14 results about "Optic sensor" patented technology

Methods and systems for in-fluid testing of electro optic liquid sensors are provided. The electro optic sensor has a light source and a light detector such that a first power state is applied to the light source to generate a first light for determining whether liquid is present within the electro optic sensor. Based on a determination that liquid is present within the electro optic sensor, a second power state is applied to the light source for generating a second light. The second power state having higher power over a shorter period of time than the first power state. The second light generated from the light source is reflected and the reflected second light is received at the light detector. The reflected second light is compared to a pulse current threshold value to determine whether the electro optic sensor is functioning properly.

The application discloses a bladder pressure closed-loop control system and method with a fiber-optic sensor magnetic suction interface, and belongs to the technical field of medical devices. The application sets an independent backward-inclined fiber-optic sensor magnetic suction interface in a holding dead zone of a proximal end hub of an inner sheath, and guides the fiber-optic sensor to a distal end through a metal microtube welded by a laser in a wall of the inner sheath; a "metal-ceramic composite reinforcement" structure is adopted to embed a fiber-optic Fabry-Perot pressure sensor in a lateral wall of a ceramic beak, and an induction diaphragm of the sensor is configured to face away from a central flow passage of the inner sheath and face a radial periphery of the ceramic beak; the layout realizes complete decoupling of a monitoring path and a surgical execution path in a physical space, and guarantees in-situ and real-time monitoring of intravesical pressure in a strong electromagnetic interference environment. Meanwhile, a millisecond active pressure relief is triggered by a system host when pathological spasm is monitored, and a pressure-time integral (PTI) is calculated in real time to quantify a liquid absorption risk.

The present invention relates to a sensor system for an airfoil and related airfoil arrangement, aircraft and method. The sensor system comprises a fiber-optic sensor, a light source, an optical circulator and a signal processing device. The fiber-optic sensor is configured for attachment to the airfoil and comprises a fiber-optic core comprising a first half and a second half divided by a virtual plane extending in an axial direction of the fiber-optic core, in which first and second half a first and a second Bragg grating are respectively inscribed with different grating periods. The light source is connected to a first port of the optical circulator, an upstream side of the fiber-optic sensor is connected to a second port of the optical circulator, and the signal processing device is connected to a third port of the optical circulator. The fiber-optic sensor receives light emitted by the light source and reflects an optical signal associated with the center wavelengths of the first and second Bragg gratings to the signal processing device. The signal processing device calculates a deformation and / or a temperature of the fiber-optic sensor based on the optical signal.

The utility model discloses a kind of for hydrometallurgy electrolytic cell electrolyte temperature on-line sensing device in the technical field of hydrometallurgy, including sensing structure and fixed structure, the sensing structure includes inner tube, outer tube and fiber-optic sensor, the outer tube sleeve is connected on inner tube, the outer wall upper end of inner tube is fixedly connected with limit stopper;The top of outer tube is threadedly connected with limit cap, the limit cap is movably connected with inner tube, the limit stopper is located at the top of outer tube, and located in the inside of limit cap;The bottom of inner tube is provided with winding part, one end of the fiber-optic sensor passes through inner tube and is wound on winding part;The outer wall of outer tube is uniformly provided with through-hole one. The present application can be convenient for electrolyte temperature on-line sensing and monitoring, and can also effectively protect the fiber, avoid being scratched and damaged by knocking, so as to avoid affecting monitoring sensitivity.

The utility model discloses a kind of roller shutter door structures, it is related to roller shutter door technical field, to solve the problem that part of existing roller shutter door will influence shooting equipment identification accuracy. Its technical scheme main point is: including support frame and the taking and placing opening being penetrated and being set on support frame, and the roller shutter structure for plugging the taking and placing opening is dynamically connected on support frame, and the roller shutter structure includes two roller shutter parts at the length direction two sides of the taking and placing opening and two drive parts for driving the closure of roller shutter part, and the taking and placing opening is surrounded between two roller shutter parts, and the roller shutter part at taking and placing opening is fixedly connected with connecting frame, and camera and fiber-optic sensor inside support frame are respectively fixedly connected on two connecting frames. The utility model is set to make that shooting equipment can better realize the function of identification.

Provided is a method for measuring fluid's viscosity and mass flow, including the steps of immersing one end of an optical fiber into fluid, emitting a light beam by a light source, receiving the light beam by the optical fiber; and measuring the viscosity and the mass flow of the fluid in a sink based on a displacement of the one end of the optical fiber. The method further includes tapering the one end of the optical fiber and coating a surface of the one end of the optical fiber with a deposited gold thin film as a mirror. The light source is an unpolarized diode laser. Accordingly, the size of the measurement system setup is reduced by using ultra-small sensors. Moreover, the present disclosure also provides methods for fluid's viscosity and mass flow measurement by using intensity modulating sensors, elliptical core two-mode fiber-optic sensors and Fabry-Perot interferometer sensors.

The present application relates to the field of fiber-optic sensor fiber-optic gyroscope, and particularly relates to a kind of combination structure sensor and leap time fiber-optic gyroscope temperature compensation method and system, comprising: structural temperature data is obtained by acquisition;Obtain the leap time data of optical wave transmission in optical fiber ring one circle;Obtain the zero bias shift data and scale factor data of fiber-optic gyroscope;Leap time data is converted, and the optical fiber ring optical path temperature data is obtained;Based on structural temperature data, optical fiber ring optical path temperature data, zero bias shift data and scale factor data, multiple linear regression is carried out, and temperature error compensation model is established;Real-time acquisition structural temperature and optical fiber ring optical path temperature are input into the temperature error compensation model, and zero bias shift prediction value and scale factor prediction value are obtained, and the original angular rate is compensated using zero bias shift prediction value and scale factor prediction value, and compensation angular rate is obtained.The present application can improve the performance of fiber-optic gyroscope temperature compensation.

The utility model provides a kind of for 12 inch wafer box's handling gripper, solve the problem that conventional handling equipment is difficult to horizontally type's clamping wafer box and detecting wafer box whether horizontal placement, its main scheme includes: mounting plate, support plate and angle seat, support plate horizontal placement and in one end through angle seat with The mounting plate vertical fixed, its other end is also provided with first clamping plate and second clamping plate, first clamping plate and second clamping plate are connected and fixed with support plate bottom surface by fixed block, and first clamping plate and second clamping plate are exposed fixed block and form relative type's clamping groove, clamping groove is fixed with the positioning pin and limit block for positioning wafer box, wafer box side surface and the inside surface of mounting plate are fitted, and its top surface is fixed with the boss corresponding with clamping groove, the both ends of boss corresponding clamping groove are equipped with fiber-optic sensor, and each end fiber-optic sensor includes at least 3, and the two fiber-optic sensors of outer side are horizontally aligned and the height is higher than the fiber-optic sensor of middle position setting.

The present application relates to a kind of track crack detection devices based on magneto-optic, belong to crack detection technical field.The device includes: surface light source, for generating light beam;Magneto-optic sensor, at the surface of measured track preset distance, for sensing the leakage magnetic field generated by measured track due to crack in magnetic field environment, and leakage magnetic field information is modulated as the polarization state change of reflected light beam;Industrial camera, for collecting reflected light beam after being modulated by magneto-optic sensor, generate magneto-optic image;Control processing module is at least connected with industrial camera, for receiving magneto-optic image, and identifying crack in measured track.By the device, real-time online detection under normal running speed of train can be realized.And detection is not covered by surface contaminants such as oil stain, rust mark, water stain, dust.

The utility model relates to tunnel yielding support technical field especially is a kind of supporting device for soft rock tunnel construction, including wavy surface layer, triangular hole support layer, buffer layer, steel support structure, anchor rod and fiber-optic sensor;The utility model adopts the combination design of wavy surface and triangular hole, through the unique design of tunnel structure, can effectively disperse and absorb the pressure from around tunnel, reduce the stress concentration of structure, to improve the durability and deformation resistance of tunnel, simultaneously, combined with anchor rod and steel support structure usage form " first soft later rigid " supporting system, initial period passes through wavy surface and triangular hole deformation release stress, later period passes through anchor rod reinforcement control deformation rate, have flexible yielding and structural support function simultaneously, to improve the stability and security of tunnel structure.

A sensor for monitoring AC currents and / or AC magnetic fields includes an optical fiber structure and a cladding / sensing layer coupled to the optical fiber structure, the cladding / sensing layer comprising a composite embedded media member, wherein the composite embedded media member includes magnetic nanoparticles embedded in a host media. Also, systems and methods for monitoring AC currents and / or AC magnetic fields that incorporate such a sensor.

The application discloses a kind of oblique high-sensitivity electro-optic sensors, comprising: substrate, lower cladding, flat plate layer, two oblique electro-optic modulation electrodes, two antennas and upper cladding, two oblique electro-optic modulation electrodes are symmetrically arranged on the two sides of any ridge waveguide;And the inclined surface of two oblique electro-optic modulation electrodes is oppositely arranged;First antenna and second antenna are arranged on the top surface of upper cladding, respectively with the sidewall surface of first oblique electro-optic modulation electrode and second oblique electro-optic modulation electrode passing through upper cladding are connected.The application is by using electrode inclination design to electro-optic modulation electrode, the electric field between waveguide is significantly enhanced to further improve electro-optic overlap factor, compared with traditional electro-optic sensor and the more common high-sensitivity electro-optic sensor of present, there is significant improvement in sensitivity, enhances the monitoring ability of weak signal of electro-optic sensor under long distance or complex background.

The application belongs to the technical field of optical fiber sensing, and particularly relates to a kind of optical fiber sensors based on magneto-optical surface plasmon resonance. The optical fiber sensor is formed by removing the cladding of a single-mode optical fiber through polishing and grinding to form a D-shaped optical fiber region; a metal film and a magneto-optical film are sequentially coated on the plane of the D-shaped optical fiber region to form a D-shaped optical fiber sensing region; a magnetic field is applied in the vertical direction of the optical fiber sensing region; probe light from a broadband light source is input from one end of the single-mode optical fiber, passes through the optical fiber sensing region, is output from the other end of the single-mode optical fiber, and is detected by a spectrometer; when the refractive index of the external environment in contact with the magneto-optical material film changes, the change in the resonance peak wavelength in the MOKE spectrum of the sensor will be caused, and the sensing of the refractive index of the external environment is realized by detecting the resonance wavelength. Compared with the optical fiber SPR sensor, the application greatly improves the quality factor while maintaining high sensitivity, thereby improving the actual detection accuracy of the sensor.

Disclosed herein is an electric field measurement system that includes a light source, a light sensor configured to receive electromagnetic energy transmitted from the light source, an electro-optic sensor, and a controller. The electro-optic sensor include a package comprising an electro-optic crystal disposed and at least one optical fiber. The optical fiber is configured to transmit electromagnetic energy transmitted from the light source to a surface of the electro-optic crystal, and transmit at least a portion of the electromagnetic energy transmitted to the surface of the electro-optic crystal and subsequently passed through at least a portion of the electro-optic crystal to the light sensor that is configured to generate a signal based on an attribute of the electromagnetic energy received by the light sensor from the at least one optical fiber. The controller is configured to generate a command signal based on a signal received from the light sensor.