Balance following algorithm of weighing zero point

Abstract

The invention belongs to the technical field of electronic scales, and particularly relates to a balance following algorithm for a weighing zero point, which comprises the following steps of: S1, automatically checking a zero point updating subprogram every other time period; S2, extracting a sampling value of the scale pan, judging whether the sampling value is smaller than the minimum weighing value of the electronic scale or not, if not, judging that a heavy object exists on the scale pan, and executing the step S1; if yes, starting a zero updating subprogram; S3, judging whether the variation of the sampling value relative to the old sampling value is greater than 0.1 time of the minimum precision value of the electronic scale or not, determining a new sampling value and storing the new sampling value in a zero point buffer array; and S4, setting the tail cutting average value of the zero point buffer array as a zero point update value, and updating the zero point update value by azero point update subprogram, so that the balance following algorithm of the weighing zero point has the characteristics of being slow, tiny and memorized, and the zero point value can be automatically updated in real time without additionally changing a hardware circuit or carrying out complex processing on a software level. Development cost is greatly reduced, and the applicability is very high.

Description

technical field [0001] The invention belongs to the technical field of electronic scales, in particular to a balance following algorithm for weighing zero point. Background technique [0002] With the increasing application of electronic scales, the market's requirements for its accuracy are becoming more and more stringent. Among them, the zero drift problem of electronic scales has always been a problem that electronic scales need to solve. There are many reasons for the change of the zero value of the electronic scale, such as unstable power supply voltage, variable values ​​of component parameters, and changes in ambient temperature. The most important factor is the change of temperature, because the transistor is a temperature sensitive device, when the temperature changes, its parameters UBE, β, and ICBQ will all change, which will eventually lead to a shift in the static operating point of the amplifier circuit. Secondly, the various materials and manufacturing proc...

AI Technical Summary

Problems solved by technology

[0007] In order to overcome the problem of inaccurate measurement due to the drift of the weighing zero value of the electronic scale in the state of unexpected tilt or long-term operation in the prior art, the present invention proposes a zero-point following algorithm that can automatically update the zero-point value in real time, through The following technical solutions are realized:

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