Humidity and stress double-parameter sensing system based on near-infrared band double-peak PCF

A sensing system and near-infrared technology, applied in the direction of force measurement, measurement force, measurement device, etc. by measuring the change of optical properties of materials when they are stressed, which can solve the problems of poor manufacturing effect and limited performance of spectrometers. Effects of increasing stability, favoring the maintenance of polarization state, increasing birefringence properties, and dispersion properties

Pending Publication Date: 2022-03-04
HARBIN UNIV OF SCI & TECH
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Problems solved by technology

The above PCF-SPR sensor and the present invention are essentially different in the discrimination of the analyte state and the sensitivity calculation method, and the high-sensitivity sensor proposed at present is also limited by the performance of the spectrometer, so most of the PCF-SPR sensors currently only exist in Simulation theory, actual manufacturing effect is poor

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  • Humidity and stress double-parameter sensing system based on near-infrared band double-peak PCF
  • Humidity and stress double-parameter sensing system based on near-infrared band double-peak PCF
  • Humidity and stress double-parameter sensing system based on near-infrared band double-peak PCF

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Embodiment Construction

[0034] The specific implementation of the dual-parameter sensing system based on near-infrared band bimodal PCF magnetic field and stress proposed by the present invention will be described below with reference to the accompanying drawings.

[0035] Such as figure 1 As shown, the present invention provides a device diagram based on a dual-peak PCF magnetic field and stress dual-parameter sensing system in the near-infrared band. The light source (1) emits an optical signal and is transmitted to the sensing unit (3) through a single-mode optical fiber (1). Transmitted to the silver film (3-6), due to the inconsistency of the refractive index of the analytical solution (3-7) and the cladding (3-2), the surface plasmon phenomenon of the light occurs at the silver film (3-6), appearing Two bound loss peaks. The sensing unit (3) is output to the spectrum analyzer (4) and the photoelectric converter (5), and the photoelectric converter (5) converts the optical signal into an electr...

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Abstract

The invention provides a humidity and stress double-parameter sensing device and method based on near-infrared band double-peak PCF. The humidity and stress double-parameter sensing device comprises a light source (1), a single-mode optical fiber (2), a sensing unit (3), a spectrum analyzer (4), a photoelectric converter (5), a signal processing module (6) and a computer (7). According to the surface plasma resonance principle, humidity and stress are detected through the distance between two formants of a photonic crystal fiber of a special structure, and the result is displayed in a computer. According to the invention, a traditional wavelength sensitivity calculation method is replaced by a double-peak sensitivity formula, and the proposed novel sensing device adopts a double-peak sensitivity sensing method, has higher sensitivity and stronger stability, and can be widely applied to the fields of metal smelting, food processing, building materials and the like.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a dual-peak PCF humidity and stress dual-parameter sensing system based on near-infrared bands. Background technique [0002] As one of the three pillars of the information industry in the new century, biosensors have developed rapidly in recent years and are widely used in medical and health, agricultural industry, biomedical chemical detection and other fields. As one of them, surface plasmon sensor (SPR sensor) has received extensive attention and developed rapidly. The principle of surface plasmon resonance (SPR) is that light undergoes total reflection on the surface of a metal medium, and the surface plasmon polariton (SPP), that is, surface plasmon wave, is excited by the evanescent wave of total reflection, which leads to a large attenuation of total reflection energy. The principle of the SPR sensor is to measure the refractive index of the measured substa...

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Application Information

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IPC IPC(8): G01N21/359G01L1/24G02B6/02
CPCG01N21/359G01L1/242G01L1/248G02B6/02328
Inventor沈涛王振家李堃
OwnerHARBIN UNIV OF SCI & TECH