Laser frequency measurement

用法例句

The accuracy requirement of RF power-measuring is more and more high with the rapid development of communication and broadcast television industry.

本文基于公式P=1／2UIcosφ(U、I为电压、电流的峰值)，主要利用模拟乘法器、低通滤波器、电流互感器、分压器、运算放大器和电流表等，设计出一种射频功率测量的新方法，称为乘法式射频功率测量法。

A new scheme of frequency measuring and signal automatic following was proposed.

提出了一种基于AD9850的高频信号频率测量与信号跟踪方案,介绍了芯片AD9850的基本工作原理及性能特点,给出了基于AD9850的信号自动跟踪测量系统的硬件结构框图,并进行了分析说明。

This paper presents a useful method for frequency measuring.

频率是电力系统中一个十分重要的特征量,频率测量是电力系统测量装置中十分重要的环节。

The paper introduces the equal-precision frequency measuring principle, applied circuit and software design for sinlge-chip microcomputer AT89C51,char acterizde as wide-range and high-precision of frequency measuring.

介绍单片机应用系统中的频率测量方法,其特点是在不需要复杂的传统等精度频率测量控制的情况下,利用单片机的自身特性,实现宽范围内实用、简单而且精度较高的等精度频率测量。

High-accuracy frequency measurement scheme and its implementation;

高精度频率测量技术及其实现

Development of a new power system frequency measurement and alarm system;

一种新的频率测量与报警系统的研制

Digital Frequency Measurement Based on CPLD;

CPLD在数字频率测量中的应用

AD9850 and its application in measurement of frequency;

AD9850及其在频率测量中的应用

Based on the analyzing currently method of measurement of frequency,the principle of high quality measurement of frequency for SAW CO gas sensors is brought forward which unifies the Synchronous multicycle method and the frequency error multiplication method,with the aid of the entire synchronized mechanism and the frequency division technology.

声表面波(SAW)CO气体传感器的输出量是频率,因此高精度频率测定是保证其可靠性和正确计量的关键之一;尽管目前有多种频率测量方法,但适合并与传感器相配套的微型、高精度频率仪在国内尚罕见报道;我们在研究了现有频率测量方法的基础上,借助全同步机制、分频技术,将频率误差倍增法和多周期同步法相结合得到了一种适合于声表面波(SAW)CO气体传感器输出频率的测量方法,并给出了实现频率测量的原理和电路及其主要的电子元件。

Improvement on RF Power Measurement System in Mobile Phone Reliability Lab;

手机可靠性实验室射频功率测量系统的改进

the signal flowgraph of RF/microwave power measurement

射频/微波功率测量的信号流图表示

The Calculation and analysis of measurement uncertainties of RF/Microwave power measurement

射频/微波功率测量不确定度分析及计算

linear power measuring assembly based on gamma radiatio

辐射线性功率测量装置

power measuring assembly based on gamma radiatio

辐射法功率测量装置

Diffuser reflection method for measuring power/energy of far-field laser spot

漫射板反射式大直径激光功率-能量测量方法

The Design of the High Power RF Connecter and Development of the System for Measuring Power;

大功率射频连接器的设计和功率测试系统的建立

Measurement and analysis of EMF around pulsed power supplies

脉冲功率电源辐射电磁场测量与分析

Acoustics--Ultrasonic power measurement in the frequency range 0.5～10MHz

GB/T7966-1987声学0.5～10MHz频率范围内超声声功率的测量

Applying Terahertz Radiation to Measure the Resonant Absorption Frequency (ω_(TO)) of GaAs;

利用太赫兹电磁辐射测量GaAs的共振吸收频率ω_（TO）

Refractive index measurement of bio-tissue based on Fourier domain optical coherence tomography

基于频域OCT的生物组织折射率测量研究

SAR is a measure of the rate of absorption of RF energy in the body.

SAR是特定吸收率，是测量人体吸收射频能量比例的一种测量。

radio frequency emission testing

无线电频率放射测试

Measuring methods of power output for high frequency dielectric heating installatio

GB/T14809-1993高频介质加热设备输出功率的测量方法

Research on the Circuits of Power Factor Measurement of Switch Power Supply in Matlab

基于Matlab的高频开关电源功率因数测量电路研究

Acoustics--High-power characteristics and measurements of underwater sound projectors

GB/T7967-1987声学水声发射器的大功率特性和测量

Measurement of Radiated Power in Positive Column of Narrow Bore Low Pressure Mercury Discharges

细管径低气压汞放电正柱辐射功率的测量

Measurement and Control Design of Semiconductor Laser Diode Export Power Based on AD7896

基于AD7896的激光器出射功率测量与控制设计