In this paper, the principle of transit-time differential method of ultrasonic flow measurement is introduced along with the discussion of its advantages and disadvantages. 本文讨论了时差法成品油超声波流量计的基本原理、优缺点等。
Error Analysis and Study on Transit-time Ultrasonic Flowmeter 时差法超声波流量计误差分析与研究
Review of the Signal Processing Techniques in Transit-Time Ultrasonic Flowmeters 传播时间法超声流量计信号处理技术进展述评
A Preliminary Study on Synthetic Aperture Ladar Investigation on Novel Transit-time Oscillators 合成孔径激光雷达新型渡越时间振荡器的研究
Radial Transit Time Oscillator ( RTTO) is a promising novel high power microwave source based on the radial transit-time effect. It can operate under the condition of low impedance and without external guiding magnetic fields. 径向渡越时间振荡器(RadialTransitTimeOscillator,简称RTTO)是一种前景光明的基于径向渡越时间效应的新型高功率微波源,能在低阻抗、无外加磁场条件下工作。
We have investigated the electron beam transit-time effect in the π-mode standing wave electric field in the nonuniform two-cavity and three-cavity oscillator under the small signal condition. Mathematical expression of the beam-to-microwave power conversion efficiency has been obtained. 研究了小信号条件下,电子在非均匀两腔和非均匀三腔谐振腔π模驻波场中的渡越时间效应,得到了束波功率转换效率的函数表达式。
Experimental Investigation of the X-Band Transit-Time Tube Oscillator X波段渡越管振荡器的实验研究
In the end, the measurement methods of two important parameters ( transit-time r and half-wave voltage of LiNbO_3 Multi-function Integrated Optical Device) are presented. 最后,将电路与光路连接起来整体调试,给出了两个重要参数(光纤渡越时间τ和波导调制器半波电压)的测定方法。
In order to have the high-power-microwave ( HPM) source of the three-unit transit-time tube oscillator ( TTTO) has the character of unidirectional beam and line polarization, a circular waveguide bevel cut radiation antenna is designed. 为了使三腔渡越管振荡器高功率微波源的输出具有单向波束及线极化的辐射特性,设计了圆波导斜劈结构的伏拉索夫型天线。
This paper discusses the following problems: Anomalies of acoustic transit-time ( Ax) near a compact and extension fault. 本文用正演方法讨论的问题有:声波速度(或声波时差)在断层附近的异常;
Wireless interrogation of a transit-time SAW passive sensor 时间延迟型声表面波无源传感器的无线访问
Numerical simulations of C-band three-cavity transit-time oscillator C波段三腔渡越时间振荡器的数值模拟
A novel high power and high frequency coaxial transit-time oscillator 一种新型的高功率高频率同轴渡越时间振荡器
In this paper, a gas ultrasonic flowmeter with transit-time difference measurement has been designed. 本文研制时差法气体超声波流量计,包括流量计硬件电子线路和软件设计。
Design of Ultrasonic Flow Meter Based on Improved Transit-time Method 基于改进时差法的超声流量计
Hydrodynamic theory of the interaction in radial transit-time oscillator 径向渡越时间振荡器互作用特性的流体理论分析
Therefore, research of wide-beam ultrasonic transit-time flowmeter is significative not only to industry but to measurement technology. 因此宽波束时差法超声波流量计的研究无论对于工业生产还是测量技术的提高,都是一项极有意义的研究课题。
By analyzing the principle of the method of recovering the denudation thickness by interval transit-time and its application situation, the author thinks that the method can be used to solve the problem of denudation after the end of K_1n. 通过分析利用声波时差资料恢复剥蚀量方法原理及其适用条件,认为该方法能够解决滨北地区嫩江组末期之后地层的剥蚀问题。
Recent Developments and Applications of Transit-Time Laser Distance Sensor 传输时间激光测距传感器
Theoretical and experimental results show that this method can eliminate the Doppler ambiguity spectra produced by transit-time effect, turbulence and velocity gradient in sample volume. 理论与实验研究结果表明该方法可消除渡越时间效应、湍流和采样单元内流速梯度造成的频谱模糊。
So the studying has the academic and practical meaning. Firstly, in order to accomplish the modelling of multi-path ultrasonic gas flowmeter, measuring principle of transit-time method of ultrasonic gas flowmeter is analyzed, and many factors influencing flow measurement is also analyzed. 首先,为完成多声道超声波气体流量计的机理建模,分析了时差法超声波气体流量计测量原理,分析了影响流量测量的诸多因素。
The three-cavity transit-time oscillator ( TC-TTO) is a promising HPM source based on the axial transit-time effect. 三腔渡越时间振荡器是一种前景光明的、基于轴向渡越时间效应的高功率微波器件。
According to the principle of transit-time measurement, the ultrasonic signal acquisition is the most important factors affecting the accuracy. 在时差法测量原理中,超声波信号的采集是影响精度的最重要因素。