4results about How to "Address cross-sensitivity issues" patented technology

This invention discloses an IoT-based electronic hardware system for agricultural environmental monitoring, aiming to solve problems such as low monitoring accuracy, weak anti-interference capability, and poor adaptability in different agricultural scenarios. The system adopts a core architecture of multispectral coupled sensing, layered anti-interference packaging, dual-mode communication, and neural network self-calibration, making it adaptable to various scenarios such as desert oases, tea gardens, and northern arid lands. By optimizing the sensing unit, strengthening the protective structure, and implementing adaptive power supply and real-time calibration algorithms, it achieves accurate monitoring of multiple dimensions, including temperature and humidity, soil / water quality parameters, and crop status. Its simple structure, convenient installation, strong resistance to interference from wind, sand, freeze-thaw cycles, and high humidity, and stable data transmission provide reliable data support for precise agricultural production management, adapting to various agricultural environmental monitoring needs.

The application belongs to the technical field of optical fiber sensors, and particularly relates to a double-parameter optical fiber sensor of MZI-FBG and a preparation and measurement method thereof. The double-parameter optical fiber sensor comprises a single-mode optical fiber, a trapezoidal waveguide is arranged in the cladding of the single-mode optical fiber, the trapezoidal waveguide is used for dividing incident light on the single-mode optical fiber into two beams at the junction of the cladding and the core, one of the two beams propagates along the waveguide and serves as a reference arm of the MZI, and the other beam continues to propagate in the core and serves as a sensing arm of the MZI; a Bragg grating and a micro groove are sequentially arranged on the core serving as the sensing arm of the MZI along the propagation direction of the light. The three functional units of the waveguide, the FBG and the micro groove are monolithically integrated on the single optical fiber, without the need of fusion, film coating or additional devices, the sensor structure is extremely compact, and the mechanical robustness is significantly better than that of a traditional fusion-type sensor.

The application discloses a warning method based on optical fiber multi-physical quantity dynamic separation, relates to the field of optical fiber communication and sensing technology, and realizes dynamic separation and high-precision sensing of multi-physical quantities on the same optical fiber medium through the organic combination of a sensing-integrated transmission signal design and a deep prior decoupling network, and effectively solves the cross-sensitivity problem; through the cooperative intelligent architecture of "edge fast sensing + center deep fusion", the real-time performance of event identification and warning is remarkably improved.

A peanut-shaped fiber optic biosensor for chloramphenicol measurement based on the SPR effect includes a broadband light source (SLED), a sensing structure, and an OSA (Optical Spectrum Analysis System). The sensing structure includes a single-mode fiber, a peanut-shaped fiber, a Bragg fiber grating (FBG), and a surface functional modification region. The surface functional modification region includes an APTES-modified region, a gold film, and a CAP-BSA coupling region. This invention utilizes a peanut-shaped structure to couple more light from the single-mode fiber core into the cladding, enhancing the SPR effect and improving sensitivity. Specific detection of chloramphenicol is achieved through the CAP-BSA coupling region on the fiber surface. Temperature testing is performed using a cascaded Bragg fiber grating to establish a temperature-chloramphenicol concentration sensitivity coefficient matrix, reducing temperature interference with chloramphenicol concentration detection, resolving cross-sensitivity issues, and improving accuracy. This invention features a compact structure, simple fabrication, high accuracy, and high sensitivity.