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Description: 单片机无线数据传输接口C程序设计
介绍一种抗干扰能力强的单片机无线数据传输接口的工作原理与软件设计。主控芯片采用AT89C51单片机,信方式采用抗干扰能力强、可靠性高的DTMF信号和单工调频的无线通信方式。十六DTMF信号码作为信息帧的十种位码,以及采用校验码进行检错和纠错,数据传输误码率几乎降到为零,极大地提高了无线数据传输质量。软件采C51模块化设计,可方便地进行移植以实现各种数据的区域无线传输。本接口可应用于实验室大型仪器设备的无线通自动登记和管理系统,也可应用于无线通信动抄表系统等。
-Single-chip wireless data transmission interface C Programming
A strong anti-interference ability of the single-chip wireless data transmission interface and software design principle. AT89C51 single-chip microcomputer control chip, the letter means the use of anti-interference ability, high reliability and the DTMF signal and FM simplex radio communication. Letter No. 16 as the DTMF information of the ten-bit code frame, as well as the use of checksum error code and error correction, so that data transmission error rate dropped to almost zero, has greatly improved the quality of wireless data transmission. C51 mining modular software design, can be easily transplanted to the region to achieve a variety of wireless data transmission. The interface can be applied to large-scale laboratory equipment wireless Automatic registration and management system, also can be applied to wireless communications, such as automatic meter reading system.
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Size: 48128 |
Author: 王成 |
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Description: 流速仪软件。可以测量河道流速，需要配合流速仪使用。有效的使用在水利行业。-Software flow. River flow can be measured, the use of the need to meet the current meter. Effective use of the water industry.
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Size: 132096 |
Author: chenxj |
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Description: ADC数字电压表，用仿真软件仿真，具有高精度的数字电压表。-ADC digital voltage meter, using simulation software simulation with high-precision digital voltmeter.
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Size: 229376 |
Author: JIN |
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Description: 数字频率计详解，从设计思路，设计方案的比较到软件编程框图，极尽详细。-Detailed digital frequency meter, from design ideas, design diagram compared to software programming, highly detailed.
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Size: 337920 |
Author: |
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Description: 2007年G题 积分型直流数字电压表设计
里面包含电路图，源程序，真正不用费力去寻找原理图。本设计为16位高分辨率的三斜积分式直流数字电压表, A/D转换器部分采用普通元器件构成模拟部分，利用MEGA8单片机借助软件实现数字计数显示功能，同时采用MEGA8单片机编程实现直流电压表量程。
-G points title in 2007 DC Digital Voltmeter design containing schematics, source code, not easy to find the real schematic. The design for the 16-bit high-resolution integral triclinic DC digital voltage meter, A/D converter part of the ordinary analog components constitute part of the software through the use of single-chip MEGA8 count digital display, at the same time using a single MEGA8 Machine Programming DC voltage meter range.
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Size: 110592 |
Author: 李利伟 |
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Description: 本系统采用双积分电路将对直流电压的直接测量，利用模拟开关实现对量程的无触点切换。A/D转换器部分采用普通元器件构成模拟部分，利用AT89S52单片机借助软件实现数字计数显示功能，同时采用AT89S52单片机编程实现直流电压表量程的自动转换、自动校零、和液晶显示等功能。-The system will be dual-integral circuit of the direct measurement of DC voltage, using analog switches to achieve non-contact switch on the range. A/D converter using common components constitute part of the analog part, using AT89S52 microcontroller with software, digital counting display while using AT89S52 microcontroller programmed DC voltage meter range automatic conversion, automatic zero, and the liquid crystal display.
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Size: 188416 |
Author: 海峰 |
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Description: An "improved" inductance / capacitance meter
Actually, it works much the same as the originalIt differs from the original in that:
A 16F628 PIC is used. This has internal comparator, which means the LM311 is no longer needed.Software calibration is used. The finished meter can be calibrated against "any" accurate capacitor within the range 100pF to about 10000pF
-An "improved" inductance/capacitance meter
Actually, it works much the same as the originalIt differs from the original in that:
A 16F628 PIC is used. This has internal comparator, which means the LM311 is no longer needed.Software calibration is used. The finished meter can be calibrated against "any" accurate capacitor within the range 100pF to about 10000pF
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Size: 23552 |
Author: Martin Silisque |
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Description: 自行设计的计米器软件，该软件可实现预报警功能，正计数、倒计数等功能，并可断电自动保存数据，来电后自动加载断电前的状态。-Meter self-designed software, the software enables the pre-alarm function, is counting, down counting functions, and can power off automatically save the data calls automatically load the power off before the state.
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Size: 6144 |
Author: sgx |
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Description: USB电压表的应用: USB接口硬件 和 VC开发的上位机软件,组成监控界面-USB voltage meter applications: USB interface, hardware and VC software developed by the upper plane to form a monitoring interface
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Size: 335872 |
Author: guoj |
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Description: 用软件的方法实现对步进电机仪表的控制-A software solution used to achieve the control of stepper motor meter. . . . . . . . . . . . .
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Size: 377856 |
Author: 王恩 |
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Description: 电力抄表规约dl/t645调试软件，有助于开发645抄表程序-Electricity meter reading of the Statute dl/t645 debugging software, helps to develop 645 meter-reading program
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Size: 840704 |
Author: 卢锐 |
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Description: 用VS2003写的一个仪表显示,对做上位机监控软件有些借鉴意义.-Written in a meter with VS2003 shows that monitoring software on the host computer to do some learn.
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Size: 546816 |
Author: 周辉 |
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Description: 计模式：可复用面向对象软件的基础 以及 源码-Meter mode: Elements of Reusable Object-Oriented Software foundation and source code
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Size: 1254400 |
Author: tenzo |
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Description: 涡街流量计数字信号处理系统的改进与实验
本文针对涡街流量计数字信号处理系统存在的不能测量小流量和易受电磁干扰的问题,对其软硬件方面进行了
改进。重新设计和研制了电荷放大器,提高了灵敏度,增强了适配能力。采取了合理的接地和屏蔽措施,提高了系统的抗干
扰能力。采用去均值和频谱校正的方法,改善了系统的测量精度。编制键盘监控软件,采用状态变量法设计键值分析程序,
实现人机对话功能。进行了液体流量和气体流量的标定实验,结果表明,改进后的数字信号处理系统比常规的流量计信号处
理系统的测量精度高、流程比宽和适配能力强。-Vortex Flowmeter digital signal processing system improvements and experimental
In this paper, vortex flowmeter digital signal processing systems can not exist in measuring small flows and vulnerable to electromagnetic interference problems, its hardware and software aspects of the
Improvement. To re-design and development of the charge amplifier, increasing sensitivity and enhanced adaptive capacity. Adopted a reasonable grounding and shielding measures to improve the system s anti-stem
Interference capability. Used to mean and spectral correction methods to improve the system s measurement accuracy. The preparation of keyboard monitoring software, using state-variable method designed to key analytical procedures,
Functions to achieve human-machine dialogue. Were liquid flow and gas flow calibration experiments, the results show that the improved digital signal processing systems than the conventional flow meter signal at
Management System s high accuracy, process than the w
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Size: 218112 |
Author: 别问 |
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Description: 本文提出了一种智能仪
表零点和满度自动校正的方法 ,给出了零点和满度校正的电路和软件框图 ,现该方法已经应用于实际中 ,并取得了良好的效
果。-In this paper, an intelligent meter zero and full-scale auto-calibration method gives zero and full-scale calibration of the circuit and software block diagram is that the method has been applied to the real world, and has achieved good results.
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Size: 135168 |
Author: 王明 |
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Description: 积分式直流数字电压表的设计
摘要:介绍了一种基于单片机的积分式直流数字电压表的硬件实现和软件设计方法.此数字电压表采
用自动校零型双积分A/D转换器的原理,利用单片机来控制A/D转换,测试结果表明:该电压表测量误差小,
工作稳定,还具备自动量程转换功能
-Integral DC digital voltmeter design Abstract: This paper introduces a microcomputer-based integral-type DC digital voltage meter hardware implementation and software design method. This digital voltmeter with automatic zero-type double-integrating A/D converter principle, single-chip computer to control the A/D conversion, test results show that: The voltage meter measurement error is small, job stability, but also with automatic range conversion
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Size: 95232 |
Author: ghdsh |
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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
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Size: 584704 |
Author: xiexie |
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Description: *芯片组合为PIC16F690-I/SS + CC1100 (434Mhz)，
*专为目前传统RS485电表设计,可不修改表的软件方式直接将RS485表升级成无
线且具有路由的表
*结合目前高效稳定的无线传输芯片TI CC1100.
*拥有接近于透明串口传输(内置最大缓冲区32 bytes).
*支持一对一,一对多传输
*软件在线目的地址切换
*软件在线信道频率切换
*支持信道侦听功能,降低数据冲撞机会.
*支持数据确认功能,提升数据传送的稳定度.
*支持四个独立输入/出点 (TTL-Level)
*超小尺寸 : 30.00mmX23.5mm(不包括天线)
*低成本天线 ,采用弹簧天线
*输出频率 : 433.92Mhz (标准品)
*输出功率 : +10dBm
*接收感度 : -108dBm-* Chip combination PIC16F690-I/SS+ CC1100 (434Mhz),
* RS485 meter for the current traditional design of the table from time to modify the way the software upgrade directly to the table without RS485
Line and has a routing table
* Combined with the current stable and efficient wireless transmission chip TI CC1100.
* Has a close and transparent serial transmission (built-in maximum buffer 32 bytes).
* Support for one to one, one to many transmission
* Destination Address switch software online
* Software online channel frequency switching
* Support the channel listener function, reduce the chance of data collision.
* Support data confirm but also to enhance data transmission reliability.
* Support 4 independent input/output (TTL-Level)
* Ultra small size: 30.00mmX23.5mm (not including antenna)
* Low-cost antennas, antenna with spring
* Output frequency: 433.92Mhz (standard)
* Output power:+10 dBm
* Receive sensitivity:-108dBm
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Size: 183296 |
Author: Henry |
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Description: 双光柱数显表，应用芯片51系列单片机，应用开发为keil软件开发。-Double column digital display meter, application of chip 51 computers, applications development for the keil software development.
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Size: 2048 |
Author: 邹德佳 |
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Description:
该系统利用VHDL语言、PLD设计出租车计费系统，以MAX+PLUSⅡ软件作为开发平台，设计了出租车计费器系统程序并进行了程序仿真。使其实现计费以及预置和模拟汽车启动、停止、暂停等功能，并动态扫描显示车费数目
-In this system, VHDL language, PLD design taxi billing system to MAX+ PLUS Ⅱ software as a development platform to design a taxi meter system simulation program and conducted the program. To achieve automotive billing and pre-and simulation start, stop, pause function, and dynamic scan showed the number of fare
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Size: 178176 |
Author: xing |
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