Alcohol concentration measuring device by using terahertz anisotropic medium resonance effect and method thereof

A resonance effect and alcohol concentration technology, applied in the field of terahertz waves, can solve problems such as complex calculations and extremely high requirements for light source stability

Inactive Publication Date: 2012-12-19
CHINA JILIANG UNIV
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  • Abstract
  • Description
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Problems solved by technology

Moreover, most of the models use the light intensity signal or the change of the quantity directly related to the intensity to realize the perception of the measured object, which has extremely high requirements on the stability of the light source, and the calculation is complicated

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  • Alcohol concentration measuring device by using terahertz anisotropic medium resonance effect and method thereof
  • Alcohol concentration measuring device by using terahertz anisotropic medium resonance effect and method thereof
  • Alcohol concentration measuring device by using terahertz anisotropic medium resonance effect and method thereof

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Embodiment Construction

[0019] Such as figure 1 , 2 As shown, the alcohol concentration measurement device using the resonance effect of terahertz heterogeneous media includes a polyimide substrate 1, a metal resonator ring array 2, an alcohol solution to be tested 3, a return wave oscillator 4, and a high-resistance silicon beam splitter 5. The first polytetrafluoroethylene lens 6, the second polytetrafluoroethylene lens 7, the first Schottky diode detector 8, the third polytetrafluoroethylene lens 9 and the second Schottky diode detector 10;

[0020] The metal resonant ring structure 2 arranged on the upper surface of the polyimide substrate 1, the alcohol solutions 3 to be tested with different concentrations are placed on the metal resonant ring array 2, and the metal resonant ring array 2 arranged on the lower surface of the polyimide substrate 1 The terahertz wave emitted by the return wave oscillator 4 is reflected by the high-resistance silicon beam splitter 5 and focused by the first p...

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Abstract

The invention discloses an alcohol concentration measuring device by using terahertz anisotropic medium resonance effect and a method thereof. The terahertz anisotropic medium in the invention is formed by arranging two layers of metal resonance ring arrays on upper and lower surfaces of a polyimide substrate. An alcohol solution to be measured is disposed on the metal resonance ring array at one side of the anisotropic medium; terahertz waves sent by a backward wave oscillator vertically enter the metal resonance ring array at the other side; when the terahertz waves scan and change within a certain frequency range, a double-layer metal resonance ring array reflection coefficient curve is obtained by detection by two schottky diode detectors. The resonance effect of the metal resonance rings allows the resonance peaks on the reflection coefficient curve to move with the change of the alcohol concentration. The frequency spectrum resolution of the backward wave oscillator is less than 5 MHz, and the resonance peak movement in the reflection coefficient curve is more than 25 GHz when the solution to be measured changes from pure water to pure alcohol, so the precision of the measuring device for measuring alcohol concentration is up to more than 0.02%.

Description

technical field [0001] The invention belongs to the technical field of terahertz waves, and relates to an alcohol concentration measuring device and method using the resonance effect of terahertz anisotropic media. Background technique [0002] Terahertz (Terahertz or THz, 1THz=10 12 Hz) waves usually refer to electromagnetic waves with a frequency in the range of 0.1 to 10 THz, and the energy of the photons is about 1 to 10 meV, which is roughly equivalent to the energy of the transition between molecular vibration and rotational energy levels. Most polar molecules such as water molecules and ammonia molecules have a strong absorption of terahertz radiation, and the transition between the vibrational energy level and rotational energy level of many organic macromolecules (DNA, protein, etc.) is also just in the terahertz range. Therefore, the terahertz spectrum of matter (including emission, reflection and transmission spectra) contains rich physical and chemical informati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/17
Inventor 李向军
Owner CHINA JILIANG UNIV
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