514 results about "Electromagnetic flowmeter" patented technology

The invention relates to the technical field of electromagnetic flowmeter calibration, and discloses an electromagnetic flowmeter online calibration system and an acquisition and storage device. The system comprises a signal acquisition module, a data processing module, an error analysis module, a parameter calibration module and a real-time monitoring module. The signal acquisition module captures an original signal waveform through a multi-channel sensor array and acquires flow signal data to generate a state set; the data processing module uses a wavelet packet transformation and adaptive filtering combined algorithm to reduce noise and extract features; the error analysis module constructs a dynamic time warping error matching model to obtain an error correction coefficient; the parameter calibration module adopts a fuzzy control and proportional integral differential composite strategy, and adjusts excitation current and electrode sensitivity according to an error correction coefficient; the real-time monitoring module establishes a rolling optimization model with time-varying constraints, and generates a calibration instruction in combination with signal stability and power consumption limitation. According to the system, online accurate calibration of the electromagnetic flowmeter is realized, and the measurement accuracy and the equipment operation stability are improved.

The invention discloses a zero point correction method for an electromagnetic flowmeter based on pressure compensation, which relates to the technical field of industrial flow measurement, and is characterized in that abnormal data is corrected through multi-parameter data acquisition and preprocessing by using Kalman filtering denoising and an isolated forest algorithm, so that the accuracy of the data is ensured; a multi-parameter compensation model is further constructed, an LSTM network is combined with an attention mechanism to dynamically distribute weights, and the weights are lightly deployed to an embedded microcontroller through a TensorFlow Lite framework, so that rapid reasoning and real-time correction are realized; in the operation process, an embedded system reads preprocessed data in real time, a model is input to obtain a zero drift compensation value, compensation is carried out by comprehensively considering factors such as fluid density, pipeline vibration and electromagnetic interference, and a self-adaptive weight adjustment mechanism is introduced to optimize compensation precision; the measuring precision and the long-term operation reliability of the electromagnetic flowmeter are remarkably improved, and the electromagnetic flowmeter is suitable for flow measurement under complex working conditions.

The invention provides a pulse output sensor control system for an electromagnetic flowmeter, which relates to the technical field of electromagnetic flowmeters and comprises an acquisition module, a modeling module, a generation module, a judgment module and an output control module. The modeling module performs state vector construction and drift identification; the generation module generates control parameters based on state vectors and synthesizes pulse signals; the judgment module evaluates signal deviation and generates scores; the output control module dynamically updates the control parameters according to the scores and drift information; and real-time adaptive adjustment of pulse output is realized. The system can effectively improve the stability and accuracy of output signals of the electromagnetic flowmeter under complex working conditions.

The invention belongs to the technical field of flowmeter verification, and discloses a two-phase flow analysis system and method based on a differential pressure flowmeter and an electromagnetic flowmeter. The method comprises the steps that a differential pressure flow meter and an electromagnetic flow meter are arranged on adjacent sections of a pipeline, the electromagnetic flow meter collects voltage signals and analyzes the voltage signals to obtain liquid phase volume flow, and liquid phase mass flow is obtained by combining temperature correction; the differential pressure flowmeter calculates the gas density by using an ideal gas law according to the temperature and the pressure; inputting multi-sensor time sequence data into the weight optimization model, and optimizing the volume gas content and the total mass flow rate; baseline parameters are calibrated during full-pipe single-phase flow to obtain zero drift, and real-time temperature and pressure dynamic correction are combined, so that the metering precision and the working condition adaptability are improved; the problem of verification deviation of a traditional flowmeter is solved, high precision and high reliability of complex gas-liquid two-phase flow metering are achieved, and efficient and reliable technical support is provided for two-phase flow precise metering and process control in the fields of chemical engineering, energy and the like.

The invention belongs to the technical field of overflow monitoring and judgment in the petroleum and natural gas drilling process, and discloses an overflow monitoring device and method based on a shaft multiphase flow flowing rule. A simulation switch connected with an overflow simulation device is arranged at the bottom of a simulation shaft, and gas invasion, water invasion and oil invasion can be simulated respectively; electromagnetic flow meters are installed on a wellhead drilling fluid injection manifold and a wellhead drilling fluid return manifold respectively, a liquid level pressure sensor is installed in a mud pit, dynamic change data of the electromagnetic flow meters and the liquid level pressure sensor are monitored and obtained in real time through a monitoring machine and stored, analyzed and processed in real time, and characteristic parameters of different types of overflow are determined. And on the basis, overflow monitoring and judgment are carried out, and theoretical support and guidance are provided for field well control operation. The whole device disclosed by the invention does not monitor underground, does not need expensive hardware equipment, is low in investment and operation and maintenance cost, is not limited by underground complex environmental factors, and can avoid signal transmission power loss and improve the monitoring effect.

The invention discloses an AI-based raw water pretreatment dosing intelligent control system and method, and relates to the technical field of artificial intelligence, and the system comprises a sensor layer, an edge calculation layer, a cloud platform layer and an execution layer. The sensor layer consists of a distributed sensor network, comprises a turbidity meter, a pH electrode, an electromagnetic flowmeter, a COD (Chemical Oxygen Demand) online monitor and a distributed optical fiber temperature measuring device, covers a raw water inlet, a mixing tank and a sedimentation tank node, and transmits a signal to the edge calculation layer through an RS485 bus. According to the raw water pretreatment dosing intelligent control system and method provided by the invention, through multi-modal data fusion and a dynamic prediction model, the water quality of raw water is accurately sensed and predicted, the dosing amount is adjusted in advance, the hysteresis of a coagulation reaction is effectively compensated, the standard reaching rate of the water quality is improved, and by utilizing an NSGA-II multi-target optimization algorithm, the quality of the raw water is effectively improved. The medicament cost and the treatment effect are balanced, excessive dosing of medicaments in a traditional mode is avoided, and the operation cost is reduced.

The invention discloses a non-linear error correction method for an electromagnetic flowmeter based on machine learning. The non-linear error correction method comprises the steps that 1, original monitoring data, working condition parameters and a reference calibration flow value of the electromagnetic flowmeter are collected; 2, performing data preprocessing to obtain a standard feature vector sequence and an original error sequence; 3, performing cycle and trend error feature modeling on the standard feature vector sequence through an improved TimeMixer network; 4, taking the original error sequence as a supervision label, and calculating a joint loss function; 5, designing a double-stage error correction strategy to carry out trend correction and period correction, and generating a corrected flow value sequence; 6, executing physical consistency constraint on the corrected flow value sequence to generate a credible corrected flow value sequence; and step 7, updating the improved TimeMixer network and the credible correction flow value sequence. According to the invention, the measurement precision and the operation stability of the electromagnetic flowmeter under non-linear interference are improved.

The invention discloses a rolled piece temperature control system based on a steel rolling process, which relates to the technical field of steel rolling and comprises a detection module, a control module, an execution module and a cooling module, the detection module comprises infrared thermometer arrays, an ultrasonic thickness gauge, an electromagnetic flowmeter, a pressure transmitter and a thermal resistance thermometer, and the infrared thermometer arrays are used for being arranged in front of and behind a cooling section and respectively collecting initial temperatures before entering a cooling system. Through the self-adaptive PID algorithm, the finite difference heat conduction model and the Smith pre-estimation compensation strategy are combined, the problem of control delay caused by the large lag characteristic in the cooling process is solved, control parameters can be dynamically adjusted according to the rolling speed, the steel grade characteristic and the like, temperature adjustment better fits the actual working condition, and the control precision is improved. The phenomenon of supercooling or insufficient cooling in a traditional control mode is fundamentally avoided, and the uniformity and stability of the performance of rolled pieces are guaranteed.

The invention discloses a liquid metal electromagnetic flowmeter capable of eliminating the influence of an environmental magnetic field and a use method. The flowmeter comprises a flow channel, a magnet exciting coil, a first environment magnetic field eliminating coil, a second environment magnetic field eliminating coil, a first signal receiving coil, a second signal receiving coil and a measuring device. Induced electromotive forces generated by an environment magnetic field on the four induction coils are equal, and the electromotive forces of the elimination coil and the signal receiving coil are superposed and counteracted through a specific connection mode, so that the influence of the environment magnetic field is reduced, and the signal-to-noise ratio is improved. When the flow needs to be measured, firstly measuring the phase difference, then adjusting the frequency to determine the working frequency, obtaining the relationship between the flow velocity and the phase difference, inputting the relational expression, finally measuring the phase difference, performing interpolation calculation to obtain the flow velocity, and calculating the volume and mass flow by combining the geometric parameters of the flow channel and the liquid metal density. The device and the method have the advantages of wide measurement range, high precision, strong applicability and the like, are suitable for various environmental magnetic fields and flow channel sizes, are higher in measurement precision and are stable, and measurement signals are not influenced by corrosion of working media.

The invention relates to the technical field of flow detection, and discloses a pipeline type electromagnetic flowmeter which comprises a mounting pipe body and an electromagnetic flowmeter main body mounted on the mounting pipe body, and further comprises a cylindrical cavity formed in the mounting pipe body, a rotating sleeve is rotationally connected in the cylindrical cavity, the rotating sleeve and the mounting pipe body are coaxially arranged, and the electromagnetic flowmeter main body is arranged in the cylindrical cavity. A rotating assembly for driving the rotating sleeve to rotate is arranged on the mounting pipe body; a partition plate is installed in the rotating sleeve, the partition plate divides the interior of the rotating sleeve into two filtering spaces with semicircular sections, a circular baffle is fixed to the end, close to the electromagnetic flowmeter body, of the rotating sleeve, and a semicircular baffle is fixed to the end, away from the electromagnetic flowmeter body, of the interior of the cylindrical cavity. Through the design of the two filter barrels, when one of the filter barrels is cleaned, shutdown is not needed, water flow filtration and water flow conveying are not affected, and backwashing can be carried out.

The invention relates to the technical field of gate valve control systems, and discloses a pilot gate valve intelligent control system for a hydraulic valve, which comprises a valve body, and the valve body comprises a main valve clack, a hydraulic cavity, a pilot valve assembly, an intelligent control unit, a multi-source sensor, a human-computer interaction interface and a cloud server. According to the pilot gate valve intelligent control system for the hydraulic valve, a valve operation digital mirror image is built through the multi-source sensor set, the pressure sensor captures the pressure difference of a main valve, a reference is provided for water hammer suppression and the like, the electromagnetic flowmeter conducts non-contact measurement and adapts to multiple media, abrasion errors are avoided, and the magnetostriction displacement sensor monitors valve clack micro-motion; the vibration sensor carries out early warning on hidden dangers such as sealing abrasion through three-axis data, the temperature sensor corrects interference of fluid characteristics on control, the five sensors work cooperatively, all-directional monitoring of fluid parameters and mechanical states is achieved, data are accurately input for intelligent control, and efficient and stable operation of the valve is guaranteed.

According to the high-frequency corrosion-resistant pipeline type electromagnetic flowmeter, a first installation area used for installing a high-frequency magnetic field generation assembly is formed between the inner wall of a conductive outer pipe and the outer wall of an insulating inner pipe, and the high-frequency magnetic field generation assembly is not attached to the conductive outer pipe and the insulating inner pipe; when the wear-resistant lining and the insulating inner pipe are damaged to cause seepage of a corrosive medium, the high-frequency magnetic field generation assembly can be prevented from being corroded by the seeping corrosive medium; an isolation shell is arranged in the second installation area, a groove is formed in the end, facing the measurement channel, of the isolation shell, a through hole is formed in the bottom wall of the groove, a ceramic membrane used for sealing the through hole is arranged in the groove, the surface, facing the measurement channel, of the ceramic membrane is flush with the inner wall of the corrosion-resistant lining, and inert conductive liquid is arranged in the isolation shell. The electrode assembly comprises two measuring electrodes which are correspondingly soaked in the isolation shell, and the ceramic membrane prevents a corrosive medium in the to-be-measured liquid from entering the isolation shell, so that the measuring electrodes are prevented from being corroded.

The utility model relates to an ultrahigh frequency resonance excitation low power consumption electromagnetic flowmeter and a special chip thereof, a sensor core is installed in a sensor core waterproof box, the sensor core waterproof box is installed at the middle position of a sensor core support, and the sensor core waterproof box divides a measuring pipeline in the sensor core support into two parts. Signal processing PCBs are installed on the front face and the back face of the sensor core support respectively, special chips are arranged in the two signal processing PCBs respectively, and the sensor core support is installed in a metal pipeline. According to the utility model, the purpose of reducing power consumption is realized by shortening the excitation time and forming resonance by using inductance and capacitance of the excitation coil; and the excitation coil and the measurement electrode are manufactured by adopting the multi-layer PCB, so that the manufacturing cost is greatly reduced.

The invention relates to the technical field of fluid measuring equipment detection, in particular to electromagnetic flowmeter sealing performance testing equipment which comprises a base, a mounting cover and a control console are sequentially arranged at the top of the base from left to right, a front opening is formed in the front side of the mounting cover, and a mounting assembly used for mounting a testing pipeline is arranged at the bottom of the mounting cover. An abutting assembly is installed on the top of the installation cover, and a vibration mechanism for testing the dynamic sealing performance of the electromagnetic flowmeter is installed on the side wall of the installation cover. According to the invention, closing and pressurization of the electromagnetic flowmeter and the test pipeline are completed through the mounting assembly and the pressing assembly, and accurate detection of static sealing performance is realized; meanwhile, the side wall of the electromagnetic flowmeter is subjected to multi-angle dynamic knocking through the vibration mechanism, the vibration environment in the actual working condition is simulated, and the air pressure fluctuation is continuously observed, so that the dynamic sealing performance is comprehensively evaluated, the test content is more comprehensive through the static and dynamic combined test mode, and the result has more practical significance.

The electromagnetic flowmeter comprises a shell and a sphere, connecting pipes are fixedly connected to the two ends of the surface of the shell, first connecting flanges are fixedly connected to the ends, away from each other, of the two connecting pipes, a fixing cylinder is fixedly connected to the center of the top of the shell, and a second connecting flange is fixedly connected to the top end of the fixing cylinder; the sphere is rotationally connected to the center in the shell, a communicating groove is horizontally formed in the shell in a penetrating mode, a rotating mechanism for rotating the sphere is arranged in the shell, and indicating mechanisms are arranged on the two symmetrical sides of the surface of the shell. Through the arrangement of the ball body, the magnetic field coil can be conveniently placed during use, meanwhile, the magnetic field coil can be conveniently protected, and in the use process, the ball body can be rotated to facilitate connection and disconnection of fluid in the shell, so that the use effect of the device is improved, and meanwhile, a rotating disc can be driven to rotate; the flow direction of the fluid of the device can be facilitated through the indicating arrow arranged on the surface of the turntable, and the mounting convenience of the device is improved.

The invention relates to the technical field of electromagnetic flow meters, in particular to an electromagnetic flow meter which comprises a flow meter shell and a switchable induction inner core, the flow meter shell comprises an outer sleeve shell, the switchable induction inner core comprises a measuring inner pipe, the measuring inner pipe is installed on the inner side of the outer sleeve shell, and the outer sleeve shell is installed on the inner side of the measuring inner pipe. The outer sleeve is fixedly installed on the outer wall of the measuring inner pipe, the two ends of the outer wall of the outer sleeve are each provided with a pair of telescopic induction electrodes, and a rotary excitation coil is installed on the outer wall of the outer sleeve in a sliding mode. When the conditions of fluid layering, electrode surface scaling or fluid turbulence are detected, only the rotary excitation coil needs to be controlled to slide to the other end of the outer sleeve, the telescopic induction electrode at the other end is pressed and triggered at the same time, and the detection positions of the excitation coil and the induction electrode are changed, so that the effect of cleaning the induction electrode is achieved.

The utility model provides an electromagnetic flowmeter sensor which comprises a flow guide pipe assembly, a flow guide pipe, a flow guide pipe, a flow guide pipe, a flow guide pipe and a flow guide pipe assembly, wherein the flow guide pipe assembly is internally provided with a flow guide cavity; the shell is arranged outside the flow guide pipe assembly in a sleeving manner; the two coils are arranged on the inner wall of the shell; the electrode penetrates through the wall surface of the flow guide pipe assembly, and one end of the electrode extends into the flow guide cavity and is used for being in contact with a to-be-detected medium; the converter connecting assembly is arranged on the shell; the coil is connected with the converter connecting assembly through the first lead; the electrode is connected with the converter connecting assembly through the second lead; and the two ends of the shell are respectively connected with one flange. The coil is installed on the shell, the weight borne by the flow guide pipe can be reduced, the wall thickness of the flow guide pipe is reduced, cost is reduced, the first lead and the second lead are connected with the converter through the converter connecting assembly, and reliable connection of the leads can be achieved.

The invention relates to the technical field of sediment and bubble monitoring, in particular to a sediment and bubble concentration monitoring device and method.The sediment and bubble concentration monitoring device comprises a laser transmitter, a light sensor, a light coupler, a light transmitting piece, an image obtaining device and a beam splitter, and further comprises an electromagnetic flowmeter and a detector which are arranged on a pipeline module; the laser transmitter, the spectroscope and the image acquisition device are placed at fixed positions in the shell so as to shoot silt and gas particles in the flowing pipeline, and then data are transmitted to the processor; a processor calculates the concentration of sediment and bubbles in a pipeline through data preprocessing of a k-Mean clustering algorithm, median filtering and connected domain analysis and a CNN convolutional neural network algorithm, and in the prior art, only the sediment concentration can be measured, but the concentration of gas cannot be monitored at the same time. According to the invention, the content of silt and gas and the influence on hydraulic machinery can be monitored at the same time, timely early warning is provided, and the operation efficiency and safety of equipment are effectively improved.

The invention relates to the field of water-saving processes, and discloses a water-saving process water balance management system which comprises a central water supply module which is linked with a pipe network pressure sensor through an adjustable pump station, predicts a water demand based on an LSTM algorithm according to an analysis result of an intelligent control system, and dynamically adjusts the power of the pump station; the regional water supply module is provided with industrial, agricultural and urban life special pipe networks, each pipe network is provided with an electromagnetic flowmeter and an electric control valve, transmission energy consumption is reduced through a pipe network pressure gradient control technology, and real-time data of each pipe network is fed back to the intelligent control system. The water demand is predicted through the central water supply module based on the LSTM algorithm, the pump station power is dynamically adjusted in combination with a pipe network pressure sensor, meanwhile, the regional water supply module utilizes the pipe network pressure gradient control technology and real-time data feedback, the problems of water supply amount and uneven water pressure distribution are effectively solved, and the water resource utilization rate is increased.

The invention discloses an elastic city rainwater garden layout optimization method and system self-adaptive to climate change, and relates to the technical field of sponge city drainage optimization. Multi-dimensional data are collected in real time through an ultrasonic liquid level sensor, an electromagnetic flowmeter and a meteorological radar, a physical model is constructed, and a weighted flow value is generated in combination with LSTM; intelligent prediction under the constraint of the physical law is achieved, threshold matching and deviation correction are conducted based on the weighted flow value, and the pipe diameter adjusting amount is calculated; and constructing a three-color matrix execution feedback strategy containing prediction precision, drainage efficiency and equipment loss. The problems that a traditional scheme is poor in dynamic adaptability, single in model and free of closed-loop feedback are solved, and the elasticity of a drainage system to cope with climate changes is improved.

The utility model is applicable to the technical field of electromagnetic flow meters, and provides an electromagnetic flow meter beneficial to descaling, which comprises a measuring tube and a shell sleeved on the measuring tube, an electromagnetic measuring mechanism used for detecting the internal flow of the measuring tube is arranged on the shell, an accommodating groove is arranged on the inner wall of the measuring tube, and the accommodating groove is communicated with the measuring tube. The two sides of the containing groove extend out of the left side and the right side of the shell respectively, a built-in scraping plate matched with the containing groove is arranged in the containing groove, the built-in scraping plate and the containing groove are arranged to be in an isosceles triangle shape, and a control mechanism used for controlling the built-in scraping plate to slide in the measuring pipe is arranged on the measuring pipe. According to the device, the problem that a measuring circuit is disconnected due to the fact that scale attached to the surface of the electrode is insulated is avoided as much as possible, the measuring precision of the electromagnetic flowmeter during working is guaranteed, and meanwhile when the electromagnetic flowmeter is not used, the built-in scraper is contracted into the containing groove and does not affect flowing of liquid in the measuring pipe; and the fluid flow measurement accuracy of the electromagnetic flowmeter is ensured.

The utility model relates to a corrosion-resistant electromagnetic flowmeter. Two ends of the measuring pipeline are respectively provided with a left-end flange and a right-end flange, the measuring pipeline, the left-end flange and the right-end flange are made of engineering plastics and are of an integrated injection molding structure, and an upper measuring electrode and a lower measuring electrode which are longitudinally opposite are arranged in the middle of the top wall and the middle of the bottom wall of the measuring pipeline; the device further comprises a front shell and a rear shell which clamp the measuring pipeline in the middle, coil supports are arranged in the front shell and the rear shell, excitation coils are installed on the coil supports, and the two excitation coils are located in front of the middle of the measuring pipeline and behind the middle of the measuring pipeline respectively. A front half flange plate is arranged at the top of the front shell, a rear half flange plate is arranged at the top of the rear shell, the front half flange plate and the rear half flange plate form a top flange when the front shell and the rear shell are assembled in a butt joint mode, the gauge head is provided with a display screen in the front and a gauge head support at the bottom, and the bottom of the gauge head support is fixedly connected with the top flange. According to the corrosion-resistant electromagnetic flowmeter, the corrosion-resistant capacity is improved on the basis that the structural characteristics of the flowmeter body are guaranteed.

The utility model discloses a testing device for a constant flow valve, which comprises a water pump, a check valve, a hose, a first manual regulating valve, a second manual regulating valve, a third manual regulating valve, an electromagnetic flowmeter, a pressure difference transmitter, the constant flow valve and a water tank, the other end of the hose is connected with the water inlet end of a check valve, the water outlet end of the check valve is provided with a third water pipe connected with one end of a first manual adjusting valve, and the third water pipe is provided with a first pipe connector connected with one end of a second manual adjusting valve. A fifth water pipe connected with one end of an electromagnetic flowmeter is arranged at the other end of the first manual regulating valve, and a sixth water pipe connected with one end of a constant flow valve is arranged at the other end of the electromagnetic flowmeter. By means of the mode, the testing device of the constant flow valve achieves testing of performance of the constant flow valve under different pressure difference conditions, and ensures accuracy of testing results.

The invention belongs to the technical field of electromagnetic flow meters, and particularly relates to an anti-blocking intelligent electromagnetic flow meter. Comprising a converter arranged on the upper side of a shell, a first lining and a second lining, the first lining and the second lining are arranged in the shell, a sensor is installed on the first lining, and the first lining is rotationally connected with a flow guide ring; the flow guide ring is provided with a flow guide face and a plurality of first filtering holes. The solid particles are guided to the axis of the first lining through the flow guide surface, so that the solid particles in the two-phase flow are far away from the inner wall of the first lining, and the probability that the position, close to the sensor, of the inner wall of the first lining is scratched by the solid particles in the two-phase flow is reduced in the long-term use process; the surface smoothness of the inner wall, close to the sensor, of the first lining is guaranteed, so that the probability that solid particles are attached and accumulated in the position, close to the sensor, of the first lining and even cause blockage is reduced, and the accuracy of two-phase flow monitoring by the sensor is guaranteed.

The embodiment of the present application provides a flow calculation method, device, electronic device and storage medium. The method includes: calculating the difference between the observed value and the predicted value of the electromagnetic flowmeter at the target moment as the residual corresponding to the target moment; calculating the degree of discreteness between the residual corresponding to the target moment and the residual corresponding to each same-window moment as the residual fluctuation corresponding to the target moment, wherein the same-window moment is other moments in the same time window as the target moment; taking the first weight as the weight of the observed value at the target moment and the second weight as the weight of the predicted value at the target moment, performing weighted summation on the observed value and the predicted value at the target moment to obtain the calculated value at the target moment, wherein the first weight is positively correlated with the residual fluctuation corresponding to the target moment, and the second weight is negatively correlated with the residual fluctuation corresponding to the target moment. Applying the embodiment of the present application can improve the accuracy of flow calculation.

The utility model relates to the technical field of pipeline flow metering equipment, in particular to a pipeline type electromagnetic flowmeter which comprises a measuring pipe, a lining arranged in the measuring pipe and a meter head arranged on the measuring pipe, two shells of semi-circular ring structures are arranged on the measuring pipe in a sleeved mode, and a first bolt is arranged between the two shells. The two shells are connected through a first bolt, limiting rings are arranged in the two shells, one sides of the limiting rings are installed on the inner walls of the shells, magnet exciting coils are arranged in the limiting rings in a sleeved mode, the two sides of the magnet exciting coils make contact with the shells and the measuring tube respectively, two electrodes are arranged between the two shells and located on the two sides of the shells respectively, and the two electrodes are arranged on the two sides of the shells respectively. The two sides of the two shells are each provided with a sleeve hole of a semicircular structure, the sleeve holes are located in the edges of the shells, and the electrodes are clamped in the sleeve holes. The utility model provides a pipeline type electromagnetic flowmeter which is convenient to maintain an assembled electrode and a magnet exciting coil, reduces interference on the magnet exciting coil, and is used for overcoming the defects in the prior art.

The invention relates to the technical field of oil field oil production engineering, in particular to an underground data acquisition unit with flow, pressure and temperature monitoring functions and a method. The method is suitable for underground working condition monitoring of submersible motor type lifting equipment such as submersible screw pumps, submersible plunger pumps and submersible centrifugal pumps. The unit comprises a pressure-resistant shell, wherein a central pipe, an electromagnetic flowmeter, two pressure and temperature sensors and an underground parameter collector are integrated in the pressure-resistant shell; the two sensors are used for measuring the temperature and pressure of liquid flow of the central pipe and the temperature and pressure of an oil casing annulus respectively; the electromagnetic flowmeter measures the flow, and real-time temperature and pressure data are used for compensation to improve the precision. The unit is further provided with a collecting pipe, an upper end, a lower end, a connecting sliding ring, an annulus / oil pipe inner testing channel, a sealing rubber ring and the like. Through the integrated design, synchronous high-precision in-situ monitoring of underground key parameters is achieved, the problem that underground data of multiple instruments are not synchronous is solved, and a reliable data terminal is provided for an intelligent oil field.

The invention provides a drilling fluid flow monitoring device and method suitable for a mud runway, relates to the field of petroleum drilling ground testing instruments, and solves the problem that an existing monitoring method is low in overflow prediction precision and cannot find overflow in time. The device comprises a flow measuring unit (1), and the left side and the right side of the flow measuring unit (1) are connected with a flow guide unit (2) and a flow blocking unit (4) through flange plates respectively. The upper part of the diversion unit (2) is connected with the video monitoring unit (3); the flow measuring unit (1) is an electromagnetic flowmeter and is used for measuring the outlet displacement; the flow guide unit (2) is used for guiding drilling fluid to flow to the flow meter; and the flow choking unit (4) is used for controlling stable flow of the drilling fluid. According to the drilling fluid flow monitoring device suitable for the mud runway, real-time accurate monitoring of the flow of a drilling fluid outlet can be achieved, then monitoring of overflow and leakage of the drilling fluid is achieved, and well control safety is ensured.

The utility model relates to electromagnetic flowmeter technical field, the utility model discloses a kind of electromagnetic flowmeter transmitter with temperature measurement, including through power supply circuit and signal isolation circuit connection control circuit and signal processing circuit, the signal processing circuit includes the wiring terminal J8 of realizing multiple wiring mode;Based on the selective connection temperature sensor of wiring terminal J8, temperature signal is connected to the input end of operational amplifier UT1A by analog switch U18 output, based on the input end of analog-digital converter U19 connected to the output end of operational amplifier UT1A;The control pin of analog-digital converter U19 is connected to control circuit, for controlling the collection and transmission of data, the utility model is through integrated multifunction and flexible measurement mode, high precision, high flexibility, low cost, high reliability and strong anti-interference ability are realized, the efficiency and performance of industrial measurement system are significantly improved.

The high-frequency electromagnetic flowmeter comprises an electromagnetic flow converter and an electromagnetic flow sensor, the electromagnetic flow converter is electrically connected with the electromagnetic flow sensor, and the electromagnetic flow converter comprises an A / D analog-to-digital converter, a differential amplifier, a single-chip microcomputer, an electronic switch group and a direct-current constant-current source. The electromagnetic flow sensor comprises a measuring conduit, a measuring electrode, a magnetic conductive piece, a temperature sensor and a magnet exciting coil; according to the electromagnetic flowmeter, the high-frequency three-valued rectangular wave is adopted as excitation current, a flow signal with the sampling frequency one time higher than the excitation frequency is generated through induction, and therefore the noise interference restraining capacity of the electromagnetic flowmeter is improved; by adopting a technical measure which is the same as that of suppressing power frequency interference by low-frequency rectangular waves, the purposes of amplifying flow signals and suppressing power frequency series mode interference and common mode interference are achieved, and the production cost is reduced; the temperature sensor is additionally arranged in the electromagnetic flow sensor, so that the high-frequency electromagnetic flow meter can compensate and correct measurement errors caused by temperature changes.