CN102494746A - System and method for material weighing and weighing controller - Google Patents

System and method for material weighing and weighing controller Download PDF

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Publication number
CN102494746A
CN102494746A CN201110396955XA CN201110396955A CN102494746A CN 102494746 A CN102494746 A CN 102494746A CN 201110396955X A CN201110396955X A CN 201110396955XA CN 201110396955 A CN201110396955 A CN 201110396955A CN 102494746 A CN102494746 A CN 102494746A
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CN
China
Prior art keywords
weighing
scale
value
butterfly valve
screw machine
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CN201110396955XA
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Chinese (zh)
Inventor
齐华
王子劼
万博
邓小梅
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中联重科股份有限公司
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Priority to CN201110396955XA priority Critical patent/CN102494746A/en
Publication of CN102494746A publication Critical patent/CN102494746A/en

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Abstract

The invention discloses a system and a method for material weighing and a weighing controller. The material weighing system comprises a weighing hopper (40), a spiral conveyor (20), a butterfly valve (30) and a weighing sensor (50). A conveying outlet of the spiral conveyor (20) is located above an opening of the weighing hopper (40), the butterfly valve (30) is located at the conveying outlet of the spiral conveyor (20), and when the butterfly valve (30) is closed, the conveying outlet of the spiral conveyor (20) is sealed. The weighing controller (60) comprises a weight obtaining device (61), a comparison device (62) and a control signal output device (63), wherein the weight obtaining device (61) is used for receiving a signal for indicating weight of materials in the weighing hopper (40) and obtaining real-time weight of the materials from the signal, the comparison device (62) is used for comparing the real-time weight of the materials with a predicting weighing value, and the control signal output device (63) is used for simultaneously outputting a control signal for controlling the stopping of the spiral conveyor (20) and a control signal for closing the butterfly valve (30) when the comparison result of the comparison device (62) is that the real-time weight reaches the predicting weighing value. When the materials reach a certain value, the spiral conveyor and the butterfly valve can be closed simultaneously, thereby obtaining double advantages of good conveying effect of the spiral conveyor and fast response of the butterfly valve.

Description

Material weighing system and method and weighing controller
Technical field
The present invention relates to the material weighing field, particularly, the weighing controller that relates to a kind of material weighing system, material weighing method and be used for this material weighing system.
Background technology
Weighing to weight of material at present generally has dual mode.A kind of is to adopt two butterfly valves to carry, and promptly the end at conveyance conduit is provided with two butterfly valves.Two butterfly valves are all opened, can be realized the maximum delivery passage, when the approaching expectation of weighing value weighing value, close one of them butterfly valve then, make the conveying outlet of material diminish, so that the precision of control weighing is closed another butterfly valve at last again.But this mode relies on the gravity of material fully when convey materials, therefore, for the not good powder of flowability, can not realize even feeding, and giving weighs makes troubles.A kind of in addition is to adopt screw machine to carry, and the outlet of screw machine directly links to each other with scale hooper, because screw machine has expulsive force, so for the not good powder of flowability the good transportation effect is arranged.
Yet, when adopting screw machine to carry, when needs stop to carry; Screw machine more also can remain in operation a period of time owing to inertia; So screw machine still can be constantly to the scale hooper convey materials during this period of time, cause actual weighing value and estimate between the weighing value variantly, produce weighing error.
Therefore; In the prior art, as adopt two butterfly valves then because can not even feeding, weighing precision be difficult to guarantee; As adopt screw machine can have bigger weighing error again, often do not reach requirement for the weighing of the very high material of some accuracy requirements (like dry powder and mortar).
Summary of the invention
The objective of the invention is to the above-mentioned deficiency that exists in the prior art, provide a kind of can even feeding and high again material weighing system, the material weighing method of measuring accuracy, and the weighing controller that is used for this material weighing system.
The present invention provides a kind of material weighing system; Comprise scale hooper, screw machine, butterfly valve and LOAD CELLS; LOAD CELLS is used for detecting the real-time weight of scale hooper material; The conveying outlet of screw machine is positioned at the opening top of scale hooper, and butterfly valve is positioned at the conveying exit of screw machine, the conveying outlet of sealing screw machine when butterfly valve cuts out.
In addition, the present invention also provides a kind of weighing controller that is used for this material weighing system, and this weighing controller comprises: weight deriving means, the real-time weight that is used for receiving the signal of the weight of indicating the scale hooper material and therefrom obtains material; Comparison means is used for the real-time weight of material is compared with estimating the weighing value; The control signal output unit, when being used for comparative result when comparison means and being real-time weight and reaching this expectation weighing value, control signal that the screw machine of output control simultaneously stops and the control signal of closing butterfly valve.
In addition, the present invention also provides a kind of method of using above-mentioned material weighing system to carry out material weighing, may further comprise the steps: start screw machine and also open butterfly valve and carry out mass transport; Weight to material in the scale hooper is carried out real-time weighing; The real-time weight that institute's weighing is obtained material is compared with estimating the weighing value; When comparative result is that real-time weight reaches when estimating the weighing value, stop screw machine and close butterfly valve simultaneously.
Through technique scheme, when the material in the detected scale hooper of LOAD CELLS reaches certain value, can close screw machine and butterfly valve simultaneously, there are preferable conveying effect and butterfly valve to respond two-fold advantage faster thereby had screw machine concurrently.That is to say that though screw machine is because former the carrying on as before of inertia remains in operation at this moment, owing to carry outlet to be closed by butterfly valve, so material can't fall into scale hooper to cause weighing error, weighing is accurate, and is simple to operate.According to preferred implementation of the present invention, also provide syllogic to mend the scale method, weighing is more accurate.
Other features and advantages of the present invention will partly specify in embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with following embodiment, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the structural drawing of material weighing provided by the invention system;
Fig. 2 is the structured flowchart of weighing controller provided by the invention;
Fig. 3 is the process flow diagram of material weighing method provided by the invention.
Description of reference numerals
10 feed bins, 20 screw machines
30 butterfly valves, 40 scale hoopers
50 LOAD CELLSs, 60 weighing controllers
61 weight deriving means, 62 comparison means
63 control signal output units 64 are mended the scale judgment means
The M drive motor
Embodiment
Be elaborated below in conjunction with the accompanying drawing specific embodiments of the invention.Should be understood that embodiment described herein only is used for explanation and explains the present invention, is not limited to the present invention.
As shown in Figure 1, material weighing provided by the present invention system is at first described.This system comprises scale hooper 40, screw machine 20, butterfly valve 30 and LOAD CELLS 50; LOAD CELLS 50 is used for detecting the real-time weight of scale hooper 40 materials; The conveying outlet of screw machine 20 is positioned at the opening top of scale hooper 40; Butterfly valve 30 is positioned at the conveying exit of screw machine 20, the conveying outlet of sealing screw machine 20 when butterfly valve 30 cuts out.
In Fig. 1, the conveying of screw machine 20 inlet is connected to feed bin 10, to receive material, can certainly be connected to unclassified stores storage or conveyer (like belt feeder or batcher etc.), and the present invention does not limit this.Preferably be provided with valve between the conveying inlet of screw machine 20 and the feed bin 10 among Fig. 1, this valve is opened when the beginning weighing, and when stopping screw machine 20 chargings, closes, and enters into screw machine 20 to avoid too much material.
Wherein, screw machine 20 can adopt various screw machines, and the present invention does not limit its structure.In general, the structure of screw machine 20 comprises spiral pipe, by drive motor drives; In Fig. 1, illustrate with M; This drive motor M has driving signal input, and controls the running of screw machine 20 according to control signal, comprises startup, stops, rotating speed, direction or the like.
Butterfly valve 30 can be the butterfly valve of various structures, does not do special restriction.The present invention does not do special restriction to the butterfly valve 30 and the position relation of screw machine 20 yet, as long as when butterfly valve 30 cuts out, can seal the conveying outlet of screw machine 20, generally butterfly valve 30 be positioned at that the conveying of screw machine 20 exports under.The present invention can adopt the butterfly valve of various driving types, for example pneumatic, surge, electronic, electric-as to surge, solution-air is moving or the like, butterfly valve 30 has control end, and opens or close according to the control signal that control end receives.
LOAD CELLS 50 can be selected conventional LOAD CELLS for use, in order to detect the weight of material in the scale hooper 40, has signal output part, is used for exporting the signal of the weight of indicating scale hooper 40 materials.LOAD CELLS 50 can have a plurality of, shown in the figure 2.Under the preferable case; Because the weight of material signal that LOAD CELLS 50 records is less, this material weighing system can also comprise transmitter (not shown), is connected the signal output part of LOAD CELLS 50; LOAD CELLS 50 is via this transmitter output signal, in order to amplify the weight of material signal.
Use this material weighing provided by the invention system to carry out weighing; When the material in the LOAD CELLS 50 detected scale hoopers 40 reaches certain value; Can close screw machine 20 and butterfly valve 30 simultaneously, have preferable conveying effect and butterfly valve 30 to respond two-fold advantage faster thereby had screw machine 20 concurrently.That is to say, though screw machine 20 is closed by butterfly valve 30 owing to carry to export, so material can't fall into scale hooper 40 to cause weighing error because former the carrying on as before of inertia remains in operation at this moment.
This material weighing provided by the invention system can adopt manual control, but in industry, for the ease of manipulating, preferably still adopts control automatically.Therefore; According to preferred implementation provided by the invention; This material weighing system can also comprise weighing controller 60; This weighing controller 60 is electrically connected with the signal output part of LOAD CELLS 50, the driving signal input of screw machine 20 and the control end of butterfly valve 30, in order to receiving the signal of weight that is used for indicating scale hooper 40 materials from LOAD CELLS 50, and the control signal of the control signal of output control screw machine 20 and control butterfly valve 30.According to preferred embodiment, this weighing controller 60 can also be electrically connected (shown in dotted line among Fig. 1) with the control end of the valve of screw machine 20 porch, to control the opening and closing of this valve.
Introduce weighing controller 60 provided by the invention in detail below in conjunction with Fig. 2.As shown in Figure 2, this weighing controller 60 comprises: weight deriving means 61, the real-time weight that is used for receiving the signal of the weight of indicating scale hooper 40 materials and therefrom obtains material; Comparison means 62 is used for the real-time weight of material is compared with estimating the weighing value; Control signal output unit 63, when being used for comparative result when comparison means 62 and being real-time weight and reaching said expectation weighing value, control signal that the screw machine 20 of output control simultaneously stops and the control signal of closing butterfly valve 30.
Wherein, said weight deriving means 61 can be connected with LOAD CELLS 50, to receive LOAD CELLS 50 detected signals and to obtain real-time weight, and for example can be for analog to digital converter etc.Because it is a plurality of that LOAD CELLS 50 can have, so weight deriving means 61 receives a plurality of signals, and adopt according to a plurality of signals and for example to average scheduling algorithm to obtain the real-time weight of material.
Said comparison means 62 can be realized through computer program, is used for the real-time weight of material is compared with estimating the weighing value, and the output comparative result.
Said expectation weighing value is generally the proportioning value and deducts the drop value; The proportioning value is the final conceivable weight of material of this weighing, and the drop value is when the material weighing system stops charging, (to be in the present invention when closing screw machine 20 and butterfly valve 30) and in the pipeline of carrying between outlet and the scale hooper 40, is in the course of conveying but is not loaded into the weight of the clout on the LOAD CELLS 50 as yet.For example, suppose that the proportioning value is 500kg, the drop value is 50kg, estimates that then the weighing value is 450kg.That is to say, when LOAD CELLS 50 detected weight of material reach 450kg, stop screw machine 20 and close butterfly valve 30, this moment in theory, when material all fall stable after, the weight of material in the scale hooper 40 should be near 500kg.
Above-mentioned drop value can adopt fixedly drop or free drop, and so-called fixedly drop is meant a fixed value is set, and all uses this fixed value during each weighing, and this fixed value generally can record or through estimating that weight of material obtains in the pipeline through experiment.And free drop is meant the ever-increasing factor of material in the scale hooper 40 of considering and drop value during each weighing be provided with and inequality, be constantly to revise according to the actual weight of the material in the scale hooper 40.The makeover process of free drop is that the drop value that adopted during at first with first time weighing is as initial drop value, then the drop value=initial drop value of (actual weight-proportioning value)/2+ of weighing for the second time.Expectation weighing value when deducting this drop value and promptly obtain weighing for the second time with the proportioning value then.For example, the proportioning value is 500kg, and initial drop value is 50kg, and the expectation weighing value when weighing for the first time stops to should be 450kg, and after treating that material makes a decision, actual weight possibly be 480kg, and the drop value when weighing for the second time is (480-500)/2+50=40kg.Can use last drop value to upgrade this drop value when carrying out weighing later at every turn.
Said control signal output unit 63 is used to export the various control signals of the whole weighing process of control; The control signal that comprises screw machine 20 (comprises the unlatching of controlling screw machine 20, stops the control signal with rotating speed; Be generally simulating signal), the control signal (control signal that comprises the opening and closing of controlling butterfly valve 30 of butterfly valve 30; Be generally digital signal), said control signal output unit 63 comprises the output circuit of exporting control signals to the output circuit of screw machine 20 output control signals and to butterfly valve 30.Under the preferable case, can also export the control signal of the conveying porch valve that is used to control screw machine 20, when 20 runnings of control screw machine; The control signal of this valve opening of output control simultaneously; Otherwise, when control screw machine 20 stops, the control signal of this valve closing of output control simultaneously.
This control signal output unit 63 also is used for when the beginning material weighing, and the control signal of screw machine 20 control of turning signals and opened butterfly valve 30 is controlled in output simultaneously, to open the maximum delivery passage; When reaching, real-time weight exports control signal that control screw machine 20 stops and the control signal of closing butterfly valve 30 when estimating the weighing value simultaneously then, to close transfer passage.
In order in course of conveying, to reach maximum delivery efficient as far as possible; Under the preferable case, said control signal output unit 63 is that the real-time weight of material moves closer to the control signal that output reduces screw machine 20 rotating speeds in the process of estimating the weighing value at the comparative result of comparison means 62.Wherein depend on real-time weight and the degree of closeness of estimating the weighing value opportunity of the control signal that reduces of output speed, can be provided with voluntarily according to the production needs.The degree that rotating speed reduces is exceeded can not cause big weighing error.
For example, control signal output unit 63 is connected to the drive motor M of screw machine 20 through a frequency converter, in order to the travelling speed of control screw machine 20.When the beginning weighing, can export control signal and make frequency converter output high-frequency signal (like 40-50Hz); Thereby so that screw machine 20 rotates at a relatively high speed; Strengthen transporting velocity, and when the weighing of the approaching expectation of weight in real time value, make frequency converter output low frequency signal (like 10-20Hz); So that screw machine 20 is to rotate than low velocity, in order to avoid cause bigger weighing error.
In theory, when control signal output unit 63 stopped screw machine 20 and closes butterfly valve 30, the weight of material in the scale hooper 40 should be near the proportioning value.But in fact; Because material falls LOAD CELLS 50 being produced impact, so LOAD CELLS 50 detected weight of material may be bigger than normal than actual value, is example with top example still; When LOAD CELLS 50 detected weight of material reach 450kg; This moment, actual weight might not be 450kg, may be less than 450kg, and Here it is so-called " owing scale ".Generally speaking, can occur owing scale in the actual weighing process unavoidably, therefore, under the preferable case, the present invention has also increased benefit scale function, and so-called " benefit scale " is meant that after stopping charging charging is owed the weighing error that scale is caused to remedy once more.Therefore; Increasing benefit scale function in this case; Above-mentioned predetermined weighing value also can be called " thick title value "; After reaching this thick title value, treat weight of material stable (promptly be in material in the course of conveying all fall in the scale hooper 40 after), next can judge whether to need to mend scale (also can be called " smart scale ").
Therefore; According to preferred implementation of the present invention, said weighing controller 60 can also comprise mends scale judgment means 64, be used for said control signal output unit 63 export simultaneously control control signal that screw machine 20 stops and the control signal of closing butterfly valve 30 after; Calculate the proportioning value of material and the difference X (absolute value) between the weight in real time and this difference is compared with a permissible error value A so that judge whether need the benefit scale; When this difference X during greater than said permissible error value A judgement need to mend scale, when difference X is less than or equal to permissible error value A, think that then weighing is accurately; Judge and need not mend scale, weighing this moment finishes.Wherein, permissible error value A can set according to the patient weighing error of each weighing.
Next, when 64 judgements of benefit scale judgment means needed to mend scale, can restart charging to mend scale this moment.Because material weighing used in the present invention system has screw machine 20 and butterfly valve 30 simultaneously, so also can adopt dual mode when mending scale.A kind of is when mending 64 judgement of scale judgment means when needing to mend scale, and the control signal of said control signal output unit 63 output opened butterfly valves 30 to be mending scale, and after after a while, exports the control signal of closing butterfly valve 30.Because when butterfly valve 30 cuts out for the first time; Though screw machine 20 has received the control signal that stops; But still can rotate, at this moment a spot of material of carrying of screw machine 20 is just stored in spiral pipe, and if butterfly valve 30 is opened once more; Then material can flow into the scale hooper 40 from spiral pipe, thereby reaches the effect of feed supplement.The time span (being above-mentioned a period of time) that butterfly valve 30 is opened is directly proportional with mending the scale value, and wherein mending the scale value is the difference between difference X and the permissible error value A.
Generally in actual production, benefit scale value is not too large, generally is slightly larger than permissible error value A, so use above-mentioned benefit scale method just can satisfy accuracy requirement.But,,, owe scale and still do not solved fully so, also still can not satisfy the requirement of benefit scale even these inventories all fall into scale hooper 40 if benefit scale value is excessive because the inventory of storing in the spiral pipe is limited.So, can also adopt the following second way, i.e. " syllogic is mended the scale method ".At first, mending scale judgment means 64 needs whether need mend scale and judges that to mend the scale value greatly still little, mends scale if desired and mends the scale value hour; Then only opened butterfly valve 30 is mended scale on a small quantity; The same with first kind of mode, and mend scale if desired and mend the scale value bigger, then opened butterfly valve 30 and screw machine 20 simultaneously; Just once more with the charging of maximum delivery passage, to reach the purpose of a large amount of benefit scales.Therefore; In this case, mend scale judgment means 64 except with above-mentioned difference X with permissible error value A compares, also this difference X is compared with a critical value B (critical value B is greater than permissible error value A); When this difference X during greater than said critical value B judgement need a large amount of scales of mending; And be less than or equal to said critical value B and judge a small amount of scale of mending of needs during greater than said permissible error value A as this difference X, and when this difference was less than or equal to said permissible error value A, then judgement need not mended scale; Weighing finishes, so be referred to as " syllogic is mended the scale method ".Wherein critical value B is the clout weight in the screw machine 20; Be screw machine 20 after receiving the control signal that stops because inertia continues rotation clout in the spiral pipe that is stored in when stopping fully, this value can be through the experiment acquisition behind given screw machine, given material.
At this moment; When said benefit scale judgment means 64 judgements need to mend scale in a large number; The control signal of said control signal output unit 63 output control screw machine 20 control of turning signals and opened butterfly valve 30; And when said difference X is less than or equal to permissible error value A, control signal that the screw machine 20 of output control simultaneously stops and the control signal of closing butterfly valve 30.
And when said benefit scale judgment means 64 judgements need be mended scale on a small quantity, the control signal of output opened butterfly valve 30 was also exported the control signal of closing butterfly valve 30 after after a while.A small amount of when mending scale when adopting, the opening time length of butterfly valve 30 is set according to mending the scale value as stated in proportion, and when adopting a large amount of benefit scale, and is the same during with regard to the weighing in front, will consider that equally the drop value controls feed time.When mending scale in a large number; Calculate during the control feed time and still will consider the drop value, exceed standard, when control screw machine 20 is opened for fear of mending scale; The control signal of preferred output control screw machine 20 low-speed runnings; Therefore, the drop value during than weighing the drop value less than normal, the drop value in the time of for example can getting weighing half the.A large amount of possibly secondary also can occur when mending scale and owe scale, that is to say that at this moment the proportioning value of mending material behind the scale and the difference X between the weight in real time can carry out secondary benefit scale still greater than permissible error value A.The process that secondary is mended scale is with once to mend scale the same.
Above-mentioned weighing controller 60 can pass through controllers such as single-chip microcomputer, PLC to be realized through computer program.
Import said ratio value, drop value, permissible error value A, critical value B for the ease of the user; Material weighing provided by the invention system can also comprise input media (not shown); Be used to import proportioning value, drop value and permissible error value A (optional), critical value B (optional); And the comparison means 62 in the weighing controller 60 calls proportioning value and drop value to obtain said expectation weighing value, mends scale judgment means 64 and calls permissible error value A and critical value B in order to need to judge whether the benefit scale.This input media can be touch-screen.
The present invention as shown in Figure 3 also provides a kind of method of using above-mentioned material weighing system to carry out material weighing, and this method may further comprise the steps: start screw machine 20 and also open butterfly valve 30 and carry out mass transport; Weight to material in the scale hooper 40 is carried out real-time weighing; The real-time weight that institute's weighing is obtained material is compared with estimating the weighing value; When comparative result is that real-time weight reaches when estimating the weighing value, stop screw machine 20 and close butterfly valve 30 simultaneously.
Wherein said expectation weighing value deducts the drop value for the proportioning value.The definition of proportioning value and drop value and setting are repeated no more as previously mentioned.
Equally, in order to raise the efficiency and avoid weighing error excessive, be that the real-time weight of material moves closer to the rotating speed that reduces screw machine 20 in the process of estimating the weighing value wherein at comparative result.
Under the preferable case, the benefit scale function that this method also provides.A kind of embodiment is that this method also comprises: after stopping screw machine 20 and closing butterfly valve 30 simultaneously, once more the real-time weight of material in the scale hooper 40 is carried out weighing; Calculate the proportioning value of material and the difference X between the weight in real time and this difference X is compared with a permissible error value A so that judge whether need the benefit scale; As this difference X during greater than said permissible error value A, judgement needs to mend scale, and opened butterfly valve 30 is mended scale, and after after a while, closes butterfly valve 30; When this difference X is less than or equal to permissible error value A, judge and need not mend scale that weighing finishes.
Another kind of embodiment is as shown in Figure 3, mends the scale method for the syllogic of top introduction, and this method also comprises: after stopping screw machine 20 and closing butterfly valve 30 simultaneously, once more the real-time weight of material in the scale hooper 40 is carried out weighing; Calculate the proportioning value of material and the difference X between the weight in real time and this difference X is compared with a permissible error value A and a critical value B greater than said permissible error value A compares so that judge whether need the benefit scale; As this difference X during greater than said critical value B, judgement needs a large amount of scales of mending, then start screw machine 20 and simultaneously opened butterfly valve 30 mend scale, and when said difference X is less than or equal to said permissible error value A, stops screw machine 20 simultaneously and close butterfly valve 30; When this difference X is less than or equal to said critical value B and during greater than said permissible error value A, judgement needs a small amount of scale of mending, then only opened butterfly valve 30 is mended scale, and after after a while, closes butterfly valve 30; When this difference X is less than or equal to said permissible error value A, judge and need not mend scale that weighing finishes.
The above a period of time is directly proportional with mending the scale value, and mending the scale value is the difference between said difference X and the permissible error value A.Equally, when mending scale in a large number, calculate during the control feed time and still will consider the drop value; Exceed standard for fear of mending scale, when control screw machine 20 is opened, preferably control screw machine 20 low-speed runnings; Therefore, the drop value during than weighing the drop value less than normal, the drop value in the time of for example can getting weighing half the.
Identical when the weighing controller 60 of material weighing system is introduced in the process of mending scale and front, no longer repeat to give unnecessary details.
More than combine accompanying drawing to describe preferred implementation of the present invention in detail; But; The present invention is not limited to the detail in the above-mentioned embodiment; In technical conceive scope of the present invention, can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
Need to prove in addition; Each concrete technical characterictic described in above-mentioned embodiment under reconcilable situation, can make up through any suitable manner; For fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be regarded as the disclosed content of the present invention equally.

Claims (16)

1. weighing controller (60) that is used for the material weighing system; Said material weighing system comprises scale hooper (40), screw machine (20), butterfly valve (30) and LOAD CELLS (50); The conveying outlet of screw machine (20) is positioned at the opening top of scale hooper (40); Butterfly valve (30) is positioned at the conveying exit of screw machine (20), and butterfly valve (30) seals the conveying outlet of screw machine (20) when cutting out, and this weighing controller (60) comprising:
Weight deriving means (61), the real-time weight that is used for receiving the signal of the weight of indicating scale hooper (40) material and therefrom obtains material;
Comparison means (62) is used for the real-time weight of material is compared with estimating the weighing value;
Control signal output unit (63), when being used for comparative result when comparison means (62) and being real-time weight and reaching this expectation weighing value, the control signal that stops of output control screw machine (20) and the control signal of closing butterfly valve (30) simultaneously.
2. controller according to claim 1, wherein said expectation weighing value deducts the drop value for the proportioning value.
3. weighing controller according to claim 1 (60), wherein said control signal output unit (63) also are used for when the beginning material weighing, simultaneously the control signal of output control screw machine (20) control of turning signal and opened butterfly valve (30).
4. weighing controller according to claim 1 (60), wherein said control signal output unit (63) are that the real-time weight of material moves closer to the control signal that output reduces screw machine (20) rotating speed in the process of estimating the weighing value at the comparative result of comparison means (62).
5. weighing controller according to claim 1 (60), wherein said weighing controller (60) also comprises:
Mend scale judgment means (64); Be used for after the control signal that said control signal output unit (63) is exported the control signal that stops of control screw machine (20) simultaneously and closed butterfly valve (30); Calculate the proportioning value of material and the difference X between the weight in real time and this difference X is compared with a permissible error value A so that judge whether need the benefit scale; When this difference X during greater than said permissible error value A judgement need to mend scale, when difference X is less than or equal to permissible error value A, judge and need not mend scale; And
Said control signal output unit (63) also is used for when mending scale judgment means (64) judgement needs benefit scale, the control signal of output opened butterfly valve (30), and after after a while, export the control signal of closing butterfly valve (30).
6. weighing controller according to claim 1 (60), wherein said weighing controller (60) also comprises:
Mend scale judgment means (64); Be used for after the control signal that said control signal output unit (63) is exported the control signal that stops of control screw machine (20) simultaneously and closed butterfly valve (30); Calculate the proportioning value of material and the difference X between the real-time weight; And this difference X compared with a permissible error value A and a critical value B greater than said permissible error value A; When this difference X during greater than said critical value B judgement need a large amount of scales of mending, when this difference X is less than or equal to said critical value B and judges a small amount of scale of mending of needs during greater than said permissible error value A, judgement need not mended scale when this difference X is less than or equal to said permissible error value A;
Said critical value B is the clout weight in the screw machine (20).
7. weighing controller according to claim 6 (60); Wherein said control signal output unit (63) also is used for when said benefit scale judgment means (64) is judged a large amount of benefit of needs scale; The control signal of output control screw machine (20) control of turning signal and opened butterfly valve (30) and when said difference X is less than or equal to said permissible error value A, the control signal that stops of output control screw machine (20) and the control signal of closing butterfly valve (30) simultaneously; And when said benefit scale judgment means (64) judgement need be mended scale on a small quantity, the control signal of output opened butterfly valve (30) was also exported the control signal of closing butterfly valve (30) after after a while.
8. according to claim 5 or 7 described weighing controllers (60), wherein said a period of time is directly proportional with mending the scale value, and mending the scale value is the difference between said difference X and the permissible error value A.
9. material weighing system; Comprise scale hooper (40), screw machine (20), butterfly valve (30) and LOAD CELLS (50); LOAD CELLS (50) is used for detecting the real-time weight of scale hooper (40) material; The conveying outlet of screw machine (20) is positioned at the opening top of scale hooper (40), and butterfly valve (30) is positioned at the conveying exit of screw machine (20), and butterfly valve (30) seals the conveying outlet of screw machine (20) when cutting out.
10. material weighing according to claim 9 system; This system comprises also that according to the described weighing controller (60) that is used for the material weighing system of each claim among the claim 1-8 this weighing controller (60) is electrically connected with the signal output part of LOAD CELLS (50), the driving signal input of screw machine (20) and the control end of butterfly valve (30).
11. a method of using claim 9 or 10 described material weighing systems to carry out material weighing may further comprise the steps:
Startup screw machine (20) is also opened butterfly valve (30) and is carried out mass transport;
Weight to material in the scale hooper (40) is carried out real-time weighing;
The real-time weight that institute's weighing is obtained material is compared with estimating the weighing value;
When comparative result is that real-time weight reaches when estimating the weighing value, stop screw machine (20) and close butterfly valve (30) simultaneously.
12. method according to claim 11, wherein said expectation weighing value deducts the drop value for the proportioning value.
13. method according to claim 11 is that the real-time weight of material moves closer to the rotating speed that reduces screw machine (20) in the process of estimating the weighing value at comparative result wherein.
14. method according to claim 11, this method also comprises:
Stopping screw machine (20) and closing butterfly valve (30) simultaneously afterwards, once more the real-time weight of material in the scale hooper (40) is carried out weighing;
Calculate the proportioning value of material and the difference X between the weight in real time and this difference X compared with a permissible error value A so that judge whether need the benefit scale:
As this difference X during greater than said permissible error value A, judgement needs to mend scale, and opened butterfly valve (30) is mended scale, and after after a while, closes butterfly valve (30);
When this difference X is less than or equal to permissible error value A, judge and need not mend scale that weighing finishes.
15. method according to claim 11, this method also comprises:
Stopping screw machine (20) and closing butterfly valve (30) simultaneously afterwards, once more the real-time weight of material in the scale hooper (40) is carried out weighing;
Calculate the proportioning value of material and the difference X between the weight in real time and this difference X compared with a permissible error value A and a critical value B greater than said permissible error value A compares so that judge whether need the benefit scale:
As this difference X during greater than said critical value B; Judgement needs a large amount of scales of mending; Then start screw machine (20) and simultaneously opened butterfly valve (30) mend scale, and when said difference X is less than or equal to said permissible error value A, stops screw machine (20) simultaneously and close butterfly valve (30);
When this difference X is less than or equal to said critical value B and during greater than said permissible error value A, judgement needs a small amount of scale of mending, then only opened butterfly valve (30) is mended scale, and after after a while, closes butterfly valve (30);
When this difference X is less than or equal to said permissible error value A, judge and need not mend scale that weighing finishes.
16. according to claim 14 or 15 described methods, wherein said a period of time is directly proportional with mending the scale value, mending the scale value is the difference between said difference X and the permissible error value A.
CN201110396955XA 2011-12-02 2011-12-02 System and method for material weighing and weighing controller CN102494746A (en)

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CN108593074A (en) * 2018-04-21 2018-09-28 王佳宁 A kind of intelligent feeding robot and its grasping means based on Internet of Things
CN108955846A (en) * 2018-08-14 2018-12-07 安徽中联九通机械设备有限公司 A kind of ingredient machine control system
CN109959436A (en) * 2017-12-14 2019-07-02 湖南中联重科混凝土机械站类设备有限公司 Control method, device and the material weighing system of material weighing
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CN104150198A (en) * 2014-08-08 2014-11-19 宝钢磁业(江苏)有限公司 System for automatically and remotely resetting weighing instrument
CN105444858A (en) * 2014-08-18 2016-03-30 中联重科股份有限公司 Trace material metering control equipment, metering system, engineering machinery and method
CN105444858B (en) * 2014-08-18 2018-01-02 中联重科股份有限公司 A kind of trace material measure control equipment, metering system, engineering machinery and method
CN104568087A (en) * 2015-01-06 2015-04-29 莱芜钢铁集团电子有限公司 Material control system
CN104568087B (en) * 2015-01-06 2017-05-10 莱芜钢铁集团电子有限公司 Material control system
CN108267203A (en) * 2017-01-04 2018-07-10 湖南中联重科混凝土机械站类设备有限公司 Light material measuring equipment and its control method and device
CN108267203B (en) * 2017-01-04 2020-03-03 湖南中联重科混凝土机械站类设备有限公司 Light material metering equipment and control method and device thereof
CN107560701B (en) * 2017-08-22 2019-07-19 中联重科股份有限公司 A kind of batching metering method and equipment
CN107560701A (en) * 2017-08-22 2018-01-09 中联重科股份有限公司 A kind of batching metering method and equipment
CN109959436A (en) * 2017-12-14 2019-07-02 湖南中联重科混凝土机械站类设备有限公司 Control method, device and the material weighing system of material weighing
CN108593074A (en) * 2018-04-21 2018-09-28 王佳宁 A kind of intelligent feeding robot and its grasping means based on Internet of Things
CN108955846A (en) * 2018-08-14 2018-12-07 安徽中联九通机械设备有限公司 A kind of ingredient machine control system
CN110764476A (en) * 2019-10-23 2020-02-07 张占军 Control method and device

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