighing system of the electronic trolley; planning and controlling a walking route of the electronic trolley; the weighing system of the electronic balance car works, a valve of a storage tank is opened and discharges materials, a mass sensor detects the weight of the materials in real time, and a central control system calculates and judges the detected mass of the raw materials; when the quality of the raw materials does not reach a set value, selecting a corresponding electromagnetic valve to feed the materials; if the quality of the raw materials reaches a set value, closing the electromagnetic valve and stopping feeding; and closing the weighing system, and completing the configuration of the next material according to the walking route of the electronic scale car. The batching method needs more times to open the valve and close the valve, has slow batching speed and low efficiency, and is not beneficial to automatic processing and production.
Disclosure of Invention
The invention aims to provide a batching control method and a batching control system which have the advantages of high batching speed and high efficiency, are beneficial to realizing automatic processing and can realize self-adjustment of batching precision.
In order to solve the technical problems, the technical scheme of the invention is as follows: a batching control method comprises the following steps:
inputting the ingredient amount of each stored material component for each stored material storage tank by a recording device on a control system;
step two, calibrating an electronic scale in an electronic scale groove at the outlet of each storage tank and an electronic scale in an accurate scale groove;
step three, opening a large weighing and feeding valve at the outlet of each material storage tank for storing materials, placing the materials into an electronic weighing tank through the large weighing and feeding valve, weighing by an electronic weighing device positioned at the bottom of the electronic weighing tank, transmitting a weighing result to a control system by the electronic weighing device, continuously judging the weighing result by the control system, simultaneously weighing by the control system for a plurality of times, wherein the weighing number is N, the total weighing number stored in the control system is N, the weighing number is N +1, the preset sampling precision number in the control system is M, if N is equal to the integral multiple of M, entering step four after the weighing meets an error requirement, if N is not equal to M, entering step five after the error requirement is met, if the difference between the judgment result and the preset number is less than the preset switching difference, controlling the large weighing and feeding valve to be closed according to the preset switching speed, and after the large weighing and feeding valves are all closed, if the weighing result received by the control system is within the preset error range, opening the mixing emptying valve to place the weighed materials into the mixing tank for batching, and if the weighing result received by the control system is outside the preset error range and smaller than the preset value, opening the small weighing feeding valve to continue emptying until the small weighing feeding valve is closed within the error range, and placing the weighed materials into the mixing tank for batching by opening the mixing emptying valve;
step four, carrying out accurate weighing calibration, opening a precise emptying valve at the bottom of the electronic weighing tank by a control system, putting the materials into a precise weighing tank, carrying out accurate weighing by a precise weighing device, storing a weighing result into a database by the control system for statistical analysis, and putting the materials into a mixing tank through the emptying valve at the bottom of the precise weighing tank after accurate weighing;
fifthly, the weighed materials of each material storage tank enter a mixing tank, and the mixing tank is conveyed to a processing section through a conveying trolley to finish the material mixing process;
and sixthly, the control system carries out statistics on the average number, the median number and the mode according to the stored precision result, and the control system carries out optimization control on the switching speed of the large weighing and feeding valve according to the statistical results of the average number, the median number and the mode.
Further, the number of times of weighing in the third step is a natural number n greater than 1, and the number of times of sampling precision in the third step is a natural number M greater than 1.
Further, the optimized control process of the switching speed of the large weighing and feeding valve in the step six comprises the following steps;
counting data, when the total weighing times N are equal to integral multiples of the adjusting frequency L, counting the accurate weighing values in the interval corresponding to the adjusting frequency L, and screening out an average value X, a median Y and a mode Z;
selecting reference adjustment parameters, setting Z as reference adjustment parameters if the frequency of Z is greater than or equal to 0.4L, setting X as reference adjustment parameters if the frequency of Z is less than 0.4L and greater than 0.1L, and setting Y as reference adjustment parameters if the frequency of Z is less than 0.1L;
and adjusting the on-off time of the large weighing and feeding valve, if the reference adjustment parameter is smaller than the preset ingredient amount, adjusting the on-off speed by increasing the off time by 0.1a each time, and if the reference adjustment parameter is larger than the preset ingredient amount, adjusting the on-off speed by reducing the off time by 0.1a each time, wherein a is the off time of the preset on-off speed of the large weighing and feeding valve, and the on-off speed of the large weighing and feeding valve is at a constant speed.
Further, the preset switching difference in the third step is 2 times of the absolute value of the error range of the ingredients.
Further, the preset switching speed is set to be equal to the preset switching difference in blanking amount within the switching time, and the switching time is controlled and adjusted by the control system according to the judgment result of the step six.
The invention also aims to provide a batching system applying the batching control method, which comprises a weighing system, a precision system, a control system and a mixing conveyor, wherein the weighing system is communicated with the precision system through a switch valve, the weighing system and the precision system are respectively communicated to the mixing conveyor through the switch valve, the weighing system and the precision system are respectively electrically connected with and controlled by the control system, the feeding part of the weighing system is respectively fed through a large feeding valve and a small feeding valve, and the switching speed of the large feeding valve is controlled by the control system.
Adopt above-mentioned technical scheme, owing to weigh the blowing process when presetting the volume approach point through the closing speed control of control ooff valve, can significantly reduce title material time, can improve batching efficiency, and carry out the smart volume through interval sampling, adjust switching speed according to the statistical result, can realize the switching speed of automatic adjustment ooff valve, and adjust the batching precision according to the statistical result gradually, thereby can significantly reduce the process of title material process blowing repeatedly and weighing, improve once weigh and reach the proportion that the error required promptly, improved batching efficiency.
Drawings
FIG. 1 is a flow chart of a dosing method of the present invention;
fig. 2 is a functional structure diagram of the batching system in the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
Referring to the flowchart of fig. 1, the present embodiment discloses an ingredient control method, which controls ingredients by the following steps:
inputting the ingredient amount of each stored material component for each stored material storage tank by a recording device on a control system; it is feasible, for example, that each storage tank corresponds to a setting component for setting the dosage, which comprises an adjusting button and a liquid crystal display, a controller for the whole control panel is arranged inside, the controller is connected with the control system, and the setting data is stored in a memory of the control system.
And step two, calibrating the electronic weighers in the electronic weighing grooves at the outlets of the material storage tanks and the electronic weighers in the accurate weighing grooves, wherein the electronic weighers can adopt weighing devices such as electronic scales.
Step three, opening a large weighing and feeding valve at the outlet of each material storage tank for storing materials, placing the materials into an electronic weighing tank through the large weighing and feeding valve, weighing by an electronic weighing device positioned at the bottom of the electronic weighing tank, transmitting a weighing result to a control system by the electronic weighing device, continuously judging the weighing result by the control system, simultaneously weighing by the control system for a plurality of times, wherein the weighing number is N, the total weighing number stored in the control system is N, the weighing number is N +1, the preset sampling precision number in the control system is M, if N is equal to the integral multiple of M, entering the step four after the weighing meets the error requirement, if N is not equal to M, entering the step five, assigning N to N after the counting, and controlling the large weighing and feeding valve to be closed according to the preset switching speed when the difference between the weighing judgment result and the preset number is less than the preset switching difference, after the large weighing and feeding valves are completely closed, if the weighing results received by the control system at the moment are within a preset error range, the small weighing and feeding valves are opened to feed the weighed materials into the mixing tank for batching, and if the weighing results received by the control system at the moment are outside the preset error range and are smaller than the preset value, the small weighing and feeding valves are opened to continue to feed until the weighing results are closed within the error range, and the weighed materials are fed into the mixing tank for batching by opening the small weighing and feeding valves. The preset switch difference is 2 times of the absolute value of the error range of the ingredients, for example, when the ingredient amount is 100g and the error is 1g, the preset switch difference can be set to be 2g, the preset closing time of the switch valve is 1s, the blanking amount in the switch valve 1s is 2g under the ingredient amount, when the weighing result in the weighing tank is more than 98g, the large feeding valve begins to be closed according to the preset speed, when the system initially operates, the time is uniformly closed for 1s, the discharging and weighing can be completed if the weighing result after the closing is within the range of 99-101g, if the weighing result is not within the range of 99-101g and is less than 99g, a small amount of discharging is performed by opening the small feeding valve, the discharging mode can be intermittent discharging, one drop is discharged each time, the weighing is performed until the weighing is more than 99g, the weighing is completed, the weighing result is more than 101g, at this time, the control system directly judges that the closing speed of the large feeding valve is too slow, and controlling the closing speed of the material weighing device to reduce by 0.1s, judging that the material weighing fails, discharging the material to the ingredient collecting bin for returning to the storage tank for re-weighing, waiting for weighing in other ingredient tanks at the moment, and waiting for successful material weighing in situ in a mixing tank at the bottom until the material weighing is completed. In the embodiment, the sampling precision number can be set to be 10, namely, every 10 times, the weighed materials are discharged into the precise weighing tank through the valve at the bottom and weighed by the precise weighing device, the weighing precision of the precise weighing device is greater than that of the weighing device in the weighing tank, and the weighing time is greater than the weighing time. And conveying the precision material to a batching collection bin or a mixing tank according to an error judgment result.
Step four, carrying out accurate weighing calibration, opening a precise emptying valve at the bottom of the electronic weighing tank by a control system, putting the materials into a precise weighing tank, carrying out accurate weighing by a precise weighing device, storing a weighing result into a database by the control system for statistical analysis, and putting the materials into a mixing tank through the emptying valve at the bottom of the precise weighing tank after accurate weighing;
and step five, the weighed materials of each storage tank enter a mixing tank, the mixing tank is conveyed to a processing section through a conveying trolley to complete the material mixing process, the mixing tanks can be arranged in a plurality of modes, the circulation is carried out on a material mixing line, and the trolley is turned over to feed the materials after the materials reach the processing section.
And sixthly, the control system carries out statistics on the average number, the median number and the mode according to the stored precision result, and the control system carries out optimization control on the switching speed of the large weighing and feeding valve according to the statistical results of the average number, the median number and the mode.
In other embodiments of the present invention, the number n of weighing in step three may be other natural numbers greater than 1, and the number M of sampling precision in step three is a natural number greater than 1.
Preferably, the optimized control process of the switching speed of the large weighing and feeding valve in the step six comprises the following steps;
counting data, when the total weighing times N are equal to integral multiples of the adjusting frequency L, counting the accurate weighing values in the interval corresponding to the adjusting frequency L, and screening out an average value X, a median Y and a mode Z; for example, in this embodiment, the adjustment frequency may be 100 times, that is, the statistical average value X, the median Y, and the mode Z are performed for each 100 times of weighing data.
Selecting reference adjustment parameters, setting Z as reference adjustment parameters if the frequency of Z is greater than or equal to 0.4L, setting X as reference adjustment parameters if the frequency of Z is less than 0.4L and greater than 0.1L, and setting Y as reference adjustment parameters if the frequency of Z is less than 0.1L; in this embodiment, the average value, the median, and the mode are values obtained by taking a 1-bit decimal point, for example, 99.5g, and may be parameters that adopt the mode as an adjustment parameter when the frequency of the mode is greater than 40, and adopt the average value as an adjustment reference when the frequency of the mode is less than 40.
And adjusting the on-off time of the large weighing and feeding valve, if the reference adjustment parameter is smaller than the preset ingredient amount, adjusting the on-off speed by increasing the off time by 0.1a each time, and if the reference adjustment parameter is larger than the preset ingredient amount, adjusting the on-off speed by reducing the off time by 0.1a each time, wherein a is the off time of the preset on-off speed of the large weighing and feeding valve, and the on-off speed of the large weighing and feeding valve is at a constant speed. In this embodiment, the adjustment may be performed by 0.1s per increment or decrement.
Because the material discharging process when the preset quantity approaches a point is weighed through the control of the closing speed of the switch valve, the material weighing time can be greatly reduced, the material proportioning efficiency can be improved, the precision is sampled at intervals, the switching speed is adjusted according to a statistical result, the switching speed of the switch valve can be automatically adjusted, and the material proportioning precision is gradually adjusted according to the statistical result, so that the repeated material discharging and weighing processes in the material weighing process can be greatly reduced, the proportion of reaching the error requirement by one-time weighing is improved, and the material proportioning efficiency is improved.
Example 2
Referring to fig. 2, the present embodiment discloses a batching system applying the batching control method in embodiment 1, which includes a weighing system, a precision system, a control system and a mixing conveyor, wherein the weighing system is communicated with the precision system through a switch valve, the weighing system and the precision system are respectively communicated to the mixing conveyor through the switch valve, the weighing system and the precision system are respectively electrically connected with and controlled by the control system, the feeding portion of the weighing system is respectively fed through a large feeding valve and a small feeding valve, and the switching speed of the large feeding valve is controlled by the control system. In addition, weighing system, smart volume system can also communicate to the feed back storehouse through the ooff valve for the material that will weigh the over-range returns to the storage tank. The operation principle and the control method of the system are as in embodiment 1.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (6)
1. A batching control method is characterized by comprising the following steps of:
inputting the ingredient amount of each stored material component for each stored material storage tank by a recording device on a control system;
step two, calibrating an electronic scale in an electronic scale groove at the outlet of each storage tank and an electronic scale in an accurate scale groove;
step three, opening a large weighing and feeding valve at the outlet of each material storage tank for storing materials, placing the materials into an electronic weighing tank through the large weighing and feeding valve, weighing by an electronic weighing device positioned at the bottom of the electronic weighing tank, transmitting a weighing result to a control system by the electronic weighing device, continuously judging the weighing result by the control system, simultaneously weighing by the control system for a plurality of times, wherein the weighing time is N, the total weighing time stored in the control system is N, the weighing time is N +1, the preset sampling precision time in the control system is M, if N is equal to the integral multiple of M, entering the step four after the weighing meets the error requirement, if N is not equal to M, entering the step five, assigning N to N after the counting, and controlling the large weighing and feeding valve to be closed according to the preset switching speed when the difference between the weighing result and the preset quantity is smaller than the preset switching difference, when the large weighing and feeding valves are completely closed, if the weighing result received by the control system is within a preset error range, the small weighing and feeding valves are opened to feed the weighed materials into the mixing tank for proportioning, if the weighing result received by the control system is outside the preset error range and is smaller than the preset value, the small weighing and feeding valves are opened to continue to feed the materials until the small weighing and feeding valves are closed within the error range, the weighed materials are fed into the mixing tank for proportioning or are returned to the material storage tank by opening the small weighing and feeding valves, and if the weighing result is larger than the maximum error value, the weighed materials are returned to the material storage tank;
step four, carrying out accurate weighing calibration, opening a precise emptying valve at the bottom of the electronic weighing tank by a control system, putting the materials into a precise weighing tank, accurately weighing the materials by a precise weighing device, storing weighing results into a database by the control system for statistical analysis, and putting the materials into a mixing tank or returning the materials to a material storage tank through the emptying valve at the bottom of the precise weighing tank after accurate weighing;
fifthly, the weighed materials of each material storage tank enter a mixing tank, and the mixing tank is conveyed to a processing section through a conveying trolley to finish the material mixing process;
and sixthly, the control system carries out statistics on the average number, the median number and the mode according to the stored precision result, and the control system carries out optimization control on the switching speed of the large weighing and feeding valve according to the statistical results of the average number, the median number and the mode.
2. The compounding control method according to claim 1, wherein: and the weighing counting in the third step is a natural number with n being more than 1, and the preset sampling precision counting in the third step is a natural number with M being more than 1.
3. The compounding control method according to claim 2, wherein: the optimized control process of the switching speed of the large weighing and feeding valve in the sixth step comprises the following steps;
counting data, when the total weighing times N are equal to integral multiples of the adjusting frequency L, counting the accurate weighing values in the interval corresponding to the adjusting frequency L, and screening out an average value X, a median Y and a mode Z;
selecting reference adjustment parameters, setting Z as reference adjustment parameters if the frequency of Z is greater than or equal to 0.4L, setting X as reference adjustment parameters if the frequency of Z is less than 0.4L and greater than 0.1L, and setting Y as reference adjustment parameters if the frequency of Z is less than 0.1L;
and adjusting the on-off time of the large weighing and feeding valve, if the reference adjustment parameter is smaller than the preset ingredient amount, adjusting the on-off speed by increasing the off time by 0.1a each time, and if the reference adjustment parameter is larger than the preset ingredient amount, adjusting the on-off speed by reducing the off time by 0.1a each time, wherein a is the off time of the preset on-off speed of the large weighing and feeding valve, and the on-off speed of the large weighing and feeding valve is at a constant speed.
4. The compounding control method according to claim 3, wherein: and the preset switch difference in the third step is 2 times of the absolute value of the error range of the ingredients.
5. The compounding control method according to claim 4, wherein: and setting the preset switching speed to be equal to the preset switching difference in blanking amount within the switching time, and controlling and adjusting the switching time by the control system according to the judgment result of the step six.
6. A batching system applying the batching control method according to claim 1, characterized in that: the weighing system is communicated with the precision system through a switch valve, the weighing system and the precision system are communicated to the mixing conveyor through the switch valve respectively, the measuring system and the precision system are electrically connected with and controlled by the control system respectively, the feeding part of the weighing system feeds materials through a large feeding valve and a small feeding valve respectively, and the switching speed of the large feeding valve is controlled by the control system.
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| CN201910929899.8A CN110585984A (en) | 2019-09-29 | 2019-09-29 | Batching control method and system |
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| CN201910929899.8A CN110585984A (en) | 2019-09-29 | 2019-09-29 | Batching control method and system |
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Application publication date: 20191220 |