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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
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太原理工大学硕 士 学 位 论 文 摘 要 网络缓存(Web Caching)把经常访问的网络对象在访问开 销较少的网络节点上存一个副本,当用户再次访问这些对象
太原理工大学硕 士 学 位 论 文 摘 要 网络缓存(Web Caching)把经常访问的网络对象在访问开 销较少的网络节点上存一个副本,当用户再次访问这些对象时, 可以直接从这个开销较少的网络节点上得到满足。从而在有限 的带宽内,达到缩短用户等待时间、提高网络性能和网络可扩 展性的目的,对于提高Internet 访问效率具有重要意义。-Taiyuan University of Technology master"s degree thesis Abstract network cache (Web Caching) frequent visits to the network to visit the object of the less expensive network nodes onto a copy, when users visit these objects, directly from the overhead less network nodes to be met. Thus the limited bandwidth, which can shorten the waiting time for customers, improve network performance and network scalability for the purpose of improving the efficiency of Internet access is of vital significance.
- 2023-02-20 06:35:03下载
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从介绍功率谱的估计原理入手,分析了经典谱估计和现代谱估计两类估计方法的原理!各自特点及在Matlab中的实现方法,最后举了一个例子加以说明。...
从介绍功率谱的估计原理入手,分析了经典谱估计和现代谱估计两类估计方法的原理!各自特点及在Matlab中的实现方法,最后举了一个例子加以说明。
-Introduced the power spectrum from the estimated starting principle, analysis of classical and modern spectral estimation spectral estimation of the principle of two types of estimation methods! Their own characteristics and method of Matlab, and finally an example to illustrate this.
- 2022-11-23 01:40:03下载
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主要介绍了热电偶冷端补偿器LT1025应用,哈哈…
主要介绍热电偶冷端补偿器LT1025的应用,具有很强的使用价值-Main Introduction Thermocouple Cold Junction Compensator LT1025 applications, has a strong value
- 2022-02-01 07:04:08下载
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USB鼠标的设计。找到网上之前,我们看看
usb鼠标的设计图。以前网上找得,大家-usb mouse design. Find online before, we look at
- 2022-04-09 01:26:03下载
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完整的网站设计的毕业论文及代码,可以作为毕业论文使用,很清晰的设计...
完整的网站设计的毕业论文及代码,可以作为毕业论文使用,很清晰的设计-Complete website design and code of the thesis can be used as a thesis, it is clear the design of
- 2022-03-09 09:46:35下载
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This paper proposed the design of the car navigation terminal program, enabling...
本文中提出的车载导航终端设计方案,可实现GPS导航、电子地图实时定位、GSM/GPRS通信等功能,通过实验已取得良好的效果-This paper proposed the design of the car navigation terminal program, enabling GPS navigation, digital maps, real-time positioning, GSM/GPRS communications and other functions, the experiment has been achieved through good results.
- 2022-04-18 11:55:19下载
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学习QUARTUSII的一些体会心得,希望对初学者有帮助
学习QUARTUSII的一些体会心得,希望对初学者有帮助-QUARTUSII some experience of learning experiences, and they hope to help beginners
- 2022-04-24 22:37:45下载
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BEASOA方法论与相关产品简介由BEA系统大中华区首席SOA顾问Tiger Hsiao讲解...
BEASOA方法论与相关产品简介由BEA系统大中华区首席SOA顾问Tiger Hsiao讲解-BEASOA Introduction Methodology and related products from BEA Systems Greater China Tiger Hsiao, chief adviser to explain SOA
- 2022-06-19 11:48:26下载
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h.264中熵编码中基于上下文的算术编码的实现,此文完成了结构的设计,其较新颖。...
h.264中熵编码中基于上下文的算术编码的实现,此文完成了结构的设计,其较新颖。-h.264 entropy coding based on the context of the realization of arithmetic coding, the article completed the structural design, its more innovative.
- 2022-01-30 15:16:52下载
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