45 results about "Waveguide sensor" patented technology

The CSRR-based quarter substrate integrated waveguide sensor comprises a dielectric substrate, a square ring metal layer is arranged on the upper surface of the dielectric substrate, a lower metal layer is arranged on the lower surface of the dielectric substrate, and a row of metal holes are uniformly distributed in the circumferential direction of the square ring metal layer; the upper surface of the dielectric substrate is also provided with four triangular metal patches with different sizes, and each edge of the square ring metal layer is connected with one triangular metal patch; two concentric annular CSRRs are etched on the vertex angle, far away from the square ring metal layer, of the triangular metal patch. The sensor is novel in design, four mutually independent poles are generated, simultaneous multiband operation is realized, efficiency is improved, errors and loss are reduced, the size of the sensor is reduced by about 75% by adopting the QMSIW, and the sensor has the advantages of being small in size, easy to integrate, high in flexibility, low in loss and high in sensitivity.

The invention discloses a high-temperature pipeline magnetostrictive guided wave sensor and a monitoring method, and relates to the field of ultrasonic nondestructive testing. According to the sensor, a wrinkled iron-cobalt alloy belt is used as a sensitive element, and the sensor is in dry coupling contact with a to-be-detected pipeline; the high-temperature-resistant static magnetic field coil is wound on the outer side of the aluminum pre-tightening ring in a solenoid mode, and a bias pulse excitation mode is adopted. Alternately winding the bottom end of the wrinkle structure of the wrinkle-type ferrocobalt alloy belt and the back surface of the belt material, controlling the wrinkle-type ferrocobalt alloy belt to excite a guided wave signal in a pulse section, and receiving the guided wave signal in a bias section; the dynamic magnetic field and the static magnetic field generated by the two groups of coils are perpendicular in direction, and torsional mode guided waves are generated in the high-temperature pipeline based on the reverse Weidmann effect. The sensor is easy to install and stable in performance, the whole structure is resistant to high temperature for a long time, and the engineering problem of high-temperature failure is solved. The method provided by the invention comprises the steps of optimizing pre-tightening force, pulse voltage and bias current parameters, so that the transduction efficiency is improved, and the capability of detecting new defects of the pipeline in high-temperature and variable-temperature states is enhanced.

The invention provides a deformation detection method based on a soft optical waveguide mechanism, and relates to the technical field of computer processing, and the method comprises the following steps: S01, flexible optical waveguide sensors which are distributed at intervals are arranged in a to-be-detected area, and each flexible optical waveguide sensor at least comprises an elastic cladding and satisfies a Mooney-Rivlin hyperelastic model; the curvature of the bent section of the flexible optical waveguide sensor is dynamically associated with pipeline deformation, and the inclination angle # imgabs0 # of the flexible optical waveguide sensor is determined according to the relation between the deformation height # imgabs1 # and the straight section length # imgabs2 #. Through multi-physics field coupling modeling, material optimization design and a high-precision photoelectric conversion mechanism, and through high-sensitivity detection, strong environmental adaptability and long-term stability of deformation of the flexible optical waveguide sensor, the device has the advantages of low cost and easy deployment, and provides reliable technical support for pipeline safety monitoring.

The present invention provides a method and system for detecting crack defects in a balance beam of a crane, and relates to the technical field of defect detection. The method and system include arranging a plurality of ultrasonic guided wave sensor arrays on the surface of a balance beam of a crane to be detected, collecting ultrasonic guided wave signals inside the balance beam, and constructing a time-frequency domain feature vector of the ultrasonic guided wave of the balance beam; constructing a three-dimensional finite element simulation model of the balance beam of the crane, obtaining multiple groups of strain field data of crack defect expansion of the balance beam, and constructing a crack defect deformation ultrasonic-strain field fusion feature vector; using the crack defect deformation ultrasonic-strain field fusion feature vector to train a crack defect deformation detection intelligent discrimination model, obtaining the time-frequency domain feature vector and the strain distribution feature vector of the balance beam of the crane to be detected, inputting the trained crack defect deformation detection intelligent discrimination model into intelligent discrimination screening, and outputting the crack defect detection result of the balance beam to be detected, including the type, size, shape and specific position of the crack defect.

A point level switch for industrial interface detection is described, the switch including a microwave waveguide sensor in place of the more commonly encountered vibrating fork.

The application discloses a hemolysis analyzer based on an integrated optical waveguide sensor and a preparation method thereof, and comprises an integrated photon waveguide, a nano filter and a micro-fluidic channel, wherein the integrated photon waveguide is a single waveguide with a middle spiral type and coupling gratings on both sides. The hemolysis analyzer fully utilizes the advantages of high sensitivity and small volume of the integrated optical waveguide sensor, and realizes sample-free preparation by combining the methods of instantaneous absorption and hemoglobin filtration, and can quickly and accurately detect hemolysis and the degree of hemolysis.

A sensor unit having a coupling-in waveguide and a coupling-in unit which couples a state present on the coupling-in waveguide to a first waveguide and a second waveguide. The sensor unit includes a first coupling-out unit that couples in a state present on the first waveguide to a coupling waveguide and couples out a state present on the coupling waveguide to a first coupling-out waveguide. The sensor unit includes a second coupling-out unit which couples in a state present on the second waveguide to the coupling waveguide and couples out a state present on the coupling waveguide to a second coupling-out which couples with the coupling waveguide, and a detection unit including at least one detector for detecting states present at or output from the at least first and / or second coupling-out waveguide or states dependent on these states.

The invention relates to an optical waveguide sensor based on a cascaded phase-shift uniform Bragg grating, and the sensor comprises the cascaded phase-shift uniform Bragg grating which is provided with an input single-mode waveguide and an output single-mode waveguide. A plurality of phase-shift uniform Bragg grating units are arranged between the input single-mode waveguide and the output single-mode waveguide; the phase shift uniform Bragg grating unit comprises a phase shift cavity and periodic refractive index modulation structures symmetrically arranged on the two sides of the phase shift cavity. The optical waveguide structure of the phase shift uniform Bragg grating is not covered by an upper cladding. According to the invention, through the coupling design of cascaded multi-stage harmonic peaks, the quality factor and the detection precision are greatly improved, and the wavelength detection range is widened at the same time. The design without the upper cladding layer is combined with the single-step photoetching etching process, so that the complex process of growing the upper cladding layer or overlaying a sensing window is thoroughly omitted, and the manufacturing cost and the process complexity are greatly reduced.

The invention discloses an MIM waveguide sensor based on Fano resonance and an application method of the MIM waveguide sensor, and relates to the technical field of optical devices. A metal coating is plated on the substrate; a U-shaped resonant cavity is etched on the metal coating, and a metal-medium-metal MIM straight waveguide is etched below the U-shaped resonant cavity; wide-spectrum light enters from the left side of a straight waveguide and exits from the right side of the straight waveguide, and when resonance is excited, light beam energy corresponding to the resonance wavelength is coupled into a U-shaped resonant cavity, so that the transmissivity of the wavelength is reduced, and a transmission peak is formed; the sensor has a wide and stable low refractive index detection range.

Generally disclosed are rotor thrust balancing systems for turbomachinery and methods of using the same. For example, a rotor thrust balancing system for turbomachinery, where the turbomachinery defines a centerline extending a length of the turbomachinery. The system includes a rotating drive shaft, a thrust bearing, and a first waveguide sensor. The rotating drive shaft couples a turbine section and a compressor section of the turbomachinery. The thrust bearing supports the rotating drive shaft of the turbomachinery. The thrust bearing includes a plurality of ball bearings, an inner race coupled to the rotating drive shaft, and an outer race coupled to a fixed structure. The first waveguide sensor is coupled to the outer race at a first end of the waveguide sensor. The waveguide sensor transmits a vibration frequency from the thrust bearing to a second end of the waveguide sensor.

The invention discloses a vernier effect-based high-sensitivity polymer micro-ring temperature and humidity optical waveguide sensor, and belongs to the technical field of planar optical waveguide integrated devices. The polymer electrolyte consists of a substrate layer, a polymer lower cladding, a polymer grooving layer, a polymer electrolyte core layer and a polymer upper cladding. The polymer electrolyte core layer is of a runway type MRR cascaded optical waveguide structure and is composed of a reference ring, a temperature sensing ring and a humidity sensing ring, a polymer electrolyte core layer material can adsorb water molecules in air, the free ion concentration can change along with the change of humidity and temperature, and then the refractive index of the material changes; the temperature and humidity dual-mode sensing device overcomes the defects of integration level, sensitivity and interference resistance of an existing temperature and humidity sensing device, ultra-compact and ultra-high-sensitivity temperature and humidity dual-mode sensing is achieved, the optical waveguide device is made of polymer materials, and the temperature and humidity dual-mode sensing device has the remarkable advantages of being good in flexibility, simple in process, low in cost, high in efficiency and the like. The method is suitable for various scenes requiring precise environment control or real-time monitoring of tiny changes.

The invention relates to an optical waveguide sensor for detecting heavy metal ions in an aqueous solution and a manufacturing method thereof. An optical waveguide sensor includes a substrate surface having a uniform thin layer of ligands coupled thereto with a tin catalyst to form a functionalized substrate surface, where the optical waveguide sensor is configured to interact with an optical wave at an input of the optical waveguide sensor and an aqueous solution in contact with the functionalized substrate surface, the method further includes determining the concentration of the heavy metal ions in the aqueous solution, whereby the heavy metal ions in the aqueous solution form a coordination complex upon contact with a plurality of binding sites available on the functionalized substrate surface, thereby altering the material optical refractive index of the functionalized substrate surface, the alteration corresponding to the concentration of the heavy metal ions. Treating the surface of the substrate to enable the treated surface to couple to the ligand; coupling the treated substrate surface with the ligand to form a uniform thin layer of ligand on the substrate surface, thereby forming a functionalized substrate surface; and cleaning the functionalized substrate surface with dilute nitric acid wherein the coupling of the treated substrate surface with a ligand is carried out with a tin catalyst, the selection of the ligand varying depending on the type of substrate surface and the type of heavy metal ion to be detected.

The application discloses a kind of particulate matter block adaptive sensing module, robot and working method, and the sensing module includes acoustic sensing component, it includes base and microphone, base is opened with air extraction hole;Optical sensing component, it includes skin and optical waveguide sensor, skin covers on base, cavity is reserved between skin and base, air extraction hole is communicated to cavity;Optical waveguide sensor is arranged on skin with each other staggered;Fill granule, which is filled in cavity;Air extraction equipment is connected with air extraction hole.When there is external force to skin, fill granule can move in compliance with the shape of object exerting external force, while optical waveguide sensor can detect the position of external force and the deformation amplitude of skin;Air in cavity can be extracted using air extraction equipment to make fill granule adhere to each other, improve bearing capacity while making external vibration better transmitted to microphone, high-frequency vibration is detected by acoustic detection mode.

The invention relates to an interrogator system for interrogating fiber based sensors. The system comprises a broadband excitation light source illuminating a first lead fiber section having a wavelength shift response generating optical waveguide sensor, and a second lead fiber section having an in-line two reflectors based fiber interferometer sensor. The system also includes a detection 3 x 3 interferometer having an optical path difference arranged to match the wavelength shift response generating optical waveguide sensor and the in-line two reflectors based fiber interferometer sensor.

The invention provides an optical waveguide sensor, a wet and soft substance adhering and grabbing device based on a flexible optical waveguide and a control method of the wet and soft substance adhering and grabbing device based on the flexible optical waveguide. A camera base, a limiting copper column, a USB infrared camera, an electromagnet, a rotary guide rail, a vertical guide rail, a magnetic drive layer, an acrylic hard waveguide, an LED programmable controller, an infrared light source and a support are arranged in the sensor shell, and the wet and soft substance adhesion grabbing device comprises a UR5 mechanical arm, an electric clamping jaw and an optical waveguide sensor. Through the leakage light characteristic of the optical waveguide, the contact area and adhesion strength change of an adhesion interface can be monitored in real time, high-precision control and real-time feedback of the wet and soft matter grabbing process are achieved, magnetic field parameters can be dynamically adjusted according to the actual adhesion state, the debonding effect is optimized, intelligent control and precise and controllable debonding are achieved, and the grabbing efficiency of the wet and soft matter is improved. The problem of excessive debonding or insufficient debonding is avoided, and the target object is not prone to being damaged.

The optical waveguide sensor comprises, for example: a plurality of first waveguides each having a core at least partially surrounded by a cladding, the first waveguides guiding inspection light; and a contact surface on which the object to be inspected comes into contact and through which the exudation component of the inspection light guided by the first waveguides leaks, the amounts of leakage of the inspection light guided by the plurality of first waveguides from the contact surface being different from each other. The optical waveguide-type sensor may have a first surface located at an end in the first direction, the plurality of first waveguides extend so as to intersect the first direction, the optical waveguide-type sensor is provided with a receiving recess that is recessed from the first surface in a direction opposite to the first direction and that receives the object to be inspected, and the bottom surface of the receiving recess includes a contact surface.

The invention discloses a maglev train speed measurement positioning system and method. The system comprises a light source; the optical waveguide sensing array is arranged along the track and is coupled with the light source; the optical signal receiver is coupled with the optical waveguide sensing array; the optical waveguide sensing array comprises a plurality of optical waveguide sensors, and each optical waveguide sensor comprises a first optical fiber which is coupled with a light source and transmits a first optical signal through a first transmission optical cable; the second optical fiber transmits a second optical signal through a second transmission optical cable; the driving module drives the second optical fiber to move between the first position and the second position, and when the second optical fiber is located at the second position, the distance between the second optical fiber and the first optical fiber meets the condition that a light evanescent field is formed between the second optical fiber and the first optical fiber and optical coupling occurs, so that the second optical fiber generates a second optical signal; and the signal processing module demodulates the position and the running speed of the maglev train. The speed and the position of the magnetically levitated train can be calculated in the high-intensity magnetic field environment.

The present invention discloses a quarter-substrate integrated waveguide sensor based on CSRR. The sensor comprises a dielectric substrate, a square ring metal layer formed on the upper surface of the dielectric substrate, and a lower metal layer formed on the lower surface of the dielectric substrate. The square ring metal layer is evenly distributed with a row of metal holes. Four triangular metal patches of varying sizes are also formed on the upper surface of the dielectric substrate, one connected to each edge of the square ring metal layer. Two concentric ring-shaped CSRRs are etched on the top corners of the triangular metal patches away from the square ring metal layer. The sensor has a novel design, generating four independent poles, enabling simultaneous multi-band operation, improving efficiency, and reducing errors and losses. Using QMSIW, the sensor's size is reduced by approximately 75%, while also offering compact size, ease of integration, high flexibility, low loss, and high sensitivity.

An optical waveguide sensor includes: a plurality of first waveguides, each first waveguide including a core at least partially enclosed by a cladding and being configured to guide an examination light; and a contact surface with which an examination subject is in contact and from which leaks seeping component of the examination light guided by the first waveguides. The examination light guided by the plurality of first waveguides has mutually different amount of leakage from the contact surface.

The present invention relates to a method for forming an optical waveguide sensor for detecting arsenic ions in an aqueous solution. The method comprising the steps of treating a substrate with solvents, coating the treated substrate surface with a crosslinking agent selected from a group comprising carboxylic acid functional group containing organic molecules for forming a crosslinked substrate surface, coating the crosslinked substrate surface with a ligand comprising an amine functional group and mercaptan functional group for forming a functionalized substrate surface containing a layer of ligand surface, and complexing the layer of ligand surface with a solution containing iron ions for forming a functionalized substrate surface containing layer of ligand surface containing iron ion cores that is capable of binding with arsenic ions in an aqueous solution. The present invention also relates to the optical waveguide sensor for detecting arsenic ions fabricated with the method of the present invention.

An optical waveguide sensor includes: a core that extends in a given direction and that guides examination light; a cladding that has a refractive index lower than the core and that surrounds at least part of a circumference of the core; and a groove that is positioned on a side of the core in a first direction such that an oozing component of the examination light that is guided by the core leaks, an end face of the groove being positioned on a side of a second direction orthogonal to the first direction with respect to an end of the core.

The present application discloses a speed measurement and positioning system and method for a maglev train. The system includes: a light source; an optical waveguide sensing array arranged along the track and coupled to the light source; an optical signal receiver coupled to the optical waveguide sensing array; the optical waveguide sensing array includes a plurality of optical waveguide sensors, and the optical waveguide sensor includes: a first optical fiber, the first optical fiber is coupled to the light source and transmits a first optical signal through a first transmission optical cable; a second optical fiber, which transmits a second optical signal through a second transmission optical cable; a driving module drives the second optical fiber to move between a first position and a second position. When the second optical fiber is in the second position, the distance between the second optical fiber and the first optical fiber satisfies: an optical evanescent field is formed between the second optical fiber and the first optical fiber and optical coupling occurs, so that the second optical fiber generates a second optical signal; a signal processing module, and the signal processing module demodulates the position and running speed of the maglev train. The present application can calculate the vehicle speed and position of the maglev train in a strong magnetic field environment.

The invention discloses a groove-type micro-ring resonant cavity sensor, and relates to the field of optical waveguide sensors, the sensor comprises a coupling area integrated with an S-shaped bent waveguide and a groove-type micro-ring resonant cavity formed by a groove-type waveguide formed by waveguide ridges, and the groove and the cavity of the groove-type micro-ring resonant cavity are filled with an aqueous solution with a negative thermo-optical coefficient as an upper cladding. According to the invention, the optical coupling efficiency is optimized through the design of the S-shaped bent waveguide, and the energy of an optical field is highly converged in the groove, so that the interaction efficiency of light and a to-be-detected substance is improved, and the sensing sensitivity of the sensor is improved; meanwhile, the negative thermo-optic effect of the aqueous solution is utilized to accurately compensate the positive thermo-optic effect of silicon and silicon dioxide, so that the effect that the change rate of the effective refractive index to the temperature tends to zero is achieved, the sensing sensitivity of the sensor is further improved, and the problem that in a traditional scheme, sensing sensitivity improvement and temperature drift suppression contradict with each other is effectively solved.

The invention discloses a flexible conjugate double-curvature optical waveguide sensor and an application method of the flexible conjugate double-curvature optical waveguide sensor in flexible joint measurement. The flexible conjugate double-curvature optical waveguide sensor comprises two sensing assemblies and a flexible substrate, wherein each sensing assembly comprises a double-curvature optical waveguide, a flexible coating layer, a light emitting device and a light intensity detection device; for each sensing assembly, the light-emitting device and the light intensity detection device are installed at the two ends of the double-curvature optical waveguide respectively, and the outer side of the double-curvature optical waveguide is evenly wrapped with the flexible wrapping layer. The two sensing assemblies are attached to the upper surface of the flexible base body side by side and can deform along with deformation of the base body, and the installation direction of the sensing assemblies is the same as the direction of the flexible base body. According to the flexible conjugate double-curvature optical waveguide sensor and the application method of the flexible conjugate double-curvature optical waveguide sensor in flexible joint measurement, the influence of transverse bending deformation of the sensor on longitudinal tension and compression deformation measurement is effectively reduced, and the tension and compression and omnidirectional bending deformation of the flexible joint can be measured at the same time; and the precision and comprehensiveness of the measurement function of the sensor are ensured.

The invention provides an optical waveguide sensor, a preparation method and device thereof and a detection method. The optical waveguide sensor comprises a coupling module and an interference module. The coupling module comprises a first coupler and a second coupler, and the interference module is located between the first coupler and the second coupler; the interference module comprises a sensing arm and a reference arm; the first output end of the first coupler is connected with the first end of the sensing arm, and the second output end of the first coupler is connected with the first end of the reference arm; the first input end of the second coupler is connected with the second end of the sensing arm, and the second input end of the second coupler is connected with the second end of the reference arm; wherein the sensing arm comprises a first nonlinear tapered waveguide structure, a first spot-size conversion waveguide structure, a sensing waveguide structure, a second spot-size conversion waveguide structure and a second nonlinear tapered waveguide structure which are sequentially and adjacently arranged; according to the optical waveguide sensor provided by the invention, the detection precision of the sensor is effectively improved by designing a plurality of waveguide structures on the sensing arm.

The invention discloses an integrated optical waveguide three-dimensional direct-current electric field sensor, belongs to the technical field of electric field measurement and sensing, and aims to solve the problem that an existing optical waveguide direct-current electric field sensor can only perform one-dimensional measurement and cannot synchronously sense components of a three-dimensional direct-current electric field. According to the technical scheme, the optical waveguide sensor comprises a packaging shell, a three-dimensional six-equal-part shielding sheet, three optical waveguide sensors with the same specification, a 30-degree arc-shaped copper block, a direct-current motor, a battery and the like. The three optical waveguide sensors are respectively arranged in x-axis, y-axis and z-axis grooves of the packaging shell, and the sensitive directions are pairwise orthogonal; the three-dimensional six-equal-part shielding sheet is installed on a direct-current motor shaft, the motor, the battery and the ship-shaped switch form a loop to drive the ship-shaped switch to rotate, the arc-shaped copper block assists shielding, and the optical fiber is led out from the bottom of the shell. The sensor depends on a three-dimensional shielding sheet stereo structure, can synchronously and periodically shield electrodes in three directions, so that the sensor can synchronously sense a three-dimensional electric field component, vector measurement of a direct-current electric field in any direction is further realized, and the high-precision measurement requirement of the three-dimensional electric field is met.

The invention relates to the field of sensors, and provides an optical waveguide sensor based on a cascade micro-ring structure, which comprises a silicon-based substrate layer, a lower cladding, a waveguide core layer and an upper cladding which are sequentially stacked from bottom to top, the waveguide core layer comprises a first optical waveguide, a first micro-ring resonator, a second optical waveguide, a third optical waveguide, a fourth optical waveguide, a second micro-ring resonator, a fifth optical waveguide and optical couplers which are respectively used as a first input port, a first output port, a second input port and a second output port; wherein an optical signal is input from the first input port and is output to the spectrograph from the first output port; or the optical signal can also be input from the second input port and output to the spectrograph from the second output port. By detecting the output spectrum of the common waveguide in the cascaded micro-ring structure, the spectrum slope can be greatly improved, and the sensing sensitivity is enhanced.

Waveguide and / or antenna structures for use in RADAR sensor assemblies and the like. In some embodiments, the assembly may comprise a waveguide block comprising a first surface on a first side of the waveguide block and a second surface on a second side of the waveguide block opposite the first side. One or more waveguides may be formed in the waveguide block. One or more antenna slots may be operably coupled with one or more of the waveguides. One or more auxiliary grooves may be positioned adjacent to at least one of the antenna slots and may mimic, or at least substantially mimic, at least one of the one or more antenna slots, such as in length and / or width.

The present invention relates to a method for forming an optical waveguide sensor for detecting ions containing radioactive isotopes in an aqueous solution. The method comprises treating a substrate surface by cleaning the substrate surface with one or more solvents to enable coating with a crosslinking agent, the substrate being selected from silica or silicon substrate, coating the treated substrate surface with the crosslinking agent selected from carboxylic acid functional group containing organic molecules to form a crosslinked substrate surface, coating the crosslinked substrate surface with a scintillating agent, and coating the substrate surface with a ligand capable of reacting with a radioactive isotope in an aqueous solution to form a functionalized substrate surface. The present invention also relates to the optical waveguide sensor for detecting radioactive isotopes fabricated with the method of the present invention.