摘要
针对电感、电容、频率测量仪器存在仪器类型繁多和操作复杂的问题,提出了电感电容频率一体化简易测量仪的设计方案,其中小电容、电感和频率测量通过LC振荡器计数测量,电解电容通过RC充放电和比较电路进行测量。电感测量范围:0.1μH～1 H,精度5%;小非电解电容测量范围:1 pF～2.2μF,精度5%;频率测量范围:50 Hz～400 kHz,绝对误差小于3Hz;电解电容测量范围:0.5μF～12 000μF,精度5%。经实践证明,测量仪工作稳定可靠,能够满足大多数测量场合的需求。
The LC frequency integration design scheme of simple measuring instrument is presented for the complicated operation in the inductance,capacitance,frequency measurement instrument.Instrument type is various and there are complex problems,in which contain small capacitance and inductance and frequency measurement by LC oscillator counter measure,electrolytic capacitors by RC charge and discharge measure and the comparison circuit.Inductance measuring range：0.1μH^1.0 H,accuracy of 5%;Small non electrolytic capacitor measurement range：1.0 pF^2.2μF,accuracy of 5%;Frequency measurement range：50 Hz^400 kHz,absolute error is less than 3 Hz.Electrolytic capacitor measurement range：0.5μF^12 000μF,accuracy of 5%.The practice has proved that the measuring instrument is stable and reliable,can meet the needs of most measurement occasions.
出处
《电子器件》
CAS
北大核心
2017年第2期511-515,共5页
Chinese Journal of Electron Devices
基金
国家自然科学基金项目(61403123
61305106)
关键词
电感电容频率
一体化测量仪
LC振荡器
充放电
比较器
LCF
integration of measuring instrument
LC oscillator
charge and discharge
comparator
作者简介
瓮嘉民（1972-），男，汉族，河南息县，副教授．主要研究方向为嵌入式系统应用和电力系统继电保护．1277109919@qq.com
