Correction Method of Offset Load Error of Digital Truck Scale Based on Least Square Method

Abstract

The invention provides a digital truck scale offset load error correction method based on a least square method, belonging to the field of weighing and metering and relating to a correction method for reducing the digital truck scale offset load errors, particularly relating to the correction of the truck scale offset load errors by means of the least square method. According to the method, the offset load errors of a digital truck scale are corrected by means of the least square method, namely, the offset load errors are reduced by acquiring a better angle difference coefficient through optimization, for a commonly used digital truck scale, the sensor values under the state that the scale is empty are written down , and then the sensor values under the angle pressing operation for many times are written down, the frequency of the angle pressing operation is greater than or equal to the number of the sensors, the values are substituted into the equation derived by the least square method to obtain an optimal angle difference coefficient. The method is simple in calculation and can be conveniently transplanted into a microcontroller. The weighing weight is calculated by using such a method, the levelness of the installation of a digital electronic truck scale is improved and the errors caused by the inconsistency of the sensitivity of sensors can be reduced, and the weighing accuracy of the truck scale is improved.

Description

technical field [0001] The invention belongs to the field of weighing and measurement, and relates to a correction method for reducing the eccentric load error of a digital truck scale, in particular to using the least square method to correct the eccentric load error of a truck scale. Background technique [0002] Electronic truck scales play an important role in the measurement of bulk goods. Compared with the mechanical truck scales used in the early days, electronic truck scales have simple structure, convenient operation and higher precision, gradually replacing mechanical truck scales. Electronic truck scale is mainly composed of three parts: load cell, scale body and weighing display instrument, and can be equipped with large screen, printer, software management system, terminal, etc. according to user needs. According to different sensor output signals, electronic truck scales can be divided into analog electronic truck scales and digital electronic truck scales. W...

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Problems solved by technology

Liu Xi et al.'s "Auto Scale Offset Error Compensation Algorithm", "Electronic Technology", June 2014, P16-19, although this commonly used method in the paper is simple and easy to calculate, but the obtained angle coefficient and pressure angle The position is related, and because the position of the weight loading point is uncertain, the actual angle difference coefficient is not unique, so this method is difficult to obtain the optimal angle difference coefficient

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