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PCF (Pohotonic Crystal Fiber)-SPR (Surface Plasma Resonance) structure sensor capable of simultaneously measuring hydrogen and methane

A PCF-SPR, sensor technology, applied in the sensor field, achieves high sensitivity and linearity, enhances sensing performance, and improves gas sensitivity

Pending Publication Date: 2019-09-10
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current measurement principle is mainly based on optical absorption spectroscopy technology, the biggest challenge is how to obtain higher relative sensitivity and lower cost loss

Method used

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  • PCF (Pohotonic Crystal Fiber)-SPR (Surface Plasma Resonance) structure sensor capable of simultaneously measuring hydrogen and methane
  • PCF (Pohotonic Crystal Fiber)-SPR (Surface Plasma Resonance) structure sensor capable of simultaneously measuring hydrogen and methane
  • PCF (Pohotonic Crystal Fiber)-SPR (Surface Plasma Resonance) structure sensor capable of simultaneously measuring hydrogen and methane

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Embodiment Construction

[0020] Such as figure 1 and 2 As shown, a PCF-SPR structural sensor capable of simultaneously measuring hydrogen and methane consists of a broadband light source (1), an optical attenuator (2), a gas chamber (3), a PCF-SPR sensor (4), and an air inlet ( 5), composed of an air outlet (6) and a spectrometer (7); it is characterized in that: the light emitted by the broadband light source (1) enters the PCF-SPR sensor (4) placed in the gas chamber (3) through the optical attenuator (2) ) left end, mixed gases such as hydrogen and methane to be detected are introduced by the air inlet (5), and the right end of the PCF-SPR sensor (4) is connected to the spectrometer (7) for real-time monitoring, and the section of the PCF-SPR sensor (4) has a diameter Smaller pores of 1.5 microns are arranged along angles of 45 degrees and 135 degrees, four super large pores of 5 microns are distributed vertically and horizontally, and the inner surfaces of two super large side holes in the claddi...

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Abstract

The invention discloses a PCF (Pohotonic Crystal Fiber)-SPR (Surface Plasma Resonance) structure sensor capable of simultaneously measuring hydrogen and methane. The PCF-SPR structure sensor is composed of a broadband light source, an optical attenuator, an air chamber, a PCF-SPR sensor and a spectrograph. Small air holes with a diameter of 1.5 microns are arranged at an angle of 45 degrees and 135 degrees on the cross section of the PCF-SPR sensor, and four ultra-large air holes with a diameter of 5 microns are vertically and horizontally distributed on the cross section of the PCF-SPR sensor, wherein the inner surfaces of the two ultra-large side holes are respectively coated with a hydrogen-sensitive film made of gold and a palladium-WO3 composite film, and a methane sensitive film madeof gold and an ultraviolet light curing fluorosilicone nano film. A gas sensing channel causes different peak shifts at different wavelengths; through structural parameter optimization, a gas mixtureof methane and hydrogen can be accurately measured by combining a side hole structure and polarization filtering without interfering with each other; and the PCF-SPR structure sensor has good multi-channel gas sensing repeatability, and a selective detection method can be applied to gases and other sensing applications, and has a good application prospect.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a PCF-SPR sensor capable of simultaneously measuring hydrogen and methane. Background technique [0002] In order to realize the sustainable development of the energy environment, the government vigorously promotes the clean heating work of "coal-to-gas" in winter in the northern region. people's attention. Due to factors such as pipeline aging, corrosion, and defects, natural gas pipeline leakage accidents often occur. Methane is the main component of natural gas and coal-bed methane. It is a flammable and explosive gas. Methane leakage may threaten people's lives and property, causing Therefore, the development of intelligent, digital and miniaturized methane sensors is the top priority in the monitoring and detection of methane concentration. [0003] Hydrogen is an efficient and clean fuel with the potential to be infinitely recyclable. Due to the small size of hydrogen molecules, s...

Claims

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Application Information

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IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 沈常宇张崇宫佳琦
Owner CHINA JILIANG UNIV
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