Miniature ethanol solution concentration detection device and method

Abstract

The invention relates to a miniature ethanol solution concentration detection device and method. The detection device comprises a light source, an input coupling lens, a photonic crystal, an output coupling lens, a photoelectric detector and a display. The light source adopts a laser device with a certain wavelength, the laser device is selected according to a formula as shown in the specification, alpha (micrometer) refers to lattice constant, delta Gap refers to the central value of a maximum normalized band gap range corresponding to a TE mode of solution to be detected under different concentrations, lambda 0 refers to the central wavelength of the selected laser device, and the tuned wavelength range is determined according to the wavelength corresponding to the maximum band gap. Theminiature ethanol solution concentration detection device is high in sensitivity, dielectric constant can be changed as long as the concentrations are slightly changed, the band gap can be changed, and the concentrations can be detected by the photoelectric detector.

Description

technical field [0001] The invention discloses a solution concentration detection device and method, in particular a miniature ethanol solution concentration detection device and method. Background technique [0002] Ethanol, commonly known as alcohol, is a basic industrial raw material widely used in military industry, medicine, chemical industry, food and other fields. my country is a big wine-producing country with a long history of "wine culture". More than half of the Chinese people have the habit of drinking. Appropriate drinking can not only relieve fatigue and reduce psychological pressure, but also create a pleasant atmosphere, which is beneficial to people's daily life and work. As we all know, there are many varieties of wine on the market, but the quality varies greatly. The quality of wine mainly depends on the quality control of fermented products in the production process, and the determination of ethanol concentration is one of the keys to the quality contr...

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Problems solved by technology

The refractive index method uses the difference in physical properties between ethanol and methanol, but the accuracy is not high; the density bottle method has high measurement accuracy, but the operation is cumbersome and time-consuming, and the analysis time is long; the alcohol meter method is easy and fast to operate, and is a common method for ethanol determination. Poor anti-interference performance; chemical oxidation method and spectrophotometric analysis method are easy to use and easy to operate; near-infrared spectroscopy has the advantages of no pollution, no destructive, no pretreatment, convenient and quick, etc., but the integration is not high; fluorescence photometry Wide linear range, high sensitivity, and good selectivity, but strict temperature control is required; laser Raman spectroscopy requires expensive instruments and is not suitable for rapid on-site detection; microbial electrode method has good reproducibility and selectivity, and can be tracked and monitored , but the electrode life is short

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