17 results about "Abnormal pressure" patented technology

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.

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.

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 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 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.

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 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 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.