A Preliminary Study on CSAMT Anti-Jamming Transmitter System

2014 ◽  
Vol 962-965 ◽  
pp. 317-321
Author(s):  
Dang Li ◽  
Jun Lu Wang ◽  
Yong Li ◽  
Jian Hua Li ◽  
Pin Rong Lin
Keyword(s):  
Data Acquisition ◽  
High Voltage ◽  
High Speed ◽  
Low Voltage ◽  
Host Computer ◽  
Good Prospect ◽  
Interference Signal ◽  
Computer Data ◽  
Random Code ◽  
Data Acquisition Card

On the basis of the relevant identification theory of pseudo-random code signal, the signals of CSAMT are divided into three parts according to the frequency of the signal. The signals which are susceptible to 50Hz interference signal and its harmonic components should be set by pseudo-random code way. Others are set by single square waveform way. The Control and signal generation software of the transmitter system is built on the advanced virtual instrument platform, LabVIEW. The hardware of the transmitter system is mainly composed of host computer, data acquisition card, high-speed optocoupler, IGBT driver module and four IGBT switches. The data acquisition card generate PWM signals, the high-speed optocoupler isolates low-voltage part and high-voltage part. IGBT drive module and four IGBT switches constitute high-voltage part. Entire transmitter system is suitable for different environments and research tasks, the transmit frequency are adjustable, and the pseudo-random code signal has strong capability to suppress the interference signals. The control software on host computer is simple and clear. There is good prospect for the use.

Design of Data Transfer System Based on PCI Express Interface Applied in High-Speed Railway

2012 ◽  
Vol 229-231 ◽  
pp. 1543-1546
Author(s):  
Xiao Bo Zhou ◽  
Min Xia ◽  
Hai Long Cheng
Keyword(s):  
Data Acquisition ◽  
Data Transmission ◽  
High Speed ◽  
Data Transfer ◽  
Transmission Method ◽  
High Speed Railway ◽  
Pci Express ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition ◽  
High Speed Data

To improve data transmission performance of the data acquisition card, a design of high-speed data transmission system is proposed in the thesis. Using FPGA of programmable logic devices, adopting Verilog HDL of hardware description language, the design of modularization and DMA transmission method is implemented in FPGA. Eventually the design implements the data transmission with high-speed through PCI Express interface. Through simulation and verification based on hardware system, this design is proved to be feasible and can satisfy the performance requirements of data transmission in the high-speed data acquisition card applied in high-speed railway communication. The design also has some value of application and reference for a universal data acquisition card.

Test System for Mechanical Property of Geotextile Material Based on PCI-1714

2012 ◽  
Vol 455-456 ◽  
pp. 217-221
Author(s):  
Zhi Gang Liu ◽  
Qi Xiao Sun
Keyword(s):  
Mechanical Property ◽  
Data Acquisition ◽  
High Speed ◽  
Test System ◽  
Overall Design ◽  
Data Acquisition Software ◽  
Mechanics Performance ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition ◽  
High Speed Data

A solution of intelligent test system for mechanical property of geotextile material which based on high speed data acquisition card PCI-1714 is introduced in this paper. Microprocessor and drive card PCI-1240 are also used to control and drive the test equipment. The article discussed in detail the system’s overall design, the hardware structure, software design, and process of data acquisition. Software is designed by Visual Basic 6.0. This paper research and implement on accurate measurement of mechanics performance of geotextile material.

Remote Data Recorder Design Based on Embedded Linux

2014 ◽  
Vol 644-650 ◽  
pp. 4491-4495
Author(s):  
Ce Zhu ◽  
Hui Xu ◽  
Nan Li ◽  
Xiao Bo Tian ◽  
Hai Jun Liu
Keyword(s):  
Data Acquisition ◽  
High Speed ◽  
Embedded Linux ◽  
Pci Bus ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition ◽  
Pci Bus Interface ◽  
Interface Chip ◽  
And Storage ◽  
Remote Data

Radar, aerospace and wireless communications have a lot of demand for high-speed data acquisition and storage, in these applications, there is a need to control data collection and storage remotely, so researching safe, reliable, real-time remote data recorder is very meaningful. Based on Compact PCI IPC, putting ADC and data acquisition front-end into the chassis, using a dedicated PCI bus interface chip, to transmit data via Compact PCI backplane and record data to high-speed disk array. The platform use embedded Linux operating system to control high-speed and data acquisition. Users can manage data remotely by developing the data acquisition card driver and application software.

Design of Dual-Channel High-Speed Data Acquisition Card Based on USB 3.0 and FPGA

2012 ◽  
Vol 472-475 ◽  
pp. 2315-2319
Author(s):  
Peng Wang ◽  
Chen Wu
Keyword(s):  
Data Acquisition ◽  
Data Transmission ◽  
High Speed ◽  
Sampling Rate ◽  
Sampled Data ◽  
Dual Channel ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition ◽  
High Speed Data ◽  
Asynchronous Parallel

A high-speed data acquisition card using USB 3.0 interface has been designed in order to solve the problem that traditional data acquisition card could not take both data transmission bandwidth and easy connection with PC into account. The data acquisition card controlled the dual-channel 12-bit 20Msps ADC for asynchronous parallel sampling using FPGA as core control module, which made the sampling rate up to 40Msps. The sampled data which was processed by FPGA transferred synchronous from FIFO interface to PC via USB controller. The basic structure of hardware and the basic design method for software and firmware were given in this paper, in which how to use FPGA to realize FIFO was elaborated in detail. The timing simulation of using asynchronous parallel A/D conversion technology and using ADC device of 40Msps sampling rate for FIFO internal data transmission were simulated respectively, thus verified the reliability of asynchronous parallel A/D conversion.

scholarly journals A Single-Chip High-Voltage Integrated Actuator for Biomedical Ultrasound Scanners

Sensors ◽  
2019 ◽  
Vol 19 (23) ◽  
pp. 5063 ◽  
Author(s):  
Hsia ◽  
Hsiao ◽  
Huang
Keyword(s):  
Power Consumption ◽  
High Voltage ◽  
High Speed ◽  
Low Voltage ◽  
Second Harmonic ◽  
Pulse Signal ◽  
Silicon On Insulator ◽  
Imaging Systems ◽  
Output Stage ◽  
Static Power

This article presents a high-voltage (HV) pulse driver based on silicon-on-insulator (SOI) technology for biomedical ultrasound actuators and multi-channel portable imaging systems specifically. The pulse driver, which receives an external low-voltage drive signal and produces high-voltage pulses with a balanced rising and falling edge, is designed by synthesizing high-speed, capacitor-coupled level-shifters with a high-voltage H-bridge output stage. In addition, an on-chip floating power supply has also been developed to simplify powering the entire system and reduce static power consumption. The electrical and acoustic performance of the integrated eight-channel pulse driver has been verified by using medical-grade ultrasound probes to acquire the transmit/echo signals. The driver can produce pulse signals >100 Vpp with rise and fall times within 18.6 and 18.5 ns, respectively. The static power required to support the overall system is less than 3.6 mW, and the power consumption of the system during excitation is less than 50 mW per channel. The second harmonic distortion of the output pulse signal is as low as −40 dBc, indicating that the integrated multi-channel pulse driver can be used in advanced portable ultrasonic imaging systems.

Quality Inspection and Analysis of Workpiece Surface in A3 Steel Machining

2011 ◽  
Vol 55-57 ◽  
pp. 451-455 ◽  
Author(s):  
Qi Yong Zeng ◽  
Kai Wu ◽  
Xiao Feng Zheng ◽  
Ming Zhu
Keyword(s):  
Data Acquisition ◽  
Cutting Force ◽  
Surface Quality ◽  
High Speed ◽  
Cutting Temperature ◽  
Quality Characteristics ◽  
Measuring System ◽  
Time Data ◽  
Data Acquisition Card ◽  
High Speed Data Acquisition

Quality characteristics of steel workpiece and their inspection methods are introduced, and the influencing factors of surface quality are analyzed by quality tools. A set of inspection scheme for cutting temperature and cutting force on-line monitoring is worked out. Thin film thermocouple technology was introduced to measure the dynamic temperature which affects the surface quality characteristics of steel workpieces. A system for measuring cutting temperature and cutting force has been developed. A high speed data acquisition card ADlink PCI-9118HG is used to acquire the temperature and force signals. Simple and friendly human-machine interface was programmed with the application of VC++ technology and Tchart controllor to achieve real-time data acquisition, display and analysis of cutting temperature and cutting force. It was concluded from the experiment that the data acquisition and measuring system is easy and flexible to use.

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