406 results about "Large dynamic range" patented technology

A burst-mode optical receiver for an optical line terminal (OLT) of a passive optical network (PON) comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to a burst-mode optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a burst-mode TIA with a large dynamic range and provides for fast switching. The burst-mode optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention discloses an optical fiber distributed sound wave sensing device based on double chirped pulses, which relates to the technical field of distributed optical fiber sensing and comprises a laser module (1), a chirped pulse modulation module (2), a sensing optical fiber module (3) and a Rayleigh scattering signal separation and receiving module (4), laser generated by the laser module passes through the chirped pulse modulation module to obtain double chirped pulse signals with different frequency bands, excites Rayleigh scattering signals in the sensing optical fiber module and inputs the Rayleigh scattering signals to the Rayleigh scattering signal separation and receiving module for signal separation and demodulation. The sensing optical fiber is inquired through double chirped pulses of different frequency bands, two Rayleigh scattering signals are excited to achieve a wide range and high sensitivity, the advantages of the two signals are combined through an adaptive filtering algorithm, the dynamic range of distributed sound wave detection is improved by one order of magnitude, and the detection accuracy is improved. The acquisition of large chirp bandwidth Rayleigh scattering signals is realized at a low sampling rate, and a distributed sound wave sensing technology with a large dynamic range is realized.

The invention relates to a design method of a star magnitude large dynamic range spectrum modulation system. The design method comprises the following steps: S1, adopting a cylindrical collimation beam expanding system, a star magnitude large dynamic range light splitting system and a DMD device; the star magnitude large dynamic range light splitting system is composed of a large dynamic light splitting optical system and an energy modulation optical system. The star isometric large dynamic light splitting optical system is composed of a steering reflecting mirror, a grating and an imaging reflecting mirror. The energy modulation optical system is composed of a steering mirror, a grating and a plane mirror. S2, selecting a DMD device and a grating; and S3, carrying out optimization design on the cylindrical collimation beam expanding system and the star magnitude large dynamic range beam splitting system. According to the invention, the cylindrical collimation and beam expanding system is adopted to replace a physical slit and a collimating mirror in the Czerny-Turner type plane diffraction grating optical structure, so that the imaging quality of the large-dynamic-range spectrum modulation optical system can be improved; and the problem of contradiction between the slit and the imaging quality in the initial structure can be solved.

The present disclosure relates to an active graded magnetic compensation system and method for an unshielded SERF magnetometer. The system comprises: a detection laser, a half-wave plate, a magnetic field compensation coil, a magnetic field modulation coil, a non-magnetic heating assembly, an alkali-metal atomic vapor cell, a polarizing beam splitter prism, a balanced photodetector, a graded feedback control module, a pump laser, a quarter-wave plate, a focusing lens and a photodetector. By means of the present disclosure, a graded compensation system is used to realize high-precision compensation for a magnetic field within a large dynamic range in a geomagnetic environment, thereby ensuring that an instrument carries out high-sensitivity magnetic field measurement under geomagnetic conditions.

The invention provides a low-frequency signal receiving device, belongs to the technical field of low-frequency communication, and designs a large-gain isolation direct amplification and variable center frequency band-pass filter to replace a traditional frequency conversion receiver, so that the scale of a circuit is effectively reduced to 1 / 3 of that of the original frequency conversion receiver; front isolation amplification is designed, the two-stage automatic gain circuit has high-sensitivity 16 dB to 126 dB large dynamic range receiving capacity, isolation segmentation amplification is designed, a frequency-adjustable narrow-band filter is inserted in the middle of cascade connection of the two-stage automatic gain circuit in a penetrating mode to prevent circuit self-excitation, and direct large gain amplification stability is improved. The bandwidth of the two-stage frequency-adjustable narrow-band filter ranges from 400 Hz to 1200 Hz, the gradient coefficient is smaller than 4, and out-of-band interference can be effectively restrained. A 10dB-80dB amplifier is designed in front of a frequency-adjustable narrow-band filter, so that the noise of an LTC1068-25 switched capacitor filter is overcome, and the received noise of the whole machine is smaller than 5nV / Hz1 / 2. According to the invention, light, stable and miniaturized underwater receiving capability is realized, and the antenna is suitable for application scenarios with high requirements on power consumption and space, such as UUV and the like.

The invention provides an early warning method in construction temporary warehouse electric power material supply, which comprises the following steps: establishing a three-dimensional electromagnetic field distribution model based on actual environment influence according to a relative position relationship between a highway construction temporary warehouse and a high-voltage transmission line, and obtaining electromagnetic environment theoretical distribution of each warehouse; in the temporary warehouse, electromagnetic sensors are arranged according to materials, highly sensitive to electromagnetic interference, of electronic components, and large-dynamic-range electromagnetic sensors are arranged according to materials, high in electromagnetic field induction, of metal materials; monitoring data collected by various electromagnetic sensors of the warehouse are transmitted back to a power grid dispatching center in real time through the low-power-consumption wide-area Internet of Things and are associated with warehouse material structure parameters, and a database is constructed; historical data of a power grid load and an electromagnetic environment are mined, an association rule of an electromagnetic interference characteristic and a power transmission line operation condition is extracted, and a collaborative prediction model of a multi-warehouse electromagnetic safety situation is established.

An optical frequency domain reflectometer with environmental disturbance resistance and large strain measurement capability belongs to the field of distributed optical fiber sensing and comprises an opposite sweep frequency light frequency modulation continuous wave signal generation module, a light splitting device, a modulation device, a circulator, a polarization controller, an optical coupling device, a photoelectric conversion module and a data acquisition and processing module. An optical signal generated by an opposite sweep frequency light frequency modulation continuous wave signal generation module is divided into probe light and local oscillation light through a light splitting device, the probe light is modulated through a modulation device and sent to an optical fiber through a circulator, and a Rayleigh back scattering light signal generated by the optical fiber and the local oscillation light interfere in an optical coupling device to obtain interference light; the photoelectric conversion module mixes beat frequency signals of interference light, and the data acquisition and processing module analyzes and processes the beat frequency signals. According to the invention, the position information of the Rayleigh backscattering point is marked by using the modulated probe light, the Rayleigh scattering signal at the corresponding position is restored, crosstalk between channels is inhibited, and high-precision measurement in a large dynamic range and resistant to environmental disturbance is realized.

The invention provides a lighting device and a dark field detection system and method, and the method comprises the steps: carrying out the pre-detection of the distribution positions of bright defects and dark defects on the surface of a to-be-detected wafer based on a wide-view-field imaging device, and obtaining a defect distribution map of the to-be-detected wafer; classifying the brightness degree of each defect in the defect distribution map, and obtaining light source brightness level distribution corresponding to each position of the wafer to be detected; in the dark field detection device, a light source is provided for a to-be-detected area of a to-be-detected wafer based on linear illumination light, each to-be-detected area on the to-be-detected wafer is scanned, the intensity of a detection light signal is regulated and controlled according to the brightness level of the corresponding light source, and the adjusted detection light signal is collected so as to realize dark field detection. During dark field detection, the detection sensitivity consistency of different pixel positions is good, the light source intensity utilization rate is high, and the image acquisition dynamic range is large.

The invention provides a correlated double-sampling program-controlled gain amplifier for a high-energy particle detection pixel sensor and an implementation method, and solves the technical problem that a large dynamic range and high readout precision cannot be considered at the same time during existing high-energy particle detection. The circuit comprises a correlated double-sampling circuit, a signal polarity conversion circuit, an amplification feedback circuit and a configuration automatic judgment circuit. The correlated double sampling circuit is used for performing double sampling on the output voltage of the pixel signal to obtain twice sampling voltage; the configuration automatic judgment circuit is used for selecting configurations for switching according to the voltage difference between the two sampling voltages to obtain an output signal; and the amplification feedback circuit is used for performing fixed gain voltage amplification on the output signal to obtain an amplified voltage signal. The circuit can be widely applied to the technical field of integrated circuits.

An optical receiver comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to an optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a TIA with a large dynamic range and provides for fast switching. The optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention discloses a semi-aviation transient electromagnetic signal adaptive gain method and system, and relates to the technical field of geophysical exploration, and the method comprises the steps: obtaining a differential signal of a receiving coil, and carrying out the chopping self-stabilization zero amplification processing of the differential signal; the method comprises the following steps: dividing a total time window of a differential signal into a plurality of time channels under a set time reference, adjusting the length of each time channel according to a signal attenuation characteristic, calculating the time length and data point number of each time channel according to a sampling rate and the total time window, and calculating the time length and data point number of each time channel; the data points are distributed to an early time channel, a middle time channel and a late time channel, so that different gain multiples are switched, and adaptive gain amplification is carried out; and the differential signal subjected to adaptive gain amplification is transmitted to a receiver after being collected by an ADC (Analog to Digital Converter). By dynamically adjusting the gain coefficient in different time channels, the technical problems of large dynamic range of transient electromagnetic signals and low signal-to-noise ratio of weak signals are solved, and high-fidelity acquisition of full-time-domain signals is realized.

The invention relates to optical fiber channel security detection, in particular to an optical transport network equipment channel security detection system and method based on quantum measurement and an optical time domain quantum detection device, which are used for carrying out signal detection with high spatial resolution and large dynamic range based on quantum measurement and realizing high-precision sensing of multi-dimensional parameters of an optical fiber channel. The main control software is applied to realize equipment control, data processing and analysis based on an artificial intelligence algorithm and application layer communication; the optical transport network equipment performs information interaction with the application master control software through the management and control system and executes a corresponding security policy; the wave combination control module is used for carrying out beam combination on the optical signal output by the optical time domain quantum detection device and a service signal output by the optical transport network equipment, entering an optical fiber channel and controlling to switch a detection line; according to the technical scheme, the defects that high-spatial-resolution and large-dynamic-range signal detection is difficult to carry out, and accurate event type judgment and high-precision spatial discrimination cannot be carried out on tiny loss events can be overcome.

The invention discloses an image sonar gain adaptive control method based on an FPGA. The method comprises the following steps: an upper computer sends a control message carrying a manual gain parameter to a sonar signal processing board based on an Ethernet UDP protocol so as to execute manual gain control; a codeword gain and voltage gain cooperative control architecture is provided; pID closed-loop feedback control is carried out based on beam pattern characteristics, and when a manual gain value changing message issued by the Ethernet is received, the adaptive gain compensation value and the PID historical state are cleared, and the manual gain code is switched to an instruction specified value. According to the invention, conflict-free switching between a self-adaptive mode and a manual mode can be realized, and in addition, the quality of sonar images and the stability of gain regulation and control are improved while large dynamic range and high-precision adjustment of time-varying gain are realized.

The present application discloses a low-cost and high-performance radio-frequency amplifier, comprising an input stage circuit, a common-gate stage circuit, and an output load circuit. The input stage circuit implements conversion from a single-ended signal to a differential signal, implements input impedance matching, and converts an inputted radio-frequency voltage signal into a radio-frequency current signal. The input stage circuit comprises a first three-coil transformer, consisting of a primary coil, a secondary coil, and a third coil. The common-gate stage circuit transmits the radio-frequency current signal outputted by the input stage circuit to the output load circuit, increases the withstand voltage and equivalent output impedance of the circuit, and implements gain control in at least two modes. The output load circuit converts the radio-frequency current signal from the common-gate stage circuit into a radio-frequency voltage signal, implements conversion from a differential signal to a single-ended signal, and outputs an amplified radio-frequency voltage signal. The present application provides a radio-frequency amplifier having a small size, broadband matching, high linearity, a large dynamic range, and low design complexity.

An SIP module integrated direct wave amplifier comprises a power supply control module, an X-band down-conversion module and an L-band down-conversion module, the power supply control module provides attenuation control signals and a low-ripple power supply for the X-band down-conversion module and the L-band down-conversion module, the X-band down-conversion module performs primary frequency conversion on externally received radio frequency signals, and the L-band down-conversion module performs secondary frequency conversion on the externally received radio frequency signals. The L-band down-conversion module performs secondary frequency conversion on the radio frequency signal subjected to primary frequency conversion by the X-band down-conversion module, the two down-conversion modules are arranged to realize structure modularization and standardization by adopting a SiP modularization mode, and each module is independent in function, so that the structure is simple, the cost is low, and the cost is low. Meanwhile, the serial-parallel conversion chip control circuit is adopted to control the numerical control attenuator to meet the requirements for high gain and large dynamic range of the direct wave amplifier, the architecture and the number of control circuits are simplified, and the circuit is easy to build, easy to use, convenient to integrate and high in selection flexibility.

The invention discloses a high-resolution FPI spectrum demodulation method, and relates to the field of optical fiber sensing. Comprising the following steps: acquiring an FPI interference spectrum, and performing pretreatment, including spectrum standardization, wave number conversion and wave number domain interpolation, on the acquired spectrum; performing FFT (Fast Fourier Transform) on the interpolated spectrum to obtain an amplitude spectrum and a phase spectrum; roughly estimating the F-P cavity length through a corrected amplitude spectrum Buneman algorithm; and the F-P cavity length is accurately calculated in combination with the phase spectrum. The FPI sensor demodulated according to the method can realize real-time monitoring of various environmental parameters including vibration, pressure and temperature, and compared with other demodulation methods, the method provided by the invention has the characteristics of high resolution, small calculation amount and large dynamic range, and has stable performance under the condition of low signal-to-noise ratio.

The invention relates to the technical field of wafer detection, in particular to a wafer surface pollution defect detection method and device, and the method comprises the steps: carrying out the dark field shooting of a target wafer, obtaining a surface dark field scattering image of the wafer, traversing each pixel in the dark field image, forming an SNR estimation graph through the neighborhood setting and SNR estimation calculation, and carrying out the detection of the surface pollution defect of the wafer. Global threshold segmentation is carried out on the SNR estimation image through a double-threshold principle to obtain a low-threshold binary image and a high-threshold binary image, a connected region in the low-threshold binary image is traversed, if at least one pixel in the connected region is marked as a defect in the high-threshold binary image, all pixels in the connected region are marked as real defects, and if at least one pixel in the connected region is marked as a defect in the high-threshold binary image, all pixels in the connected region are marked as real defects. Otherwise, marking the defect as a pseudo defect. According to the invention, under the conditions of large dynamic range of background noise, small number of defect pixels, weak defect signals and the like, defects and defect contours can still be detected stably.

The invention relates to the field of spaceflight measurement and control, and discloses a large-scale constellation multiple access measurement and control spread spectrum signal de-spreading bit width quantization method. Signal samples are counted, a noise deterioration factor and a bit width quantification model are respectively established, the de-spreading bit width is accurately expanded, and the optimal balance of resources and performance is realized. The method solves the problem that the detection range of strong and weak signals is limited when a single receiver detects multi-satellite same-frequency signals at the same time, remarkably improves the system capacity, and has the characteristics of quantizability, large dynamic range and multi-constellation adaptation.

A high-crosstalk array waveguide grating structure capable of changing waveforms and improving demodulation resolution comprises an input optical waveguide, the output end of the input optical waveguide is connected with the input end of a coupling module, and the output end of the coupling module is sequentially connected with a first slab waveguide, an array waveguide and a second slab waveguide. The output end of the second slab waveguide is respectively connected with the input ends of the first output waveguide, the second output waveguide, the third output waveguide and the fourth output waveguide; according to the invention, the array waveguide grating structure connected with the coupling module at the input end is adopted, so that the output spectrum of the adjacent output channels has large bandwidth, the large dynamic range of the adjacent channels during FBG wavelength demodulation is ensured, an optical waveguide width value different from a design value is adopted, the top end waveform of the output spectrum is regulated and controlled, and the demodulation precision is improved. On the premise of ensuring that the dynamic range of adjacent output channels is not changed, the resolution of the demodulation wavelength is improved; the device has the advantages of simple structure, large bandwidth, high crosstalk and high wavelength demodulation resolution.

The present invention relates to a simple VHF frequency band channel transceiver, belonging to the technical field of very high frequency transceivers. It is composed of a device box and a circuit board. The device box is composed of a shell, a cover plate and a shielding cavity. The receiving / transmitting channel module installed on the circuit board contains a receiving circuit, a transmitting circuit and a power supply circuit; the receiving circuit is composed of a low-noise amplifier frequency selection, mixing, intermediate frequency amplification, intermediate frequency crystal filtering, automatic gain control, receiving demodulation and receiving frequency synthesis circuit; the transmitting circuit is composed of a transmitting frequency synthesis, a transmitting pre-stage drive amplifier, a transmitting post-stage drive amplifier and a power detection circuit; a plurality of shielding cavities are milled in the shell and the cover plate, and the shielding cavities are respectively equipped with individual module circuits of the receiving circuit and the transmitting circuit, and the shell and the cover plate are sealed and shielded for the circuit board. The integrated design of the transceiver channel machine and the radio frequency carrier 4FSK digital signal modulation are realized. The receiving intermediate frequency, image frequency, intermodulation and spurious response indicators are excellent, the multi-channel operation has no crosstalk, the analog sensitivity is high, the volume is small, the noise is small, the harmonic spurious suppression is high, and the receiving dynamic range is large.

The invention discloses a large dynamic range Hartmann sensor out-of-focus measurement method and device, and belongs to the technical field of wavefront detection, and the method calculates the out-of-focus amount by measuring the change of the distance from a sub-light spot to the center of a light spot array, thereby achieving the out-of-focus measurement of an ultra-large dynamic range. According to the method, under the condition that the defocusing amount is too large and the sub-light spots cross the sub-apertures, the defocusing amount is estimated by measuring the distance variation of the sub-light spots to the center of the light spot array. According to the method, the defocusing amount is calculated by analyzing the position change of the sub light spots and calculating the distance difference between the sub light spots and the center of the target surface, so that the limitation of the traditional Hartmann measurement method on the dynamic range is overcome. According to the method, the light spot distance is used as a measurement basis, and the out-of-focus range capable of being detected by the Hartmann sensor is remarkably expanded. The estimation mode based on the light spot distance is suitable for the situation that sub-light spots cross sub-apertures, and an efficient and reliable defocus measurement scheme is provided for a large optical system.

The invention relates to a low-power-consumption clock delay method and system in the technical field of integrated circuits, and the method comprises the following steps: carrying out the phase alignment of a counting clock signal and a to-be-delayed clock signal based on the counting clock signal, and generating a first phase clock alignment signal and a second phase clock alignment signal; extracting rising edge information and falling edge information of the first phase clock alignment signal to obtain a pulse signal; splitting the clock rising edge information and the clock falling edge information to obtain a first pulse filtering signal and a second pulse filtering signal; performing coarse delay on the first pulse filtering signal and the second pulse filtering signal in sequence, and performing signal synthesis processing after coarse delay to obtain a coarse delay clock signal; and performing fine delay on the coarse delay clock signal based on the digital time converter to obtain a fine delay clock signal, thereby solving the problem that the existing delay technology cannot simultaneously realize high delay precision and large dynamic range under the condition of low power consumption.

The invention belongs to the field of integrated circuits, and particularly relates to a large-dynamic-range logarithmic amplifier with an extensible dynamic range. Comprising cascaded N-stage amplitude limiting amplification units, M-stage resistance attenuators, N + M + 1-stage amplitude limiting detectors and an adder, the output end of each stage of amplitude limiting amplification unit is connected with the input end of a first-stage wave detector, the output end of each stage of resistance attenuator is connected with the input end of a first-stage amplitude limiting wave detector, and the input end of the first-stage amplitude limiting amplification unit and the input end of the first-stage resistance attenuator are connected with the input end of the first-stage amplitude limiting wave detector; the output end of the (N + M + 1)-stage amplitude limiting detector is connected with the input end of the adder; n > = 2, M > = 2; according to the logarithmic amplifier, the problems that when an external circuit is built around the logarithmic amplifier to enlarge the input dynamic range, the temperature characteristic of separated components is poor, and the circuit is unstable are solved, and the monolithic design of the logarithmic amplifier with the large dynamic range is achieved.

A burst-mode optical receiver for an optical line terminal (OLT) of a passive optical network (PON) comprises a variable optical attenuator (VOA), a photodiode (PD) which may be a pin-PD or an APD, a transimpedance amplifier (TIA), and a feedback / control circuit for adjusting a bias voltage of the VOA in response to a burst-mode optical input signal level, to provide an attenuated optical output signal to the PD having a narrower dynamic range. Providing signal level adjustment in the optical domain mitigates the requirement for a burst-mode TIA with a large dynamic range and provides for fast switching. The burst-mode optical receiver may comprise a waveguide configuration, wherein a first electro-absorption modulator (EAM) is operable as the VOA and a second EAM is operable as the photodiode. A monolithically integrated electro-photonic circuit comprising the VOA, PD, TIA and feedback / control circuit may be provided using InP-based semiconductor materials.

The invention provides an echo wall mode microcavity time-varying signal sensing method and system. The echo wall mode microcavity time-varying signal sensing method comprises the steps of S1, building an echo wall mode microcavity time-varying signal sensing experiment platform based on a double-optical-comb spectrum technology; s2, starting a dual-light frequency comb; s3, sensing a time-varying signal through coupling of a coupling device and the echo wall mode microcavity; s4, performing Fourier transform on the output of the reference path and the signal path within one sampling time, and extracting a time-varying signal by using a plurality of modes of the microcavity; and S5, repeatedly executing the step S4 until the measurement is finished. Time-varying parameter sensing is achieved through multiple modes of the microcavity, high sensitivity is achieved, meanwhile, high precision and a large dynamic range are achieved, and application of microcavity sensing is further expanded.

The invention relates to a low noise amplifier, a radio frequency front end module and communication equipment, a power amplification unit is connected with a radio frequency output end and is connected with a radio frequency access end through an input unit, and a bypass unit is connected with the radio frequency output end and is connected with the radio frequency access end through the input unit. And the gain of the low-noise amplifier when the bypass unit is switched on is smaller than that when the bypass unit is switched off. By controlling the on-off of the bypass unit, the gain gear of the low-noise amplifier can be adjusted, the low-noise amplifier is suitable for the gain requirement of a large dynamic range, and the use convenience is improved.

The invention belongs to the field of acceleration measurement, and particularly discloses a multi-acceleration-sensor data fusion method and system, and the method comprises the steps: obtaining acceleration signals measured by each accelerometer when a preset acceleration signal is inputted into calibration equipment when an accelerometer assembly composed of N accelerometers is disposed on the calibration equipment, the measuring ranges of the N accelerometers are complementary to the noise level range; considering the inclination angle error of the rotary table, the installation angle error of each accelerometer and the non-orthogonal error of each accelerometer, the coordinate system of each accelerometer is converted to the same geographic coordinate system, and each accelerometer is calibrated by combining the acceleration signal measured by each accelerometer and the input preset acceleration signal. Obtaining calibration parameters of each accelerometer; the calibration parameters are used for compensating acceleration signals measured by the accelerometers. According to the invention, large-dynamic-range acceleration measurement is realized.

Multiple images that include a first image, a second image, and a third image are received. The multiple images are such that the second image is temporally between the first image and the third image. The first image, the second image, and the third image are combined to obtain a long-exposure image. High dynamic range processing is applied to the second image and the long-exposure image to obtain an output image with a larger dynamic range than a dynamic range of the second image. The high dynamic range processing uses the second image as a short-exposure image. An image based on the output image is transmitted, stored, or displayed.

The invention belongs to the technical field of seismic exploration, and particularly discloses a geophone and a measurement method thereof. The geophone comprises an oscillator unit, an upper cover plate and a measuring unit, wherein the upper cover plate and the measuring unit are arranged right above the oscillator unit in parallel; a first capacitor plate array is deposited on the lower surface of the upper cover plate through metal deposition, and a second capacitor plate array and a metal coil are deposited on the upper surface of an oscillator of the oscillator unit through metal deposition; the vibrator unit is arranged in the constant magnetic field, and the vibrator unit is electrically connected with the measuring unit; the oscillator unit is used for driving the second capacitance plate array to move relative to the first capacitance plate array when an oscillator moves due to external vibration so as to generate a capacitance change signal; driving the metal coil to move so as to generate an induced current signal; and the measurement unit is used for measuring the seismic signal of the target frequency band based on the capacitance change signal and the induced current signal. According to the invention, seismic signal measurement covering a large dynamic range and a large frequency range can be realized, and meanwhile, high-resolution seismic signal measurement is realized.

The invention relates to an infrared image gray super-resolution display method, and belongs to the technical field of infrared imaging. According to the method, the infrared image is divided into the base layer and the detail layer through the filter, gray dynamic compression mapping and large dynamic range gray subdivision enhancement are performed on the base layer, adaptive detail enhancement is performed on the image of the detail layer, and gray fusion super-resolution display is performed on the image processed by the base layer and the detail layer, so that the imaging quality of the infrared image is improved.