All-digital energy-adjustable spark light source

Abstract

The invention relates to an all-digital energy-adjustable spark light source, and belongs to the technical field of spectrum analysis. The spark light source comprises an excitation control system, a spark energy-adjustable power supply circuit, a high-voltage ignition circuit, an argon control circuit, a control system and a USB interface control circuit. A computer transmits to an interface circuit through a USB interface by using control software; the interface circuit is connected with an excitation control circuit; and the excitation control system transmits control pulses to control themagnitude of the voltage of the spark power supply circuit so as to control the magnitude of the energy of spark discharge. In the excitation, an analytical gap is ionized by the high-voltage ignition circuit at first, and then the spark power supply circuit performs the spark discharge; in the excitation, the excitation control system controls the switching on and the switching off of argon simultaneously; and signals sampled in the excitation are transmitted to the computer through the USB interface. The all-digital energy-adjustable spark light source has the advantages that: the excitation discharge frequency and the spark discharge energy can be set continuously on the software to facilitate analyzing chemical compositions of materials with different properties; and excitation control signals are transmitted through optical fibers, so the anti-interference capacity is strong.

Description

technical field [0001] The invention belongs to the technical field of spectrum analysis and provides a spark light source with fully digital energy adjustable. It is used for direct reading spark spectroscopic analysis instrument. Background technique [0002] The excitation light source is an extremely important core component in the spark spectrometer. Its function is to provide excitation energy for evaporation and atomization to the analytical sample. In spectroscopic analysis, there is no clear boundary between the evaporation, atomization and excitation of the sample, and these processes are carried out almost simultaneously, and this series of processes directly affects the emission of the spectral line and the intensity of the spectral line. Excitation light sources with different energies have different evaporation behaviors for various samples and various elements. The main source of error in spark spectrum analysis is the light source. Therefore, the level of...

AI Technical Summary

Problems solved by technology

[0003] At present, the spark excitation light source equipped with domestic spark spectrometers cannot flexibly adjust the excitation energy according to different materials, resulting in poor analysis stability and accuracy.

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