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Infrared optical fiber oil fume concentration sensor

A technology of oil fume concentration and infrared light, which is applied in the direction of instruments, scientific instruments, and material analysis through optical means, can solve the problems of unable to solve the measurement error of oil fume adhesion, unable to adapt to oil fume pollution, and unable to apply oil fume monitoring, etc., to achieve structural Simple, easy to replace, stable and reliable performance

Inactive Publication Date: 2014-08-13
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, the existing technologies and means based on smoke monitoring cannot be adapted to oil smoke pollution with high adhesion, and cannot be applied to oil smoke monitoring, and cannot solve the problems of measurement errors and short instrument life caused by oil smoke adhesion

Method used

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  • Infrared optical fiber oil fume concentration sensor
  • Infrared optical fiber oil fume concentration sensor
  • Infrared optical fiber oil fume concentration sensor

Examples

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Embodiment 1

[0030] This embodiment is the structure of an infrared optical fiber oil fume concentration sensor of the present invention. Such as figure 2 and image 3 An infrared optical fiber oil fume concentration sensor shown mainly includes: an infrared laser 3, a narrowband optical fiber 1, a broadband optical fiber 2, an optical fiber connector 5 and a photoelectric detector 4; Figure 4 and Figure 5 As shown, the optical fiber connector 5 mainly includes: a narrowband optical fiber connector 5-1, a broadband optical fiber connector 5-2, a mesh grid 5-3, and an oil fume detection channel 5-4; the grid 5- 3. It is preferably a stainless steel grid; the surface of the grid 5-3 is coated with a hydrophobic and oleophobic coating; as Figure 6 As shown, the narrowband optical fiber 1 includes an optical fiber cladding 1-1, an optical fiber core layer 1-2, and a hydrophobic and oleophobic coating 1-3 is coated on the core section at the narrowband connector 5-1; as Figure 7 As sho...

Embodiment 2

[0032] This embodiment is the oil fume concentration measurement of the infrared optical fiber oil fume concentration sensor of the present invention. The structure of the infrared optical fiber oil fume concentration sensor is as described in embodiment 1. Further, the grid is a stainless steel grid; a standard oil fume generator is used to produce oil fumes of various standard concentrations, and the oil used is Arowana soybean salad oil. The infrared optical fiber For the measurement results of the oil fume concentration sensor, see Figure 9 , monitoring for 3 hours a day, see the measurement results after continuous use for one month Figure 10 . Depend on Figure 9 and Figure 10 The results show that the ultrasonic oil fume concentration sensor has reliable measurement results, stable performance and strong anti-pollution ability.

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Abstract

The invention discloses an infrared optical fiber oil fume concentration sensor which mainly comprises an infrared laser of 3.4 microns, a narrow-band optical fiber, a wide-band optical fiber, an optical fiber connector and a photoelectric detector, wherein the infrared laser is transmitted to an oil fume detection channel consisting of a hollow inner cavity of the optical fiber connector through the narrow-band optical fiber, oil fume is subjected to characteristic absorption at a place of 3.4 microns, the transmission light intensity reflects the concentration of the oil fume and can be received by the photoelectric detector, and data of a CPU (Central Processing Unit) are processed so that the concentration of the oil fume can be accurately obtained in real time. According to the infrared optical fiber oil fume concentration sensor disclosed by the invention, the optical fiber connector provides the detection channel for a fixed light path, plays roles in connecting, fixing and collimating the narrow-band optical fiber and the wide-band optical fiber without a straightening and focusing lens, and is stable and reliable in performance, simple in structure and convenient to replace. In addition, a hydrophobic and oleophobic coating of a fiber core section at a joint of a mesh of the optical fiber connector and each optical fiber is capable of effectively preventing the oil fume from being adhered, so that the reliability of a measurement result and the stability of instrument performance are ensured.

Description

technical field [0001] The invention relates to an oil fume concentration sensor, in particular to an infrared optical fiber oil fume concentration sensor. Background technique [0002] The catering industry produces a large amount of oily fumes during cooking, which is the main source of urban air pollution. The air pollutants emitted by it are mainly aerosols composed of gas, liquid and solid phases, which contain volatiles of edible oil and food at high temperature, aldehydes and ketones formed by oxidation, cracking and hydrolysis of edible oil and food Hydrocarbons, alkanes and alkenes, polycyclic aromatic hydrocarbons and other products, the composition is extremely complex. The particle size of solid-phase particles of cooking fume liquid is generally less than 10 μm, with strong adhesion, most of them are insoluble in water, and have low polarity. With the deepening of kitchen fume research by various research institutions, the harm of kitchen fume to human body ha...

Claims

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Application Information

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IPC IPC(8): G01N21/3504
Inventor 顾文秀邹路易杨光东刘世伟卢先领徐升吴志江
Owner JIANGNAN UNIV
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