36 results about "Waveguide sensor" patented technology

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 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 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 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 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 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.

The high-sensitivity polymer micro-ring temperature and humidity optical waveguide sensor based on the vernier effect belongs to the technical field of planar optical waveguide integrated devices. The high-sensitivity polymer micro-ring temperature and humidity optical waveguide sensor is composed of a substrate layer, a polymer lower cladding layer, a polymer groove layer, a polymer electrolyte core layer and a polymer upper cladding layer. The polymer electrolyte core layer is a light waveguide structure of a runway type MRR cascade, which is composed of a reference ring, a temperature sensing ring and a humidity sensing ring. The polymer electrolyte core layer material can absorb water molecules in the air, the free ion concentration in the material can change with the change of humidity and temperature, and then the refractive index of the material changes. The high-sensitivity polymer micro-ring temperature and humidity optical waveguide sensor solves the problems of the existing temperature and humidity sensor devices, such as the insufficient integration, sensitivity and anti-interference, realizes the ultra-compact and ultra-high sensitivity temperature and humidity dual-mode sensing, and has the advantages of good flexibility, simple process, low cost, high efficiency and the like. The high-sensitivity polymer micro-ring temperature and humidity optical waveguide sensor is suitable for various scenes which need to precisely control the environment or monitor the real-time change.

The present invention relates to a deformation detection method based on a soft optical waveguide mechanism, and relates to the field of computer processing technology. The method comprises the following steps: S01, deploying spaced flexible optical waveguide sensors within the area to be measured, wherein: the flexible optical waveguide sensors include at least an elastic cladding and satisfy the Mooney-Rivlin hyperelastic model; the curvature of the curved section of the flexible optical waveguide sensor is dynamically correlated with pipeline deformation, and its inclination angle #imgabs0# is determined by the relationship between the deformation height #imgabs1# and the straight section length #imgabs2#. Through multi-physics field coupling modeling, material optimization design, and high-precision photoelectric conversion mechanisms, this invention provides reliable technical support for pipeline safety monitoring by combining the high sensitivity of flexible optical waveguide sensors for deformation detection, strong environmental adaptability, and long-term stability, while also offering the advantages of low cost and easy deployment.

The invention relates to a system and method for identifying the concentration of a gas using the photoacoustic effect. The system comprises a gas cell for containing a gas sample, an excitation light source with amplitude and / or wavelength modulation that emits light matching an absorption line of the target gas, an optical waveguide sensor adjacent to the gas cell for measuring acoustic pressure, and a processing unit to determine gas concentration from the acoustic pressure. The method involves placing the gas sample in the gas cell, directing modulated light into the cell, inducing a photoacoustic effect by the interaction of light and gas, measuring acoustic pressure via the optical waveguide sensor, and using the processing unit to determine the gas concentration. This system and method enable precise and efficient gas identification based on photoacoustic signals.

The optical waveguide sensor includes, for example, a core extending in a predetermined direction and guiding inspection light; a cladding layer having a lower refractive index than the core and surrounding at least a portion of the outer periphery of the core; and a groove portion which is located in a first direction of the core so as to leak out an exudation component of the inspection light guided by the core, the groove portion having an end surface located further toward a second direction side than an end portion of the core, the second direction side being orthogonal to the first direction. In the optical waveguide sensor, the groove portion may have an inspection region in which the distance between the core and a surface located on the first direction side of the core is equal to or less than a threshold value. This makes it possible, for example, to provide a newly improved optical waveguide sensor and spectral analysis element that can further improve production accuracy.

The invention discloses a plasma double-resonance waveguide sensor based on nanometer antenna assistance, which comprises a substrate, a waveguide and a plasma resonator, the plasma resonator, the waveguide and the substrate are stacked from top to bottom, the waveguide is used for accessing and transmitting two optical signals with different wavelengths, and the waveguide is used for receiving and transmitting the two optical signals with different wavelengths. The plasma resonator can realize localized surface plasma resonance when the two optical signals are input into the waveguide, the plasma resonator is realized by adopting a gold nanorod array, the gold nanorod array is formed by uniformly distributing 2N gold nanorod units at intervals according to a mode of 2 rows and N columns, N is an integer greater than or equal to 1, and N is an integer greater than or equal to 1. Each gold nanorod unit comprises four gold nanorods which are distributed at intervals, and a nanoscale I-shaped gap structure is formed among the four gold nanorods; the device has the advantages that the structure is simple, the detection of the characteristics of the two substances can be realized, and the detection precision of the characteristics of the two substances is higher.

The utility model relates to the technical field of soft manipulators, in particular to a flexible optical waveguide soft manipulator for underwater application and a die. The flexible optical waveguide soft hand comprises a soft actuator body, a connecting seat and a flexible optical waveguide sensor, a soft hand cabin is arranged in the soft actuator body, and the soft actuator body can be bent after the soft hand cabin is inflated or filled with liquid; two flexible optical waveguide sensors are arranged on the two sides of the soft actuator body respectively and used for sensing bending of the soft actuator body. The connecting base is arranged at the rear end of the soft actuator body and used for being connected with external equipment. The flexible optical waveguide soft hand can sense the bending of the fingers, and the efficiency of the soft hand for executing the operation task in the underwater complex environment is improved.

The invention discloses a branched chain sensing rope suspension parallel robot embedded with optical waveguide sensing, and belongs to the field of parallel robots. Comprising a rack, and a lead screw nut seat capable of ascending and descending and a fixed platform fixed in position are arranged on the rack; a plurality of supporting seats which are uniformly distributed in the circumferential direction are hinged to the fixed platform, and an umbrella stand connecting rod is hinged between the lead screw nut seat and each supporting seat; a supporting seat is arranged on the fixed platform, a sliding block capable of sliding in the length direction of the supporting seat is arranged on the supporting seat, a movable platform is arranged below the fixed platform, a fiber-reinforced optical waveguide sensor is arranged between the movable platform and the sliding block, and the two ends of the fiber-reinforced optical waveguide sensor are connected with the movable platform and the sliding block through universal joints respectively. A Kevlar fiber tube is arranged on the outer side of a fiber core of the sensor, the inner side and the outer side of the Kevlar fiber tube are filled with silica gel, and an LED and a PD are arranged at the two ends of the fiber core respectively. A sensor is used for replacing a traditional rope to form an optical waveguide rope, and the parallel robot is endowed with the large-range tactile perception capacity.

The invention discloses a particulate matter blocking self-adaptive sensing module, a robot and a working method, the sensing module comprises an acoustic sensing assembly, the acoustic sensing assembly comprises a base and a microphone, and the base is provided with an air exhaust hole; the optical sensing assembly comprises a skin and an optical waveguide sensor, the skin covers the base, a cavity is reserved between the skin and the base, and the air exhaust hole is communicated to the cavity; the optical waveguide sensors are arranged on the skin in a mutually staggered manner; the cavity is filled with the filling particles; and the air exhaust equipment is connected with the air exhaust hole. When an external force is applied to the skin, the filling particles can move in accordance with the shape of an object to which the external force is applied, and meanwhile, the optical waveguide sensor can detect the position of the external force and the deformation amplitude of the skin; air in the cavity is pumped away through the air pumping device, the filling particles can be tightly attached to one another, the bearing capacity is improved, meanwhile, external vibration can be better transmitted to the microphone, and high-frequency vibration is detected in an acoustic detection mode.

The present invention discloses an integrated thermocouple waveguide sensor system with one or more of compatible wave propagation mediums joined at one junction with at least one ultrasonic energy transducer on at least one open end of one or more wave guides and a method using the integrated thermocouple waveguide sensor system with arrangement of at least one waveguide thermocouple for integrated measurement of multiple and simultaneous physical properties of the waveguide material itself and that of the surrounding media using the Seebeck phenomena and the ultrasonic guided wave phenomena. The surrounding media properties and waveguide material properties are measured based on the ultrasonic waveguide parameters and the temperature is measured by the thermocouple.