In this work we describe a multi-parameter data acquisition system(DAQ)which has been developed for the Shanghai EBIT.This system is operated at the collision research platform which includes a recoil-ion momentum spe...In this work we describe a multi-parameter data acquisition system(DAQ)which has been developed for the Shanghai EBIT.This system is operated at the collision research platform which includes a recoil-ion momentum spectrometer(RIMS).We have employed DAQ based on the VME system,which is a very fast developing system within the RIMS community,and with which we can reach data transfer rates of up to 160 Mb·s- 1.The software developed for DAQ based on UnisDX-XP is also described.展开更多
设计了一种200 MS/s、16 bit的模数转换(Analog to Digital Converter,ADC)数据采集卡,采集卡使用了ADC芯片AD9467对模拟信号进行采样,并以FPGA作为数据传输控制单元,采用DDR3进行数据存储,数据写速度达到了68. 3Gb/s。数据通过千兆以...设计了一种200 MS/s、16 bit的模数转换(Analog to Digital Converter,ADC)数据采集卡,采集卡使用了ADC芯片AD9467对模拟信号进行采样,并以FPGA作为数据传输控制单元,采用DDR3进行数据存储,数据写速度达到了68. 3Gb/s。数据通过千兆以太网传输至计算机,数据传输速率最高达782 Mb/s,满足高速采样和数据传输要求。对数据采集卡的动态性能进行了测试,测试结果表明采样系统在其带宽内的有效位在12. 1～12. 6的范围内,设计满足采集卡的性能要求。展开更多
The electromagnetic radiation will result in informa- tion leakage being recovered when computers work. This article presents a high-speed real-time data acquisition system based on peripheral component interconnect ...The electromagnetic radiation will result in informa- tion leakage being recovered when computers work. This article presents a high-speed real-time data acquisition system based on peripheral component interconnect （PCI） bus and field programmable gate array （FPGA） for sampling electromagnetic radiation caused by video signal. The hardware design and controlling flow of each module are introduced in detail. The sampling rate can reach 64 Msps and system transfers speed can be up to 128 Mb/s by using time interleaving, which increases the overall sampling speed of a system by operating two data converters in parallel.展开更多
The dynamic range of the currently most widely used 24-bit seismic data acquisition devices is 10–20 d B lower than that of broadband seismometers, and this can affect the completeness of seismic waveform recordings ...The dynamic range of the currently most widely used 24-bit seismic data acquisition devices is 10–20 d B lower than that of broadband seismometers, and this can affect the completeness of seismic waveform recordings under certain conditions. However, this problem is not easy to solve because of the lack of analog to digital converter(ADC) chips with more than 24 bits in the market. In this paper, we propose a method in which an adder, an integrator, a digital to analog converter chip, a field-programmable gate array, and an existing low-resolution ADC chip are used to build a third-order 16-bit oversampling delta-sigma modulator. This modulator is equipped with a digital decimation filter, thus facilitating higher resolution and larger dynamic range seismic data acquisition. Experimental results show that, within the 0.1–40 Hz frequency range, the circuit board's dynamic range reaches 158.2 d B, its resolution reaches 25.99 bits, and its linearity error is below 2.5 ppm, which is better than what is achieved by the commercial 24-bit ADC chips ADS1281 and CS5371. This demonstrates that the proposed method may alleviate or even completely resolve the amplitude-limitation problem that so commonly occurs with broadband observation instruments during strong earthquakes.展开更多
基金Supported by Shanghai Leading Academic Discipline Project(Project Number:B107)the Project-sponsored by SRF for ROCS,SEM
文摘In this work we describe a multi-parameter data acquisition system(DAQ)which has been developed for the Shanghai EBIT.This system is operated at the collision research platform which includes a recoil-ion momentum spectrometer(RIMS).We have employed DAQ based on the VME system,which is a very fast developing system within the RIMS community,and with which we can reach data transfer rates of up to 160 Mb·s- 1.The software developed for DAQ based on UnisDX-XP is also described.
文摘设计了一种200 MS/s、16 bit的模数转换(Analog to Digital Converter,ADC)数据采集卡,采集卡使用了ADC芯片AD9467对模拟信号进行采样,并以FPGA作为数据传输控制单元,采用DDR3进行数据存储,数据写速度达到了68. 3Gb/s。数据通过千兆以太网传输至计算机,数据传输速率最高达782 Mb/s,满足高速采样和数据传输要求。对数据采集卡的动态性能进行了测试,测试结果表明采样系统在其带宽内的有效位在12. 1～12. 6的范围内,设计满足采集卡的性能要求。
基金the National Natural Science Foundation of China （60331010, 60271018）.
文摘The electromagnetic radiation will result in informa- tion leakage being recovered when computers work. This article presents a high-speed real-time data acquisition system based on peripheral component interconnect （PCI） bus and field programmable gate array （FPGA） for sampling electromagnetic radiation caused by video signal. The hardware design and controlling flow of each module are introduced in detail. The sampling rate can reach 64 Msps and system transfers speed can be up to 128 Mb/s by using time interleaving, which increases the overall sampling speed of a system by operating two data converters in parallel.
基金supported by the National Natural Science Foundation of China(Grant No.41404142)the National Science and Technology Support Plan Project(Grant No.2012BAF14B12)+1 种基金the Basic Research Projects of Institute of Earthquake Science,CEA(Grant Nos.2014IES0201,2011IES0203&2015IES0406)the Earthquake Monitoring and Prediction Project,CEA(Grant No.16A46ZX262)
文摘The dynamic range of the currently most widely used 24-bit seismic data acquisition devices is 10–20 d B lower than that of broadband seismometers, and this can affect the completeness of seismic waveform recordings under certain conditions. However, this problem is not easy to solve because of the lack of analog to digital converter(ADC) chips with more than 24 bits in the market. In this paper, we propose a method in which an adder, an integrator, a digital to analog converter chip, a field-programmable gate array, and an existing low-resolution ADC chip are used to build a third-order 16-bit oversampling delta-sigma modulator. This modulator is equipped with a digital decimation filter, thus facilitating higher resolution and larger dynamic range seismic data acquisition. Experimental results show that, within the 0.1–40 Hz frequency range, the circuit board's dynamic range reaches 158.2 d B, its resolution reaches 25.99 bits, and its linearity error is below 2.5 ppm, which is better than what is achieved by the commercial 24-bit ADC chips ADS1281 and CS5371. This demonstrates that the proposed method may alleviate or even completely resolve the amplitude-limitation problem that so commonly occurs with broadband observation instruments during strong earthquakes.
