CN102538923A - Continuous measuring electronic belt scale - Google Patents
Continuous measuring electronic belt scale Download PDFInfo
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- CN102538923A CN102538923A CN2011104339590A CN201110433959A CN102538923A CN 102538923 A CN102538923 A CN 102538923A CN 2011104339590 A CN2011104339590 A CN 2011104339590A CN 201110433959 A CN201110433959 A CN 201110433959A CN 102538923 A CN102538923 A CN 102538923A
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Abstract
The invention relates to a continuous measuring electronic belt scale which comprises a belt conveyer, a weight measuring sensor, a filling funnel, a feeding device, a feeding speed control unit and a control instrument, wherein the belt conveyer consists of a rack, a speed reducer, a material scraping plate, a driving roller, a conveying belt, a support roller, a belt blocking wheel and a driven roller, the belt conveyer is arranged on the weight measuring sensor wholly, materials to be weighed is fed by the feeding device and are sent to the conveying belt by the filling funnel, the control instrument collects signals input by the weight measuring sensor, the input signals are estimated by a central processing unit and a control program, estimating results are fed back to the feeding speed control unit to change feeding speed of the feeding device so as to realize stable flow of materials on the belt conveyer and meet requirements on continuous measuring and burdening, and the control instrument can be connected with an upper computer, and integrally controls a plurality of continuous measuring electronic belt scales to form a complete burdening system. In the continuous measuring electronic belt scale, a system model is easy, the measuring accuracy is high, the structure is simple and compact so that the scale is convenient to expand, the generality of components and parts is strong so that the scale is convenient to maintain, and the reliability of devices is high so that the scale can be suitable for special environments with a large amount of dust, high humidity and corrosion of weak acid and weak base.
Description
One, technical field
The present invention relates to a kind of continuous measurement belted electronic balance.
Two, background technology
As the representative of continuous measurement belted electronic balance, suspended electronic belt conveyor scale using, lever belted electronic balance and controlled nucleon operated belt conveyor scale at home and abroad every profession and trade are widely used, and have represented the present state of present technique basically.
A kind of method and apparatus is provided in ZL98801869.1; There is a weighing unit to be used for measuring the blanking bar load of backhaul behind the loading hopper of conveying belt; The load that belt behind the material is arranged a weighing unit to be used for measuring before loading hopper to load along running direction of conveyor belt; Also have the device of measuring conveying belt speed V simultaneously, have the function of zero correction and consecutive weighings based on this principle equipment.
This method is the expansion of suspended electronic belt conveyor scale using in essence; Its corresponding apparatus has still been broken away from not the inherent defect of suspended electronic belt conveyor scale using; Because the weight of material is loaded on the LOAD CELLS through belt, load-bearing carrying roller, mechanical connection mechanism indirectly; Weighing result will receive belt speed, and the influence of factors such as belt long-time running tightness, belt deviation, carrying roller friction force, frame stress, environment causes that the variation of transport function causes weighing result inaccurate.Though adopted two weighing units to solve the problem of zero correction in the method; But simultaneously also with system become more complicated; To proofread and correct two weighing units simultaneously in the use at the scene; Equipment is wanted the distance between two weighing units of strict control when installing, and will guarantee that be actually vertical with the belt movement direction of rod member on the weighing unit is difficult to realize.
A kind of method and apparatus is provided in ZL153937.5, equipment disposition have the conveyer of guiding device, make the rectangle of cross sectional shape formation rule of tested material or trapezoidal.Adopt metal-coating to prevent that gamma-ray scattered photon from getting into detector, circumferential surface has the rectangle window to the one side of gamma ray projector, and window size and gamma-rays work radiation areas are complementary.Confirmed the mathematical model of gamma ray projector radiation field under fan-shaped wide beam and parallel wide beam physical model.The physical model of sensor-based system, material distribution and the mathematical model and the uclear scale of uclear scale is complementary to improve the precision of uclear scale.
This method should be to the improvement of original uclear scale and refinement; Quoted build up factor B in the mathematical model and be one with gamma-rays photon energy, material properties, thickness, gamma ray projector collimating aperture shape, the relevant dimensionless group of gamma ray detector characteristic, must confirm through materials calibration before use.Though the cross sectional shape of tested material is the rectangle or trapezoidal the minimizing because the measured deviation that section configuration causes of rule; But the physicochemical property of some material itself are always not the same in actual use; As when moisture in the material changes, granularity increases and air in during the variation of dust; Deviation can take place in the value that build up factor B and original demarcation obtain, and this will produce bigger influence to measuring accuracy.
The drawback of above-mentioned two kinds of continuous measurement belted electronic balances is that weight of material does not record through directly being loaded on the load cell.Be a kind of indirect relation between the actual weight of material and the measured value of sensor, system itself can't avoid the error in dipping that the interference in the transmittance process causes.
Three, summary of the invention
The objective of the invention is defective to above-mentioned continuous measurement belted electronic balance; A kind of new structure and method are proposed; Its core concept is that band conveyor is installed on the load cell; Directly detect the actual weight of material and get rid of the interference that brings in the transmittance process, simplify mathematical model, thereby reach a kind of continuous measurement belted electronic balance of material high precision metering.
The technical scheme that the present invention adopted is: comprise the band conveyor be made up of frame, reductor, material scraping plate, drive roll, conveying belt, carrying roller, flap wheel, driven roll and load cell, loading hopper, feeding device, feeding speed control module, control instrument; The band conveyor integral installation is on load cell; The material of treating weighing provides through feeding device; Deliver to conveying belt via loading hopper; Control instrument is gathered the signal by the load cell input, by CPU and control program the signal of input is assessed, and feeds back to the feeding speed that the feeding speed control module changes feeding device according to assessment result; Thereby the material stable flow rate on the realization band conveyor satisfies the requirement of continuous measurement and batching.
Said band conveyor integral installation is on load cell; Can guarantee the actual weight of the direct reaction load of measured value and be linear relationship; Measuring tare weight g before the band conveyor operation is stored in the addressable RAM of control instrument; Material scraping plate can be removed the salvage stores on the conveying belt during operation, guarantees that the tare weight of conveyor does not change, and the mathematical model of the nt wt net weight G of material and load cell measured value is on the conveying belt:
G＝kx-g
Wherein: G---the nt wt net weight of material
K---constant coefficient (obtaining during calibration sensor)
X---be the measured value of load cell (8)
G---band conveyor tare weight
Conveying belt feeding section length L, the reductor speed ratio, D is known for the drive roll diameter, and belt speed V also is an exact value, and the mathematical model of the flow value Q of belt is:
Q＝GV/L
Wherein: Q---Belt Flow
The nt wt net weight of G---material
V---belt speed
L---feeding section length
The relation of the width S on said loading hopper water conservancy diversion inclined-plane and the width S 1 of feeding device discharging opening is S＞S1; Material is seen the back off from feeding device and is flowed into conveying belt again through guide face earlier; Make material be limited in the error range to the influence of the very little symmetrical value of impact of conveying belt; The feeding device outlet is shaped as and exists height difference H to make the material (6) on the conveying belt evenly to be tiled on the conveying belt between rectangle and the conveying belt, does not contact with feeding device simultaneously.
Said loading hopper has the charging aperture of a rectangle, and material is seen the back off from feeding device and flowed into conveying belt again through guide face earlier, and the discharging opening shape also is that rectangle can evenly be tiled in material on the conveying belt.
Said material scraping plate is used to clear up the long-term stability that salvage stores that the conveying belt backhaul adheres to is used to guarantee zero point; The drive roll diameter D of band conveyor is known accurately; Because the weight of material on the belt very gently can not skidded in operational process by belt basically, requiring the stricter place of conveying belt speed also can drive roll, driven roll encapsulate be handled to increase friction factor between itself and the belt to guarantee the synchronous operation of roller and belt.
Said control instrument has the AD conversion unit of the CPU of being connected to; The measuring-signal of load cell input; After AD conversion unit is handled, be input to CPU and compare assessment with parameter and the controlling value that the keyboard input is stored in CPU, and through the speed of communication unit output controlling value to feeding speed control module change feeding device feeding speed.
Said feeding device can be selected different feed modes according to the character of material; As using spiral, belt, vibra feeder or other known method of feeding, the speed that feeding device receives the control of feeding speed control module in time to adjust feeding speed satisfies the requirement of weighing.
As the continuous measurement belted electronic balance owing to need not to increase feed bin, and to fed distance require that long therefore conveyor overall weight can design very light, the range of load cell all can be chosen in below the 200kg usually, helps improving measuring accuracy.
Also can link to each other as control instrument,, form complete feed proportioning system many integrated controls of continuous measurement belted electronic balance with host computer.
The major advantage of technique scheme is; System's mathematics physics model is simple, measuring accuracy is high, simple and compact for structurely be convenient to expand, component universality is convenient to by force safeguard; Equipment dependability is high, can adapt to the particular surroundings that the big humidity of dust is high and exist weak acid and weak base to corrode.
Four, description of drawings
Below in conjunction with accompanying drawing the present invention is described further:
Accompanying drawing 1 is the synoptic diagram of continuous measurement belted electronic balance of the present invention;
Wherein: 1---------------------------flap is taken turns 10---driven roll 11---loading hopper 12---feeding device 13---feeding speed control module 14---control instrument 15---AD conversion unit 16---display unit 17---keyboard 18---CPU 19---communication units to load cell 9 to carrying roller 8 to material 7 to conveying belt 6 to drive roll 5 to material scraping plate 4 to reductor 3 to frame 2
Five, embodiment
Combine accompanying drawing to come the present invention is done further explain down: to comprise the band conveyor formed by frame 1, reductor 2, material scraping plate 3, drive roll 4, conveying belt 5, carrying roller 7, flap wheel 9, driven roll 10 and load cell 8, loading hopper 11, feeding device 12, feeding speed control module 13, control instrument 14; The band conveyor integral installation is on load cell 8; The material 6 of treating weighing provides through feeding device 12; Deliver to conveying belt 5 via loading hopper 11; The signal that control instrument 14 is gathered by load cell 8 inputs is assessed the signal of input by CPU and control program, feeds back to the feeding speed that feeding speed control module 13 changes feeding device 12 according to assessment result; Thereby material 6 stable flow rate on the realization band conveyor satisfy the requirement of continuous measurement and batching; The band conveyor integral installation is on load cell 8; Can guarantee the actual weight of the direct reaction load of measured value and be linear relationship; Measuring tare weight g before the band conveyor operation is stored in control instrument 14 addressable RAM; Material scraping plate 3 can be removed the salvage stores on the conveying belt during operation, guarantees that the tare weight of conveyor does not change, and the mathematical model of the nt wt net weight G of material 6 and load cell 8 measured values is on the conveying belt:
G＝kx-g
Wherein: G---the nt wt net weight of material
K---constant coefficient (obtaining during calibration sensor)
X---be the measured value of load cell 8
G---band conveyor tare weight
Conveying belt 5 feeding section length L, reductor 2 speed ratios, 4 diameter D are known for drive roll, and belt speed V also is an exact value, and the mathematical model of the flow value Q of belt is:
Q＝GV/L
Wherein: Q---Belt Flow
The nt wt net weight of G---material
V---belt speed
L---feeding section length
The relation of the width S 1 of the width S on loading hopper 11 water conservancy diversion inclined-planes and feeding device 12 discharging openings is S＞S1; Material 6 is seen the back off from feeding device 12 and is flowed into conveying belt 5 again through guide face earlier; Make the influence of the very little symmetrical value of impact of 6 pairs of conveying belt 5 of material be limited in the error range; Feeding device 12 outlets are shaped as and exist height difference H to make the material 6 on the conveying belt 5 can evenly be tiled on the conveying belt 5 between rectangle and the conveying belt 5, do not contact with feeding device 12 simultaneously;
Said loading hopper 11 has the charging aperture of a rectangle, and material 6 is seen the back off from feeding device 12 and flowed into conveying belt 5 again through guide face earlier, and the discharging opening shape also is that rectangle can evenly be tiled in material on the conveying belt 5;
Said feeding device 12 can be selected different feed modes according to the character of material 6; As using spiral, belt, vibra feeder or other known method of feeding, the speed that feeding device 12 receives the control of feeding speed control module 13 in time to adjust feeding speed satisfies the requirement of weighing.
The actual running results shows that when the weigh on the continuous measurement belted electronic balance is 40kg error in dipping less than ± 80g, satisfies the requirement of 0.2 grade of scale.
Claims (7)
1. continuous measurement belted electronic balance; Comprise the band conveyor formed by frame (1), reductor (2), material scraping plate (3), drive roll (4), conveying belt (5), carrying roller (7), flap wheel (9), driven roll (10) and load cell (8), loading hopper (11), feeding device (12), feeding speed control module (13), control instrument (14); It is characterized in that; The band conveyor integral installation is on load cell (8); The material (6) of treating weighing provides through feeding device (12), delivers to conveying belt (5) via loading hopper (11), and control instrument (14) is gathered the signal by load cell (8) input; By CPU and control program the signal of input is assessed; Feed back to the feeding speed that feeding speed control module (13) changes feeding device (12) according to assessment result, thereby realize material (6) stable flow rate on the band conveyor, satisfy the requirement of continuous measurement and batching.
2. according to claim 1; A kind of continuous measurement belted electronic balance is characterized in that: the band conveyor integral installation is on load cell (8); Can guarantee the actual weight of the direct reaction load of measured value and be linear relationship; Measuring tare weight g before the band conveyor operation is stored in the addressable RAM of control instrument (14); Material scraping plate during operation (3) can be removed the salvage stores on the conveying belt, guarantees that the tare weight of conveyor does not change, and the mathematical model of the nt wt net weight G of material on the conveying belt (6) and load cell (8) measured value is:
G＝kx-g
Wherein: G---the nt wt net weight of material
K---constant coefficient (obtaining during calibration sensor)
X---be the measured value of load cell (8)
G---band conveyor tare weight.
3. according to claim 1, a kind of continuous measurement belted electronic balance is characterized in that: conveying belt (5) feeding section length L, and reductor (2) speed ratio, diameter D is known for drive roll (4), and belt speed V also is an exact value, and the mathematical model of the flow value Q of belt is:
Q＝GV/L
Wherein: Q---Belt Flow
The nt wt net weight of G---material
V---belt speed
L---feeding section length.
4. according to claim 1; A kind of continuous measurement electronic belt burden balance is characterized in that: the relation of the width S 1 of the width S on loading hopper (11) water conservancy diversion inclined-plane and feeding device (12) discharging opening is S＞S1; Material (6) is seen the back off from feeding device (12) and is flowed into conveying belt (5) again through guide face earlier; Make material (6) be limited in the error range to the influence of the very little symmetrical value of impact of conveying belt (5); Feeding device (12) outlet is shaped as and exists height difference H to make the material (6) on the conveying belt (5) can evenly be tiled on the conveying belt (5) between rectangle and the conveying belt (5), does not contact with feeding device (12) simultaneously.
5. according to claim 1; A kind of continuous measurement belted electronic balance is characterized in that: control instrument (14) has the AD conversion unit (15) of the CPU of being connected to (18); The measuring-signal of load cell (8) input; After AD conversion unit (15) is handled, be input to CPU (18) and compare assessment, and change the speed of feeding device (12) feeding speed for feeding speed control module (13) through communication unit (19) output controlling value with parameter and the controlling value that keyboard (17) input is stored in CPU (18).
6. according to claim 1; A kind of continuous measurement belted electronic balance is characterized in that: said loading hopper (11) has the charging aperture of a rectangle; Material (6) is seen the back off from feeding device (12) and is flowed into conveying belt (5) again through guide face earlier, and the discharging opening shape also is that rectangle can evenly be tiled in material on the conveying belt (5).
7. according to claim 1; A kind of continuous measurement belted electronic balance is characterized in that: said feeding device (12) can be selected different feed modes according to the character of material (6); As using spiral, belt, vibra feeder or other known method of feeding, the speed that feeding device (12) receives the control of feeding speed control module (13) in time to adjust feeding speed satisfies the requirement of weighing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104339590A CN102538923A (en) | 2011-12-13 | 2011-12-13 | Continuous measuring electronic belt scale |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104339590A CN102538923A (en) | 2011-12-13 | 2011-12-13 | Continuous measuring electronic belt scale |
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| CN102538923A true CN102538923A (en) | 2012-07-04 |
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| CN2011104339590A Pending CN102538923A (en) | 2011-12-13 | 2011-12-13 | Continuous measuring electronic belt scale |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925976A (en) * | 2014-03-26 | 2014-07-16 | 青岛海亿达衡器有限公司 | Automatic weighing device and method |
| CN106168010A (en) * | 2015-05-22 | 2016-11-30 | 卡特彼勒路面机械公司 | Milling machine productivity measures system |
| CN107764381A (en) * | 2017-10-26 | 2018-03-06 | 中山天业智能装备科技有限公司 | One kind metering combination balance |
| CN109425416A (en) * | 2017-08-28 | 2019-03-05 | 山东新北洋信息技术股份有限公司 | A kind of dynamic weigher and its conveyor belt speed method of adjustment and device |
| CN110580017A (en) * | 2019-06-04 | 2019-12-17 | 湖北工业大学 | High-precision prediction method for blast furnace feeding speed |
| CN110779603A (en) * | 2019-10-14 | 2020-02-11 | 中建材创新科技研究院有限公司 | Sheet material single weight on-line detection method and system |
| CN111165865A (en) * | 2020-03-12 | 2020-05-19 | 红云红河烟草(集团)有限责任公司 | Method for improving flow stability of tobacco leaves at inlet of charging machine |
| CN115288114A (en) * | 2022-08-16 | 2022-11-04 | 福建南方路面机械股份有限公司 | Continuous soil improvement system |
| CN116357978A (en) * | 2023-02-23 | 2023-06-30 | 北京琪玥环保科技股份有限公司 | Control method, device and equipment of feeding equipment and storage medium |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103925976B (en) * | 2014-03-26 | 2016-06-22 | 青岛海亿达衡器有限公司 | A kind of automatic weighing device and method |
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| CN109425416A (en) * | 2017-08-28 | 2019-03-05 | 山东新北洋信息技术股份有限公司 | A kind of dynamic weigher and its conveyor belt speed method of adjustment and device |
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| CN110580017A (en) * | 2019-06-04 | 2019-12-17 | 湖北工业大学 | High-precision prediction method for blast furnace feeding speed |
| CN110779603A (en) * | 2019-10-14 | 2020-02-11 | 中建材创新科技研究院有限公司 | Sheet material single weight on-line detection method and system |
| CN111165865A (en) * | 2020-03-12 | 2020-05-19 | 红云红河烟草(集团)有限责任公司 | Method for improving flow stability of tobacco leaves at inlet of charging machine |
| CN115288114A (en) * | 2022-08-16 | 2022-11-04 | 福建南方路面机械股份有限公司 | Continuous soil improvement system |
| CN116357978A (en) * | 2023-02-23 | 2023-06-30 | 北京琪玥环保科技股份有限公司 | Control method, device and equipment of feeding equipment and storage medium |
| CN116357978B (en) * | 2023-02-23 | 2023-12-19 | 北京琪玥环保科技股份有限公司 | Control method, device and equipment of feeding equipment and storage medium |
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Application publication date: 20120704 |