一种小信号放大测量电路的设计
针对在恶劣工作环境中微弱信号无法准确测量的情况，设计了一种以高精度仪表放大器AD623为核心器件的放大测量电路，实现了对0mV～25mV范围内电压信号的精准放大，同时采用高精度光隔离器ACPL-C87B，隔离测量端对采集端的影响。经试验测量，该小信号放大测量电路能达到百分之一精度，此外该电路还具有抑制共模干扰、抑制温漂、稳定性好、抗干扰性强等特点。...
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| Published in | 电测与仪表 Vol. 52; no. 4; pp. 96 - 100 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
中北大学电子测试技术国家重点实验室，太原030051
2015
仪器科学与动态测试教育部重点实验室，太原030051%中北大学电子测试技术国家重点实验室,太原,030051 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1001-1390 |
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| Abstract | 针对在恶劣工作环境中微弱信号无法准确测量的情况，设计了一种以高精度仪表放大器AD623为核心器件的放大测量电路，实现了对0mV～25mV范围内电压信号的精准放大，同时采用高精度光隔离器ACPL-C87B，隔离测量端对采集端的影响。经试验测量，该小信号放大测量电路能达到百分之一精度，此外该电路还具有抑制共模干扰、抑制温漂、稳定性好、抗干扰性强等特点。 |
|---|---|
| AbstractList | TM93; 针对在恶劣工作环境中微弱信号无法准确测量的情况，设计了一种以高精度仪表放大器AD623为核心器件的放大测量电路，实现了对0mV～25mV范围内电压信号的精准放大，同时采用高精度光隔离器ACPL-C87B，隔离测量端对采集端的影响。经试验测量，该小信号放大测量电路能达到百分之一精度，此外该电路还具有抑制共模干扰、抑制温漂、稳定性好、抗干扰性强等特点。 针对在恶劣工作环境中微弱信号无法准确测量的情况，设计了一种以高精度仪表放大器AD623为核心器件的放大测量电路，实现了对0mV～25mV范围内电压信号的精准放大，同时采用高精度光隔离器ACPL-C87B，隔离测量端对采集端的影响。经试验测量，该小信号放大测量电路能达到百分之一精度，此外该电路还具有抑制共模干扰、抑制温漂、稳定性好、抗干扰性强等特点。 |
| Abstract_FL | In view of the fact that weak signals cannot be accurately measured in the poor working environment, this paper proposed an amplifying measurement circuit which had the high-precision instrumental amplifier AD623 as the core device.This design could accurately amplify the voltage signals ranging from 0mV to 25mV and it also adopted a high-precision optical isolator ACPL-C87B to isolate the effect of the measuring end on the collection end.Through practical tests, it was verified that the weak-signal amplifying measurement circuit could achieve the accuracy of one percent and it also had the characteristics of suppressing common mode interference, suppressing temperature drifting, good stability and strong anti-interference. |
| Author | 甄国涌 储俊 |
| AuthorAffiliation | 中北大学电子测试技术国家重点实验室,太原030051 仪器科学与动态测试教育部重点实验室,太原030051 |
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| Author_FL | Zhen Guoyong Chu Jun |
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| Author_xml | – sequence: 1 fullname: 甄国涌 储俊 |
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| DocumentTitleAlternate | Design of the measurement circuit about weak-signal amplifying |
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| Keywords | 塞林更滤波器 HCNR201 ACPL-C87B error analysis 小信号 AD623 Sallen-Key filter 高精度仪表放大器(AD623) 高精度线性光耦(HCNR201) 误差分析 weak-signal |
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| Notes | Zhen Guoyong, Chu Jun （ 1. National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan 030051, China. 2. Key Laboratory of Instrumentation Science ＆ Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China） 23-1202/TH In view of the fact that weak signals cannot be accurately measured in the poor working environment, this paper proposed an amplifying measurement circuit which had the high-precision instrumental amplifier AD623 as the core device.This design could accurately amplify the voltage signals ranging from 0mV to 25mV and it also adopted a high-precision optical isolator ACPL-C87B to isolate the effect of the measuring end on the collection end.Through practical tests, it was verified that the weak-signal amplifying measurement circuit could achieve the accuracy of one percent and it also had the characteristics of suppressing common mode interference, suppressing temperature drifting, good stability and strong anti-interference. A |
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| PublicationTitle | 电测与仪表 |
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| PublicationYear | 2015 |
| Publisher | 中北大学电子测试技术国家重点实验室，太原030051 仪器科学与动态测试教育部重点实验室，太原030051%中北大学电子测试技术国家重点实验室,太原,030051 |
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| SubjectTerms | ACPL-C87B 塞林更滤波器 小信号 误差分析 高精度仪表放大器（AD623） 高精度线性光耦（HCNR201） |
| Title | 一种小信号放大测量电路的设计 |
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