49 results about "Pulse injection" patented technology

The invention belongs to the technical field of coal bed gas exploitation and carbon dioxide geological storage, and relates to a coal bed carbon dioxide injectability evolution whole process simulation device and method, and the device comprises a true triaxial stress loading system, a temperature control system, a multi-mode gas injection system, a monitoring system, and a data processing system. The deep stratum stress state and the stratum temperature field are simulated, constant-pressure and constant-current mode carbon dioxide is injected into the true triaxial stress loading system to carry out groutability attenuation and recovery simulation, and nitrogen and pulse mode injection is switched to carry out temperature change regulation and control, phase change regulation and control and frequency change regulation and control so as to simulate groutability improvement. According to the method, a whole-process evolution mechanism of attenuation-recovery-improvement of carbon dioxide groutability is realized, meanwhile, data acquisition and permeability and stress calculation are performed through a monitoring system and a data processing system, and rapid conversion from original data to core parameters is realized; and accurate experimental data support is provided for on-site injection parameter optimization and regulation and control technology research and development.

A pumped storage unit main transformer winding inter-turn short circuit fault diagnosis positioning method and system, comprising: pulse injection is carried out on the main transformer of the pumped storage unit in the shutdown state, and the voltage response waveform is obtained; the characteristic waveform is calculated, the different connection modes of the pumped storage unit main transformer winding are combined, whether the pumped storage unit main transformer winding exists fault and the fault phase are judged; the VMD decomposition optimization model and the NTEO wave head extraction optimization model with optimal parameters are constructed, and the instantaneous energy spectrum is obtained based on the model and any characteristic phase containing characteristic phase; the fault positioning formula is constructed based on the instantaneous energy spectrum, the fault positioning formula corresponding to the relationship between the characteristic phase and the fault phase in the voltage response waveform is selected according to the relationship between the characteristic phase and the fault phase, and the positioning of the fault coil is obtained. The method has high reliability, high fault diagnosis accuracy and small positioning result error, and can meet the needs of pumped storage unit main transformer winding inter-turn short circuit fault diagnosis and positioning in engineering.

The application provides a vertical-axis phase-synchronous pulse injection control method for a hybrid excitation variable reluctance motor, and belongs to the technical field of motor control. The method comprises the following steps: S1, configuring a hybrid excitation variable reluctance motor, which comprises two sub-phase components, and each sub-phase component is powered by a three-phase four-bridge-arm inverter; S2, constructing a self-induction model under pulse detection signal excitation based on the structure of the hybrid excitation variable reluctance motor; S3, sequentially injecting detection pulse voltages into each phase by adopting the vertical-axis phase-synchronous pulse injection method, obtaining the size of the inductance value of each phase, thereby judging the current sector where the rotor is located, and substituting the bias electric angle into the self-induction model to calculate the bias electric angle; and S4, calculating the electric angle of the rotor magnetic field at the current moment according to the bias electric angle.

The invention relates to a pulse injection circuit, a pulse injection method, an audio power amplifier system and electronic equipment. The pulse injection circuit is applied to the audio power amplifier circuit, and the audio power amplifier circuit comprises an input circuit used for inputting a pulse width modulation signal. The pulse injection circuit comprises a detection circuit and a pulse generation processing circuit. Wherein the detection circuit is used for being connected with the input circuit so as to detect a pulse width modulation signal in real time and generate an injection pulse trigger enable signal in response to the pulse width modulation signal. The pulse generation processing circuit is connected with the detection circuit and the input circuit and is used for responding to the injection pulse trigger enable signal to generate a pulse overturning enable signal; performing logic processing on the pulse flip enable signal and the pulse width modulation signal to form a pulse injection signal; and injecting the pulse injection signal into an input circuit to enable the pulse width modulation signal to generate level flipping. The invention can automatically inject the pulse in response to the demand.

Power-Based Pulse Injection Control for SR Self-Sensing Power-based self-sensing of rotor position of an SR motor at medium to high speed and low torque is achieved in an SR motor control system by comparing the motor power with an injected maximum power. In response to the motor power being less than the injected maximum power, a position current pulse is injected into the stator poles. The actual stator current generated by the position current pulse is compared with an estimated stator current, and if the actual stator current is not equal to the estimated stator current, the estimated rotor position stored in memory is updated with a new estimated rotor position.

The utility model relates to a device for realizing intelligent dust removal based on an industrial environment dust removal system. The device comprises a compressed air storage tank, a compressed air conveying pipe and a plurality of pulse blowing valves, and a plurality of filter bags. The utility model relates to a leakage detection device for a compressed air storage tank, which comprises a compressed air storage tank, a compressed air delivery pipe, pulse blowing valves, a particle concentration monitor, a leakage detection signal transmission line and an electric lifting valve, the outlet end of the compressed air storage tank is connected with the inlet end of the compressed air delivery pipe, the outlet end of the compressed air delivery pipe is connected with the inlet end of each pulse blowing valve, and the outlet ends of the pulse blowing valves correspond to filter bags. The output end of the particulate matter concentration monitor is connected with a leak detection signal transmission line, and the leak detection signal transmission line is connected with the electric lift valve. According to the device for realizing intelligent dust removal based on the industrial environment dust removal system, the pulse injection pressure is dynamically adjusted through the pressure difference change of dust filtered by the filter bag, so that the consumption of compressed air is saved, and the service life of the filter bag is prolonged. And the leakage position of the filter bag in the environmental dust removal system is accurately positioned through the concentration change of the fixed pulse injection time interval.

The invention provides a DPF active regeneration control method, system and equipment based on urea injection time sequence optimization and a medium, and belongs to the technical field of automobile control. The method comprises the steps that S1, whether DPF active regeneration needs to be started or not is judged, and when it is judged that DPF active regeneration needs to be started, the exhaust temperature is increased to the target regeneration temperature range in a fuel oil post-injection mode; s2, after the exhaust temperature is increased to the target regeneration temperature range, a urea injection mode is controlled to be switched from a preset continuous injection mode to a preset intermittent pulse injection mode; and S3, when the active regeneration of the DPF is finished and the exhaust temperature is reduced to be below a normal temperature threshold value, the urea injection mode is switched back to a preset continuous injection mode from a preset intermittent pulse injection mode. The problem of urea crystallization under a high-temperature regeneration condition is effectively avoided.

The invention discloses a cleanliness detection method and device suitable for a long-distance refrigeration pipeline, and relates to the related technical field of cleanliness detection.The method comprises the steps that the injection gas type and injection pulse signals of a to-be-detected long-distance pipeline are determined; a liquid nitrogen vaporization device is connected, a pulse injection valve is controlled by injecting pulse signals to inject gas into an inlet, an infrared thermal imaging array is adopted to collect the temperature of the outer surface, and real-time response data of the temperature of the outer surface are output; constructing a heat transfer abnormal area identification model through a pipeline three-dimensional transient heat transfer equation, and marking an abnormal area to obtain a heat transfer abnormal area; and analyzing the heat transfer abnormity response data of the heat transfer abnormity area, and generating a cleanliness detection result. The technical problems that in the prior art, the cleanliness detection efficiency of a long-distance refrigeration pipeline is low, real-time dynamic monitoring cannot be achieved, and a local pollution area is difficult to accurately recognize are solved, and the technical effects that the heat transfer abnormal area is accurately positioned, and high-efficiency and high-precision cleanliness detection is conducted on the pipeline are achieved.

The present application relates to the field of medical apparatus and anesthesia control technology, in particular to a kind of anesthetic gas output control system for anesthesia machine, including parameter configuration interface, fluid state perception module, wave front quality phase state solution engine and phase synchronous pulse injection module;Collect flow rate, pressure and target gas actual concentration, discretization generates periodic fluid phase parameters containing fluid acceleration and volume integral, combined with target gas set concentration, concentration residual and aerodynamic impedance matrix solve the injection quality required by target period, and when fluid acceleration is higher than threshold, asymmetric pulse width modulation waveform is output in wave front injection window, drives target actuator to inject target gas, to realize actual concentration to set concentration approximation, improve concentration response speed under low flow condition.

The invention relates to the technical field of driver control, and discloses a driver rotor operation fault identification method and system, and the method comprises the steps: obtaining the salient pole rate of a motor, comparing the salient pole rate with a preset threshold range, executing a high-frequency pulse injection fault identification process if the salient pole rate meets the requirement, or employing a conventional starting method; high-frequency pulses are injected into the motor in multiple space voltage vector directions, current response is collected, and pulse injection parameters are dynamically adjusted until the current response is stable; and identifying an operation fault based on the stabilized current response, and judging the position of the rotor and controlling the soft start of the driver when no fault exists. The method adapts to different motor characteristics, improves fault identification precision and rotor positioning accuracy, guarantees stable and safe starting of the motor, and is suitable for motor driving scenes such as a variable frequency air conditioner fan.

The application relates to the technical field of power distribution network fault detection, in particular to a low-voltage power distribution network fault detection method and device, which comprises the following steps: adopting a pulse signal injection method, injecting a pulse signal into a low-voltage power distribution network at different pulse widths each time, receiving the reflected signal, and recording the response signal after each pulse injection; performing modal decomposition on the response signal, obtaining a plurality of modal components, and calculating the relative difference of each modal component after each pulse injection; obtaining the modal component corresponding to the fault point; calculating the first interference value and the second interference value after each pulse injection; determining the pulse width adjustment amount and the pulse width of the next pulse injection, selecting the optimal response signal by continuously injecting pulses, and positioning a single-phase ground fault in the low-voltage power distribution network. The application improves the dynamic adaptability of the arc nonlinearity characteristics and the network topology in the power distribution network by adjusting the pulse width in real time, and improves the accuracy of the pulse signal injection method in fault detection.

The embodiment of the invention provides a down lead fault detection device and method based on pulse injection and time-frequency matching, and the device comprises a signal clamp which is used for the injection of an electromagnetic pulse signal and the conduction of a full-time reflection signal; the power switch is used for controlling on-off of power supply of the whole machine; the battery module is used for supplying power; the case is used for structural support, physical protection and environmental protection; the electronics module is used for injecting a specific electromagnetic pulse signal into the down lead and collecting an incident signal and a full-time reflection signal of the down lead; carrying out time-frequency conjoint analysis, and extracting the characteristics of the signal in a time-frequency-amplitude three-dimensional space; dividing the all-time reflection signal into continuous time-frequency blocks, and executing correlation matching in a time-frequency-amplitude three-dimensional space; calculating the fault position of the downlead according to the matching result; and the man-machine interaction and display module is used for displaying state information and result information of down lead fault detection in real time.

The invention discloses an intelligent fault diagnosis and early warning system for a silicon carbide transistor welding power supply, relates to the technical field of fault diagnosis, and aims to solve the technical problem that thermal runaway early warning lags due to the fact that traditional diagnosis only passively protects transient faults and cannot associate defect levels with bipolar degradation and prejudgment progressive failure. Comprising a data acquisition module which comprises a working condition gap pulse injection unit and a multi-physical-quantity synchronous sampling unit, and the working condition gap pulse injection unit injects amplitude-adaptive reverse test pulses in a welding power source base value pulse or no-load state; the multi-physical-quantity synchronous sampling unit synchronously collects five kinds of characteristic parameters including reverse recovery charge, reverse recovery time, secondary breakdown current, defect activation voltage and junction temperature, the bipolar degradation three-level state is accurately recognized through a coupling model and an exclusive collection and fusion algorithm, thermal runaway is warned in advance, device damage and welding interruption are avoided, and the reliability of the device is improved. The power supply complex working condition reliability is improved.

The invention discloses an electric mower. The electric mower comprises a brushless motor; in the starting stage of the brushless motor, the controller is configured to obtain an initial sector in a plurality of motor sector positions where a rotor is located based on a pulse injection method; and acquiring the rotor position of the rotor in the initial sector based on a high-frequency signal injection method so as to control the brushless motor to start, the high-frequency signal comprises a periodic signal, and the positive half cycle of the periodic signal and the negative half cycle of the signal are different in amplitude. The position detection of the rotor of the electric mower is more accurate.

The invention discloses a hydraulic fracturing simulation method based on variable yield superposition and filtration coupling, and belongs to the technical field of hydraulic fracturing fracture numerical simulation in petroleum, natural gas and geothermal exploitation, the method comprises the following steps: S1, parameter and hypothesis configuration; s2, deriving crack core parameters; s3, performing time step and filtration coupling calculation; and S4, performing multi-field coupling solution and parameter updating. According to the hydraulic fracturing simulation method based on variable yield superposition and filtration coupling, dynamic tight coupling of filtration and fracture geometric evolution is achieved, the prediction error of the fracture length and the accumulated filtration volume under the non-constant working condition is reduced, the performance is superior to that of a traditional model, and the method is suitable for popularization and application. And the method can accurately adapt to pulse type, high-low pressure alternate injection and other complex working conditions, and fills the engineering application blank of a traditional model under the complex working conditions.

The application discloses a portable hydrogen fuel cell safety hydrogen supply and pressure stabilizing system and belongs to the technical field of hydrogen fuel cells. The system comprises a pulse injection valve and an injection pressure stabilizing assembly arranged along a flow direction. The assembly comprises a central injection pipe and a peripheral pressure stabilizing cavity sleeved outside the central injection pipe, an annular cavity with fixed volume parameters is formed between the central injection pipe and the peripheral pressure stabilizing cavity, and the mixed pressure expansion section pipe wall is provided with a flow guide hole penetrating into the cavity. The system further comprises a sensor module and a control unit. The control unit performs boundary constraint calculation based on the ideal gas state equation and the pressure limit of the electric pile, determines the safety threshold of the maximum opening duration of the pulse valve in a single time, and combines the load working condition to distinguish the low-load pulse and the high-load straight-through working condition, thereby realizing selective boundary constraint of the pulse injection valve driving signal. Through the cooperation of the physical structure and the electronic constraint depth, the impact risk of excessive hydrogen injection is eliminated, the continuous hydrogen supply and the stable pressure in the full power range are ensured, and the system operation safety and reliability are improved.

This invention belongs to the field of power electronics and power management technology. It discloses a system for optimizing the timing and monitoring the status of uninterrupted power replenishment of a dual-core fusion maintenance power supply. The system includes: a status perception and prediction module, used to compare electrical feature vectors with a pre-built load feature curve library and output load status description information; a power feedforward allocation module, used to determine the real-time demand status of the load and identify the target bus voltage and feedforward compensation current; an intermittent pulse power replenishment module, used to call a pre-established anti-phase pulse injection strategy based on the judgment result to control the bus to provide pulse power replenishment to the slave unit, while simultaneously determining whether a reverse electromotive force impact occurs and generating a reverse energy absorption switching signal; and a braking energy recovery module, used to respond to the reverse energy absorption switching signal, establish a low-impedance energy recovery channel, and recover the braking energy fed back from the load to the bus, thereby improving the overall energy efficiency ratio.

The application provides a super-combustion ramjet engine spanwise pulse injection device, which comprises a spanwise injection cylinder and at least two pulse injection assemblies in parallel and communicated with the spanwise injection cylinder, the pulse injection assembly comprises a first valve body, a second valve body, a movable valve core arranged at an outlet end of the second valve body and a nozzle seat which are sequentially arranged along a fuel flow direction; at least two buffer cavities which are symmetrical along a second valve body axis are arranged at a connection position of a third valve seat and a second valve seat, a buffer elastic member is arranged in the buffer cavities, and a pressure relief pipeline which is communicated with the second cavities is arranged at one end of the buffer spring close to the buffer cavities. Advantageous effects: through the design of four buffer cavities, a pressure relief pipeline and a buffer elastic member, when the pressure in the pipeline changes, the buffer elastic member is compressed or rebounds, the water hammer effect is effectively reduced, the rate of fuel entering the second cavities from the pipeline is accelerated, the injection rate is further accelerated, the pulse lag phenomenon is reduced, and the pulse frequency is improved.

Operating an engine includes energizing an electrical actuator for a valve in a fuel injector according to a waveform alternating a plurality of on-times with a plurality of dwell times, and outputting a pulsed injection of a gaseous hydrogen fuel from the fuel injector entraining air between pulses of the gaseous hydrogen fuel. Entrainment breaks are produced between the plurality of pulses in a spray cone of the pulsed injection. The gaseous hydrogen fuel and air experience enhanced in-cylinder mixing based upon the air entrainment. Related apparatus is also disclosed.

This invention relates to the field of multi-branch floating ground power supply technology, and discloses a pulse-injection method for dual-parameter detection and estimation of residual current and insulation resistance. The method includes: injecting a symmetrical positive and negative pulse with zero net charge between the power supply midpoint and the grounding terminal; simultaneously acquiring the differential current and midpoint voltage of each branch; symmetrically decomposing the pulses to separate the steady-state leakage current component and the transient return current component; using the time integral of the total return current component to invert the capacitance time constant, insulation time constant, and capacitance weight; then extracting the insulation charge to obtain the global insulation resistance; using the insulation time constant to weight the transient return current component of each branch to obtain the branch leakage current ratio, mapping the output branch insulation resistance and residual current; finally, continuously fusing steady-state and transient data by generating dynamic coefficients, and adaptively updating the injection duration for the next round. This invention eliminates ring network shunt interference and achieves accurate positioning and anti-interference assessment of the dual parameters.

The invention relates to a sensor fault detection method and device, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring real-time humidity and real-time temperature of a transformer defect simulation device, a transformer bushing defect sample and a current environment; calculating the sample amplitude of the to-be-tested sensor in the current environment; the method comprises the following steps: connecting a transformer defect simulation device with a transformer bushing defect sample, and under the condition that a discharge signal injected by a standard calibration pulse exists at a defect position of the transformer bushing defect sample, obtaining an actually measured amplitude detected by a sensor to be detected at a position of each preset angle; based on the number of the preset angles, weighted averaging is carried out on the actually measured amplitude, and the average amplitude of the sensor to be measured is obtained through calculation; and when the difference between the average amplitude and the sample amplitude is greater than a preset degree, determining that the to-be-detected sensor has a fault. The method can improve the accuracy of the fault detection result of the sensor.

The present application relates to the field of building material detection test equipment, in particular to a demolding device for concrete test blocks and a method thereof; comprising micro-tension application, gas-liquid pulse injection, frequency spectrum feature analysis, dynamic speed-up demolding and hydraulic damping cavity buffering module; the system combines back pressure signal to extract high and low frequency amplitude through fast Fourier transform, calculates high frequency proportion to evaluate the interface equivalent stiffness of test block and mold in real time; the core is to dynamically adjust the gas-liquid pulse parameters and the smooth speed-up curve of the servo motor according to the stiffness evaluation result, and to generate reverse shear damping force in the internal hydraulic cavity for buffering at the moment of test block separation; the present application breaks the limitation of traditional stateless feedback mechanical pulling force, uses gas-liquid oscillation and frequency spectrum feedback self-adaptive adjustment to solve the problem of sudden change of pulling force, avoids local stress concentration, effectively prevents early age test block corner tearing and significantly improves the integrity and safety of demolding.

This application provides a multi-source coordinated black-start control method for islanded operation of a microgrid in a park, relating to the field of power system automation control technology. The method includes: generating fingerprints for heterogeneous power sources using a dynamic characteristic tag library and constructing a decoupling map to delineate control channels with different response speeds. Based on the system voltage recovery process, power sources in different channels are controlled in stages to intervene in specific modes: in the extremely low voltage stage, the fastest-response power source establishes voltage through discrete pulse injection; in the medium voltage stage, medium / slow-speed power sources intervene as controlled current sources to form a composite power source; and in the high voltage stage, nonlinear power sources are activated and their control algorithms are reconstructed. This method achieves dynamic decoupling at multiple physical scales and sequential energy flow reconstruction, effectively solving the problem of multi-source coordinated instability under extreme low voltage conditions.

The application provides a variable frequency pulse injection device, which comprises a cylinder body with a through hole in the middle, an oil inlet pipeline and an oil outlet pipeline are arranged in the cylinder body, the inner diameter of the oil inlet pipeline is larger than that of the oil outlet pipeline, a nozzle assembly is arranged at the outlet of the oil outlet pipeline, the cylinder body further comprises a rotating shaft cavity which is perpendicular to the axis of the cylinder body, a rotating shaft which is rotatably connected to the cylinder body through a ball bearing is arranged in the rotating shaft cavity, the rotating shaft comprises a long shaft section which extends outward from the cylinder body and a short shaft section which is located in the cylinder body, two first elliptical cavity blocks and second elliptical cavity blocks which are consistent in shape and left-right symmetrical are arranged in the middle of the rotating shaft, and the first elliptical cavity blocks and the second elliptical cavity blocks are combined to form an elliptical cavity after installation. Advantageous effects: the combination of the specially designed rotating shaft and the cylinder body is used to control the change of the rotating speed of the rotating shaft and the change of the pulse injection frequency, the characteristics of the servo motor, such as accurate speed control and fast response speed, are utilized, and the response speed of the frequency change of the injection device is improved.

This invention discloses an experimental apparatus and method for enhancing oil recovery through high-frequency pulsed CO2 injection, relating to the field of oil and gas extraction technology. The apparatus includes a high-frequency pulsed injection module, a pulse waveform adjustment module, and a nuclear magnetic resonance (NMR) module. The high-frequency pulsed injection module comprises a first pneumatic valve, a second pneumatic valve, and a pneumatic valve controller. The first pneumatic valve is connected to a high-pressure CO2 source, and the second pneumatic valve is connected to a low-pressure CO2 source. The pneumatic valve controller controls the first and second pneumatic valves to interlock and instantaneously switch according to pulse parameters, generating high-frequency pressure pulses. The pulse waveform adjustment module adjusts the waveform of the high-frequency pressure pulses. The NMR module, based on the adjusted high-frequency pressure pulses, alternately injects high-pressure and low-pressure CO2 into the experimental core, collects NMR data of the experimental core before and after pulsed injection, and generates an adjustment signal to adjust the pulse parameters. This invention can achieve instantaneous pressure changes and enhance the pulse effect.

The invention discloses a multi-stage pulse peristaltic high-pressure precise contrast agent injection system, and relates to the technical field of contrast agent injection. The device comprises a machine body, a medicine bottle fixing frame, a multi-medicine-bottle supporting hopper, an elastic medicine liquid conveying pipe, a four-way infusion pipe, a flow control valve, a rolling wheel driving disc, a plurality of rolling wheels, a pulse control motor, an ultrasonic flow sensor and a core controller, wherein the rolling wheel driving disc and the rolling wheels are arranged in an annular wriggling groove cavity. According to the system, multi-liquid-medicine proportion matching is achieved through the peristaltic pump principle, flow speed signals are collected in real time through the ultrasonic flow sensor, and harmonic fingerprint decomposition, phase locking prediction and self-adaptive rotating speed mapping are conducted through the core controller; the control pulse controls the motor to generate a multi-stage pulse injection mode in which a main pulse follows 2-4 secondary pulses with gradually decreased amplitudes. The mode can quickly establish peak contrast, promote uniform mixing of a contrast agent and blood, realize gradual decline wake flow control, reduce the dosage of the contrast agent and improve the image quality.

The application provides a switch reluctance motor rotor position sensorless estimation method based on Kalman fusion, the method is obtained by fusing a pulse injection-based method and a saturation-non-saturation inductance transformation-based method, and optimal fusion coefficients are determined, so that the error of the fused result is minimum, and the position estimation error can be reduced while the simple calculation and measurement steps are retained. The application can significantly improve the rotor position estimation precision, and compared with a traditional position sensorless control method, the application does not need additional measurement hardware and complex data tables, only needs a small amount of coefficient storage space and simple formula calculation, and is highly applicable.

According to the advanced stepped furnace pulse injection control system, the sensor unit, the control unit, the client system, the data processing unit, the pulse generator and the injection device are integrated in the system, and automatic and accurate control over the injection process in the stepped furnace is achieved. The system detects key parameters such as flow, pressure, temperature and gas density in the furnace in real time through the sensor unit and sends data to the control unit and the data processing unit. And the data processing unit is combined with an algorithm function predefined by a user to calculate optimized blowing decision data, and then the optimized blowing decision data is sent to the control unit. The control unit converts the decision data into electric control signals, drives the pulse generator to generate accurate pulse signals, and further controls the injection device to perform injection operation. The system also shows the advantages of flexibility, accuracy, safety, energy conservation, environmental protection and the like.

The present application relates to pulse injection electromagnetic valve and partial pressure gas bag working condition detection method, including the following steps: 1) compressed air source pressure regulation detection, 2) pulse injection partial pressure gas bag leakage detection, 3) pulse injection electromagnetic valve leakage detection, 4) pulse injection partial pressure gas bag other position manual detection, the pulse injection electromagnetic valve and partial pressure gas bag working condition detection method, respectively, detect the compressed air source pressure value P0 and the pressure value (P1-P X ) of pulse injection partial pressure gas bag, and compare to determine whether there is pulse injection partial pressure gas bag leakage, then detect the negative pressure value (△P1-△P N ) of each pulse injection pipe connected detection branch through the differential pressure transmitter on the main pipe, to determine whether the pulse injection electromagnetic valve connected to the pulse injection partial pressure gas bag is leaking, to detect the leakage of pulse injection electromagnetic valve and pulse injection partial pressure gas bag in real time, to solve the leakage problem in time, and to ensure the normal and stable operation of the pulse injection system.