CN1153306A - 时分割补偿法 - Google Patents

时分割补偿法 Download PDF

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Publication number
CN1153306A
CN1153306A CN95121607A CN95121607A CN1153306A CN 1153306 A CN1153306 A CN 1153306A CN 95121607 A CN95121607 A CN 95121607A CN 95121607 A CN95121607 A CN 95121607A CN 1153306 A CN1153306 A CN 1153306A
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time
signal
output
compensation method
error
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戴鹏辉
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Abstract

电测技术中消除或减小测量电路中的温漂，零漂，失调和偏置误差等.实施方法：用时分割技术，在被测信号处理的同一回路，输入已知信号，根据已知信号的输出推算出电路此时的处理误差，并及时对被测信号的输出直接进行补偿。如图，当A在1位采样时，G输出Y′=K(X+Z)+F(T′)+H，在2位采样时，G输出Y″=KZ+F(T″)+H[H为失调，偏置等因素引起的误差.F(T)为温度T引起的误差，T′=T″]、Y=KX无误差。

Description

时分割补偿法
所属领域：电测技术，测量误差的消除。参考技术：1.电测技术基础，测量误差之系统误差及其消除方法。
      2.工业电子技术，模拟信号处理电路。目    的：减小模拟信号的测量误差。内    容：用时分割技术，在被测信号处理的同一回路，输入已知信号，根据已知信号的输出推算出电路此时的处理误差，并及时对被测信号的输出直接进行补偿。
先设信号处理环节G为线性，输入为X的理想输出应为Y＝KX(K为常数)，如图1。
在实际电路中，输出为Y＝KX+F(T)+H其中F为温度T的函数，包括温漂，零漂等；H为失调，偏置等因素引起的误差。如图2，采用模拟开关或多路选择器A，引入0和Z输入，增加控制环节和减法运算环节，对G进行时分割补偿。
当A在1位采样时，G输出Y′＝K(X+Z)+F(T′)+H
当A在2位采样时，G输出Y″＝KZ+F(T″)+H
选择适当的采样周期，使T′→T″F(T′)-F (T″)＝ΔF(T)→0
选择适当的Z，使Y″＞0，便于计算处理。
此时，Y＝Y′-Y″＝KX+ΔF(T)→KX，即为理想结果，G的信号处理误差被消除或减小。
如果G为非线性环节，根据Y′，Y″和Z的关系也能推算出电路的处理误差，并给予补偿。与现有误差补偿方法相比：
对温漂，零漂的补偿，现有方法一般用热敏电阻，为了进行有效的补偿，必须了解温漂曲线，再选取适当的补偿电阻。补偿效果难以令人满意，对失调，偏置误差可以通过电位器进行调整。
时分割补偿法，则无须了解温漂曲线，可对多个模拟信号处理环节因温漂，零漂，失调，偏置等因素引起的误差进行统一补偿。补偿效果好，且使电路调试简单化，对元件要求也可降低。

Claims (1)

1.电测技术中，用时分割技术，在被测信号处理的同一回路，输入已知信号，根据已知信号的输出推算出电路此时的处理误差，并及时对被测信号的输出直接进行补偿的方法。
CN95121607A 1995-12-29 1995-12-29 时分割补偿法 Pending CN1153306A (zh)

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Application Number Priority Date Filing Date Title
CN95121607A CN1153306A (zh) 1995-12-29 1995-12-29 时分割补偿法

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CN95121607A CN1153306A (zh) 1995-12-29 1995-12-29 时分割补偿法

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CN1153306A true CN1153306A (zh) 1997-07-02

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CN95121607A Pending CN1153306A (zh) 1995-12-29 1995-12-29 时分割补偿法

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CN (1) CN1153306A (zh)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103149395A (zh) * 2013-03-01 2013-06-12 天津大学 一种用于多路模拟量采集卡的温度补偿方法
CN111623891A (zh) * 2020-05-12 2020-09-04 北京安酷智芯科技有限公司 一种温漂校正电路及校正方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103149395A (zh) * 2013-03-01 2013-06-12 天津大学 一种用于多路模拟量采集卡的温度补偿方法
CN103149395B (zh) * 2013-03-01 2015-09-23 天津大学 一种用于多路模拟量采集卡的温度补偿方法
CN111623891A (zh) * 2020-05-12 2020-09-04 北京安酷智芯科技有限公司 一种温漂校正电路及校正方法
CN111623891B (zh) * 2020-05-12 2021-06-29 北京安酷智芯科技有限公司 一种温漂校正电路及校正方法

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