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Adjustable voltage source for ion chromatography system

An ion chromatography and voltage source technology, applied in the field of adjustable voltage sources for ion chromatography systems, can solve the problems of difficulty in realizing voltage regulation control of ADC chips and op amp chips, and achieve low cost, reduced control, and stable output. Effect

Pending Publication Date: 2022-01-21
ANHUI WAYEE SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problem that the adjustable voltage source of the existing ion chromatography system needs to use an independent PWM controller chip, ADC chip, operational amplifier chip and voltage stabilization control, and it is difficult to realize the problem. An adjustable voltage source for an ion chromatography system

Method used

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  • Adjustable voltage source for ion chromatography system
  • Adjustable voltage source for ion chromatography system
  • Adjustable voltage source for ion chromatography system

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Embodiment Construction

[0018] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0019] Such as Figure 1~2 As shown, the present embodiment provides a technical solution: an adjustable voltage source for an ion chromatography system, including: MCPWM output pin 1 of a single-chip microcomputer, MCABORT fast interrupt pin 2, OCADC pin 3 of the ADC on-chip of a single-chip microcomputer, and a test point TP (test point) 4~11, grounding point 12~18, resistor 19 (22Ω), resistor 20 (10kΩ), resistor 21 (22Ω), resistor 22 (100kΩ), resistor 23 (18kΩ), resistor 24 (1kΩ) , Resistor 25 (0.5Ω), Resistor 26 (1kΩ), Resistor 27 (10kΩ), Resistor 28 (2.7kΩ), Capacitor 29 (100nF), Capacitor 30 (4.7uF), Capacit...

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Abstract

The invention discloses an adjustable voltage source for an ion chromatography system, and belongs to the technical field of environmental protection monitoring, wherein the adjustable voltage source comprises an MOS tube, a transformer and a comparator, a grid electrode of the MOS tube is connected with an output pin of a single-chip microcomputer MCPWM, a source electrode of the MOS tube is connected with a negative input end of the comparator, and a drain electrode of the MOS tube is connected with one end of a primary coil of the transformer. The circuit structure is simple, output voltage ripples are similar, and the cost is low; wherein a PWM controller chip, an ADC chip, an operational amplifier and other chips are reduced, and meanwhile, control over a single chip microcomputer SPI is reduced, and MCPWM output, MCPWM interruption and ADC voltage collection control are added. By means of on-chip PWM and on-chip ADC, the PID adjustment is achieved, program control is relatively complex but voltage-stabilizing output can be better achieved, so that the output voltage of the voltage source is kept in a constant range, and the voltage source is worthy of being popularized and used.

Description

technical field [0001] The invention relates to the technical field of environmental protection monitoring, in particular to an adjustable voltage source for an ion chromatography system. Background technique [0002] Ion chromatography is a kind of high-performance liquid chromatography, also known as high-performance ion chromatography (HPIC) or modern ion chromatography, which is different from traditional ion-exchange column chromatography mainly because the resin has a high degree of cross-linking and a low exchange rate. Capacity, the injection volume is very small, and the eluent is delivered by a plunger pump, and the on-line automatic continuous conductivity monitoring of the eluate is usually carried out. Like general HPLC instruments, ion chromatographs are generally made into unit components first, and then the required unit components are combined according to the analysis requirements. The most basic components are voltage source, mobile phase container, high ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56G01N30/02G01N30/16G01N30/60
CPCG05F1/56G01N30/02G01N30/16G01N30/60
Inventor 方政陈有寿
Owner ANHUI WAYEE SCI & TECH CO LTD
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