307results about How to "Inhibition effect" patented technology

The invention discloses a short-term photovoltaic power generation power prediction method adaptive to weather change, which comprises the following steps of: firstly, acquiring meteorological data around a photovoltaic panel and power data of a photovoltaic module, preprocessing the data, and dividing a training set and a test set according to a proportion; according to the method, a Bi LSTM-Attention model based on ISSA optimization is constructed, photovoltaic power generation power prediction is realized by capturing time sequence characteristics and historical information of input data, meanwhile, a mean square error between a predicted value and a true value is calculated to continuously fit the predicted value, prediction model parameters can be updated, model self-learning is realized, and the prediction efficiency is improved. And the accuracy of the short-term photovoltaic power prediction value of the prediction model is further improved. According to the method, the short-term prediction precision of the photovoltaic power generation power under different weather conditions is improved, so that a photovoltaic grid-connected system is helped to respond to the control parameter design of the power grid stability requirement, and the support capability of photovoltaic power generation on the power grid is improved.

The invention provides a method for preparing high-purity and fine-particle-size lithium sulfide based on carbon thermal reduction. The method comprises the following steps: weighing lithium sulfate monohydrate, an insoluble inorganic carbon source and cysteine in a set proportion to form a raw material mixture; mixing the raw material mixture with water according to a set solid-to-liquid ratio, performing ultrasonic dispersion to obtain homogeneous dispersion liquid, and enabling the dispersion liquid to pass through a nitrogen circulating spray dryer to obtain uniform and dry precursor powder; in a vacuum environment, carrying out segmented calcination to obtain a crude product lithium sulfide; and in a dry and anhydrous environment, washing the crude product lithium sulfide for multiple times by using absolute ethyl alcohol according to a set liquid-solid ratio to obtain an alcoholic solution containing lithium sulfide, and then obtaining lithium sulfide fine powder through a nitrogen circulating spray dryer. The invention solves the problems of side reaction, low purity, large product particles, uncontrollable particle size and the like of lithium sulfide prepared by a carbon thermal reduction method in the prior art.

According to the robust beam forming method for the AN enhanced RIS assisted physical layer security communication, the transmitting power of a base station is minimized on the premise that the system service quality requirement and the security rate outage probability constraint are met. The method comprises the following steps: firstly, constructing a security rate interruption constraint based on a base station-RIS-eavesdropper cascade channel transmitting end imperfect CSI model, and then approaching a security rate interruption probability constraint by using a Bernstein inequality, thereby reexpressing an original problem as a processable convex constraint. Under an alternating iterative optimization framework, positive semi-definite relaxation is utilized to convert a sub-problem into a convex problem, a sub-optimization problem of a given beam forming vector optimization RIS phase shift matrix is rewritten, a slack variable is introduced to re-express an original feasibility verification problem, and finally a base station transmitting beam forming vector is iteratively optimized. The AN beam forming vector and the RIS reflection beam forming matrix improve the system safety rate and the system robustness.

The invention discloses an active damping control system for improving the output impedance of a current source type inverter, which comprises a current loop control loop, an active damping branch and an improved phase-locked loop, and is characterized in that the difference value of reference current and feedback network access current passes through a current controller to form the current loop control loop; the voltage of the grid-side inductor is fed back to the output of the current loop through the virtual resistor link to form a damping branch, and the voltage of the common coupling point enters the traditional phase-locked loop link through the low-pass filter and forms an improved phase-locked loop through phase compensation. The optimal feedback coefficient of the damping branch is designed according to the optimal damping ratio, the low-pass filter parameters are designed according to the phase at the maximum resonant frequency, the reasonable proportional gain link is designed according to the improvement of the output impedance amplitude, the resonance of the current source type inverter can be effectively inhibited, the output impedance of the inverter is increased, and the output impedance of the inverter is improved. And the quality of the network access current of the current source type inverter and the stability margin of the current source type inverter in a weak power grid are improved, and the stability of the system is improved.

The invention discloses an environment-friendly safe low-smoke halogen-free cable, and relates to the technical field of cables, the environment-friendly safe low-smoke halogen-free cable comprises a cable assembly, the cable assembly comprises an outer sheath, the outer surface of the outer sheath is fixedly communicated with an air outlet assembly, a plurality of conductors are arranged in the outer sheath, each conductor is hollow, and the outer surface of the outer sheath is fixedly communicated with the air outlet assembly. A plurality of filling pipes are arranged among the exteriors of the plurality of conductors, and the plurality of filling pipes are hollow; according to the environment-friendly safe low-smoke halogen-free cable, when the temperature of air around the cable is low, cold air enters the hollow conductor from the air inlet, air convection is formed in the conductor, heat is taken away and then discharged from the air outlet, and when excessive heat is generated in the use process of the conductor, the heat can enter the filling pipe through the multiple drainage holes, so that the cable is protected. And heat can flow in the conductor, so that excessive local heat dissipation of the conductor can be prevented.

The invention relates to the technical field of adaptive optics, and particularly provides a wavefront detection system for a dark and weak target under a strong sky background, the wavefront detection system comprises a Shack-Hartmann wavefront sensor system and a wavefront detection processing unit, the Shack-Hartmann wavefront sensor system carries out wavefront detection on a short wave infrared band of 1.3-1.7 [mu] m, and the wavefront detection processing unit carries out wavefront detection on the short wave infrared band of 1.3-1.7 [mu] m. And the wavefront detection processing unit corrects a sub-aperture image obtained by detection through a weighted self-threshold local contrast algorithm, performs self-threshold operation on pixels in a center unit according to a gray scale ratio weight of the center unit and a background unit of the sub-aperture image, introduces an energy weight to eliminate PNHB noise, and reconstructs a centroid of the sub-aperture image. According to the invention, a Shack-Hartmann wavefront sensor system is applied to a short-wave infrared band, so that a sky background spectrum is effectively blocked, the target brightness is ensured, background light radiation photons received by a detector are reduced to the greatest extent, various noises and background interferences are inhibited by optimizing a threshold algorithm, and the wavefront detection precision is remarkably improved.

The invention relates to a hyperspectral image Mars surface mineral identification method and device, equipment and a medium. The method comprises the following steps: acquiring a hyperspectral image for a mineral on the Mars surface; and inputting the hyperspectral image into a pre-trained recognition model, performing layer-by-layer extraction of pixel point features on the hyperspectral image through each layer of classification module in the recognition model, and obtaining a recognition result of the minerals on the surface of the Mars based on the pixel point features obtained through layer-by-layer extraction. Through the method of the invention, high-resolution and high-precision rapid detection can be carried out on Mars minerals through a machine learning technology.

The present invention belongs to the field of quantum navigation and positioning technology, and discloses an inter-satellite ranging system, method, device and data processing terminal. The inter-satellite ranging system includes: a photon transceiver unit, which is used to generate entangled photon pairs, transmit signal photons to the satellite to be measured and the internal optical path, and receive signal photons reflected by the satellite to be measured and the internal optical path; a coincidence counting unit, which is used to associate the received signal photons with the idle photons to obtain their second-order correlation curves; a distance measurement unit, which is used to perform DFT phase difference weighted processing on two second-order correlation curves generated by the optical path difference inside and outside the system to obtain the actual optical path difference from the satellite to be measured to the system. The present invention uses a photon matching method to filter out the cosmic space stray light entering the photon detector to a large extent, thereby improving the signal-to-noise ratio. The present invention adopts an improved coincidence counting algorithm, and the calculation rate is greatly improved compared with the traditional coincidence counting algorithm.

The invention discloses a novel phonon transistor pile, which belongs to the technical field of soil vibration reduction and comprises a pile tip, a pile body and a plurality of ABH-L.R. Combined vibration reduction units. The pile tip is located at the bottom end of the pile body. The ABH-L.R. Combined vibration reduction units are periodically distributed in the pile body from bottom to top along the height of the pile body and connected with the pile body through elastic materials. The ABH-L.R. Combined vibration reduction units are periodically arranged in the pile body, vibration is gathered in the center of the structure through the two-dimensional acoustic black hole plate, energy is dissipated through the energy dissipation characteristic of the constraint damping layer arranged in the center of the two-dimensional acoustic black hole plate and the local resonance effect generated by the L.R. Phononic crystal unit cells, the tubular pile can have the elastic wave band gap characteristic, and the elastic wave band gap vibration reduction effect is achieved. Low-frequency vertical vibration can be effectively filtered, and the influence of the vertical vibration on a building is restrained.

The invention relates to the technical field of measurement, in particular to a well deviation and geomagnetic field intensity measurement system based on a high-precision fluxgate sensor. Comprising a fluxgate sensor group, a magnetic field data analysis part and a measurement result calculation part, the fluxgate sensor group comprises high-precision fluxgate sensors for respectively measuring magnetic field components in the X-axis direction, the Y-axis direction and the Z-axis direction; the magnetic field analysis part is used for constructing a magnetic field gradient tensor according to the physical parameters of the high-precision fluxgate sensor, the effective magnetic conductivity and the corrected magnetic field component in each direction, and separating a geomagnetic field vector from the total magnetic field vector according to the magnetic field gradient tensor; and the measurement result calculation part is used for calculating a hole drift angle value and an azimuth angle value according to the geomagnetic field vector. According to the method, the precision, robustness and environment adaptability of underground magnetic field measurement are remarkably improved. The geomagnetic field vector can be accurately extracted, and high-precision calculation of the hole drift angle and the azimuth angle is achieved.

The invention discloses a bridge construction displacement monitoring device, which relates to the field of bridge safety and includes an infrared monitoring sensor, wherein the front and rear of the infrared monitoring sensor are both provided with a connection structure, wherein the connection structure includes a fixed ball seat, wherein the interior of the fixed ball seat penetrates through the front and is rotatably connected to a ball hinge body, wherein the outer surface of the ball hinge body is fixedly connected to a connecting rod 1, wherein one end of the connecting rod 1 is fixedly connected to a connecting frame, wherein a sliding plate is provided inside the connecting frame, wherein the top, bottom and both sides of the sliding plate are fixedly connected to sliders, wherein four sliding grooves are provided inside the connecting frame, wherein six springs are provided between the rear of the sliding plate and the rear of the interior of the connecting frame, and a ball shell is fixedly installed at the front of the sliding plate. By providing a connection structure, the invention not only prolongs the service life of the device, but also ensures the accuracy and reliability of the monitoring data.

The invention provides a successive approximation analog-to-digital converter with mismatch calibration, and relates to the field of semiconductor integrated circuits. The successive approximation analog-to-digital converter comprises a sampling hold circuit, a differential capacitor array, a comparator module, a successive approximation logic circuit and a calibration logic circuit. The differential capacitor array comprises a successive approximation bit capacitor array, an automatic balance capacitor array and a calibration capacitor array. The successive approximation bit capacitor array is used for quantizing the analog input voltage to generate an analog output voltage. The successive approximation bit capacitor array comprises a redundant bit capacitor, and the redundant bit capacitor is used for calibrating digital deviation in the quantization process. The automatic balancing capacitor array and the calibration capacitor array are respectively connected with a P end and an N end of the successive approximation bit capacitor array, the automatic balancing capacitor array is used for balancing common-mode voltages of the P end and the N end, and the calibration capacitor array is used for calibrating the digital weight of the successive approximation bit capacitor array. According to the invention, the influence of noise and common-mode voltage offset on the analog-to-digital conversion precision can be reduced.

The invention discloses a carrier synchronization control method with multiple converters connected in parallel, electronic equipment and a storage medium, each converter corresponds to a control unit, each control unit is integrated with a corresponding accumulation counter, one converter is used as a host, the other converters are used as slaves, the method is applied to any slave, and the control unit is integrated with a corresponding accumulation counter. Comprising the following steps: receiving a preset low-frequency synchronization signal generated and sent by a host; capturing a rising edge or a falling edge of the low-frequency synchronizing signal; when the rising edge or the falling edge of the low-frequency synchronization signal is captured every time, collecting the current carrier value and the maximum carrier value of the carrier signal output by the corresponding control unit; and according to the current carrier value and the maximum carrier value, adjusting the carrier count value of the corresponding accumulation counter, so that the carrier signal of the slave computer and the carrier signal of the host computer are synchronized in phase. According to the invention, a low-frequency signal is used as a synchronization mechanism, so that normal operation and efficient output of the multi-machine parallel system are ensured, and the high-frequency synchronization precision is improved.

The invention discloses a band-gap reference circuit with a second-order temperature compensation and a high power supply rejection ratio in the technical field of semiconductor circuits. The band-gap reference circuit comprises a starting circuit which is used for providing a bias current when the circuit is started and preventing the circuit from working at a stable working point where the current of positive and negative feedback branches at the input end of an operational amplifier circuit is zero; the operational amplifier circuit is used for clamping, and the voltages of the two input ends of the operational amplifier are approximately equal by utilizing the virtual short characteristic; the second-order temperature compensation circuit is used for compensating linear and non-linear terms in base-emitter voltage of the bipolar transistor and reducing the temperature drift of the band-gap reference circuit; the reference voltage output circuit is used for outputting reference voltage, providing a stable and accurate reference voltage source and meanwhile participating in control over starting current generated by the starting circuit. The circuit is innovative and efficient, stable reference voltage with small temperature excursion can be provided, and meanwhile the circuit has a large voltage input range, a high power supply rejection ratio and a reliable starting circuit.

A pipeline deviation full-orbit fitting method of a strict regression orbit satellite can determine single-point pipeline deviation on the basis of alignment of a reference trajectory coordinate system and an orbit cutting plane according to the characteristics of a strict regression orbit, and can also perform calculation and curve fitting on data of at least one orbit. And the fitted maximum deviation is used as the pipeline deviation of the satellite, so that comprehensive analysis of strict regression precision of the satellite is carried out, limitation of single-point pipeline deviation calculation is effectively overcome, and meanwhile, the influence of single-point error data on pipeline deviation calculation can be inhibited by adopting a curve fitting method, so that the accuracy of pipeline deviation calculation is improved. And the calculation result is more accurate and reliable.

A ferrule (1) for an optical connector is a member in which an optical fiber is fixed, and the tip side becomes a connection end surface (7) of the optical fiber. Furthermore, the ferrule (1) for an optical connector is formed from a PPS (polyphenylene sulfide) resin containing a filler (for example, inorganic fibers or a filler), for example, by injection molding. The internal space (13) communicates with the front end side of the ferrule (1) for the optical connector and serves as a hole (9) through which an optical fiber is inserted. The ferrule (1) for an optical connector according to the present embodiment has a shrinkage rate of 0.13% or less at 260 DEG C for 1 minute.

The invention discloses a low-cost embedded real-time high-precision positioning system based on a BDS + GPS dual-system adaptive fusion RTK resolving algorithm. The self-designed low-cost embedded high-precision positioning system comprises an LTE-CAT1 network communication module with an embedded open source SOC processor, a low-cost GNSS satellite signal receiving module, a power management unit, a gravitational acceleration chip and a related connector, and comprises a BDS + GPS dual-system adaptive fusion RTK resolving algorithm. The algorithm comprises the following steps: establishing an RTK double-difference observation equation according to original observation data of BDS + GPS dual systems of a base station and a moving station; carrying out Kalman filtering solution and robust Kalman adaptive filtering estimation; fusing Hurmet variance component estimation; and the RTK ambiguity of the BDS + GPS dual system is fixed. According to the invention, multiple robust estimation is added, so that the low-cost embedded high-precision positioning system can achieve a centimeter-level high-precision stable positioning result in a complex environment. The invention belongs to the technical field of navigation and positioning, and particularly relates to a low-cost embedded real-time high-precision positioning system based on a BDS + GPS dual-system adaptive fusion RTK resolving algorithm.

The invention relates to the technical field of deformation monitoring, and particularly discloses a radar interferogram processing method and device fusing a GNSS spatial interpolation result, and a medium, and the method comprises the following steps: carrying out the refined processing of each error term in GNSS displacement time series data, screening an InSAR interferogram according to the length of a space-time baseline and the number of effective pixel points, and carrying out the calculation of the InSAR interferogram; the method comprises the following steps: acquiring a GNSS spatial interpolation result, enabling the GNSS interpolation result to perform weighted fusion after time alignment with an InSAR interferogram, performing small baseline set time sequence analysis processing on the processed InSAR interferogram, and improving the precision and reliability of a deformation fusion result. According to the method, the InSAR interferogram error is corrected based on the GNSS spatial interpolation result, and the atmospheric error in the InSAR interferogram is corrected by using the GNSS spatial interpolation result and the InSAR interferogram weight fusion, so that the precision of correcting the InSAR interferogram by the GNSS data is higher, and the stability of the displacement time sequence result is better.

The utility model provides a storage tank for hydrogen storage, which comprises a base and a storage tank body, the storage tank body is arranged at the middle end of the top of the base, a hydrogen sensor is arranged at the top of the storage tank body, a leakage protection component is arranged on the base, and the leakage protection component is arranged on the base. The leakage protection assembly comprises a transmission box, a servo motor, a protection cover and a welding rod, and the transmission box is welded to the middle end of the bottom of the base. By arranging the hydrogen sensor, the storage tank body can be monitored, and when hydrogen leakage occurs, the leakage protection assembly can be started through the central processing unit and the control module to cover the storage tank body, so that the harm of hydrogen leakage to the surrounding environment and personnel can be reduced; the method can reduce the risk of fire disasters, explosions or other safety accidents, can also restrain the influence of hydrogen leakage on the atmosphere and water sources, reduces environmental pollution, protects the ecological system, and meanwhile can reduce the loss of hydrogen, reduce the cost and save resources.

The invention belongs to the technical field of batteries, and provides a sodium ion battery positive electrode material and a preparation method thereof, a positive electrode plate, a battery and an electric device. The sodium ion battery positive electrode material comprises a sodium-containing positive electrode material substrate and a coating layer coating at least part of the surface of the sodium-containing positive electrode material substrate, wherein the coating layer comprises metal phosphate at least containing a sodium element and an aluminum element. A battery prepared from the sodium-ion battery positive electrode material has the characteristics of high battery capacity, good cycling stability and the like.

The embodiment of the invention relates to a suspension collaborative steering and fault-tolerant method for a wave adaptive unmanned ship, and the method comprises the steps: collecting the environment perception information and attitude data of the unmanned ship in real time, and carrying out the fusion processing, and generating a multi-source data matrix; pre-judging the front sea condition based on the multi-source data matrix, and when the sea condition characteristic parameters meet preset dynamic adjustment conditions, adjusting the expansion and contraction amount of each group of electromagnetic suspensions in a pre-judgment time window so as to form a draught gradient adapting to the sea condition change; when a steering instruction is received, the draft difference of floating bodies on the two sides of the unmanned ship and the thrust difference of propelling systems on the two sides are synchronously adjusted, so that the steering track is controlled, and transverse inclination of the ship body is restrained; in the sailing process, the working states of the electromagnetic suspension and the propelling system are monitored in real time, faults are classified, when it is detected that the execution units are abnormal, a fault-tolerant reconstruction strategy is triggered according to the fault types, and stress distribution or propelling thrust is reconstructed by locking abnormal parts and utilizing the remaining execution units, so that the sailing capacity of the unmanned ship is maintained.

The invention relates to a method for improving initial pointing precision of a laser communication terminal. The method comprises the following steps that an equipment terminal is initialized to operate, and a double-end terminal turntable is adjusted according to positioning data output by a GPS positioning system; obtaining attitude data of the rotary table through the master control slave equipment terminal; performing mean filtering operation on the data in the process of acquiring the data to suppress high-frequency interference components in the data; solving a fitting value of the group of data by utilizing a linear fitting method; solving a low-frequency interference component in the group of data through the fitting value and a data result obtained through operation in the step 2; calculating attitude data after the low-frequency interference component is removed, wherein the data is used as an attitude measurement value after the low-frequency interference component is removed; and performing Kalman filtering operation, taking a correction value obtained by the set operation as a pointing attitude value of the turntable, and fixing the terminal turntable according to the obtained attitude value of the turntable. According to the method, the problem of aiming direction deviation of the laser communication terminal equipment caused by data errors generated by GPS interference can be effectively solved.

The invention discloses a template matching method and device for visual features, equipment and a storage medium, and relates to the technical field of template matching, and the method comprises the steps: carrying out the training of a deep classification neural network model through a public image data set, and improving a neural network structure, and building a target template matching model; extracting template image features and to-be-matched image features from a target template image data set and a to-be-matched image through the target template matching model; simulating a sliding window, taking the template image feature as a convolution kernel, and calculating an approximate cosine similarity between the template image feature and the to-be-matched image feature; and determining a template matching result from the approximate cosine similarity according to a maximum pooling operation and a similarity threshold method. According to the method, feature extraction and matching are carried out by using the deep classification neural network model, the matching precision and the calculation efficiency are improved, the generalization ability is enhanced, and the matching error rate is reduced.

The invention discloses a built-in sound field measuring device for high-voltage electrical equipment and a space optimization arrangement method, which comprise the design of an internal fiber bragg grating acoustic sensor and an external measuring loop of the high-voltage electrical equipment and the design of a space optimization arrangement scheme, and the device comprises the internal fiber bragg grating acoustic sensor and the external measuring loop. The detection frequency band of the fiber bragg grating acoustic sensor is designed according to the length of the grating region, and both ultrasound and audible sound are considered; polyimide is used as a coating material of the fiber bragg grating, so that high temperature resistance and insulation performance are better; the glass fiber reinforced plastic is used as a packaging material of the fiber bragg grating, so that the fiber bragg grating has higher mechanical strength and durability; a noise reduction device is designed according to the interference principle, and interference of optical noise in a measurement loop is suppressed; through the design of a transfer function and cut-off frequency, band-pass filtering is transplanted into a data collector, and the influence of high and low frequency interference during sound signal collection is inhibited. A space optimization arrangement scheme is designed in combination with various constraint factors, and the engineering application value of the measurement device is improved.

The invention provides an electromagnetic detection system based on a seabed crawl device, and belongs to the technical field of geophysical exploration, the electromagnetic detection system comprises a survey ship, the seabed crawl device, a transmitting antenna, a receiving node array, a control chip and a power supply, the survey ship is connected with the seabed crawl device through a traction rope, the tail part of the seabed crawl device is provided with a dragging cable, and the dragging cable is connected with the control chip. The transmitting antenna and the receiving node array are fixed on a dragging cable; the control chip and the power supply are arranged in an integrated electronic cabin of the seabed crawler; the power supply provides electric energy for the seabed crawler, the transmitting antenna, the receiving node array and the control chip, and the control chip is electrically connected with the transmitting antenna, the receiving node array and a power system of the seabed crawler; and an electromagnetic detection interference compensation module is arranged in the control chip and is used for performing interference elimination and compensation on reflected waves received by the receiving node array. The technical problem of insufficient detection precision in the prior art is solved.

The invention provides a low-flow-resistance underwater sound insulation device which is characterized by comprising a plurality of air bags with the longitudinal sections in the shape capable of being densely laid. A set gap is kept between every two air bags, and the air bags are perpendicular to the water surface The device has the advantages that the broadband sound insulation performance is excellent, the main frequency band of underwater noise measurement is covered, and the influence of various noise sources on the test environment can be effectively inhibited; the hydrodynamic compatibility is good, the through-flow design of air bag array arrangement can maintain low flow resistance while realizing sound isolation, and significant disturbance to a test environment is avoided; and the modular design of the air bag is convenient to install, maintain and expand, and large-scale deployment in various water area environments is facilitated.

The present invention provides a sample selection method and device, and a classifier training method and device, which are applied to a single-stage target detector, wherein the sample selection method includes: constructing a cost function that simultaneously considers classification loss and regression loss; using the cost function to calculate the cost of all candidate samples according to the prediction information output by the detection network and the target true value; using prior information to screen candidate samples; sorting the screened candidate samples according to the cost, and selecting the candidate samples with the highest priority. N The samples with the lowest cost are positive samples, and the rest are negative samples. The classifier training method and device distinguish all positive samples according to the IoU value between the regression box and the target box, improve the contribution of high-quality candidate samples to the classification loss, and suppress the influence of low-quality samples.

This invention discloses a ship dynamic positioning anti-interference control method considering vertical dynamic optimization, comprising: establishing a four-degree-of-freedom nonlinear dynamic model of the ship and obtaining the error vector by combining the desired pose; defining a virtual control law by backstepping and processing the velocity error using a first-order filter; approximating the uncertainties in the model based on an improved Actor-Critic reinforcement learning framework and designing an interference observer to estimate external disturbances; calculating the compensated desired acceleration by combining the approximation output of the uncertainties, the estimated value of the external disturbances, and the velocity error; obtaining the thruster pitch ratio based on the desired acceleration and generating the final control command through a thrust distribution model. This invention can effectively handle model uncertainties and external environmental disturbances in ship dynamic positioning, especially optimizing vertical dynamic performance and improving control accuracy, response speed, and system robustness.

The present application relates to the field of one-way valve check detection technology, and specifically to a one-way valve check performance detection method and system, which specifically includes: obtaining the first and second check fluctuation sets of each local check sequence by classifying the data in the neighborhood of the air pressure difference at each moment, and constructing the local check fluctuation value based on the data discreteness in the first and second check fluctuation sets; classifying the elements in the local check sequence based on the data anomaly and data discreteness of the local check fluctuation value, and obtaining the replacement value of the central element of the local check sequence based on the classification result; obtaining the pressure difference correction sequence based on the sequence composed of the replacement values; and performing the one-way valve check performance detection based on the difference between the pressure difference correction sequences under all kinds of air pressure. The influence of vibration noise on the pressure difference data is suppressed, the accuracy of the air pressure difference data at both ends of the one-way valve is improved, and the accuracy of the one-way valve check performance detection is thereby improved.

The invention provides a PCB hole metallization method based on electric leakage influence suppression and a PCB. The PCB hole metallization method based on suppression of the electric leakage influence comprises the following steps: carrying out hole conditioning treatment for cleaning grease on the surface of a PCB; micro-etching treatment: removing oxides on the copper surface of the PCB and etching the copper surface of the PCB; wherein the micro-etching grounding conductor is arranged in the micro-etching cylinder, and if electric leakage occurs, the micro-etching grounding conductor is used for absorbing charges of liquid medicine in the micro-etching cylinder, so that the micro-etching grounding conductor is used for guiding the charges of the liquid medicine in the micro-etching cylinder to the floor stand; preimpregnation treatment: forming a protective film on the hole wall and the surface of the PCB; activating treatment is carried out to enable the palladium colloid to be attached to the hole wall of the PCB; acceleration processing: stripping the tin colloid layer on the surface of the PCB and in the hole to expose the palladium colloid layer; and carrying out chemical copper treatment for forming a copper layer on the hole wall of the PCB. Therefore, the part, immersed into the micro-etching cylinder, of the micro-etching grounding assembly has high corrosion resistance, and the service life of grounding treatment is prolonged.