Location:
Search - Wave Meter
Search list
Description: 本单片机设计的数字频率计 能够准确测量频率为1HZ-15MHZ，适用为方波，三角波及正弦波，可在人为的
用拨位开关在测量周期，频率及占空比之间转换，频率精度为1HZ，周期精度为
0．1微秒，占空比计时精度为0.1微秒。
-microcontroller design of the digital frequency meter can be accurately measured frequency 1HZ- 15MHZ. apply for the square, triangle affected sine wave can be used in artificial spaces allocated switch in measurement cycle, frequency and duty cycle to convert between the frequency accuracy of a 9999, the cycle accuracy of 0.1 microsecond, duty cycle time accuracy of 0.1 microsecond.
Platform: |
Size: 109568 |
Author: tang |
Hits:
Description: 自制方波发生器及频率计
材料:
AT89S52 + AT89C2051
1个8位共阳七段显示器
8个NPN三极管
11.0592Mhz晶振x2-Home-made square-wave generator and frequency meter material: AT89S52+ AT89C20511 a total of eight display Yang paragraph 8 NPN transistor 11.0592MHz crystal x2
Platform: |
Size: 34816 |
Author: MagicBear |
Hits:
Description: 这是马潮老师最新力做<<AVR单片机潜入式系统原理与应用实践>>中有关ADC用来实现电压表的C程序,用CVAVR编译,对想熟悉和学习AVR单片机的朋友一定有用.注释详细,一看就懂.
-This is the horse power to do the latest wave of teachers <<AVR单片机潜入式系统原理与应用实践>> relating to ADC voltage meter used for C program CVAVR compile, and learning to think with a friend AVR MCU certainly useful. Notes detail, one look to understand.
Platform: |
Size: 27648 |
Author: 吴晓 |
Hits:
Description: 低频频率计
实例目的：学习定时器、计数器、中断应用
说明：选用24MHz的晶体，主频可达2MHz。用T1产生100us的时标，T0作信号脉冲计数器。假设晶体频率没有误差，而且稳定不变（实际上可达万分之一）；被测信号是周期性矩形波（正负脉冲宽度都不能小于0.5us），频率小于1MHz，大于1Hz。要求测量时标1S，测量精度为0.1％。-Examples of low-frequency frequency meter Objective: To study timer, counter, interrupt Application Note: optional 24MHz crystal, frequency up to 2MHz. 100us generated by the T1 time scale, T0 for the signal pulse counter. Assuming there is no crystal frequency error, and stable (in fact up to one ten thousandth) the measured signal is periodic rectangular wave (positive and negative pulse width can not be less than 0.5us), the frequency of less than 1MHz, greater than 1Hz. Requested measurement time scale 1S, measurement accuracy of 0.1.
Platform: |
Size: 2048 |
Author: 王伟 |
Hits:
Description: 本文用VHDL在CPLD器件上实现一种8 b数字频率计测频系统，能够用十进制数码显示被测信号的频率，不仅能够测量正弦波、方波和三角波等信号的频率，而且还能对其他多种物理量进行测量。具有体积小、可靠性高、功耗低的特点。-In this paper, VHDL in the CPLD device to achieve a 8 b digital frequency meter measuring frequency system that used the decimal digital display of measured signals in the frequency, not only to measure sine wave, square wave and triangular wave signals such as frequency, but also to other a variety of physical measurements. Small size, high reliability, low power consumption characteristics.
Platform: |
Size: 224256 |
Author: xiaoju |
Hits:
Description: 51构成一个频率计，可以测正弦波、三角波、脉冲波周期，四位数码显示-51 constitutes a frequency meter can be measured sine wave, triangle wave, pulse wave cycle, four digital display
Platform: |
Size: 1024 |
Author: 认真就好 |
Hits:
Description: 简易数字频率计：
1、频率计的测频范围为1Hz～10KHz，被测量的信号为TTL逻辑的标准方波信号；2、为提高测量精度，采用计数法（≥1000Hz）和测周法（＜1000Hz）相结合的方法进行测量；3、显示器采用6位七段数码管，显示器的无效零应消隐。信号≥1000Hz时不显示小数点，信号＜1000Hz时显示小数，小数点后取两位。
-Simple digital frequency meter: 1, frequency of measurement frequency range of 1Hz ~ 10KHz, by measuring the signal for the TTL logic of the standard square-wave signal 2, to improve the measurement accuracy, the use of count (≥ 1000Hz) and test week law ( < 1000Hz) the combination of measurement methods 3, paragraph 6 displays the use of digital pipes, zero should be null and void display blanking. ≥ 1000Hz signal does not show the decimal point, the signal < 1000Hz display decimal, decimal take two.
Platform: |
Size: 3072 |
Author: zhy |
Hits:
Description: 设计并制作一台数字显示的简易频率计。
（二）要求
1.基本要求
(1)频率测量
a.测量范围 信号：方波、正弦波
幅度：0.5V～5V[注]
频率：1Hz～1MHz
b.测试误差≤0.1
(2)周期测量
a.测量范围 信号：方波、正弦波
幅度：0.5V～5V[注]
频率：1Hz～1MHz
b.测试误差≤0.1
键盘从上到下，从左到有依次为： 1 2 3 4
5 6 7 8
9 0 . 确认-Design and production of a simple digital frequency meter display. (B) 1. The basic requirements of (1) a. measuring range frequency measurement signal: square wave, sine wave range: 0.5V ~ 5V [Note] frequency: 1Hz ~ 1MHz b. test error of ≤ 0.1 (2) cycle measurement a. measuring range signal: square wave, sine wave range: 0.5V ~ 5V [Note] frequency: 1Hz ~ 1MHz b. Error ≤ 0.1 Test the keyboard from top to bottom, left to have followed: 1 2 3 4 5 67,890. confirm
Platform: |
Size: 337920 |
Author: wangqiang |
Hits:
Description: 能够产生正弦波、方波、三角波。同时还可以作为频率计测频率。函数信号的产生由MAX038和外围电路完成，能产生1Hz—20MHz的波形。波形选择由单片机完成。输出或输入频率经74HC390分频后，由单片机完成自动频率检测显示-Capable of producing sine, square, triangle wave. At the same time can also be measured as a frequency meter frequency. Function signal generated by the MAX038 and the completion of the external circuit to generate the waveform 1Hz-20MHz. Completed by the single-chip waveform selection. Output or input frequency by the frequency 74HC390 after completion by the single-chip automatic frequency detection show
Platform: |
Size: 93184 |
Author: hx |
Hits:
Description: AD使用技巧及AD0832的应用包括制作数字电压表，产生锯齿波等-AD using skill and AD0832 applications including the production of digital voltage meter, resulting in sawtooth wave, etc.
Platform: |
Size: 459776 |
Author: yanhe |
Hits:
Description: 该出租车计价器课程设计由：光信息采集电路模块、方波信号产生模块、单片机及其外围电路模块、键盘模块、显示模块四部分组成。设计利用方波信号发生器产生方波模拟采集的光电信号，经过单片机的控制与LED数码管显示模块的作用显示价钱和里程数。-The taxi meter course design by: optical information acquisition circuit module, square-wave signal generator module, microcontroller and its peripheral circuit module, the keyboard module, display module composed of four parts. Square-wave signal generator designed to generate square wave using analog optical signal collected through MCU control and LED digital tube display module displays the role of price and mileage.
Platform: |
Size: 120832 |
Author: 罗杰 |
Hits:
Description: 今天的微控制器速度已经可以通过软件轻而易举地实现这一切。而且更妙的是电压表和电流表成了免
费的副产品。微控制器的控制环无论如何都必须知道电压和电流值。你刚好也要显示它。我们要从微控制
器得到的是：一个在所有时间都用来测量电压和电流的A/D 转换器；一个根据命令为功率三极管提供基准
电压的D/A 转换器。问题是那个D/A 转换器的速度要非常快。如果在输出端检测到了短路，那么我们必
须立即减小三极管B 极上的电压，否则这个三极管就会损坏。“快速”意味着要达到毫秒级，如同运算放
大器一样。Atmega8 的A/D 转换器已经足够快了，但显然它没有D/A 转换器。使用脉宽调制和模拟低通滤
波器是可以得到一个D/A 转换器的，但是这样速度太慢了，无法通过软件立即实现短路保护。-The speed of today s micro-controller has been easily achieved through software, all that. And even more interesting is the voltage meter and ammeter become free
Charge by-product. Micro-controller control loop in any case have to be aware of voltage and current values. You have to show that it happened. We must microcontroller
Device get is: 1 at all times be used to measure voltage and current of the A/D converter one under the command and provide the basis for the power transistor
Voltage of D/A converter. The problem is that D/A converter to be very fast speed. If the output short circuit is detected, then we must
Shall immediately reduce the voltage on the transistor B pole, otherwise the transistor will be damaged. "Fast" means to achieve milliseconds, as the operator put
Like Da-qi. Atmega8 of the A/D converter has been fast enough, but apparently it does not D/A converter. The use of pulse-width modulation and analog low-pass filter
Wave device be able to get a D/A
Platform: |
Size: 584704 |
Author: xiexie |
Hits:
Description: 数字频率计是计算机、通讯设备、音频视频等科研生产领域不可缺少的测量仪器。它是一种用十进制数字显示被测信号频率的数字测量仪器。它的基本功能是测量正弦信号，方波信号及其他各种单位时间内变化的物理量。在进行模拟、数字电路的设计、安装、调试过程中，由于其使用十进制数显示，测量迅速，精确度高，显示直观，经常要用到频率计。-Digital frequency meter is the computer, communications equipment, audio, video and other areas of scientific research and production of measuring instruments are indispensable. It is a decimal figures show the number of the measured signal frequency measuring instruments. Its basic function is to measure the sinusoidal signal, square wave signals and other physical changes in unit time. During simulation, digital circuit design, installation, commissioning process, because of its use decimal numbers show that rapid measurement, high precision, intuitive display, often use the frequency counter
Platform: |
Size: 226304 |
Author: 章强 |
Hits:
Description: 【摘要】本设计是基于AT89C2051单片机的软硬件系统设计，硬件电路包括信号预处理电路、波形转换电路、波形整形及分频电路、显示电路，它们在本文中都有详细介绍。在单片机设计中应用单片机的数字运算和控制功能实现了测频量程的自动切换，满足了时间要求和精度要求。
【关键词】频率计；分频；AT89C2051 -【Abstract】This paper presents a design for frequency meter based on AT89C2051 Single-Chip Microcomputer. Several circuits such as signal pretreatment circuit, wave form changing circuit, wave shaping and frequency dividing circuit and display circuit are detailly discussed . Software and hardware system design are needed too. It not only realizes the measuring range automatic switching,but also satisfys the time request and the accuracy requirement by using figure arithmetic and control function of Single-Chip Microcomputer.
【Keywords】Frequency Meter Frequency Division AT89C2051
Platform: |
Size: 641024 |
Author: 张谦 |
Hits:
Description: 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
Platform: |
Size: 381952 |
Author: 张谦 |
Hits:
Description: 设计一个简易等精度频率计 信号：方波 频率：1Hz~1MHz-Design a simple and other precision frequency meter signal: square wave frequency: 1Hz ~ 1MHz
Platform: |
Size: 1018880 |
Author: 方大牙 |
Hits:
Description: 在本设计中，时钟信号通过分频计产生一个理想的目标时钟频率，控制地址发生器计数，地址发生器的计数结果输出给正弦波数据存数ROM，作为其地址，从该地址取出ROM里的存储好的数据，再通过DA转换，将数字信号转换成模拟信号，最后输出给示波器观察。-In this design, the clock signal generated by frequency meter an ideal target clock frequency, the control address generator counts, count result output address generator to keep the number of sine wave data in ROM, as its address, remove the ROM from the address where good data storage, and then through the DA converter, the digital signal into an analog signal, the final output to the oscilloscope.
Platform: |
Size: 2502656 |
Author: 刘睿阳 |
Hits:
Description: 数字频率计可以实现0.1---50khz的频率测试，小于1000时采用测周法，大于1000时自动转为计数法，最大误差小于千分之一，基本保持在万分之一之内。试验板采用12Mhz晶振，74164静态数码管显示，CD4051信号调理输入TTL方波信号。-Digital frequency meter can achieve 0.1--- 50khz frequency of testing, measuring less than 1000 weeks of method used, more than 1000 automatically to count, the maximum error is less than one thousandth, keeping within one ten thousandth . Test board with 12Mhz crystal, 74,164 static digital display, CD4051 signal conditioning input TTL square wave signal.
Platform: |
Size: 6144 |
Author: lxl |
Hits:
Description: 这是我的毕业可用8位的LED显示，有小数点的。设计哦，可以用的。可供参考-VHDL-based digital frequency meter With the rapid development of electronic technology, FPGA/CPLD appear in its high-speed, high reliability, series parallel mode of outstanding merit widely used in the electronic design, and EDA design represents the future direction. In this paper, based on the principle of equal precision frequency meter measuring frequency is a typical application. Through the FPGA using VHDL hardware description programming language, in addition to the plastic part of the measured signal, key input part and the digital display part, the rest all in one FPGA chip implementation, such as 8-bit digital precision frequency meter. Using Quartusll integrated development environment for editing, synthesis, wave simulation, and download to the FPGA, by the actual circuit testing. And other precision frequency meter has high availability and reliability, high precision, and accuracy varies with frequency. System frequency measurement range of up to 0-25MHz, the frequency m
Platform: |
Size: 4354048 |
Author: 战魔 |
Hits:
Description: 单片机M16+LCD数字频率计，/* 目标MCU:MEGA16 晶振:外部8MHZ */
/*基于LCD的频率计，PC0~PC2对E,RS,RW
PORTA接DATA的8根线
用PB0口产生5000HZ方波，并二的N次分频
给ICP1输入补捕捉，既练习TC中断又有ICP-SCM M16+ LCD digital frequency meter, /* Target MCU: MEGA16 Crystal: External 8MHZ*//* frequency count based on LCD, PC0 ~ PC2 on the E, RS, RW PORTA then the eight lines with DATA ports PB0 have 5000HZ square wave, and two of N times the input frequency to the ICP1 make capture, not only interrupt another ICP exercises TC
Platform: |
Size: 4096 |
Author: wei |
Hits: