965 results about "Flow transducer" patented technology

The invention relates to the technical field of water supply pipeline detection, and discloses an underground water supply pipeline health grade evaluation and risk prediction method, which comprises the following steps: sensor arrangement: arranging a flow sensor, a pressure sensor and a sonic sensor at key positions of an underground water supply pipeline; and data acquisition: acquiring signals of the sensor in real time through a data acquisition module, wherein the signals comprise flow, pressure and sound wave signals. Preprocessing the data: carrying out preprocessing such as denoising and normalization on the collected signals; and multi-source data fusion: inputting flow, pressure and sound wave signals into a deep neural network model, and performing feature extraction and fusion analysis. And health level assessment: assessing the health level of the pipeline based on the output result of the deep neural network model. And risk prediction: predicting abnormal working conditions possibly occurring in the future and risk levels of the abnormal working conditions by analyzing the current pipeline state and historical data. And abnormal positioning: accurately positioning an abnormal position in combination with the propagation time of the sensor signal and a positioning model of the deep neural network.

A flow sensor for sensing fluid flow. The flow sensor includes an exterior, interior, a circuit board, and first and second ports. The first and second ports permit fluid to flow into and out of the interior. A Hall Effect Sensor in the interior detects the number of revolutions of an impeller. An electric coupler interfaces with the flow sensor and a transmitter for communication of the revolutions of the impeller to a controller. The controller determines the rate of fluid flow in a conduit. The controller issues a command signal to a component of a hydraulic system to alter the rate of fluid flow in the conduit.

The invention discloses a heat dissipation control method, device and system based on an array chip and a medium. The method comprises the steps that the basic valve opening degree is determined based on the temperature value of any partition and a valve opening degree mapping table; determining a target valve opening degree of each electric valve based on the basic valve opening degree and a spray coverage overlapping model, and sending the target valve opening degree to each electric valve; calculating a target total flow based on all target valve opening degrees, adjusting the rotating speed of a liquid supply pump through a frequency converter, and enabling a measured value of a flow sensor to be the target total flow; determining a target pressure value based on the saturation temperature of the cooling liquid, and adjusting the power of the vacuum pump or the three-way vacuum electromagnetic valve to enable the pressure value of the evaporation cavity to be the target pressure value. According to the method, three-layer linkage logic of partition precise temperature control, system flow coordination and global pressure setting is established, scattered devices are integrated into a whole, overall adjustment of the system level is achieved during heat dissipation control, instructions do not need to be sent frequently to control each valve, and the electric energy consumption of the system is reduced.

The invention discloses a multifunctional hydraulic system experiment table, which relates to the technical field of hydraulic system experiment tables and comprises a time base line synchronous control module, a phase lock correction stability control module, a false peak identification and correction module, a multi-dimensional fault-tolerant judgment control module and a reverse energy slow-release anti-reverse module. And the time base line synchronous control module is used for establishing a cross-sensor unified time base line control structure, generating a synchronous reference surface by using a high-stability crystal oscillator signal, and executing nanosecond phase calibration on sampling signals of the pressure sensor and the flow sensor by taking the synchronous reference surface as a unified time reference. According to the invention, high-precision synchronous acquisition of pressure and flow signals is realized through unified time base line and phase locking correction, and high-pressure transient test data is ensured to be real and stable; and meanwhile, control logic is reconstructed, and an energy slow release strategy is introduced, so that the pressure relief process is stable and controllable, pump reverse rotation and structural impact are avoided, and the safety, reliability and self-healing stability of the experiment table are remarkably improved.

The invention relates to the technical field of vehicles, and discloses an engine intelligent layered thermal management system and method based on multivariable predictive control, and the system comprises a thermal management execution module, an information sensing module and an intelligent control module; the information sensing module is used for collecting real-time information and sending the real-time information to the intelligent control module; the information sensing module comprises a plurality of sensors and a communication interface, the plurality of sensors at least cover a temperature sensor, a pressure sensor and a flow sensor, and the communication interface is used for obtaining engine torque, rotating speed, fuel injection amount, boost pressure and vehicle speed information; the intelligent control module receives the real-time information sent by the information sensing module, performs thermal load prediction and multi-target optimization calculation to obtain an optimal control sequence, and sends the optimal control sequence to the thermal management execution module; and the thermal management execution module receives the optimal control sequence and calls an execution element to execute a thermal management action.

The invention relates to the technical field of metallurgical furnace charge conveying and control, and discloses a top-blown furnace multi-channel supersonic jet type feeding control method and system.The method comprises the steps that flow distribution in a nozzle is achieved through a piezoelectric ceramic high-speed valve installed at a pipeline inlet, and a nozzle servo motor is controlled at the top of a spray gun to adjust the spray angle of the spray gun; the feeding speed, pressure and temperature are monitored in real time through a pressure sensor and a flow sensor arranged in an inlet area of the pipeline and an infrared thermometer mounted at the top of the furnace; the carrier gas flow, the nozzle opening degree and the spraying angle are dynamically adjusted through control of the PLC executing mechanism, and collaborative optimization of the material flow vector, the flow field in the hearth and the heat and mass transfer process is achieved. The system comprises a spray gun, a piezoelectric ceramic high-speed valve, a flow sensor, an infrared thermometer, a nozzle control servo motor, a temperature measurement control small servo motor and a control room. The comprehensive operation efficiency of energy density distribution optimization, reaction efficiency improvement and energy consumption index reduction of the molten pool reactor is finally realized.

The invention relates to the technical field of gas micro-flow sensors, in particular to a thermal gas micro-flow sensor, a flow channel structure and a design method. A rib plate layer, a groove layer and a chip layer of the runner structure of the thermal gas micro-flow sensor are fixedly connected through detachable fasteners, a rib plate is inserted into a groove, first ventilation intervals are formed between the rib plate and the two ends of the groove in the length direction, second ventilation intervals are formed between the rib plate and the bottom of the groove, and a mounting groove is opposite to a through groove in position. And the gas inlet, the gas outlet, the second ventilation interval and the two first ventilation intervals are communicated. By replacing the rib plate layers with different rib plate sizes and / or the groove layers with different sizes, the shape and size of the cross section of the runner can be adjusted. Through mechanical structure innovation, the flow channel performance is convenient and adjustable, great flexibility is provided for sensor research and development, the research and development period is shortened, and the iteration cost is reduced.

The invention relates to the technical field of crustal stress measurement, in particular to a hydraulic fracturing multi-parameter in-situ crustal stress detection device, which comprises an upper packer, a measurement section and a lower packer which are connected in sequence, and further comprises a data acquisition unit, a fracturing section multi-parameter acquisition device and a fracturing crack ultrasonic imaging synchronous detection device, the fracturing section multi-parameter acquisition device and the fracturing crack ultrasonic imaging synchronous detection device are both mounted in the measurement section and can synchronously observe the fracturing section to realize a parallel observation mode; the fracturing section multi-parameter acquisition device comprises a flow sensor and a pressure sensor; the fracturing crack ultrasonic imaging synchronous detection device is used for synchronously observing the dynamic change process of the fracturing crack; and the data acquisition unit is used for collecting flow data and pressure data, establishing a pressure-flow curve to obtain crustal stress data, and collecting dynamic change process data of fracturing cracks to determine the magnitude and direction of crustal stress.

The invention discloses a real-time monitoring control system based on a thermal flow sensor and a controller, and relates to the technical field of sensor monitoring. According to the real-time monitoring control system based on the thermal flow sensor and the controller, the method comprises the steps that S1, sensor monitoring data and historical statistical data are preprocessed; s2, lagging and response time dynamic characteristics are extracted; performing modal decomposition, phase estimation, peak calculation and steady-state noise analysis; s3, executing phase compensation, peak value recovery and enhancement compensation judgment; recording a residual sequence and a compensation parameter, and outputting optimized flow data; s4, constructing a credibility interval and dynamic consistency score synthesis control credibility mark; and executing security constraint and prediction filtering and archiving. The problems that an existing thermal flow sensor generates obvious phase lag and peak smoothing distortion due to the influence of thermal diffusion thermal inertia under the rapid fluctuation and pulsation working conditions, and the real-time monitoring precision and the closed-loop control stability are difficult to guarantee due to the lack of an online dynamic response analysis and compensation mechanism are solved.

The invention discloses a constant-pressure constant-temperature energy-saving water supply control system for domestic hot water, particularly relates to the field of building water supply and drainage and heat energy control, and comprises a signal capture module, a risk early warning module, a buffer release module, a pre-judgment adjustment module and a state reconstruction module. The signal capturing module is used for acquiring real-time flow and real-time pressure of a water supply pipeline and a water return pipeline by arranging a flow sensor and a pressure sensor on the water supply pipeline and the water return pipeline respectively, then counting the real-time flow and the real-time pressure according to a time sliding window, and outputting time sequence data; according to the invention, a closed-loop control process of time sequence data capture, disturbance data identification, buffer water body release, pump set operation interval determination and compensation distribution result output is executed in sequence in a sudden water consumption scene, so that real-time and stable temperature and pressure control is realized at a user side; therefore, the problem of constant-temperature and constant-voltage failure caused by feedback lag in the prior art is solved.

The invention discloses an aluminum wheel die-casting die temperature closed-loop regulation and control system and method, and belongs to the technical field of aluminum alloy die-casting forming and intelligent control, the system comprises a data acquisition module, specifically a temperature sensor, a flow sensor and a pressure sensor which are arranged at key positions of a die, and the data acquisition module is in communication connection with a prediction module; the prediction module adopts a CNN-LSTM composite neural network model, the prediction module is in communication connection with an optimization decision module and provides a prediction value, the optimization decision module adopts an integrated tree structure Pareto estimator (TPE) and provides an optimal decision to the execution control module, the execution control module is a PLC, and the PLC is connected with the prediction module. And a feedback learning module is also arranged and is used for carrying out online updating on the prediction model and the optimization strategy according to the control effect data. The method can effectively reduce energy consumption and manual intervention cost, and has remarkable practical value and economic value.

The utility model provides an unmanned aerial vehicle multi-angle sprinkler head, which relates to the unmanned aerial vehicle field, and comprises a connecting rod and a mounting rack, the side wall of the connecting rod is provided with a first motor, the output end of the first motor is provided with a first transmission shaft, and the upper part of the mounting rack is connected with the first transmission shaft through an adjusting rod; adjusting seats are connected to the two sides of the mounting frame through electric push rods, nozzles are arranged on the adjusting seats through second transmission shafts, second motors are connected to the output ends of the second transmission shafts, and intelligent sensing assemblies are further arranged on the connecting rods and the mounting frame. According to the utility model, a wind speed sensor in the intelligent sensing assembly is used for detecting wind speed, a laser radar sensor is used for carrying out terrain scanning, a flow sensor is used for detecting the flow of the nozzle, and data of a plurality of sensors are combined, so that the control module can more comprehensively know the working environment, and the angle of the nozzle can be more intelligently adjusted; the practicability of the device is improved.

The invention relates to the technical field of flue gas treatment, in particular to a device for removing sulfur dioxide in flue gas. Comprising a tower body, the lower end of the tower body fixedly communicates with an air inlet pipe, the air inlet pipe is provided with a flow sensor, the upper end of the tower body fixedly communicates with an air outlet pipe, second side plates are fixed to the front side and the rear side in the tower body, and two first side plates are arranged between the two second side plates and connected with the tower body through electric telescopic rods; a spraying assembly is arranged at the central position in the upper end of the treatment cavity, and the spraying assembly is communicated with the liquid inlet flow control assembly. According to the invention, the two first side plates synchronously move towards each other or away from each other, so that the circulation cross-sectional area of the treatment cavity is changed in real time. When the flue gas flow is reduced, the cross section is reduced, the flue gas and the atomized treating fluid are forced to fill the cavity, and the effective contact area of the atomized treating fluid and the flue gas is ensured; when the flow is increased, the cross section is enlarged, the gas flow rate is reduced, and the reaction time of flue gas and atomized treating fluid is prolonged.

The invention relates to the field of steel energy conservation and pollution control, in particular to a steel VOCs regulation and control method based on emission energy consumption coupling, which comprises the following steps: arranging a detection grid and a flow sensor at an outlet of an adsorption area of a zeolite rotating wheel, monitoring waste gas flow in real time, marking a detection period based on variance analysis, and determining the emission energy consumption of the zeolite rotating wheel. And determining an infrared observation time domain section by combining the rotating speed of the rotating wheel. Acquiring an infrared image of an outlet of a desorption area in the time domain section, identifying a specific temperature clustering area through clustering analysis, judging whether the local area of the runner is abnormal or not according to the proportion of the specific temperature clustering area, and marking and adjusting desorption parameters such as the rotating speed of the runner and the temperature of desorption gas for the abnormal area; in the subsequent rotation process, infrared images are collected again to verify the adjustment effect, if the reduction amount of the proportion of the specific temperature clustering area does not reach the threshold value, early warning is given out, and therefore the operation economical efficiency and reliability of the whole treatment system are improved.

The invention discloses a coal rock drilling operation state while-drilling monitoring system and method. The system is characterized in that a pressure and flow sensor I is mounted on a circulating hydraulic pipeline of a feeding oil cylinder; a pressure and flow sensor II is mounted on a circulating hydraulic pipeline of the hydraulic rotary motor; a displacement sensor is mounted on the feeding oil cylinder; the video collector is mounted above a coal wall of a construction roadway; the data acquisition and processing module is connected with each sensor; the video analysis module is connected with the video collector; the state determination module is connected with the data acquisition and processing module and the video analysis module. The method comprises the following steps: acquiring a multi-source drilling state signal and working image data; preprocessing the data; respectively acquiring state classification feature information and drill rod operation state image data, and inputting the state classification feature information and the drill rod operation state image data into a double-flow neural network to extract feature vectors; vector splicing is carried out through a Softmax gating fusion mechanism, and then a judgment result is output through a Softmax classifier. According to the method, the running state of the coal rock drilling can be efficiently and accurately judged.

To improve responsiveness while reducing the effect of noise, a valve control method for controlling a valve of a fluid control device includes generating a target response function converted from the flow rate setting using a target response transfer function; generating a target voltage function by making a correction in nonlinearity of a drive voltage for the valve and a flow rate, with respect to the target response function; generating a feedforward voltage signal from the target voltage function by making a correction corresponding to the delay characteristic of the valve; causing a feedback controller to generate a feedback voltage signal from a deviation between the target response function and a flow rate measurement of a flow rate sensor; generating a corrected command voltage signal using a feedforward voltage signal and the feedback voltage signal; and controlling the valve using the corrected command voltage signal.

The invention relates to the technical field of mold temperature control, and particularly discloses a pulse cooling and heating intelligent mold temperature controller and a control method. Comprising a plurality of mold cavity surface temperature sensors, a waterway temperature sensor, a flow sensor, a liquid electromagnetic valve group, a mold heater and a control unit electrically connected with the sensors, the electromagnetic valve group and the heater, according to the method, the mold surface temperature fluctuation can be obviously reduced, the mold surface temperature peak-peak fluctuation after pulse cooling control is obviously reduced, and the dimensional stability and the surface quality of an injection molding part can be improved; through zoning temperature control, the temperature difference of all parts of the mold is reduced, and warping and internal stress concentration can be reduced; due to the fact that the low-temperature refrigerant is adopted, the heat exchange efficiency is obviously improved, the cooling time is shortened, and the production efficiency is improved; and through the real-time monitoring and protection strategy of the flow / temperature difference, the risks of mold thermal shock and equipment failure caused by abnormal cooling are reduced.

The application provides a multifunctional exhaled breath online sampling device and a method thereof. The device comprises a pressure measuring system, a flow measuring system, a mode switching system and a cleaning system. The method comprises the following steps: before sampling, the NC of a two-position three-way electromagnetic valve is closed, the NO is opened, and the gas in the exhaled breath online sampling device is exhausted through a normally open two-way electromagnetic valve; then the NO of the two-position three-way electromagnetic valve is closed, and the NC is opened; the exhaled breath is blown into the exhaled breath online sampling device through a blowing nozzle, the exhaled breath flows through a pressure sensor, the pressure of the exhaled breath is measured, and the saliva is collected into a saliva warehouse; the exhaled breath flows from a high-pressure detection port to a low-pressure detection port, and the flow of the exhaled breath is measured through a flow sensor; the exhaled breath flows from the low-pressure detection port to an electromagnetic valve frame, and then flows through a sampling port through a passage NO, and is collected by a sample container or analyzed online by an analysis instrument; and the pressure of the exhaled breath, the flow of the exhaled breath and the result of the online analysis are displayed through a screen and a control system.

The invention relates to the technical field of corrosion tests, in particular to environment simulation equipment based on an internal corrosion test, which comprises a test box, a collection box and a water bath box, the test box is fixedly mounted at the top of the water bath box through four supporting blocks, and the four supporting blocks are respectively positioned at four corners between the test box and the water bath box; the medium box enables the spraying assembly to accurately spray a test medium in the box to the surface of a test sample borne by the bearing assembly through the water inlet pipe and the spraying assembly, a corrosion test simulation environment is constructed, the flow sensor collects medium flow signals in real time, and the control module adjusts the rotating speed of the water pump and the opening degree of the electromagnetic valve according to signal feedback. Precise detection and dynamic adjustment of the spraying flow are achieved, the consistency of spraying working conditions of multiple groups of test samples is guaranteed, meanwhile, the water bath box conducts temperature pretreatment on media in the medium box in a water bath heating mode, the water bath box and a thermometer complete cooperative regulation and control of the temperature, precise control of the test temperature is achieved, and the corrosion simulation requirements of different service environments are met.

The utility model relates to the technical field of water treatment and discloses a water treatment online sampling device which comprises a rack, a sampling pump is fixedly mounted on the inner wall of the bottom of the rack, a sampling pipe is mounted at the water pumping end of the sampling pump, a connecting flange is fixedly connected to the end, away from the sampling pump, of the sampling pipe, and a filter is arranged at the end, close to the connecting flange, of the sampling pipe. The controller is connected with the sampling pump, the water conveying end of the sampling pump is provided with a conveying pipe, the conveying pipe is provided with a flow adjusting assembly, and the flow adjusting assembly comprises a flow adjusting valve and a flow sensor. According to the invention, the accuracy and stability of sampling each time can be ensured, strict control on the water sample amount and flow velocity under different detection requirements is met, the sampling quality is improved, and the real-time water quality condition in the water treatment process is better reflected.

The invention discloses a heat adjusting system and an adjusting method of a dynamic balance type intelligent heat meter, relates to the technical field of heat adjusting systems, and aims to solve the technical problem that an existing heat adjusting system is generally insufficient in dynamic balance ability. Comprising a temperature sensor, a flow sensor and a timing device and is used for collecting historical data of temperature, flow and use time of a user side and real-time operation parameters of a heat supply pipe network in real time, and the real-time operation parameters comprise water supply temperature, water return temperature and pipe network pressure; and the central processing unit is in communication connection with the data acquisition module, receives and stores the historical data and the real-time operation parameters and forms a historical database, the central processing unit integrates a dynamic balance algorithm, and the algorithm analyzes and predicts the heat demand of each user side in real time based on the historical data and the real-time operation parameters. The method has the advantage that the dynamic balance capacity of the heat supply pipe network is improved.

The invention discloses a filling flow signal acquisition control system which comprises a microcontroller circuit, an analog signal acquisition circuit, a pulse signal acquisition circuit and an electromagnetic valve control circuit, and the analog signal acquisition circuit, the pulse signal acquisition circuit and the electromagnetic valve control circuit are electrically connected with the microcontroller circuit. The pulse signal collecting circuit is used for collecting digital pulse signals of a flow sensor on a filling pipeline, the electromagnetic valve control circuit is electrically connected with a driving board of an electromagnetic valve on the filling pipeline, and the microcontroller circuit comprises a microcontroller with the model of LPC2378. The microcontroller is used for generating a control instruction for controlling the opening degree of the electromagnetic valve in a complementary mode according to the analog signal and the pulse signal of the flow sensor. The opening degree of the electromagnetic valve can be dynamically adjusted through an analog signal and pulse signal double-source acquisition framework, the flow filling precision is improved, and the system is suitable for industrial large-flow filling scenes.

The present application relates to a kind of based on gas pipe network multidimensional sensor data's leak prediction method, comprising the following steps: using Transformer model, according to the use habit of each gas equipment, the reasonable interval of each gas equipment is screened out;Wherein, the use habit is the duration of each use of gas equipment;The detection result of flow sensor configured in the main transport pipeline of gas pipe network is obtained;When the detection result is transport state, the duration of each gas equipment is obtained;Based on the duration of each gas equipment and the reasonable interval corresponding to each gas equipment, data processing is carried out, and whether early warning and leak alarm are judged according to data processing result and gas sensor;When the detection result is non-transport state, then according to gas sensor, whether early warning is judged.The present application can improve the accuracy and timeliness of gas leakage prediction.

The invention discloses an anti-clogging high-precision liquid flow sensor, and belongs to the technical field of liquid flow sensors, the anti-clogging high-precision liquid flow sensor comprises a shell, a linkage mechanism is arranged in the shell, the linkage mechanism comprises a fixing frame, a bearing, a rotating shaft, a turbine and a signal blade, one end of the rotating shaft is provided with a transmission mechanism, and the other end of the rotating shaft is provided with a transmission shaft; an electromagnet and a flushing mechanism are arranged at the bottom of the shell, the flushing mechanism comprises an electromagnetic valve and a flushing pipe, the flushing pipe is communicated with one end of the electromagnetic valve, the other end of the electromagnetic valve is communicated with a vertical pipe, and the top end of the vertical pipe is communicated with the shell. By introducing an intelligent blockage monitoring mechanism based on mechanical transmission and pressure sensing, the reliability and the pre-maintenance capability of the sensor are remarkably improved, and by integrating a set of on-line high-pressure flushing system triggered by a controller instruction, the self-cleaning function of the interior of a sensor flow channel is achieved; and the long-term cleanness and the measurement precision of the core measurement part are effectively guaranteed.

Disclosed are methods and a safety system implemented within a structure of automatic modification of a rate of filling an air bottle with breathable air in the safety system. In accordance therewith, an air fill charge rate controller device is coupled to the breathable air from a source thereof in the safety system having a fixed piping system installed within the structure for supply of the breathable air across the safety system. A flow rate of the breathable air from the source thereof is detected through a flow sensor associated with the air fill charge rate controller device. In accordance with the detection of the flow rate, a control unit of the air fill charge rate controller device automatically modifies a fill rate at which the air bottle is to be filled with the breathable air.

The invention provides a method and a system for processing blockage of a discharge port of a limestone powder bin of a thermal power plant, which are used for monitoring the running state in real time through a pressure, humidity and flow sensor array arranged at the discharge port and intelligently judging the normal, pre-blockage risk or complete blockage state according to a preset threshold value. Aiming at different states, stage treatment is automatically started: when the risk of pre-blocking exists, a propeller type stirrer in the bin is started, and dry compressed air is introduced, so that the flowability of powder is improved to prevent blocking; and when complete blockage occurs, a composite dredging mechanism is formed by linkage of high-frequency impact of the pulse air hammer, overall vibration of the vibration motor and purging of high-pressure air. The whole process automatic control system performs centralized control, and is provided with a human-computer interaction interface for monitoring and intervention. The system realizes the conversion from passive dredging to active prevention, has the advantages of accurate blockage early warning, efficient and thorough treatment, high automation degree, high reliability and the like, and effectively ensures the continuous and stable operation of the desulfurization system of the thermal power plant.

The invention discloses an external clamping type flow sensor medium temperature calculation method, and relates to the technical field of testing and metering, and the method comprises the steps: obtaining the outer wall temperature measurement values of two sensors through a temperature collection device; by means of double-temperature-probe averaging treatment, accidental errors of single-point measurement are effectively reduced, three heat transfer mechanisms of heat transfer, solid heat conduction and convection-radiation combined heat dissipation are constructed, a fluid dynamic criterion is introduced to accurately calculate a convection heat transfer coefficient, quantitative heat transfer models outside and inside the tube are constructed, and the heat transfer efficiency is improved. By introducing an empirical formula dynamically coupled with the environment wind speed and a fluid mechanics criterion correlation formula based on the Reynolds number criterion, scene self-adaption accurate calculation of the key heat exchange coefficient is achieved, iterative correction of fluid physical property parameters is combined, and through iterative calculation and real-time correction of the physical property parameters, the real-time correction of the fluid physical property parameters is achieved. A three-layer progressive error correction system of dynamic time correction, scene database correction and multi-dimensional anti-interference correction is established, and high precision and high reliability of temperature calculation are achieved.

The invention relates to the technical field of vacuum detection, in particular to a vacuumizing detection system based on a micro-flow sensor, which comprises a data acquisition module for acquiring real-time micro-flow time sequence data and real-time pressure data; the reference reconstruction module is used for constructing an ideal attenuation model and generating an ideal flow reference curve; the parameter injection module is used for injecting physical hard leakage factors and surface deflation factors to generate a theoretical leakage flow curve; the difference extraction module is used for executing difference operation to respectively generate a real residual feature and a theoretical residual feature; the similarity judgment module is used for calculating waveform similarity and judging a physical leakage state; according to the invention, tiny leakage signals are accurately locked under strong background noise, and the false alarm rate is obviously reduced.

The invention discloses a gas compressor test device and method, and belongs to the field of gas compressor tests.The gas compressor test device comprises a driver, and a driving shaft of the driver is used for being connected with a main shaft of a gas compressor; the unloading assembly comprises a balance drum, a high-pressure gas supply unit, an exhaust unit and an adjusting valve, the balance drum is used for being connected with a main shaft of the gas compressor and used for being connected with an impeller on the main shaft of the gas compressor, the high-pressure gas supply unit is used for being communicated between the balance drum and the impeller, and the exhaust unit is used for being communicated with the side, away from the impeller, of the balance drum; an inlet temperature sensor, an inlet pressure sensor and a flow sensor are arranged in the double-twisted-wire air inlet channel; an outlet temperature sensor and an outlet pressure sensor are arranged in the annular outlet throttler; and a controller. The technical effects of the invention lie in that the device not only facilitates the independent test of the related gas compressor, but also facilitates the small axial force of the impeller of the gas compressor borne by the thrust bearing.