110 results about "Channel filter" patented technology

The invention discloses a self-adaptive filtering method and system for an intelligent electric energy meter, and relates to the technical field of power grid signal processing, and the method comprises the steps: obtaining a power grid voltage and current signal set collected by a target intelligent electric energy meter historically, and obtaining a signal noise spectrum data set and a noise level evaluation result through spectrum analysis and noise level evaluation; if the result exceeds a preset noise threshold value, identifying an interference type and building a noise adaptive filtering multi-channel, integrating and deploying the noise adaptive filtering multi-channel into a target intelligent electric meter to complete signal filtering test and effect evaluation, and dynamically optimizing and generating an electric energy meter adaptive filtering multi-channel based on the obtained multi-channel filtering effect index parameter; and finally, signal filtering closed-loop control is realized. The technical problem that a traditional electric energy meter is weak in filtering pertinence and cannot adapt to dynamic noise of a power grid in electric power related scenes with complex dynamic interference is solved, and the technical effects that the electric variable measurement accuracy of the electric energy meter is improved, and the adaptive capacity of the electric energy meter to different interference scenes is enhanced are achieved.

The invention provides a Q / V frequency band large-scale satellite communication load channel optimization method, which comprises a forward input link and a backward output link, and is characterized in that the forward input link comprises a V frequency band multi-beam antenna feed source array, a plurality of input preselectors, a V frequency band low noise amplifier input switch ring and a V / Ka integrated receiver assembly which are connected in sequence; the output end of the V-band multi-beam antenna feed source array is connected with the input end of the V / Ka integrated receiver assembly through a waveguide. The reverse output link comprises a Ka / Q frequency converter, a Q-band channel filter, a Q-band traveling wave tube amplifier, a change-over switch, a Q-band output duplexer or filter and a Q-band feed beam which are connected in sequence, and the output end of the Ka / Q frequency converter is connected to the input end of the Q-band channel filter through a waveguide; and the output end of the Q-band channel filter is directly connected to the input end of the Q-band traveling wave tube amplifier through the waveguide. Therefore, the method is low in link loss, high in space utilization rate and high in feasibility.

The invention discloses an AI-based historical defective fresco digital restoration system, and relates to the technical field of AI restoration, a two-channel filter and a U-Net network are adopted to extract a fresco damage boundary, and edge detection is enhanced in combination with manual labeling; calculating a multi-scale Hurst index, and constructing a matrix quantization fractal feature change rule; dynamically generating a probabilistic grammar rule set based on the fractal incidence matrix, and defining a state transition probability function of texture growth; recursively executing texture generation driven by grammar rules from boundary points, and introducing random disturbance attenuating along with depth to simulate a stroke natural form; textures are generated through Laplacian pyramid layered correction, and the phase of a reference image is aligned in a Fourier domain to reserve structural consistency; and solving an affine transformation matrix with unchanged illumination in the transition zone, and globally optimizing color connection between the restoration area and the original wall painting. According to the method, the dynamic grammar rule base is established by analyzing the fractal features of the residual strokes, so that the generated texture follows creation logic, and the visual coherence of a recovery area is improved.

A flexible multi-path RF adaptive tuning network switch architecture that counteracts impedance mismatch conditions arising from various combinations of coupled RF band filters, particularly in a Carrier Aggregation-based (CA) radio system. In one version, a digitally-controlled tunable matching network is coupled to a multi-path RF switch in order to provide adaptive impedance matching for various combinations of RF band filters. Optionally, some or all RF band filters include an associated digitally-controlled filter pre-match network to further improve impedance matching. In a second version, some or all RF band filters coupled to a multi-path RF switch include a digitally-controlled phase matching network to provide necessary per-band impedance matching. Optionally, a digitally-controlled tunable matching network may be included on the common port of the multi-path RF switch to provide additional impedance matching capability. In a third version, CA direct mapped adaptive tuning networks include filter tuning blocks for selected lower frequency bands.

Embodiments of the present invention disclose a data processing method, system, and apparatus for a multi-channel filter, a device, and a medium. The method comprises: acquiring target data of multiple channels and corresponding filtering modes; on the basis of the filtering modes, respectively storing the target data in corresponding registers, the registers corresponding to the filtering modes; determining whether filter kernels corresponding to the registers are in an idle state; and if the filter kernels are in an idle state, sending the target data to the filter kernels to undergo filtering processing. According to the technical solution, target data can be stored in registers in advance, and, on the basis of filtering modes, the target data is sent to different filter kernels for processing, thereby effectively solving the problem of data loss.

The application discloses a high-transmittance absorption type color matching filter, a preparation method and a three-channel filter set. The method comprises the following steps: cleaning, drying and surface activation treatment of a transparent substrate; preparing at least two absorption layer coating liquids with different spectral absorption characteristics according to the spectral characteristics of a target matching waveband; layer-by-layer coating and solidification of the coating liquids on the surface of the transparent substrate to sequentially form 2-5 absorption sub-layers, so as to obtain a composite absorption film; and depositing a transparent dielectric layer on the surface of the composite absorption film as a hard protective layer, so as to obtain the filter. The application also provides a high-transmittance absorption type color matching filter prepared by the method and a three-channel color matching filter set comprising X, Y and Z three-channel filters. The application is used for solving the problems of low matching precision and low transmittance of the existing color matching filter.

This invention relates to the field of dual-passband filter technology and discloses an ultra-narrowband high-temperature superconducting symmetrical dual-channel filter. The invention establishes a high-order coupled topology based on CT and CQ units, enabling free adjustment of the zero positions between the two sub-passbands and the introduction of a pair of transmission zeros out of the dual-passband filter, thus achieving good sideband suppression between sub-passbands and throughout the entire dual-passband filter.

The invention provides a spatial audio processing method of a volume sound source, spatial audio processing equipment of the volume sound source and a computer readable storage medium. The spatial audio processing method for the volume sound source comprises the following steps: acquiring first position information, a first geometric feature and a first acoustic feature of the sound source, second position information, a second geometric feature and a second acoustic feature of a shielding object, and third position information of a listener to perform ray tracing; determining the projection position of each tracking light on the spherical surface of the listener and the energy intensity corresponding to the projection position according to the light tracking result; determining a spherical harmonic coefficient of the sound source according to the projection position of each tracking light on the spherical surface of the listener and the corresponding energy intensity, so as to generate a multi-channel filter; and filtering a point sound source signal of the sound source using the multi-channel filter to generate a volumetric sound source signal conforming to the first geometric feature.

The utility model provides a multichannel optical filter switching and stacking device, an optical filter mounting body comprises a mounting cylinder, and a plurality of optical filter mounting holes are uniformly processed on the outer wall of the mounting cylinder in the circumferential direction; a first dual-channel optical filter switching device, a second dual-channel optical filter switching device, a third dual-channel optical filter switching device or a fourth dual-channel optical filter switching device are selectively and correspondingly mounted at the positions of the optical filter mounting holes respectively; after the first dual-channel optical filter switching device, the second dual-channel optical filter switching device, the third dual-channel optical filter switching device or the fourth dual-channel optical filter switching device are installed, all optical filters are converged at the optical filter superposition center of the installation cylinder. The device comprises a plurality of optical filters, each optical filter corresponds to one channel, the corresponding channel can be selected in a free superposition mode, the device can process light rays of various colors or wavelengths at the same time through the design, and the working efficiency and flexibility are improved.

The utility model discloses a multi-channel filtering device for a needle type filter, which is characterized by comprising a porous upper supporting plate and a porous lower supporting plate positioned below the porous upper supporting plate, and a plurality of uniformly distributed stepped through holes for placing the filter are formed in the porous upper supporting plate; a plurality of sample introduction bottle positioning grooves corresponding to the stepped through holes are formed in the porous lower supporting plate; the two sides of the bottom of the porous upper supporting plate are symmetrically provided with at least one supporting column, and the two side edges of the porous lower supporting plate are each provided with a supporting column positioning groove which is used for being matched with the supporting column in an inserted mode and provided with a semi-opening. Guide sliding grooves allowing the porous upper supporting plate to horizontally move out of the porous lower supporting plate from the supporting column positioning grooves are formed in the porous lower supporting plate and located between the adjacent stepped through holes, one side of each guide sliding groove is communicated with the corresponding supporting column positioning groove with an inward opening, and the filter has the advantages that the number of filtered samples at a time is large, the filtering efficiency is high, and cross contamination of the filtered samples is avoided.

A method is disclosed of selecting users for multi user multiple-input multiple-output (MU-MIMO) communication from an initial set of potential users. The method comprises repeating the following steps in successive iterations until a stopping criterion is met: determining a channel correlation metric for each user in the set of potential users, reducing the set of potential users by exclusion of a user based on the channel correlation metric, and calculating a performance metric of the set of potential users. The method also comprises selecting users corresponding to one of the sets of potential users, wherein the selection is based on a comparison of the calculated performance metrics of the sets of potential users. The channel correlation metric for a user may comprise one or more of: a channel filter norm for the user, a channel norm for the user, a channel gain for the user, pair-wise correlations between the user and one or more other users of the set of potential users, and a channel eigenvalue for the user. The performance metric may comprise one or more of: a sum-rate, a per-user-rate, an average error rate, a maximum error rate, a per-user error rate, and a sum-correlation. Corresponding apparatus, network node and computer program product are also disclosed.

Techniques are disclosed for the use of Crest Factor Reduction (CFR) technique that utilizes a cancellation pulse signal having a reduced length. The CFR technique may be applied to a signal to be transmitted, which may comprise a composite signal having one or more carrier signals. Each carrier signal of the composite signal may be filtered via a respective channel filter and then recombined to form the signal to be transmitted, on which the CFR operations are then applied. The length of the cancellation pulse signal is less than the number of taps of the channel filter with the largest number of taps. This reduction in cancellation pulse signal length significantly reduces the processing power required to perform the CFR operations while maintaining regulatory emissions compliance.

The utility model belongs to the technical field of communication equipment, and particularly relates to a frequency division dual-channel filter, which comprises a cavity cover plate, a device cavity, a connector and a mounting bracket, the device cavity is of a hollow cuboid structure, and an opening is formed in the upper end face of the device cavity. The cavity cover plate is of a flat-plate-shaped structure matched with the opening and fixedly covers the opening in the upper end of the device cavity through evenly-distributed installation screws, and a sealed cavity is formed. According to the utility model, the large cavity design is adopted, and the insertion loss and standing-wave ratio index of a product are effectively improved, so that the transmission quality of communication signals is improved; two input ports and two output ports are arranged, so that when the device is connected with a dual-port device, the device can be connected through a jumper wire; the installation support is additionally designed, so that the product can be installed on a cabling rack, a cabinet or a platform, and installation and maintenance are convenient.

The present invention discloses a radio frequency transmitter based on a transformer-based N-channel filter modulator, which includes a baseband low-pass filter, an N-channel filter modulator, and a power amplification driver. The baseband low-pass filter includes N filtering units, and the N-channel filter modulator includes a transformer, a variable capacitor, a frequency divider, and N mixers; the input ends of the N filtering units are respectively connected to N input signals, the output ends of the N filtering units are respectively connected to the first input ends of the N mixers, the output ends of the N mixers are connected to the input end of the transformer, the output end of the transformer is connected to the second input ends of the N mixers and the input end of the power amplification driver, the N mixers are respectively driven by non-overlapping clocks generated by the frequency divider, and the two ends of the variable capacitor are respectively connected to the input end and the output end of the transformer. The embodiments of the present invention maintain a certain output power, reduce noise, improve linearity and integration, and can be widely applied to the field of communication technologies.

The utility model discloses a series power supply formula low -power consumption television receiving antenna signal amplifier circuit, including UHF signal input terminal anti -static and strong pulse circuit (1), UHF channel filter circuit (2), first -stage UHF channel amplification unit (3), second -stage UHF channel amplification unit (4). Further including amplifier UHF and VHF channel hybrid output circuit (11), VHF signal input terminal anti -static and strong pulse circuit (8), VHF channel filter circuit (9), power supply input rectifier filter circuit (6), voltage stabilizing and decoupling circuit (5), decoupling voltage division's front -stage series power supply circuit (7) and VHF amplification unit (10). Or including RF signal input channel filter circuit (13), first -stage RF channel amplification unit (14), second -stage RF amplification unit (15) and decoupling voltage division's front -stage series power supply circuit (7). The utility model discloses through series power supply mode, make the total current of amplifier equal the current of second -stage amplification unit, relative parallel type circuit saves nearly 50% power consumption, reduces the requirement to transformer power, thereby reduces the cost.

The invention discloses a miniaturized sheet metal strip line quadruplexer, and relates to the technical field of communication equipment, in the quadruplexer, an impedance matching network and four channel filters are arranged, two channel filters are respectively arranged at two sides of the impedance matching network, and the other two channel filters are parallel to the previous two channel filters. The impedance matching networks are arranged side by side behind the impedance matching networks. The impedance matching network and the four-channel filter correspond to five port connectors, so that a multiplexer structure with one input and four outputs is realized; the impedance matching network comprises a common strip line resonator, each channel filter comprises four strip line resonators connected side by side, the common strip line resonator is coupled with the first strip line resonator of each channel filter, and impedance matching between the impedance matching network and each channel filter is achieved. Compared with the prior art, the miniaturized sheet metal strip line quadruplexer provided by the invention has the advantages of miniaturization, easiness in integration, high performance and high reliability.

The invention discloses a planar sheet metal strip line quadruplexer, and relates to the technical field of communication equipment, in the quadruplexer, an impedance matching network and four channel filters are arranged, two channel filters are respectively arranged at two sides of the impedance matching network, and the other two channel filters are inversely arranged at two sides of the top end of the impedance matching network; the impedance matching network and the four channel filters correspond to the five port connectors respectively, so that a multiplexer structure with one input and four outputs is realized; the impedance matching network comprises a common strip line resonator, each channel filter comprises four strip line resonators which are connected side by side, and tuning screws with the corresponding number are arranged at the same time and can be used for adjusting the resonant frequency of the corresponding strip line resonators. The common strip line resonator is respectively coupled with the first strip line resonator of each channel filter, impedance matching between the impedance matching network and each channel filter is realized, and the antenna has the advantages of planarization, high performance, easy integration and high reliability.

The utility model relates to the technical field of filters, in particular to a light and thin multi-channel filter cavity, which comprises a filter cavity main body, and a mounting frame is fixedly connected to the center of each cavity of the filter cavity main body; the beneficial effects are that a plurality of lead screws are rotatably installed on the filter cavity main body, two installation bases which are symmetrically arranged with the lead screw as the center are in threaded insertion connection with the side surface of each lead screw, and a plurality of positioning grooves for insertion connection of resonance rods are formed in the installation bases; meanwhile, a plurality of fixing assemblies corresponding to the positioning grooves in position are arranged on the mounting base, the positioning grooves can be fixed through the fixing assemblies after the resonance rods are inserted into the positioning grooves, then the screw rod is rotated to enable the mounting base to be inserted into the inner cavity of the filter cavity main body in a sliding mode, and then each resonance rod corresponds to a screw hole; and at the moment, each resonance rod is very convenient to fix by using the screws.

The embodiments of the present application disclose a measurement method, device, baseband chip, terminal, and storage medium, belonging to the field of communication technology. The method includes: estimating channel parameters based on a reference signal to obtain a parameter estimation result; determining a target filter from at least two candidate filters based on the parameter estimation result; performing channel filtering processing on the reference signal using the target filter to obtain a reference signal filtering result, wherein the channel filtering processing is used to filter out interference and noise in the reference signal; and calculating a measurement item based on the reference signal and the reference signal filtering result. The method provided in the embodiments of the present application can improve the measurement accuracy on the terminal side.

The utility model relates to the technical field of surfactant production, and discloses a filtering and impurity removing device for surfactant production, which is characterized in that a multi-channel conveying structure consisting of three liquid outlet pipes, filter pipes and a liquid inlet pipe of an upper box body is arranged, and each filter pipe can be independently and alternately used, so that the parallel operation of online filtering and offline cleaning is realized; when the filter efficiency of the filter element in a certain filter pipe is reduced due to impurity accumulation, the flow sensor monitors the flow change of the liquid inlet pipe in real time, when the flow change is lower than a preset threshold value, the electromagnetic valve of the corresponding liquid outlet pipe is automatically triggered to be closed, the warning lamp synchronously sends out a maintenance prompt, and the other filter pipes still maintain normal filtration. The problem that a whole machine is shut down when a traditional single-channel filter element is maintained is avoided, the production continuity is remarkably improved, the filter pipe is rapidly disassembled through a fixing piece, a fastening screw and a ring groove sealing structure, the single-time maintenance time is greatly shortened compared with a traditional mode, it is guaranteed that no material leaks in the disassembling process through a sealing gasket, and the productivity loss and the labor cost are effectively reduced.

A user equipment, method and computer program for adjusting an effective center frequency of a channel filter in a user equipment to improve adjacent channel selectivity when a network transmits on an irregular bandwidth channel and the user equipment receives signals via a channel filter with a passband wider than the channel bandwidth. The method includes filtering a received wireless communication signal at the channel filter. A preferred center frequency of the channel filter is identified by: adjusting the center frequency of the channel filter; determining a level of adjacent channel selectivity of the signal filtered by the channel filter; comparing the levels of adjacent channel selectivity at different center frequencies of the channel filter; and identifying the preferred center frequency as the center frequency that provides the highest level of adjacent channel selectivity.

System for processing signals from a gyroscope (102), comprising: at least one drive channel (104) designed to receive an output from a drive axis (110) of the gyroscope (102), wherein the at least one drive channel (104) includes the following: a drive channel analog-to-digital converter (ADC) (112) which receives a drive signal from the drive channel (104) and outputs a digitized drive signal; a drive channel phase-correct demodulator (114) that receives the digitized drive signal and generates a phase-correct demodulated drive signal; at least one drive channel filter (118) that receives the phase-correct demodulated drive signal and outputs a filtered phase-correct demodulated drive signal; and a phase-locked loop (PLL); a detection channel (106) designed to receive an output from a detection axis (108) of the gyroscope (102), wherein the detection channel (106) includes the following: a capture channel ADW (124) that receives an analog rate signal from the capture channel (106) and outputs a digitized rate signal; and a digital signal processor (125) which includes the following: a detection channel phase-correct demodulator (126) that receives the digitized rate signal and generates a phase-correct demodulated rate signal; a capture channel quadrature-phase demodulator (128) that receives the digitized rate signal and generates a quadrature-phase demodulated rate signal; a first acquisition channel filter (130) that receives the phase-correct demodulated rate signal and outputs a filtered phase-correct demodulated rate signal; and a second acquisition channel filter (132) that receives the quadrature-phase demodulated rate signal and outputs a filtered quadrature-phase demodulated rate signal; and a digital subtraction circuit (134) that subtracts the filtered phase-correct demodulated drive signal from the filtered phase-correct demodulated rate signal to generate a sensing axis output signal.

The application discloses a miniaturized hybrid bridge coupling filter combining module based on a copper-based LTCC and belongs to the technical field of wireless communication, which comprises a ceramic block Sub, the inner bottom side of the ceramic block Sub is provided with a symmetrically distributed first quadrature hybrid bridge C1 and a second quadrature hybrid bridge C2; the inner top side of the ceramic block Sub is provided with a parallel first band-pass filter F1 and a second band-pass filter F2; the first quadrature hybrid bridge C1 and the second quadrature hybrid bridge C2 are located in the lower half of the ceramic block Sub, while the first band-pass filter F1 and the second band-pass filter F2 are located in the upper half of the ceramic block Sub; and the compact and miniaturized product design is realized by using the stacked structure of the hybrid bridge and the filter, and the technical problem that the realization of the hybrid bridge coupling filter combining module in the prior art contains two same 90° electric bridges and channel filters, thereby resulting in a large volume in the traditional cavity scheme is solved.

The invention discloses a multi-channel filtering device and method for food inspection, and relates to the technical field of food inspection equipment, the multi-channel filtering device comprises a bottom bracket, a bottom layer plate is fixed on the inner wall of the bottom bracket, a driving adjusting assembly is arranged in an inner cavity of the bottom bracket, and the driving adjusting assembly is mounted on the bottom layer plate; and a rotating tray is installed on the outer wall of the driving adjusting assembly, and five filtering assemblies are installed on the periphery of the top of the rotating tray. According to the multi-channel filtering device and method for food inspection, juice on food residues is thrown to the inner wall of the outer sleeve through filter paper and through holes by driving the rotating shaft to rotate clockwise, and the filtering speed can be increased; a rotating shaft is driven to rotate anticlockwise, so that a connecting rod, an inner connecting column and an outer plug move from the highest position to the lowest position, and residues can fall down through a funnel; through the arrangement of the five filter assemblies, different foods can be placed in the five filter assemblies, so that one device can filter various foods, and the five filter assemblies can synchronously discharge residues.

The application discloses a kind of detection method and system based on improved yolov5-SFF in the field of video identification, comprising: real-time video data is input into the Yolov5-SFF detection model pre-trained to obtain the detection result of worker operation behavior;The training process of Yolov5-SFF detection model includes: historical video data is collected, and training dataset is constructed;Using difference hash sampling algorithm, the frame picture of each group of historical video data is sampled and screened, and the operation behavior in the frame picture screened is labeled;Add channel filtering module and spatial attention module to backbone network, sequentially stack backbone network, head network, space-time feature fusion module and identification module to build Yolov5-SFF detection model;Using historical video data in training dataset to which operation behavior label is added, train Yolov5-SFF detection model, repeat training until the detection accuracy of Yolov5-SFF detection model tends to be stable;It improves detection and identification precision, and also guarantees the speed of algorithm real-time detection.

This invention belongs to the field of multi-beam antenna arrays and discloses a filtered multi-beam array and method based on a four-channel filter jumper. By integrating a microstrip-to-substrate integrated waveguide structure, a filter Butler matrix containing a four-channel filter jumper, and an antenna array on a first metal layer, a filtered multi-beam array based on a multi-layer planar structure is constructed. The four-channel filter jumper utilizes multiple resonant cavities and coupling structures, and by precisely controlling the coupling phase between the resonant cavities, a preset phase shift is directly introduced while achieving the filtering response, thus integrating filtering and phase-shifting functions into a single device. This design avoids the complex structure of filter couplers and the additional losses of filter phase shifters in traditional integrated schemes, significantly simplifying the device architecture, reducing transmission loss, improving system integration and beamforming accuracy, and effectively meeting the urgent needs of 5G and future 6G communication systems for high performance, low loss, and high integration.

The application discloses a broadband gain and frequency tunable high-Q filter, which comprises a low-noise amplifier unit and a differential N-channel filter unit, wherein the low-noise amplifier unit is a load-balanced low-noise amplifier with tunable gain, single-end input and differential output; the differential N-channel filter unit is driven by a four-phase clock with a phase difference of 90 degrees, and the four-phase clock input is connected with an externally input signal with a phase difference of 90 degrees; the input end of the low-noise amplifier is connected with an input signal of an antenna end, the output positive end of the low-noise amplifier is connected with the input positive end of the differential N-channel filter, and the output negative end of the low-noise amplifier is connected with the input negative end of the differential N-channel filter. On the basis of the high-Q filter, the application realizes the characteristics of single-end to double-end signal receiving, gain adjustment, filter center frequency tuning, low noise, high bandwidth, output differential balance and strong load capacity.

According to the multilayer dual-channel substrate integrated waveguide filter, a cross slot is formed in a metal substrate between adjacent SIW cavities, the intersection point of the cross slot is located in the center of the SIW cavity and located at the strongest magnetic field position of a TE102 mode and a TE201 mode, the TE102 / TE201 mode and a TE101 mode can be physically segmented, the isolation degree is improved, and meanwhile, the cross slot is formed in the metal substrate between the adjacent SIW cavities; according to the invention, a multi-layer structure is adopted, strong coupling and energy transmission of two orthogonal modes TE102 and TE201 can be realized, and the unique orthogonal mode coupling mechanism is combined with the multi-layer structure, so that the structure shows good frequency selection characteristics and high channel isolation while keeping a compact size, and mode interference and crosstalk of a traditional multi-channel filter do not exist; and a high-performance dual-passband filtering function is realized.

A remote sensing satellite data transmission subsystem based on multi-stage noise suppression comprises a data transmission integrated intelligent terminal, a multi-stage high-suppression-performance channel filter, an adjustable suppression degree phased array antenna, power supply and control equipment; the signal output by the data transmission integrated intelligent terminal is transmitted through the adjustable suppression degree phased array antenna after being filtered by the multi-stage high-suppression-performance channel filter; the power supply and control equipment is used for power supply and data transmission with the data transmission integrated intelligent terminal and the adjustable suppression degree phased array antenna respectively; the multi-stage high-suppression-performance channel filter suppresses the sensitive frequency band of the data transmission subsystem through its own multi-stage coaxial cavity and tuning screw; the adjustable suppression degree phased array antenna suppresses the sensitive frequency band of the data transmission subsystem by setting resonators in its own filtering module.

The embodiment of the invention discloses a gas concentration detection method and device based on orthogonal phase locking, and the method comprises the steps: obtaining original data, and respectively generating a first reference signal and a second reference signal which are orthogonal to each other based on the original data; performing multiplication operation on the original data and the first reference signal to obtain I-channel original data, and performing multiplication operation on the original data and the second reference signal to obtain Q-channel original data; performing low-pass filtering on the I-channel original data and the Q-channel original data to obtain I-channel filtering data and Q-channel filtering data; calculating an I channel average value and a Q channel average value of the non-gas absorption interval; obtaining I channel correction data and Q channel correction data according to the I channel average value and the Q channel average value; and performing modulo operation on the I channel correction data and the Q channel correction data to obtain second harmonic absorption characteristics corresponding to the to-be-detected gas. By applying the scheme provided by the embodiment of the invention, the accuracy of gas concentration detection can be improved.