High-precision weighing system

Abstract

The invention discloses a high-precision weighing system. A precision reference voltage source is adopted to form a +10V precision voltage stabilization source, a transistor is adopted to expand the output range of current to drive a strain resistance-type sensor, and the constant voltage source ripple is smaller than 0.1 mV. The signal conditioning section of the system of the invention adopts a two-level amplification technology, a preamplifier is adopted to improve a signal signal-to-noise ratio, two-level amplification is adopted to realize cascading of differential amplifiers, and thus, the cascaded common-mode noise for the amplifiers is reduced. A 24-bit analog-to-digital converter is adopted to acquire signals amplified through a secondary amplifier, the signals are transmitted to a microprocessor via a serial communication protocol for being displayed and outputted. Compared with the traditional technology, the high-precision weighing system has the advantages that the gain is as high as 105; the precision is high; the linear range is wide; the gain is programmably controlled and automatically adjusted; wireless data transmission is realized; the noise is low; the power consumption is low; the cost is low; the measurement precision is 0.01 g; the measurement range is 0 to 100 g; and the precision is double that of the traditional technology.

Description

technical field [0001] The invention relates to the design of a high-precision weighing system. Background technique [0002] The development of things goes through the development process from low-level to high-level, from simple to complex, and from low-level to high-level, so the development process of electronic scales is no exception. It has gone through a process from crude to delicate, from simple to complex, and from single function to multi-function. With the prosperity and recovery of the economy after World War II, the traditional weighing technology can no longer meet the needs of the society, so the idea of ​​automation of the weighing process is proposed, for which electronic technology has penetrated into the weighing instrument manufacturing industry. Especially in the past 30 years, electronic weighing instruments have played an important role in the work, such as on-site weighing in the technological process, quantitative weighing of ingredients, etc., ele...

AI Technical Summary

Problems solved by technology

However, comparing the quality and quantity of electronic weighing instruments, there is still a certain gap between my country and most developed countries. The main gap is that the equipment is not advanced enough, the process is not perfect, the product types are few, the functions are not complete, and the stability and reliability of the equipment are relatively low. Poor

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