| 基于单片机的数字工频表 |
| |
| 引用本文： | 洪威.基于单片机的数字工频表[J].黑龙江电子技术,2012(9):180-184. |
| |
| 作者姓名： | 洪威 |
| |
| 作者单位： | 河海大学能源与电气学院,南京211100 |
| |
| 摘 要： | 系统采用单片机（STC89C51）设计一种可以测量工频参数的仪表。首先在整个系统的前端接入电流传感器和电压传感器,通过程控放大器之后,进行去混叠滤波,滤出其中的高频成分,在频域里进行FFT变换计算电压有效值、电流有效值、有功功率,从而得到无功功率,最终通过五个按键分别控制显示在数码管上。通过实验进行验证,该系统可靠性强,比普通的指针式仪表具有很强的优越性,在频率内进行测量精度高,具有很强的实用性。
|
| 关 键 词： | 单片机 工频 程控放大 FFT变换 |
The digital power frequency meter based on microcontroller |
| |
| Authors: | HONG Wei |
| |
| Institution: | HONG Wei ( School of Energy and Electricity, Hohai University, Nanjing 211100, China) |
| |
| Abstract: | A microcontroUer（ STC89C51 ） is applied in this system to design an instrument measuring the power frequency parameter. The switches in the front-end are a current transformer and a voltage transformer, and then it is the p filtered out. Through FFF in th rogrammable amplifier. After that, the radio-frequency components are e frequency domain, the voltage effective value and current effective value, active power and reactive power are calculated, which will respectively displayed on the nixie tube with the help of 5 keys. The experiment verified, the reliability of the system is proved. Compared with the normal pointer instrument, the instrument designed here is superior to the aspects of frequency measurement precision and practicability. |
| |
| Keywords: | microcontroller frequency parameters program-controlled amplify FFT transform |
| 本文献已被 维普 等数据库收录！ |
|
