252 results about "Pulse frequency" patented technology

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

The invention provides a transformer anti-short circuit capability quantitative evaluation method and system based on multi-physics field simulation mapping, and belongs to the technical field of transformer anti-short circuit capability evaluation. Comprising the following steps: obtaining structure parameters of a to-be-tested type transformer, and constructing a multi-physics field coupling simulation model; running a preset defect working condition by using the multi-physics field coupling simulation model, and calibrating an anti-short-circuit capability limit value corresponding to the defect working condition according to the running data; applying a unit pulse voltage excitation signal, and obtaining a feature vector corresponding to the defect working condition based on the frequency domain response curve; analyzing the mapping relation by using a polynomial regression algorithm to obtain an anti-short-circuit capability quantitative evaluation function; and in a power failure off-line state of the transformer, injecting a unit pulse voltage excitation signal into the winding by using a pulse frequency response tester, calculating an anti-short-circuit capability limit value corresponding to an actually measured operating temperature value according to the anti-short-circuit capability quantitative evaluation function, and evaluating the anti-short-circuit capability of the transformer in combination with a rated thermally stable current.

The invention provides a nutrition pump drop identification method, a nutrition pump and electronic equipment, and relates to the technical field of drop identification, and the nutrition pump drop identification method comprises the steps: obtaining liquid drop detection signals collected by multiple infrared receiving channels; performing signal conditioning processing on each path of liquid drop detection signal to obtain multiple paths of pulse signals; combining the multiple paths of pulse signals into a single-path effective pulse sequence by using redundancy decision logic; and calculating the real-time dripping speed according to the pulse frequency of the single-path effective pulse sequence. According to the scheme, the liquid drop detection signals of the multiple infrared receiving channels are collected in parallel, or operation merging is carried out on the multiple pulse signals through the redundancy judgment logic, effective recognition of liquid drop events can still be maintained when part of channel signals fail, and therefore the fault-tolerant capability and robustness of the detection process are improved.

The invention provides a geographic information surveying and mapping data processing method and system, and the method comprises the steps: obtaining terrain superpixels, carrying out the segmentation operation of the terrain superpixels, obtaining terrain superpixel blocks, carrying out the pulse frequency coding operation of the terrain superpixel blocks, obtaining a pulse frequency sequence, and carrying out the pulse delay coding operation of the terrain superpixel blocks. The method comprises the steps of obtaining a pulse frequency sequence, obtaining a pulse delay sequence, adjusting pulse density through terrain superpixels, obtaining pulse density, carrying out feature integration on the pulse frequency sequence, the pulse delay sequence and the pulse density, and obtaining a structured feature tensor. The method comprises the following steps: obtaining original point cloud data, carrying out position calibration on the original point cloud data through equipment movement track data, carrying out feature extraction on original point cloud according to a structured feature tensor, obtaining a terrain block map with a classification label, and improving the accuracy of geographic information surveying and mapping data while ensuring terrain continuity.

The invention relates to the technical field of analysis instrument ionization sources, in particular to a VUV lamp ionization source device with efficient heat dissipation capacity. The device comprises a VUV lamp, a heat dissipation unit, a VUV lamp driving electrode, a driving circuit and an ion guide focusing unit. The heat dissipation unit carries out cooperative heat dissipation on the VUV lamp and the pulse transformer through a fan, and the problems of signal attenuation and device aging caused by temperature rise are solved. The driving electrode adopts a pairwise pairing structure of upper and lower and left and right electrode pairs to form an inclined electric field to prevent ions from bombarding the lamp wall and the light window; the drive circuit is a half-bridge or full-bridge topology, can adjust the pulse frequency and the power supply voltage, and achieves the switching between a high-voltage low-frequency mode and a low-voltage high-frequency mode. The ion guide focusing unit efficiently leads out and separates ions through cooperation of a conical focusing electric field and a conductive film forward electric field. Through four-dimensional innovation of heat dissipation, electrodes, driving and transmission, the stability, the service life and the detection sensitivity of the device are improved, and the device is suitable for analytical instruments such as ion mobility spectrometry and mass spectrometry.

The invention provides a pulse detection method, communication equipment, a storage medium and a program product. The method comprises the following steps: acquiring a communication signal according to a clock reference signal of a receiver; after the first pulse detection result of the communication signal is passed, acquiring a control state of pulse frequency drift check of the communication signal; and according to the control state and the clock reference signal, pulse frequency drift detection is controlled to be enabled until pulse detection of the communication signal is completed. According to the invention, after the first pulse detection result of the communication signal is passing and the control state of obtaining the pulse frequency drift detection of the communication signal is forbidden, the pulse frequency drift detection is controlled to be enabled based on the clock reference signal and the correctness verification result, so that the control accuracy of pulse detection is improved, and the accuracy of pulse detection is improved. And the problem that a large amount of invalid software / hardware redundancy and resource waste exist under the working conditions that the configuration clock reference of the receiver is inconsistent, the number of configured half bytes of the receiver is inconsistent with the number of configured half bytes of the transmitter or the communication is unstable at the beginning is avoided.

The invention relates to the technical field of sound therapy relaxation and sleep aiding, in particular to a staged sound scene guided multi-sound-source relaxation and sleep aiding method. A multi-sound-source sound scene output model is constructed by taking a sound bowl as a core sound source, and a parameterized control structure of a sound source set and sound mixing gain is established. A time sequence model of four stages of entering, transition, maintaining and quitting resetting is constructed according to the respiration and pulse frequency of a user, and stable stage switching is achieved by combining continuous meeting of time criteria. Structured breathing guidance is introduced in the entering stage, a sound bowl is used as a sensing anchor point in the transition and maintenance stage, paragraph arrangement is adopted, binaural rhythms are selectively superposed, and sound sources are decreased progressively according to the priority and reset prompts are added in the exiting stage. And a personalized scheme is generated by recording user data self-adaptive adjustment parameters. According to the invention, stage switching is realized to fit the physiological state, individual differences are adapted, the relaxed state is ensured to be continuous and stable, the reset quit is stable and smooth, the application scene is diversified and wide, and the relaxed sleep-aiding effect and the overall use experience are remarkably improved.

This application discloses a method and apparatus for active slag removal in water-guided laser deep hole machining based on pulse-modulated water pressure, relating to the field of water-guided laser machining technology. It includes: setting a base pressure for water-guided laser deep hole machining; applying a periodic modulation signal to a high-pressure water supply system based on the set base pressure, causing the water jet output pressure to periodically pulsate near the base pressure with an initial pulse frequency and modulation amplitude, thereby creating a pumping force for slag removal within the machined hole; during the water-guided laser deep hole machining process, utilizing the high-pressure scouring and low-pressure backflow pumping effect generated by the water jet output pressure to remove accumulated water and molten slag from the bottom of the machined hole; acquiring the current machining depth in real time, and adjusting the pulse frequency of the periodic modulation signal based on a preset mapping relationship between the machining depth and the pulse frequency, so that the pumping effect matches the current hole depth. This solves the problems of existing slag removal methods, such as complex hardware, poor depth adaptability, and limited deep hole machining effects.

The invention discloses a power conversion circuit and a control method thereof. The power conversion circuit comprises a transformer, a resonant capacitor, a resonant inductor, an upper bridge transistor, a lower bridge transistor and a control circuit. The transformer comprises a primary coil and a secondary coil. The primary coil, the resonant capacitor and the resonant inductor are connected in series between the switching node and the ground terminal. The upper bridge transistor supplies an input voltage to the switching node based on an upper bridge driving signal. The lower bridge transistor couples the switching node to a ground terminal based on a lower bridge driving signal. The control circuit is operated in a pulse frequency modulation mode to generate an upper bridge driving signal and a lower bridge driving signal at a switching frequency. When the switching frequency exceeds a first threshold value, the control circuit switches from the pulse frequency modulation mode to the pulse width modulation mode.

This invention relates to the field of AC servo system technology, specifically to an FPGA-based method and system for frequency division output of position feedback pulses from an AC servo serial communication encoder. The method includes the following steps: periodically reading encoder position feedback data and calculating the difference between the position feedback data read in the current cycle and the position feedback data read in the previous cycle; converting the difference in position feedback data into a uniformly distributed pulse signal PCLK within the encoder position feedback data sampling period; using the pulse signal PCLK as a trigger clock to perform DDA calculation on the required number of output pulses per revolution, changing the state of the quadrature output pulses each time an overflow occurs, thereby generating frequency-divided quadrature pulse signals A and B. This invention provides an FPGA-based method for frequency division output of position feedback pulses from an AC servo serial communication encoder, which can realize frequency division output of serial communication encoder position feedback pulses according to the requirements of a host device.

This invention discloses a high-speed sweeping fiber optic light source. The specific device includes: a mode-locked pulse light source, an optical fiber amplifier, a highly nonlinear optical fiber, and a dispersion-compensating optical fiber. The passively mode-locked pulse light source outputs a high repetition rate, wide-spectrum mode-locked pulse. Its dispersion propagation follows a parabolic differential equation similar to one-dimensional paraxial diffraction, analogous to Fraunhofer diffraction. The pulse is amplified outside the cavity by an optical fiber amplifier to increase the laser pulse energy and peak power. Then, it is broadened by the highly nonlinear optical fiber to obtain a supercontinuum light source. Finally, the pulse is stretched by a highly dispersive medium provided by the dispersive optical fiber, and the pulse frequency domain spectrum is mapped to a time domain waveform, thereby realizing a high-speed sweeping frequency light source in the time domain.

A method is provided for operating a wireless charger having a multi-switch inverter which supplies an output PWM signal to a resonant circuit in response to switching control signals, including a first set of continuous excitation phase switching control signals (which generate the output PWM signal to have alternating positive and negative pulses having a first pulse frequency) and a second set of free resonance signal sensing phase switching control signals (which enable the resonant tank circuit to generate a resonant decaying output voltage signal in the presence of a foreign object that is located near the wireless charger), where each continuous excitation phase switching control signal includes a plurality of positive or negative excitation pulses having the first pulse frequency, and where one or more quality factor parameters of the wireless charger are measured based on one or more electrical parameters of the resonant decaying output voltage signal.

The present application relates to the technical field of target object trajectory determination, and provides a target object trajectory determination method, device, electronic equipment and computer readable storage medium.The method comprises the following steps: obtaining an optical pulse signal from an optical fiber; determining an optical pulse phase change and an optical pulse frequency change of the optical fiber caused by a target object according to the optical pulse signal; determining an action trajectory of the target object based on the optical pulse phase change and the optical pulse frequency change; and sending an alarm signal to a target device based on the action trajectory of the target object.The method can effectively solve the deficiency of traditional monitoring technology in the application of nuclear power plants, and significantly improve the reliability and efficiency of safety monitoring.

This invention provides a vacuum regulating valve pressure control system and its control method, relating to the field of vacuum regulating valve pressure control technology. The control method includes obtaining a specified rotational speed through a valve rotational speed model, and then controlling the valve plate of the vacuum regulating valve to rotate to a specified angular position based on the specified rotational speed; the valve rotational speed model is established based on the PWM pulse frequency and the Simoid function. The control method of this invention solves the problem that current vacuum regulating valve pressure control systems cannot meet the response speed and stability requirements of production lines, achieving the effect of improving system response speed and stability.

The embodiment of the invention relates to the technical field of pulse diagnosis, and discloses a pulse analysis method based on a pulse diagnosis instrument, which comprises the following steps: processing a pressure change signal within a set time to obtain an original pulse waveform signal associated with a user; performing high-frequency denoising processing on the first pulse frequency signal according to a set noise threshold value; acquiring all wavelet coefficients associated with the high-frequency detail signal, traversing all the wavelet coefficients, determining that the absolute value of the wavelet coefficient at a certain point is greater than the absolute value of the wavelet coefficient adjacent to the wavelet coefficient, and taking the wavelet coefficient as a signal abrupt change point; generating a corresponding pulse image of the user based on the pulse condition data of the user within a set time range; and inputting the obtained pulse condition graph of the user into a pre-constructed standard pulse condition model to determine a pulse condition type result of the user, and outputting the pulse condition type result of the user. According to the scheme provided by the embodiment of the invention, the user can conveniently, quickly and accurately know the pulse condition and the physique state of the user, and the use convenience is improved.

This application discloses a method, apparatus, electronic device, and storage medium for recognizing facial expression images, relating to the field of image recognition technology. It includes: determining the original vector of the expression image based on its pixel values; performing principal component analysis on the original vector to obtain the target vector of the expression image; inputting the target vector into a feature extraction network to obtain feature information of the expression image; encoding the feature information using pulse frequency based on a Poisson distribution to obtain a pulse sequence of the expression image; and inputting the pulse sequence into an expression recognition model to obtain the recognition result of the expression image. The expression recognition model is a multilayer spiking neural network, where the spiking neuron model is an improvement based on the leaky integral discharge neuron (LIF) model. This application's technical solution offers better interpretability and flexibility, significantly reducing network energy consumption while improving computational power, making it suitable for more intelligent small robots such as customer service robots.

By means of a liquid guide located on the body, which is situated inside a cylindrical body and has guide blades (7–8) at one end, it is used to measure the flow of liquid in only one direction. The liquid inlet guides (4) inside the body (9) direct the flow towards the impeller (3), and since the form of the guide blades (7–8) on the outlet bracket (5) of the impeller (3) is the same as the form of the impeller (3), in reverse flow the blades do not interact between each other to create a rotation. At the same time, in said invention, since the blade (8) angles of the outlet flow guide are in the same direction as the blade angles of the impeller (3), in the event of reverse flow of the liquid inside the device, the guide remains stationary, thereby not generating a signal during reverse flow. The working principle of said invention is based on counting the signal pulses generated depending on the amount of liquid passing through the sensor. The counted pulses are converted into a flow rate in litres per minute with the aid of a predetermined flow formula. This formula is determined depending on the design of the sensor and may vary according to the sensitivity of the sensor. An increase in the flow rate causes a proportional increase in the pulse frequency. The sensor measures this frequency to determine the flow rate and accordingly calculates the amount of liquid passing per unit time in the most accurate way. In said invention, the absence of an additional magnet in the impeller (3) and the difference from traditional flow sensors existing in the state of the art due to the magnetic field property originating from the impeller (3) itself is characterised. In said invention, by leaving only a very small gap between the inlet mouth of the bearing (1) on the inlet side of the impeller (3) and the impeller (3) itself, the entry of particles carried by the fluid into the bearing (1) region is prevented. At the same time, said invention is related to obtaining the same measurements in different types of installation diameters, and, as long as the inlet installation cross-sectional area is not smaller than the cross-sectional area of the flow meter, measurement with the same sensitivity is obtained from the flow meter.

The application discloses a kind of based on dynamic pulse discrimination steam turbine speed anti-interference measurement method, it is related to industrial automation control field, the method includes: S1: by the speed sensor of installation in steam turbine rotor speed measuring gear flank alternately changed and generated sine wave signal of tooth valley conversion into digital pulse signal by conditioning circuit;S2: calculate the effective pulse frequency f of this sampling time, to calculate effective pulse cut-off period T;S3: for subsequent new pulse, calculate the time interval Δt between it and the last pulse being judged as effective;If Δt≥T, then determine that the new pulse is effective pulse;If Δt < T, then determine that the new pulse is interference pulse and is rejected;S4: update effective pulse frequency f, calculate the real-time speed of steam turbine, calculate the real-time speed of steam turbine solves the defect that present art relies on hardware filtering and is difficult to eliminate singular interference pulse completely, leading to unreliable speed measurement.

A battery management system includes a first battery cell controller, a second battery cell controller each monitoring a plurality of battery cells, and an electrically isolated transmission line providing a point-to-point signal transmission path between the first battery cell controller and the second battery cell controller. At least one of the first battery cell controller or the second battery cell controller includes at least one encoding / decoding circuit that encodes data in accordance with a multi-level encoding technique for transmission along the signal transmission path as a serial data stream, including modulating the serial data stream on at least three discrete signal levels at a predetermined and fixed data pulse frequency, encoding a plurality of data nibbles of the serial data stream into a data packet, the data packet including a plurality of symbols structured and arranged to have at least four consecutive chips per symbol, wherein the at least four consecutive chips per symbol of the data packet include a DC balance line code in each of the symbols.

A system is provided for use with a subject suffering from cancer that includes one or more primary or metastatic solid tumors. The system includes nanoparticles including a magnetic metallic core and a phase-change material (PCM) that surrounds the magnetic metallic core and is configured to absorb latent heat of fusion by undergoing a phase change that occurs at a phase-change temperature of 42-80 degrees C. A radiofrequency (RF) transmitter is configured to transmit energy, in a pulse train alternating between high power and low power at a pulse frequency of 1 Hz-5 Hz, to at least a portion of the subject's body, such so that the nanoparticles are heated to the phase-change temperature of the PCM, and store energy from the pulse train in the PCM as latent heat of fusion. Other embodiments are also described.

This invention provides a method for preparing modified graphene oxide for textile finishing agents, belonging to the field of graphene new material technology. The method includes: connecting a graphene oxide film to a cathode electrode; using an alkaline electrochemical solution obtained by mixing a cationic modifier and a conductivity enhancer as the electrolyte; subjecting the mixture to pulsed electrochemical treatment; and obtaining the modified graphene oxide after post-treatment. Compared to traditional long-duration, high-temperature, and high-pressure reactions, this invention employs a DC pulsed electrochemical treatment process. By adjusting parameters such as current density, on / off time, and pulse frequency, the stability of the cationic grafting in the product is effectively improved, while simultaneously improving surface quality, without oxidizing the graphene and destroying its original basic structure, thus increasing the efficiency of the electrochemical treatment.

A multiple-pulses-in-air (MPiA) laser scanning system configured for measuring the time-of-flight of laser pulses, wherein the computing unit is configured for triggering the transmitter to transmit the send pulses with a varying pulse frequency, wherein the transmitter is configured to have a dead mode, wherein in the dead mode an increase in pulse frequency is effected, wherein in the course of increasing the pulse frequency, a reduction in pulse energy per individual send pulse of the send pulses is provided such that the pulse energy of the resulting return pulses is reduced such that it is below a detection threshold, and a measurement mode, wherein in the measurement mode a reduction in pulse frequency compared to the dead mode is effected.

The invention relates to the technical field of geographic surveying and mapping, and discloses an unmanned aerial vehicle-mounted laser radar geographic surveying and mapping data acquisition system and method, and the system comprises an unmanned aerial vehicle platform, a laser radar sensor, a position attitude measurement unit and an airborne calculation unit. The airborne computing unit shunts the original point cloud into a look-ahead point set and a surveying and mapping point set through a view field partitioning module; the geometric prediction module solves a predicted incident angle of the surface micro-element by using the look-ahead point set in combination with the pose; the instruction generation module reversely calculates acquisition parameters including the pulse frequency and the flight ground speed according to the parameters, and generates space anchor point coordinates; the space synchronization execution module issues parameters when the unmanned aerial vehicle arrives at the anchor point; and the real-time feedback verification module triggers override interruption according to the actual density of the surveying and mapping point set. According to the method, adaptive parameter adjustment is realized through prospective perception and closed-loop feedback, the problem of non-uniform distribution of point clouds of complex terrains is solved, and the integrity and efficiency of geographic surveying and mapping data acquisition of the unmanned aerial vehicle-mounted laser radar are improved.

This application provides a power supply circuit, a control method for the power supply circuit, and an electronic device. The power supply circuit of this application includes: an inverter unit, a resonant unit, a transformer unit, a rectifier unit, and a control unit. The inverter unit includes an inverter control switch group, and the rectifier unit includes a delay control switch group and a rectifier control switch group. In response to a preset signal, the control unit determines the pulse width of the delay control signal and the pulse frequency of the inverter control signal based on the output voltage of the power supply circuit. In response to the pulse frequency of the inverter control signal being less than the resonant frequency of the resonant unit, the control unit outputs an inverter control signal to the inverter control switch group and a rectifier control signal to the rectifier control switch group to control the resonant unit to operate in a first operating state. In response to the delay signal, the control unit outputs a delay control signal to the delay control switch group to control the resonant unit to operate in a second operating state, thereby extending the power-down retention time.

The embodiment of the invention provides a window cleaning robot speed detection method and a related device, and relates to the technical field of cleaning. The method comprises: acquiring a pulse signal of a detection sensor; the detection sensor comprises a single-phase Hall sensor and / or a single-phase photoelectric sensor; determining a pulse number increment in unit time according to the pulse signal; and determining the speed of the window-cleaning robot according to the pulse number increment and a preset reduction ratio of a motor of the window-cleaning robot. According to the scheme, the pulse signal output by the single-phase Hall sensor and / or the single-phase photoelectric sensor is utilized, and the pulse frequency calculation of the time window is combined, so that the high-precision and high-reliability detection of the speed of the window-cleaning robot is realized. And the cost of the window cleaning robot and the complexity of the system are effectively reduced.

The invention discloses a pulse type infrared low-temperature drying device and method, and relates to the technical field of radiation drying, and the pulse type infrared low-temperature drying device and method comprises the following steps: S1, heating a drying cavity to a set temperature, starting a dehumidification function, and stabilizing for 3-5 minutes; s2, the materials are conveyed into a drying cavity, the materials are recognized, and material attributes are obtained; s3, initial parameters are set according to the recognized material matching material database, pulse type infrared radiation is started, and the initial parameters comprise the infrared wavelength, the pulse duty ratio, the radiation power and the pulse frequency; s4, monitoring the moisture content of the material, the surface temperature of the material and the relative humidity in the drying cavity in real time as linkage input signals; according to the method, wavelength self-adaptive adjustment, pulse parameter compensation, directional diversion and energy consumption feedback are integrated and coordinated for the first time, the problem of balancing penetrability, energy consumption, material activity and safety in an existing radiation drying technology is fundamentally solved, and the technical bottleneck of single parameter optimization is broken through.

The application discloses a galvanized steel pipe inner blowing process automatic control system and method, belongs to the intelligent control technical field of hot galvanizing process, acquires steel pipe structure parameters and matches historical process models, and outputs initial temperature and pressure values; the temperature change rate of the steel pipe inner cavity is collected, and a thermal state vector is established; the current optimal inner blowing pressure P(t) and pulse frequency f(t) are calculated by combining the fuzzy controller with the initial parameters T0 and P0 and the ΔT / Δt; the PWM driving signal is generated to control the electromagnetic valve and the fan operation, and the blowing rhythm regulation is realized; the pressure falling curve after each blowing is collected, the falling rate dP / dt is calculated, and the zinc liquid detachment efficiency is evaluated; when the deviation exceeds the threshold value, the fuzzy rule base is automatically corrected, the self-learning and optimization of the control parameters are realized; the method improves the inner blowing precision and consistency, has strong adaptability, and can be widely applied to the intelligent manufacturing field of hot galvanized steel pipes.

This invention belongs to the technical field of fluorescence lifetime measurement, and discloses a fluorescence lifetime measurement method and system based on time-gated fluorescence imaging. The method includes: acquiring multiple frames of fluorescence images of a sample, wherein the frame rate is greater than the pulse frequency of the pulse beam, and the frame rate and pulse frequency are not integer multiples of each other; the phase difference between two fluorescence images is a delay difference between the sampling delay of the two fluorescence images and their respective reference times; the reference time of each fluorescence image is the on-time of the pulse beam corresponding to its acquisition; calculating the average gray level of the fluorescence images; arranging the average gray levels within multiple pulse beam periods according to the sampling delay to obtain a time-gated sequence of average gray level variation with sampling delay; and obtaining the fluorescence lifetime of the sample by data fitting based on the time-gated sequence. Based on this method, the complexity and cost of detection can be reduced, and the limitations on application scenarios can be lessened.

This invention provides a leakage detection method and system, relating to the field of water supply network monitoring and leakage identification technology. It collects pulse frequency signals using Hall effect turbine flow sensors connected in series with the main and branch waterways, converting them into real-time water flow velocity and instantaneous flow rate data. This generates status flags for each waterway and accumulates continuous water usage time, constructing a velocity-location mapping set. This mapping set is then mapped to an irregular curved surface in a three-dimensional coordinate system. Finite element meshing and numerical integration are used to calculate the body center offset, yielding a velocity field offset coefficient. Combined with day / night shift time periods, corresponding basic threshold durations are retrieved, and a dynamic threshold duration is obtained after offset coefficient correction. This is compared with the continuous water usage time to determine abnormal water usage. A push notification containing abnormal location information is sent to a mobile device, triggering an audible and visual alarm. This invention achieves joint analysis of water usage status across the entire water supply network and adaptive leakage detection, effectively reducing the risk of false alarms and missed alarms.