CN104180889A - Linear compensation method for electronic belt scale - Google Patents
Linear compensation method for electronic belt scale Download PDFInfo
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- CN104180889A CN104180889A CN201410354511.3A CN201410354511A CN104180889A CN 104180889 A CN104180889 A CN 104180889A CN 201410354511 A CN201410354511 A CN 201410354511A CN 104180889 A CN104180889 A CN 104180889A
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Abstract
The invention discloses a linear compensation method for an electronic belt scale. Two sets of independent weighing scale frames installed on a belt conveyor are used to measure load-bearing errors of a belt conveyor under a maximum conveyance material flow condition and a no-load condition and through calculation of the difference of the load-bearing errors under the two kinds of conditions, a correction error is obtained; and the correction error is used to carry out linear compensation correction on a measurement-range correction number of the belt scale so that the belt scale is capable of overcoming system linear errors brought by tension change and hardness change of a conveyance belt in a whole weighing range and thus an accurate measurement value is obtained. The method is capable of timely, simply and conveniently realizing linear compensation under a condition that normal use of the belt scale is not affected when a conveyance material flow changes so that weighing precision when the conveyance material flow changes is ensured.
Description
Technical field
The present invention relates to a kind of belted electronic balance linear compensation method, belong to Dynamic Weighting technical field.
Background technology
When the weighing principle of work of belted electronic balance is the continuous convey materials of band conveyor, weigh again through belt.The tension force of belt, the pliability of belt directly affect weighing result, because the soft durometer of the belt tension on each band conveyor, belt self is all different, especially the belt tension during from low discharge convey materials to large flow convey materials or from large flow convey materials to low discharge convey materials, the soft durometer of belt be also in respective change, and weighing precision when these factors can be large on convey materials fluctuations in discharge brings impact.The technology addressing this problem is at present between maximum delivery mass flow and minimum delivery mass flow, 80%, 60%, 40% multiple spot according to maximum delivery mass flow carries out corresponding material calibration, due to carry out at the scene the calibration of multiple spot material not only invest high and also implement loaded down with trivial details, operating cost is high, weighing precision when this just causes convey materials fluctuations in discharge large is poor, is also difficult for finding.
Summary of the invention
The problem existing for above-mentioned prior art, the invention provides a kind of belted electronic balance linear compensation method, linear compensation can realize convey materials fluctuations in discharge in time, simply and easily time, the weighing precision of belted electronic balance while ensureing convey materials fluctuations in discharge.
To achieve these goals, a kind of belted electronic balance linear compensation method of the present invention, its linear compensation method step is as follows:
The first step: in the time that belt conveyer scale material is calibrated, under band conveyor maximum delivery mass flow service condition, utilize the front weighing scale frame and the rear weighing scale frame that are arranged on band conveyor to measure respectively stress value; Weighing instrument is counted E except the range calibration of recording after conveyor belt scale calibration, also records stress value a, the b of front weighing scale frame, rear weighing scale frame, the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error A=(b-a)/b; The reference value that this stressed error is linear compensation.
Second step: normally move while adjusting zero point at belt conveyer scale, under empty belt state, utilize the front weighing scale frame and the rear weighing scale frame that are arranged on band conveyor to measure respectively stress value; Stress value c, the d of the front weighing scale frame of weighing instrument record, rear weighing scale frame, the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error B=(d-c)/d; Another reference value that this stressed error is linear compensation.
The 3rd step: weighing instrument calculates round-off error K, K=A-B, utilize round-off error K to belt conveyer scale range calibration count E and carry out linear compensation correction: F=E × { 1-K × (1-N/M) }
Wherein:
When F--band conveyor convey materials instantaneous delivery is N, corresponding revised belt conveyer scale range calibration number;
When E--band conveyor maximum delivery mass flow, belt conveyer scale range calibration number;
K--round-off error;
N--band conveyor convey materials instantaneous delivery;
M--band conveyor maximum delivery mass flow.
Further, the weighing carrier roller quantity on described front weighing scale frame, rear weighing scale frame can be one or more groups; Can be adjacent between front weighing scale frame and rear weighing scale frame, also can be separated with conveying carrier roller.
Described weighing instrument can be computing machine, can be also programmable controller.
Find through overtesting, at band conveyor, under maximum delivery mass flow and idle condition, the stressed error difference of front weighing scale frame and rear weighing scale frame, has reacted the variation of variation, soft durometer of belt tension to the impact weighing.Utilization of the present invention is arranged on two groups of independence weighing scale framves on band conveyor, measure respectively and calculate the stressed error under band conveyor maximum delivery mass flow condition and idle condition, obtain round-off error by the error amount that calculates two kinds of condition lower stress errors, belt conveyer scale range calibration number is carried out to linear compensation correction with this round-off error, make belt conveyer scale in the situation that of convey materials fluctuations in discharge, can overcome in time the system linear error of bringing due to the variation of belt conveyor tension force and the variation of soft durometer, thereby be measured accurately numerical value.Simultaneously, because the present invention only need detect and calculate and can realize the linear compensation of belted electronic balance in the time that belt conveyer scale material is calibrated and in the time that belt conveyer scale is normally adjusted zero point, therefore the present invention is not affecting under the normal condition using of belted electronic balance, linear compensation can realize convey materials fluctuations in discharge in time, simply, easily time, the weighing precision of belted electronic balance while ensureing convey materials fluctuations in discharge.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention in the time that front and back weighing scale frame is adjacent;
Fig. 2 is the structural representation of the present invention in the time that front and back weighing scale frame is separated by;
In figure: 1, front weighing scale frame, 2, rear weighing scale frame, 3, weighing carrier roller, 4, conveying carrier roller, 5, weighing instrument.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
As depicted in figs. 1 and 2, a kind of belted electronic balance linear compensation method, its linear compensation method step is as follows:
The first step: in the time that belt conveyer scale material is calibrated, under band conveyor maximum delivery mass flow service condition, utilize the front weighing scale frame 1 and the rear weighing scale frame 2 that are arranged on band conveyor to measure respectively stress value; Weighing instrument 5 is counted E except the range calibration of recording after conveyor belt scale calibration, also records stress value a, the b of front weighing scale frame 1, rear weighing scale frame 2, the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error A=(b-a)/b; The reference value that this stressed error is linear compensation.
Second step: normally move while adjusting zero point at belt conveyer scale, under empty belt state, utilize the front weighing scale frame 1 and the rear weighing scale frame 2 that are arranged on band conveyor to measure respectively stress value; Stress value c, the d of the front weighing scale frame 1 of weighing instrument 5 record, rear weighing scale frame 2, the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error B=(d-c)/d; Another reference value that this stressed error is linear compensation.
The 3rd step: weighing instrument 5 calculates round-off error K, K=A-B, utilize round-off error K to belt conveyer scale range calibration count E and carry out linear compensation correction: F=E × { 1-K × (1-N/M) }
Wherein:
When F--band conveyor convey materials instantaneous delivery is N, corresponding revised belt conveyer scale range calibration number, dimensionless group;
When E--band conveyor maximum delivery mass flow, belt conveyer scale range calibration number, dimensionless group;
K--round-off error, dimensionless group;
N--band conveyor convey materials instantaneous delivery, t/h;
M--band conveyor maximum delivery mass flow, t/h.
Weighing carrier roller 3 quantity on front weighing scale frame 1, rear weighing scale frame 2 can be one or more groups;
As shown in Figure 1, adjacent between front weighing scale frame 1 and rear weighing scale frame 2; As shown in Figure 2, between front weighing scale frame 1 and rear weighing scale frame 2, be separated with conveying carrier roller 4.
Weighing instrument 5 can be computing machine, can be also programmable controller.
Case study on implementation:
Test condition: belt width: 1000mm; Belt speed: 2.0m/s; Band conveyor maximum delivery mass flow: M=1000t/h.
The first step: in the time that belt conveyer scale material is calibrated, under band conveyor maximum delivery mass flow service condition, weighing instrument 5 calculates and record:
Belt conveyer scale range calibration number after material calibration: E=8795021;
The stress value of weighing scale frame 1: a=98t before measuring;
The stress value of weighing scale frame 2: b=100t after measuring;
Stressed error: A=(b-a)/b=(100-98)/100=0.02;
Measuring accuracy after the calibration of belt conveyer scale material is: ± 0.5%.
Second step: normally move while adjusting zero point at belt conveyer scale, under empty belt state, weighing instrument 5 calculates and record:
The stress value of weighing scale frame 1: c=1.3t before measuring;
The stress value of weighing scale frame 2: d=1.5t after measuring;
Stressed error: B=(d-c)/d=(1.5-1.3)/1.5=0.13.
The 3rd step: weighing instrument 5 calculates and linear revise compensation:
Round-off error: K=A-B=0.02-0.13=-0.07;
When band conveyor convey materials instantaneous delivery is N, corresponding revised belt conveyer scale range calibration number:
F＝E×{1-K×(1-N/M)}＝8795021×{1-(-0.07)×(1-N/1000)}
Be not difficult to find out by case study on implementation, utilization of the present invention is arranged on two groups of independence weighing scale framves on band conveyor, measure respectively and calculate the stressed error under band conveyor maximum delivery mass flow condition and idle condition, obtain round-off error by the difference of calculating two kinds of condition lower stress errors; In the time that belt conveyer scale is worked, from the variation of motion tracking band conveyor convey materials instantaneous delivery, and carry out corresponding range calibration number according to situation of change, overcome the system linear error of bringing due to the variation of band conveyor convey materials instantaneous delivery, make belt conveyer scale in the time that band conveyor convey materials instantaneous delivery changes, can keep measuring accuracy ± 0.5% after the calibration of belt conveyer scale material, thereby be measured accurately numerical value.
Claims (3)
1. a belted electronic balance linear compensation method, is characterized in that, linear compensation method step is as follows:
The first step: in the time that belt conveyer scale material is calibrated, under band conveyor maximum delivery mass flow service condition, utilize the front weighing scale frame (1) and the rear weighing scale frame (2) that are arranged on band conveyor to measure respectively stress value; Weighing instrument (5) is counted E except the range calibration of recording after conveyor belt scale calibration, also stress value a, the b of the front weighing scale frame of record (1), rear weighing scale frame (2), the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error A=(b-a)/b; The reference value that this stressed error is linear compensation.
Second step: normally move while adjusting zero point at belt conveyer scale, under empty belt state, utilize the front weighing scale frame (1) and the rear weighing scale frame (2) that are arranged on band conveyor to measure respectively stress value; Stress value c, the d of weighing instrument (5) the front weighing scale frame of record (1), rear weighing scale frame (2), the stressed error of weighing scale frame before and after calculating simultaneously and recording, stressed error B=(d-c)/d; Another reference value that this stressed error is linear compensation.
The 3rd step: weighing instrument (5) calculates round-off error K, K=A-B, utilize round-off error K to belt conveyer scale range calibration count E and carry out linear compensation correction: F=E × { 1-K × (1-N/M) }
Wherein:
When F--band conveyor convey materials instantaneous delivery is N, corresponding revised belt conveyer scale range calibration number;
When E--band conveyor maximum delivery mass flow, belt conveyer scale range calibration number;
K--round-off error;
N--band conveyor convey materials instantaneous delivery;
M--band conveyor maximum delivery mass flow.
2. a kind of belted electronic balance and linear compensation method that can linear compensation according to claim 1, it is characterized in that, weighing carrier roller (3) quantity on described front weighing scale frame (1), rear weighing scale frame (2) can be one or more groups; Can be adjacent between front weighing scale frame (1) and rear weighing scale frame (2), also can be separated with conveying carrier roller (4).
3. a kind of belted electronic balance and linear compensation method that can linear compensation according to claim 1 and 2, is characterized in that, described weighing instrument (5) can be computing machine, can be also programmable controller.
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| CN201410354511.3A CN104180889A (en) | 2014-07-23 | 2014-07-23 | Linear compensation method for electronic belt scale |
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| CN201410354511.3A CN104180889A (en) | 2014-07-23 | 2014-07-23 | Linear compensation method for electronic belt scale |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806463A (en) * | 2016-03-08 | 2016-07-27 | 河南丰博自动化有限公司 | Material test-based constant belt weigher quantification accuracy detecting method and device |
| CN107091677A (en) * | 2017-04-03 | 2017-08-25 | 河南理工大学 | A kind of error compensating method and the belt conveyer scale based on error compensation |
| CN108398171A (en) * | 2016-03-23 | 2018-08-14 | 南京三埃工控有限公司 | Belt conveyer scale error decomposed control |
| CN114383699A (en) * | 2022-01-14 | 2022-04-22 | 赛摩电气有限公司 | Belt scale weighing device and metering method |
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| JPS63151824A (en) * | 1986-12-16 | 1988-06-24 | メトラー トレド アーゲー | Method of linearizing electronic balance |
| CN101294843A (en) * | 2008-06-19 | 2008-10-29 | 北京市春海技术开发有限责任公司 | Method for determining correction factor of belt balance real object simulating detection device |
| CN202614361U (en) * | 2012-05-17 | 2012-12-19 | 赛摩电气股份有限公司 | A material calibrating device of a weighing coal feeder |
| CN103900667A (en) * | 2014-04-04 | 2014-07-02 | 赛摩电气股份有限公司 | Electronic belt scale linear compensation method |
-
2014
- 2014-07-23 CN CN201410354511.3A patent/CN104180889A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63151824A (en) * | 1986-12-16 | 1988-06-24 | メトラー トレド アーゲー | Method of linearizing electronic balance |
| CN101294843A (en) * | 2008-06-19 | 2008-10-29 | 北京市春海技术开发有限责任公司 | Method for determining correction factor of belt balance real object simulating detection device |
| CN202614361U (en) * | 2012-05-17 | 2012-12-19 | 赛摩电气股份有限公司 | A material calibrating device of a weighing coal feeder |
| CN103900667A (en) * | 2014-04-04 | 2014-07-02 | 赛摩电气股份有限公司 | Electronic belt scale linear compensation method |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105806463A (en) * | 2016-03-08 | 2016-07-27 | 河南丰博自动化有限公司 | Material test-based constant belt weigher quantification accuracy detecting method and device |
| CN105806463B (en) * | 2016-03-08 | 2019-03-26 | 河南丰博自动化有限公司 | Quantitative weighing belt quantitative precision detection method and device based on material test |
| CN108398171A (en) * | 2016-03-23 | 2018-08-14 | 南京三埃工控有限公司 | Belt conveyer scale error decomposed control |
| CN108398171B (en) * | 2016-03-23 | 2019-12-17 | 南京赛摩三埃工控设备有限公司 | belt scale error decomposition control method |
| CN107091677A (en) * | 2017-04-03 | 2017-08-25 | 河南理工大学 | A kind of error compensating method and the belt conveyer scale based on error compensation |
| CN114383699A (en) * | 2022-01-14 | 2022-04-22 | 赛摩电气有限公司 | Belt scale weighing device and metering method |
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Application publication date: 20141203 |