Multi-band fault diagnosis system and its application in the maintenance of acoustic logging tools
多频段故障检测系统在声波仪器维修中的应用
Current control measures of power quality are analyzed and the hybrid power filter composed of APF(Active Power Filter) and PPF(Passive Power Filter) is presented for the power quality control of high voltage and large capacity.
该控制策略根据混合滤波器的逆变电路系统的状态方程和输出反馈信号推算出下一个采样周期的脉冲宽度,并且采用状态观察器预估系统的状态,提前算出控制量以补偿CPU的采样和计算时延,避免对指令电流的跟踪过冲,提高了系统动态性能。
China Wuhan Quality Supervision & Testing Center for Medical Ultrasound Equipment
国家武汉医用超声波仪器质量监督检测中心
Multi-band fault diagnosis system and its application in the maintenance of acoustic logging tools
多频段故障检测系统在声波仪器维修中的应用
This is an instrument with which we can generate supersonic wave.
这是一台能产生超声波的仪器。
Development of the Portable Digital Ultrasonic Testing Device;
便携式数字化超声波检测仪器的研究
The new technology is smaller and cheaper than regular ultrasound machines.
新仪器比传统的超声波仪更小巧而且更便宜。
Study on Passive Wireless SAW Sensor and Instrument System;
无源无线声表面波传感器及仪器系统研究
sonic comparator
声波比较[比长]仪
The Study on the Simulation of the Borehole Acoustic Reflection Imaging Logging Tool and It's Waveform Processing Method;
声反射成像测井仪器仿真及波形处理技术研究
Study on the Method and Instrument of Milk Components Rapid Analysis by Ultrasonic;
超声波牛奶成分快速检测方法及仪器研究
Multi-gas photoacoustic spectrum analysis of nonlinear fitting method
基于波导CO_2激光器光声光谱仪的性能优化
Research on Ultrasonic Liquid Level Non-contact Measurement in Sealed Vessel
密闭容器非接触式超声波液位测量仪的研究
Design of an Ultrasonic Detecting System Based on Virtual Instrument
基于虚拟仪器的超声波检测系统的研制
Transducer Firing Method for Multi-pole Array Acoustic Logging Tool
多极子阵列声波测井仪的换能器激励方法
Architecture and Hardware & Software Design of Ultrasonic Tomography Virtual Instrument;
虚拟仪器B型超声波诊断仪系统结构与软硬件设计
EFFECT OF THE FREQUENCY OF ACOUSTIC CEMENT BOND LOGGING TOOL ON THE ACOUSTIC CHARACTERISTICS OF CEMENT STONE
声波水泥胶结测井仪器频率对水泥石声学特性的影响
Designing Isolator of Logging-While-Drilling Acoustic Tools Using Three-dimensional Finite-difference Time-domain Method
用三维时域有限差分法研究随钻声波测井仪器隔声体的设计
echo meter=echometer
回声测试器回声测深仪
seismometer testing apparatus
地震检波器测试仪器