39 results about "Single excitation" patented technology

The invention belongs to the technical field of nondestructive testing, and relates to a method for imaging residual oil in a powder metallurgy component based on pulse thermal excitation, which comprises the following steps: applying preheating disturbance pulse to a target area to generate a pre-excitation thermal field; applying a main detection pulse to the same target area at an interval of a preset time lag, and generating a transient composite hot spot; obtaining the whole process from formation to cooling dissipation of the transient composite hot spot, and generating a dynamic thermal field image sequence; images in a specific time window are extracted, and a key stage hot spot evolution image set is generated; the physical state of residual oil in the target area is judged, and a residual oil state label is generated; performing mapping association on the residual oil state label generated at each detection position and the two-dimensional coordinate of the residual oil state label to generate a residual oil state visual image; according to the invention, the problem of missing detection or misjudgment caused by difficulty in effectively amplifying weak thermal physical property difference between oil liquids in different states due to single excitation mode in the existing thermal imaging technology is solved.

The invention discloses a non-intrusive sensor with an external excitation source and a voltage measurement method, and the non-intrusive sensor comprises an induction signal collection unit, an induction signal conditioning unit, and a main control unit. The main control unit is respectively connected with the induction signal conditioning unit and the cable power supply, the induction signal conditioning unit is connected with the induction signal acquisition unit, and the induction signal acquisition unit is in non-contact inductive coupling connection with a cable to be detected; the main control unit is used for injecting the specific excitation signal into an alternating current loop of a cable power supply to form a composite signal, analyzing the composite signal based on a preset excitation source amplitude parameter, and calculating the power supply voltage of the to-be-detected cable; the induction signal acquisition unit generates a corresponding induction signal by capturing electric field energy generated by a composite signal in the to-be-detected cable; the induction signal conditioning unit carries out standardization processing on the induction signal. According to the invention, the technical problems of low external excitation voltage measurement precision, low system integration and single excitation source generation mode in the prior art are solved.

The invention discloses a method for quantitatively evaluating the three-dimensional shape of a thinning defect in a plate under ultrasonic guided wave field undersampling scanning, belongs to the field of industrial nondestructive testing, and particularly relates to high-precision three-dimensional shape reconstruction and thickness loss quantification of a corrosion defect in a metal plate shell structure (such as aerospace skin, a pressure vessel wall, an oil pipeline and the like). According to the method, sparse sampling guided wave field reconstruction, full waveform inversion (FWI) and priori knowledge constraint are fused, Shannon sampling theorem limitation is broken through, efficient measurement of corrosion depth, contour and distribution under the conditions of a single excitation source and a limited view angle is achieved, and the method is suitable for rapid online detection in a complex industrial environment.

The invention discloses a method and a system for determining reaction activity of material molecules based on quantum computing, and relates to the technical field of material performance analysis based on quantum computing, the method comprises the following steps: generating UCCSD (Unified Conduction Cancellation Spectroscopy) simulation of target material molecules, which comprises a plurality of double-excitation operators and single-excitation operators; calculating a relative contribution estimated value of each double-excitation operator to a molecular ground state energy level by adopting an approximation method; screening operators with estimated values higher than a threshold value or selecting the first N operators as key double-excitation operators in sequence; the UCCSD is combined with all the single excitation operators to form final UCCSD simulation; and constructing a quantum circuit based on the configuration, and further determining the molecular reaction activity. By approximately calculating the relative contribution estimated value and screening the key double-excitation operator, the calculation precision is ensured while the resource consumption is remarkably reduced, so that the reaction activity of the material molecules is reliably determined, and the defect that the efficiency and the precision are difficult to consider at the same time in the prior art is overcome.

The invention discloses a near-infrared two-region dual-channel fluorescent nanoprobe as well as a preparation method and application thereof, and relates to the technical field of biomedical imaging. A nano probe A and a nano probe B included in the near-infrared two-region dual-channel fluorescent nano probe are both of a core-shell structure, two NIR-IIb fluorescent nano probes adaptive to different excitation wavelengths (808 nm and 980 nm) are constructed by precisely regulating and controlling the types and proportions of lanthanide elements, dual-channel imaging is achieved, limitation of a single excitation wavelength is broken through, spectral crosstalk is eliminated, and the near-infrared two-region dual-channel fluorescent nano probe has the advantages of high sensitivity, high sensitivity, high sensitivity and the like. The method has the characteristics of material uniformity and biological safety. The near-infrared IIb region dual-channel imaging system has the characteristics of high temporal-spatial resolution and signal separation, and has significant application value in the field of living body multi-target synchronous observation. Compared with a traditional two-photon microscope technology, the imaging method has a wider observation view field, a local craniotomy operation does not need to be carried out on an experimental mouse, and physiological trauma is remarkably reduced.

The application belongs to the technical field of tunnel geological advanced prediction, and provides an electromagnetic controllable excitation device and method for longitudinal and transverse wave excitation of a deep-buried tunnel. The excitation device comprises a body, longitudinal and transverse wave excitation plates arranged on the body, and a rotating mechanism arranged on the body. The longitudinal and transverse wave excitation plates are perpendicular to each other, and the rotating mechanism is connected with a mechanical arm. The rotating mechanism is used to realize the operation switching of the longitudinal and transverse wave excitation plates at the same physical position, and longitudinal and transverse wave excitation is performed. The longitudinal and transverse wave excitation functions are integrated in a single excitation device, the structure is compact, and the device is suitable for operation requirements in a narrow space area in a tunnel. The rotating mechanism is used to realize 90-degree rapid switching, the detection efficiency is greatly improved, the physical positions of two times of excitation are completely consistent, and the data comparability is improved.

The invention belongs to the technical field of tunnel geology advanced prediction, and provides an electromagnetic controllable excitation device and method for longitudinal and transverse wave excitation of a deep tunnel, a vibration exciter comprises a body, a longitudinal wave excitation plate and a transverse wave excitation plate which are arranged on the body, and a rotating mechanism arranged on the body; the longitudinal wave excitation plate and the transverse wave excitation plate are perpendicular to each other, and the rotating mechanism is connected with the mechanical arm. Operation switching of the longitudinal wave excitation plate and the transverse wave excitation plate at the same physical position is realized through the rotating mechanism, and excitation of longitudinal waves and transverse waves is carried out; the longitudinal wave excitation function and the transverse wave excitation function are integrated into a single vibration exciter, the structure is compact, the device meets the operation requirement of a narrow space area in a tunnel, 90-degree rapid switching is achieved through the rotating mechanism, the detection efficiency is greatly improved, it is ensured that physical positions of two times of excitation are completely consistent, and the data comparability is improved.

The amplitude-change pole comprises a large beam and a small beam, the large beam is a straight beam, the center line of the large beam extends along the Z axis, and a threaded blind hole is formed in the rear end face of the large beam in the Z-axis direction and used for fixing a piezoelectric ceramic set; the small beam is a Y-Z plane inclined beam, the center line of the small beam is located on the Y-Z plane and forms a certain angle with the Z axis and the Y axis, and a rectangular section groove and a threaded through hole are formed in the front end of the small beam and used for installing and fixing a turning tool. The large beam is connected with the small beam through an interface; a flange is arranged in the middle of the girder, and through holes which are evenly distributed along the circumference are formed in the flange and used for fixing the amplitude-change pole to a rack. Two-dimensional elliptical vibration turning can be achieved only through a single excitation source, a control system is simple, phase difference regulation and control are not needed, the size is small, and cost is low.

The application provides a kind of single excitation-receiving module-based speed measurement positioning system, comprising: first, second zero flux coil assembly, excitation receiving module, power supply and signal processing unit, excitation receiving module includes excitation coil, first receiving coil and second receiving coil, excitation coil is set on the first zero flux coil assembly, first receiving coil and second receiving coil are symmetrically set relative to the center line of excitation coil, first receiving coil and second receiving coil are spaced apart on the second zero flux coil assembly, power supply is used to provide direct current to excitation coil, signal processing unit is connected with excitation receiving module, signal processing unit is used to complete the speed measurement and positioning of train according to the first receiving induction voltage of first receiving coil and the second receiving induction voltage of second receiving coil. The technical scheme of the application is used to solve the technical problems of complex speed measurement positioning equipment and large high-speed measurement error in the prior art.

This disclosure relates to the field of insulating material testing, including a method and system for evaluating the nonlinear strength of insulating materials based on high-frequency component analysis. The method involves applying an excitation electrical signal of a first preset frequency to the insulating material under test; acquiring the response signal obtained by the insulating material in response to the excitation electrical signal based on a second preset frequency; performing time-frequency transformation on the response signal to obtain the frequency characteristics of various preset higher harmonic components; and determining the evaluation result of the nonlinear strength of the insulating material based on the frequency characteristics of these higher harmonic components. This method allows for obtaining the evaluation result of the nonlinear strength with a single excitation and response acquisition; it eliminates the need for multi-voltage point step testing in traditional techniques, shortening the testing cycle, improving testing efficiency, and enabling efficient, accurate, and standardized determination of the nonlinear strength evaluation result.

The invention provides a defect distribution detection method for an optoelectronic semiconductor device. The method comprises the following steps: S1, injecting a single excitation source with constant parameters into the optoelectronic semiconductor device; s2, the optoelectronic semiconductor device emits light under the single excitation source with the constant parameters, and a light-emitting intensity distribution image, relative light-emitting intensity data phi xy, rel of each pixel point in light-emitting intensity distribution and a light-emitting spectrum phi (N) of the device are obtained; s3, calculating quantum efficiency spectrum distribution at any coordinate position xy in the luminous intensity distribution image of the optoelectronic semiconductor device; s4, calculating carrier collection rate distribution of different layer depths of the optoelectronic semiconductor device according to the quantum efficiency spectrum distribution; s5, calculating the spatial distribution of excessive and minority carriers of different layer depths of the optoelectronic semiconductor device according to the carrier collection rate distribution; and S6, obtaining defect distribution of different layer depths of the optoelectronic semiconductor device. Therefore, the defect distribution of different layer depths can be inverted only by depending on the light-emitting image of the optoelectronic semiconductor device under a single injection condition, and the method has the advantages of simplicity and convenience in operation, low cost and rapidness.

A quantum information system comprising a quantum information element and a control line, the quantum information element comprising: a first Josephson element and a second Josephson element, each Josephson element comprising a Josephson junction disposed between two superconducting islands, one of the superconducting islands is shared by the first Josephson element and the second Josephson element; wherein the superconducting island of the first Josephson element is coupled to the superconducting island of the second Josephson element such that the quantum information element comprises a plurality of states, the plurality of states comprising a first state, a second state, and a third state, where there is a single excitation transition between the third state and the first state, and there is a single excitation transition between the third state and the second state; and wherein the control line is configured to encode one of two states of the computing subspace into the quantum information element, a first state of the computing subspace corresponding to the first state, and a second state of the computing subspace corresponding to the second state.

In one aspect, the present teachings provide a system for performing cytometry that can be operated in three operational modes. In one operational mode, a fluorescence image of a sample is obtained by exciting one or more fluorophore(s) present in the sample by an excitation beam formed as a superposition of a top-hat-shaped beam with a plurality of beams that are radiofrequency shifted relative to one another. In another operational mode, a sample can be illuminated successively over a time interval by a laser beam at a plurality of excitation frequencies in a scanning fashion. In yet another operational mode, the system can be operated to illuminate a plurality of locations of a sample concurrently by a single excitation frequency, which can be generated, e.g., by shifting the central frequency of a laser beam by a radiofrequency. The detected fluorescence radiation can be used to analyze the fluorescence content of the sample, e.g., a cell / particle.

The invention discloses a time domain regulation and control metasurface scattering characteristic simulation method, device and product, relates to the technical field of electromagnetic simulation, and is used for accurately simulating the nonlinear real response of a time domain regulation and control metasurface under a time-varying feed signal. The method comprises the following steps: S1, constructing an electromagnetic simulation model for a time domain regulation and control metasurface and a feed network; s2, integrating a diode dynamic simulation model in the electromagnetic simulation model, wherein the diode dynamic simulation model is a diode simulation model supporting a self-defined impedance function or impedance changing along with voltage / current; and S3, performing scattering characteristic simulation on the electromagnetic simulation model. Simulation of different types of active devices is supported, and key functions such as wave absorbing performance and frequency regulation and control characteristics of the metasurface can be verified through static or dynamic simulation; the limitation that a traditional simulation technology is only suitable for a single excitation source is broken through, and a reliable technical means is provided for performance evaluation of the metasurface in multi-scene application.

This invention discloses an environmental noise-adaptive multi-spectral stress wave-acoustic fingerprint damage detection method and system, belonging to the field of non-destructive testing technology. The method constructs a passive-active hybrid excitation, using environmental noise as the passive source combined with an active signal, and adaptively weights this to form an enhanced excitation; it simultaneously acquires signals from 20-150kHz across multiple frequency bands and filters out interference; it constructs a three-dimensional acoustic fingerprint map including a benchmark and calibration; and it achieves defect identification and quantification through acoustic impedance tensor inversion, difference algorithms, and a Bayesian framework. The system includes acquisition, acoustic fingerprint construction, intelligent analysis, and monitoring and early warning modules, which collaboratively complete the entire detection process. This invention solves the limitations of single excitation, environmental interference, and the challenges of detecting complex structures, improving detection sensitivity, accuracy, and environmental adaptability. It is applicable to damage detection of metal and composite material components and has significant engineering value.

The present application relates to the technical field of ferromagnetic material nondestructive testing, more particularly, to a ferromagnetic part magnetic anisotropy detection device based on MBN method and a use method thereof.The detection device comprises a detection part, a signal generator and a signal processing part.The detection part comprises a single excitation coil and multiple receiving coils, wherein the receiving coils are adjusted in position by a movable arm assembly.The present application uses the combination of a single excitation coil and multiple receiving coils, can cover a larger detection area, is suitable for rapid measurement of large parts to be measured, and improves the detection efficiency.Moreover, the movable arm assembly ensures the adhesion of the receiving coils to the surface of the part to be measured, is suitable for different forms of parts to be measured, improves the versatility, and solves the poor versatility of the existing magnetic Barkhausen noise detection equipment.

The invention discloses a use method of an electro-optical double-excitation temperature sensor. The use method comprises a single excitation mode; wherein the single excitation mode is an EL mode or a PL mode; wherein the EL mode is an electroluminescence mode, and the PL mode is a photoluminescence mode; in the PL mode, the fluorescence intensity ratio of two characteristic emission peaks is obtained through a PL spectrum, and the temperature can be obtained according to a pre-calibrated curve; the EL mode specifically comprises the steps that the fluorescence intensity ratio of two characteristic emission peaks is obtained through an EL spectrum, and the temperature can be obtained according to a pre-calibrated curve. Double excitation modes of an EL mode and a PL mode are integrated on the same device, the inherent limitation that an electrical sensor is prone to electromagnetic interference and needs contact measurement is solved, and the serious dependence of an optical sensor on an external light source is overcome.

The invention discloses an environmental noise adaptive multi-spectrum stress wave-voiceprint damage detection method and system, and relates to the technical field of nondestructive testing. According to the method, passive-active hybrid excitation is constructed, environmental noise is taken as a passive source and is combined with an active signal, and enhanced excitation is formed through adaptive weight adjustment; synchronously acquiring 20-150kHz signals in multiple frequency bands and filtering interference; constructing a three-dimensional voiceprint map containing reference and calibration; and defect identification and quantification are realized through acoustic impedance tensor inversion, a difference algorithm and a Bayesian framework. The system comprises an acquisition module, a voiceprint construction module, an intelligent analysis module and a monitoring and early warning module which cooperatively complete whole-process detection. The problems of single excitation limitation, environmental interference and complex structure detection are solved, the detection sensitivity, accuracy and environmental adaptability are improved, and the method is suitable for damage detection of metal and composite material components and has important engineering value.

The invention relates to the technical field of vibration and noise analysis, in particular to a method and device for quantifying an NVH coupling degree index in a multi-source coupling scenario, and the method comprises the steps: collecting vibration and noise signals of at least one excitation source and a target point; identifying a transfer function from the at least one excitation source to the target point based on the vibration and noise signals; calculating a coupling coefficient of at least one excitation source according to the transfer function; constructing a coupling index system based on the coupling coefficient; and according to a quantification result of the coupling index system, determining a coupling effect of which the influence on the NVH performance of the product meets a preset condition and a related excitation source. Therefore, the problems that due to the fact that related calculation mostly depends on a single excitation source to conduct testing and analysis, the superimposed effect generated by the multi-source coupling effect cannot be fully considered, the large deviation exists between the testing result and the actual NVH performance of the product, and the overall NVH performance of the complex product under the real working condition is difficult to accurately evaluate are solved.

The application discloses a kind of based on homologous laser's spectral acoustic wave heterostructure signal insulator detection method, it belongs to insulator detection technical field, it solves the problem that existing insulator detection method cannot detect the defect inside and outside insulator simultaneously.The present application uses the same laser pulse single excitation and synchronously collects spectrum and acoustic wave signal, ensures the homology of signal, lays the physical foundation for synchronous detection of internal and external defects.By introducing equivalent dielectric response parameters and equivalent structure density parameters, the two types of features are physically modulated, which specifically represent the surface composition and internal structure state. After standardization and attention weighting fusion, the integrated representation of insulator comprehensive state is realized, and the rapid and non-contact identification of insulator defects is realized, which is especially suitable for online detection of power equipment.

The invention discloses a multimode fiber dynamic disturbance imaging reconstruction method based on a parallel neural network, and the method comprises the following steps: employing an LED as an illumination light source, and constructing a single-excitation wide-view-field multimode fiber (MMF) imaging system; under the condition that the disturbance range is 0-200 mm, image data of the output end of the multimode optical fiber are collected. By designing a parallel neural network structure, the network can perform efficient feature extraction and accurate image reconstruction on an optical fiber transmission image under dynamic disturbance, and particularly realizes high-fidelity image restoration under a small sample condition. The parallel neural network comprises a plurality of parallel sub-networks, each sub-network specially learns image mapping features under different disturbance conditions, and finally feature fusion is performed at an output end to obtain a stable image reconstruction result. According to the invention, the method has the remarkable advantages of high reconstruction precision, strong anti-disturbance capability and high training efficiency, and provides a novel and effective implementation way for high-fidelity imaging of the multimode optical fiber in a dynamic environment.

The application provides a BC component performance detection method and device, electronic equipment and a storage medium. The method comprises the following steps: through the electroluminescent imaging of the BC component by using three electric excitation modes of forward bias, reverse bias and alternating current modulation, a multi-dimensional electroluminescent signal is acquired, and then the performance detection and defect identification of the BC component are realized based on the signal. The application can make up for the defect that the signal information is not comprehensive under the conventional single excitation mode, and effectively improve the detection capability, the pertinence and the accuracy of performance detection.

The application discloses a single-excitation ultrasonic vibration cutting device with a three-branch structure. The cutting device comprises at least a fixed column and three column branch chains arranged in parallel with the tool column. Three flexible hinge branch chains are arranged between the fixed column and the three column branch chains. The connecting points of the three flexible hinge branch chains and the fixed column are distributed in the axial direction of the tool column. The ultrasonic vibration cutting device adopts a center column, three flexible hinge branch chains which are uniformly distributed in a circumferential direction at an angle of 120 degrees and have a height difference in a vertical direction, and can generate a three-dimensional tool tip vibration track in space by single input driving. The overall structure is compact and symmetrical, has excellent rigidity, and has no redundant transmission components, so that the problems of synchronous misadjustment and vibration coupling interference of multiple transducers can be avoided.

The application discloses a combined excitation wide-range infrasound piston sound generating device, and belongs to the technical field of acoustic measurement. The device comprises a first piston excitation system, a laser vibration measuring instrument, a second piston excitation system and a rotating support. The laser vibration measuring instrument is installed on the rotating support and is arranged between the first piston excitation system and the second piston excitation system. The rotating support is configured to adjust the measurement direction of the laser vibration measuring instrument to align the first piston excitation system or the second piston excitation system for displacement measurement. The first piston excitation system and the second piston excitation system with different driving characteristics are configured, and an overlap area or a connecting area is arranged between adjacent range sections, so that the continuous coverage of a wide sound pressure range is realized, and the range expansion bottleneck caused by the limited driving capacity and motion precision of a single excitation mode, the nonlinear effect of a single piston cavity and a cylinder plug sealing structure under extreme working conditions is overcome.

The invention discloses a composite control method for micro-ecological intervention of stone mountain soil by coupling an electric field and a magnetic field, and relates to the technical field of ecological restoration. Aiming at structural heterogeneous characteristics such as interlayer fracture, low porosity and large specific resistance of the stone mountain soil, the method combines micro-area structure identification and conductive characteristic self-adaptive detection, and the micro-ecological intervention of the stone mountain soil is realized. An electromagnetic intervention adaptability factor model is constructed, and accurate recognition and classified layout of intervention blind areas are achieved. Through blanket-type, net-type and hybrid electromagnetic device layout strategies, in cooperation with dynamic adjustment of excitation frequency, power and layout spacing, enhanced intervention of a high-resistance risk area is realized. Micro-ecological activation indexes including microbial activity, rhizosphere growth rate and available nutrient release rate are collected, intervention response rate is calculated, intervention effect is evaluated in real time, and a multi-stage adjustment strategy is triggered. According to the method, the spatial uniformity and accuracy of intervention are promoted and improved, the defects of intervention blind areas and single excitation parameters are overcome, and the activity and recovery capability of the micro-ecosystem are enhanced.

The present invention relates to the technical field of fluorescence analysis, and in particular to a tissue imaging method and system. The method comprises: a fluorescence excitation unit irradiates a target tissue with a single excitation light to form a light spot on the target tissue, wherein the target tissue comprises a tumor tissue and a non-tumor tissue; a signal collection unit collects a fluorescence signal having a waveband of 1100 nm to 1700 nm and filtered by a filter set, and sends same to a computer processing unit, wherein the fluorescence signal is autofluorescence generated after the target tissue is irradiated with the light spot; and the computer processing unit generates a first fluorescence image on the basis of the received fluorescence signal, and obtains, on the basis of the signal intensity of a fluorescence signal at each pixel point position on the first fluorescence image, a second fluorescence image indicating a tumor tissue region and a non-tumor tissue region. The beneficial effects of the present invention are that the signals are not easily interfered by other factors, and the generated images have high signal-to-noise ratio, and have strong specificity and accuracy.

The application discloses a high-precision cross-hole geological radar detection method, comprising the following steps: acquiring radar single-hole self-sending and self-receiving data of a single excitation source of two detection holes respectively, and acquiring radar double-hole transmission data of the two detection holes; generating an initial geological model by using the radar single-hole self-sending and self-receiving data; converting the radar double-hole transmission data into radar single-hole reflection wave data by virtual source mapping; carrying out forward modeling on the radar double-hole transmission data based on the initial geological model to obtain a forward wave field; carrying out wave field reverse continuation on the radar single-hole reflection wave data based on the initial geological model to obtain a reverse-time wave field; imaging the forward wave field and the reverse-time wave field at the same time to obtain imaging results, and then superimposing the imaging results of the excitation sources at different depths of the same detection hole to obtain wave field migration imaging. Compared with the prior art, the method improves the imaging precision.

The invention discloses a multi-shell rodlike up-conversion nano material as well as a preparation method and application thereof, and belongs to the technical field of nano materials. The multi-shell rodlike up-conversion nano material is NaGdF4: xYb / yTm (at) NaGdF4: zYb (at) NaGdF4: mYb / nNd (at) NaGdF4, wherein x is equal to 45 to 49 percent, y is equal to 1 to 5 percent, z is equal to 10 to 30 percent, m is equal to 5 to 15 percent, and n is equal to 40 to 60 percent. The invention further discloses a preparation method and application of the multi-shell rodlike up-conversion nano material. The sensitizing agent and the activating agent are spatially isolated through a multi-shell structure, and the surfaces of the sensitizing agent and the activating agent are subjected to graft modification, so that the up-conversion luminescent material has excellent up-conversion luminescent property, water solubility and biocompatibility; the problems of single excitation wavelength, easy fluorescence quenching and poor biocompatibility of a conversion nano material can be solved, and the application prospect is wide.

The invention provides a force-induced luminescence test platform with switchable friction-stretching double excitation modes, which is used for solving the problems of single excitation mode, transient discontinuous excitation process, difficulty in quantitative regulation and control of mechanical excitation parameters, easiness in shielding of light signal acquisition, interference of ambient light and the like in the existing force-induced luminescence test. According to the platform, continuous friction excitation between a sample and a transparent loading component is realized through a rotary friction excitation device, a normal load applying and monitoring device is used for applying normal load to the surface of the sample and monitoring the normal load in real time, and a tensile excitation device is used for applying controllable tensile strain to a mechanoluminescent film; the optical isolation device is used for shielding ambient light interference, and the mechanoluminescence signal acquisition and analysis device is used for carrying out acquisition and data analysis on luminescence signals. According to the invention, independent regulation and switchable testing of two mechanoluminescence modes of friction excitation and tensile excitation are realized, and the method is suitable for performance characterization of the mechanoluminescence film under different excitation mechanisms.

The application provides a sensor analog signal acquisition method, device and medium, comprising: providing an excitation current with M different phases to a Hall sensor through a constant current excitation source; the Hall sensor generates a Hall voltage signal under the action of a to-be-measured magnetic field and the excitation current; a signal conditioning circuit generates a reference voltage signal with the same frequency as the excitation current according to phase information of the excitation current; the signal conditioning circuit filters the Hall voltage signal to obtain a filtered Hall voltage signal; the filtered Hall voltage signal is superimposed with the reference voltage signal to obtain a composite signal, the composite signal is amplified by an amplifier to obtain an amplified composite signal; a multi-channel AD sampling module converts the amplified composite signal into a digital signal, and the amplitude value of the Hall voltage signal is obtained through calculation. Through the combination of multi-phase excitation current and orthogonal four-way signal processing, the signal quality improvement that cannot be achieved by the traditional single excitation mode is realized.