Simple microfluid flow velocity measuring device

Abstract

The invention relates to a simple microfluid flow velocity measuring device. The simple microfluid flow velocity measuring device is composed of a microflow chip and a bubble detection image collecting device, wherein the microflow chip is formed by a fluid flow velocity measuring channel, a bubble injection channel and a bubble generating channel. One end of the bubble generating channel is sealed, and the other end of the bubble generating channel is communicated with the fluid flow velocity measuring channel. One end of the bubble injection channel is sealed. The sealed end of the bubble injection channel is opposite to the sealed end of the bubble generating channel. A breathable waterproof membrane is arranged between the two sealed ends, and the bubble detection image collecting device is externally connected with a computer. The simple microfluid flow velocity measuring device has the advantages that the flow velocity measuring mode is simple, fluid cannot flow back into a gas channel, gas is separated from the fluid after an experiment, and direct measurement of the flow velocity of the fluid is achieved. The simple microfluid flow velocity measuring device is reasonable in design and simple in structure, and is highly integrated, the fluid cannot be polluted, and the simple microfluid flow velocity measuring device is suitable for measurement experiments, needing to measure the microfluid flow velocity losslessly, of micro-fluidic chips.

Description

technical field [0001] The invention relates to a simple microfluid flow rate measuring device. It belongs to fluid measurement technology. Background technique [0002] The micro-total analysis system was proposed in the early 1990s to realize micro-scale biochemical analysis chip system. The micro-total analysis system has the remarkable characteristics of fast detection speed, less sample consumption, and high throughput. Polydimethylsiloxane (PDMS) is a polymer with excellent transparency, low cytotoxicity, and gas permeability. Microfluidic chips based on PDMS and glass slides have been widely used in biochemical micro-systems. analysis system. In the microfluidic chip system, the flowing liquid is the main carrier medium. Measuring the actual flow velocity of the microfluid and adjusting it according to actual needs is one of the core parameters of the biochemical analysis and inspection process and one of the core technologies of microfluidics. The flow rate of mi...

AI Technical Summary

Problems solved by technology

At the same time, the introduction of impurities is something that is not allowed to happen in most experiments. The introduction of impurities or measurement errors in experiments that require high purity and precision will easily lead to experiment failure.

Therefore, the problem of microfluidic flow rate measurement has become the main obstacle hindering the development of micro total analysis system for a long time.

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