基于PXI的长时间低零漂斩波式积分器 |
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引用本文: | 许光俊,季振山,王勇,袁中权.基于PXI的长时间低零漂斩波式积分器[J].测控技术,2014,33(2):130-133. |
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作者姓名: | 许光俊 季振山 王勇 袁中权 |
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作者单位: | 中国科学院 等离子体物理研究所;中国科学院 等离子体物理研究所;中国科学院 等离子体物理研究所;中国科学院 等离子体物理研究所 |
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基金项目: | 国家科技部“973”项目ITER计划专项(2012GB105000,2011GB101000) |
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摘 要: | 为了避免传统模拟积分器积分电容泄漏,减小简单数字式积分器前端模拟器件的固有噪声及A/D的量化等误差,设计了基于PXI的长时间低零漂斩波式积分器系统。该系统由PXI机箱、数据采集卡和前端信号处理模块组成硬件平台,对信号进行调理和采集,采样率达到200 kS/s,LabVIEW语言和RTX实时系统构成软件设计平台,对信号进行积分、实时扣除零漂等软处理。通过对系统的测试,此积分器有效地降低了零点漂移,比传统模拟、数字积分器具有更加优越的性能。
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关 键 词: | 积分器 斩波式 低零漂 PXI |
A Digital Long-Time and Low Drift Chopper Integrator Based on PXI |
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Abstract: | The digital long-time integrator with a chopper input stage is designed based on PXI to avoid nonlinear error,capacity leakage of traditional analog integrator and quantization error of front A/D of simple digital integrator.The hardware platform with PXI chasis,data acquisition board and front signal processing module is designed.The LabVIEW language and RTX real-time system are used for software design platform.The signals processed and acquired at 200 kS/s are integrated and its drift is reduced by LabVIEW in RTX real-time system.By testing the system,the zero drift of the integrator is effectively reduced,which has more excellent performances than traditional analog and digital integrator. |
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Keywords: | integrator chopper low drift PXI |
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