Abstract
In measurement system by means of pulse laser, such as plasma measuring, laser ranging, the amplitude of echoed laser wave is very weak and difficult to detect by traditional analog electronic technology. A digital high speed data acquisition and processing system was designed to meet the accuracy requirement. It adopted high speed AD chip and advantage FPGA chip as core unit. Experiment results have verified this system can reach to 1GHz sample rate and can catch weak echo wave effectively and the measuring accuracy is improved markedly.
Highlights
In many engineering application, such as plasma characteristics measuring, laser ranging, remote dust concentration measuring, and so on, the pulse laser technology were adopted widely[1-4]
To deal with such cases, a pulse signal detecting and processing system was designed. It adopted high speed AD device and the fast data processing ability of FPGA. This system can well work under condition of low signal to noise ratio (SNR), narrow pulse width, little echo wave amplitude
It required the AD device was in very high sampling rate, and ADC08D1000 was selected because it had two-channel sample function and
Summary
In many engineering application, such as plasma characteristics measuring, laser ranging, remote dust concentration measuring, and so on, the pulse laser technology were adopted widely[1-4]. As the precision requirement is higher, the pulse width is narrower, and the echo wave energy received by the detector is lower. To deal with such cases, a pulse signal detecting and processing system was designed. It adopted high speed AD device and the fast data processing ability of FPGA. This system can well work under condition of low signal to noise ratio (SNR), narrow pulse width, little echo wave amplitude. The AD chip ADC08D1000 which work in 1 GHz sampling rate, and the EP2S60 FPGA chip, are applied as core components
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