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基于壓電傳感器的零點(diǎn)漂移改善電路的研究
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中北大學(xué)

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高動(dòng)態(tài)短航時(shí)彈用半捷聯(lián)慣性測量系統誤差自補償理論與方法研究


Research on Zero-drift Improvement Circuit Based on Piezoelectric Sensor
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    摘要:

    針對彈藥發(fā)射及侵徹過(guò)程中高速沖擊信號的測量需求,本文設計了一種基于電荷傳感器的高沖擊彈載侵徹加速度測量電路,解決了常規彈載記錄儀在侵徹過(guò)程中壓電傳感器因高過(guò)載而產(chǎn)生的嚴重信號值零點(diǎn)漂移的現象。通過(guò)對壓電傳感器的零點(diǎn)漂移現象的機理分析以及推導電荷轉換等效電路中零點(diǎn)漂移電壓的相關(guān)表達式,提出在前端采集的調理電路中用晶體管與運算放大器搭建了加推挽電流放大級的電荷放大器的方案,增強電路驅動(dòng)能力,加快壓電傳感器放電速度。本設計可替代例如小波分析等事后處理數據消除零點(diǎn)漂移的算法,在信號源頭處解決零點(diǎn)漂移現象,滿(mǎn)足測量常規彈藥侵徹過(guò)程高過(guò)載連續動(dòng)態(tài)特性的實(shí)時(shí)性測量,對研究這類(lèi)工程問(wèn)題的人員實(shí)現對測量電路改進(jìn)具有指導意義。

    Abstract:

    Aiming at the measurement demand of high-speed impact signal in the process of ammunition launch and penetration, a high impact projectile penetration acceleration measurement circuit based on charge sensor is designed in this paper, which solves the phenomenon of serious signal value zero drift caused by high overload of piezoelectric sensor in the process of penetration of conventional missile recorder. Through mechanism analysis on the phenomenon of piezoelectric sensor's zero drift and derivation of charge convert zero drift in the equivalent circuit voltage related expression, is put forward in the front-end acquisition circuit with operational amplifiers and transistors built with push-pull amplifier stage current charge amplifier, enhance the capacity of drive circuit, speed up the discharge of piezoelectric sensor. This design can replace the algorithms such as wavelet analysis to eliminate zero shift after processing data, and solve the zero shift phenomenon at the signal source, so as to meet the real-time measurement of high overload continuous dynamic characteristics of conventional ammunition penetration process, which has guiding significance for the realization of the measurement circuit improvement for the personnel studying this kind of engineering problems.

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王帥,李杰,張德彪,孫寧,江杰.基于壓電傳感器的零點(diǎn)漂移改善電路的研究計算機測量與控制[J].,2022,30(2):305-313.

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歷史
  • 收稿日期:2021-11-22
  • 最后修改日期:2021-12-22
  • 錄用日期:2021-12-31
  • 在線(xiàn)發(fā)布日期: 2022-02-22
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