无线键盘现场测试系统的构建与研制
发布时间：2018-11-04 13:21
【摘要】：近年来，随着无线通信技术的飞速发展，无线键盘产品迅速推出和更新，需求量越来越大。为了保证其质量，必须制造出合适的量产测试系统。常规的现场测试系统测试模板由分立元件构成的，其高频一致可控性差，而导致测试不确定性增加；同时平面布置的测试模板会对外产生干扰，而引起的测试空间占用过大的问题。本文主要针对上述两个问题，设计了有特色的无线键盘现场测试系统。 该系统中测试模板中采用了自主设计的三端口衰减器，该衰减器在利用耦合器作衰减器的基础上巧妙地利用PCB的损耗特性，使多余的信号能量在板间消耗，既克服了由集中参数搭建的衰减器的器件高频一致性的问题，又减少了对空中的辐射，有效地减少了测试系统之间的信号干扰，节省了测试空间。本文还设计了有利于减少干扰的天线单元，得到了一套测试系统。该系统包括衰减单元、电路单元以及天线单元三个部分。文中详细给出了各部分的设计原理和设计过程，最后将设计结果制作出相应的实物样品进行测试。实测结果表明：该系统可以实现现场测试功能，具有良好的一致性和稳定性，并可保证测试系统之间干扰减少，提高了空间利用率。本文的工作为无线键盘现场测试系统的设计改造提供了帮助。本文分为五个部分。 首先，阐述了无线键盘现场测试系统的研究现状，，介绍了设计中用到的电磁仿真软件。并提出无线键盘现场测试系统的整体构建的方法。 其次，分析并研究了应用于无线键盘现场测试系统的三端口衰减器设计。应用耦合器的工作原理，设计了在工作频段内，微带线和带状线两类衰减量约30dB的衰减器。制作这几款衰减器的实物并进行测量，对设计进行了验证。其中一款巧妙利用PCB基材的损耗，省去了负载电阻，有效地减小了辐射干扰。 然后，对系统中用于收发信号的天线进行了设计，本文设计了单极子和八木两款简单的印刷天线，设计简单，加工制作方便。通过仿真，进行相应参数的验证。 随后，基于以上的几项工作，将无线键盘现场测试系统制作出实物，通过频谱仪进行指定频点的实物测试。测试结果表明该系统能够在2.4GHz频段内对周围的测试场的干扰很小，节省了测试空间，测试板一致性高，满足了量产测试工作环境的要求。 最后，总结了本文的工作，并对未来相关研究工作做了展望。
[Abstract]:In recent years, with the rapid development of wireless communication technology, wireless keyboard products are rapidly introduced and updated, the demand is increasing. In order to ensure its quality, it is necessary to produce a suitable mass production test system. The test template of conventional field test system is composed of discrete components, which has poor consistency and controllability in high frequency, which leads to the increase of uncertainty. At the same time, the plane layout of the test template will interfere with the external, resulting in excessive occupation of test space. Aiming at the above two problems, this paper designs a wireless keyboard field test system. The self-designed three-port attenuator is used in the test template of the system. Based on the coupler as the attenuator, the attenuator skillfully utilizes the loss characteristic of PCB to make the excess signal energy consume between boards. It not only overcomes the problem of high frequency consistency of the attenuator built by concentrated parameters, but also reduces the radiation in the air, effectively reduces the signal interference between the test systems, and saves the test space. The antenna unit is designed to reduce interference, and a set of test system is obtained. The system includes three parts: attenuation unit, circuit unit and antenna unit. The design principle and process of each part are given in detail. The measured results show that the system can realize the field test function, has good consistency and stability, and can ensure the reduction of interference between the test systems and improve the space utilization ratio. The work of this paper has provided the help for the design and transformation of the wireless keyboard field test system. This paper is divided into five parts. Firstly, the research status of wireless keyboard field test system is described, and the electromagnetic simulation software used in the design is introduced. And put forward the whole construction method of wireless keyboard field test system. Secondly, the design of three-port attenuator used in wireless keyboard field test system is analyzed and studied. Based on the principle of coupler, a 30dB attenuator with two kinds of attenuation quantities, microstrip line and strip line, is designed in the working frequency band. The object of these attenuators is made and measured, and the design is verified. One of them cleverly utilizes the loss of PCB substrate to eliminate the load resistance and effectively reduce the radiation interference. Then, the antenna used to send and receive signals in the system is designed. Two simple printed antennas, monopole and Yagi, are designed in this paper. Through simulation, the corresponding parameters are verified. Then, based on the above work, the field test system of wireless keyboard is made into physical object, and the physical test of specified frequency point is carried out by spectrometer. The test results show that the system can interfere little to the surrounding test field in the 2.4GHz band, save the test space, have high consistency of test board, and meet the requirements of mass production test environment. Finally, the work of this paper is summarized, and the future research work is prospected.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP334.23;TN92
本文编号：2309936
[Abstract]:In recent years, with the rapid development of wireless communication technology, wireless keyboard products are rapidly introduced and updated, the demand is increasing. In order to ensure its quality, it is necessary to produce a suitable mass production test system. The test template of conventional field test system is composed of discrete components, which has poor consistency and controllability in high frequency, which leads to the increase of uncertainty. At the same time, the plane layout of the test template will interfere with the external, resulting in excessive occupation of test space. Aiming at the above two problems, this paper designs a wireless keyboard field test system. The self-designed three-port attenuator is used in the test template of the system. Based on the coupler as the attenuator, the attenuator skillfully utilizes the loss characteristic of PCB to make the excess signal energy consume between boards. It not only overcomes the problem of high frequency consistency of the attenuator built by concentrated parameters, but also reduces the radiation in the air, effectively reduces the signal interference between the test systems, and saves the test space. The antenna unit is designed to reduce interference, and a set of test system is obtained. The system includes three parts: attenuation unit, circuit unit and antenna unit. The design principle and process of each part are given in detail. The measured results show that the system can realize the field test function, has good consistency and stability, and can ensure the reduction of interference between the test systems and improve the space utilization ratio. The work of this paper has provided the help for the design and transformation of the wireless keyboard field test system. This paper is divided into five parts. Firstly, the research status of wireless keyboard field test system is described, and the electromagnetic simulation software used in the design is introduced. And put forward the whole construction method of wireless keyboard field test system. Secondly, the design of three-port attenuator used in wireless keyboard field test system is analyzed and studied. Based on the principle of coupler, a 30dB attenuator with two kinds of attenuation quantities, microstrip line and strip line, is designed in the working frequency band. The object of these attenuators is made and measured, and the design is verified. One of them cleverly utilizes the loss of PCB substrate to eliminate the load resistance and effectively reduce the radiation interference. Then, the antenna used to send and receive signals in the system is designed. Two simple printed antennas, monopole and Yagi, are designed in this paper. Through simulation, the corresponding parameters are verified. Then, based on the above work, the field test system of wireless keyboard is made into physical object, and the physical test of specified frequency point is carried out by spectrometer. The test results show that the system can interfere little to the surrounding test field in the 2.4GHz band, save the test space, have high consistency of test board, and meet the requirements of mass production test environment. Finally, the work of this paper is summarized, and the future research work is prospected.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP334.23;TN92
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