CN1263291A - Continuous quantitative feeding control method and its equipment - Google Patents
Continuous quantitative feeding control method and its equipment Download PDFInfo
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- CN1263291A CN1263291A CN 99112090 CN99112090A CN1263291A CN 1263291 A CN1263291 A CN 1263291A CN 99112090 CN99112090 CN 99112090 CN 99112090 A CN99112090 A CN 99112090A CN 1263291 A CN1263291 A CN 1263291A
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Abstract
The continuous quantitative feeding control method is characterized by that according to the required feeding rate, respectively setting instantaneous weight of material in metering channel and moving speed of said material utilizing weighing sensor to detect instantaneous weight value and feed back into feeding regulating device, according to the set moving speed, delivering correspondent vibration control parameter to drive metering channel and make it vibrate to feed material. Said invented equipment is formed from feeding device, vibrator, metering channel, weighing sensor, machine base and control instrument, two ends of weighing sensor are respectively connected with metering channel and machine base, and the control instrument can be used for controlling vibrator and feeding device respectively.
Description
The invention belongs to consecutive weighings and feed control technology field, it relates to a kind of control method and equipment of dosing.
When the technological process feed metering of solid bulk material, adopt belted electronic balance and bunker scale mostly at present.Belted electronic balance incompatibility high-temperature material, and complex structure, maintenance cost height, can not seal, bunker scale can not be realized continuous-feeding.The weightless scale of Germany Carl Schenck AG adopts the quasistatic mode of weighing, and have higher measuring accuracy, but volume is excessive, limited by usage space.The Weighing method of existing a kind of vibrating feed and equipment (patent No. ZL93109467.4), need with load sensor sense weight signal, use acceleration transducer detected amplitude signal, and calculate the translational speed of material, and then draw the flow that is transferred material by amplitude data.Because measuring tank and feeder trough synchronous vibration, during FEEDBACK CONTROL, regulate very difficulty of re-set target value that an execution parameter changes two variablees simultaneously, as attempt to change when weighing the translational speed of material in the groove, the instantaneous weight of material also changes thereupon, and the variation of instantaneous weight can influence translational speed, therefore measuring accuracy is not high, particularly (attempting constant storehouse presses when feed bin pressure changes, be unusual difficulty in industrial environment) time, influenced the vibration characteristics of system, destroyed the corresponding relation of acceleration signal and material translational speed, make acceleration transducer can not accurately detect translational speed, produce than mistake.
The object of the present invention is to provide a kind of control method and equipment of continuous dosing of very during with the mode of vibration convey materials, make signal Processing and control at unitary variant, and instantaneous weight and the independent respectively control of translational speed, do not disturb mutually, debugging is convenient, and measuring accuracy is higher.
Purpose of the present invention is realized by following technical proposals:
When continuous-feeding, its delivery rate (providing the weight of material in the unit interval) is the product of instantaneous weight and translational speed.Method provided by the present invention is: required delivery rate during according to continuous-feeding, set the instantaneous weight and the translational speed of material in the measuring tank respectively, instantaneous weight value by material in the sensor measuring tank, and be worth feedback regulation drawing-in device 4 thus, the instantaneous weight of material in the measuring tank is stabilized on the setting value, export corresponding vibration control driving parameter vibrator and drive the measuring tank vibration according to setting translational speed, make the interior material of measuring tank move and be sent along throughput direction by setting translational speed, the feeding coal of unit interval is added up, obtain accumulative total feed weight.
Because material is supplied with by drawing-in device in the measuring tank, its instantaneous weight is controlled by drawing-in device; The translational speed of material is by vibrator control in the measuring tank, and measuring tank does not contact mutually, works alone with drawing-in device, thereby can regulate respectively.
Instantaneous weight can be detected by LOAD CELLS in the measuring tank, and the accurate detection of translational speed is comparatively difficult, because for the vibrating feed mode, because of cell body is done small to-and-fro movement, material moves along the relative cell body of throughput direction, and also has certain relative motion between the bed of material internal particle.When adopting vibration measuring width of cloth method to detect as translational speed, because of the characteristics of motion of vibrational system comparatively complicated, when weight in the vibrating mass (comprising material) when changing, the natural frequency of vibrational system, equivalent damping, amplitude versus frequency characte etc. change thereupon, even the controlled variable of vibrator is constant, amplitude also can change thereupon, the corresponding relation of amplitude and translational speed is not accurate enough, uses other method, as allows material web motion detection device motion or use the photoelectric tracking mode, complex structure, and effect is also undesirable.Method provided by the present invention, way by weight of material in the stabilimeter measuring tank, make vibration characteristics stable, drive controlling parameter of vibrator (as electric current, voltage, frequency or duty cycle square wave etc.) and material translational speed have good corresponding relation like this, and method can be measured this corresponding relation curve easily by experiment.For the equipment of same model, this corresponding relation is constant (when bigger variation took place the material self character, timing signal was revised at the scene).Above-mentioned experimental technique is as follows: set an instantaneous gravimetric value, regulating drawing-in device is stabilized on this value the interior weight of material of measuring tank, different vibrator drive controlling parameters is set at regular intervals, feed weight in each parameter point certain hour of actual respectively weighing also calculates translational speed, can obtain the corresponding relation data of vibrator controlled variable and translational speed, this data processing is become smooth curve or find out approximate function to deposit control instrument in, can realize step-less adjustment.Usually, instantaneous weight can be fixed on the numerical value, regulates feeding coal by changing translational speed, and several instantaneous weight values also can be set, and makes equipment be in optimum Working.The fixing drive controlling parameter of vibrator is provided with the way of instantaneous weight, the purpose that also can realize regulating delivery rate by change.
Specialized equipment of the present invention is by drawing-in device 4, vibrator 3, measuring tank 1, LOAD CELLS 2, control instrument 5 and support 7 are formed, the charging aperture of measuring tank 1 connects the discharging opening of drawing-in device 4, vibrator 3 is connected with measuring tank 1, give measuring tank 1 with vibration transfer, material in the measuring tank 1 moves at the effect lower edge of exciting force throughput direction, the test side of LOAD CELLS 2 is connected with measuring tank 1, the other end is connected with support 7, its output signal connects control instrument 5, be used for detecting the instantaneous weight of material in the measuring tank, drawing-in device 4 does not contact with measuring tank 1, the output control terminal of control instrument 5 connects the power part of vibrator 3 and drawing-in device 4 respectively, controls vibrator 3 and drawing-in device 4 respectively.Drawing-in device 4 is connected on the feed bin discharging opening, is used for the inlet feeding to measuring tank 1.Its feeding capacity feeds back to controller adjusting 5 controls by the output signal of LOAD CELLS 2, translational speed directly initiatively provides data by control instrument according to the corresponding curve with translational speed of vibrator drive controlling parameter that pre-deposits, and does not need other sensor installation to detect.
The present invention only gathers weighing-up wave, by weighing-up wave feedback regulation drawing-in device, overcome the influence of factors such as feed bin pressure fully, the corresponding relation data output control of the vibration parameters that the translational speed of material is directly pre-deposited by the control instrument foundation--translational speed, do not need other detection, the independent respectively control of instantaneous weight and translational speed is not disturbed mutually, and debugging convenience, working stability, feed measuring accuracy are higher.
Description of drawings:
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the structural representation of the embodiment of the invention two.
As shown in Figure 1, described specialized equipment is made up of drawing-in device 4, vibrator 3, vibration damper 6, measuring tank 1, LOAD CELLS 2, support 7 and control instrument 5 etc.Measuring tank 1 is rigidly connected with vibrator 3, and is connected with the test side of LOAD CELLS 2 by vibration damper 6, and the other end of LOAD CELLS 2 is fixed on the support 7.Vibrator 3 adopts the electric and magnetic oscillation mode, constitute by leaf spring 3c, electromagnet 3b, armature 3a etc., electromagnet 3b is the power part of vibrator 3, by the ac square wave drives of control instrument 5 output (because ac square wave is the secondary power supply after handling, not disturbed by fluctuating factors such as line voltage, frequency, has very high stability, the stability of driving circuit directly influences the feed precision), the dutycycle that changes ac square wave can change the electric current of electromagnet 3b, and then changes the amplitude of vibrator 3.Drawing-in device 4 can adopt rotary disc feeder, screw feeder etc., and present embodiment adopts electric and magnetic oscillation feeding manner simple in structure, drives (because of forming closed loop adjustment with load cell signal, not needing very high lasting accuracy) by ac square wave or ghyristor circuit.Because what LOAD CELLS 2 detected is the general assembly (TW) that comprises material in vibrator 3, measuring tank 1 and the groove, its output useful signal proportion is less, but because the effect of vibration damper 6, the alternation amplitude of signal is also less, and the zero clearing of LOAD CELLS 2 calibration is very convenient, as long as stop the material in feeding and the emptying measuring tank.
As shown in Figure 2, vibrator 3 is connected with measuring tank 1 by LOAD CELLS 2, vibrator 3 is fixed on the support 7 by vibration damper 6, what LOAD CELLS 2 detected like this is the weight of material in measuring tank 1 and the groove, the useful signal large percentage, but the alternation amplitude of signal is also bigger, to certain influence is arranged in serviceable life of sensor.
Claims (6)
1. the control method of a continuous dosing of very, it is characterized in that: required delivery rate during according to continuous-feeding, set the instantaneous weight and the translational speed of material in the measuring tank respectively, instantaneous weight value by material in the sensor measuring tank, and be worth the feedback regulation drawing-in device thus, the instantaneous weight of material in the measuring tank is stabilized on the setting value, export corresponding vibration control driving parameter vibrator and drive the measuring tank vibration according to setting translational speed, make the interior material of measuring tank move and be sent along throughput direction by setting translational speed, the feeding coal of unit interval is added up, obtain accumulative total feed weight.
2. the specialized equipment of the described continuous dosing of very control method of claim 1, by measuring tank (1), sensor (2), drawing-in device (4), vibrator (3), support (7) and control instrument compositions such as (5), the charging aperture of measuring tank (1) connects the discharging opening of drawing-in device (4), the output signal of sensor (2) connects control instrument (5), it is characterized in that: described sensor (3) is LOAD CELLS, its test side is connected with measuring tank (1), the other end is connected with support (7), vibrator (3) is connected with measuring tank (1), and the output control terminal of control instrument (5) connects the power part of vibrator (3) and drawing-in device (4) respectively.
3. specialized equipment according to claim 2 is characterized in that measuring tank (1) and vibrator (3) are rigidly connected.
4. specialized equipment according to claim 2 is characterized in that: vibrator (3) is connected by sensor (2) with measuring tank (1), and vibrator (3) is connected with support (7) by vibration damper (6).
5. according to claim 2 or 3 described specialized equipments, it is characterized in that: be connected with vibration damper (6) between measuring tank (1) and sensor (2).
6. specialized equipment according to claim 2 is characterized in that: described vibrator (3) is made the vibrator of power part for adopting electromagnet (3b), is driven by the circuit and square-wave of the adjustable dutycycle of control instrument (5) output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112090 CN1111770C (en) | 1999-02-12 | 1999-02-12 | Continuous quantitative feeding control method and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99112090 CN1111770C (en) | 1999-02-12 | 1999-02-12 | Continuous quantitative feeding control method and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1263291A true CN1263291A (en) | 2000-08-16 |
| CN1111770C CN1111770C (en) | 2003-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99112090 Expired - Fee Related CN1111770C (en) | 1999-02-12 | 1999-02-12 | Continuous quantitative feeding control method and its equipment |
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| Country | Link |
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| CN (1) | CN1111770C (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941602A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Automatic feed control method |
| CN101941600A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Material type determination method for automatic feeding system |
| CN106031914A (en) * | 2015-03-12 | 2016-10-19 | 技鼎股份有限公司 | A material feeding real-time monitoring device |
| CN108313661A (en) * | 2018-02-02 | 2018-07-24 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | It is a kind of can online self-tuning moving material carrying method |
| CN110806256A (en) * | 2019-11-22 | 2020-02-18 | 四川中烟工业有限责任公司 | Online real-time calculation and judgment method for electronic belt scale |
| CN112798091A (en) * | 2020-12-30 | 2021-05-14 | 深圳市芭田生态工程股份有限公司 | Method and device for controlling feeding precision of weightless scale and related equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI550258B (en) * | 2015-03-04 | 2016-09-21 | 技鼎股份有限公司 | Material feeding device with real-time monitoring |
-
1999
- 1999-02-12 CN CN 99112090 patent/CN1111770C/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941602A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Automatic feed control method |
| CN101941600A (en) * | 2010-08-09 | 2011-01-12 | 中国神华能源股份有限公司 | Material type determination method for automatic feeding system |
| CN101941602B (en) * | 2010-08-09 | 2012-11-28 | 中国神华能源股份有限公司 | Automatic feed control method |
| CN101941600B (en) * | 2010-08-09 | 2013-01-30 | 中国神华能源股份有限公司 | Material type determination method for automatic feeding system |
| CN106031914A (en) * | 2015-03-12 | 2016-10-19 | 技鼎股份有限公司 | A material feeding real-time monitoring device |
| CN106031914B (en) * | 2015-03-12 | 2018-03-27 | 技鼎股份有限公司 | Immediately monitoring material feeding apparatus |
| CN108313661A (en) * | 2018-02-02 | 2018-07-24 | 中国石油集团川庆钻探工程有限公司钻采工程技术研究院 | It is a kind of can online self-tuning moving material carrying method |
| CN110806256A (en) * | 2019-11-22 | 2020-02-18 | 四川中烟工业有限责任公司 | Online real-time calculation and judgment method for electronic belt scale |
| CN110806256B (en) * | 2019-11-22 | 2021-07-27 | 四川中烟工业有限责任公司 | Online real-time calculation and judgment method for electronic belt scale |
| CN112798091A (en) * | 2020-12-30 | 2021-05-14 | 深圳市芭田生态工程股份有限公司 | Method and device for controlling feeding precision of weightless scale and related equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1111770C (en) | 2003-06-18 |
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