Electron pressure controller

A controller and pressure technology, which is applied in the direction of electric fluid pressure control, etc., can solve the problem of low control accuracy, and achieve the effects of reducing analysis time, increasing the scope of application, and improving control accuracy and accuracy.

Active Publication Date: 2011-06-22
SHANGHAI SHENKAI GASOLINEEUM TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing carrier gas circuit generally uses a series combination of a pressure stabilizing valve and a stabilizing flow valve to complete the adjustment and stabilization of the flow rat

Method used

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  • Electron pressure controller
  • Electron pressure controller
  • Electron pressure controller

Examples

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Example Embodiment

[0012] The embodiments of the present invention are further described below in conjunction with the drawings.

[0013] For the specific implementation of the electronic pressure controller of the present invention, please refer to figure 1 As shown, the electronic pressure controller of the present invention includes a control comparison circuit 1, a signal processing circuit 2 and a digital-to-analog conversion control module 3 respectively connected to different input terminals of the control comparison circuit 1, and a ratio connected to the output terminal of the control comparison circuit 1. Solenoid valve 4. The input end of the signal processing circuit 2 is connected to the pressure sensor 5, the input end of the digital-to-analog conversion control module 3 is connected to the external digital input device 6, and the control comparison circuit 1 is also connected to the reference analog; the power module provides stability for all functional modules in the instrument ene...

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Abstract

The invention relates to an electron pressure controller, which comprises a control comparison circuit, a signal processing circuit, a digital to analog conversion control module and a proportional electromagnetic valve, wherein the signal processing circuit and the digital to analog conversion control module are connected with the input end of the control comparison circuit respectively; and the proportional electromagnetic valve is connected with the output end of the control comparison circuit. Electron control is adopted, so that control accuracy and correctness are improved, and the analysis time is shortened; the proportional electromagnetic valve is adopted, so that internal closed loop control and an external pressure sensor are provided, and accuracy and resolution are enhanced; and the digital to analog conversion control module is provided, so that an analog quantity and a digital quantity can be controlled, and the application range of an instrument is expanded.

Description

technical field [0001] The invention relates to a pressure control technology, in particular to an electronic pressure controller. Background technique [0002] At present, in the gas chromatograph, the change of the carrier gas flow rate has a particularly prominent impact on the sensitivity of the instrument, so ensuring the stability of the carrier gas flow rate is an extremely important condition for the reliability of chromatographic qualitative and quantitative analysis. The existing carrier gas circuit generally uses a series combination of a pressure stabilizing valve and a stabilizing flow valve to complete the adjustment and stabilization of the flow rate. The disadvantage of the existing pressure stabilizing valve is that it must ensure sufficient pressure during use to ensure the flow speed stability, and the control accuracy is not high. Contents of the invention [0003] The invention provides an electronic pressure controller, which adopts electronic contro...

Claims

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Application Information

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IPC IPC(8): G05D16/20
Inventor 毕东杰吴冠玮
Owner SHANGHAI SHENKAI GASOLINEEUM TECH
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