52 results about "Phase deviation" patented technology

The invention discloses a crystal oscillator taming system based on Kalman filtering and adaptive PID, and relates to the technical field of time-frequency equipment. Comprising a crystal oscillator time frequency module used for generating a local time frequency signal, a reference module used for receiving an external reference time frequency signal, an error measurement module used for measuring the phase deviation between the local time frequency signal and the reference time frequency signal, and a Kalman filtering estimation module used for performing Kalman filtering estimation based on the phase deviation. The Kalman filtering module is used for outputting phase deviation estimation and covariance estimation and adaptively adjusting PID parameters according to the phase deviation estimation, the position deviation estimation and the covariance estimation; the control feedback module is used for superposing the voltage-controlled voltage adjustment quantity to the crystal oscillator time frequency module to adjust the output frequency of the crystal oscillator; according to the method, the crystal oscillator taming parameters are dynamically adjusted through Kalman filtering in combination with self-adaptive PID, high-precision and robust taming of the crystal oscillator is achieved, and the long-term frequency stability and the time synchronization precision of the crystal oscillator are improved.

The application discloses a kind of calibration method and device for rotary variation soft decoding, calibration method includes: according to N times oversampling frequency respectively sampling rotary variation feedback sine and cosine feedback signal envelope surface and obtaining positive, cosine oversampling signal;Positive, cosine oversampling signal is handled to obtain the zero position offset of rotary variation positive, cosine envelope signal;Positive, cosine oversampling signal is handled to obtain the amplitude of rotary variation positive, cosine envelope surface;Positive, cosine oversampling signal is handled to obtain the phase deviation of rotary variation positive, cosine envelope surface;Through the amplitude, zero position offset, phase deviation obtained by calculation, the envelope surface of rotary variation positive, cosine is compensated, and the signal after compensation is sent into phase-locked loop to obtain the angle and rotational speed information of rotary variation.The application obtains accurate amplitude, zero position offset, phase difference in turn, and then carries out error compensation, finally obtains corrected positive, cosine signal, effectively guarantees the efficiency of motor.

The invention discloses a three-dimensional sonar phase self-correction method, and relates to the technical field of underwater acoustic engineering and array signal process.The method comprises the steps that a three-dimensional sonar image is generated through sonar original multi-channel signals, a plurality of strong display point targets which can be separated from the three-dimensional sonar image are extracted, and the signal-to-noise ratio of the strong display point targets is higher than a threshold value; sound path distance difference phase compensation is carried out on echo signals of each strong display point target, a channel common phase deviation is estimated by using a compensated residual complex signal, then an image entropy and a target peak value are set as convergence criteria, the criteria are deeply combined with an iterative reweighting mechanism, step-by-step optimization is carried out to obtain the phase deviation estimation precision, and the estimation precision of the channel common phase deviation is improved. And finally, obtaining an optimal inherent phase deviation, and carrying out global phase correction on the multi-channel echo signal by using the optimal inherent phase deviation. According to the invention, real-time online self-correction can be realized, the problem of imaging blur caused by phase inconsistency between channels is effectively compensated, and the contrast ratio of three-dimensional sonar imaging and the target visualization quality are remarkably improved.

The invention relates to the field of phased radars, and discloses an active phased array radar calibration method, which is used for improving the accuracy of actually measured phase data. Comprising the following steps: calculating theoretical excitation phases of radiation units according to an antenna array physical geometric structure and a target beam directional angle; enabling the antenna to sequentially excite the radiation units and collect coupling signals in a single-channel mode, and performing analysis to obtain an actually measured amplitude, a phase and a phase deviation; synthesizing the theoretical excitation phase and the phase deviation to generate an actual emission phase, and constructing a phase compensation lookup table; and after compensation by using the lookup table, measuring the actual directional diagram, and if not, performing fine adjustment. The calibration precision and reliability are improved, and the high-precision detection requirement of the active phased array radar can be met.

The invention relates to a cable fault identification method based on a frequency domain reflection method, and belongs to the technical field of detecting faults in a cable by adopting a pulse reflection method in electrical variable measurement. The method comprises the following steps: setting interval time for increasing sine wave signal frequency to divide moments; calculating an initial frequency f0, and transmitting a sine wave signal with the frequency f0 and the phase of 0 degree into the cable; and then calculating the phase offset at each moment, taking four times of the sine wave signal frequency as the lower limit frequency of the frequency domain reflection method at the moment when the phase offset is equal to 180 degrees for the first time, and further carrying out cable fault identification. According to the method, the lower limit frequency of the frequency domain reflection method is accurately set according to the actual characteristics of the to-be-detected cable, so that omission of cable fault key characteristics is avoided, and the identification accuracy is greatly improved.

The application provides a 2*2 beam splitter based on an error compensation structure, an interference unit, an imaging system and a method, the 2*2 beam splitter comprising: a first coupler, a second coupler, a first phase shifter and a second phase shifter; wherein the first phase shifter is connected on an optical path between the first coupler and the second coupler, and the second phase shifter is connected at an input port of the first coupler; the first phase shifter is configured to compensate for a phase deviation of the first coupler caused by a process error by adjusting a phase value of the first phase shifter; and the second phase shifter is configured to compensate for a phase deviation of the second coupler caused by a process error by adjusting a phase value of the second phase shifter. The application solves the problem that a traditional multi-mode interference coupler causes a misalignment of a light splitting ratio due to a process error, and further causes a decline in imaging resolution.

The embodiment of the present disclosure provides a delay-locked loop and a memory, the delay-locked loop comprising: a preprocessing module configured to receive an initial clock signal, preprocess the initial clock signal, output a first clock signal and a second clock signal; a first adjustable delay line configured to receive the first clock signal, adjust and transmit the first clock signal, and output a first target clock signal; a second adjustable delay line configured to receive the second clock signal, adjust and transmit the second clock signal, and output a second synchronization clock signal; and a first adjustment module configured to adjust the phase of the second synchronization clock signal based on the first target clock signal, and output a second target clock signal. In this way, the first adjustment module can correct the phase difference between the first synchronization clock signal and the second target clock signal, and improve the phase deviation between the target clock signals.

This invention relates to the field of optical detection technology, specifically a multifocal parallel phase extraction and alignment system based on a spatial light modulator, comprising: a wavefront modulation module, a parallel detection module, an information extraction module, a parameter calculation module, and a correction and execution module. The wavefront modulation module loads a phase modulation pattern through a spatial light modulator, generating a complex wavefront containing multiple diffraction orders via the objective lens, forming multiple spatially separated detection focal spots on the sample surface. The parallel detection module receives the reflected light signals from each focal spot in parallel through an array detector. The information extraction module analyzes the signals and extracts the phase offset of each focal spot, constructing a mapping set between position and phase offset. The parameter calculation module calculates the tilt angle and field curvature distribution parameters based on this set. The correction and execution module generates a comprehensive correction signal to drive the objective lens or sample stage to perform multidimensional attitude adjustments. This system achieves multifocal parallel detection and synchronous parameter calculation, improving alignment efficiency and accuracy.

A high-resolution image transmission system based on optical communication specifically relates to the technical field of image transmission, and comprises a mode multiplexing transmission module configured to modulate a high-resolution image signal into a plurality of orthogonal transmission actual modes, an interference parameter acquisition module configured to acquire actual interference parameters of the actual modes, and a mode multiplexing transmission module configured to transmit the actual interference parameters to the mode multiplexing transmission module. The actual multiplexing efficiency calculation module is configured to calculate actual mode multiplexing efficiency by taking actual interference parameters as a deducting part of interference loss, and the detail transmission capability evaluation module is configured to calculate actual spatial frequency response bandwidth in combination with detail transmission capability influence, and evaluate the actual mode multiplexing efficiency according to the actual spatial frequency response bandwidth. And the dynamic phase adjustment module is configured to calculate a phase modulation gradient adjustment amount and drive the phase modulator to correct a phase deviation of an actual mode in real time until an image transmission balance condition is met. The purpose of stable, undistorted and detail-complete transmission of the high-resolution image is achieved.

The invention discloses a direct-current frequency stabilization control method for a laser gyroscope. The method comprises the following steps: realizing high-precision phase extraction and closed-loop control through a 80kHz and 5kHz interruption collaborative sampling mechanism; after the frequency stabilization instruction is triggered, the system collects an alternating current light intensity signal in real time and calculates a product accumulated value to extract phase information; when a direct current modulation period is met and 80kHz interruption reaches 16 times, assigning an accumulated value as a direct current modulation phase, performing zero clearing, and then dynamically assigning a modulation parameter through 5kHz interruption counting; after the phase is subjected to normalization processing, phase deviation is corrected by combining a PID (Proportion Integration Differentiation) controller, a regulating variable is generated and superposed with a direct-current modulation value to form a final frequency-stabilized driving voltage, and the final frequency-stabilized driving voltage is output to a hardware circuit through digital-to-analog conversion; the voltage is fed back to direct-current light intensity and enters sampling circulation again after being processed by a circuit, so that continuous closed-loop control is formed; according to the scheme, the frequency stabilization precision and the dynamic response speed are effectively improved, the anti-interference capability is enhanced, stable and reliable output of the laser gyroscope is ensured, and the method is suitable for high-precision frequency stabilization scenes.

The present invention relates to a phase control loop (1) comprising a phase detection unit (2) for detecting a phase of a reference signal (100) and for outputting a measurement signal φ meas , a phase deviation detection unit (3) for generating an error signal φ err from the measurement signal φ meas and a target signal φ tgt , a loop filter (4) for filtering the error signal φ err, a modulator unit (5) for modulating the filtered error signal and generating a tune signal (500), and an oscillator (6) for generating an output signal (300) from the tune signal (500), wherein a feedback signal (200) formed from an output signal (300) of the phase-locked loop (1) is supplied to the phase detection unit (2), and wherein the phase-locked loop (1) further comprises: a divider unit (8) configured to generate a modulator clock signal (800) from an oscillator clock signal (400) of the oscillator (6) and to supply the modulator clock signal (800) to the modulator unit (5), and a sampler unit (15) configured to detect an offset (900) between the reference signal (100) and the modulator clock signal (800) by the offset (900) in determining the error signal φ err to take precise account of.

A method for optimizing a source profile and wavefront profile to simulate a lithography process is disclosed. More particularly, a method for minimizing a phase offset between diffraction orders in a source profile to generate an optimized source profile and an optimized wavefront profile, using a cost function with a phase cost term is disclosed. The disclosed method may further include a diffraction overlap penalty term in the cost function.

The invention provides a half-carrier frequency offset estimation method and system in an OFDM (Orthogonal Frequency Division Multiplexing) system, and the half-carrier frequency offset estimation method comprises the steps of baseband signal acquisition, CP (Cyclic Prefix) phase calculation, ambiguity judgment, phase ambiguity transfer, CP frequency offset estimation, integer frequency offset estimation and final frequency offset estimation, converting the cross-correlation phase deviation value into a single-peak structure to obtain a phase deviation of the single-peak structure, then counting a risk coefficient of the phase deviation falling into a fuzzy region, if the risk coefficient is greater than a set value, performing phase fuzzy transfer, performing phase fuzzy transfer on a scene falling into the fuzzy region to obtain a defuzzification-processed phase deviation, and finally obtaining the defuzzification-processed phase deviation. The invention further provides a system for estimating the frequency offset of the half carrier in the OFDM system. According to the method, a fuzzy region can be converted into superposition of two determined regions, and the problem that CP frequency offset estimation is unstable near the half-carrier frequency offset is well solved.

The invention provides a current transformer data testing device and method for a power distribution network. The method comprises the following steps: determining phase deviation characteristics of fundamental wave phase measurement values during harmonic interference in a primary side current signal and a secondary side current signal; when the harmonic distortion value of the primary side current signal exceeds a harmonic distortion threshold value, correcting measurement values of fundamental wave phases in the primary side current signal and the secondary side current signal to obtain measurement correction coefficients of the fundamental wave phases in the primary side current signal and the secondary side current signal; performing filtering tracking on fundamental waves in the primary side current signal and the secondary side current signal to obtain phase tracking values of the primary side and the secondary side of the current transformer; and performing error evaluation on the fundamental wave phase difference between the primary side current signal and the secondary side current signal to obtain a phase error index of the current transformer. By adopting the scheme of the invention, the phase error of the current transformer can be evaluated under the current distortion condition caused by the nonlinear load of the intelligent power distribution network.

The present invention relates to a phase control loop (1) comprising a phase detection unit (2) for detecting a phase difference between a reference signal (100) and a feedback signal (200) and for outputting a measurement signal φ representing the phase difference. meas , a phase deviation detection unit (3) for generating an error signal φ err from the measurement signal φ meas and a target signal φ tgt , a loop filter (4) for filtering the error signal φ err, a modulator unit (5) for modulating the filtered error signal and generating a tune signal (500), and an oscillator (6) for generating an output signal (300) from the tune signal (500), wherein a feedback signal (200) formed from the output signal (300) of the phase-locked loop (1) is supplied to the phase detection unit (2), wherein the modulator unit (5) comprises a modulator (7) and a scrambler (9) downstream of the modulator (7), and wherein the modulator unit (5) comprises an impairment module (10) configured to determine signal impairment from metadata (600) of the scrambler (9) and from predefined calibration data (400), and configured to feed signal impairments (700) back to the modulator (7).

The utility model provides an optical waveguide element, an optical modulator and an optical transmitting device which can restrain phase deviation of differential modulation signals transmitted in electrodes. An optical waveguide element in which an optical waveguide including at least one Mach-Zehnder type optical waveguide is formed on a substrate, and in which two modulation electrodes for applying differential modulation signals are disposed for each of two branch waveguides constituting the Mach-Zehnder type optical waveguide. Each of the modulation electrodes is composed of a plurality of proximity electrodes disposed in a divided manner along the branch waveguide, a signal electrode for transmitting the modulation signal, and a bypass electrode for connecting the proximity electrodes and the signal electrode. At least one of the two modulation electrodes is provided with a capacity adjustment mechanism for adjusting the phase velocity of a modulation signal transmitted through the modulation electrode.

The invention belongs to the technical field of wireless communication, and particularly discloses a phase compensation method and system for restraining intermodulation and harmonic waves of a short wave transmitter and application, and the system comprises a phase compensation module, a digital pre-distortion model training and pre-distortion signal generation module, a digital up-conversion module and the like which are connected through a feedback loop. After time delay and amplitude alignment are carried out on feedback signals through the data preprocessing module, fundamental wave and harmonic wave phase deviation caused by factors such as radio frequency time delay and down-conversion is accurately estimated and compensated through the phase compensation module, and a group time delay compensation coefficient measured through the vector network analyzer is introduced to carry out further compensation on harmonic waves. According to the method, the digital pre-distortion model can more accurately represent the nonlinear characteristic of the power amplifier, so that an effective pre-distortion signal is generated, intermodulation distortion and multiple harmonic distortion output by the power amplifier are remarkably suppressed, the linearity and communication quality of a short wave transmitter are improved, and meanwhile, equipment miniaturization is facilitated.

The invention discloses a double-end traveling wave distance measurement method and device for coping with time synchronization loss and a storage medium, and the method comprises the steps: calibrating and storing the inherent phase offset of power frequency voltages at two ends of a line in advance when time synchronization is normal; when a fault occurs after the time synchronization signal is lost, through identifying a power frequency voltage zero crossing point before the fault and combining with the phase offset, or carrying out cross-correlation calculation on a power frequency waveform before the fault at one end and a waveform at the other end, realizing accurate alignment of recording data at the two ends on a time axis, so as to establish a relative synchronization time reference; then, accurately identifying the arrival time of the wave heads of the initial traveling waves at the two ends by using a wavelet transform modulus maximum method; and finally, based on the aligned time reference, calculating the time difference of the traveling wave arriving at the two ends, thereby realizing accurate fault positioning independent of a satellite time synchronization signal. The device and the storage medium are used for implementing the method. According to the method, the robustness and the usability of the power distribution network traveling wave fault positioning system under the time synchronization abnormal working condition are effectively improved.

The invention relates to the technical field of space optical communication, in particular to a space optical communication-oriented lithium niobate waveguide array adaptive phase shaping method, which specifically comprises the following steps of: extracting a space phase matrix set and packaging to form an original phase sequence; calculating a phase change rate matrix sequence, and performing reconstruction processing on an original phase sequence to obtain a slowly-changed phase sequence; establishing a space mapping relation with a waveguide channel; calculating a target compensation phase sequence of each waveguide channel to obtain a channel compensation phase sequence of the calibrated array; forming a shaping light field time sequence by combining the light field amplitude sequence of each channel; and constructing a slowly varying reference phase matrix, calculating a phase deviation matrix of each period and setting a convergence index, performing convergence judgment in combination with an allowable phase deviation threshold, and outputting the shaping light field passing the convergence judgment as a final shaping light field. According to the invention, the problem that the physical response speed of the array is mismatched with the disturbance change rate in a slow turbulence scene in the prior art is solved.

The invention relates to an analog signal frequency deviation calibration method, a video system and a readable storage medium. The method comprises the following steps: acquiring a phase deviation value; the phase deviation value is obtained based on comparison of the first signal and the second signal; the first signal is a received modulated signal, and the modulated signal is obtained by modulating target information to a carrier of a target frequency based on a preset initial phase by the transmitting end; the second signal is generated by the receiving end based on the initial phase and the target frequency; and adjusting the frequency of the second signal based on the phase deviation value and a preset frequency deviation coefficient to obtain a calibrated demodulation frequency, thereby solving the problem of high hardware complexity of frequency deviation calibration, dynamically analyzing the phase deviation in combination with a software algorithm to correct the frequency deviation, and significantly reducing the design complexity and the manufacturing cost of the hardware.

This invention discloses an adaptive differential evolution cooperative position estimation method for meteor radar phase calibration, comprising: acquiring meteor trail angle of arrival (AHA) data and meteor trail distance data; constructing a composite objective function based on the meteor trail AHA and distance data; using the composite objective function, employing adaptive differential evolution to search for multi-channel phase deviations, and iteratively performing virtual half-wavelength baseline inversion of meteor trail positions until the composite objective function converges to a global minimum, ultimately obtaining high-precision multi-channel phase calibration results. This method requires no external reference signal, is stable and usable in all weather conditions, continuously and automatically updates calibration parameters, is simple to implement and low in cost, and has higher receiving channel phase calibration accuracy than existing internal calibration methods.

The present application relates to the field of three-dimensional optical precision measurement, and discloses a three-dimensional profile measurement method for the inner cavity surface of a purple sand pot based on optical measurement. The method constructs a multi-band spectral light source system, projects a light beam to the inner cavity surface according to a preset sequence of incident angles, and synchronously collects multi-spectral interference fringe images and ambient light noise data. According to the correlation between image distortion and light noise, a surface phase shift atlas is generated, and the measurement area and the occluded area are divided based on phase continuity. Phase unwrapping and geometric calculation are performed on the complete area to generate an initial three-dimensional point cloud, the boundary information of the occluded area is fused to complete hole speculation and surface extension, and a preliminary three-dimensional profile model is constructed. The model is registered with a standard theoretical model to generate a surface profile deviation field and output a process analysis report. The present application realizes accurate identification of the occluded area of a complex inner cavity through phase topology analysis, and uses spatial analysis of the deviation field to enable the measurement result to directly guide production process improvement.

The application provides a multi-harmonic superposition control method and device for a synchrotron. The method comprises: obtaining a current cavity fundamental wave signal, a current cavity harmonic wave signal and a current beam signal; calculating a first phase difference between the current cavity fundamental wave signal and the current beam signal based on the current cavity fundamental wave signal and the current beam signal; performing phase compensation on the current cavity fundamental wave signal based on the first phase difference and a first preset phase difference to obtain a first fundamental wave signal; calculating a second phase difference between a harmonic wave signal corresponding to the current cavity fundamental wave signal and the current cavity harmonic wave signal based on the current cavity fundamental wave signal and the current cavity harmonic wave signal; performing phase compensation on the current cavity harmonic wave signal based on the second phase difference and a second preset phase difference to obtain a first harmonic wave signal; and synthesizing a radio frequency signal based on the first fundamental wave signal and the first harmonic wave signal. Through the application, the phase deviation of each harmonic of the radio frequency signal is reduced, and the phase of the radio frequency signal is accurately controlled.

The invention discloses a moving object imaging system and method based on Fourier single-pixel imaging, and relates to the technical field of optical imaging, and the method comprises the steps: controlling a digital micro-mirror device modulation module to sequentially load at least two geometric moment patterns and a series of four-step phase shift fringe patterns, irradiating a moving object, and obtaining a moving object image; corresponding light intensity signals and light intensity signal sequences are respectively collected through a light intensity collection module; calculating a real-time centroid of the moving object according to the light intensity signal, and determining a movement track based on the change of the centroid; compensating the light intensity signal sequence according to the motion track so as to eliminate phase deviation caused by motion; and inverse Fourier transform is carried out on the compensated light intensity signal sequence, and a motion-blurred-free image of the moving object is reconstructed. The method has the advantages that the motion influence is compensated in real time in the moving object imaging process, image blurring is avoided, and the real-time performance and the calculation efficiency are improved.

The invention provides a CMUT three-dimensional ultrasonic reconstruction method based on phase coherence, and the method comprises the steps: collecting a real-time vibration signal and pressure distribution data in a cavity of a device, analyzing the amplitude change trend of the vibration signal and the spatial non-uniformity of the pressure distribution data, and extracting the inclination of a side wall; constructing a geometric shape of the cavity according to the inclination angle of the side wall, determining a sound wave propagation path track according to the geometric shape in the cavity, determining an echo receiving time sequence through the sound wave propagation path track, and identifying path deviation according to the determined echo receiving time sequence; when the path deviation exceeds a preset deviation threshold value, analyzing a phase distribution rule of the original ultrasonic echo data, extracting a phase deviation compensation amount, and generating an adjusted echo sequence; and if the depth information precision meets a preset standard, inputting the depth information precision into the three-dimensional reconstruction grid for volume rendering to obtain a target three-dimensional ultrasonic image.

The invention relates to the technical field of optical detection, and discloses an optical element subsurface defect detection method and system, and the method comprises the steps: carrying out the full-region scanning of an optical element, and obtaining a backscattered light signal; performing light splitting and filtering on the backscattering light signal to obtain a deep polarization scattering light signal group; performing coherent light compensation enhancement on the deep polarization scattered light signal group to obtain an enhanced polarization scattered light signal group; performing optical signal characteristic parameter analysis on the enhanced polarization scattered light signal group, and performing multi-level fusion on a light intensity distribution characteristic quantity, a phase deviation characteristic quantity and a polarization state deflection degree characteristic quantity corresponding to the analyzed signal group to obtain a comprehensive deviation vector; performing comparative analysis on the comprehensive deviation vector and preset standard parameter data to determine defect abnormity positioning data; performing full-attribute standardization judgment on the optical element to obtain a subsurface defect detection result; according to the invention, the accuracy of subsurface defect detection of the optical element can be improved.

The invention provides a multi-GHz clock tree dynamic phase calibration system and a deviation suppression method, and relates to the technical field of high-speed electronic system clock synchronization. According to the multi-GHz clock tree dynamic phase calibration system based on standing wave integrity monitoring and the deviation suppression method, a phased array radar realizes accurate beam pointing through sub-picosecond clock synchronization of hundreds of array elements, and the compensation precision of the system for environmental interference in a radar cabin is greatly improved in a full temperature range of-40 DEG C to 65 DEG C; phase deviation caused by temperature is suppressed and reduced through dynamic phase calibration, and radar ranging errors are reduced; and cable vibration bending compensation is carried out, phase deviation caused by bending and vibration is compensated for aiming at cable bending and vibration scenes among array elements, the speed measurement precision is improved, and the high-precision distance measurement and speed measurement requirements are met.

There is provided a phase shifter circuit of an optical encoder. The phase shifter circuit receives a first signal, a second signal, a third signal and a fourth signal sequentially having a 90-degree phase shift, and includes a first cascaded resistor string, a second cascaded resistor string, a third cascaded resistor string and a fourth cascaded resistor string. The first, second, third and fourth cascaded resistor strings respectively delay the first, third, second and fourth signals by selecting a switch connected at a tap-out node of the first, second, third and fourth cascaded resistor strings to correct phase deviations between incremental signals and an index signal and / or between incremental signals.

This invention discloses a self-zeroing fluxgate current sensor, belonging to the field of current sensor technology, aiming to solve the problem of zero-point bias error caused by the asymmetry of amplitude or phase of the two excitation signals in existing fluxgate current sensors. It includes an excitation signal generation circuit, two excitation cores and coils, an adder, an adjustable bandpass filter, an amplitude adjustment branch, a phase adjustment branch, a zero-adjustment controller, and a signal conditioner. The amplitude adjustment branch extracts the amplitude matching error of the two excitation induction signals, the phase adjustment branch extracts the phase deviation of the two excitation induction signals, the adjustment controller calculates the gain adjustment value and the phase adjustment value, and the signal conditioner uses the gain adjustment value and the phase adjustment value to adjust the gain and phase of one of the excitation drive signals in a closed loop, making the two excitation drive signals equal in amplitude and opposite in phase, directly eliminating the amplitude error and phase error from the excitation source, realizing mutual cancellation of the fundamental wave and odd harmonics, and fundamentally suppressing zero-point bias.

The application discloses a method and equipment for extracting same-frequency aliasing signals in a shear atomic interferometer. The same-frequency aliasing interference signals to be fitted are regarded as simple harmonic signals, fitted effective contrast and fitted effective phase are obtained based on the simple harmonic signals, and the contrast prior value of the first atomic interference signal and the contrast prior value of the second atomic interference signal are obtained by inversion. The same-frequency aliasing interference signals to be solved are regarded as simple harmonic signals, the measured effective contrast and the measured effective phase are obtained based on the simple harmonic signals, the absolute value of the phase deviation of the first atomic interference signal to be solved and the second atomic interference signal to be solved is calculated, and the phase of the first atomic interference signal to be solved and the phase of the second atomic interference signal to be solved are calculated. The application can reconstruct the atomic interference signals from the same-frequency aliasing interference signals to be solved, realizes the restoration of the original signals, and realizes the accurate separation of the atomic interference signals.