| 高精度应变信号采集模块的设计 |
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| 引用本文： | 吴峻,陈宇,张伟宁,黄文君.高精度应变信号采集模块的设计[J].化工自动化及仪表,2012,39(5):615-618. |
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| 作者姓名： | 吴峻 陈宇 张伟宁 黄文君 |
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| 作者单位： | 1. 浙江医学高等专科学校图书信息中心,杭州,310053
2. 浙江中控技术股份有限公司,杭州,310053 |
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| 摘 要： | 设计了应用于称重传感器的高精度应变信号采集模块,该模块采用四线制供电方式的传感器并联桥路,提高了模拟信号处理的抗干扰能力;采用高精度A/D转换器ADS1213芯片实现数字信号转换;转换器与CPU之间采用光耦隔离提高了抗干扰能力;通过软、硬件结合的信号校正方法提高了信号采集精度,研制了应用于集散控制系统的两路应变信号采集模块,实现称重传感器的应变信号实时采样和处理。
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| 关 键 词： | DCS系统 信号采集 应变信号 称重传感器 |
Design of High Precision Strain Signal Acquisition Module |
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| WU Jun
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CHEN Yu
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ZHANG Wei-ning
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HUANG Wen-jun.Design of High Precision Strain Signal Acquisition Module[J].Control and Instruments In Chemical Industry,2012,39(5):615-618. |
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| Authors: | WU Jun CHEN Yu ZHANG Wei-ning HUANG Wen-jun |
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| Affiliation: | 1.Network Center of Zhejiang Medical College,Hangzhou 310053,China; 2.SUPCON Technology Co.,Ltd.,Hangzhou 310053,China) |
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| Abstract: | A high-precision strain signal acquisition module for weighing sensors was designed,including the parallel bridge road for sensors which adopting four-wire power supply mode to improve anti-interference capacity in analog signal processing;and the ADS1213 chip for high-precision A/D converter can realize digital signal conversion;the light coupling isolation between converter and CPU can promote anti-interference.By applying the signal correction method which boasting of a combination of software and hardware,the signal acquisition accuracy can be improved.Two-way strain signal acquisition module developed for DCS can realize real-time sampling and processing of strain signals from weighing sensors.The test results show that this module can have high-precision signal acquisition and processing realized. |
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| Keywords: | DCS signal acquisition strain signal weighing sensor |
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