77 results about "Plastic optical fiber" patented technology

The invention provides a well drilling anti-interference communication system based on a VCSEL (Vertical Cavity Surface Emitting Laser), the VCSEL and a manufacturing method thereof, and the manufacturing method comprises the following steps: calculating the light field intensity distribution of a high-order transverse mode through an intrinsic mode expansion method and a Laguerre-Gaussian model based on the epitaxial structure parameters of a laser; determining a target area which begins to perform downward annular etching on the surface of the p-DBR layer, wherein the target area coincides with a light field intensity peak area of the high-order transverse mode; performing annular etching in the target area to form an annular groove, and etching at least seven pairs of p-DBR layers inwards in the groove; the communication system comprises a signal transmitting end arranged on the derrick side, and the signal transmitting end is provided with the vertical cavity surface emitting laser; the p-DBR region of the vertical cavity surface emitting laser is provided with an annular etching structure; the graded-index fluorinated plastic optical fiber is used as a transmission medium and is connected with the derrick side and the logging room side; and the optical signal receiving end is arranged at the logging room side and is used for receiving and converting the optical signal into an electric signal.

The present invention relates to the technical field of plastic optical fiber production equipment. Disclosed is an extrusion device for production and processing of plastic optical fibers with uniform discharge. The extrusion device comprises a main body and an outlet mechanism, wherein the outlet mechanism is arranged at the bottom of the main body, a placement mechanism is provided at the bottom of the main body, and a material tank is provided inside the main body. The extrusion device further comprises an extrusion mechanism, which is arranged inside the material tank and comprises an extrusion block, wherein the extrusion block is slidably connected into the material tank, the outer surface of the extrusion block abuts against the inner wall of the material tank, and a movable slot is provided at the bottom of the extrusion block. In the present invention, by means of connecting a material injector to the top of a filling pipe, a flowing material can be injected into the material tank through a filling port; moreover, and by means of connecting a hydraulic cylinder to a limiting plate, the extrusion block is driven to extrude the material inside the material tank, thereby realizing a production and processing process of plastic optical fibers by means of extrusion of the material inside the material tank.

The invention discloses an optical interconnection system which comprises a light source, a transmission medium and a photoelectric detector. The light source adopts a micro resonant cavity light-emitting diode array, and the transmission medium adopts a multi-core plastic optical fiber. An optical signal output by the micro resonant cavity light emitting diode array is transmitted to the photoelectric detector through the multi-core plastic optical fiber and is converted into an electric signal through the photoelectric detector. The light source of the optical interconnection system provided by the embodiment of the invention adopts the micro resonant cavity light-emitting diode array, the transmission medium adopts the multi-core plastic optical fiber, and good balance among low power consumption, high stability and high parallelism can be achieved through component optimization.

The invention provides a multifunctional tactile sensor based on a double-taper-region plastic optical fiber and a preparation method thereof.According to the sensor, the middle of a PMMA plastic optical fiber is made into a taper through the fused biconical taper technology, and after tapering, an input optical fiber, a first taper region, a micro optical fiber, a second taper region and an output optical fiber which are sequentially connected from left to right are formed; a coating layer of polyester resin NOA 144 is arranged on the periphery of the second conical region; and the peripheries of the first conical region, the micro optical fiber and the second conical region are also packaged in an elastic cladding of PDMS (Polydimethylsiloxane). According to the sensor, force measurement and sliding direction identification can be carried out, the square distribution of a sensing area can be directly changed through the diameter of the micro optical fiber and the length of the conical area, and therefore the sensitivity of the sensor and the accuracy of pressure measurement are remarkably influenced. And the cone region is obtained by adopting a fused biconical taper technology, the manufacturing process is simple and convenient, the manufacturing cost is low, the device integration degree is relatively high, the stability is strong, and the device has relatively great competitiveness and application prospects in the fields of tactile sensing, medical operation and the like.

The invention discloses a camera shooting control method and device using an optical fiber signal, equipment and a medium. After the system is powered on, the upper computer sends control commands such as communication and triggering, the control commands are converted into optical signals through the electro-optical conversion module, the optical signals are sent to controlled equipment (including a camera unit, a light source unit and an aperture unit) through optical fibers (plastic optical fibers and silica optical fibers), the optical signals are converted into electric signals through the photoelectric conversion module, and the system works based on the control commands. Operation such as camera exposure, light source flashing and aperture opening and closing is achieved, and ideal control states of good image sensitization, light source synchronization and moderate aperture are achieved. Compared with a traditional control mode that electric signals are transmitted through cable media, optical signals are transmitted through the optical fiber media, the electromagnetic interference influence can be reduced, the transmission distance is longer, the cable weight is lighter, the error control probability is reduced, and the overall system robustness is effectively improved.

The invention relates to the technical field of high-power microwave effect tests and testing, and particularly provides an automatic edge AI judgment method and device for an HPM damage grade, and the method comprises the steps: synchronously obtaining electric field, temperature and FBG reference data through a conformal optical fiber sensor array and a reference sensor in a test body; and the optical fibers are reinjected to the outside of the shielding cabin in a zero-metal manner in a lossless manner through a plastic optical fiber-CAN-FD link. Voxelization, multi-modal fusion and INT8 quantization processing are carried out on the data on an outboard edge computing device, and a standard input tensor is generated. And a damage grade judgment model deployed on the equipment is used for reasoning, and a damage grade judgment result and confidence are output. Optionally, the model may also output a thermodynamic diagram identifying the critical space region. According to the method, the AI model is locally deployed through the edge computing device, multi-dimensional sensing data are fused, real-time efficient judgment of the HPM damage level is achieved, and meanwhile the consistency and objectivity of the judgment result are remarkably improved.

The invention relates to an electric field visualization real-time monitoring system and method, belongs to the technical field of electric field visualization, and is used for solving the problems of insufficient real-time performance, large measurement interference, incomplete imaging, weak multi-user cooperation and lack of unified time reference in the prior art. The method comprises the following steps: acquiring electric field scattering data of a test body by a conformal optical fiber electric field sensor array, transmitting the electric field scattering data to an edge GPU node through a plastic optical fiber-CAN-FD link, and converting the electric field scattering data into electric field amplitude data; the edge GPU node is combined with WebGL3D texture mapping and a volume ray casting algorithm to complete volume rendering, and multi-user concurrent interaction is realized through a Web server and a browser client; and a White-Rabbit clock architecture is adopted to provide a unified time reference for the whole process. According to the method, dynamic and accurate capturing of the electric field is achieved, and the multi-user concurrent access requirement is effectively met.

The invention provides a non-inductive fatigue pressure monitoring cushion system and method based on multi-mode optical fiber sensing. Relates to the technical field of health monitoring and medical instruments, and comprises an optical fiber multi-mode sensing layer which is embedded in a cushion foaming elastomer, forms a two-dimensional sensing grid by staggered Bragg grating array optical fibers and micro-bend loss plastic optical fibers, and is used for collecting heart and lung micro vibration signals and body pressure distribution-micro body movement signals; and the optical signal conditioning and synchronous acquisition unit is coupled with an optical path of the optical fiber multi-mode sensing layer and is used for carrying out amplitude-phase demodulation and temperature drift compensation on optical fiber reflection / transmission light and digitally outputting multichannel original data. The non-inductive fatigue pressure monitoring cushion system and method based on multi-mode optical fiber sensing have the advantages of noninvasive comfort, high-precision recognition, self-adaptive intervention, low power consumption, long endurance and the like, and an accurate and continuous fatigue and pressure management solution is provided for sedentary people.

The invention provides a light-splitting optical fiber of an operation illumination system, and relates to the technical field of medical illumination, the light-splitting optical fiber comprises a light-emitting assembly and an optical fiber body, the light-emitting assembly is used for generating a linear light beam, a first end of the optical fiber body is dispersed into a plurality of optical fiber bodies, protective sleeves are arranged on the outer sides of the optical fiber bodies, and transparent coating end heads are arranged at the end parts of the optical fiber bodies; a connector assembly is fixedly arranged at the second end of the optical fiber body. The light-emitting assembly and the optical fiber body are adopted to form a medical illumination system, the optical fiber body is a single-strand plastic optical fiber, the light-emitting assembly generates a linear light beam, the light beam is transmitted to the other end along the optical fiber body, and the use requirement of medical illumination can be met; and the cost of the single-strand plastic optical fiber is low, the single-strand plastic optical fiber is not easy to break during bending adjustment, and the comprehensive benefit brought by specific application is high.

The invention discloses an arc light online monitoring device for an energy storage power distribution switch cabinet, and belongs to the technical field of arc fault monitoring. Comprising a monitoring unit and a collecting unit, a quartz window short horn mouth captures 2pi spherical degree arc light at a time, and a closed plastic optical fiber sends a pulse into an integrating sphere within 50 microseconds; a black body extinction cylinder-narrow band filter-integrating sphere multi-stage attenuation is carried out, strong light is weakened firstly, then an ultraviolet characteristic spectrum is extracted, flash of a background lamp and a camera is completely eliminated, arc light position offset still keeps stable output, and high signal-to-noise ratio identification is realized; a real arc is judged according to the ratio of pure arc light to total light, and interference is avoided; after confirmation, a level in direct proportion to energy is output immediately, a background acts according to a three-level strategy of prompting, tripping and quick breaking, no optical cable is exposed in the whole process, the whole process is not influenced by dust condensate water, a closed loop from arcing to protection decision is completed within 2 ms, and real-time, reliable and maintenance-free arc light online monitoring is provided for an energy storage power distribution switch cabinet.

This application relates to the field of plastic optical fiber technology, and in particular to a method for fabricating polymer optical fibers and polymer optical cables. In the embodiments of this application, the cladding of the polymer optical fiber can be divided into multiple ring-shaped stacked structures arranged sequentially from the inside to the outside along the radial direction of the optical fiber. At least two adjacent stacked structures in the multiple ring-shaped stacked structures are stacked to form several cavities, with each cavity spaced apart. In the fabrication method of this polymer optical fiber, a layered co-extrusion process is used to extrude the prefabricated stacked structure corresponding to each layer of the multi-layered stacked structure layer by layer. At least two adjacent prefabricated stacked structures in the multi-layered prefabricated stacked structure are stacked to form several spaced prefabricated cavities. Therefore, an optical fiber preform with prefabricated cavities can be obtained through the layered co-extrusion process. After the optical fiber preform is drawn, the prefabricated cavities correspond to the cavities of the polymer optical fiber, thereby obtaining the polymer optical fiber.

This application relates to a device and method for achieving eye tracking based on plastic optical fiber, belonging to the field of eye movement tracking technology. The device includes an acquisition module and a processing module. The acquisition module includes glasses and an optical fiber. The glasses include a frame. One end of the optical fiber is connected to the frame and the end is coated with an isolation layer. The optical fiber segment where the optical fiber contacts the frame is provided with a polishing area. When the tester wears the glasses, the polished surface of the polishing area faces the same direction as the tester's eye when looking straight ahead. The processing module includes an industrial camera and a server. The input end of the industrial camera is connected to the other end of the optical fiber, and the output end of the industrial camera is connected to the server. The industrial camera is used to generate a speckle signal. The server stores an eye movement recognition model, and the server obtains eye tracking results based on the speckle signal and the eye movement recognition model. This application has the effect of reducing the weight of the eye tracking equipment and improving the quality of eye tracking.

The invention provides a plastic optical fiber connection device with a data transmission function, and relates to the technical field of optical fiber connectors. The plastic optical fiber connection device with a data transmission function comprises an optical transceiver, four positioning pins are fixed on the surface of the optical transceiver, two S-shaped connectors are arranged on the surface of the optical transceiver, and the two S-shaped connectors are buckled with each other and embraced on the surface of the optical transceiver, and the S-shaped connectors are snap-connected with the positioning pins on the optical transceiver through positioning holes. The invention utilizes the characteristic that the plastic optical fiber itself can be bent at a large arc to design a safety connector that is not easy to loosen, adopts an S-shaped structure physical device to lock the plastic optical fiber, and utilizes the characteristic that the plastic optical fiber transmits signals through visible light to design a safety locking structure that can simply identify the locking state, without tools or preforming, and ensures both the arbitrary cutting characteristic of the plastic optical fiber and the data transmission stability.

The invention relates to the field of cascade optical fiber sensing, in particular to an intelligent identity recognition access control system based on cascade optical fiber sensing and a recognition method of the intelligent identity recognition access control system. The access control system comprises a light source module, a plastic optical fiber module, a cascade optical fiber sensing module, a detection demodulation module, a signal processing module and an upper computer module; the light source module is used for generating a broadband light signal; the plastic optical fiber module is used for transmitting broadband optical signals generated by the light source module to the cascade optical fiber sensing module, the cascade optical fiber sensing module is arranged on the surface of the access control handle, and when a user makes contact with the cascade optical fiber sensing module, vibration, temperature and stress at the position where the user makes contact with the cascade optical fiber sensing module can be detected; the detection module is used for detecting a contact signal at a position corresponding to a hand contacted by a user during unlocking, converting the contact signal into an optical signal and transmitting the optical signal to the detection demodulation module; according to the invention, intelligent identity recognition can be realized, the detected data polarization state is stable and mutually independent, and the accuracy is high.

A plastic optical fibre and an optical fibre transmission system are provided. The plastic optical fibre comprises a fibre core (110) and a cladding layer (120); the cladding layer circumferentially wraps the fibre core, and the fibre core and the cladding layer are both made of a non-PFAS plastic material. The present application further provides an optical fibre transmission system, which is used for a vehicle lamp lighting system.

The endoscope illumination system comprises a reuse part and a disposable part which are connected with each other, the reuse part comprises at least one laser light source, a coupling device and a high-temperature-resistant light guide device, and the disposable part comprises at least one plastic optical fiber, an operation part and a light diffusion device; light emitted by the laser light source is coupled by the coupling device and enters the high-temperature-resistant light guide device; the high-temperature-resistant light guide device is connected with the plastic optical fiber, so that light is conducted to the plastic optical fiber from the high-temperature-resistant light guide device, and the biological tissue is illuminated through the light diffusion device. The endoscope illumination system is low in cost, stable, reliable, suitable for disposable endoscopes, good in imaging effect and capable of achieving various illumination schemes such as white light illumination and multispectral illumination, and the illumination effect is consistent with that of repeated endoscopes.

The invention relates to the technical field of optical fiber manufacturing, in particular to a plastic optical fiber rapid surface scalding processing device which comprises a base, a surface scalding mechanism, a cleaning mechanism and a collecting mechanism, sliding grooves are symmetrically formed in the base, sliding blocks are slidably connected into the sliding grooves, and an output shaft of an air cylinder is fixedly arranged on one side of each sliding block. The buckle of the second sliding table is connected with the first sliding table in a buckled mode so that the flexible plastic optical fiber can be fixed by the first sliding table and the second sliding table, the surface of the flexible plastic optical fiber is subjected to heat treatment through the surface ironing mechanism, and then the cleaning mechanism and the collecting mechanism are linked to clean a heat conduction plate and collect residues in a unified mode. And the cleanliness of the working area is kept while residues are thoroughly separated from the working area, the collected residues can be recycled again, and the working efficiency and the environmental protection performance of the whole plastic optical fiber ironing processing device are effectively improved.

The utility model relates to a colored plastic optical fiber, which belongs to the technical field of plastic optical fibers and comprises a plastic optical fiber sleeve, an optical fiber component is mounted on the inner side of the plastic optical fiber sleeve, and a protective component is mounted on the outer side of the plastic optical fiber sleeve. The protection assembly comprises a sliding sleeve fixed to the outer side of the plastic optical fiber sleeve, an anti-corrosion sleeve fixed to the outer side of the sliding sleeve, a bending-resistant sleeve fixed to the outer side of the anti-corrosion sleeve, a color sleeve fixed to the outer side of the bending-resistant sleeve, and a wear-resistant sleeve fixed to the outer side of the color sleeve. According to the colored plastic optical fiber, the overall protection, wear resistance, weather resistance and corrosion resistance can be improved while the colored illumination and decoration function can be achieved, so that the colored plastic optical fiber can be normally and stably used for a long time, the situation of abrasion deformation is not prone to occurring, and the overall decoration attractiveness degree is conveniently guaranteed; therefore, the practicability of the colored plastic optical fiber is effectively improved.

The utility model discloses a Bluetooth leather sheath keyboard integrating mistaken touch prevention touch keys and a touchpad, which comprises a keyboard main body arranged on a leather sheath, the keyboard main body comprises an upper shell and a bottom shell, a PCBA (Printed Circuit Board Assembly) main board is attached to the inner surface of the upper shell, and the bottom shell is attached to the outer surface of the upper shell. A touch panel and a plurality of honeycomb-shaped touch keys are arranged on the upper shell right above the PCBA main board, touch chips corresponding to the touch keys and the touch panel are integrated on the upper surface of the PCBA main board, and backlight assemblies used for emitting light are further annularly arranged on the peripheries of the touch keys. The backlight assembly comprises a light-emitting part and a honeycomb-shaped plastic optical fiber, and the periphery of the touch key is sunken downwards to form a groove matched with the plastic optical fiber. The touch key is adopted to replace a traditional mechanical key, the touch panel and the key core can share one PCBA mainboard, the functions of the key core, the backlight panel, the mainboard and the touch panel can be integrated on one board to be completed, in this way, the assembling process can be simplified, errors can be avoided, and cost can be saved.

This invention relates to the field of plastic optical fiber weaving technology, specifically to plastic optical fiber weaving, weaving device, and weaving method for interior lighting of new energy vehicles. The invention includes: a machine base, and guide wheels rotatably mounted on the side wall of the machine base. Symmetrically distributed receiving plates are provided on the machine base, and guide holes are formed on the receiving plates. A translation component is disposed on the machine base, and symmetrically distributed connecting plates are connected to the translation component. A follow-up lifting mechanism is disposed on the connecting plates, and a clamping block is connected to the follow-up lifting mechanism. An alternating guide mechanism is provided within the clamping block. The follow-up lifting mechanism can control the clamping block to reciprocate vertically when the connecting plates move, and performs alternating locking actions on the clamping block through the alternating guide mechanism, thereby performing winding and weaving processing on the plastic optical fiber.

The described apparatus comprises: a power conversion unit having a plurality of power stages, each power stage comprising one or more MOSFET modules, one or more gate drive units arranged to drive MOSFETs in the MOSFET modules, thereby enabling electrical power conversion by MOSFET switching; a control unit arranged to receive one or more control signals indicative of a characteristic of the required electrical power conversion and to receive the measured physical parameter from the power stage and to generate a gate drive signal for the gate drive unit to control the MOSFET, each power stage is coupled to the control unit via a single respective upstream plastic optical fiber and a single respective downstream plastic optical fiber, each power stage comprising an upstream optical fiber interface and a serializer arranged to serialize the measured physical parameters for transmission to the control unit via the upstream plastic optical fiber, for each power stage, the upstream plastic optical fiber being coupled to the control unit via a single respective upstream plastic optical fiber and a single respective downstream plastic optical fiber. The control unit comprises a downstream fiber optic interface and a serializer arranged to serialize a gate drive signal of the power stage for transmission over a downstream fiber optic via the downstream fiber optic interface. A vehicle and method are also described.

The invention discloses a plastic optical fiber noodle ironing machine, and relates to the technical field of plastic optical fibers, the plastic optical fiber noodle ironing machine comprises a base, the outer surface of the base is fixedly provided with a controller, the top of the base is fixedly connected with a square plate, and the side, close to the edge of the base, of the square plate is fixedly provided with a guide device; a placing plate is fixedly mounted on the other side of the upper surface of the square plate, a clamping device is fixedly mounted at the top of the square plate, a fixing column is fixedly connected to the top of the base, and a transverse plate is fixedly connected to the top of the fixing column. According to the plastic optical fiber surface ironing machine, a plastic optical fiber is guided to the position below the clamping device through the guiding device, the clamping device and the placing plate are matched to fix the plastic optical fiber, the plastic optical fibers of different specifications can be fixed by adjusting the height of the sliding column, and if the end face of the plastic optical fiber is uneven, the plastic optical fiber can be fixed. An uneven end face can be cut off through the cutting knife, and then the plastic optical fiber is subjected to surface ironing treatment through the ironing plate.

The application belongs to the technical field of optical fiber stretching, and particularly relates to a plastic optical fiber stretching device. The device is convenient to use, and can avoid the problems of inconvenient fixed stretching, inconvenient fixed length stretching, over-heating and stretching, and non-stretching section stretching. The device comprises a workbench, a support plate is fixedly connected to the inner wall of one side of the workbench, a rotating shaft is rotatably connected to one side of the support plate, an optical fiber roll is fixedly connected to the outer wall of the rotating shaft, and a threading hole is formed in one side of the workbench. In the application, the sliding block, the adjusting nut and the wedge block can be used to complete fixed length stretching, and the adjusting nut can be used to adjust the stretching distance. The device is convenient to use, and can avoid the problems of optical fiber having stretched and non-stretched sections, thereby increasing work efficiency.

The present invention relates to the technical field of fiber optic connectors, and particularly to a wear-resistant and impact-resistant plastic fiber optic connector, which includes a plug base, an optical fiber plug, a first housing, a second housing, and a protective frame. The bottom of the first housing is connected to the top of the second housing, and protective frames are provided on one side of both the first housing and the second housing through bolt groups. The present invention provides safety protection for the plug base, optical fiber connection frame, and optical fiber plug inside the fiber optic connector through the protective frame and the support frame, avoiding deformation of the fiber optic connector after being impacted by the outside world, improving the safety performance of the fiber optic connector during use, further enhancing the impact resistance of the fiber optic connector after being impacted by using the protective plate, effectively improving the wear resistance of the fiber optic connector by using the wear-resistant sleeve, and the wear-resistant sleeve can buffer the impact force received by the fiber optic connector, thereby playing a certain safety protection effect on the first housing and the second housing inside.

The invention relates to the technical field of vehicle-mounted atmosphere lamp program control systems, and discloses a plastic optical fiber action state adjusting method and system for a vehicle-mounted atmosphere lamp. On the basis of driver emotion analysis information, in combination with an AI algorithm and plastic optical fiber light-emitting action scene type information based on big data storage, scientific classification analysis of vehicle-mounted atmosphere lamp plastic optical fiber light-emitting action scene types is carried out, and self-adaptive matching of vehicle-mounted atmosphere lamp plastic optical fiber light-emitting action scenes based on driver emotion fluctuation is achieved; carrying out reliable real-time analysis on the plastic optical fiber light-emitting control instruction parameters of the atmosphere lamp according to the light-emitting action scene matching information of the plastic optical fiber in the vehicle and by combining an intelligent search algorithm and the scientific plastic optical fiber light-emitting control instruction parameters; the vehicle-mounted atmosphere lamp plastic optical fiber light-emitting control instruction is safely and efficiently planned based on the emotion fluctuation of the driver, and the humanization and intelligence of the light-emitting effect control of the vehicle-mounted atmosphere lamp are improved.

The embodiment of the present application relates to the technical field of plastic optical fiber, and particularly relates to a layered co-extrusion die for manufacturing polymer optical fiber and a production device. In the embodiment of the present application, the die body comprises a plurality of annular components arranged in sequence and spaced apart from each other from inside to outside, and a flow channel of polymer melt is arranged between two adjacent annular components. In the plurality of annular components, a plurality of hollow columns extending along the axial direction of the annular component are further arranged between at least two adjacent annular components, and the hollow columns are distributed at intervals. In the process of preparing an optical fiber preform by using the die, the side wall of the hollow column is used to prevent the polymer melt from flowing into the inner cavity of the hollow column, so as to form the preform cavity. The die provided in the embodiment of the present application can be used to realize the industrial production of the optical fiber preform of the annular cavity polymer optical fiber by using the layered co-extrusion process, and the optical fiber preform is drawn in the subsequent process, so as to realize the industrial production of the annular cavity polymer optical fiber.

The application provides a kind of equal-length cutting device for plastic optical fiber production, belongs to the technical field of optical fiber processing equipment, including cutting mechanism and optical fiber conveying mechanism.Cutting mechanism is provided with driving assembly, transmission shaft, turntable and circumferential array cutting blade;Optical fiber conveying mechanism is provided with guide frame, directional wheel, guide cylinder, pressure roller, driving wheel, toggle block and extension spring, and the cutting power is transmitted to the driving wheel through the transmission rod, bevel gear pair, driving dial and four-groove gear in the transmission assembly, so that it does intermittent rotation.The application solves the technical problems of low automation, inability to continuous fixed-length cutting, poor consistency in length, and complex structure and high cost caused by dependence on electronic control system, realizes automatic intermittent feeding and continuous cutting of optical fiber under pure mechanical linkage, the optical fiber is stationary during cutting, accurate in fixed length, and easy to operate.

The application discloses a micro-crack optical waveguide carrying integration process of a distributed photonic synapse operation unit, which sequentially comprises three procedures of visual high-precision alignment, dynamic weight matching and sealing stress release, and is matched with a quartz-plastic optical fiber composite transition connection structure through micron-level visual positioning, real-time optical path feedback adjustment and gradient temperature curing, so that the influence of assembly stress on the micro-crack optical path is reduced while the assembly precision is ensured, and the finished product yield and operation stability are greatly improved.

The invention discloses a tilted fiber grating concentration measuring instrument and a concentration measuring method. By adopting a tilted fiber grating sensor made of plastic optical fiber and encapsulating it in a reaction chamber, the interference effect of the pressure generated by a solution to be measured on the tilted fiber grating sensor is reduced, and the measurement accuracy and reliability are improved. In addition, since the manufacturing process of plastic optical fiber is mature, the price is lower than that of glass optical fiber, and the cost is relatively low. Moreover, the plastic optical fiber as a sensor also has the characteristics of high elastic strain limit, high fracture toughness, high bending flexibility, and high sensitivity to strain and temperature.