Fluid micro-flux measuring method

A measurement method and micro-flow technology, applied in liquid/fluid solid measurement, measurement of flow/mass flow, measurement devices, etc., can solve the problems of precision and complexity, difficult to meet, and low accuracy of micro/nano upgrade micro-flow measurement. The effect of high measurement accuracy, low cost and broad application prospects

Inactive Publication Date: 2007-10-17
FUDAN UNIV
View PDF0 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both of these measurement technologies require sophisticated and complex processing technology, and the accuracy of micro/nano-lev...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Fluid micro-flux measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] 1. Select a section of fused silica capillary with an inner diameter of 75 μm, and wash the inner wall with dichloromethane and blow dry with nitrogen.

[0018] 2. The section of capillary tube is regularly wound into a tight spiral shape with a length of 39.70 cm per turn, and a scale is attached to the spiral surface.

[0019] 3. Fill the capillary tube with deionized water, and then inject 1cm Hg column, and then inject deionized water to seal this section of mercury, and ensure that there are no bubbles between the three.

[0020] 4. The flowmeter is connected to the end of the microfluidic liquid chromatography column through a two-way joint, and the distance that the mercury column moves in the microchannel within a certain period of time is measured, combined with the cross-sectional area data of the microchannel, and it can be calculated by the following formula Flow data:

[0021] F=S×L / t (1)

[0022] In the formula, F is the flow rate, S=4.4×10 -9 m...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Cross-sectional areaaaaaaaaaaa
Login to view more

Abstract

The invention which belongs to flow measurement technical field uses microchannel with cross section between 1x10-10 and 1x10-6m2 and obtains the flow data by calculation by measuring the distance of label moves in the microchannel in a certain time. The invention solves the problem of liquid flow measurement of micro/nano liter, the microflow measurement device which is designed with simple process, low costs, high measurement precision can be widely used in the field of biochemical analysis, chiral separation, neural science, protein and peptide analysis using the method of chip laboratory, microcolumn high performance liquid chromatography, etc.

Description

Technical field [0001] The invention belongs to the technical field of fluid flow measurement, and in particular relates to a method for fluid micro-flow measurement based on a constant-volume microchannel. technical background [0002] The progress of micro-electromechanical processing technology (MEMS) has greatly promoted the development of the miniaturization of analytical instruments. Scholars at home and abroad agree that in the future the development direction of the entire analytical instrument is mainly miniaturization, integration, and intelligence on this basis. [0003] Microfluidic technology (Microfluidic) is a high-tech developed in the 1990s and has broad application prospects in the miniaturization and integration of analytical instruments. How to accurately measure fluid flow in the field of microfluidics is a very critical technology. The current commonly used flow measurement methods can be basically divided into two categories according to the principle: 1. B...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01F1/00G01F1/704
Inventor 张祥民陶芊吴谦纪杰
Owner FUDAN UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap