CN102494753A - Method for calibrating electronic belt scale - Google Patents
Method for calibrating electronic belt scale Download PDFInfo
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- CN102494753A CN102494753A CN2011103827544A CN201110382754A CN102494753A CN 102494753 A CN102494753 A CN 102494753A CN 2011103827544 A CN2011103827544 A CN 2011103827544A CN 201110382754 A CN201110382754 A CN 201110382754A CN 102494753 A CN102494753 A CN 102494753A
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Abstract
The invention provides a method for calibrating an electronic belt scale. The method comprises the following steps of: making preparation for calibration, namely cleaning and adjusting the electronic belt scale, adjusting a pressure sensor and calibrating a tare value; on the condition that the electronic belt scale operates normally, obtaining the weighed value of a material of which the actual weight is known, and determining a scale error valve according to the actual weight and the weighed valve of the material; repeating the above measuring step so as to obtain multiple scale error values and determining an average scale error value according to the multiple scale error values; and determining a new weighed value correction factor according to the average scale error valve and an original weighed value correction factor and calibrating the electronic belt scale. The method is simple and has an obvious effect; and the calibrated electronic belt scale has high measurement accuracy and can be used for weighing large granular materials.
Description
Technical field
The present invention relates to metallurgical technology field, particularly a kind of calibration steps of belted electronic balance.
Background technology
The weighing precision of belted electronic balance directly influences the whole technology controlling and process of smelting, the quality of remote effect product and qualification rate.Therefore, the method for calibration of correct belted electronic balance weighing system plays an important role for whole smelting process.
At present, belted electronic balance seldom is used for the weighing of metallurgy industry coarsegrain ore, and this is because the bed of material skewness during ore blanking; The difficult control of ore grain size; And inhomogeneous for raw material supplying, guarantee the precision of weighing, belted electronic balance in parameter control difficulty accomplish.Therefore, need badly a kind of belted electronic balance calibration steps so that belted electronic balance can use widely.
Summary of the invention
The object of the invention is intended to one of solve the problems of the technologies described above at least.
For achieving the above object, the present invention proposes a kind of calibration steps of belted electronic balance, may further comprise the steps: S1: said belted electronic balance is cleaned out; S2: with the scale body level-off of said belted electronic balance, and the belt of adjusting said belted electronic balance occurs to guarantee said belt no sideslip in operation process; S3: regulate said belted electronic balance two pressure transducers so that the non-load voltage signal of said two pressure transducers in first predetermined interval; Said two pressure transducers load voltage signal is arranged in second predetermined interval; The voltage signal that do not stress of said two pressure transducers is a null value, and the voltage signal difference of said two pressure transducers is in the 3rd predetermined interval; S4: under scale body working order, the scale body carried out that the tare weight value is demarcated so that the difference of weigh pulse value and tare weight value in the 4th predetermined interval and said tare weight value less than the said pulse value of weighing; S5: under the situation that belted electronic balance works well, obtain the weighing value of the material of known actual weight, and confirm scale body error amount according to said weighing value and said actual weight; S6: repeating said steps S5 obtains a plurality of scale body error amounts, and confirms scale body average error value according to said a plurality of scale body error amounts; And S7: according to said scale body average error value and original weighing correction factor, confirm new weighing correction factor, and said belted electronic balance is calibrated according to said new weighing correction factor.
In one embodiment of the invention, said first predetermined interval is 2～5mV, and said second predetermined interval is 0～20mV, and said the 3rd predetermined interval is 0～0.05mV, and said the 4th predetermined interval is 0～5Kg.
In one embodiment of the invention, said step S5 further comprises: the first weighing value of obtaining the counterweight of standard weights through the static scale of blending bunker; Obtain the second weighing value of material through said belted electronic balance, and obtain the 3rd weighing value of said material through the static scale of said blending bunker; According to first weighing value of the standard weights of said counterweight, said counterweight and the 3rd weighing value of said material, obtain the actual weight of said material through formula " the first weighing value of the standard weights/counterweight of the 3rd weighing value * counterweight of the actual weight=material of material "; According to the actual weight of said material and the second weighing value of said material, confirm said scale body error amount through formula " actual weight * 100% of scale body error amount=(the second weighing value of the actual weight-material of material)/material ".
In one embodiment of the invention, said step S7 further comprises: according to said scale body average error value and said original weighing correction factor, obtain said new weighing correction factor through following formula,
New weighing correction factor=original weighing correction factor+original weighing correction factor * scale body average error value.
In one embodiment of the invention, said method also comprises: remeasure the material of said known actual weight through the belted electronic balance after the calibration, obtain the 4th weighing value of said material; Confirm the weighing error of the belted electronic balance after the said calibration according to the 4th weighing value of said material and said actual weight; Judge that said weighing error is whether in predetermined weighing error range of control; And if said weighing error exceeds said weighing error range of control, then return said step S5 and recalibrate, until said weighing error in said weighing error range of control.
In one embodiment of the invention, said weighing error range of control is-2%～2%.
According to the calibration steps of the belted electronic balance of the embodiment of the invention, simple to operate, and the precision of the belted electronic balance after the calibration is high, can be applicable to occasions such as oarse-grained material weighing.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize through practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously with easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the process flow diagram of calibration steps of the belted electronic balance of the embodiment of the invention.
Embodiment
Describe embodiments of the invention below in detail, the example of said embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Be exemplary through the embodiment that is described with reference to the drawings below, only be used to explain the present invention, and can not be interpreted as limitation of the present invention.
Fig. 1 is the synoptic diagram of calibration steps of the belted electronic balance of the embodiment of the invention.As shown in Figure 1, this method may further comprise the steps:
Step S101 cleans out belted electronic balance.
Belted electronic balance is cleaned out, guaranteed no-sundries or raw material on the scale body, promptly non-loaded.
Step S102, with the scale body level-off of belted electronic balance, and the belt of adjustment belted electronic balance occurs to guarantee belt no sideslip in operation process.
Step S103; Regulate belted electronic balance two pressure transducers so that the non-load voltage signal of two pressure transducers in first predetermined interval; Two pressure transducers load voltage signal voltage signal that do not stress of two pressure transducers in second predetermined interval is arranged is null value, and the voltage signal difference of two pressure transducers is in the 3rd predetermined interval.
In one embodiment of the invention, first predetermined interval can be 2mV～5mV, and second predetermined interval can be 0～20mV, and the 3rd predetermined interval can be 0～0.05mV.
For example; The setting nut of two pressure transducers about adjusting; The voltage signal of two pressure transducers under non-loaded situation is respectively 2.5mv and 2.53mV about making; And about the voltage signal of two pressure transducers under loaded situation be respectively 18.2mV and 18.22mV, and about the voltage signal of two pressure transducers under situation about not stressing be 0mV.
The pressure signal that it should be understood that two pressure transducers should be transferred to approaching, approaching more good more as much as possible.
Step S104, under scale body working order, the scale body carried out that the tare weight value is demarcated so that the difference of weigh pulse value and tare weight value in the 4th predetermined interval and said tare weight value less than the said pulse value of weighing.
In one embodiment of the invention, the 4th predetermined interval can be 0～5Kg.
It should be understood that weigh pulse value and tare weight value should be transferred to approachingly as much as possible,, but guarantee the tare weight value, otherwise scale body weighing data quantity of goods produced can occur in negative or the weighing process less than situation about weighing less than the pulse value of weighing more near good more.
Accomplish the preceding preliminary work of belted electronic balance calibration through above-mentioned steps S101-S104.
Step S105 under the situation that belted electronic balance works well, obtains the weighing value of the material of known actual weight, and confirms scale body error amount according to weighing value and actual weight.
In one embodiment of the invention, can test through following method:
At first, through the static scale of calibration of weight blending bunker, obtain the weighting error value of the static scale of blending bunker.Particularly, the counterweight of standard weights is put in the blending bunker, reads the first weighing value of counterweight from the blending bunker weighing instrument.According to the standard weights of counterweight and the first weighing value of counterweight, obtain the weighting error value of the static scale of blending bunker through following formula:
Standard weights * 100% of weighting error value=(standard weights of counterweight-weighing value)/counterweight,
Thereby can obtain:
The first weighing value of the standard weights/counterweight of the actual weight of material=blending bunker weighing instrument demonstration amount * counterweight.
Secondly, under the situation that belted electronic balance works well, take by weighing the second weighing value of the material of constant weight with belted electronic balance, and material is transported to blending bunker, read the 3rd weighing value of the static scale of blending bunker.
Once more, according to the computing formula of the 3rd weighing value of the static scale of blending bunker and above-mentioned material actual weight, confirm the actual weight of material.
At last, according to the second weighing value of material and the actual weight of material, confirm the scale body error amount of belted electronic balance through following formula:
Actual weight * 100% of scale body error amount=(the second weighing value of the actual weight-material of material)/material.
Step S106, repeating step S105 obtains a plurality of scale body error amounts, and confirms scale body average error value according to a plurality of scale body error amounts.
Operation according to step S105 is repeatedly tested, and obtains mean value as scale body average error value according to test and calculate the scale body error amount that comes at every turn.
Need to prove,, then read empirical value, for example get the less several error amounts of fluctuation and calculate an average error value as scale body average error value as scale body average error value if the fluctuation of test errors value is bigger several times.
Step S107 according to scale body average error value and the original weighing correction factor that step S106 calculates, confirms new weighing correction factor, and according to this new weighing correction factor belted electronic balance is calibrated.
Particularly, can calculate new weighing correction factor through following formula:
New weighing correction factor=original weighing correction factor+original weighing correction factor * scale body average error value.
Should be understood that after belted electronic balance is calibrated whether the belted electronic balance after also can confirming to calibrate satisfies accuracy requirement.Particularly, also can carry out following steps:
Step S108 remeasures the material of the known weight of using among the above-mentioned steps S105 through the belted electronic balance after the calibration, obtains the 4th weighing value of material.
Step S109, according to the 4th weighing value of material and the actual weight of material, the weighing error of the belted electronic balance after confirming to calibrate.
Step S110, whether the weighing error of judging the belted electronic balance after the calibration is in predetermined weighing error range of control.
If the weighing error of belted electronic balance after the calibration exceeds said weighing error range of control, then return step S105 and calibrate again, until weighing error in the weighing error range of control.If the weighing error of the belted electronic balance after the calibration then can finish the calibration to belted electronic balance in the weighing error range of control.
In one embodiment of the invention, above-mentioned weighing error range of control can be-2%～2%.
Take the calibration steps that a concrete example specifies the belted electronic balance of the embodiment of the invention below.
At first, 1 ton counterweight is put into blending bunker, reading the weighing value from the blending bunker weighing instrument is 1.02 tons, can confirm quantity of goods produced=blending bunker weighing instrument demonstration amount/1.02 thus.
Secondly, to step S104, accomplish belted electronic balance calibration preliminary work before according to above-mentioned steps S101.
Once more, the unlocking electronic belt conveyer scale claims that from belted electronic balance 1 ton A ore is transported to blending bunker, read blending bunker and claim that value is 0.98 ton, thereby the actual weight that can obtain the A ore is the 0.98/1.02=0.96 ton.
The scale body error amount that once more, can calculate belted electronic balance according to the weighing value of the actual weight of A ore and belted electronic balance is (0.96-1)/0.96 * 100%=-4.16%.
Once more, the former correction factor that obtains the belted electronic balance of A ore is 300, and calculating the correction factor that makes new advances according to the former correction factor of belted electronic balance and scale body error amount is 300+300 * (4.16) %=287.5.
New correction factor 287.5 is re-set as the correction factor of the belted electronic balance of A ore.
Once more, utilize the revised belted electronic balance weight of weighing A ore again, and the weighing error that the actual weight of gravimetric value that obtains according to weighing again and A ore calculates the belted electronic balance of A ore is-0.56%.
At last; Through comparing with the weighing error range of control, the weighing error of the belted electronic balance after finding to calibrate is in-2%～2% weighing error range of control, and the belted electronic balance of A ore satisfies scale body weighing error control requirement; This belted electronic balance verification finishes, and error is-0.56%.
According to the calibration steps of the belted electronic balance of the embodiment of the invention, the measuring accuracy of the belted electronic balance after the simple to operate and calibration is high, can be applicable to occasions such as oarse-grained material weighing.
Although illustrated and described embodiments of the invention; For those of ordinary skill in the art; Be appreciated that under the situation that does not break away from principle of the present invention and spirit and can carry out multiple variation, modification, replacement and modification that scope of the present invention is accompanying claims and be equal to and limit to these embodiment.
Claims (6)
1. the calibration steps of a belted electronic balance is characterized in that, may further comprise the steps:
S1: said belted electronic balance is cleaned out;
S2: with the scale body level-off of said belted electronic balance, and the belt of adjusting said belted electronic balance occurs to guarantee said belt no sideslip in operation process;
S3: regulate said belted electronic balance two pressure transducers so that the non-load voltage signal of said two pressure transducers in first predetermined interval; Said two pressure transducers load voltage signal is arranged in second predetermined interval; The voltage signal that do not stress of said two pressure transducers is a null value, and the voltage signal difference of said two pressure transducers is in the 3rd predetermined interval;
S4: under scale body working order, the scale body carried out that the tare weight value is demarcated so that the difference of weigh pulse value and tare weight value in the 4th predetermined interval and said tare weight value less than the said pulse value of weighing;
S5: under the situation that said belted electronic balance works well, obtain the weighing value of the material of known actual weight, and confirm scale body error amount according to said weighing value and said actual weight;
S6: repeating said steps S5 obtains a plurality of scale body error amounts, and confirms scale body average error value according to said a plurality of scale body error amounts; And
S7: according to said scale body average error value and original weighing correction factor, confirm new weighing correction factor, and said belted electronic balance is calibrated according to said new weighing correction factor.
2. the calibration steps of belted electronic balance according to claim 1 is characterized in that, said first predetermined interval is 2～5mV, and said second predetermined interval is 0～20mV, and said the 3rd predetermined interval is 0～0.05mV, and said the 4th predetermined interval is 0～5Kg.
3. the calibration steps of belted electronic balance according to claim 1 is characterized in that, said step S5 further comprises:
Obtain the first weighing value of the counterweight of standard weights through the static scale of blending bunker;
Obtain the second weighing value of said material through said belted electronic balance, and obtain the 3rd weighing value of said material through the static scale of said blending bunker;
According to first weighing value of the standard weights of said counterweight, said counterweight and the 3rd weighing value of said material, obtain the actual weight of said material through following formula,
The first weighing value of the standard weights/counterweight of the 3rd weighing value * counterweight of the actual weight=material of material; And
According to the actual weight of said material and the second weighing value of said material, confirm said scale body error amount through following formula,
Actual weight * 100% of scale body error amount=(the second weighing value of the actual weight-material of material)/material.
4. the calibration steps of belted electronic balance according to claim 1 is characterized in that, further comprises at said step S7:
According to said scale body average error value and said original weighing correction factor, obtain said new weighing correction factor through following formula,
New weighing correction factor=original weighing correction factor+original weighing correction factor * scale body average error value.
5. the calibration steps of belted electronic balance according to claim 1 is characterized in that, also comprises:
Remeasure the material of said known actual weight through the belted electronic balance after the calibration, obtain the 4th weighing value of said material;
Confirm the weighing error of the belted electronic balance after the said calibration according to the 4th weighing value of said material and said actual weight;
Judge that said weighing error is whether in predetermined weighing error range of control; And
If said weighing error exceeds said weighing error range of control, then return said step S5 and recalibrate, until said weighing error in said weighing error range of control.
6. the calibration steps of belted electronic balance according to claim 5 is characterized in that, said weighing error range of control is-2%～2%.
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| CN102818620A (en) * | 2012-09-14 | 2012-12-12 | 莱芜钢铁集团有限公司 | Checking method of subsidiary electronic belt scale |
| CN103335702A (en) * | 2013-06-25 | 2013-10-02 | 攀钢集团攀枝花钢钒有限公司 | Fast calibrating method applicable to disc feeder |
| CN104006873A (en) * | 2013-02-27 | 2014-08-27 | 梅特勒-托利多(常州)测量技术有限公司 | Belt scale counterweight-free calibration method |
| CN104316157A (en) * | 2014-11-07 | 2015-01-28 | 马钢(集团)控股有限公司 | Method for automatically monitoring indication error changes of belt weighers in blending ore accumulation system |
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| CN112082635A (en) * | 2020-10-10 | 2020-12-15 | 江西中烟工业有限责任公司 | State monitoring and fault judging method for electronic belt scale |
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| CN114680560B (en) * | 2020-12-11 | 2023-07-14 | 珠海优特智厨科技有限公司 | Discharging calibration method, storage medium and batching equipment |
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