AD7730在高精度电子称中的应用.pdf

文档介绍：兵工自动化测控技术 O. I. Automation
2005 年第 24 卷第 2 期 Measurement and Control Technique 2005, Vol. 24, No. 2
文章编号:1006-1576(2005)02-0069-02
AD7730 在高精度电子称中的应用
郭彪 1,骆远福 2,孔淼 2,李作武 2
(1. 西南科技大学信息与控制工程学院绵阳四川 621002;2. 西南自动化研究所, 绵阳四川 621000)
摘要:AD7730 双通道全差分模拟输入可直接和传感器输入信号相连。高精度电子称测量电路由桥式力传感器、
基准电压电路、AD7730 和 32 位 ARM 单片机组成。该电子称通过片上串行通讯对同一采样点进行多次采样,再进
行均方根运算获得高精度,其分辨率可达到 mg 级。
关键词:AD7730;ARM 单片机;力传感器;电子称
中图分类号: 文献标识码:A
Application of AD7730 in High-Accuracy Electronic Balance
GUO Biao1, LUO Yuan-fu2, KONG Miao2, LI Zuo-wu2
(1. College of Information & Control Engineering, Southwest University of Science & Technology, Mianyang 621002, China;
2. Southwest Institute of Automation, Mianyang 621002, China)
Abstract: The inputs of the analog signals of AD7730 with the double channels of whole difference is directly linked to
output of sensor. The high-accuracy electronic balance is made up of bridge type strength sensor, basic voltage circuit,
AD7730, ARM single chip. The same sampled point was sampled many times with the electron balance through the serial
communication on the chip, and then root mean square was calculated to gain higher accuracy and make the resolution rate
reach mg grade.
Keywords: AD7730; ARM single chip; Weight Sensor; Electronic balance
1 引言称测量及数据采集单元。
AD7730 双通道全差分模拟输入可直接和传感 2 采用 AD7730 的电子称测量及数采单元
器输入信号相连,