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

A technology of alcohol concentration and resonance effect, applied in the field of terahertz waves, which can solve the problems of complex calculation and extremely high light source stability requirements.

Inactive Publication Date: 2014-08-06
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 polyt...

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Abstract

The invention discloses an alcohol concentration measuring device and a method thereof utilizing the resonance effect of a terahertz anisotropic medium. In the terahertz anisotropic medium of the present invention, two metal resonant ring arrays are arranged on the upper and lower surfaces of the polyimide substrate. Place the alcohol solution to be tested on the metal resonant ring array on one side of the heterotropic medium, and the terahertz wave emitted by the return wave oscillator is vertically incident on the metal resonant ring array on the other side, and the terahertz wave scans and changes within a certain frequency range The reflection coefficient curve of the double-layer metal resonant ring array is obtained by using two schottky diode detectors. The resonance effect of the metal resonant ring makes the resonance peak on the reflection coefficient curve move with the alcohol concentration. Because the spectral resolution of the back wave oscillator is less than 5MHz, the resonant peak of the reflection coefficient curve moves more than 25GHz when the solution to be tested changes from pure water to pure alcohol in the present invention, so that the accuracy of the measuring device for measuring alcohol concentration can reach 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 Patents(China)
IPC IPC(8): G01N21/17
Inventor 李向军
Owner CHINA JILIANG UNIV
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