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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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jiaotongdeng2
交通灯代码,
Y22)车道黄灯
Y20车道红灯
Y23车道绿灯
(traffic lights code, Y22) Y20 lane carriageway yellow light green lane Y23)
- 2006-09-30 01:20:11下载
- 积分:1
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1
说明: 51单片机控制 套丝机机床实现自动加工螺纹钢(motor cw ccw)
- 2013-11-15 00:07:21下载
- 积分:1
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master-mater
这是一个智能电压表的实例,里面有完整的程序。这个电压表可以数字显示电压值的大小。
(This is the example of a table of a smart voltage, which has a complete program. This digital voltmeter shows the size of the voltage value.)
- 2012-12-28 15:19:53下载
- 积分:1
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CC2530-anf-GSM
有关CC2530在Ztack中实现串口与GSM之间的通信,内容简单明了(For the CC2530 Ztack achieve the communication between the serial port and GSM, the content is simple)
- 2013-09-17 14:46:40下载
- 积分:1
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BYTLCD__RTC
使用STM32的RTC,然后显示在液晶屏上。(Use the STM32 the RTC, and then displayed on the LCD screen on.)
- 2013-02-06 23:24:47下载
- 积分:1
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AT89C51
讲述了以单片机AT89C51为基础的智能电表设计程序。(Tells AT89C51 microcontroller-based smart meter design process.)
- 2014-05-18 21:25:55下载
- 积分:1
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serial
说明: 串口的发送和接受程序,板子上实验通过,和大家分享。(Send and receive serial procedures, the experiment through the board, share with you all.)
- 2009-08-15 10:03:26下载
- 积分:1
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摄像头实验
说明: 采用STM32F429单片机连接摄像头采集图像,并附源码(STM32F429 MCU is used to connect camera to collect image, and source code is attached.)
- 2020-10-12 22:37:34下载
- 积分:1
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TestingWGLCD
Another source code for LCD DISP
- 2016-04-29 20:39:06下载
- 积分:1