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在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测...
在电子技术中，频率是最基本的参数之一，又与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更为重要。测量频率的方法有多种,其中电子计数器测量频率具有精度高、使用方便、测量迅速，以及便于实现测量过程自动化等优点，是频率测量的重要手段之一。在本次毕业设计中我们选择使用单片机来制作数字频率计，并在实际制作中采用了直接测频法。利用延时产生的时基门控信号来控制闸门，通过在单位时间内计数器记录下的脉冲个数计算出输入信号的频率，最终送入LCD中显示。这样制作出来的频率计不仅可以满足设计题目的参数要求，而且具有了单片机的稳定性和成熟性，且控制能力强，是一种低成本，高可靠的设计方案。-In electronic technology, the frequency is one of the most basic parameters, but also with a number of electrical parameters of the measurement program, the measurement results have a very close relationship between the frequency of measurement, therefore it is even more important. Measurement of the frequency of a number of means, electronic measurement of the frequency counter with high precision, easy to use, rapid measurement, and measurement is easy to realize the advantages of process automation is an important means of measuring the frequency of one. Graduates in this design we have chosen to make use of single-chip digital frequency meter, and used in the actual production of a direct
- 2022-03-22 04:26:27下载
- 积分：1
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实现Reed_Solomon码的快速解码的原理及其算法，帮助设计ＲＳ译码的硬件实现...
实现Reed_Solomon码的快速解码的原理及其算法，帮助设计ＲＳ译码的硬件实现-Code Reed_Solomon realize fast decoding principle and algorithm, designed to help realize the hardware decoding RS
- 2022-03-14 20:53:51下载
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This paper presents a general valve control valve controller design program The...
本文介绍了一种控制普通阀门的阀门控制器的设计方案，该阀门控制器带有工业现场总线PROFIBUS－DP 的接口，可以实现阀门的远程控制和网络控制。本文主要的着力点为介绍利用PROFIBUS－DP 专用芯片SPC3 开发PROFIBUS－DP 设备中需要注意的一些问题，包括硬件接口设计，有关PROFIBUS－DP 规范标准的一些设计要点，以及利用PROFIBUS－DP 诊断功能的方法。本文对设计其它Profibus DP从站节点有很好的参考价值!-This paper presents a general valve control valve controller design program The valve controller with industrial PROFIBUS-DP interface. The valve can be achieved remote control and network control. This paper mainly focus on the use of PROFIBUS-DP SPC3 ASIC development PROFIB U.S.-DP equipment necessary to pay attention to a number of issues, including the hardware interface design, The PROFIBUS-DP standards in a number of design features, and the use PROFIBUS-DP diagnostic function method. In this paper, the design of other Profibus DP slave nodes are of value!
- 2023-06-03 14:10:03下载
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在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文...
在无线通信中使用跳频技术是军事通信中最主要的抗干扰手段之一, 而如果系统中能使用合适的中心频率可以快速跟踪跳频变化的带通滤波器将可以明显改善系统的抗干扰性能。文中从实际应用出发, 比较了几种可用于实现带通滤波器快速变频的方案, 选择了简单、实用的开关电容阵改变带通滤波器中心频率的方案-The use of frequency hopping in wireless communication technology is the most important anti-jamming in military communications, one of the means, and if the system can use the appropriate center frequency can be fast-tracked changes in frequency-hopping band-pass filter will be able to significantly improve the system anti-jamming性能. This paper from the actual application, the comparison of several band-pass filter can be used to achieve the rapid conversion of the program, choose a simple, practical switched capacitor array to change the center frequency of band-pass filter program
- 2022-10-28 01:20:03下载
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一个医院的软件需求分析，看起来很不错，对于那写说软件工程难学的人来说是一个材料！
一个医院的软件需求分析，看起来很不错，对于那写说软件工程难学的人来说是一个材料！-a hospital software needs analysis, looked good, said it was difficult to study software engineering who is a material!
- 2022-01-21 18:00:54下载
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山西电力勘测设计院业务系统需求文档，较为详细的介绍了设计院oa、工作流程，非常详细...
山西电力勘测设计院业务系统需求文档，较为详细的介绍了设计院oa、工作流程，非常详细-Shanxi Electric Power Survey and Design Institute business system requirements document, a more detailed introduction to the design institute oa, work flow, and very detailed
- 2022-08-19 23:18:16下载
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关于低密度奇偶校验码的生成，采用matlab编写，主要是校验矩阵的产生...
关于低密度奇偶校验码的生成，采用matlab编写，主要是校验矩阵的产生
-on low-density parity-check code generation, prepared using Matlab, mainly for the selection of calibration matrix
- 2022-06-28 01:50:57下载
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CH341 general usb
CH341 general usb-serial/pp interface.specification document
-CH341 general usb-serial/pp interface.specification document
- 2022-02-04 07:24:14下载
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恒丰瑞克2410开发板的电路板原理图，对做嵌入式硬件设计的朋友有一定的参考价值。...
恒丰瑞克2410开发板的电路板原理图，对做嵌入式硬件设计的朋友有一定的参考价值。-hfrk2410 development board circuit schematics, would be a good reference for those who makes hardware design for embedded system.
- 2023-07-21 00:00:03下载
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关于网络监控的几篇文章,希望对大家有所帮助
关于网络监控的几篇文章,希望对大家有所帮助-On the network monitoring of several articles, and they hope to help everyone
- 2022-04-14 20:49:32下载
- 积分：1
