201 results about "Signal intensity" patented technology

This invention relates to a method, apparatus, equipment, and computer storage medium for three-dimensional pipeline positioning, belonging to the field of underground pipeline detection technology. The three-dimensional pipeline positioning method includes: acquiring multiple real acoustic wave reflection signals reflected by the pipeline to be located; determining the extension direction of the pipeline based on the signal intensity of the multiple real acoustic wave reflection signals; constructing a three-dimensional soil-pipeline model including the depth of the pipeline to be located; and acquiring simulated acoustic wave reflection signals from simulated acoustic wave acquisition points in the three-dimensional soil-pipeline model when the pipeline is at different depths; the simulated acoustic wave acquisition points correspond to the acquisition points of the real acoustic wave reflection signals; and determining the depth of the pipeline to be located based on the correlation between the simulated acoustic wave reflection signals and the real acoustic wave reflection signals. This invention can accurately locate underground pipelines.

The application relates to the technical field of image communication, in particular to a presence measurement method and system of a peripheral base station based on channel measurement, which comprises collecting multimedia interaction signals sent by a user interaction terminal, collecting interaction characteristic sampling data containing phase information and perception parameters; calculating an angle of arrival (AoA) based on the interaction characteristic sampling data, obtaining distance information based on the perception parameters, fusing signal strength indication, and generating space parameters; extracting multipath characteristics based on the interaction characteristic sampling data, judging a viewing direction state of a user; matching the space parameters with a multimedia visual area model, performing time sequence fusion on the space parameters within a preset time window, and calculating a confidence degree in combination with the viewing direction state of the user; when it is detected that multiple user interaction terminals are simultaneously in a presence state, generating a viewer presence event, mapping the viewer presence event and an interaction event of the user interaction terminal into a multimedia control instruction, and transmitting the multimedia control instruction to the smart television.

The application belongs to the technical field of low-altitude aircraft detection, and particularly relates to a static electricity radar device for low-altitude aircraft detection and a working method thereof. The device comprises: a metal spherical shell configured to be grounded; an insulating material arranged on the surface of the metal spherical shell; a plurality of static electricity sensing electrodes embedded in the insulating material, the plurality of static electricity sensing electrodes being arrayed on the surface of the metal spherical shell, and the normal directions of the plurality of static electricity sensing electrodes converging at the geometric center of the metal spherical shell; and a signal processing module comprising a gating unit, a conditioning unit and a processing unit. The gating unit is connected to the static electricity sensing electrodes and is used for selecting specified static electricity sensing electrodes to be connected to subsequent circuits in time. The conditioning unit is configured to convert the induced charge signals into voltage signals and amplify and filter the voltage signals. The processing unit receives the digitized static electricity signals, and analyzes the spatial pose information of the low-altitude aircraft according to the signal intensity difference of different static electricity sensing electrodes. The spatial positioning of the low-altitude aircraft is realized by using the static electricity sensor array.

Embodiments of the present application provide a structured light camera parameter correction method, device, storage medium and program product. The method corrects the light source output intensity of the structured light camera based on the collected image when the brightness difference degree of the image collected by the structured light camera is greater than or equal to a brightness difference degree threshold, to compensate for the brightness of the underexposed area and / or suppress the brightness of the overexposed area; until the brightness difference degree of the image collected by the structured light camera is less than the brightness difference degree threshold, the corrected light source output intensity is determined as the final light source output intensity, which can supplement the effective signal intensity of the edge and both sides of the field of view, suppress the effective signal intensity of the center area of the field of view, make the brightness values in the full field of view range consistent, solve the problem of uneven brightness distribution of the field of view, and improve the imaging integrity while meeting the timeliness requirements of industrial real-time imaging.

This invention specifically relates to a performance testing method for laser cladding repair, encompassing the fields of laser additive manufacturing and non-destructive testing. The method includes: screening tracer particles based on three criteria: high physical field contrast, high-temperature thermal stability, and rheological compatibility; determining the tracer particle ratio; preparing uniform composite powder; verifying mixing uniformity; and standardizing powder pretreatment and storage. In this invention, tracer particles with high physical field contrast are introduced, and a direct mapping model between signal intensity and dilution rate is constructed using the law of conservation of solute mass. Normalization calculations eliminate interference from instrument response coefficient drift, enabling the method to penetrate the cladding layer surface and directly quantify the component mixing ratio within the molten pool. This not only achieves a leap from qualitative judgment to quantitative measurement but also replaces fuzzy empirical judgments with explicit physical laws, providing a non-destructive, high-confidence, and fully physically interpretable in-situ characterization method for laser repair quality.

This invention provides a CD147-targeting nano-ultrasound contrast agent, its preparation method, and its application. The contrast agent comprises: microbial-derived gas vesicles and CD147 nanoantibodies linked to the surface of the gas vesicles via a coupling agent. The hollow nanostructure of the gas vesicles in this invention endows the contrast agent with highly efficient acoustic reflection capabilities, significantly improving the ultrasound signal intensity. The CD147 nanoantibodies possess high affinity and high specificity, enabling precise recognition of the CD147 antigen on the surface of tumor cells. This invention uses biosynthesized gas vesicles instead of traditional chemically synthesized gas microbubbles, combined with a simple and efficient coupling process, significantly reducing preparation difficulty and equipment dependence. The contrast agent of this invention overcomes the shortcomings of existing technologies in imaging performance, targeting, preparation process, safety, and multifunctional diagnostic and therapeutic capabilities, providing a novel technical pathway for precision diagnosis and treatment of tumors.

This invention discloses a method, apparatus, device, and medium for demodulating optical tag signals, relating to the field of optical signal modulation. The method includes: acquiring a preset reference value for the intensity of the demodulated optical tag signal; performing target frequency filtering on the optical tag signal to be demodulated to obtain a filtered optical tag demodulated signal containing only the target frequency; comparing the intensity of the filtered optical tag demodulated signal containing only the target frequency with the preset reference value; and determining, based on the comparison result, whether the wavelength of the optical channel corresponding to the optical tag signal to be demodulated has deviated. This achieves low-cost, high-reliability processing of optical tag signals, effectively adapting to the low computing power characteristics of embedded microprocessors. Furthermore, it allows for rapid and accurate determination of whether the wavelength of the optical channel has deviated based on the comparison result of the demodulated signal intensity and the preset reference value, significantly improving the monitoring reliability, engineering feasibility, and application adaptability of dense wavelength division multiplexing systems based on micro-rings.

The application provides a real-time processing and analysis method for magnetic resonance scanning data, comprising: capturing the change process of intravascular contrast agent concentration and magnetic resonance signal intensity with time and the spatial distribution of magnetic field uniformity in real time, and identifying the signal attenuation amplitude and signal intensity decline rate caused by T2 star effect; for the determined arterial phase time starting point, combining the signal enhancement amplitude caused by T1 effect and the signal attenuation amplitude caused by T2 star effect, continuously monitoring the peak arrival time and peak duration in the signal intensity change process, and evaluating the optimal duration of the acquisition time window; according to the evaluated optimal duration of the acquisition time window, generating a trigger signal when the T1 effect is dominant and the T2 star effect has not yet significantly affected the signal intensity, activating the image acquisition of the scanning system, and obtaining pure arterial phase images.

This invention provides a full-link detection device and method for laser interferometric velocimetry systems, relating to the field of transient photoelectric testing technology. The detection device includes a pulse injection module, a signal transmission and conversion module, and a signal acquisition and analysis module. The pulse injection module includes a nanosecond pulse laser and a coupler. The coupler is connected in series between the output end of the fiber laser and the first port of the circulator. The nanosecond pulse laser, after being coupled by the coupler, is transmitted along the entire system link and converted into an electrical signal by a photodetector. The data acquisition unit acquires the signal, and the analysis unit analyzes the characteristics of the electrical signal to achieve full-link status detection. This invention can identify and locate fiber optic path breaks, determine the working status of the fiber optic probe, and predict the intensity of the interference signal in the formal experiment. Even after the system is fully solidified before the experiment, it can still monitor the entire link status in real time, effectively improving the operational reliability and efficiency of the laser interferometric velocimetry system.

This application discloses a method for testing the orientation of the main reference plane of a silicon carbide crystal. The method includes: 1) selecting the (11-28) crystal plane as the reference plane and calculating the Bragg diffraction angle θ of the crystal plane; 2) adjusting the X-ray orientation system, selecting a normal so that the intersection of the incident ray and the reflected ray emitted by the orientation system is focused on the center point of the top surface of the silicon carbide crystal; the angle between the incident ray and the (11-28) crystal plane and the angle between the reflected ray and the (11-28) crystal plane are both θ, the plane containing the incident ray and the reflected ray is parallel to the (1-100) crystal plane of the silicon carbide crystal, and the X-ray orientation system displays a first signal intensity value; 3) then rotating the test stage, when the signal intensity value displayed by the X-ray orientation system is the largest relative to the first signal intensity value, the angle of rotation of the test stage is the deviation value of the orientation of the main reference plane of the silicon carbide crystal. This method is applicable to silicon carbide crystals of different thicknesses, filling the gap in testing silicon carbide substrates and broadening the detection range.

This application provides a signal monitoring method, electronic device, and computer storage medium. The method acquires signal monitoring data such as ultrasonic signal waveform and / or ultrasonic signal intensity reported by an ultrasonic gas meter. Based on this signal monitoring data, it performs anomaly monitoring on the ultrasonic signal waveform and / or ultrasonic signal intensity and issues anomaly alarms. It can monitor signal quality anomalies from the dimensions of signal waveform and / or signal intensity. Compared with signal monitoring based on gain data, whether it is anomaly monitoring of signal waveform, anomaly monitoring of signal intensity, or anomaly monitoring of both signal waveform and signal intensity simultaneously, it can reduce false alarms and missed alarms of signal anomalies to varying degrees, improve the accuracy of signal monitoring, and thus improve the accuracy of measurement.

The application discloses an underground space unmanned sensing and detecting system and method, wherein an unmanned detecting carrier platform acquires underground space surface layer data through a sensing radar holder and a unmanned aerial vehicle; then, the detecting target area is determined and the driving path is planned according to the acquired data; meanwhile, the unmanned detecting carrier platform places self-organizing network relay nodes at different positions through a mechanical arm and in combination with signal strength, so that a self-organizing network is finally formed, and the communication between the unmanned detecting carrier platform and the unmanned aerial vehicle in the underground space is ensured to be normal; when the unmanned detecting carrier platform drives to the target area, a seismic observation system is formed through the laid node type detector, and an active seismic source and a transient electromagnetic detecting device are started respectively, so that the seismic wave data and the transient electromagnetic data of the target area are acquired; the application can realize the sensing modeling of the underground space in an unmanned mode, and can also accurately acquire the detecting data of the whole underground space, thereby being convenient for the subsequent analysis and processing of the underground space data.

The application discloses a method and device for determining the vibration state of an interferometric profiler and a measuring system. The method comprises: in response to a collection instruction, controlling a signal collection module in the interferometric profiler to collect multiple frames of interference signals; obtaining signal intensity difference values between adjacent signals in the multiple frames of interference signals, and comparing the signal intensity difference values; determining a vibration coefficient according to the comparison result, and determining the collection frequency of the interference signals; and determining the vibration state of the interferometric profiler based on the vibration coefficient and the collection frequency. The method uses the signal collection device of the interferometric profiler to collect interference signals for measurement, thereby reducing the cost without adding additional equipment, and solving the technical problem of being unable to accurately monitor vibration data in real time.

This invention discloses a method for analyzing the internal bonding strength of chemimechanical pulp fibers based on two-dimensional correlation near-infrared spectroscopy. The method includes the following steps: preparing chemimechanical pulp fiber samples with different internal bonding strengths and manipulating them into hand-made sheets; equilibrating the moisture content of the hand-made sheets under different relative humidity conditions; acquiring the near-infrared dynamic spectrum of the hand-made sheets in order of increasing relative humidity; performing two-dimensional correlation analysis on the dynamic spectrum to obtain the autocorrelation spectrum; and calculating the ratio of the signal intensity at wavelengths of 1394 nm and 1465 nm as the relative intensity I. 1394 / 1465 Test the bonding strength within the handwritten sheet according to standard methods, and calculate the test value and I. 1394 / 1465 The relationship curve of values; obtain I for the sample to be tested according to the above steps. 1393 / 1465 After obtaining the value, the fiber bond strength can be calculated by substituting it into the relationship curve. This invention enables efficient and non-destructive analysis of the strength performance indicators of pulp samples.

The application discloses a kind of microwave rain measurement dynamic reference signal adaptive determination method and device based on deep learning, first synchronous acquisition microwave link's received signal strength and equipment state parameter;Based on historical rain-free period data, train the LSTM time series prediction model of fusion equipment state characteristics, establish the mapping relationship of signal period law and equipment state;Through real-time calculation residual sequence of predicted signal and observation signal, combined with equipment state parameter mutation monitoring, realize the collaborative diagnosis and identification of equipment state anomaly;Based on the identification result driving dual abnormality rejection mechanism, comprehensively utilize event window rejection and isolated forest algorithm to generate high-quality effective data set;Through the double-mode strategy of conventional gradual updating and mutation response recalibration, dynamically maintain prediction model parameters and synthesize optimal reference signal;Finally output dynamic reference signal that can adapt to equipment aging, environmental change and sudden interference, provide stable reference for long-term reliable rainfall attenuation calculation.

The application discloses a coal mine slope slip identification method and system based on radar monitoring, and belongs to the field of coal mine slope slip identification. The method comprises the following steps: obtaining phase difference information in a denoising radar signal data set, calculating a millimeter-level displacement vector of a slope surface through interference measurement, and determining a micro-deformation information distribution map; fusing geological complex parameters for the micro-deformation information distribution map, classifying deformation feature types by using a support vector machine algorithm, and judging which deformation features belong to abnormal inclination changes; if the abnormal inclination changes exceed a preset threshold, extracting time sequence data from the micro-deformation information distribution map to obtain an inclination change trend sequence; comparing the inclination change trend sequence with historical slip hidden danger data, predicting a dynamic evaluation index by using a support vector machine algorithm, and determining an early signal strength level; integrating a stability analysis model according to the early signal strength level, and generating a slip hidden danger probability distribution map and a risk identification report.

This invention discloses a method for screening catalysts for the oxygen evolution reaction based on electrochemiluminescence quenching. The catalyst to be tested is loaded onto the working electrode, and then Ru(bpy)3 is added. 2+ In the electrolyte of / Hepes, applying an anodic potential to excite ECL accelerates the OER to generate O2, and O2 quenches the ECL signal. The signal intensity is negatively correlated with the catalytic activity. This method can be used for parallel detection on a single-electrode imaging array, achieving high throughput, visualization, and quantitative screening. It is applicable to various OER catalysts such as polyoxometalates and oxides, and has the advantages of being fast, low-cost, and easy to operate.

The application belongs to the field of metal organic framework materials (MOFs), and particularly relates to an amino-functionalized UIO-66 (Zr) and a preparation method and application thereof. The application mainly utilizes an amino ligand containing an aminobenzoic acid group and UIO-66 (Zr) to form a complex, which has good binding capacity with azoxystrobin and other pesticide molecules and saccharide substances, and can reduce the ultraviolet band gap value, so as to improve the laser desorption / ionization efficiency of the analyte. Compared with the mass spectrum peak intensity of the organic matrix, the amino-functionalized UIO-66 (Zr) material shows lower noise and detection limit and higher signal intensity in the MALDI-TOF-MS detection, which is beneficial to realize high-sensitivity and high-throughput detection of pesticides and saccharide substances.

This invention discloses a method for noise reduction and electrode placement optimization in a single-arm electrocardiogram (ECG) system, comprising the following steps: Step S1: Acquiring electromyographic (EMG) signals at multiple preset electrode positions on the upper arm of the subject, and obtaining EMG signal intensity data and EMG signal stability data for each electrode position; Step S2: Determining one or more electrode positions with lower EMG signal intensity and better signal stability from the multiple preset electrode positions, and using the one or more electrode positions as the initial electrode arrangement; Step S3: Acquiring the subject's motion state data in real time while the subject is in motion; Step S4: Dynamically selecting electrode channels with fewer EMG signals in the current motion state from the initial electrode arrangement for ECG signal acquisition. This invention can reduce the introduction of EMG signals at the source, ensuring high-quality and stable ECG signals can be obtained in different individuals and under various motion states.

The application relates to a multi-marker detection method of aptamer-antibody dual recognition coupling three-dimensional inverse opal hydrogel photonic crystal fluorescence enhancement, and belongs to the field of analytical chemistry and biomedical technology. Specifically, first, SiO2 nanoparticles with different particle sizes are synthesized to prepare a photonic crystal PhCs template, hydrogel precursors are permeated into the PhCs gap to obtain three-dimensional IOPCHs with different structural colors, then different target antibodies are modified to the surfaces of the different IOPCHs to realize specific recognition and enrichment of multiple targets. The detection part adopts a pre-constructed Aptamer-HCR compound, when the target is captured by the antibody fixed on the IOPCH surface, the corresponding compound directly combines the target through the aptamer, so that the amplified fluorescence signal is anchored on the IOPCH with a specific color, the PBG effect of the IOPCHs can inhibit non-radiative fluorescence decay, and the signal intensity is significantly enhanced, and the detection sensitivity is improved.

The present application relates to the field of fire alarm technology, and more particularly to a fire smoke concentration real-time detection and early warning method and system, comprising: in a smoke-free detection cavity environment, collecting and recording the background value of the detection light signal intensity of each direction and each wavelength of each point, and recording the time synchronization information of detection light emission and signal collection. The present application collects the motion and coagulation state parameters of smoke particles and generates characteristic parameters in the time-space dimension, combines the dynamic correction model of light scattering efficiency to perform regional dynamic correction on the scattered light signal, accurately eliminates the scattering deviation caused by particle motion and coagulation, makes the light signal data linearly correspond to the actual particle mass concentration, solves the problem that the light signal and the actual particle quantity cannot be accurately matched and the concentration detection has dynamic deviation due to the dynamic behavior of particles in the prior art, and solves the technical limitations of conventional fixed correction.

This application discloses a method for detecting trace oxygen elements based on an electron probe microanalyzer, relating to the field of analytical detection technology. The method includes: placing the sample to be tested in the electron probe microanalyzer to obtain the signal intensity of oxygen and the signal intensity of major elements in the sample; obtaining the theoretical standard content of oxygen in a standard sample calculated by the built-in calculator of the electron probe microanalyzer; determining a total correction factor based on the signal intensity of oxygen and the signal intensity of major elements; and determining the oxygen content in the sample based on the total correction factor, the theoretical standard content of oxygen in the standard sample calculated by the built-in calculator, and the signal intensity of oxygen. This application solves the technical problem of insufficient accuracy in detecting trace oxygen content in samples using electron probe microanalyzers.

This invention discloses a spatiotemporal synchronous high-precision positioning method and system based on multi-sensor fusion, belonging to the field of positioning technology. The method includes the following steps: Step 1: Acquiring images from a visible light camera, a 3D point cloud coordinate image from a ToF depth camera, angular velocity and acceleration from an inertial measurement unit, and wireless signal strength from a wireless signal module; Step 2: Based on a pre-calibrated homogeneous transformation matrix, reprojecting the 3D point cloud coordinate image acquired by the ToF depth camera onto the image plane of the visible light camera to obtain spatially aligned coordinates; Step 3: Based on the signal strength indication received by the wireless signal module, calculating and correcting the distance observation value using a nonlinear ranging model to obtain the corrected distance observation value. This invention effectively solves the inherent defects of single-sensor positioning in complex environments through a complete spatiotemporal synchronization and multimodal data fusion framework.

The embodiment of the application provides a dot array test paper analysis method and related equipment, and belongs to the technical field of data processing. The method comprises the following steps: acquiring a dot array test paper image; segmenting the dot array test paper image through a segmentation network model to obtain a dot array detection region image and a background region image, and calculating target signal intensity data corresponding to the dot array detection region image according to the dot array detection region image and the background region image; inputting the dot array detection region image and the target signal intensity data corresponding to the dot array detection region image into a test paper identification model to calculate a concentration prediction result corresponding to the dot array test paper image; the test paper identification model integrates multiple decision trees through a gradient boosting framework, and adopts a regularization objective function to control the model complexity of the test paper identification model. The embodiment of the application can have excellent generalization ability and robustness while maintaining high prediction accuracy.

The application provides a four-channel Fabry-Perot frequency discrimination module closed-loop feedback control system, which comprises a laser, a four-channel Fabry-Perot frequency discrimination module and a control module; the four-channel Fabry-Perot frequency discrimination module comprises three optical channels composed of Fabry-Perot etalons and a fourth channel allowing laser to be completely transmitted; two of the three optical channels are used as frequency discrimination channels, and the other one is used as a locking channel; the locking channel and the fourth channel respectively receive laser signals emitted by the laser and transmit the transmitted laser signals to the control module; the control module calculates the transmittance of the locking channel according to the signal intensity of the laser signals transmitted through the two channels, and generates a driving signal according to the preset transmittance to adjust the mirror distance of the three optical channels, so as to realize the locking of the transmittance of the locking channel. The application effectively reduces the influence of laser frequency jitter, external environmental temperature change and vibration factors on frequency discrimination, and improves the frequency discrimination precision and reliability.

This application discloses a sample detection system and method, applied in the field of spectral analysis technology. The system includes a light projection module, a sample carrier, a signal acquisition module, and a sample detection module. The light projection module emits a laser signal of the target wavelength and focuses it onto the sample to be tested on the sample carrier. The signal acquisition module uses a front-facing light-receiving probe and at least one side-facing light-receiving probe to acquire Raman scattering and Rayleigh scattering signals generated by the sample to be tested. The sample detection module performs spectral composition analysis on the acquired scattered light signals from the sample to obtain the Raman scattering spectrum, and detects the sample based on the Raman scattering spectrum. This application overcomes the drawback of weak signal intensity in related technologies, effectively improving Raman signal intensity, especially for rough samples, enabling efficient and accurate detection.

The present application relates to a kind of dual optical path nitrogen dioxide measurement system and method based on blue laser, using dual-wavelength laser cavity enhanced absorption spectroscopy technology, carries out NO2 absorption measurement under 405nm and 410nm wavelength, and combined with high reflectivity optical resonator, improve detection precision and sensitivity.Through dual-wavelength comparison method, using dual-wavelength absorption spectroscopy analysis, calculate absorbance difference, to effectively eliminate the influence of environmental factors on measurement accuracy, improve measurement reliability.Using more than 99.9% high reflectivity mirror, to realize high reflectivity optical resonator enhancement technology, laser is reflected in resonator multiple times, optical path is extended hundreds of times, improve NO2 absorption signal intensity, realize ppb grade ultra-low concentration measurement.Compared with traditional optical method, the system has lower cost, higher accuracy and stronger environmental adaptability, provides an efficient, stable solution for atmospheric pollution monitoring.