High-field asymmetric voltage generator

Abstract

The invention provides a high-field asymmetric voltage generator, comprising an asymmetric voltage modulation circuit, a booster output circuit, a waveform phase-locked feedback circuit and a work status indicator circuit. The asymmetric voltage modulation circuit is used for comparing input voltage VC and a feedback signal VF acquired from the booster output circuit to output an asymmetric peaked waveform, then shaping and filtering the asymmetric peaked waveform and acquiring asymmetric original modulation waveform VS; the booster output circuit boosts and amplifies the VS and outputs an amplified high-field asymmetric voltage signal V0 to high-field asymmetric waveform ion mobility spectrometry (FAIMS) equipment; the waveform phase-locked feedback circuit is used for regulating variable voltage jittering of the waveform caused by temperature to a standard work status; and the work status indicator circuit is used for indicating the quality of the present waveform and notifying a control system when the asymmetry of the waveform descends to a certain extent; and the booster output circuit is respectively connected with the asymmetric voltage modulation circuit, the waveform phase-locked feedback circuit and the work status indicator circuit. The high-field asymmetric voltage generator has the advantages of volume reduction, reduction of power consumption and cost and improvement of stability.

Description

technical field [0001] The invention relates to the technical field of safety detection, in particular to a high-field asymmetrical voltage generator. Background technique [0002] With the progress of society and the development of science and technology, the potential danger brought by the development of civilian biochemical technology and the threat of international biochemical terrorism are highlighted. The threat of explosives cannot be ignored, and thousands of civilians are injured by terrorist explosives every year. Detection techniques for explosives, chemical weapons and various dangerous goods are also constantly improving. Most of these instruments are imported, and the operation is complex, bulky, bulky, expensive, and poor in portability. [0003] High-field asymmetric waveform ion mobility spectrometry (FAIMS for short) is a new distinguishing detection method different from traditional ion mobility spectrometry (IMS for short). Explosive substance detection...

AI Technical Summary

Problems solved by technology

[0006] The traditional method is to generate DC high voltage first, and then generate an asymmetric waveform through Pulse Width Modulation (PWM), but this method requires greater power consumption to maintain high voltage, and requires high-voltage and high-power insulated gate bipolar transistors. (Insulated Gate Bipolar Transistor, IGBT for short) to generate PWM waves

Images