CN1472513A - Inner weight correcting method for electronic high-accuracy balance - Google Patents

Abstract

The method includes steps as the follow. Weight value P1 of first proof weight is weighed out through the present balance and to stove it in microcomputer; weight value P2 of a standard weight having the same nominal value with the first proof weight is weighed out by the same balance and to store it in microcomputer; D-value is calculated out with the microcomputer and D=P2-P1 is used as correction for the first proof weight; D is led in when calibrating is carried on to obtain correct calibration coefficient K and to store it in microcomputer.

Description

The method of the inner weight correcting of high-precision electronic balance

Technical field

The present invention relates to a kind of method of inner weight correcting of high-precision electronic balance, belong to the weighing apparatus field.

Background technology

Because the relative accuracy of high-precision electronic balance is very high, all 1,000,000/more than, when being subjected to variation of ambient temperature, the temperature variation of balance self energising back heating, components and parts aging, the variation of air pressure, influence of various factors such as the variation of horizontal level all can make weighing results incorrect, therefore, in a lot of high-precision electronic balances, inner correcting-weight is being housed all, when when being subjected to external environment influence such as temperature.Immediately with inner correcting-weight balance is proofreaied and correct again, revised correction coefficient, make balance recover correct weighing results, this is very important to weighing of high-precision electronic balance.And the production of the interior school counterweight of high-precision electronic balance has higher requirement, it is to the counterweight density of material, magnetic susceptibility, the counterweight surface smoothness all has outside the very high requirement, accuracy to the counterweight actual mass has higher requirement, actual graduation value as balance is 0.1mg, then the actual mass error of inner correcting-weight just should be less than 0.05mg, such requirement brings difficulty for the adjustment in the counterweight production run, simultaneously because wearing and tearing that frequent use brings and oxidation etc. cause the counterweight mass change, produce correcting action, this revises quite difficulty to inner correcting-weight, does not still have the bearing calibration of effective inner correcting-weight at present.

Summary of the invention

School counterweight quality accuracy requirement in the purpose of this invention is to provide in a kind of reduction the, and the method for the inner weight correcting of the high-precision electronic balance that can revise easily the interior school counterweight that weares and teares, oxidation causes enamel sign indicating number mass change.

Technical scheme of the present invention is to ask the algorithm of correction coefficient to realize usually with a trace routine and change, and its method step is as follows:

1, weighs up the gravimetric value P1 of interior school counterweight by the weighing system of this balance, and deposit microcomputer in;

2, on above-mentioned same balance, weigh up a nominal value with above-mentioned in the weight P2 of the identical standard test weight of school counterweight, and deposit microcomputer in;

3, calculate difference D in microcomputer, D=P2-P1 is as the correction of interior school counterweight;

4, according to formula:

Try to achieve correction coefficient K, deposit microcomputer in.

This method is simple and convenient, can make the internally accuracy requirement reduction of school sign indicating number quality in the sign indicating number process of school in producing, and reduces production costs, and can revise easily the interior school counterweight that weares and teares, oxidation causes enamel sign indicating number mass change.

Description of drawings

Fig. 1 is this method program flow diagram.

Embodiment

This enforcement is done an explanation according to process flow diagram, and it is 200 gram ranges that example has a table scale amount, and actual graduation value is the electronic balance of 0.0001 gram.The nominal value of interior school counterweight is 200 grams.Start-up routine at first, school counterweight gravimetric value P1 was 200.0010 grams in weighing system by this balance weighed up, deposit microcomputer memory in, then with one 200 gram, error is less than 0.05 milligram standard test weight, and also weighing up its weight P2 at the weighing system of this balance is 200.0020 grams, and obtaining its difference D at microcomputer is D=P2-P1, for 200.0020-200.0010=.0010 gram be in the correction of school counterweight, according to formula:

$=0.999990$ Multiply each other with this K value and weighing data, then obtain exact figure and show.

Its weighing process is:

The simulating signal of LOAD CELLS converts digital signal to through A/D and is input in the microcomputer, carries out showing that by display alleged atural object is heavy after the data that obtain as processing such as zero point, linearizations multiply each other with the correction coefficient K of having put at microcomputer memory in microcomputer.

Claims (1)

1, a kind of method of inner weight correcting of high-precision electronic balance, its method step is:

(1) weighs up the gravimetric value P1 of interior school counterweight by the weighing system of this balance, and deposit microcomputer in;

(2) on above-mentioned same balance, weigh up a nominal value with above-mentioned in the weight P2 of the identical standard test weight of school counterweight, and deposit microcomputer in;

(3) calculate difference D in microcomputer, D=P2-P1 is as the correction of interior school counterweight;

(4) according to formula:

Try to achieve correction coefficient K, deposit microcomputer in.

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