1431 results about "Digital conversion" patented technology

The invention discloses an electric power data acquisition method and equipment based on a logarithmic amplifier and a medium, and relates to the technical field of electric power monitoring signal processing, and the method comprises the steps: collecting an original analog current signal on an electric power circuit and an analog temperature signal of an environment where the logarithmic amplifier is located, and generating a mixed observation vector; based on the mixed observation vector, calculating an estimated value of a temperature characteristic correction parameter in real time through a pre-stored temperature-parameter mapping relation, and performing logarithmic compression on the original current digital signal sequence by using the estimated value of the temperature characteristic correction parameter to obtain a compressed voltage signal subjected to temperature compensation; and performing high-speed analog-to-digital conversion on the compressed voltage signal subjected to temperature compensation to obtain a discrete digital signal sequence, and storing the discrete digital signal sequence into a priority cache region. According to the invention, the data volume is effectively compressed by using the correlation between the signals, and the transmission bandwidth and the storage demand are reduced.

The invention relates to the technical field of data analysis and control, in particular to a hydraulic climbing frame safety control method based on digital monitoring, which comprises the following steps: acquiring monitoring data in real time through a sensor group arranged on a hydraulic climbing frame, preprocessing and analog-to-digital conversion are carried out on the monitoring data, then the data are formed and sent to a remote monitoring center through a wireless transmission technology, and the preprocessed monitoring data are input into a pre-stored structure safety evaluation model and a hydraulic system performance evaluation model so as to be analyzed in real time; analyzing the hydraulic climbing frame, judging a safety characterization state of the hydraulic climbing frame according to an analysis result, determining a safety risk type based on an abnormal state of the hydraulic climbing frame, sending early warning information through a user interaction platform when a risk is judged to exist, and executing a corresponding safety control instruction; automatic real-time monitoring, intelligent early warning and active control of the safety state of the hydraulic climbing frame are achieved, and construction safety and operation reliability are remarkably improved.

The invention discloses a hydraulic power plant equipment full life cycle health management system and method based on the Internet of Things, and relates to the technical field of hydraulic power plant equipment management, and the method comprises the steps: collecting operation parameters through a sensor network disposed on various types of equipment of a hydraulic power plant, and forming a data sequence after time synchronization and analog-to-digital conversion; the data sequence is subjected to noise reduction processing at the edge computing node, whether an abnormal state exists or not is judged on the basis of the data analyzed and processed by the lightweight anomaly detection model, the data is graded and marked according to a judgment result, and only statistical characteristics of abnormal data or non-abnormal data marked as high priorities are uploaded to a cloud data center; and the cloud data center identifies the type of the equipment component according to the uploaded data, calls the corresponding physical degradation evolution model, dynamically calculates the degradation degree of each component in combination with the real-time operation state, determines the weight relationship of each degradation dimension according to the service stage of the equipment, and generates a comprehensive health index.

A high-linearity grid voltage bootstrap circuit relates to the technical field of analog-to-digital conversion and comprises a first charge pump boosting unit, a second charge pump boosting unit and a grid voltage bootstrap unit, working states of a sampling switch are divided into a sampling state and a holding state, an input voltage VIN is boosted to a VG through the grid voltage bootstrap unit in a sampling stage, and the sampling switch is switched on; and the holding stage sampling switch is cut off, and charges are injected to the upper polar plates of the capacitors C3 and C4 of the gate voltage bootstrap unit through the first charge pump boosting unit and the second charge pump boosting unit respectively. According to the invention, the problem that the actual gate-source voltage is reduced due to the grid parasitic capacitance of the sampling switch is solved, and the layout area occupation is greatly reduced while the bootstrap voltage is improved; the proportion of the capacitor C3 and the capacitor C4 can be flexibly set to obtain the required bootstrap voltage; and the problem that the on-resistance of the sampling switch is increased due to the reduction of the gate-source voltage can be solved, and the linearity of the sampling switch is improved.

The present application discloses a computing-in-memory circuit, chip and electronic device, wherein the computing-in-memory circuit comprises: a resistive random access memory array, a clamping circuit, a current mirror and an analog-to-digital conversion circuit; the clamping circuit is connected between a signal input terminal and the resistive random access memory array, configured to input clamping voltage signal to the N resistive random access memories selected of the resistive random access memory array, wherein N is an integer and N≥2; the current mirror is connected between the resistive random access memory array and the analog-to-digital conversion circuit, configured to output convergence current to the analog-to-digital conversion circuit based on the N-way currents output from the N resistive random access memories selected; the analog-to-digital conversion circuit configured to convert the convergence current to a digital signal.

The invention provides a BIM-based 3D building digital monitoring method and system, and belongs to the technical field of building engineering monitoring, and the method comprises the steps: carrying out the digital conversion and processing of a building design drawing of a target building, extracting the geometric and attribute information of the target building, and generating a standard BIM model; verifying and calibrating the basic multi-dimensional data and the standard BIM model when the target building is completed, and generating a reference BIM model; performing spatial registration and association mapping on the acquired multi-dimensional monitoring data and the reference BIM model to generate an association data set; comparing based on the associated data set to generate a comparison result; obtaining a potential risk type and a risk evolution trend of the target building through a risk prediction model based on a comparison result, historical monitoring data and a component static attribute in the reference BIM model; and generating a target monitoring strategy based on the potential risk type and the risk evolution trend. The building operation and maintenance efficiency is improved, and the service life of the building is prolonged.

The invention provides a portable fire blast risk dynamic identification and danger tracing method and terminal, and the method comprises the steps: collecting positioning data in real time through a GNSS positioning module; a high-speed analog-to-digital conversion chip ADC is used for carrying out high-frequency and synchronous processing on the gas concentration collected in real time; collecting field environment parameters in real time; performing dynamic threshold intelligent judgment to obtain a leakage judgment result, and executing a grading early warning mechanism; recording an inspection track in real time, and carrying out space gas concentration gradient analysis to obtain a gas concentration gradient; calculating a built-in space distance; judging the leakage direction according to the gas concentration gradient data, and intelligently tracing the leakage source according to the leakage judgment result; and uploading the security data to the cloud. According to the invention, the limitation of static and single-threshold alarm of an instrument is solved, and the technical problems of difficulty in spatial continuous sensing and automatic tracing positioning of gas leakage abnormity in a complex inspection environment with dynamic changes of multi-component combustible gas and environmental parameters are solved.

The invention relates to the technical field of Ethernet communication and digital information transmission, and discloses an Ethernet-based time synchronization acquisition method, device and equipment and a medium, and the method comprises the steps: obtaining initial network time based on a network time protocol and a precise time protocol; recovering the synchronous clock signal from the Ethernet physical layer signal and generating a trigger pulse signal aligned with a second boundary to generate second-level reference time; the trigger pulse signal and the synchronous clock signal are used for executing high-frequency counting accumulation to generate nanosecond-level fine time; performing frequency division processing on the synchronous clock signal based on the sampling rate configuration parameter to obtain a sampling driving clock; the analog-to-digital conversion unit is triggered at the effective jump edge of the sampling driving clock to sample and latch nanosecond-level fine time to generate a sampling timestamp, and the sampling timestamp is output in combination with sampling data. According to the method, time recovery, time refinement and sampling time locking are realized through a unified time base, so that sampling action and time counting are accurately aligned, and the data synchronization precision and consistency of distributed acquisition nodes are improved.

The invention relates to the technical field of earthquake and acoustic exploration, and discloses a signal acquisition and transmission method, device, equipment and medium based on a main control unit, and the method comprises the steps: generating a sampling clock signal and a time counting signal, driving an analog-to-digital conversion unit to obtain a digital acquisition signal, and reading equipment state parameters; after the timestamp is added, the digital signal is stored in the first cache unit, the state data after the timestamp is added is stored in the second cache unit, the data signal cache unit is written into a first FLASH partition after being full, and the state data cache unit is written into a second FLASH partition after being full. And after data is read from the FLASH, differential signals are output through the multi-wire parallel interface, the logic processing unit and the serialization unit. According to the invention, power consumption is reduced through unified power management and optimization of clock control and a dormancy mechanism, and transmission bandwidth is improved in combination with high-speed differential output, so that both low power consumption and high efficiency are realized.

The invention discloses a gesture recognition method and system based on an active acoustic sensing field, and the method comprises the steps: transmitting a frequency modulation continuous wave through a loudspeaker on head-mounted equipment, and receiving an echo signal reflected by the hand of a wearer through a microphone on the head-mounted equipment; performing frequency mixing, low-pass filtering and analog-to-digital conversion on the echo signal to obtain a digital baseband signal; performing range correction and noise reduction processing on the digital baseband signal to obtain a hand echo signal; inputting a hand echo signal into the multi-scale time sequence encoder, and capturing long time sequence dependence to obtain multi-scale spatial-temporal characteristics; performing trajectory tracking on the multi-scale spatial-temporal features by the hand key point regression branches to obtain hand key point features; inputting the hand key point features and the multi-scale spatial-temporal features into the gesture recognition branch to obtain a gesture recognition result; according to the method, multipath interference and spatial fuzziness in the acoustic sensing process can be overcome, and high-precision and fine-grained gesture recognition is realized.

The invention relates to the technical field of data processing, and discloses an integrated reconnaissance interference method and system based on a transmit-receive cancellation technology, and the method comprises the steps: receiving a mixed signal containing a target radar signal and a leakage interference signal through a receiving channel, and obtaining a first digital signal after down-conversion and analog-to-digital conversion, the leakage interference signal is a signal leaked from the transmitting channel to the receiving channel; acquiring a second digital signal corresponding to an interference signal generated in the transmitting channel, and transmitting the interference signal through an antenna after digital-to-analog conversion and up-conversion; taking the second digital signal as a reference signal, performing adaptive cancellation processing on the first digital signal through an adaptive filter to suppress a leakage interference signal component in the first digital signal, and generating a cancelled signal; wherein in the adaptive cancellation processing process, the digital processing unit adaptively updates the cancellation filtering weight of the adaptive filter according to the reference signal and the cancelled signal.

An on-line program control excitation power supply with quench protection for a high-temperature superconducting magnet comprises a single-chip microcomputer for receiving control data, outputting control voltage through digital-to-analog conversion (DAC) of the single-chip microcomputer, and magnetizing a magnet coil through current stepping; a sampling signal is output to the liquid crystal screen to display corresponding voltage and current values in real time after being processed by the single-chip microcomputer analog-to-digital conversion ADC; voltage signals at the two ends of the magnet coil are sampled and returned to the single-chip microcomputer to be processed, when high voltage occurs, it is judged that the voltage signals are abnormal voltage signals, quench protection is carried out, the single-chip microcomputer outputs control signals to cut off connection between the magnet coil and the excitation power source, and residual energy of the magnet coil is released through the high-power thyristor. The provided excitation power supply has the characteristics of high power, high stability, good repeatability and good linearity; performing numerical control stepping output, gradually applying current to the superconducting coil, and slowly establishing a magnetic field; effective quench protection is achieved, and it is guaranteed that a magnet coil is not damaged by quench.

The invention discloses an SF6 gas density measurement and error compensation system based on dynamic segmented calibration, and relates to the technical field of gas pressure and density measurement, the SF6 gas density measurement and error compensation system comprises a gas pressure sampling module used for amplifying weak analog signals output by a pressure sensor and completing analog-to-digital conversion to obtain digital sampling data used for pressure calculation; the gas density calculation module is used for establishing a density solving model based on a preset physical state equation and outputting a gas density calculation value; and the gas density calibration module is used for carrying out segmented calibration on a pressure interval corresponding to a density calculation value by taking a preset reference pressure point as a reference and outputting a calibrated density measurement result. The invention provides a method for carrying out high-precision sampling and amplification on a weak signal, and solving the density based on rapid iteration of a Betti-Bridgman equation; the invention relates to an SF6 gas density high-precision measuring system which is linked with three systems and is dynamically segmented and asymmetrically calibrated by taking 0.5 MPa as a benchmark.

The invention discloses a static flying spot scanning method based on a flying focus point x-ray source, and belongs to the technical field of x-ray scanning, and the method comprises the following steps: S1, providing a flying focus point x-ray source; s2, providing a static restraint device; s3, controlling the focus of the flying focus x-ray source to move or switch according to a preset scanning mode, so that x-rays irradiate the scanned object point by point through a hole groove or a spiral gap in the static constraint device, and performing flying spot scanning on the scanned object; and S4, collecting a scattering x-ray signal of the scanned object by using a detector, converting the scattering x-ray signal into an electric signal, carrying out analog-to-digital conversion, and carrying out signal processing to generate a scanning image. According to the static flying spot scanning method based on the flying focus point x-ray source, a traditional combination of a fixed focus point and a high-speed mechanical device is replaced by the combination of the electrically-controlled x-ray source capable of changing the focus point and the static constraint device, and the scanning performance is improved.

A method is disclosed for programming analog-valued weights in a non-volatile memory array using feedback-based estimation and adaptive pulse modulation. The method includes initializing a target weight, applying one or more programming pulses to a memory cell, estimating a weight state of the memory cell based on analog-to-digital conversion, determining a residual error between the estimated weight state and the target weight, and computing a subsequent programming pulse based on the residual error. The subsequent pulse may be adjusted by selecting a programming voltage from a quantized set of levels responsive to the recent weight response dynamics. The programming process may iterate until convergence may be achieved within a defined threshold. The technique supports precise control of conductance programming using closed-loop feedback and may be compatible with pulse-width, amplitude, and polarity modulation schemes.

The invention discloses a multispectral intelligent identification system for protein post-translational modification sites, comprising: a spectral data acquisition module for controlling different spectrum analyzers to perform spectrum scanning and analog-to-digital conversion and formatting on protein samples in parallel to obtain multiple protein multispectral original data; the intelligent analysis module is used for carrying out preprocessing and feature extraction on the multi-spectral original data of each protein to obtain a plurality of standardized spectral feature vectors; fusing each standardized spectral feature vector to obtain a multi-dimensional feature vector, inputting the multi-dimensional feature vector into a pre-trained modification site recognition deep learning model, and outputting a recognition result list, the recognition result list comprises the positions of the recognized protein post-translation modification sites in the protein sequence and modification types corresponding to the protein post-translation modification sites; and the result output module is used for visually displaying and exporting the identification result list. According to the method, the accuracy and flux of protein post-translational modification site recognition are remarkably improved.

The invention relates to the technical field of analog and digital-analog hybrid integrated circuits, and discloses a bootstrap sampling switch circuit with a pre-charging function and an analog-to-digital converter. The circuit comprises a sampling switch module and a time sequence control module. The sampling switch module sequentially works at a holding phase, a pre-charging phase and a tracking phase under the control of a multi-phase clock signal generated by the time sequence control module, the pre-charging phase is added before the tracking phase, the grid voltage of a sampling switch is pre-boosted, and the pre-charging time is dynamically controlled by using an adjustable clock circuit, so that the pre-charging time of the sampling switch is dynamically controlled. Therefore, the charge sharing effect caused by the gate parasitic capacitance is effectively suppressed. The analog-to-digital converter comprises the sampling switch circuit. The linearity and the conduction characteristic of the sampling switch are remarkably improved, and the sampling switch has excellent time sequence configurability and is suitable for a high-speed and high-precision analog-to-digital conversion system.

The invention relates to the technical field of thunder and lightning monitoring and protection, in particular to a thunderbolt positioning and energy analysis method and system based on a lightning rod monitoring network. The method comprises the following steps: collecting and verifying a lightning current waveform and a microsecond timestamp in real time, and measuring grounding resistance regularly; the terminal carries out filtering analog-to-digital conversion on the signal and extracts characteristic parameters, after packaging, the priority is set according to the current amplitude, and the priority is uploaded to the cloud platform; the cloud platform is associated with multi-terminal synchronous data, when the number of effective terminals is not less than three, coordinates of a thunderbolt point are calculated, integral operation is performed on a lightning current waveform in combination with actually measured grounding resistance to quantify single-time lightning stroke energy, and historical data are analyzed by using a long-short-term memory network model to realize equipment health diagnosis and life prediction. And displaying the thunderbolt point distribution thermodynamic diagram and the state evaluation report through a visual interface. According to the invention, the whole process management from data acquisition to intelligent decision making is realized, and the accuracy and predictability of lightning monitoring and protection are improved.

The invention belongs to the technical field of image processing, and discloses a three-dimensional radar sub-aperture imaging deformation monitoring device and method, and the device comprises a radar which is used for collecting echo signals passing through a preset position, processing the echo signals according to frequency mixing and analog-to-digital conversion, obtaining a three-dimensional echo matrix, and outputting the three-dimensional echo matrix; the three-dimensional echo matrix and a sampling ending signal are sent to a motion compensation module; the motion compensation module is used for resampling the azimuth direction of the three-dimensional echo matrix by adopting an interpolation algorithm; the distance matching filtering module is used for performing pulse compression on the distance direction of the three-dimensional echo matrix; the migration correction module is used for carrying out migration correction on the distance direction of the three-dimensional echo matrix after pulse compression; the sub-aperture imaging module is used for calculating a three-dimensional echo matrix after migration correction according to a sub-aperture imaging algorithm; and the deformation monitoring module is used for performing interference difference processing on the three-dimensional complex image to obtain deformation data. The imaging quality and the deformation monitoring precision can be improved.

The invention belongs to the technical field of electronic information, and relates to an online low-voltage load monitoring and abnormal tripping positioning method and a related device. According to the method, electrical parameters of all monitoring points are collected in real time, key parameters are calculated after analog-to-digital conversion and filtering denoising, and the key parameters are compared with a set threshold value to judge whether the monitoring points are in an abnormal state or not; once an abnormal state is found, an early warning is generated and uploaded to a remote platform; and continuously monitoring the state of the main switch or the total current at the same time, and when tripping occurs, backtracking an abnormal record within a preset time period before tripping, and positioning the last or the most serious abnormal monitoring point as an abnormal source. The system comprises a data acquisition module, an analog-to-digital conversion module, a preprocessing module, a calculation module, a judgment module, an early warning module, a trip monitoring module and a positioning module. According to the invention, early warning before a fault and rapid positioning after tripping are realized, and the intelligent level, the operation and maintenance efficiency and the power supply reliability of the power distribution network are improved.

The invention relates to the technical field of electronic measurement, and particularly discloses a multi-channel synchronous shunt calibration and data analysis system. The system comprises a signal acquisition front end, a delay measurement and compensation module, a synchronous control module, a data analysis and processing module and a system calibration interface, channel delay deviation is measured through a high-precision time-to-digital conversion circuit, and hardware compensation is realized in combination with a programmable delay line array. And a channel delay model and a recursive estimation algorithm are utilized to dynamically track delay drift caused by environment change, so that dynamic recovery and long-term maintenance of nanosecond-level synchronization precision are realized, and the environmental adaptability and synchronization stability of the system are remarkably improved.

The invention provides a wind turbine generator running temperature monitoring method and system, and the method comprises the steps: installing temperature sensors at a generator, a gear box, a main shaft bearing and a cabin environment of a wind turbine generator, and collecting temperature signals in real time; filtering the acquired signal, sending the filtered signal to a reference temperature unit, and comparing the filtered signal with a standard temperature signal to obtain a deviation; calculating a compensation coefficient according to the deviation and performing temperature drift compensation on the signal; and the corrected signal is digitalized by the analog-to-digital conversion module and then input into the controller. A reference temperature unit and a compensation calculation module are arranged in an acquisition system to form an independent calibration loop. The system reads a standard temperature signal in real time and calculates the deviation while collecting the temperature signal, and then performs linear or segmented correction compensation according to the deviation, so that the measurement error of the thermocouple or the thermistor caused by environment temperature change, aging or lead resistance drift can be effectively counteracted, and the output temperature value is always kept consistent with the actual temperature.

A photoelectric conversion apparatus comprises a pixel region where pixels are arranged in a matrix, a sample hold circuit configured to sample and hold, as a first signal and a second signal, two different signals output from each of two pixels in the pixel region, and an analog-digital conversion circuit configured to perform analog-digital conversion of the second signals from the two pixels after performing analog-digital conversion of the first signals from the two pixels. A time interval between a period set to perform analog-digital conversion of the first signals from the two pixels and a period set to perform analog-digital conversion of the second signals from the two pixels is set longer than a time interval between periods set to perform analog-digital conversion of each of the first signals from the two pixels.

The invention provides an anti-stray magnetic field rotation angle detection method and system for a three-way sensor, and relates to the technical field of sensor signal processing and motor control, and the method comprises the steps: enabling the three-way sensor to be fixed on a circuit board at an interval of 120 degrees, the sensing axes of the sensors face the rotating part with the permanent magnet together, and the magnetic field direction of the permanent magnet is perpendicular to the sensing axes. The sensor collects three paths of mixed signals containing real angle signals and spurious interference generated when the rotating component rotates, then the signals are subjected to Clark transformation to generate two-phase orthogonal signals, and then anti-interference digital signals are obtained through differential processing and analog-to-digital conversion. Then, a deep learning network based on an attention mechanism is adopted to perform feature enhancement on the signals, and finally, the angle of the rotating part is accurately determined by using an angle calculation algorithm based on the enhanced signals. According to the invention, the accuracy and reliability of angle detection in a strong stray magnetic field interference environment are improved.

The analog-to-digital conversion device includes a signal generating unit that generates a plurality of comparison voltages based on an analog input voltage and generates a plurality of comparison results of the plurality of comparison voltages based on a sampling period, a calculation unit that skips a comparison result generated by a comparison voltage having a smallest difference between the analog input voltages among the plurality of comparison voltages from the plurality of comparison results and generates an end of comparison based on a remaining plurality of comparison results, and a SAR logic unit that generates a digital signal corresponding to the end of comparison and stores information for each bit of the digital signal.

The utility model relates to the technical field of dimming and color temperature switching, in particular to an IC chip and a multi-color-temperature switching circuit. A Flash storage module, a timer module, a first analog-to-digital conversion module, a second analog-to-digital conversion module, a third analog-to-digital conversion module, a processing module, a reference generation module, a comparator module, an operational amplifier AMP1, an operational amplifier AMP2, an MOS tube Q1 and an MOS tube Q2 are arranged in an IC chip, and a current setting pin and a first color temperature state setting pin are arranged on the IC chip. The second color temperature state setting pin, the third color temperature state setting pin, the power failure detection pin, the first LED current output pin and the second LED current output pin are matched together to realize the dimming and multi-color-temperature switching functions, so that the IC chip in the scheme can be compatible with the silicon controlled rectifier dimming function and also can realize multi-color-temperature switching.

The present description provides for a method of controlling an analog-to-digital converter. In an example method, the most significant bits are determined by successive approximations. Further, least significant bits are determined by a time-to-digital conversion by applying a first ramp to the output of a first digital-to-analog converter with a third digital-to-analog converter and by applying a second ramp to the output of the second digital-to-analog converter with a fourth digital-to-analog converter. The variation direction of the first and second ramps is determined by the comparison of the outputs of the first digital-to-analog converter and second digital-to-analog converter at the end of the successive approximations.

The invention discloses a low-noise, high-precision and low-power-consumption tunnel magnetoresistance array type magnetic anomaly detection device, and relates to the field of geomagnetic field magnetic anomaly detection. In order to overcome the defects that in the prior art, the detection precision is insufficient, the noise level is high, power consumption is large, and long-time stable operation is difficult to consider, the technical scheme provided by the invention is that a signal acquisition and amplification circuit is composed of a plurality of triaxial tunnel magnetoresistive sensors, an isolation circuit, an instrument amplification circuit and a passive filter circuit; the master control and signal processing circuit is composed of a high-precision analog-to-digital conversion circuit, a clock circuit and a microprocessor circuit. The signal transmission circuit is composed of an Ethernet module and is used for transmitting the processed data to an upper computer; the power supply module is composed of a low-noise low-dropout voltage stabilizing circuit and a reference voltage circuit, and is used for providing a stable power supply and a unified reference voltage. The method is suitable for long-time high-precision geomagnetic anomaly detection work in geophysical exploration, national defense safety monitoring and complex environments.

The invention provides a respiration following atomization control system, which comprises a contact pin interface module, a flow signal interface module, an atomization sheet driving interface module, a flow signal interface module and an atomization sheet driving interface module, and is characterized in that the contact pin interface module at least comprises flow signal contact pins and atomization sheet driving contact pins; an analog-to-digital conversion port of the microcontroller is electrically connected with the flow signal contact pin through a signal acquisition circuit; the output end of the power driving module is electrically connected with the atomization sheet driving contact pin, and the control end of the power driving module is connected with the microcontroller; the power driving module comprises a voltage regulating unit, a BOOST circuit and an oscillating circuit which are electrically connected in sequence; wherein the microcontroller is configured to acquire a flow sensing signal through the signal acquisition circuit, and judge whether the breathing phase of a user is inspiration or expiration; when the inhalation phase is judged, the voltage regulating unit is controlled to output a first regulating voltage, and after the first regulating voltage is converted by the BOOST circuit and the oscillating circuit, an atomizing sheet connected to an atomizing sheet driving contact pin is driven to work; and when the expiration phase is judged, the voltage adjusting unit is controlled to stop outputting or output voltage lower than the first adjusting voltage.

The invention belongs to the technical field of radio frequency identification, and particularly discloses a multi-antenna diversity reception high-frequency RFID signal processing system and method, and the system comprises a multi-antenna array, a multi-channel amplification notch module, a high-frequency-to-intermediate-frequency module, an MRC processing module, an AGC circuit, and a demodulation module which are sequentially connected according to the signal flow direction. Spatial diversity reception is realized through a multi-antenna array, low-noise amplification and self-interference suppression are synchronously completed by the multi-channel amplification trap wave module, amplitude weighting and phase compensation combination of multi-channel intermediate frequency signals are realized by the MRC processing module after frequency spectrum shifting of the high-frequency-to-intermediate frequency module, and the multi-channel high-frequency-to-intermediate-frequency signal is obtained. Power is stabilized through the AGC circuit, signal amplification and analog-to-digital conversion are completed through the demodulation module, and finally pure digital baseband signals are output. Through the technical means, the anti-interference capability and the receiving sensitivity of the high-frequency RFID receiver in a complex environment can be effectively improved, and the requirement for long-distance and high-reliability electronic tag reading is met.