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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
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485proteus
51单片机485通信的源代码，C++环境下使用。Proteus仿真软件包，您可以使用程序。(The 51 single chip microcomputer 485 communication source code, the use of C++ environment. Proteus simulation package, you can use the Program.)
- 2014-12-09 09:16:21下载
- 积分：1
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LCD
STM32F407单片机使用FSMC驱动ILI9488液晶屏(STM32F407 MCU uses FSMC to drive ILI9488 LCD screen)
- 2020-07-30 09:08:38下载
- 积分：1
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xunhuanma
简明的循环码C++编译程序，有二种编码方案可以采取(Condensed a cyclic code C++ compiler, there are two kinds of coding schemes can be taken)
- 2013-03-04 19:18:23下载
- 积分：1
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1_queue
stm32f103zet6 使用freertos，在IAR平台下开发，队列例程(stm32f103zet6 freertos)
- 2020-06-16 20:00:02下载
- 积分：1
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src
stm32f103rct6 boot程序 用串口升级 用modbus协议升级
- 2015-10-25 19:16:20下载
- 积分：1
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LPC2368--ARM
LPC2300系列ARM以太网接口的应用.PDF(LPC2300 family of ARM Ethernet interface applications. PDF)
- 2011-07-18 15:15:58下载
- 积分：1
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SPWM_Demo_Lcd1602_ATmega8515
一个用AVR单片机ATmega8515输出SPWM波形并驱动一个LED渐亮渐灭的示范程序，输出波形的占空比和频率显示在1602液晶屏上，编译环境Code Vision AVR(AVR with a ATmega8515 SPWM output waveform and an LED driver gradually Liang gradually eliminate the program, the duty cycle output waveform and frequency displayed on the LCD screen 1602, Build Environment Code Vision AVR)
- 2006-10-26 11:22:32下载
- 积分：1
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SANUPS_PMC_J
附件为小日本的50KW逆变器的方案，太阳能控制架构图，希望对大家有用。附件为小日本的50KW逆变器的方案，太阳能控制架构图，希望对大家有用。(Attached is a small Japanese 50KW inverter solutions, solar control chart, we want to be useful. Attached is a small Japanese 50KW inverter solutions, solar control chart, we want to be useful.)
- 2013-12-11 16:30:48下载
- 积分：1
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Access-Control
名称：门禁模拟
模拟现实中门禁系统，可以输入密码进入也可以呼叫住户，再由住户按下开门按键
实现改密码功能，密码保存在24c02中能保证掉电不丢失密码。八个LED灯分别代表
8家住户，其中开门按键为共用，还带有忘记密码恢复按钮，模拟恢复出厂设置，
显示部分为LCD1602。程序共分为3种模式，分别为 等待输入 密码修改 呼叫住户
3种模式，其中等待输入是主要状态，所以在进入密码修改 呼叫住户模式后如果
长时间没有操作能自己切换到等待输入模式。(Name: Access Analog
Simulating real access control system, you can also enter a password to enter the call households, again by pressing the open button households
Implement change password function, the password stored in the 24c02 can guarantee non-volatile password. Eight LED lights represent
8 households, which opened the door keys are shared, but also with forgotten password recovery button, analog restore factory settings,
Display part LCD1602. Program is divided into three modes, namely, waiting for a password to modify call households
3 modes, which is the main input wait state, so call households entering the password change mode if
Their long time operation can be switched to the standby input mode.)
- 2013-07-02 21:02:33下载
- 积分：1
