Design of current signal measurement system for quartz accelerometer

ZHAO Lei; JI Wenxin; QI Hangtian; ZHANG Xiaolin

doi:10.13873/J.1000-9787(2021)09-0078-03

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Design of current signal measurement system for quartz accelerometer

更新时间：2025-09-11

- Design of current signal measurement system for quartz accelerometer
- Issue 9, Pages: 78-80+84(2021)
- 作者机构：
  
  北京航空航天大学电子信息工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/J.1000-9787(2021)09-0078-03
  CLC： TH824.4
- Published：2021
- 稿件说明：
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ZHAO Lei, JI Wenxin, QI Hangtian, et al. Design of current signal measurement system for quartz accelerometer[J]. 2021, (9): 78-80+84.
DOI：

ZHAO Lei, JI Wenxin, QI Hangtian, et al. Design of current signal measurement system for quartz accelerometer[J]. 2021, (9): 78-80+84. DOI： 10.13873/J.1000-9787(2021)09-0078-03.

摘要

以某航天飞行器加速度计电流信号测量项目为背景

对8个十倍程(160 dB)范围内纳安(nA)级微弱电流的测量探讨了三种方法:电流—电压(I-V)线性转换测量

电流—频率(I-F)转换测量

电流—电压(I-V)对数转换测量。提出了I-F转换和高位模/数(A/D)转换的对比模型和I-V对数转换的分辨率转换的对应关系。采用电流—电压(I-V)对数转换测量方法制作6通道采集板卡

经北京东方计量测试研究所测量证明能完成160 dB动态范围

误差小于10%的电流测量。

Abstract

Based on the current signal measurement project of an aerospace vehicle accelerometer

three methods are discussed for measurement of nA weak current in the range of 8 decuple（160 dB）:current-voltage（I-V）linear conversion measurement

current-frequency（I-F）conversion measurement

and current-voltage（I-V）logarithmic conversion measurement.The comparison model of I-F conversion and high AD conversion is built innovatively.The resolution transformation effect of I-V logarithmic conversion is proposed.The current-voltage（I-V）logarithmic conversion measurement method is used to make the 6-channel acquisition board card

which is proved by Beijing Oriental metrology and testing institute to be able to complete the current measurement within 160 dB and error less than 10 %.

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