CN101943598A - Calibration-free interchange method for belt scale instruments - Google Patents
Calibration-free interchange method for belt scale instruments Download PDFInfo
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- CN101943598A CN101943598A CN 201010221047 CN201010221047A CN101943598A CN 101943598 A CN101943598 A CN 101943598A CN 201010221047 CN201010221047 CN 201010221047 CN 201010221047 A CN201010221047 A CN 201010221047A CN 101943598 A CN101943598 A CN 101943598A
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Abstract
The invention discloses a calibration-free interchange method for belt scale instruments, which can realize complete interchange of the belt scale instruments without calibration. The method mainly comprises the following steps of: comparing two loading points of the same standard weighing signal simulator before each belt scale instrument is delivered; measuring a coefficient k by the principle that two points determine a straight line, wherein the coefficient k is a total transformation coefficient of a weighing sensor signal by a bridge circuit and a gain circuit of the instrument; calculating a correction coefficient b according to a set standard transformation coefficient k'; and writing the correction coefficient b into a corresponding instrument. Therefore, the influence on the difference between the gains of the arch bridge and a preamplifier is eliminated and delivered instruments have completely the same characteristics.
Description
Technical field
The present invention relates to the measure control field, relate in particular to the method that a kind of belt conveyer scale instrument non-calibrating exchanges.
Background technology
Belt conveyer scale is industrial weigher commonly used and burden balance.And in the use of belt conveyer scale, because site environment is abominable, perhaps artificially damage, it is always unavoidable to cause changing the belt conveyer scale instrument.Traditional belt conveyer scale instrument could be used after generally needing to demarcate once more when changing.In industry spot, belt conveyer scale demarcation itself is exactly harder thing, must stop various productions, must expend a large amount of manpower and materials, conflicts toward the rhythm of production of contact with anxiety.Scene at large-scale belt conveyer scale, demarcate the major issue of dragging in many people especially, for example a flow is 200T/h, speed is 1m/s, strap length is the belt conveyer scale of 100m, timing signal, be the basic accuracy that guarantees to demarcate, at least need be on belt with the flow of 160T/h, speed is 1m/s, operation 100m is above to be demarcated, the quality of material is 4.44T on this 100m belt, this must need to adorn 4.44T on belt feeder material often will use forklift in as the demarcation of this situation, truck also needs the higher weighbridge of precision etc., the material of these experiments of marquis sometimes can not be recycled, and causes the waste of material.Just because of that belt conveyer scale is demarcated is loaded down with trivial details, so the user generally is strict with the number of times of demarcation.
In traditional belt conveyer scale instrument design and in producing, generally do not consider the exchange fully of instrument, chief reason is a technical difficulty.Because accomplish the exchange fully of instrument, the design of hardware and software of instrument all had relatively high expectations.Realize the interchangeability of instrument, need satisfied following the requirement: put the consistance of performance before the weighing-up wave, promptly require to want on the software design can eliminate for bridge and the difference that gain brought of before putting.
Summary of the invention
Technical matters to be solved by this invention is to overcome the difficult problem that prior art belt conveyer scale instrument can not non-calibrating be exchanged, but the method that provides a kind of belt conveyer scale instrument non-calibrating to exchange is greatly user-friendly.
The technical solution adopted in the present invention is: the present invention includes following steps:
(1) for every belt conveyer scale instrument y=k * x+c is arranged all, wherein y is the AD value that obtains, and x is the load of LOAD CELLS, and c is a constant, k be instrument for bridge and gain circuitry total conversion coefficient to load cell signal; Set a typical coefficient k '=k * b at all instrument, described typical coefficient k ' is a fixed constant;
(2) determine a standard weighing-up wave simulator, all two POLs on the described standard weighing-up wave simulator are done contrast when every belt conveyer scale instrument is dispatched from the factory, measure total conversion coefficient k of this belt conveyer scale instrument;
(3) calculate the b value according to above-mentioned k '=k * b, described b value is write the total conversion coefficient k that makes in the corresponding belt conveyer scale instrument among the above-mentioned y=k * x+c of k ' value replacement.
Described total conversion coefficient k=a * V * A, wherein V is for supplying bridge voltage, and A is the gain coefficient of gain circuitry, and a is a conversion coefficient.
The temperature of the standard weighing-up wave simulator in described step (2) is floated less than 1ppm.
The temperature of demarcating the chamber in total conversion coefficient k process of measuring the belt conveyer scale instrument is controlled at 20~28 degree.
Beneficial effect of the present invention is: but used the belt conveyer scale instrument of the present invention's non-calibrating exchange method, eliminate for the influence of bridge with the difference of the gain of before putting, every characteristic of every the instrument of dispatching from the factory is identical, can realize the exchange fully of instrument cubicle, solved common belt conveyer scale instrument in the industrial processes and changed and need the loaded down with trivial details and inconvenience of demarcating again behind the table, greatly convenient for users to use; Wherein the temperature of standard weighing-up wave simulator is floated less than the 1ppm and the temperature of demarcating the chamber and is controlled at 20~28 degree, so this standard simulator of weighing can be approximately the ideal signal source, has guaranteed the weigh long-time stability of simulator of standard.
Embodiment
When the belt conveyer scale instrument of the inventive method is adopted in design, be to guarantee that different instrument all has same amplification effect, and possess the exchange fully that this condition just can realize non-calibrating.
Tool present principles of the present invention is as follows:
If y=k * x+c (1)
The AD value that y=obtains,
The load of x=LOAD CELLS,
The c=constant,
K be instrument for bridge and gain circuitry total conversion coefficient to load cell signal.
K can be defined as again
k=a×V×A (2)
V=supplies bridge voltage,
The gain coefficient of A=gain circuitry,
The a=conversion coefficient.
Realize the exchange of instrument, will accomplish total conversion coefficient k unanimity, this just requires k is standardized as a fixing constant.
Total conversion coefficient of bidding standard is k ', the empirical constant of k ' for configuring,
K '=k * b then.
Typical coefficient k ' is a fixing constant, and k is every conversion characteristic that the belt conveyer scale instrument is intrinsic for not making the peaking variation factor before the standardization; B is a correction factor, is the coefficient that k is changed into typical coefficient k ' usefulness.I want standardization, normalized at every belt conveyer scale instrument of company, promptly determine the b parameter.
b=k′/k (3)
The method of its standardization is: when every belt conveyer scale instrument is dispatched from the factory, all will 2 POLs of same standard weighing-up wave simulator be contrasted, by 2 principles of determining a straight line, measure k-factor earlier.According to k ' coefficient, calculate b again, write in the instrument and get final product with corresponding formula (3).This algorithm will guarantee the conversion accuracy more than 1/500000, to reduce unnecessary loss of significance.In addition, the simulator temperature of weighing of this standard in the said method is floated less than 1ppm, and the temperature of demarcating the chamber is controlled at 20~28 degree, so this standard simulator of weighing can be approximately the ideal signal source, has guaranteed the weigh long-time stability of simulator of standard.
The invention will be further described with regard to concrete experimental data below, and relatively 4 belt conveyer scale instrument A1, A2 table and B1, B2 show, and A1 and A2 table are handled through the standardization calibration, and B1 and B2 table do not have standardization.Be to guarantee the experiment comparability, earlier A1 table and B1 table to same belt conveyer scale, do verification with same link code, make them that same weighing accuracy be arranged, it gets respectively its tare weight and calibration coefficient respectively.Again the tare weight of A1, B1 and calibration coefficient are copied to respectively in A2, the B2 instrument, and do the link code experiment of 10kg and 20Kg equally.Table explanation specific as follows:
As seen from the above table, for the A1 that does standardization and A2 table, in the experiment of 20Kg link code, error only is 1/10000, the least error that requires much smaller than the full accuracy of belt conveyer scale GB.Therefore A1 table and A2 table can be accomplished fully and exchange and non-calibrating.
And the B1 and the B2 that do not do standardization show, though the same tare weight value and calibration coefficient are arranged, in the experiment of 20Kg link code, error is 2.65%, and such error is unacceptable in the higher occasion of precision prescribed, so they can not simply exchange.
Claims (3)
1. the method that belt conveyer scale instrument non-calibrating exchanges is characterized in that, may further comprise the steps:
(1) for every belt conveyer scale instrument y=k * x+c is arranged all, wherein y is the AD value that obtains, and x is the load of LOAD CELLS, and c is a constant, k be instrument for bridge and gain circuitry total conversion coefficient to load cell signal; Set a typical coefficient k '=k * b at all instrument, described typical coefficient k ' is a fixed constant;
(2) determine a standard weighing-up wave simulator, all two POLs on the described standard weighing-up wave simulator are done contrast when every belt conveyer scale instrument is dispatched from the factory, measure total conversion coefficient k of this belt conveyer scale instrument;
(3) calculate the b value according to above-mentioned k '=k * b, described b value is write the total conversion coefficient k that makes in the corresponding belt conveyer scale instrument among the above-mentioned y=k * x+c of k ' value replacement.
2. the method that a kind of belt conveyer scale instrument non-calibrating according to claim 1 exchanges is characterized in that, described total conversion coefficient k=a * V * A, and wherein V is for supplying bridge voltage, and A is the gain coefficient of gain circuitry, and a is a conversion coefficient.
3. the method that a kind of belt conveyer scale instrument non-calibrating according to claim 1 and 2 exchanges is characterized in that the temperature of the standard weighing-up wave simulator in described step (2) is floated less than 1ppm.
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CN2010102210472A CN101943598B (en) | 2010-07-08 | 2010-07-08 | Calibration-free interchange method for belt scale instruments |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109900348A (en) * | 2017-12-08 | 2019-06-18 | 奥豪斯仪器(常州)有限公司 | A kind of method that instrument and scale body arbitrarily match combination |
WO2020206853A1 (en) * | 2019-04-11 | 2020-10-15 | 深圳市深信信息技术有限公司 | Electronic scale monitoring method and system |
CN114910152A (en) * | 2022-05-30 | 2022-08-16 | 江西众加利高科技股份有限公司 | Precision correction method for weighing and metering instrument |
Citations (4)
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DE3206061C1 (en) * | 1982-02-19 | 1983-05-05 | Yamato Scale Co. Ltd., Akashi, Hyogo | Device for the automatic, weight-dependent sorting of objects |
CN87202731U (en) * | 1987-02-28 | 1988-05-25 | 南京第二钢铁厂 | Auto corrector for leather belt weigh |
DE29808236U1 (en) * | 1998-05-07 | 1998-07-30 | Riehle Bäckereigerätefabrik GmbH, 73479 Ellwangen | Device for the program-controlled compilation of mixtures of free-flowing bulk goods, in particular food ingredients |
CN101046406A (en) * | 2006-03-28 | 2007-10-03 | 铜陵市三爱思电子有限公司 | On-line belt balance checking process and portable checking device |
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2010
- 2010-07-08 CN CN2010102210472A patent/CN101943598B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3206061C1 (en) * | 1982-02-19 | 1983-05-05 | Yamato Scale Co. Ltd., Akashi, Hyogo | Device for the automatic, weight-dependent sorting of objects |
CN87202731U (en) * | 1987-02-28 | 1988-05-25 | 南京第二钢铁厂 | Auto corrector for leather belt weigh |
DE29808236U1 (en) * | 1998-05-07 | 1998-07-30 | Riehle Bäckereigerätefabrik GmbH, 73479 Ellwangen | Device for the program-controlled compilation of mixtures of free-flowing bulk goods, in particular food ingredients |
CN101046406A (en) * | 2006-03-28 | 2007-10-03 | 铜陵市三爱思电子有限公司 | On-line belt balance checking process and portable checking device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109900348A (en) * | 2017-12-08 | 2019-06-18 | 奥豪斯仪器(常州)有限公司 | A kind of method that instrument and scale body arbitrarily match combination |
WO2020206853A1 (en) * | 2019-04-11 | 2020-10-15 | 深圳市深信信息技术有限公司 | Electronic scale monitoring method and system |
CN114910152A (en) * | 2022-05-30 | 2022-08-16 | 江西众加利高科技股份有限公司 | Precision correction method for weighing and metering instrument |
CN114910152B (en) * | 2022-05-30 | 2024-03-12 | 江西众加利高科技股份有限公司 | Precision correction method for weighing metering instrument |
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