Multi-channel digital eccentric load error intelligent correction load cell and its weighing method

Abstract

Disclosed are a multichannel digitalized intelligent correcting and weighing sensor for an unbalanced load error and a weighing method therefor, comprising an elastic body (1), wherein the elastic body (1) is constituted by a cross beam (2) in the middle and a left fixing part (3) and a right fixing part (4) at two ends, a mounting hole (5) is formed on the left fixing part (3) and a mounting hole (5) is provided on a lower surface of the right fixing part (4), an upper surface of the right fixing part (4) is provided with a groove (12) for placing a circuit board (6), a plurality of through-holes (7) penetrating through the cross beam (2) are provided inside the cross beam (2), the positions of an upper and a lower surface of the cross beam (2) corresponding to the through-holes (7) are strain areas, the upper and the lower surfaces of the cross beam (2) are respectively provided with two groups of resistance strain devices, each group of resistance strain device is composed of four resistance strain meters (8), wherein the four groups of resistance strain devices are welded with the circuit board (6) via a conducting wire, the circuit board (6) is connected in communication with an external display unit (13), and the upper and the lower surfaces of the cross beam (2) and an outer surface of the groove (12) are all coated with anti-corrosion processing layers.

Description

technical field [0001] The invention relates to a multi-channel digitized eccentric load error intelligent correction weighing sensor and a weighing method thereof, belonging to the technical field of sensor structures. Background technique [0002] First of all, the traditional single-point resistance strain gauge load cell has a strong anti-offset load capacity in theory, but due to the error caused by machining, the deviation of the patch position and the inhomogeneity of the material of the resistance strain gauge itself, etc., All of these will lead to serious unbalanced load errors in single-point resistance strain load cells, which must be corrected before they can be applied to electronic scales. The current correction method is to install the load cell on the test platform, apply a load of 1 / 3 range on the center and four corners of the platform in sequence, and use a file to file different parts for correction according to the size of its output. Moreover, when th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problems in the above-mentioned prior art that the adjustment of weighing accuracy needs to be carried out in a setback mode, which is time-consuming and labor-intensive, destroys the anti-corrosion treatment layer outside the load cell, reduces the protection effect, and needs to use temperature sensitivity to compensate resistance and temperature zero point. Compensation resistance, zero point output compensation resistance for temperature sensitivity, temperature zero point output, zero point output compensation, time-consuming and low-precision technical problems, to provide a setback adjustment, easy to operate, labor-saving and time-saving, high measurement accuracy Multi-channel digital eccentric load error intelligent correction load cell

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