Single-photon counting system for measuring weak luminescence of dielectric medium

Abstract

The invention discloses a single-photon counting system for measuring weak luminescence of a dielectric medium, comprising a single-photon photoelectric converting module, an input signal photoelectric separating module, a pulse signal output module, an external triggering signal collecting module, a triggering threshold adjusting module, a field programmable gate array (FPGA) module and a peripheral component interconnect (PCI) interface module. In the system, theFPGA module is adopted, so that the complex control circuit is mounted in one chip, the volume of the device is reduced and the design of the circuit is simplified, thereby being convenient for producing and debugging; and simultaneously, in the system, the PCI interface and PC (personal computer) are adopted to transfer the data so as to satisfy the requirements for measuring the weak luminescence of polymers by means of the excellent communication speed and interference resistance of the PCI interface.

Description

technical field [0001] The invention belongs to the research field of dielectric aging characteristics in electrical insulation technology, and in particular relates to a counting system for measuring weak luminescence of dielectrics. Background technique [0002] Dielectric materials are an essential part of almost all electrical and electronic systems, used to achieve electrical insulation and mechanical fixation of charged bodies. Under the action of an electric field, the dielectric will gradually age and produce partial discharge. Recent studies have shown that the dielectric will have a weak luminescence before partial discharge. Therefore, the weak luminescence is closely related to the initial stage of dielectric aging. [0003] Because the weak luminescence of the dielectric is different from the luminescence of the weak light-emitting device, its luminous intensity is very weak, usually expressed by the number of photons. Therefore, single-photon detection technolo...

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Problems solved by technology

[0004] In view of the high price of photon counting equipment in the research of weak luminescence of existing polymers, and the data storage capacity and anti-interference performance cannot meet the needs of real-time and accurate collection and storage of a large amount of data, the purpose of this invention is to propose a method for the measurement of weak luminescence of dielectrics Counting system, which uses a programmable logic gate array module to complete the complex control circuit in one chip, which can not only reduce the size of the device, but also meet the needs of polymer weak luminescence photon measurement

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