Brain fatigue monitoring device based on fiber optic sensor technology

Abstract

A brain fatigue monitoring device based on fiber optic sensor technology, comprising a base plate (7), characterized in that mounting plates (3) are fixedly connected to the four corners of the underside of the base plate (7), small spring dampers (2) are fixedly connected to the undersides of the mounting plates (3), a seat cushion frame (1) is fixedly connected to the undersides of the small spring dampers (2), a flexible frame (8) is fixedly connected all around to the top of the base plate (7), a seat cushion (6) is arranged inside the flexible frame (8), a nitrile rubber mat (5) is fixedly connected to the underside of the inner wall of the seat cushion (6), fiber optic guide holes (20) are formed on the left and right sides of the back of the flexible frame (8), and a control box (4) is fixedly connected to the underside of the base plate (7).a laser emitter (13) is permanently connected to the left side of the top of the inner wall of the control box (4), a single-mode optical waveguide (14) is permanently connected to the output end of the laser emitter (13), a 1-to-2 optical waveguide coupler (15) is permanently connected to one end of the single-mode optical waveguide (14), a sensor optical waveguide (12) is permanently connected to the detection end of the 1-to-2 optical waveguide coupler (15), the sensor optical waveguide (12) passes through the optical waveguide guide holes (20), is arranged in an S-shape inside the seat cushion (6), the sensor optical waveguide (12) is arranged on the top of the nitrile rubber mat (5), the detection end of a 2-to-1 optical waveguide coupler (22) is permanently connected to one end of the sensor optical waveguide (12), a signal receiver (21) at is firmly connected to the right side of the 2-to-1 optical fiber coupler (22),a signal line (18) is permanently connected to the output end of the signal receiver (21), a data acquisition device (19) is permanently connected to one end of the signal line (18), and a data processing unit (17) is permanently connected to the left side of the data acquisition device (19).

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