This paper presents a new type of phase sensitive detector which consists of two sample and hold integrated circuits and a differential amplifier.
本文提出一种新型相敏检波器,它是由两个集成采样保持器和一个差分放大器组成,附加的转换电路使得这种相敏检波器可以被正弦参考信号控制。
In order to solve the problems of distinguishing polarity of the electric field in atmospheric electric field exploration,a new phase sensitive detector is designed,which is composed of electro-optical switch,quad analog switch and amplifier.
针对大气电场探测中电场极性的鉴别问题,基于传统相敏检波理论,结合大气电场仪探头的结构特点,设计了一种由光电开关、四通道模拟开关和运放构成的相敏检波器。
Electrical impedance tomography(EIT) system must have the properties of high precision and speed,thus the digital phase-sensitive detector(DPSD) based on the field programmable gate array(FPGA) is developed for data collection of EIT.
电阻抗成像对测量系统的精度和速度都有较高要求,为此研制了基于现场可编程门阵列(field programmable gate array,FPGA)的数字相敏检波器(digital phase-sensitive detector,DPSD)用于电阻抗成像的数据测量。
The main functions of its softwareare implemented for producing AC signals,phase sensitive demodulation,divided signals and linearization.
针对以往光纤气体传感器模拟信号处理电路的不足,基于DSP芯片TMS320F2812设计并实现了一种嵌入式光纤气体传感器信号处理系统;重点描述了硬件实现方法及其软件开发,其硬件主要由接口电路、高精度运放器OPA139P,32位高性能定点DSP(数字信号处理器)TMS320F2812和D/A转换芯片DAC7625组成;软件部分的主要功能是产生交流信号,完成两路输入信号滤波,相敏检波,相除、线性化处理等工作。
High-speed,high-precision digital phase-sensitive detector design for electrical impedance tomography
电阻抗成像中高速高精度数字相敏检波器设计
Research on Micro Capacitance Sensor and Phase Sensitive Detector Based on Pendulous Gravimeter
基于摆式重力仪的电容测微相敏检波器研究
Analysis and Design of Phase Sensitive Detector in Atmospheric Electric Field Mill
大气电场仪中相敏检波器的分析与设计
triaxial hydrophone system
三轴压敏检波器系统
Differential transformer-type sensor in the phase-sensitive detection circuit to improve the research
差动变压器式传感器中的相敏检波电路的改进研究
Digital psk applied in nondestructive inspection
数字移相相敏检波在涡流无损探伤的应用
Phase-Matched Filter: Application to the Identification of Surface Waves;
相位匹配滤波器在面波检测中的应用
Phase-sensitive technology and its application in complex resistivity logging tool
相敏检波技术及其在复电阻率测井仪中的应用
Method for Impedance Detection and Compensation Technique Based on DPSD
基于数字相敏检波的恒流源输出阻抗检测及补偿技术实现
variable wavelength HPLC detector
可变波长高压液相色谱检测器
Application of Surface Acoustic Wave Sensor in Liquid Detection;
声表面波传感器在液相检测中的应用
Study on Harmonic Current Detecting and Controlling of Three- Phase Shunt APF
并联型三相有源滤波器谐波电流检测控制研究
Sensitivity analysis of extrinsic Fabry-Perot interferometer optical fiber sensor for Lamb wave detection
光纤非本征法布里-玻罗传感器兰姆波检测灵敏度分析
Research of triaxial induction logging signal processing method based on phase sensitivity demodulation.
基于数字相敏检波的三维感应测井信号处理方法研究
The principal advantage over the dual filter coherent detection is a four-fold reduction in bandwidth.
与双滤波器相干检波相比的主要优点是带宽减少了四分之三.
sensitive microbiological detector
灵敏微生物学检定器
coordinate sensitive photodetector
坐标敏感光电检测器
mass flow rate senstive detector
质量流量敏感型检测器