Multi-channel micro-flow control system

A control system, multi-channel technology, applied in the field of multi-channel microfluidic control system, to achieve the effect of reduced calibration cost, high precision and low cost

Pending Publication Date: 2020-07-28
北京高斯匹克技术有限公司
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Problems solved by technology

[0007] The invention of the composite multi-channel flow control system solves the problem of multiple channels of different gases, and the independent or unified control of each cha

Method used

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Embodiment Construction

[0027] 1. Obtain the calibration curve method flow:

[0028] a) Establish the external environment method: in the calibration seal chamber ( figure 1 -04) is connected to the temperature control system, and the high and low temperature gas supply equipment is connected through one end of the sealed through-board ( figure 1 -01), the other end is connected to the cooling system ( figure 1 -05), this temperature maintenance system does not conduct gas exchange with the calibration sealed chamber, only heat exchange, which can be controlled by software ( figure 1 -03) Set the temperature of the heat dissipation system regularly, and receive and record the temperature data in real time ( Picture 1-1 5). The pressure control system is connected to the calibration seal chamber, gas exchange is performed between the pressure control system and the seal chamber, and the seal chamber casing is directly connected to the vacuum pump ( figure 1 -07), directly connected to the numeric...

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Abstract

The invention discloses a multi-channel micro-flow control system and a calibration system thereof. The multi-channel micro-flow control system is applied to gas flow control and gas chromatography flow control and calibration. The multi-channel micro-flow control system comprises a flow control valve block and a data acquisition and analysis circuit; when multiple paths of different gases are used at the same time, different flows and different precisions of each path of gas are independently or uniformly controlled. An artificial intelligence algorithm is adopted in a calibration process, ahigh-dimensional calibration curve model and peripheral equipment suitable for the artificial intelligence algorithm are generated, and the problems of reference point pressure compensation and temperature compensation and valve switching-induced influences of internal pressure fluctuation on flow, influences of external environment changes on system internal flow and the like are solved at a time; high precision and low cost are achieved.

Description

Technical field: [0001] Gas flow control, gas chromatography flow control and calibration Background technique: [0002] 1. The existing flow control systems in the market are usually single-channel products, that is, one channel of flow is controlled each time, and the accuracy is about 1% of the full scale. The control principle is thermal conductivity type (mass flow type) or pressure type, and the control calibration algorithm is specific. Calibrate the flow rate results at the temperature (usually room temperature 25°C); [0003] 2. Whether it is thermal conductivity type or pressure type, the sensors used are sensitive to temperature, that is, the calibrated flow rate is different at different temperatures. Usually, domestic products of flowmeters with temperature compensation need to customize a specific temperature compensation, which is not universal. The price of imported products with temperature and pressure compensation is very high, but only one flow can be co...

Claims

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Application Information

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IPC IPC(8): G01N30/28G01N30/86
CPCG01N30/28G01N30/8665
Inventor 李玉株张垒朱晓红
Owner 北京高斯匹克技术有限公司
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