一种可调恒流源的调理测量方法

An Adjustable Constant Current Source Conditioning Measurement Method

恒流源是一种常见的电子原器件,恒流源在使用中会因为容抗和阻抗等问题造成其电流的误差。本文设计了一种通过硬件和软件结合的调理测量方法,用于提高电流的精度。硬件通过运放电路,软件通过把电流分为数段,然后通过软件对每段进行分析后,通过乘上一个系数来保证检测的电流的精度。本文中用到的芯片有电压基准LT1460,基本运放ADTL082,AD采集LTC1402,以及单片机GD32F207。

Current source is a common electronic component.Constant current source will cause current error because of capacitance reactance and impedance problems in use.In this paper,a conditioning measurement method combining hardware and software is designed to improve the accuracy of current.The operational amplifier circuit is used in hardware.The software divides the current into several sections,after analyzing each section.The software multiplies a coefficient to make the actual current approach the standard current.The chips used in this paper are power reference chip LT1460,Operational amplifier chip ADTL082,AD acquisition chip LTC1402 and MCU GD32F207.