422 results about "Transmission loss" patented technology

The invention provides a low-orbit satellite communication terminal network performance dynamic tuning method and system, and relates to the technical field of low-orbit satellite communication. Comprehensive data such as relative movement of a satellite and a terminal and signal transmission loss are acquired; preprocessing the integrated data, inputting the preprocessed integrated data into a time sequence prediction model containing LSTM and Transform, generating a signal quality and intensity index sequence and a link stability level in a future preset time window, and carrying out dynamic optimization based on the generated indexes, including adjusting a terminal modulation mode according to the signal quality; combining the link stability and the signal strength to aggregate the link, and optimizing the switching opportunity and path; allocating resources according to the signal strength and the service characteristics; and optimizing the energy consumption according to the relative motion and the business characteristics. Through accurate prediction and multi-dimensional adjustment and optimization, the communication efficiency and reliability of the low-orbit satellite communication terminal network are improved, energy consumption and delay are reduced, and good communication quality is guaranteed.

The invention provides a continuous depth gradually-changing grating structure based on a silicon carbide substrate and a preparation method thereof. The preparation method comprises the following steps: forming a sacrificial layer with gradually-changing thickness on the silicon carbide substrate; etching is carried out by adopting a two-step plasma etching process; and polishing the surface through a plasma polishing process. According to the invention, the gradient sacrificial layer is combined with two-step plasma etching, and a high-precision continuous depth gradient grating structure is realized on the silicon carbide substrate, so that the diffraction requirements of RGB three-color wavelengths are met; the micro-groove defect in the etching process is eliminated, the problem that the depth-to-width ratio and the surface quality cannot be considered in the traditional process is solved, and a key technical support is provided for mass production of the single-layer full-color optical waveguide; the transmission loss of the optical waveguide is reduced by controlling the surface roughness; and the product yield is improved, the production cost is reduced, and the method is suitable for large-scale production.

The invention discloses a hydropower line economic dispatching and load collaborative optimization system and method, and relates to the technical field of hydropower dispatching, and the system comprises a data collection module which is used for collecting hydropower station unit water consumption characteristic curve data, power grid real-time load demand data, reservoir water level dynamic data and unit vibration area constraint data; the model construction module is used for preprocessing the data acquired by the data acquisition module and constructing a multi-target optimization model with the minimum total water consumption and the minimum line transmission loss as targets in combination with constraint conditions; the improved optimization module is used for receiving the target function and the constraint condition output by the multi-target optimization model module and dynamically calculating the optimal load distribution scheme of each unit; and the result output module is used for receiving the optimal load distribution scheme output by the improvement and optimization module and realizing visual output and decision assistance of the scheme. The problem that a traditional scheduling scheme is low in traditional scheduling decision-making efficiency is solved, and the scheduling decision-making efficiency and engineering practicability are improved.

The invention provides a fixed-frequency beam scanning leaky-wave antenna and electronic equipment. The leaky-wave antenna comprises a first microstrip line and a second microstrip line, wherein the first microstrip line and the second microstrip line are used for transmitting radio frequency signals and are arranged at an interval; the N antenna units are connected to the first microstrip line and the second microstrip line, and each antenna unit comprises a first switch and a second switch; a first stub and a second stub, and an antenna. According to the technical scheme, the leaky-wave antenna is simple in structure, easy to process, high in expansibility and capable of reducing parasitism, transmission loss, element loss and the like.

The invention relates to a micro-ring resonator based on a multi-circle square structure, the micro-ring resonator comprises a coupling waveguide and a multi-circle square micro-ring resonant cavity, the coupling waveguide comprises an S-bend waveguide, an input waveguide and an output waveguide which are all single-mode waveguides, and the multi-circle square micro-ring resonant cavity comprises a crossed waveguide chain and a multi-mode waveguide section connected with the crossed waveguide chain. The multi-mode waveguide section comprises a multi-mode straight waveguide and a 90-degree multi-mode Euler bending waveguide. By introducing the multi-mode waveguide, the energy distribution of the guided mode on the side wall is reduced, and the transmission loss of the micro-ring resonant cavity is reduced. Through the arrangement of the multi-circle square micro-ring resonant cavity, the length of the micro-ring is increased within a limited size, and the Q value of the multi-circle square micro-ring resonant cavity is improved. By means of the 90-degree multimode Euler bending waveguide, compact 90-degree turning is achieved, generation of a high-order mode is restrained, and meanwhile the micro-ring surrounding area is increased. Therefore, a solution can be provided for the high-performance sensing unit for the integrated micro-ring sensor.

The invention provides an on-chip terahertz band-pass filter based on an artificial surface plasmon high-order mode, and the on-chip terahertz band-pass filter comprises a dielectric substrate, a feed microstrip line, a first transition structure, a short-branch artificial surface plasmon transmission region, a second transition structure, and a long-branch artificial surface plasmon transmission region. Feed microstrip lines are arranged at the two ends of the front face of the dielectric substrate respectively, each feed microstrip line is sequentially connected with a first transition structure, a short-branch artificial surface plasmon transmission area and a second transition structure, and a long-branch artificial surface plasmon transmission area is located in the middle of the front face of the dielectric substrate. Two ends of the long branch artificial surface plasmon transmission region are respectively connected with a second transition structure, and the whole back surface of the dielectric substrate is covered with a metal layer as a metal ground; the wide-stop-band microstrip antenna has the advantages of being wide in stop band, easy to machine, small in transmission loss and small in crosstalk, does not need punching operation, and is convenient to machine.

The invention relates to the technical field of temperature control, in particular to a multi-dimensional compensation ablation system temperature control system, method and device and a medium. The system calculates a medium texture index representing the structural change of the load medium by synchronously acquiring electrical parameters and ultrasonic image data; constructing an anti-interference control model comprising an extended state observer, and defining energy transmission loss caused by contact thermal resistance as an extended state variable; calculating an adaptive correction factor based on the texture index, dynamically correcting the state updating process of the observer to obtain an energy loss correction estimated value, and constructing a compensation control model to adjust the output power according to the energy loss correction estimated value; according to the invention, the technical problem of incomplete heating caused by false high temperature of the sensor and system misjudgment due to state deterioration of the contact interface is effectively solved; accurate reconstruction and closed-loop compensation of effective heat flow in a non-ideal contact environment are realized, sufficient energy penetration can still be maintained even if contact thermal resistance is sharply increased, and the integrity of an ablation area is guaranteed.

The invention belongs to the technical field of artificial intelligence, and discloses a smart energy production and distribution system based on artificial intelligence. The system comprises a sensing layer used for collecting energy production parameters, storage capacity, transmission loss and user requirements in real time; the data processing layer is used for performing exception elimination, format standardization and integrated storage according to production, storage, transmission and demand dimensions; according to the AI intelligent decision-making layer, a prediction unit outputs energy production potential and demand peak values in the future 1-24 hours, and an optimization unit generates a production adjustment, storage allocation and transmission path optimization scheme; and the execution layer receives and executes the scheduling operation. According to the system, supply and demand pre-judgment and dynamic regulation and control are realized through AI intelligent decision, the problem of traditional response lag is solved, and the energy utilization rate is increased by more than 15%; accurate input is provided for decision-making through full-chain data acquisition and standardized processing, so that the scheduling scheme is more practical, and the transmission loss is reduced by more than 10%.

The invention provides a circuit board high-frequency characteristic detection analysis method and system based on a stub test platform, and the method comprises the steps: obtaining an S parameter of a PCB signal network based on a vector network analyzer (VNA), judging whether the signal transmission loss caused by a stub meets a detection requirement or not, and outputting the length of the stub and carrying out the TDR detection when a VNA detection result is unqualified; the size of a reflected signal of the PCB signal network is obtained based on a time domain reflectometer TDR, whether impedance change caused by a stub in a TDR curve is qualified or not is judged, and when a TDR detection result is not qualified, the specific position of the stub is output, and backdrill capacitance characteristic detection is carried out; capacitance characteristic parameters of the abnormal back drilling via hole are obtained based on back drilling capacitance characteristic detection, and the specific form of the stub is determined. The method and the system are specially used for detecting the stubs in the PCB high-density multilayer board, not only have the remarkable advantages of high precision, high speed and high reliability, but also provide solid technical support for accurate evaluation and strict quality control of product performance.

The invention relates to the field of electrical variable measurement, in particular to an insulating layer compactness detection method for a mineral cable, which comprises the following steps: firstly, acquiring a time domain reflection signal of the cable, and carrying out denoising pretreatment by utilizing synchronous average and wavelet transform; and then, carrying out spectrum analysis on the discrete signal segments, calculating a spectrum centroid offset rate to determine high-frequency energy attenuation, and constructing a dynamic compensation gain coefficient according to the high-frequency energy attenuation. And then, improving a traditional layer stripping algorithm by using the gain coefficient, eliminating calculation deviation caused by transmission loss, and accurately reconstructing characteristic impedance distribution along the cable. And finally, by comparing the deviation between the reconstructed impedance and the nominal impedance, positioning and judging the abnormities of the compactness of the insulating layer of the cable and the eccentricity defect of the cable core are realized.

The invention provides a transformer area two-stage distribution robust line loss optimization method considering wind and light uncertainty, and belongs to the technical field of new energy. Firstly, a day-ahead-real-time two-stage line loss optimization method is constructed, and in the day-ahead stage, a K-means clustering algorithm and a conditional generative adversarial network are combined to generate a multi-scene sample set capable of reflecting the uncertainty of wind and light output; in a real-time stage, based on a day-ahead optimization result and updated output information, a multi-scene distribution robust optimization model is utilized to realize joint correction of line loss and economic dispatching; in the optimization solution process, a forward-backward substitution method is adopted to embed the load flow calculation model so as to accurately reflect the line transmission loss of the transformer area power distribution network; secondly, a distributed robust optimization method based on scene generation is constructed, historical wind and light data are utilized, a diversified scene set is generated through K-means clustering and a conditional generative adversarial network, and distributed robust optimization planning and correction are carried out in different scenes.

To reduce transmission loss of an electric signal between components while reducing the number of connection components of a solid-state imaging element and a semiconductor element to a connection substrate, and to reduce a mounting area.SOLUTION: The semiconductor package 1 includes the solid-state imaging device 10 having the chip substrate 11 and the semiconductor device 60, the circuit substrate 20 is disposed in the outer peripheral portion of the first surface 11a which is the surface of the chip substrate 11 on the light incident side, the circuit substrate 20 has the first surface 20a which is the surface on the light incident side and the second surface 20a opposite to the first surface 20b of the circuit substrate 20, and the semiconductor device 60 is disposed on the second surface 20b of the circuit substrate 20.SELECTED DRAWING: Figure 1

The utility model relates to the field of sensor packaging, in particular to an embedded image sensor packaging structure which comprises a substrate, an annular heat conduction groove and a heat dissipation assembly, heat is efficiently collected through a heat dissipation copper sheet, and heat is efficiently conducted through sintered silver paste. Heat absorbed by the heat dissipation copper sheet can be quickly transmitted to the vertical heat conduction through holes in the substrates, so that the heat is efficiently transmitted between the substrates, the heat dissipation path is expanded, the heat dissipation efficiency is improved, the electrical conduction between the heat dissipation copper sheet and the vertical heat conduction through holes is ensured, the electrical performance of the whole packaging structure is more stable and reliable, and the service life of the packaging structure is prolonged. The image sensor is simple in structure and convenient to use, signal interference and transmission loss are reduced, the quality and stability of output signals of the sensor are guaranteed, the trapezoidal waterproof dam is formed at the edge of the double-layer stepped infrared optical filter, the waterproof capacity can be further enhanced, water vapor is prevented from entering the image sensor from the edge of the optical filter, and it is guaranteed that the image sensor can work normally in a humid environment.

The invention discloses an electrolytic copper foil and a preparation method and application thereof. The preparation method of the electrolytic copper foil comprises the following steps that raw foil is sequentially subjected to acid pickling, grain structure optimization treatment, roughening treatment, functional layer plating and silane coupling treatment, then drying and rolling are conducted, and the electrolytic copper foil is prepared. Crude foil is subjected to grain structure optimization treatment to form a copper layer with a special grain structure, and the rough structure of the surface of the copper layer is optimized by accurately controlling rough curing treatment conditions, so that the high-frequency transmission and interface bonding performance of the electrolytic copper foil is synergistically improved; the prepared electrolytic copper foil has the characteristics of lower signal transmission loss and high peel strength, is low in warping degree and excellent in mechanical property, and can meet the use requirements of ultrahigh-speed communication on electromagnetic shielding layer materials with low transmission loss and high reliable bonding strength.

The invention relates to the related technical field of silicon photon chips, in particular to a high-speed silicon optical engine method and device for a silicon optical module, and the method comprises the steps: obtaining basic technical parameters of an optical fiber connection product with the silicon optical module; the refractive index distribution and the waveguide section size of the silicon optical waveguide are configured, and a multi-mode waveguide array is constructed; an electro-optical modulator array is integrated in a multi-mode waveguide array, and the coupling efficiency of waveguides and optical fibers is adjusted in real time through dynamic impedance matching; meanwhile, the high-speed electric drive circuit is used for driving the electro-optical modulator array and optimizing rising edge characteristics / falling edge characteristics of signals, and power consumption adjustment is carried out on the high-speed electric drive circuit. The technical problem that the optical signal quality is reduced due to the fact that the silicon optical waveguide design mostly adopts fixed parameters and mode crosstalk is prone to occurring in a high-speed transmission scene is solved, and the technical effects that the waveguide refractive index is dynamically configured, the multi-mode waveguide array is constructed, the mode crosstalk is effectively reduced, the transmission loss is reduced, and the optical signal transmission quality is improved are achieved.

The invention relates to the technical field of flange connectors, in particular to a quick-plug type flange connector for a high-frequency sealing environment. The external connecting mechanism comprises a plurality of flange terminals; the signal transmission mechanism comprises a plurality of female pins and an inner conductor which is in plug-in connection with the female pins; the signal acquisition module comprises a micro strain gauge array and a plurality of micro eddy current sensors; the insertion force monitoring module is used for judging whether the reed of the female pin has stress relaxation or not based on the fluctuation characteristic parameters; the trajectory tracking module is used for determining local relaxation or overall relaxation of the reed based on the trajectory fitting index; the torque adjusting module is used for determining the increment torque of the split spring based on the radial offset of the reed and optimizing the increment torque; and the loss monitoring module is used for determining whether the contact state of the female pin and the inner conductor is qualified or not based on the signal transmission loss so as to optimize the preset characteristic parameters. The signal transmission stability of the flange connector is improved.

The invention discloses a millimeter wave waveguide transmission loss compensation method, which relates to the technical field of millimeter wave waveguide transmission and comprises the following steps of: monitoring multi-dimensional transmission loss in real time: acquiring electrical parameters such as signal amplitude and phase and parameters such as temperature, humidity and structural deformation to ensure data time synchronization; a loss mechanism layering analysis step: distinguishing three types of loss proportions, and determining dominant factors; a self-adaptive compensation strategy matching step: selecting an exclusive or cooperative compensation mode according to the loss type; a dynamic compensation parameter optimization step: adapting a signal frequency to adjust device parameters; a real-time feedback and fine tuning step: comparing signal quality dynamic correction parameters; and a closed-loop iterative optimization step: constructing a mapping model for iterative updating to form a whole-process closed loop. According to the invention, accurate and efficient compensation of millimeter wave waveguide transmission loss is realized, and signal transmission stability and environment adaptability are improved; the system has quick response and long-term operation reliability, and provides support for large-scale application of the millimeter wave technology.

This disclosure provides a circuit board and an electronic device. In addition to a PCB, the circuit board may further include an FPC assembled on the PCB. In addition, a line between different components assembled on the PCB includes a line in the PCB, and further includes a line in the FPC. Because a quantity of core boards in the FPC is generally far less than a quantity of core boards in the PCB, selecting a core board with a dielectric loss less than that of the core board in the PCB for the FPC helps reduce a transmission loss of a high-speed signal in the circuit board, and helps reduce costs of the circuit board. This disclosure further provides an electronic device. Selecting, for the electronic device, the circuit board provided in this disclosure helps improve cost competitiveness of the electronic device in a high-speed high-density scenario.

The present invention provides: a fluororesin film for a multilayer structure substrate, with which it is possible to produce, without using an adhesive, a multilayer structure substrate that has less transmission loss during high-frequency communication; a method for producing the fluororesin film for a multilayer structure substrate; a copper-clad laminate; a multilayer structure substrate; a method for producing a multilayer structure substrate; and a circuit board.　Disclosed is a fluororesin film for a multilayer structure substrate, which contains a fluororesin and an inorganic filler that is dispersed in the fluororesin, wherein the dielectric loss tangent Df is 0.0013 or less and the loss elastic modulus at a temperature of 350°C is 1.6 MPa or more. The fluororesin film for a multilayer structure substrate is used for the purpose of producing a multilayer structure substrate by bonding, without using an adhesive, a plurality of copper-clad laminates that have a two-layer structure in which a copper foil and the fluororesin film for a multilayer structure substrate are laminated.

The invention discloses a reflective beam-combining visual field splicing system, a multi-path laser scanning beam-combining system and a laser scanning microscope, and relates to the technical field of microscopic imaging instruments, the reflective beam-combining visual field splicing system comprises at least one reflective beam-combining subunit, and the reflective beam-combining subunit comprises a relay lens group and an adjustable reflector; the relay lens group comprises two 4f systems, pupil conjugate planes of starting points of the 4f systems are different, and a focus conjugate plane exists in an internal optical space between the two 4f systems; the adjustable reflecting mirror is arranged in the internal optical space, receives and reflects the light beam from the first light path, and meanwhile allows the light beam from the second light path to pass through without blocking; wherein the first light path light beam reflected by the adjustable reflecting mirror and the straight-through second light path light beam are subjected to beam combination visual field splicing on a focal point conjugate surface, and are converged on the same pupil conjugate surface. According to the reflection-type beam-combining view splicing system, the light path structure can be simplified, and the transmission loss of laser energy is reduced.

The invention discloses a guided wave detection and quantitative evaluation method for submarine pipeline routing deviation. The method comprises the steps that S1, an excitation end module periodically injects stable guided wave signals into a pipeline; s2, an annular receiving module for synchronously receiving signals in the whole annular direction is installed at a terminal of the pipeline, and guided wave signals propagated for a long distance are accurately captured; s3, filtering and enhancing the originally collected noisy signals; s4, performing time-frequency analysis and waveform inversion on the received signal, and respectively extracting: calculating the equivalent curvature radius of the offset section according to the propagation velocity change; extracting phase lag information according to the phase change, and calculating a vibration path increment; calculating the overall transmission loss according to the amplitude attenuation degree; and S5, establishing a comprehensive identification criterion fusing the three types of feature parameters. The low-attenuation long-distance propagation characteristic of the L (0, 1) mode is utilized, the excitation device and the receiving array are arranged at the two ends of the pipeline, and online periodic remote monitoring under the non-stop production state is achieved.

The invention provides a polarization correction method, device and system and a storage medium, and the method can be suitable for an Internet of Things scene. In the method, a first network device receives two pilot frequency sequences sent by a terminal device in a time slot, namely a first pilot frequency sequence and a second pilot frequency sequence. After the pilot frequency sequence is obtained, the first network device obtains a first channel estimation result based on the first pilot frequency sequence and obtains a second channel estimation result based on the second pilot frequency sequence. And the first network device determines a first angle value based on the first channel estimation result and the second channel estimation result, the first angle value being an included angle between a polarization direction and a horizontal polarization direction of an antenna on the terminal device. And then, the first network equipment adjusts the rotation angle of the polarization rotator based on the first angle value, so that the polarization direction of the first network equipment is matched with the polarization direction of the terminal equipment, and the transmission loss is reduced.

The present application relates to the technical field of timing control, in particular to a multi-channel audio acquisition timing control method and device, the method uses timing control algorithm and SPI interface, and the sampling clock frequency is set to be consistent with the audio file playing frequency; when the Ram reading and writing address timing is performed, Ram1 is read according to the assignment of the counter Counter_AD_I and the assignment of the counter Counter_AD_O; when the Ram reading and writing alternate timing is performed, Ram1_A and Ram1_B appear alternately in reading and writing, and the relationship between Counter_AD_I and 1023 is used to further judge whether to use beat A or beat B for reading and writing alternation, wherein Counter_AD_I is the address of writing Ram, and Counter_AD_O is the address of reading Ram. The microphone can obtain higher quality audio data; the microphone and the transmission optical fiber have insulation and explosion-proof characteristics; the optical fiber has small long-distance transmission loss.

The application relates to the technical field of optical fiber communication cables, in particular to an ultra-low-loss hollow-core optical fiber composite cable based on an anti-resonance structure, which comprises a cylindrical optical fiber composite cable body, a reinforcing rod serving as a support member is arranged at the center of the optical fiber composite cable body, a plurality of spiral partitions fixedly connected with the reinforcing rod are uniformly distributed in the circumferential direction of the reinforcing rod, adjacent spiral partitions form independent spiral cavities, the spiral cavities are variable-pitch spiral channels, hollow-core optical fibers and solid-core optical fibers are arranged in the spiral cavities at intervals and are wound around the outer periphery of the reinforcing rod along the spiral tracks of the spiral partitions, and a sealing protection structure is mounted on the periphery of the spiral cavities, so that the problems in the prior art that the stress resistance is weak, the optical fiber is easily broken or the transmission loss is increased when the optical fiber is laid, stretched and bent, and the crosstalk between the optical fibers is serious, thereby affecting the transmission stability are effectively solved.

The application provides a substation ultra-high frequency RFID reading and writing device and a reading and writing method, and belongs to the technical field of RFID. The substation ultra-high frequency RFID reading and writing device comprises a reader, an antenna, a radio frequency cable, a first power divider, a second power divider and an amplifier. One end of the radio frequency cable is connected to the reader, and the other end is connected to the total port of the first power divider. The first power divider and the second power divider are both one-to-two power dividers. The amplifier is connected in series between one branch port of the first power divider and one branch port of the second power divider, and the other branch port of the first power divider and the other branch port of the second power divider are directly connected. The total port of the second power divider is connected to the antenna. The application can compensate for the transmission loss in the radio frequency cable, improve the power of the radio frequency signal and the reading and writing distance of the reader, and flexibly arrange the antenna according to the field conditions and select a smooth signal transmission path.

To provide a wiring circuit board which can be manufactured with simple facilities and processes and can reduce transmission loss, and to provide a method of manufacturing the wiring circuit board.SOLUTION: The wiring circuit board 1 sequentially includes a metal supporting board 2, a metal particle-containing layer 3 containing metal particles 31, an insulating layer 4, and a conductive pattern 5 toward one side in a thickness direction.SELECTED DRAWING: Figure 1

The invention relates to the technical field of connector data transmission, in particular to a transmission data integrity detection method in the flight process of an unmanned aerial vehicle. The method comprises the following steps: acquiring state data of a connector in a flight process of the unmanned aerial vehicle and real-time transmission state data of a link layer and an application layer in a data transmission process; determining an environmental influence factor of the connector based on the state data; analyzing the change of the environmental influence factor, and determining a degradation trend coefficient; determining a real-time data transmission state coefficient in combination with the real-time transmission state data; weighting the real-time data transmission state coefficient through the degradation trend coefficient to obtain a data transmission loss degree; and obtaining a transmission integrity evaluation index of the connector according to the data transmission loss degree and the data accumulation loss amount. According to the invention, the timeliness of abnormal positioning and repairing in the data transmission process is improved, and the transmission loss rate of the unmanned aerial vehicle data is reduced.

The application discloses a vertical lifting crimping mechanism and belongs to the field of display panel testing.The crimping mechanism comprises a carrier plate and a crimping piece;the carrier plate is provided with a first through hole for accommodating a switching probe module on a machine table;the crimping piece comprises a die core mounting plate, a PCB and a lead-through probe module;the die core mounting plate is provided with a second through hole;the PCB is located above the die core mounting plate;the PCB is provided with a plurality of switching test points;the plurality of switching test points, the second through hole and the first through hole are sequentially and oppositely arranged in a first direction;the lead-through probe module is inserted and mounted on the die core mounting plate;one lead-through part of the lead-through probe module is in lead-through connection with the PCB;another lead-through part of the lead-through probe module is used for crimping lead-through connection with a connector of a display panel;an elastic piece is clamped between the die core mounting plate and the carrier plate.The vertical lifting crimping mechanism provided by the application can greatly reduce the testing cost and the transmission loss in the signal switching process.

The application provides a terahertz wave tunable waveguide type narrow-band filter and a manufacturing method thereof. The filter comprises a cavity with a rectangular structure, the upper surface and the lower surface of the cavity are low-loss metal surfaces with a periodic groove structure, a wedge-shaped protruding area is arranged in the middle of the cavity, and the two side walls are flat. The application has the advantages of simple structure, small size, low cost, easy integration, high Q value, small insertion loss, small transmission loss, and the like. The tuning of the output center frequency of the filter can be realized by adjusting the transverse position of the filter. The filter bandwidth and the transmissivity of the filter can be changed by changing the number of waveguide periods, the distance between the upper and lower flat plates, and the groove depth.

The invention relates to the technical field of surfactant online monitoring, and discloses a surfactant production raw material online monitoring and analysis system, which comprises a near-infrared detection light source, an optical acquisition module and an analysis control module, calculating a real-time average intensity and an effective value fluctuation component of the voltage signal sequence, determining a real-time variable coefficient value, and identifying a transmission loss component caused by material hanging of the detection window according to the stability of the real-time variable coefficient value, so as to execute amplitude gain correction on the voltage signal sequence, extract intrinsic light absorption characteristics, and obtain an intrinsic light absorption characteristic; according to the invention, by establishing essential correlation logic of the variable coefficient and hanging material deposition, real-time decoupling of physical hanging material interference and component drift characteristics under a single light path is realized, the influence of a high-viscosity material adsorption layer on a measurement basis is eliminated, and the physical continuity of component analysis is ensured.