Magnetic suspension weighing system and control method thereof

Abstract

The invention provides a magnetic suspension weighing system and a control method thereof. The magnetic suspension weighing system comprises a box body; a weighing mechanism is mounted at the top of the box body, the weighing mechanism comprises a magnetic suspension assembly, a suspended object and an object containing disc, and the object containing disc is connected to the lower portion of the suspended object; the magnetic suspension assembly comprises a photoelectric displacement sensor, a circuit board, an electromagnetic coil and a display screen; the suspended matter is located under the electromagnetic coil. The photoelectric displacement sensor is used for measuring the distance between the suspended matter and the electromagnetic coil; and the circuit board is respectively connected with the photoelectric displacement sensor and the electromagnetic coil. According to the invention, the current on the electromagnetic coil can be automatically adjusted according to objects with different masses added in the containing tray, and the changing current accurately corresponds to the mass of the object, so that the purpose of indirect weight measurement is achieved; according to the weighing system, the gravity of an object is balanced through magnetic force, mechanical friction of a scale body of a traditional electronic scale is eliminated, and the measurement precision is improved.

Description

technical field [0001] The invention belongs to the field of magnetic suspension, and in particular relates to a magnetic suspension weighing system and a control method thereof. Background technique [0002] The errors of traditional electronic scales mainly come from the following aspects: four-corner eccentric load error, weighing error, discrimination error and repeatability error. The four-corner eccentric load error comes from the sensitivity of the load cell; the linear change of sensor weighing, zero drift and the rubbing of the weighing platform are all direct causes of the weighing error; the friction and stress in the mechanical connection are the main causes of the discriminative force error Source; Repeatability error is caused by some relatively fixed factors, such as changes in environmental conditions such as temperature, humidity, wind force, and gravity field during weighing measurement. Through the above analysis, it is found that the four-corner eccentri...

AI Technical Summary

Problems solved by technology

Through the above analysis, it is found that the four-corner eccentric load error, weighing error, and discrimination force error are all related to the design structure of the weighing system, and the impact of friction on the weighing accuracy cannot be avoided during the weighing process.

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