-
shuanglushuzihecheng
摘要
电能表作为用电量的测量工具广泛的应用于各种场合。在电能表校表系统中,需要的最基本的输入信号源是高精度双路正弦信号源,并要求可对其频率、相位、幅值进行调节,来对电能表进行校准。
基于单片机的程控信号源设计，运用数字调相、数字调幅和数字调频等技术，要求实现相位、幅度、频率的高精度程控调节。本文设计了一种利用锁相环频率合成技术和数字波形合成技术组成的程控低频正弦波信号发生器，并给出了调幅、调频、调相的实用电路，频率调节通过改变8253计数器的分频系数来实现；相位调节由51单片机预置计数器的计数初值来完成，幅度的调整通过改变DAC1210II的参考电压来实现，使频率分辨率达0.01Hz,相位调节精度达0.1°，并介绍电路中的主要芯的功能及使用。输出正弦波频率和幅值的精度高，稳定性好，失真度低，电路简单、可靠、便于程控。
关键词：数字合成信号源；程控；调幅；调频；移相；
(Abstract
Meter consumption as the size of the measurement tool is widely used in various occasions. In single-phase power meter verify system, the most basic needs of the input signal is the source of two-way high-precision sine signal source, and may request its frequency, phase, amplitude in a certain step to adjust to the imitate of the actual electricity load with a right meter calibration.
Design of the programmable signal supply controlled source，which based on the MCU，including digital phase adjustment，distal amplitude adjustment，digital frequency adjustment etc．The system should achieve high quality digital adjustment of phase, amplitude and frequency. This paper describes the use of a PLL frequency synthesizer technology, and digital wave form synthesis technology consisting of program-controlled low-frequency sine wave signal issued devices, and applies the amplitude， frequency， phase of practical circuit. Frequency can be adjusted through a change in the 8253 counter-frequ)
- 2021-04-08 20:19:00下载
- 积分：1
-
BlueBoard_schematics_V1R1-3
lpc2148_development board schematic
- 2013-04-02 14:09:14下载
- 积分：1
-
LCD1602A
基于stm32的LCD1602A液晶屏的驱动程序(Driver of LCD1602A LCD screen based on stm32)
- 2021-03-22 17:29:16下载
- 积分：1
-
public_key
In-software asymmetric public-key crypto subtype.
- 2014-08-14 01:04:47下载
- 积分：1
-
I2C_IO_simulate
使用IO口模拟I2C时序，包括主机、从机时序。(Using IO port simulation I2C timing, including the host, the machine timing.)
- 2015-09-06 16:47:35下载
- 积分：1
-
手势5
基于stm32的手势识别代码，可识别数字和石头剪刀布，内含蓝牙、语音等多种模块(Gesture recognition code based on STM32 can recognize numbers and stone scissors, including bluetooth, voice and other modules)
- 2020-06-20 22:20:01下载
- 积分：1
-
grain-dryers
我的毕业设计，基于PLC的粮食烘干机，实现了粮食的自动烘干(I graduated the design, based on the PLC of grain dryers, implements the automatic drying of food)
- 2015-03-29 21:11:52下载
- 积分：1
-
LAPORAN-4
Report about protocol data unit study communiation data
- 2015-01-01 04:19:56下载
- 积分：1
-
matlab-simulink-Inverted-Pendulum
本论文中,以一级倒立摆为研究对象,对它的起摆以及稳定控制做了研究，主要研究工作如下:
1.首先介绍了倒立摆系统的组成和控制原理,建立了一级倒立摆的数学模型,对倒立摆系统进行定性分析,但在平衡点是能控的、能观的。
2.分析了倒立摆的起摆过程,对倒立摆的起摆能量反馈控制进行分析与说明。
3.在matlab2014a的simulink库下对倒立摆构造单级倒立摆状态反馈控制系统的仿真模型和构造具有状态观测器的单级倒立摆状态反馈控制系统的仿真模型。
4.对这次仿真的总结。(In this paper, in order inverted pendulum for the study, since it swing and stability control to do the research, the main research work is as follows: 1. The first introduces the composition and control principle of inverted pendulum system, the establishment of inverted pendulum The mathematical model of inverted pendulum system for qualitative analysis, but at the equilibrium point is controllable, and can view. 2. Analysis of the inverted pendulum swing the process of inverted pendulum swing the feedback control of the energy analysis and explanation. 3. Under matlab2014a the simulink library to construct a single-stage inverted pendulum swing state feedback control system simulation model and the structure has a state observer status feedback single-stage inverted pendulum control system simulation model. 4. Summary of the simulation.)
- 2015-01-15 11:54:40下载
- 积分：1
-
24位ADS1256
基于STM32F103的程序代码，亲测有效，可以直接下载使用(The program code based on STM32F103 is valid and can be downloaded and used directly.)
- 2020-06-20 19:40:02下载
- 积分：1
