Nondestructive testing sensing system and method for growth process of mould on surface of object
A growth process, non-destructive testing technology, applied in the direction of measuring devices, color/spectral characteristic measurement, material analysis through optical means, etc., can solve the problems of easily damaged cultural relics, difficult installation and fixation, and inability to obtain characteristic absorption spectra of microorganisms
Pending Publication Date: 2022-05-27
CHONGQING UNIV OF TECH
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Problems solved by technology
Although these sensors have a strong ability to detect biological processes against environmental light interference, and the accuracy and resolution of the detection results are high; they can only obtain information on changes in biofilm thickness, but cannot obtain the characteristic absorption spectra of microorganisms.
At the same time, the existing optical fiber microbial sensor is a contact sensor, which is difficult to install and fix on silk cultural relics, and is easy to damage the cultural relics
Method used
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[0077] When the incident fiber radius R = 0.75mm, the receiving fiber radius r = 0.5mm, the fiber spacing x = 0mm, the optical path = 10mm, and the inner and outer fiber dislocation a / b = 1mm / 2mm, the absorption of the sensor to the silk sample attached to Aspergillus niger Spectral and absorbance response curves such as Figure 6a , Figure 6b shown.
[0078] Figure 6(a) shows that Aspergillus niger has two characteristic absorption peaks, located at 315 nm and 435 nm, respectively, and with the increase of culture time, the mold height increases and the absorbance increases. The reason is that with the increase of mold sample incubation time, the number and density of mold mycelium and spore heads on the silk surface increase, which enhances light absorption; at the same time, the increase of mold height indirectly reduces the optical path of the sensor and enhances light attenuation; in addition, the sensor output signal increased with the incubation time of the mold-stai...
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Abstract
The invention discloses a nondestructive testing sensing system and method for the growth process of mould on the surface of an object. The nondestructive testing system is characterized by comprising an operation table, an objective table, an optical fiber sensor, a light source, a spectrograph and a computer, the optical fiber sensor is composed of an incident optical fiber, a plurality of receiving optical fibers I and an optical fiber fixing sleeve; the optical fiber fixing sleeve is cylindrical, a through hole is formed in the center of the optical fiber fixing sleeve, the incident optical fiber is placed in the through hole, the first receiving optical fibers are evenly fixed to the front end face of the optical fiber fixing sleeve in the circumferential direction, and the front end faces of the first receiving optical fibers are located in front of the outer side of the front end face of the incident optical fiber. The optical fiber sensor is fixed on the operating table, a silk sample to be detected is placed on the objective table, and the distance between one end of the incident optical fiber and the silk sample to be detected is controlled by the operating table; the method can be widely applied to the fields of biology, textile, food, cultural relic protection and the like.
Description
technical field [0001] The invention relates to an optical fiber sensor, in particular to a non-destructive detection sensing system and method for a mold growth process on the surface of an object. Background technique [0002] Silk cultural relics are non-renewable and precious cultural resources. However, silk cultural relics are susceptible to mold contamination during burial or collection. Metabolites such as pigments and biological enzymes secreted by molds will cause huge and irreversible damage to cultural relics such as contamination, material embrittlement, fading and even decay, thus affecting the preservation of cultural relics and the continuation of their value. Therefore, the non-destructive, real-time online and accurate detection of the mold growth process on the surface of silk cultural relics will provide an important guarantee for effectively preventing and controlling mold diseases of silk cultural relics. [0003] At present, there are two main types ...
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IPC IPC(8): G01N21/25G01N21/31
CPCG01N21/25G01N21/31G01N21/255
Inventor 钟年丙薛正大赵雅赵明富曾檀唐欢余秋会
Owner CHONGQING UNIV OF TECH