Digital photon correlator of programmable gate array and photon measurement system
A technology of photon correlator and gate array, which is applied in measuring devices, instruments, scientific instruments, etc., can solve the problems of small number of channels, small photon capacity, increased delay time, etc.
Active Publication Date: 2021-05-11
清远华奥光电仪器有限公司 +1
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Problems solved by technology
[0004] Using a memory structure correlator, although the maximum number of integrated channels is large, the channel calculation delay time is long and the measurement efficiency is low; while the traditional correlator has a short calculation delay time, but the number of channels is small, and the measured photon capacity is small. If you increase the number of channels to improve, it will also increase the delay time, thereby reducing the measurement efficiency
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[0046] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0047] Currently commonly used correlators are divided into two types, one is the correlator based on the logic unit of the FPGA called the traditional correlator, and the other is the correlator based on two resources of the memory and the logic unit of the FPGA called the memory type correlator.
[0048] Using a memory structure correlator, although the maximum number of integrated channels is large, the channel calculation delay time is long and the measurement ...
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The invention discloses a digital photon correlator of a programmable gate array and a photon measurement system. The digital photon correlator comprises a system synchronous operation module, a photon calculation module, a correlation operation module and a communication control module which are arranged in an internal circuit of an FPGA chip, wherein the system synchronous operation module is connected with the photon calculation module, the correlation operation module and the communication control module; and the photon calculation module, the correlation operation module and the communication control module are sequentially connected, the photon calculation module is connected with an external photomultiplier, and the communication control module is connected with an external terminal. According to the invention, logic resources of the FPGA chip and memory resources in the FPGA chip can be fully utilized, and respective performance and advantages of the logic resources and the memory resources in the FPGA chip are fully exerted so that the operation speed and the maximum operation channel number of the FPGA hardware photon correlator are improved.
Description
technical field [0001] The invention relates to the technical field of particle size measurement by photon correlation spectroscopy, in particular to a digital photon correlator of a programmable gate array and a photon measurement system. Background technique [0002] In the process of particle size measurement, the information contained in the particle is obtained by measuring the similarity of the change of the scattered light intensity signal at different times. In order to obtain the information in the particle, it is necessary to perform correlation calculations on the scattered light intensity signal. The device is a photon correlator or a digital correlator. [0003] In the measurement of photon correlation spectroscopy, the hardware photon correlator is the main measurement device, and most photon correlators are implemented by FPGA. At present, there are two implementations of FPGA-based hardware photon correlators: one is implemented only based on FPGA-based logi...
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Login to View More IPC IPC(8): G01J11/00G01N15/02
CPCG01J11/00G01N15/0211
Inventor 韩鹏徐炳权邱健彭力骆开庆刘冬梅
Owner 清远华奥光电仪器有限公司