1) frequency scanning
频扫
1.
Some factors influencing the accuracy of frequency scanning 3D shipborne radars;
影响舰载频扫三坐标雷达精度的几种常见因素
2) sweep frequency
扫频
1.
In this paper,the different frequency ultrasonic and sweep frequency ultrasonic is used to degum ramie,which shows that the effect of sweep frequency ultrasonic is perfect.
文章通过采用不同频率的超声波和扫频式超声波对苎麻脱胶的对比试验,说明了扫频式超声波对苎麻脱胶的优势,并通过分析苎麻原麻的结构和超声波脱胶特性对扫频式超声波这一优势加以解释。
2.
When using digital selective lever meters or digital sweep frequency meters, users are accustomed to alter frequency by rolling wheel, thus in the new design the users conventional operating custom is retained.
在数字选频表或数字扫频仪使用中 ,由于用户习惯使用转轮来改变频率 ,所以在新仪器的设计中保留这些用户操作方便的使用习惯 ,文章介绍了在数字化控制中如何检测转轮转动的方向 ,如何获得转轮转动的快慢 ,从而根据转轮的转动速度改变频率变化 ,达到扫频的良好效果。
3.
Numerical-controlled and sweep frequency signal generator is made by integrated function generator ICL8038 and AT89C2051.
本设计是以ICL8038和AT89C2051为核心设计的数控及扫频函数信号发生器。
3) swept frequency
扫频
1.
The design of IIR digital filter in swept frequency ground resistance measurement;
扫频型接地电阻测量中IIR数字滤波器的设计
2.
Broadband swept frequency RCS automatic measurement system;
宽带扫频RCS自动测量系统
3.
This paper introduces the method,step and notice of using vector network analyzer to measure broadband swept frequency Radar Cross Section(RCS) in RF simulation anechoic chamber,and elaborates the principle test technology to improve the measurement accuracy.
介绍了利用矢量网络分析仪在射频仿真暗室内进行宽带扫频雷达散射截面测量的方法、步骤、应注意的问题,以及为提高测量精度采用的主要测试技术,并结合实验测试证明了该方法在射频仿真暗室中进行雷达散射截面测量的可行性。
4) sweep
[英][swi:p] [美][swip]
扫频
1.
A new kind of virtual sweep signal source which can be used to output specific sweep signal according to(users ) configuration and can be widely applied to frequency characteristics measurement in the field of mechanics,electrics and electronics,is developed by using Dot Net software engineering technique,C/S architecture and general data acquisition platform.
Net软件开发技术,C/S体系结构规范及通用数据采集硬件平台,开发出一种可依据用户设定的特征参数产生所需信号,广泛应用于机械及电工、电子测试领域的虚拟扫频信号源,不仅弥补了传统硬件化仪器对硬件需求较高及功能单一等固有缺陷,还具有高精度、远程控制和数据处理等新特性,展示了虚拟仪器技术的强大生命力和美好应用前景。
2.
This article describes the design of a linear sweeping frequency signal generator using DDS technology.
本文介绍了利用DDS来产生线性扫频信号的射频信号发生单元的设计。
5) frequency scanning
扫频
1.
In coordination with the application of post-set arc suppression coil,a frequency scanning based modified method for detecting system capacitance to earth is proposed.
为配合随调式消弧线圈的使用,提出了一种扫频检测系统对地电容的改进型方法。
2.
By means of a frequency scanning method, the electrode parameters of RF waveguide lasers, such as the characteristic impedance, phase constant, distributed inductance, and distributed capacitance, etc, can be measured.
根据传输线理论，射频波导激光器的电极可近似为无损耗均匀传输线，采用扫频方法，可测量出射频波导激光器电极的重要参数，如特性阻抗、相移常数、相速、分布电感及分布电容
3.
A high pressure-measuring precision is obtained by using methods like optimized frequency scanning,reasonable pulse counting,low noise signal processing circuit designing and effective temperature compensation,etc.
介绍了一种成熟的设计方案,通过采用优化的扫频激励方式、合理的脉冲计数方法、低噪声信号调理电路设计和有效的温度补偿等途径,获得了较高精度的压力测量值,是脉冲计数法测压场合的较好选择。
6) frequency sweep
扫频
1.
Image processing method is used to carry out frequency sweep and voltage sweep measurement.
利用图像处理方法对MEMS谐振器做扫频和扫压测量 ,获得了MEMS器件的平面微运动特性 ,并对测量结果进行了分析和讨论 。
补充资料：动态频率扫描
动态频率扫描
超声学检查技术之一。通过多频探头和可变带通滤波器的结合，不用更换探头，就能自动转换工作频率，在近场使用高频率，在远场使用低频率的技术。具有高分辨力和高灵敏度这两个互相排斥的特点，可把各个单频探头的图像质量最佳之处取出并组合一体。采用超低杂波、宽带放大器及超声波发射、接收效率均佳的多层探头，从而做到分辨力高，穿透性强，图像清晰，杂波少。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条