Digital correlator for photon correlated nanometer zetasizer
A digital correlator and nanoparticle technology, used in particle size analysis, scientific instruments, individual particle analysis, etc., can solve the problems of large deviation of correlation functions, inability to perform cross-correlation calculation, and high price, and achieve the effect of saving hardware resources.
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[0053] Attached below Figure 1-9 The digital correlator used in the photon correlation nanometer particle size analyzer of the present invention will be described in detail below.
[0054] as attached figure 1Shown, the present invention sets correlation operation mode (being autocorrelation operation or cross-correlation operation) by correlation operation mode selection end, if select autocorrelation operation mode, then photon pulse 1 only imports the photon counting module 1 in the FPGA, the photon counting module 1 counts the photon pulses in the preset sampling time interval, and transmits the counting result to the correlation operation module 4, and then the correlation operation module 4 performs multiplication and accumulation operations in sequence according to the set delay channel to complete the autocorrelation operation, and finally The autocorrelation calculation result is transmitted to the computer 7 through the USB communication module 5 to complete the e...
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