Design And Application Research Of High Precise Electronic Balance

Traditional balance, which precision can adjust very accurate, has many shortages; therefore, its application is limited. However, demand for modern science technology, agriculture and industry, electronic balance has such characteristics as fast, accurate, consecutive, and automatic etc., at the same time; it can eliminate error made by people, which qualify electronic balance as efficient measurement in legal management, and the control of industrial production. Only combining modern sensor, electronic and computer technology together, high-precision electronic balance can suit for these demands. High-precision electronic balance except for determined by the improvement of design and technology of sensors, at the same time, which depend on the improvement and the extension of sensors in the application technology and field.This article choose resistance-strain sensors to design high- precision electronic balance ,because it has such advantages as easy production, well-rounded processes, low cost and price, therefore it is preferred at home and abroad. Resistance-strain sensors are based on four essential parts (gravity), strain(ε), resistance variation( ΔR), and voltage output( ΔU). Following the improvement of design, technology, measure precise and reliability of resistance-strain sensors now prevail among the domain of weighting.Since sensors is the prime pack unit for data acquisition, and the data error caused by sensors effect great on result, so sensor play a great role in high-precision electronic balance. Because it exist the non-linearity between signals acquisition through sensors and their corresponding true value, therefore, linearization the output of sensor, adjusting the nonlinearity error and researching nonlinearity of sensor is an important subject. To eliminated or weakened the influence of interference signals and improve the system precise, I adopt a method of micro computer recognized sector characteristics of curve logically, to decide the self adaptation interval partition and times of fitting multinomial. Since microprocessors have led to another revolution of the technology of weight measurement: it has revolutionized the resistance-strain sensors. As a result, high precision electronic balance is capable of being used in more widely area.This paper expand on the assembling, and its selection, especially devoting much space to electronic sensor's zero wander and stability, At the same time, the interface function of microcomputer is application to distant transmit and process the data gathered by electronic balance. Compared with former electronic balance, the design precision of high-precision electronic balance has been improved from 0.1~0.01g to 0.001g.