CN102494753B - Method for calibrating electronic belt scale - Google Patents
Method for calibrating electronic belt scale Download PDFInfo
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- CN102494753B CN102494753B CN 201110382754 CN201110382754A CN102494753B CN 102494753 B CN102494753 B CN 102494753B CN 201110382754 CN201110382754 CN 201110382754 CN 201110382754 A CN201110382754 A CN 201110382754A CN 102494753 B CN102494753 B CN 102494753B
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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
Purpose of the present 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: described belted electronic balance is cleaned out; S2: with the scale body level-off of described belted electronic balance, and the belt of adjusting described belted electronic balance occurs to guarantee described belt no sideslip in operation process; S3: regulate described belted electronic balance two pressure transducers so that the non-load voltage signal of described two pressure transducers in first predetermined interval, described two pressure transducers load voltage signal is arranged in second predetermined interval, the voltage signal that do not stress of described two pressure transducers is a null value, and the voltage signal difference of described 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 described tare weight value less than the described 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 determine scale body error amount according to described weighing value and described actual weight; S6: repeating said steps S5 obtains a plurality of scale body error amounts, and determines scale body average error value according to described a plurality of scale body error amounts; And S7: according to described scale body average error value and original weighing correction factor, determine new weighing correction factor, and described belted electronic balance is calibrated according to described new weighing correction factor.
In one embodiment of the invention, described first predetermined interval is 2～5mV, and described second predetermined interval is 0～20mV, and described the 3rd predetermined interval is 0～0.05mV, and described the 4th predetermined interval is 0～5Kg.
In one embodiment of the invention, described step S5 further comprises: the first weighing value of obtaining the counterweight of standard weights by the static scale of blending bunker; Obtain the second weighing value of material by described belted electronic balance, and obtain the 3rd weighing value of described material by the static scale of described blending bunker; According to first weighing value of the standard weights of described counterweight, described counterweight and the 3rd weighing value of described material, obtain the actual weight of described material by 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 described material and the second weighing value of described material, determine described scale body error amount by 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, described step S7 further comprises: according to described scale body average error value and described original weighing correction factor, obtain described new weighing correction factor by 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, described method also comprises: remeasure the material of described known actual weight by the belted electronic balance after the calibration, obtain the 4th weighing value of described material; Determine the weighing error of the belted electronic balance after the described calibration according to the 4th weighing value of described material and described actual weight; Judge that described weighing error is whether in predetermined weighing error range of control; And if described weighing error exceeds described weighing error range of control, then return described step S5 and recalibrate, until described weighing error in described weighing error range of control.
In one embodiment of the invention, described 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 height of the belted electronic balance after the calibration, 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 by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and 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 described 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.Below by the embodiment that is described with reference to the drawings is exemplary, only is 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 described tare weight value less than the described 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, approaching more good more 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.
Finish the preceding preliminary work of belted electronic balance calibration by 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 determines scale body error amount according to weighing value and actual weight.
In one embodiment of the invention, can test by following method:
At first, by 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 by 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, determine the actual weight of material.
At last, according to the second weighing value of material and the actual weight of material, determine the scale body error amount of belted electronic balance by 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 determines 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, determines new weighing correction factor, and according to this new weighing correction factor belted electronic balance is calibrated.
Particularly, can calculate new weighing correction factor by 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 determining 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 by 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 determining 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 described 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%.
Describe the calibration steps of the belted electronic balance of the embodiment of the invention below for a specific example in detail.
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 determine quantity of goods produced=blending bunker weighing instrument demonstration amount/1.02 thus.
Secondly, to step S104, finish belted electronic balance calibration preliminary work before according to above-mentioned steps S101.
Once more, the unlocking electronic belt conveyer scale claims 1 ton A ore to be transported to blending bunker from belted electronic balance, 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.
Once more, the scale body error amount that 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, by 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 height of the belted electronic balance after the simple to operate and calibration can be applicable to occasions such as oarse-grained material weighing.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by 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: described belted electronic balance is cleaned out;
S2: with the scale body level-off of described belted electronic balance, and the belt of adjusting described belted electronic balance occurs to guarantee described belt no sideslip in operation process;
S3: regulate described belted electronic balance two pressure transducers so that the non-load voltage signal of described two pressure transducers in first predetermined interval, described two pressure transducers load voltage signal is arranged in second predetermined interval, the voltage signal that do not stress of described two pressure transducers is a null value, and the voltage signal difference of described 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 described tare weight value less than the described pulse value of weighing;
S5: under the situation that described belted electronic balance works well, obtain the weighing value of material, and determine scale body error amount according to the weighing value of described material and the actual weight of material;
S6: repeating said steps S5 obtains a plurality of scale body error amounts, and determines scale body average error value according to described a plurality of scale body error amounts; And
S7: according to described scale body average error value and original weighing correction factor, determine new weighing correction factor, and described belted electronic balance is calibrated according to described new weighing correction factor.
2. the calibration steps of belted electronic balance according to claim 1 is characterized in that, described first predetermined interval is 2～5mV, and described second predetermined interval is 0～20mV, and described the 3rd predetermined interval is 0～0.05mV, and described the 4th predetermined interval is 0～5Kg.
3. the calibration steps of belted electronic balance according to claim 1 is characterized in that, described step S5 further comprises:
Obtain the first weighing value of the counterweight of standard weights by the static scale of blending bunker;
Obtain the second weighing value of described material by described belted electronic balance, and obtain the 3rd weighing value of described material by the static scale of described blending bunker;
According to first weighing value of the standard weights of described counterweight, described counterweight and the 3rd weighing value of described material, obtain the actual weight of described material by 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 described material and the second weighing value of described material, determine described scale body error amount by 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 described step S7:
According to described scale body average error value and described original weighing correction factor, obtain described new weighing correction factor by 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 described known actual weight by the belted electronic balance after the calibration, obtain the 4th weighing value of described material;
Determine the weighing error of the belted electronic balance after the described calibration according to the 4th weighing value of described material and described actual weight;
Judge that described weighing error is whether in predetermined weighing error range of control; And
If described weighing error exceeds described weighing error range of control, then return described step S5 and recalibrate, until described weighing error in described weighing error range of control.
6. the calibration steps of belted electronic balance according to claim 5 is characterized in that, described weighing error range of control is-2%～2%.
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| CN 201110382754 CN102494753B (en) | 2011-11-25 | 2011-11-25 | Method for calibrating electronic belt scale |
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| CN 201110382754 CN102494753B (en) | 2011-11-25 | 2011-11-25 | Method for calibrating electronic belt scale |
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