134 results about "Frequency correction" patented technology

The invention discloses an optical remote sensing satellite high and low frequency relative radiation error correction method and system, and the method comprises the steps: S1, carrying out the systematic high frequency radiation error calibration of a remote sensing image, so as to eliminate stripe noise; s2, performing frequency domain decomposition on the image after high-frequency correction, and separating high and low frequency components; s3, calculating a global statistical moment of the low-frequency component as a correction reference; s4, calculating a local statistical moment of the low-frequency component column by column; s5, calculating an independent correction coefficient for each column according to the global and local statistical moments; s6, correcting the low-frequency component by using the correction coefficient; and S7, recombining the corrected low-frequency component with the original high-frequency component to generate a final image. The method is suitable for improving the quality of the remote sensing image with multiple composite radiation errors, high-frequency stripes and low-frequency brightness gradient can be effectively eliminated, original texture details of ground features are reserved to the maximum extent in the correction process, and the radiation fidelity is guaranteed.

The invention discloses a medium-frequency transformer insulation electrothermal aging evaluation method, a test device and a storage medium, and relates to the technical field of power transformers. The medium-frequency transformer insulation electric heating aging test device comprises a function signal generator, a high-voltage power amplifier, a protection and isolation unit, an electric-heat combined aging oven and a detection and monitoring unit. The electrothermal aging evaluation method comprises the following steps: acquiring an aged sample, testing the ultimate tensile strength and polymerization degree of the aged sample, introducing a frequency correction factor to correct an attenuation constant under a power frequency condition, establishing tensile strength attenuation equations under different frequencies, and evaluating the tensile strength of the aged sample. And respectively fitting the maximum value of the accumulated loss rate and the change rate of the accumulated loss rate under different frequencies to obtain a polymerization degree accumulated loss rate improvement formula, and carrying out aging characteristic analysis on the insulation of the intermediate-frequency transformer according to the actual working condition of the insulation of the intermediate-frequency transformer. According to the technical scheme, the blank of medium-frequency transformer insulation electrothermal aging research is filled.

The invention provides an anti-noise interference frequency parameter estimation method for high-precision optical coherence ranging, which comprises the following steps: acquiring a spectral interference signal of an optical low-coherence interference system and a reference light spectral signal output only by a reference arm, and converting the spectral interference signal into interference signals with wave number space arranged at equal intervals, carrying out spectral density amplitude normalization to obtain a standard interference signal so as to eliminate interference of light source spectrum fluctuation and non-uniform sampling on frequency estimation; hanning window modulation is applied to a standard interference signal, spectrum leakage is suppressed, spectrum analysis is performed on the modulated signal, a peak value and an adjacent secondary peak value of a spectrum main lobe are extracted, a frequency correction amount is calculated based on a peak value and secondary peak value amplitude ratio relation derived by a Hanning window spectrum mode function, and an accurate frequency of the interference signal is obtained; and calculating the displacement of the object to be measured according to the product of the accurate frequency and the spectral resolution of the optical low-coherence interference system in combination with the refractive index of the light in the measurement medium.

The invention relates to a satellite-ground radar reflectivity factor consistency evaluation and deviation traceability method and system, and belongs to the field of radar calibration evaluation, and the method comprises the steps: generating reference ground radar scanning parameters according to geographical environment multi-source heterogeneous data; acquiring satellite-ground radar data according to the scanning parameters of the reference ground-based radar when the satellite-borne radar passes the scene, and performing preprocessing and space-time matching to obtain a satellite-ground radar data pair; based on the target correction information of each height level region, performing sectional frequency correction on the spaceborne radar data to obtain an optimal satellite-ground radar data pair; and carrying out reflectivity factor consistency evaluation on the optimal satellite-ground radar data pair, taking an obtained evaluation result as a tracing reference, and carrying out deviation tracing calibration estimation on the service ground-based radar in combination with a satellite-ground radar reflectivity factor consistency evaluation result of the service ground-based radar. According to the method, the technical problems of precise evaluation of systematic deviation of satellite-ground radar data and unified evaluation and calibration of multi-service satellite-ground radars are solved.

A method for adjusting audio frequency includes steps of: obtaining initial frequency and temporary data storage of audio data input to a buffering unit; performing a first adjustment procedure on initial frequency to obtain a first variation of temporary data storage corresponding to a first change of initial frequency; calculating a first frequency correction amount according to first variation and a first period of first adjustment procedure; adjusting initial frequency into first frequency according to first frequency correction amount; inputting first frequency into buffering unit; performing a second adjustment procedure on first frequency to obtain a second variation of temporary data storage corresponding to a second change of first frequency; calculating a second frequency correction amount according to second variation and a second period of second adjustment procedure, which first period is less than second period; and adjusting first frequency into target frequency according to second frequency correction amount.

The invention discloses a time-frequency offset tracking method in a Tiantong satellite monitoring low-orbit satellite system, which belongs to the field of satellite communication, and comprises the following steps: acquiring satellite orbit information, satellite ephemeris information and positioning information of a low-orbit satellite, and resolving current Doppler frequency offset information; performing frequency pre-compensation according to the Doppler frequency offset information, and performing compensation by using the frequency offset captured by the FCCH; the satellite-borne terminal receiver carries out carrier frequency estimation by using a downlink channel, so that the carrier residual frequency difference of a received signal is estimated, and frequency correction is carried out; starting downlink timing tracking; uplink frequency offset compensation is started, so that the frequency of a signal from the low-orbit satellite to the Tiantong satellite is the expected carrier frequency of the Tiantong satellite; and carrying out transmission timing correction by adopting the spaceborne terminal timing drift rate, and carrying out uplink timing adjustment. According to the method, normal access and stable data transmission of the satellite-borne terminal can be realized.

A contactless electric power transmission system includes an electric power reception device and a control device. The electric power reception device receives AC electric power transmitted in a contactless manner from an electric power transmission device. The control device includes: a coil temperature detection portion that acquires temperatures of a secondary side coil, a magnetic member, and a secondary side capacitor of the electric power reception device; a magnetic member temperature detection portion; and a capacitor temperature detection portion. The control device includes a request frequency correction portion that corrects a request frequency of electric power transmission by the electric power transmission device based on the temperatures of the secondary side coil, the magnetic member, and the secondary side capacitor.

The invention discloses a county isolated network frequency correction control system supported by multiple resources cooperatively, which relates to the technical field of intelligent power grids and comprises a control center, and the control center is connected with a resource acquisition module, a cooperative processing module, a support analysis module and an intelligent correction module. Constructing a power grid comprehensive layout map, collecting power grid composite data, extracting an isolated grid regional frequency to construct a regional frequency dynamic graph, and performing frequency tense judgment on the regional frequency dynamic graph to obtain an isolated grid frequency judgment result; performing frequency measurement updating on the power grid comprehensive layout diagram to obtain an abnormal power grid marking diagram; performing anomaly grading on the abnormal power grid mark graph to obtain a node frequency deviation degree, and performing frequency supplementary rescue on the isolated network block according to the node frequency deviation degree to obtain a dynamic correction scheme; the frequency control capability is improved and the power system stability is enhanced.

The application discloses a frequency divider-free phase-locked loop and a reference double-delay frequency locking method thereof. The sub-sampling phase-locked loop architecture receives an output of an oscillator and feeds back the output to a reference double-delay frequency locking loop. The output end of a reference double-delay generator in the reference double-delay frequency locking loop is electrically connected with the input end of a sample-and-hold circuit, and the output end of the sample-and-hold circuit is electrically connected with the input end of an automatic phase error state detector. The sample-and-hold circuit simultaneously receives an oscillator output feedback signal of the sub-sampling phase-locked loop architecture. The output end of the automatic phase error state detector is electrically connected with the input end of an adaptive output frequency corrector, and the output end of the adaptive output frequency corrector is electrically connected with the sub-sampling phase-locked loop architecture. Unequal double-reference clock delays are introduced, the sample-and-hold circuit is combined to realize the detection of the output frequency, a new frequency locking loop working at a reference frequency is used to replace a traditional frequency locking loop, and the problem of high power consumption caused by a high-frequency frequency divider is solved.

The invention relates to a system comprising a first and second generator (E1, E2) delivering excitation signals to a first and second resonator (R1, R2) generating chaotic signals. The resonators (R1, R2) are structurally different and coupled to one another. Advantageously, this system makes it possible to synchronize the chaotic signals and comprises: ● a dissipation correction module acting on the modulation frequencies fm1, fm2 of the excitation signals, ● a non-linearity correction module acting on the amplitudes of the excitation signals, ● a resonant frequency correction module acting on the carrier frequencies fc1, fc2 of the excitation signals, ● an amplitude correction module acting on the amplitudes of the chaotic signals. The invention also relates to a synchronization method based on this system.

The utility model relates to a unit used for radio frequency calibration, comprising an outer side support frame, two opposite ends of the outer side support frame are respectively plugged with a sealing end plate and an auxiliary end plate, and one side of the sealing end plate and one side of the auxiliary end plate are respectively provided with a sealing groove used for plugging and supporting. A plurality of inserting rods for positioning and supporting are arranged on the sealing end plate, and a plurality of connecting pins for connecting and supporting are uniformly arranged on the outer side of the outer side supporting frame. According to the radio frequency calibration unit, limiting support is provided for assembly and use of components in the frequency calibration unit based on support of the outer side support frames, the connection strength of the device during installation and use is improved through arrangement of the insertion rods, and the same outer side support frame can be adjusted to be square or square for use according to actual use requirements; and the device can be vertically or horizontally mounted and used, so that the device can be used in various forms and various connection states, and the use convenience of the device is improved.

The invention discloses a Hankel singular value decomposition-based magnetic resonance spectrum water peak modeling and post-processing method. The method comprises the following steps of: acquiring original multi-channel FID (Flame Ionization Detector) signals by a PRESS sequence; combining multi-channel signals, and performing frequency correction and eddy current correction; reconstructing and deducting a time domain water peak model, and executing exponential filtering processing; and performing baseline correction by adopting an asymmetric least square method to obtain a final spectrogram. Accurate modeling and removal of residual water peaks are realized by utilizing Hankel structure matrix singular value decomposition, adaptive baseline correction is performed by introducing an asymmetric least square method, interference of the residual water peaks is effectively reduced, the baseline smoothness of a spectrogram and the distinguishability of metabolic peaks are improved, and the method can be used for realizing accurate modeling and removal of the residual water peaks under the condition of not depending on additional modulation of a collection end or increasing of sequence complexity. The time domain signals are subjected to structured matrix decomposition to realize accurate modeling and removal of residual water peaks, the signal-to-noise ratio and metabolic peak resolution of the spectrogram are remarkably improved, the operation is stable, the robustness is high, and the obtained final MRS spectrogram can meet clinical requirements.

The invention relates to the technical field of server hardware control, and discloses a server hardware acceleration control system based on noise temperature coupling. The system comprises a multi-source noise collector, a temperature control accelerator, a noise temperature coupling analyzer and an acceleration decision master control unit. The multi-source noise collector is deployed on the surface of the acceleration unit and an internal key node, and captures an electromagnetic radiation noise spectrum and a mechanical vibration noise waveform in real time; the temperature control accelerator integrates a thermoelectric refrigeration array and a voltage frequency modulation module, receives the temperature sensing data flow, and generates a pulse type refrigeration instruction and clock frequency correction according to a dynamic strategy; the coupling analyzer decomposes the multi-modal noise signal, extracts an energy feature vector, and constructs a coupling coefficient matrix; and after receiving the matrix operation, the acceleration decision-making unit outputs a frequency scaling factor and a voltage offset to the temperature control accelerator, feeds back a failure frequency band marking result update coefficient, and combines noise and temperature coupling characteristics to realize dynamic balance of hardware acceleration performance and stability.

A method, system, and apparatus for a wireless receiver with intermediate frequency (IF) detection and local oscillator (LO) frequency correction is disclosed. According to one aspect, the wireless receiver is configured to include a LO configured to generate a local oscillator signal, the LO not being phase-locked. The wireless receiver includes a mixer configured to mix the LO signal with an amplitude shift keying (ASK) modulated signal to produce an intermediate frequency (IF) signal. The wireless receiver also includes a tuning circuit configured to estimate a frequency of the IF signal and tune the LO according to the estimated intermediate frequency, and tune the LO to compensate for IF frequency drift. The IF frequency estimation is based on a correlation of the signal in a plurality of frequency bins of a fast Fourier transform (FFT) of the IF signal.

The embodiment of the invention provides a synchronous phasor calculation method and system suitable for power grid transient fault analysis, and the method comprises the steps: collecting three-phase voltage and current signals at a fixed sampling interval, and constructing a data window with the length of N; a synchronous phasor is calculated based on a data window by adopting a cyclic DFT algorithm, and frequency correction is performed through a three-point frequency correction method; monitoring the abrupt change rate of the zero-sequence component in real time to identify the power grid operation state; when the operating state of the power grid is identified as a fault, performing fault phasor calculation by using a short data window by adopting a least square method based on an attenuation direct-current component model; and outputting a phasor result according to the power grid operation state. According to the technical scheme provided by the invention, the precision, the real-time performance and the robustness of phasor analysis in the transient fault process of the power grid can be improved.

The invention belongs to the technical field of distributed optical fiber sensing, and relates to an anti-distortion distributed optical fiber sensing method and system based on array phase spectrum demodulation, an ultra-weak reflection optical fiber Bragg grating array is used as a sensing optical fiber, a series of reflection peaks with the signal-to-noise ratio higher than that of RBS are generated, a reflection peak sequence is formed, and the beat frequency signal spectrum amplitude is increased. A discrete beat frequency signal with frequency domain distortion output by an OFDR sensing system is converted to a frequency domain through Fourier transform of a symmetric window function to obtain a corresponding discrete frequency spectrum, and characteristic parameters such as amplitude and phase of a reflection peak sequence in the frequency spectrum are tracked and extracted; and then frequency correction factors of the reflection peak sequence in all measurement periods are calculated by using an amplitude interpolation correction method to obtain a corrected accurate array phase spectrum, and phase difference and strain calculation are performed to realize multi-point quasi-distributed strain demodulation for suppressing frequency domain distortion such as Doppler frequency shift and the like. The frequency resolution limitation caused by the fence effect is broken, and the fidelity of the frequency domain distortion signal is recovered.

The invention provides an anti-unmanned aerial vehicle passive positioning method and system based on an external radiation source of a low-orbit satellite, and relates to the technical field of satellite positioning, and the method comprises the steps: employing the external radiation source of the low-orbit satellite as an irradiation signal source under the same time reference, and carrying out the irradiation of each ground receiving station, performing synchronous sampling on the complex sampling sequences corresponding to the reference receiving channel and the monitoring receiving channel, performing frequency correction and phase correction on the complex sampling sequences of the reference receiving channel and the monitoring receiving channel, and performing feature comparison on the complex sampling sequence of the reference receiving channel and a historical robust complex sampling sequence; and obtaining a feature comparison result, and based on the feature comparison result, updating a background reference value used for delay-frequency shift image background normalization and a background reference value allowable fluctuation interval, so that the effectiveness of multi-station observation consistency constraint can be improved, a more stable unmanned aerial vehicle position solution can be obtained, and thus anti-unmanned aerial vehicle passive positioning is realized.

The application provides a multi-motor pulse speed regulation control method and system, relates to the technical field of motor control, and acquires a target setting quantity and a target motor identifier, converts a target driving parameter according to a parameter set associated with the target motor identifier, the parameter set including an elastic modulus value and a stress relaxation coefficient of a peristaltic pump hose; real-time driving parameters are maintained for multiple pulse output channels respectively and are refreshed at a synchronous time; operation state feedback values of the peristaltic pump channel and the stirring motor channel are collected, a water hammer effect frequency component and an impeller passing frequency component are extracted, and correction is carried out based on the elastic parameters; it is judged whether a cross-channel resonance judgment condition is met, when the condition is met, a frequency correction amount and a phase correction amount are determined and are applied to at least one pulse output channel, so that the resonance risk is reduced and the system operation is stabilized.

Methods are described for synchronization in a non-terrestrial network. A satellite communication terminal may receive, over its satellite link, synchronization transmissions containing one or more synchronization signals. The synchronization transmission may be received with an unknown frequency offset and / or at very low signal-to-noise ratio, and / or the synchronization signals may be formatted in any of several predefined patterns, making detection and / or demodulation of the one or more synchronization signals a challenge. According to the methods described herein, detection of at least one synchronization signal may include about simultaneous correlation in 3 dimensions of multiple instances of the at least one synchronization signal. The correlation result may then be used for generating a fine-resolution frequency correction, once applied demodulation of one or more additional synchronization signals and extraction of network access information becomes possible.

This invention discloses a distributed adaptive frequency regulation method for isolated microgrids. The method is executed collaboratively by each distributed power generation unit. First, it monitors the system frequency and its own status in real time to determine frequency regulation needs, and dynamically activates or suspends its frequency regulation participation status through an event-triggered mechanism. The activated frequency regulation participating units calculate dynamic weighting coefficients based on the frequency deviation direction, combined with equipment type, power generation stability, reserve power utilization rate, and operating costs. Then, it exchanges information with neighboring units through a sparse communication network, runs an adaptive distributed consensus algorithm based on the dynamic weights, and generates frequency recovery and power allocation control signals. After integration, a reference frequency correction is obtained, and the traditional droop control is corrected in real time to adjust the unit output. This invention can achieve dynamic adaptive allocation of frequency regulation priorities, reduce communication burden, quickly restore system frequency, and improve the stability and economy of isolated microgrid operation.

The invention belongs to the technical field of signal differential conversion, and particularly relates to a high-speed single-ended to differential circuit with low positive and negative electrode errors. According to the single-ended to differential circuit provided by the invention, the single-ended to differential module carries out first-stage gain and second-stage gain on the input signal to generate two amplified signals with opposite phases, transconductance amplification is carried out in combination with the original signal to output the differential pair, a symmetrical signal path is constructed from the source, and signal mismatch and positive and negative errors are remarkably reduced. The DC level correction module enables DC working points at all levels to be consistent through comparison and feedback control, thereby effectively suppressing DC offset and temperature drift, and improving the conversion precision and stability. And the high-frequency correction equalization module extracts and compensates high-frequency components of the differential signals, so that the outputs are consistent in amplitude and strictly opposite in phase in a full frequency band, and the working bandwidth is effectively expanded. Compared with the prior art, the structure realizes high-speed and low-error reliable signal conversion while ensuring low power consumption.

The utility model provides a resonator and an acoustic wave device. The resonator includes: a substrate; the reflection structure, the first electrode layer, the piezoelectric layer and the second electrode layer are sequentially arranged on the substrate in a stacked mode, and the overlapped area of the reflection structure, the first electrode layer, the piezoelectric layer and the second electrode layer in the direction perpendicular to the substrate is a resonance area; the first functional layer is arranged between the piezoelectric layer and the second electrode layer, and at least part of the first functional layer is arranged in a non-resonance area; the second functional layer is arranged on the surface, which is not covered by the second electrode layer, of the piezoelectric layer; wherein the size of at least part of the first functional layer and / or at least part of the second functional layer in the direction perpendicular to the substrate is reduced in the direction away from the resonance area; and the frequency repairing layer is arranged on the surfaces, far away from the substrate, of the second electrode layer and the second functional layer.

The invention relates to the technical field of electric signal processing, in particular to an impedance model construction method and system of a new energy flexible low-frequency sending-out system. The method comprises the following steps: recording real-time timing sequences of voltage and current of a converter bridge arm under different working conditions; extracting a time interval between the voltage peak value and the current peak value, a voltage waveform slope change rate and a current waveform oscillation period, and labeling corresponding working condition labels to form a bridge arm dynamic feature library; and identifying the voltage waveform and the current waveform of the converter bridge arm, and synchronously recording the line resistance and the line reactance between the converter stations. According to the invention, through integration of the bridge arm dynamic features, construction of the bridge arm dynamic feature library and high-frequency correction cooperation, adaptive optimization of bridge arm parameters and construction of the impedance model of high and low frequency bands are realized, so that the matching efficiency of the impedance model is improved.

This invention proposes an adaptive variable frequency air volume control method for fans, belonging to the field of air volume control for variable air volume air conditioning systems. The method predicts the required air volume based on the actual operating conditions of each area and detects the actual air volume to calculate the total required air volume. Combined with the fan characteristic curve, the initial frequency of the fan is obtained. Then, by using the difference between the total required air volume and the total measured air volume and the opening of the terminal damper, the initial frequency of the fan is corrected according to the fan frequency correction rule, thereby achieving adaptive control of the fan frequency. This achieves energy-saving effects while taking into account the air volume demand of the most unfavorable terminal.

The invention discloses a transformer winding high-frequency resonance monitoring method, device and equipment and a medium. The method comprises the steps that signals collected in real time are real-time voltage and current time domain signals output by the secondary side of the mutual inductor; performing high-frequency correction on the real-time voltage and current time domain signals through a pre-calibrated amplitude correction coefficient and a phase delay correction parameter to obtain corrected voltage and current signals; carrying out improved short-time Fourier transform on the corrected voltage and current signals, and respectively extracting a voltage high-frequency component frequency spectrum and a current high-frequency component frequency spectrum; determining a local resonant frequency library of a transformer winding based on a transformer distributed parameter equivalent model established by a finite element method; matching the voltage high-frequency component frequency spectrum and the current high-frequency component frequency spectrum with resonant frequencies in a local resonant frequency library to determine a frequency matching degree; and determining a risk degree evaluation result of the transformer winding state according to the frequency matching degree.

The invention relates to the technical field of imaging enhancement, and discloses a night vision device imaging system and method based on imaging enhancement, and the method comprises the steps: firstly, selecting a connected highlight region in an image, carrying out the time dimension averaging of the brightness, and forming a brightness time sequence; performing frequency analysis on the brightness time sequence, and determining the pulse width modulation frequency of external illumination and the electronic shutter frequency of the night vision device; calculating a normalized third-order spectrum based on the two and the sum frequency thereof, extracting an imaginary part of the normalized third-order spectrum as a control quantity, and solving a fluorescent screen decay time constant through a phase relation; generating a three-frequency correction signal by using the control quantity, the attenuation time constant and the three-frequency parameter, and correcting the brightness time sequence; determining a brightness shaping parameter according to the control quantity, and performing brightness shaping on the correction result to obtain an enhanced sequence; and carrying out the above steps on the image blocks, carrying out weighted fusion according to the control quantity of each block, and outputting an enhanced image with uniform brightness, clear details and excellent anti-flicker performance.

The application relates to the technical field of magnetic field measurement, in particular to a double-frequency resonance locking system of an NMOR atomic magnetometer based on FPGA, which comprises an FPGA, a laser modulation driving unit and a signal acquisition and processing unit, a homologous synchronous reference signal source, a first demodulation branch and a second demodulation branch are arranged in the FPGA, signals corresponding to a single Larmor frequency and double Larmor frequency are synchronously demodulated respectively to obtain corresponding in-phase signals and quadrature signals. The FPGA determines corresponding weight coefficients according to the output signals of the two demodulation branches, fuses corresponding frequency correction amounts and obtains a frequency control amount to adjust the laser modulation frequency. The system is also provided with a frequency sweeping and peak searching logic and a host computer parameter configuration module. The application is used for realizing that there is always a feedback signal with sufficient signal-to-noise ratio in the whole space range, so that the measurement blind area of the single-frequency NMOR magnetometer is eliminated.

An electronic device is disclosed. The electronic device can: store, in a memory, a calibration value for calibrating a frequency generated by a clock generation circuit; attempt a connection to a base station; if the connection between the electronic device and the base station fails, determine a difference value between a first calibration value applied for frequency calibration and a previous calibration value applied before the first calibration value; determine whether the difference value is greater than or equal to the threshold value; and, if it is determined that the difference value is greater than or equal to the threshold value, perform frequency calibration on the basis of the previous calibration value so that a first frequency generated by the clock generation circuit is calibrated.

The embodiment of the invention provides a distributed dual-inverter carrier synchronization method and system based on common-mode voltage feedback, and belongs to the technical field of inverter control. According to the scheme, a total common-mode voltage signal of the distributed double inverters is obtained; performing signal preprocessing on the total common-mode voltage signal to obtain a preprocessed signal containing carrier phase difference information; performing proportional processing according to the pre-processing signal to obtain a frequency correction amount; frequency compensation is carried out on a target inverter according to the frequency correction amount, a carrier frequency control signal is obtained, and the target inverter is a sub-inverter in the distributed double inverters; and carrying out carrier synchronization control on the target inverter according to the carrier frequency control signal. According to the invention, carrier synchronization of the distributed double inverters can be realized without communication, and common-mode voltage is eliminated.

The application discloses an elevator operation data monitoring method and system, and belongs to the technical field of control systems, and comprises the following steps: obtaining an elevator first sensing position, thereby analyzing a radar positioning determination result; if the radar positioning determination result is unqualified, S2 is executed, otherwise the operation is continuously executed; S2, a radar carrier frequency is adjusted in real time, and a radar carrier frequency adjustment determination result is analyzed; if the radar carrier frequency adjustment determination result is unqualified, S3 is executed, otherwise the operation is continuously executed; S3, a radar carrier frequency correction coefficient set is obtained; S4, an optimized and adjusted radar sensing real-time spatial position is obtained; S5, an optimized adjustment determination result is analyzed; if the optimized adjustment determination result is qualified, the adjustment is completed, otherwise self-shielding avoidance adjustment is carried out. The application solves the problem that the elevator radar positioning is not accurate due to external influence recognition real-time change, and realizes accurate positioning of the radar system.