31 results about "Abnormal pressure" patented technology

The invention discloses a composite fault diagnosis method for motor overload and pressure abnormity of a wind power water cooling system. The method comprises the following steps: S1, data acquisition; the collected original signal data is preprocessed; s2, constructing a lightweight system performance model, and calculating a pressure residual error; s3, extracting time domain and frequency domain features from the original signal data and the residual signals to form feature vectors; s4, performing fault diagnosis based on a machine learning model, and inputting the feature vector into a trained model; the model outputs a diagnosis result and gives a fault confidence coefficient; and S5, outputting a result, and performing early warning. Predictive maintenance is achieved, early warning can be given out at the early stage of a fault when shutdown or secondary damage is not caused, a maintenance plan can be made in advance, passive first-aid repair is changed into active planning, the non-planned shutdown time is shortened, and the availability of a wind field is improved; the unnecessary on-site inspection frequency is reduced, the excessive dependence on the qualification operation and maintenance experts is reduced, and the troubleshooting time is shortened.

The invention belongs to the technical field of data processing, and particularly relates to an intelligent analysis method and system for valve performance test data, and the method comprises the steps: constructing a dynamic sensitivity factor capable of reflecting the system stability through analyzing the change rate of a flow time sequence and the fluctuation of a current time sequence, and generating a fatigue factor in combination with a pressure range; further, an abnormal pressure peak value caused by the water hammer effect is identified and quantified, and a fatigue factor is corrected to obtain a degradation acceleration factor which can better reflect real physical wear; finally, the composite dynamic features and the traditional static features are jointly input into a GBDT model for training, so that early failure symptoms can be captured, and the accuracy and reliability of prediction of the remaining service life of the valve are improved.

The invention discloses a water pump flow control method and system, and the method comprises the steps: S1, a control system is initialized, a global impedance set is obtained through the control system, and the global impedance set comprises but is not limited to the impedance coefficients Zi, the initial pressure Qs and the descent slope K of all branches; s2, based on the global impedance set, the pulse switch time sequences of all branches are coordinated through a pulse synchronous constant-current control method, so that the whole pipe network system operates synchronously at constant current; and S3, if the pulse unit at the inlet end of any branch detects that the pressure waveform is continuously abnormal, the fault diagnosis module sends a fault alarm and a diagnosis result to the main controller, the main controller isolates the abnormal branch, and the step S2 is executed again. By means of the control method and system, it can be guaranteed that the variable-frequency water pump is started in a peak shifting mode, huge pressure impact caused by simultaneous starting and stopping of all valves is avoided, the variable-frequency water pump always works near a resonance point, output is constant, flow is stable, the system operates in a resonance state, and irrigation is more stable.

The invention discloses a method and a system for monitoring pressure abnormity of a fuel oil common rail pipe of a marine main engine. The method comprises the following steps: acquiring historical operation parameter data and constructing a data set; the historical operation parameter data comprises historical host load data, historical host rotating speed data and historical fuel oil common rail pressure data; historical operation parameter data are preprocessed, an SVDD model is constructed and trained based on the historical operation parameter data, the model obtains a historical normal data hyper-sphere in a three-dimensional feature space, and the center and the radius of the hyper-sphere are obtained; similarly, real-time operation parameter data collected in real time are preprocessed and then input into the model, the distance between the real-time operation parameter data and the center of the hypersphere is obtained, and the value of the distance is compared with the value of the radius of the hypersphere in historical normal data; and when the numerical value of the distance is large, it is judged that the real-time operation parameter data is within an abnormal range, the fuel oil common rail pressure of the ship main engine is in an abnormal state, and an alarm signal is triggered. The method has the effect of low error rate.

The invention discloses a heat supply system leakage positioning method and system based on pipe network pressure characteristic analysis, and relates to the technical field of heat supply pipe network operation detection, and the method comprises the steps: collecting pressure data of each pressure monitoring point, and outputting pressure time sequence data; constructing a reference pressure interval and reference pressure fluctuation intensity of each monitoring point and a reference pressure drop interval of a pipe section corresponding to the adjacent monitoring point during operation; quantitative comparison is conducted, and the monitoring points in the abnormal pressure state and the abnormal pipe sections are determined; according to the connection relation in the pipe network structure, connectivity and boundary analysis is conducted, and a leakage section corresponding to the abnormal pressure state is determined; and finally determining the specific position of the leakage in the section based on the pressure offset space distribution of each pressure monitoring point relative to the reference pressure state in the leakage section. According to the method, accurate section division and fine position positioning of heat supply pipe network leakage are realized through pressure characteristic reference modeling and space communication analysis.

The application relates to the technical field of testing devices, and specifically discloses a solid-phase extraction device which comprises a solid-phase extraction instrument box body and a top cover, the inner cavity of the top end of the solid-phase extraction instrument box body is clamped with the top cover, the bottom end of the solid-phase extraction instrument box body is fixedly connected with a support, and the inner cavity of the support is placed with a test tube. The buffer assembly can give an alarm during the buffering process, and when the abnormal pressure reaches the shielding value, the alarm can be given to remind the staff to maintain, the alarm can be given when the pressure fluctuation drives the support to shake, the staff can find in time, the risk of liquid leakage caused by test tube deformation is prevented, the dosing assembly can quantitatively dose multiple groups of samples, the amount can be adjusted according to requirements, the accuracy in the material transfer process can be ensured, in addition, the test samples remaining on the inner wall of the dosing instrument pipeline can all fall off, meanwhile, the splashing of the extraction liquid in the falling process is prevented, and therefore the accuracy of experimental data is improved.

This invention belongs to the field of petroleum exploration technology, specifically disclosing a formation pressure prediction method and system based on PSO-CNN-RF-ABKDE. The method includes: collecting logging data of deep abnormal pressure zones in the target well and adjacent wells, regional geological data, and measured pore pressure data from adjacent wells; preprocessing the acquired data; constructing a PSO-CNN-RF model; quantifying the uncertainty of the n-value prediction using the adaptive bandwidth kernel function density estimation ABKDE algorithm; outputting the n-value confidence interval by fitting the residual probability distribution; classifying the formation pressure risk level by combining the general pressure coefficient threshold for deep abnormal pressure; and substituting the n-value confidence interval into the PSO-CNN-RF model to obtain the predicted formation pressure result and mapping it to the specific formation pressure risk level. Compared with existing technologies, this invention achieves a direct mapping between prediction results and risk levels, quantifies uncertainty while clarifying control requirements, and provides a full-chain technical support of "prediction-quantification-control" for drilling safety in deep abnormal pressure zones.

The invention discloses a formation pore pressure calculation method, system, equipment and medium, and the method comprises the steps: marking collected lithologic sections and geological stratification, and selecting at least one of collected seismic horizon velocity, density logging, acoustic logging and resistivity logging as sensitive parameters to establish a normal compaction trend line of a middle-shallow normal pressure section; a correction coefficient is adjusted by using the collected pressure measurement data, and finally, a traditional Eaton method formula is improved by using the adjusted correction coefficient, and a new formation pore pressure calculation formula is established; according to the method, the normal compaction trend line is fully utilized, the distortion of the normal compaction stratum is effectively inhibited while the abnormal pressure change is highlighted, the stability is better, the distortion is less, the pressure trend of the overlying stratum does not need to be calculated, parameters are few, the calculation efficiency is high, calculation can be carried out without logging data, the application range is wider, and the method is particularly suitable for low exploration areas without wells and with few wells.

This invention relates to a method and device for detecting material leakage from injection molding machine nozzles, belonging to the field of detection technology. It includes: responding to a fully automatic machine signal; continuously acquiring the current thermocouple temperature and injection pressure values ​​of the nozzle; setting an abnormal temperature; comparing the thermocouple temperature with the abnormal temperature to determine if the nozzle is currently in an abnormal temperature state; determining if the nozzle is currently in an abnormal pressure state based on the injection pressure value; and determining if the nozzle is simultaneously in an abnormal temperature and abnormal pressure state, triggering an alarm and / or stopping the machine. This invention achieves the effect of effectively detecting material leakage from injection molding machine nozzles using only two key parameters—thermocouple temperature and injection pressure—without requiring a large number of additional, highly sophisticated sensors, thus significantly reducing detection costs.

The application discloses a pressure control system for gas fuel supply, a controller, a communicator, a monitoring mechanism and a control mechanism, the controller is electrically connected with the communicator, the monitoring mechanism and the control mechanism respectively, the monitoring mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the monitoring mechanism monitors the pressure values in each pipe section in the liquefied gas pipeline in sequence and sends the pressure values to the controller; the control mechanism is arranged along the laying path of the liquefied natural gas pipeline in sequence, so that the control mechanism controls the communication of each pipe section in the liquefied natural gas pipeline, and the pipe section with an abnormal pressure value is closed; the controller is used for controlling the control mechanism according to the pressure values in each pipe section, and after the pipe section with the abnormal pressure value is closed, the communicator sends inspection information to an external terminal. In the technical scheme, the liquefied natural gas pipeline is monitored in real time, accidents can be quickly investigated, and the normal operation of the fuel supply system is effectively ensured.

The invention relates to the technical field of abnormal detection of pump turbines, and discloses a method and a product for determining abnormal pressure pulsation of a lower cavity of a runner of a pump turbine, a characteristic frequency set and a signal characteristic data set are identified by combining a fast Fourier transform method and an abnormal identification method, and the spectral analysis precision is improved. Furthermore, the wave velocity and the wavelength are calculated based on variational mode decomposition and phase analysis, and high-precision measurement of the propagation velocity of the pressure wave is achieved. Furthermore, through comparison of frequency, amplitude and wavelength characteristics, an abnormal state judgment result is determined, and the problem of fault positioning fuzziness is solved. Furthermore, dynamic threshold early warning is realized by utilizing the target fault diagnosis model, and the abnormal pressure pulsation attribute of the runner lower cavity of the pump turbine is positioned, so that real-time diagnosis and fault positioning of the abnormal pressure pulsation of the runner lower cavity are realized, and the operation safety and the service life of the unit are improved.

The invention relates to a method, device and equipment, and the method comprises the steps: arranging a pressure taking end in a sealing cavity, collecting and outputting a pressure signal to an external pressure monitoring unit, and enabling the external pressure monitoring unit to be provided with a power supply loop and a pressure signal collection channel which are independent of an airtight detector, the interlocking output channel is electrically connected with an interlocking component which is used for stopping detection, cutting off gas supply and releasing pressure; based on a pressure signal collected by an external pressure monitoring unit, the pressure in the sealing cavity is monitored in real time, and whether the pressure exceeds a preset safety threshold value or not is judged; when the external pressure monitoring unit judges that the pressure exceeds a preset safety threshold value and the airtight detector does not output alarm state information, the interlocking output channel drives the interlocking component to execute the steps of stopping detection, cutting off gas supply and releasing pressure so as to terminate the abnormal pressure increasing process. The redundancy and safety of the system are improved, and equipment damage and safety accidents are effectively prevented.

The application relates to a ball hinge wear test method and device and relates to the technical field of part testing tools, which comprises the following steps: acquiring a current machining number and a current wear gap value; acquiring a current wear number and pressure distribution information; extracting a pressure number and a number pressure value corresponding to the pressure number from the pressure distribution information; sorting the number pressure value to obtain a maximum pressure value and a minimum pressure value; calculating a maximum pressure difference value according to the maximum pressure value and the minimum pressure value; generating wear detection information according to the current machining number and the current wear number, and outputting the wear detection information; obtaining an abnormal pressure area according to a pressure number corresponding to the maximum pressure value; generating pressure abnormal information according to the abnormal pressure area and the maximum pressure value, and outputting the pressure abnormal information. The application has the effect of improving the accuracy of ball hinge wear test.

This invention discloses a method, control device, and oil storage equipment for monitoring abnormal pressure in a storage tank. The method for monitoring abnormal pressure in a storage tank includes: acquiring the internal air pressure value and the external air pressure value of a first storage tank; and subtracting the internal air pressure value from the external air pressure value to obtain a pressure difference P. △1 When P △1 If the pressure is less than -P1 and a first set time has elapsed, the internal and external pressure values ​​of the first storage tank are acquired again. The pressure difference is calculated by subtracting the internal pressure value from the external pressure value. If the difference is still less than -P1, a first alert message is sent to remind the breather valve that it is not breathing properly. This improves the safety of the storage tank operation.

The invention belongs to the technical field of inflatable film structure health monitoring and state evaluation, and provides an inflatable film structure air pressure abnormity monitoring method for distinguishing environment temperature change and gas leakage. According to the method, firstly, under the conditions that the structure is well sealed and gas leakage does not exist, a finite element analysis model of the inflatable film structure is established and corrected through measured data, theoretical values of internal air pressure of the structure under different temperature working conditions are obtained, then a temperature-air pressure mapping relation is established, and a theoretical air pressure calculation module is formed; in the actual operation process of the structure, internal temperature and air pressure data are collected in real time, a theoretical air pressure value under the corresponding temperature condition is obtained based on the theoretical air pressure calculation module, the theoretical air pressure value is compared with actually-measured air pressure, and air pressure deviation is calculated; by setting the air pressure deviation threshold value and the time window, the air pressure deviation value and the continuity of the air pressure deviation value are jointly judged, so that normal air pressure fluctuation caused by environment temperature change and abnormal air pressure change caused by gas leakage are effectively distinguished, and accurate recognition and early warning of tiny leakage of the inflatable film structure are achieved. According to the invention, the risk of misjudgment caused by temperature interference can be reduced, and the reliability and safety of air pressure monitoring of the inflatable film structure are improved.

The invention relates to the technical field of automobile paint conveying, in particular to an automobile paint conveying pressure regulation and control method and system based on flow self-adaption. According to the method, flow data under all conveying actions are monitored in real time, pressure analysis is conducted in combination with historical flow, and abnormal pressure actions are recognized; meanwhile, a mass offset vector is constructed based on the spraying film thickness uniformity and the paint adhesive force, and quantitative judgment of the spraying quality is achieved; performing supervised machine learning by using historical flow data, a quality offset vector and a conveying working parameter set, and establishing a regulation and control optimization model; starting operation according to a preset parameter set, and if quality abnormity or abnormal pressure action occurs, dynamically adjusting parameters based on the model; otherwise, maintaining the current parameters to run continuously. According to the method, cooperative self-adaptive regulation and control of the flow and the pressure are achieved, the spraying quality stability is improved, energy consumption and the defect rate are reduced, and intelligentization of the coating process is promoted.

The invention relates to the technical field of intelligent control, and discloses a cooking control method and device and a cooking utensil, the method is applied to the cooking utensil, and the method comprises the following steps: obtaining the current temperature, the current pressure and the current flow of the cooking utensil in response to a cooking function starting operation of a user on the cooking utensil; based on the current temperature, the current pressure and the current flow, whether an air outlet of the cooking utensil is blocked is judged, and the air outlet blocking condition is obtained; and controlling the cooking utensil to execute corresponding actions according to the air outlet blockage condition. Whether the air outlet of the utensil is blocked or not is judged on the basis of the current temperature, the current pressure and the current flow of the cooking utensil, the accuracy and reliability of blockage recognition can be greatly improved, an accurate basis is provided for executing different actions by the utensil subsequently, safety accidents caused by abnormal pressure rise are avoided from the source, and the user experience is improved. Potential safety hazards are eliminated, the cooking effect can be considered by reasonably adjusting the cooking state, and then the cooking control efficiency and the user experience are greatly improved.

The invention discloses an exception handling method and device, a storage medium and electronic equipment, and relates to the technical field of air conditioners, the exception handling method is suitable for a liquid cooling air conditioner, and the liquid cooling air conditioner comprises a liquid cooling system; the method comprises the following steps: receiving liquid inlet and outlet pressure and a liquid pump state in the liquid cooling system; when the state of the liquid pump is a running state, the pressure difference of the inlet and outlet liquid pressure is calculated; according to the abnormal pressure range where the pressure difference is located, the abnormal flowing state of cooling liquid in the liquid cooling system is determined; and executing a preset exception handling action corresponding to the exception flow state. The cooling liquid flowing abnormity processing effect of the liquid cooling air conditioner can be improved, and the operation reliability of the liquid cooling air conditioner is improved.

The invention belongs to the technical field of hydraulic control, and particularly relates to an oil cylinder stretching automatic test hydraulic system and a control method thereof, and the oil cylinder stretching automatic test hydraulic system comprises an oil cylinder, first to fourth cartridge valves, first to fourth control valves, first and second pressure sensors and a laser displacement sensor. The system controls the on-off of the cartridge valve through the control valve group to drive the oil cylinder to stretch out and draw back; the pressure sensor and the displacement sensor are used for collecting pressure of two cavities of the oil cylinder and displacement data of the piston rod in real time. The control method is characterized in that the comparison module is used for comprehensively analyzing collected data and a preset threshold value, the stretching and retracting in-place state of the oil cylinder is accurately judged, and the valve piece is automatically controlled to act so as to complete reciprocating circulation. Meanwhile, the method can monitor abnormal pressure of the oil way in real time, and the machine is stopped immediately when faults such as pipe explosion occur. According to the invention, full-process automation and unattended operation of oil cylinder testing are realized, and high compatibility, high safety and high reliability are realized.

The present application relates to the technical field of oil and gas exploitation, more particularly, to a deepwater high-permeability gas well abnormal pressure buildup test data correction method, the method comprises the following steps: analyzing test data to obtain the reason for pressure buildup data abnormality as the combined influence of temperature drop and high-permeability reservoir; obtaining pressure data at the upper and lower pressure gauges to construct a pressure profile model, and obtaining temperature data at the upper and lower pressure gauges to construct a temperature profile model at different time points at the pressure gauges; constructing a temperature-pressure coupling model according to the pressure profile model and the temperature profile model; using the temperature-pressure coupling model to correct the data of the lower pressure gauge point by point to the pressure buildup data at the middle part of the reservoir; and correcting the pressure buildup data at the middle part of the reservoir point by point back to the lower pressure gauge. The method of the present application can correct the pressure buildup data with an abnormal slow downward trend to a normal slow upward trend, and is used for well test interpretation and analysis to obtain formation and wellbore parameters.

This utility model discloses a cold and heat storage pipeline management device for energy stations, relating to the field of pipeline management technology. It includes a cold and heat storage pipeline body with an installation hole on its upper surface. A first installation pipe is fixedly connected inside the installation hole. A sealing frame is formed on the upper surface of the first installation pipe, and a second installation pipe is fixedly connected to the upper surface of the sealing frame. A sealing mechanism is provided inside the sealing frame, and fixing blocks are provided inside both the first and second installation pipes. This utility model uses wireless temperature and pressure sensor heads to directly contact the medium inside the pipeline, enabling real-time collection of temperature and pressure data. This data is then wirelessly transmitted to a management terminal. When a sudden temperature change or abnormal pressure drop occurs, the system can immediately issue an early warning, significantly reducing the time lag in leak detection compared to traditional manual inspections, thus reducing energy waste and safety hazards.

The present application relates to beer fermentation technology field, specifically to a kind of beer fermentation equipment and fermentation pressure dynamic adjustment method, method includes: determining the fermentation state suspected change moment of fermentation tank in beer fermentation process;Predict the pressure of fermentation state suspected change moment, determine abnormal pressure difference according to the pressure difference between predicted pressure and actual pressure, classify abnormal pressure difference, determine fermentation state change moment and its pressure change performance;At least according to the pressure abnormality degree of each moment of fermentation tank and fermentation response speed, determine the pressure regulation coefficient of each moment;According to the pressure regulation coefficient, adjust the pressure of each moment of fermentation tank, the present application can improve the reliability of pressure regulation, reduce the pressure fluctuation in fermentation tank.

The present application relates to offshore oil exploration and drilling engineering technical field, more particularly, to an abnormal pressure detection and correction method of pressure sensing device. It includes the following steps: S1: converting data into time series format; S2: data segmentation; S3: setting the window size of sliding time window and quantile multiple distance; S4: calculating the difference between the current value and the median value of pressure value in the sliding time window; S5: judging whether the difference falls within the normal range interval; S6: judging whether the current value is equal to the maximum value of pressure value of short-term sequence x2; S7: judging whether the difference between the suspected abnormal value and the median value of pressure of short-term sequence x2 is greater than or equal to the maximum threshold, if yes, the suspected abnormal value is corrected, otherwise the process is ended. The present application can detect abnormal pressure value caused by external factors interference, and correct the abnormal pressure value to normal pressure value, avoiding the misjudgment of the working state of pressure sensing device caused by external factors interference.

The invention relates to the technical field of beer fermentation, in particular to beer fermentation equipment and a fermentation temperature and pressure dynamic adjusting method, and the method comprises the following steps: determining a suspected change moment of a fermentation state of a fermentation tank in a beer fermentation process; predicting the pressure at the suspected change moment of the fermentation state, determining abnormal pressure differences according to the pressure difference between the predicted pressure and the actual pressure, classifying the abnormal pressure differences, and determining the change moment of the fermentation state and the pressure change performance thereof; determining a pressure regulation coefficient at each moment at least according to the pressure abnormal degree and the fermentation response speed of the fermentation tank at each moment; according to the method, the pressure regulation reliability can be improved, and the pressure fluctuation in the fermentation tank is reduced.

The application provides a turbidite sand body comprehensive evaluation method suitable for a faulted basin slope zone, and the turbidite sand body comprehensive evaluation method suitable for the faulted basin slope zone comprises the following steps: step 1, fine structure interpretation is carried out on a work area; step 2, a sand body flattening thickness is obtained as a coefficient H, and a sand body distribution area is obtained as a coefficient S; step 3, a sand body oil and gas containing probability L is calculated; step 4, abnormal pressure prediction is carried out on the sand body, and an abnormal pressure coefficient is used as a probability coefficient p; and step 5, comprehensive evaluation parameters are quantitatively represented, Z is defined as the comprehensive evaluation parameter, Z=H*S*L*p, and a target is optimized based on this. The turbidite sand body comprehensive evaluation method suitable for the faulted basin slope zone comprehensively considers main control factors of turbidite sand body development in the slope zone and quantitatively represents the main control factors, and has strong operability, and can be widely popularized in turbidite sand body prediction in the slope zone.

The invention discloses an intelligent monitoring and early warning method and system for abnormal pressure of a GCB switch of a large hydropower station, and the method comprises the steps: installing a sensor module in a pressure device of the GCB switch, and enabling the sensor module to transmit the collected data of the GCB switch to a data collection and transmission unit; the data acquisition and transmission unit receives data acquired by the sensor module at a set frequency, and transmits the acquired data to the data processing and analysis center in a wired or wireless communication mode; the data processing and analysis center establishes a model; comparing the data acquired in real time with the data output by the model so as to carry out pressure abnormity identification, stroke-time abnormity identification and parameter linkage abnormity identification; and the early warning module adopts a monitoring system to give an abnormal pressing event alarm and a voice alarm. According to the application, the pressure state of the GCB switch can be accurately monitored in real time, abnormal pressure conditions can be found in time, early warning is given out, and the safety and reliability of hydropower station equipment operation are improved.

According to the anti-leakage sealing punch forming process, pressure data of all areas are collected, and the pressure mean values F < high >, F < low > and alpha < lip > are obtained through a control module; if the alpha lip exceeds the preset threshold value, it is indicated that the pressure imbalance phenomenon (abnormal pressure) exists on the sealing lip edge, local sealing failure or excessive extrusion deformation is possibly caused, and therefore the specific reason causing the pressure imbalance phenomenon can be deduced by judging whether the pressure mean values F high and F low are abnormal or not again.

The invention provides a water injection well abnormal pressure measurement correction method and device and a storage medium, and the method comprises the steps: judging whether a water injection well pressure measurement result is abnormal or not according to obtained data, if yes, judging whether the water injection well pressure drop test time meets the requirement or not, and if the pressure drop test time meets a set value, judging whether the water injection well pressure drop test time meets the requirement; whether deviation exists between the water injection well static pressure value and the oil well static pressure value or not is judged, and if deviation exists between the water injection well static pressure value and the oil well static pressure value, the aligned horizontal normal production wells are classified into oil well double-opening, oil well single-opening and oil well double-closing according to the deviation; prediction results of oil reservoir bubble point pressure, water injection well pressure measurement and water injection well static pressure are obtained according to oil well double-opening, oil well single-opening and oil well double-closing, dimensionless method regression correction is carried out to obtain a typical injection and production well group algorithm, and a horizontal water injection well pressure value calculated according to the typical injection and production well group algorithm is a correction value. According to the algorithms, the number of times of oil well static pressure testing is reduced, and accurate monitoring of oil reservoir pressure and static pressure of a water injection well is ensured.

The application relates to the technical field of air tightness inspection, in particular to a floating type lifesaving equipment air tightness inspection method, device and system, the method comprises the following steps: acquiring temperature data and pressure data of lifesaving equipment in each pressure maintaining test; dividing the total test duration of each pressure maintaining test into multiple time intervals; correcting the pressure data at each time point based on the temperature deviation at each time point; constructing a comprehensive anomaly index based on the fluctuation characteristics of the pressure data when the temperature is unchanged in each time interval of each pressure maintaining test, and the similarity degree between the corrected pressure data of each pressure maintaining test and other pressure maintaining tests in the same time interval, and then acquiring a credible interval in each pressure maintaining test; judging whether the air tightness of the lifesaving equipment is qualified based on the pressure decay rate of all the credible intervals. The application removes abnormal pressure data, improves the calculation accuracy of the pressure decay rate, and further improves the accuracy of the air tightness inspection result.

This invention belongs to the field of safety supervision technology and provides a safety control method and system for the filling process of industrial gas cylinders. First, the legality of the label data and identity verification information is judged. If legal, gas filling proceeds; otherwise, filling is not permitted. Then, during the gas filling process, the pipeline pressure change curve at each stage is analyzed. Based on the slope and characteristic points of the pressure change curve, it is determined whether the filling is normal. If normal, gas filling continues; otherwise, it stops. Simultaneously, relevant information about the gas cylinder during the filling process is periodically acquired, and any abnormalities are assessed. If an abnormality is detected, an early warning is issued; otherwise, normal supervision is maintained. This achieves safety supervision before gas filling and stops gas filling when abnormal pressure is detected during the filling process, and issues an early warning when abnormalities are detected in the gas cylinder during filling, thus realizing control functions during the filling process.