Automatic bubble counting system based on photoelectric technology

Abstract

An automatic count system of bubbles based on the optoelectronic technology is disclosed. It includes air intake pipe, bubble pipe, glass-measuring tube, testing agents, light-emitting diode, D.C. regulated power supply, silicon photocell, amplifying circuit, data acquisition card and computer. The light signal signaled from the light-emitting diode can be inductive by the silicon photocell; the light signal can be transformed into voltage signal, amplified by the amplifying circuit, and input to computer via the data acquisition card. In the glass-measuring tube, the disturbance to light signal by bubbles raises a fluctuation of outcoming voltage signal outputted from silicon photocell when bubbles go by the testing agents, wave analysis is done to the acquiesced voltage signal by computer to realize the count of bubbles. The invention can realize automatic count of bubbles, has the advantages of simple structure, accuracy of count, wide effective measuring range, stabilization and reliability, and be widely used in quantitative measurement of tiny leakage and other condition of need to count bubbles.

Description

technical field [0001] The invention relates to an automatic bubble counting system based on photoelectric technology. Background technique [0002] In many occasions such as industrial production, aerospace technology, and scientific experiments, equipment with airtightness requirements is often involved, such as: pipelines, containers, heat exchangers, valves, and vacuum sleeves. In order to ensure the normal operation of this type of equipment, it must be checked for air tightness. At present, the commonly used qualitative air tightness leak detection methods include: listening method, soaking method, soapy water method, helium mass spectrometer method, etc. Due to some applications, such as hard-sealed valves, a certain amount of leakage is allowed. At this time, quantitative air tightness inspection methods must be adopted. At present, there are mainly: pressure measurement method, flow meter measurement method and bubble measurement method. The pressure measurement m...

AI Technical Summary

Problems solved by technology

The traditional bubble measurement method mainly relies on manual counting of bubbles, which not only consumes manpower, but also tedious counting work is prone to errors, especially when the frequency of bubbles exceeds 1Hz (that is, more than 1 bubble per second), it is difficult to rely on the naked eye. Achieve accurate counting

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