Description: ADS下开发的ARM LPC2124使用ADC模块的通道0、1进行电压的测量，然后将转换结果从串口输出的程序，包括PROTEUS仿真电路-ADS developed under the ARM LPC2124 using 0,1-channel ADC module for voltage measurement, and then the results will be converted from the serial output of procedures, including PROTEUS simulation circuit Platform: |
Size: 115712 |
Author:龚剑 |
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Description: 基于89S52单片机的一种电压测量电路,该电路采用ICL7135高精度、双积分A/D转换电路，测量范围直流0-±2000伏，使用LCD液晶模块显示，可以与PC机进行串行通信-89S52-based single-chip a voltage measurement circuit, the circuit ICL7135 precision, double-integrating A/D conversion circuit, measuring range DC 0- ± 2000 V, the use of LCD liquid crystal display module can be conducted with the PC serial communication Platform: |
Size: 2048 |
Author:江南 |
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Description: 本系统分电压测量和信号产生输出两大部分，电压测量部分以模拟电路为主，配合放大模块、A/D转化模块、显示模块；通过凌阳单片机进行数据处理，在误差允许范围内显示测量电压值。信号产生以直接数字式频率合成器(Direct Digital Frequency Synthesis,简称DDS或DDFS)为核心，经过AT89S52对DDS芯片内部进行控制，使之输出标准正弦波形，利用编程实现频率预置、步进，达到电压输出频率的可调节步进。通过调试与测量完成了题目的基本部分和全部发挥部分的要求并有自己的创新-This system consists of the parts of the voltage measurement and the signal generation output. The voltage measurement mainly focuses on analog electric circuit, with using amplifier module, A/D conversion module and displaying module. In the certain range where errors are allowed to deal with data through SPCE061A microcontroller, the signal generation regards direct Digital Frequency, or DDS/DDFS as the centre, which is controlled by AT89S52 to output sine waveform. Then it can set up frequency and step to adjust the step of voltage output frequency. Through to debugging and measure the system performs the basic and expanding demands .we have some addition innovation.
Keywords：SPCE061A ，AT89S52 ，millivoltmeter , DDS
Platform: |
Size: 589824 |
Author:杨隆 |
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Description: 本设计的主要内容是用单片机系统进行温度实时采集与控制。温度信号由AD590K和温度／电压转换电路提供，对AD590K进行了精度优于正负0.1°C的非线性补偿，温度实时控制采用分段非线性和积分分离PI算法，其分段点是设定温度的函数。控制输出来用脉冲移相触发可控硅来调节加热丝有效功率。系统具备较高的测量精度和控制精度-The main content of this design is to use real-time microcontroller system acquisition and control the temperature. Temperature signal from the AD590K and temperature/voltage conversion circuit provided on the AD590K was plus or minus 0.1 ° C accuracy of better than non-linear compensation, the temperature real-time control and integration with sub-linear algorithm for separation of PI and its sub-point is Set a function of temperature. Control output to trigger a pulse thyristor phase-shift effective power to regulate the heating wire. The system has a higher measurement precision and control accuracy Platform: |
Size: 355328 |
Author:wang |
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Description: 这是一个多用途的测量电路，可以用于测量电阻，测量电流，测量电压～-This is a multi-purpose measurement circuit can be used to measure resistance, measuring current, measuring voltage ~ Platform: |
Size: 73728 |
Author:Alexander |
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Description: 使用ICL7129测量uV电压:实实在在的高精度:分辨力达10uV,包括分辨力,高精度应用 讨论,具体电路,液晶屏幕逻辑表格...提供给爱好高精度测量电压的朋友们参考.-UV voltage measurement using the ICL7129: real accuracy: resolution of 10uV, including resolution, high-precision application discussions, the specific circuit, the logical form ... LCD screen provides accurate measurement of voltage-loving friends as a reference. Platform: |
Size: 259072 |
Author:蓝天 |
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Description: 前置测温调理电路，通过比较器比较测温电路中的电压，来调理电路中的参数-Pre-conditioning circuit temperature, through the comparator compares the voltage of temperature measurement circuit to circuit parameters of conditioning Platform: |
Size: 362496 |
Author: |
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Description: 本报告介绍了基于AT89S52单片机为核心的、以AD0809数模转换芯片采样、以1602液晶屏显示的具有电压测量功能的具有一定精度的数字电压表。在实现基础功能要求之上扩展了串口通讯、时钟功能、高压报警、短路测试、电阻测量、交流电压峰峰值和周期测试等功能，使系统达到了良好的设计效果和要求。-This report describes the AT89S52 microcontroller based on the core to AD0809 DAC chip sampling to the LCD screen display 1602 voltage measurement function with a certain precision digital voltmeter. On the basis of functional requirements in the realization of extension of the serial communication, clock function, high-pressure alarm, short-circuit test, resistance measurement, AC voltage peak and the cycle of testing and other functions, allowing the system to achieve a good design effects and requirements. Platform: |
Size: 158720 |
Author:jandh |
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Description: 使用 SN8P1702A 的低成本上下限通用数字表头
图示电路是一款输入电压 DC200mV ,满度读数 2000 个字的数字电压表头电路.分辨力达到 100uV/字 .这种参数与通常使用的 3 位半数字表头相吻合,(但是这里没有负电压信号的测量功能).因此,可以方便地在无需负信号输入的场合替换原来的数字表头.
替换带来的好处是这里具有上下限设置的控制功能,而普通的 3 位半数字表头却只能测量显示而不能进行设置控制.
配原理图应用和连接说明:
图A:测量和控制直流 200mA 信号.如果是交流信号,需要先有 AC-DC 转换.
图B:测量和控制直流 200mV 信号.如果是交流信号,需要先有 AC-DC 转换
图C:测量和控制直流 4～20mA 信号.这种信号可以远传,例如压力传感器的输出.输入配置的 -50mV 电压是在输入 4mA 的时候,恰好抵消取样电阻上的压降而设.实际中需要使用低内阻的恒压源.
图D:测量和控制温度测量信号.LM35D 具有 10mV/℃ 的输出,因此,通过 10:1 的分压,达到 1mV/℃,100℃ 就是 100mV,100mV 就显示 1000 个字,把小数点定位在十位上,就是 100.0℃
附有 AD 转换部分的源程序-Use SN8P1702A low-cost universal digital meter on the lower
Icon is a circuit input voltage DC200mV, full-scale reading of 2000 characters digital voltage meter circuit. Resolution to 100uV/word. This argument often used three and a half number of the header match, (but there is no negative voltage signal measurement function). Thus, it can easily without a negative signal input the number of occasions replace the original header.
The benefits are here to replace a set of control functions on the lower limit, while the ordinary three half-meter can only measure the number of display and control can not be set.
Schematic connection with the application and instructions:
Figure A: 200mA DC measurement and control signals. If the AC signal, you need to have AC-DC conversion.
Figure B: 200mV dc measurement and control signals. If the AC signal, you need to have AC-DC converter
Figure C: measurement and control of DC 4 ~ 20mA signal. This signal can be remote, such as pressure s Platform: |
Size: 163840 |
Author:蓝天 |
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Description: 用热电阻Pt100做温度传感器，采用惠斯登电桥测量电路，将随温度变化的热电阻变化量转换成模拟电压信号；用LM324设计放大电路；以12位串行模数转换器ADS7816将模拟电压信号转换成为数字信号；单片机将采集到的数字信号经过平滑处理、变换成温度量用数码管显示出来。-To do with hot 电阻 Pt100 temperature sensor, the use of Wheatstone bridge measurement circuit, the temperature dependent change of resistance of the heat converted to analog voltage signal with the LM324 amplifier circuit design to the ADS7816 12-bit serial ADC analog voltage signal into a digital signal single chip digital signal will be collected through the smoothing amount converted into a digital temperature control display. Platform: |
Size: 2048 |
Author:张庆峰 |
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Description: 推荐一份"555 集成电路用于测量电压的电路",摘录了 555 电路进行高精度低成本测量电压的单元电路.主要通过 VCO(压控振荡器) 和 VFC (电压频率转换器)方法-555 is a cheap and widely used circuit, where a special extract of 555 by VCO (voltage controlled oscillator) and VFC (voltage-frequency converter) for low-cost high-precision measurement of the voltage circuit unit 555 for-----" measuring the voltage of the circuit " in the voltage measurement method, the corresponding output voltage signal to the input frequency, for reference! Platform: |
Size: 2952192 |
Author:蓝天 |
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Description: 8路输入模拟信号数值显示巡检数字电压表可以测量0--5V的8路输入 模拟信号电压值，并在4位LED数码管上轮流显示或单路选择显示。
按系统功能实现要求，决定控制系统采用AT89C52单片机，A/D转换采用ADC0809。系统除能确保实现要求的功能外，还可以方便地进行8路其他A/D转换量的测量、远程测量结果传送等扩展功能。
采集 8 个通道的模拟量在数码管显示出来。模拟量值的测量范围是0-255,第2个数码管用于显示哪一个通道，后2个数码管用于显示采集的模拟量的值，每秒钟显示切换一下通道。
本设计还有通道选择的功能．有两个按键,一个是调节轮流显示和选择通道两种功能的转换，另一个是选择通道的切换。要注意的地方：
1、只有当轮流显示的通道快显示到通道8后，长按住功能转换键等出现数码管全熄灭后再放开，就会转到选择通道的功能。
2、切换通道时，也要长按一会，等出现数码管全熄灭后再放开。-8 road input analog signals that digital voltmeter measurement circuit can 0-5 V 8 road input analog signals voltage value, and in the four LED digital display or taking turns on the single option to show.
According to the system functions requirements, decided to control system adopts AT89C52 single chip microcomputer, A/D conversion using ADC0809. The system can ensure the request except functions, but also can be convenient to 8 way other A/D conversion amount of measurement, remote measurement results delivery etc function expansion.
8 channel simulation collection of digital tube in the display. Simulation of the value of measurement range is 0-255, second digital tube is used to show which channel, 2 digital tube used to show the simulation of the value of the collection of every second. The channel that switch.
This design and channel selection function. There are two key, is a regulation that choose channels and in turn two function conversion, the other is a choice Platform: |
Size: 58368 |
Author:楚明岩 |
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Description: 数字电压表的源程序，可以实现实现测量电路的电压，精确到小数点后面三位数字。附带数字电压表的流程图-Digital voltage meter source, can be implemented to realize the voltage measurement circuit, down to the decimal point three digits.Attached flowchart of digital voltmeter Platform: |
Size: 20480 |
Author:林风 |
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Description: 大气湿度的测量--由HS1101构成的湿度检测电路图3． 测量电路输出的模拟电压通过U18 接口转化为数字信号输入PC机，这一AD 转换功能由U18 硬件平台提供，U18软件内的U18 软件功能模块实现硬件接口的驱动和通信及信号处理等基本功能的实现。
4． 如图所示，当大气湿度变大时，HS1101两端的电容变小，利用TLC555产生的震荡频率变大，在TP4端可观察。
5． 经过数据采集和软件处理，最终形成与湿度变化大小成一定关系的的线性频率。
-Measuring atmospheric humidity- humidity detection circuit constituted by the HS1101 3. The output analog voltage measurement circuit U18 via the interface into a digital signal input PC, the AD conversion function is provided by the hardware platform U18, U18 U18 software modules within the software driving the basic functions and the signal processing and communications hardware interface of achieved. 4. As shown, when the atmospheric humidity increases, the capacitance across the small HS1101 using TLC555 oscillation frequency becomes large, the terminal can be observed TP4. 5. After data acquisition and processing software, eventually forming into a certain size with humidity changes the relationship between linear frequency. Platform: |
Size: 19456 |
Author:wenzhong |
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