415 results about "Electromagnetic flow" patented technology

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 relates to the technical field of electromagnetic flowmeter grinding, in particular to a grinding device for electromagnetic flowmeter machining. The device comprises a machine tool base, a grinding mechanism is arranged on the upper side of the machine tool base, a plurality of grinding belts are arranged on the grinding mechanism, a moving device is arranged on one side of the grinding mechanism, the moving device moves on the upper side of the machine tool base, and an electromagnetic flowmeter tube is arranged on the moving device. In the process that the grinding mechanism is inserted into the electromagnetic flow meter tube, the end grinding piece drives the grinding belt to enter the electromagnetic flow meter tube, so that the inner wall of the electromagnetic flow meter tube is ground at the position, with few meshes, on the grinding belt, and large particles on the inner wall of the electromagnetic flow meter tube are ground away; and meanwhile, in the process that the grinding mechanism grinds the electromagnetic flowmeter pipe, the spirally arranged end grinding piece guides chippings ground by the grinding belt in the direction away from the grinding mechanism, and the chippings are rapidly discharged from the interior of the electromagnetic flowmeter pipe.

The embodiment of the invention provides a signal processing method and device and electronic equipment. In the embodiment of the invention, when the original voltage information collected by the electromagnetic flow monitoring equipment is obtained, the bias voltage correction is carried out on each piece of original voltage information to eliminate the voltage bias interference, and the peak interference elimination is carried out by identifying the abnormal sampling point with the peak noise. Voltage information under different sampling points is filtered to eliminate noise interference information except voltage information matched with output signal characteristics of the electromagnetic flow monitoring equipment, and on the basis, voltage information corresponding to a target sampling point in a set range and a standard voltage signal are subjected to cross-correlation, so that the output signal characteristics of the electromagnetic flow monitoring equipment are improved. The effective voltage information is extracted to be used for fluid characteristic measurement of the measured object, so that a large amount of noise interference in the collected original voltage information is effectively inhibited, and the accuracy of a measurement result output by the electromagnetic flow monitoring equipment, namely the fluid characteristics, is improved.

The invention discloses a wireless transmission flowmeter which comprises a main pipe, an electromagnetic flowmeter assembly, a wireless transmission assembly, a turbine flowmeter assembly, a second branch pipe, a first valve, a second valve, a mounting plate, a third flange, a first bolt set, a fourth flange and a second bolt set. A wireless transmission function is designed, real-time wireless connection of flow meter data is achieved through the wireless transmission assembly, the flow meter data is uploaded to a system platform, a worker can remotely monitor the flow data in real time, the working efficiency is greatly improved, the labor cost and the maintenance complexity are remarkably reduced, and the working efficiency is improved. The flow monitoring and management become more efficient and intelligent, the electromagnetic flow meter assembly and the turbine flow meter assembly are integrated, a flexible and changeable flow monitoring system is constructed, and according to the characteristics of fluid in a pipeline, such as the conductivity, the viscosity, the impurity content and the temperature, the most suitable flow meter can be switched to carry out accurate measurement according to the characteristics, such as the conductivity, the viscosity, the impurity content and the temperature, of the fluid in the pipeline.

The utility model discloses a mounting assembly of a non-full pipe electromagnetic flowmeter, which comprises an electromagnetic flowmeter, two sides of the electromagnetic flowmeter are both communicated with first pipelines, one sides of the two first pipelines far away from each other are both provided with second pipelines, and an adjusting device is arranged between the tops of the first pipelines and the second pipelines. The adjusting device comprises an inserting rod, a connecting piece, a spring, a supporting rod, a disc, a communicating pipeline and a pull ring. The utility model relates to the technical field of a mounting assembly of a non-full-pipe electromagnetic flowmeter, which is characterized in that through the matching among a communicating pipeline, a connecting piece and a spring, when the non-full-pipe electromagnetic flowmeter needs to be mounted, the length of the electromagnetic flowmeter can be adjusted according to the distance between pipelines, a pull ring is pulled firstly, the connecting piece is pulled up and the spring is compressed simultaneously, and then the non-full-pipe electromagnetic flowmeter is mounted. The length of the electromagnetic flowmeter is adjusted, the pull ring is loosened after the electromagnetic flowmeter is adjusted to a proper length, the insertion rod can be inserted into the grooves of the first pipeline and the second pipeline under the action of the spring, and the communication pipeline is fixed.

The invention discloses a high-overload distribution transformer design method based on geometric dimension reduction and multi-objective optimization, and the method comprises the steps: simplifying the three-dimensional structure of a transformer based on the axial symmetry characteristics of the transformer, building a two-dimensional axial symmetry model, and reserving the key geometric characteristics of an iron core, a winding and transformer oil; based on the two-dimensional axisymmetric model, constructing an electromagnetic-flow-heat multi-physics field coupling simulation model, calculating electromagnetic field distribution, and simulating oil flow and temperature field distribution in the transformer; based on the finite element simulation data and an improved four-vector multi-objective optimization algorithm, establishing a multi-objective optimization model, carrying out collaborative optimization on transformer structure parameters, and outputting a Pareto optimal solution set; and determining an optimal design scheme of the electromagnetic structure of the transformer according to the Pareto optimal solution set. Through the improved four-vector multi-objective optimization algorithm, the local development and global exploration capabilities are comprehensively improved, and the accuracy and diversity of the optimization scheme are improved.

An electromagnetic flow control method for reducing inclusions in a small-size cast billet. During continuous casting of the small-size cast billet, an electromagnetic stirring device having a Z-direction electromagnetic force is provided at a mold (3) and is capable of controlling the flow of molten steel in the mold, and carrying out Z-direction acceleration on a peripheral region of the molten steel while promoting circumferential rotational stirring of the molten steel in the mold. The method can reduce the impingement depth of the molten steel from a submerged entry nozzle in the mold, thereby having positive effects on promoting the flotation of the inclusions and improving the quality of the cast billet.

The application discloses a pipe jacking construction grouting control method and belongs to the technical field of pipe jacking construction. The purpose is to provide accurate control for the grouting technology in pipe jacking construction. According to the density of stratum, the grouting amount is monitored and controlled in real time through flow meter monitoring and electric switch control. Meanwhile, the grouting holes are arranged along the ring direction on different grouting sections in the pipe jacking direction, so that the grouting can penetrate the whole section, and the wrapping of grouting on the whole pipe jacking section is improved. A plurality of uniformly distributed grouting holes are arranged on the pipe wall of the prefabricated pipe section along the ring direction. A one-way valve is arranged at the outer end of the grouting hole, and a joint for connecting a grouting branch pipe is arranged at the inner end of the grouting hole. A total electromagnetic flow meter, a total electromagnetic pressure gauge and a total electromagnetic ball valve are connected to the grouting main pipe. A branch pipe electromagnetic flow meter, a branch pipe electromagnetic pressure gauge and a branch pipe electromagnetic ball valve are respectively connected to each grouting branch pipe. A plurality of vibration exciters and vibration sensors are fixed on the inner wall of the prefabricated pipe section along the ring direction.

In the system, an electromagnetic simulation module establishes a transformer three-dimensional electromagnetic field model based on a finite element method, and calculates magnetic field distribution, winding eddy current loss and iron core hysteresis loss to obtain loss data; the fluid-solid coupling calculation module is connected with the electromagnetic simulation module so as to simulate a transformer oil flowing and heat conduction process based on computational fluid dynamics; the optimization design module is connected with the fluid-solid coupling calculation module so as to perform parametric modeling and optimization on the winding structure, the cooling channel and the cooling fin layout through the hot spot position and temperature distribution based on a multi-target genetic algorithm and an agent model; the state evaluation and heat dissipation adjustment module is connected with the data interaction layer so as to analyze the health state of the transformer based on sensor data and simulation results, predict the hot-spot temperature trend and dynamically adjust operation parameters of the cooling system through a self-adaptive heat dissipation adjustment algorithm.

According to the slab continuous casting water gap electromagnetic flow control device and method, static magnetic fields are arranged on the outer side of a slab continuous casting submersed water gap above a molten steel meniscus in a slab continuous casting crystallizer, and the arrangement modes of the static magnetic fields include the single magnetic field mode and the double magnetic field mode; in the single magnetic field form, a static magnetic field is perpendicular to the center line of the submersed nozzle, namely the static magnetic field is perpendicular to the gravity action direction; the static magnetic field is generated by at least two magnetic field generators which are arranged on the two sides of the submersed nozzle and distributed in an axial symmetry mode. The magnetic field generator is of an annular structure and surrounds the submersed nozzle and the magnetic field generator by a circle; the static magnetic field is perpendicular to the center line of the submersed nozzle, namely the static magnetic field is perpendicular to the gravity action direction; the static magnetic field is generated by at least two magnetic field generators which are arranged on the two sides of the submersed nozzle and distributed in an axial symmetry mode. The static magnetic field forms a closed loop after passing through the two C-shaped magnet yokes, and the C-shaped magnet yokes are symmetrically arranged along the submersed nozzle axis. And the C-shaped magnet yoke is made of a magnetic conductive material.

The invention relates to the field of tunnel surrounding rock fracture reinforcement and oil and gas development, and provides a particle migration simulation device and method considering graded confining pressure and a fracture network morphology. The device comprises a stirring tank, a feeding machine, a screw pump and a fracture module, and the output end of the feeding machine is connected with an inlet of the stirring tank; the outlet of the stirring tank is connected with the input end of the screw pump through a control valve, the output end of the screw pump is connected with the inlets of the crack modules through the first electromagnetic flow meter, a gate valve is arranged between each crack module inlet and the first electromagnetic flow meter, and the outlet of each crack module is connected with the waste liquid tank through the second electromagnetic flow meter; the crack module comprises four sub-modules, namely a general crack module, a variable-crack-width crack module, a rough crack module and a closed crack module, and each sub-module is provided with a camera. According to the method, the more accurate migration rule of the particle material in the crack can be obtained, a particle slurry pumping scheme can be better designed in actual engineering production, and the production cost is reduced.

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 discloses an electromagnetic flowmeter with a moisture-proof sealing connecting structure, which comprises an electromagnetic flowmeter body, connecting pipelines are symmetrically arranged below two sides of the electromagnetic flowmeter body, and connecting flanges are arranged at joints of the two connecting pipelines and the electromagnetic flowmeter body. Sealing rings are arranged on the inner sides of the two connecting flanges, a plurality of fixing screws are connected to the interiors of the connecting flanges in a matched mode, fixing nuts are connected to one sides of the exteriors of the fixing screws in a threaded mode, and positioning assemblies are arranged on the exteriors of the fixing screws and the exteriors of the fixing nuts. The positioning assembly is arranged outside the fixing screws and the fixing nuts, so that the positioning frame is convenient to disassemble and assemble while stable installation of the connecting pipeline and the electromagnetic flow meter body is guaranteed, the operation convenience is improved, the fixing screws and the fixing nuts can be sealed, threads are prevented from being corroded, follow-up disassembly difficulty is avoided, and the service life of the electromagnetic flow meter is prolonged. And the practicability is improved.

The invention discloses a switch cabinet condensation mechanism analysis method based on a multi-physical coupling field and a fractal theory, and the method comprises the steps: building a three-dimensional simulation model of a switch cabinet based on a solidworks environment; based on electromagnetic-flow-heat-wet coupling field simulation, judging parts easy to damp and condense; establishing a prediction model of condensation distribution in the switch cabinet based on a fractal theory; analyzing the condensation development process of the edge extraction condensation image based on an improved morphological method; the condensation development sequence of insulating parts in the switch cabinet is determined by simulating the diffusion process of wet air in the switch cabinet on the basis of multiple physical fields, the method is simple in principle, the parts, prone to generating condensation, in the switch cabinet can be accurately positioned, and the generation and development process of the condensation can be clearly analyzed and predicted.

The invention discloses an automatic mixing control device for natural rubber latex and acid liquor. The device is provided with a latex pool (1) and an acid liquor pool (2), a latex pipeline (3) is connected below the latex pool (1), an electromagnetic valve (4) is arranged on the latex pipeline (3), and an electromagnetic flowmeter (6) is arranged at the rear part of the electromagnetic valve (4). An acid liquor pipeline (10) is connected below the acid liquor pool (2), an electric control valve (11) is arranged on the acid liquor pipeline (10), and a turbine flowmeter (13) is arranged at the rear end of the electric control valve (11). The tail ends of the latex pipeline (3) and the acid liquor pipeline (10) are provided with a glue-acid mixing pool (16), a glue-acid mixing pipeline (17) is arranged behind the glue-acid mixing pool pipeline (16), and the tail end of the glue-acid mixing pipeline (17) is provided with a PH value measuring probe (19) and a PH value measuring instrument (18). The device has the beneficial effects that the automation of the latex solidification acid preparation process is realized, the labor cost is reduced, the production efficiency is improved, and the stability of the product quality is ensured.

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 utility model discloses a caustic soda dosing system which comprises a stock solution pool, a dilution tank, a first water ejector and a second water ejector, the stock solution pool is connected with a chemical inlet through a first connecting pipe, and a water inlet of the first water ejector is connected with pressure water through a second connecting pipe. A liquid inlet of the first water ejector is connected with the stock solution pool through a third connecting pipe, a water outlet of the first water ejector is connected with the dilution tank through a fourth connecting pipe, a water inlet of the second water ejector is connected with pressure water through a fifth connecting pipe, a liquid inlet of the second water ejector is connected with the dilution tank through a sixth connecting pipe, and a water outlet of the third water ejector is connected with the third connecting pipe. A water outlet of the second water ejector is connected with a feeding point through a seventh connecting pipe, and the sixth connecting pipe is sequentially provided with an electromagnetic flow meter and a rotor flow meter. The device is simple in structure, high in feeding efficiency, accurate in metering, accurate in feeding and accurate in control of the pH value of factory water, improves the pH stability of the factory water, ensures the safety of water quality, and meets the requirements of batch water treatment.

The utility model relates to the field of flow meters, and discloses an anti-blocking electromagnetic flow meter. A positioning flange is welded to the outer surface of one side of the main pipeline, a fixing flange is movably connected to the outer surface of the end, away from the main pipeline, of the positioning flange, a bolt is arranged on the outer surface of the fixing flange, a desilting pipe is movably connected to the inner surface of the bolt, a push rod is welded to the outer surface of the desilting pipe, and a fixing groove is movably connected to the outer surface, corresponding to the push rod, of the desilting pipe. The main pipeline of the device provides the function of an electromagnetic flowmeter body, the positioning flange and the fixing flange are fixed through bolts, the fixing groove is fixed to the supporting table, displacement of the dredging pipe is limited, it is guaranteed that the dredging pipe only moves front and back in the inner wall of the corresponding pipeline of the main pipeline, and the dredging pipe can move front and back through the push rod; the outer surface, corresponding to the main pipeline, of the desilting pipe is cut in a knife edge shape to separate impurities from the inner surface of the main pipeline, the desilting effect is achieved under the condition that the pipeline is not opened, operation can be conducted during normal maintenance, and cleanliness of the interior of the pipeline is guaranteed.

The utility model belongs to the technical field of vending machines, and particularly relates to a hydrogen-rich water vending machine which comprises a cabinet body, a control system, a hydrogen production machine, a water-hydrogen mixing system, a water supply system, a pressure storage tank, an electromagnetic flow valve and an output pipe. The control system is arranged on the outer side of the cabinet body and comprises a control panel; the hydrogen production machine, the water-hydrogen mixing system, the water supply system, the pressure storage tank and the electromagnetic flow valve are arranged in the cabinet body; the water-hydrogen mixing system comprises two input ports and an output port, the water supply system is connected with one input port through a pipeline, the hydrogen production machine is connected with the other input port through a pipeline, the output port is connected with the storage tank through a pipeline, one end of the electromagnetic flow valve is connected with the pressure storage tank, and the other end of the electromagnetic flow valve is connected with the output pipe; the electromagnetic flow valve is opened, and the water in the pressure storage tank is output from the output pipe under the pressure of the water.

The invention discloses an intelligent normal-pressure long-time coal seam gas content measuring device and method.An outer thread is arranged on the inner wall of the top of a tank body of the measuring device, an inner thread meshed with the outer thread is arranged on the inner wall of the bottom of a tank cover, and the tank cover is detachably connected with the tank body through meshing of the outer thread and the inner thread; an isolation plate is arranged above the internal thread of the tank cover, a mounting cavity is formed between the upper part of the isolation plate and the inner wall of the top of the tank cover, and each module is arranged in the mounting cavity; wherein the gas flow measuring module comprises a first electromagnetic flowmeter, a second electromagnetic flowmeter and a third electromagnetic flowmeter which are connected in parallel, and the measuring range of the first electromagnetic flowmeter is larger than the measuring range of the second electromagnetic flowmeter and smaller than the measuring range of the third electromagnetic flowmeter. According to the measuring device, heavy matching tools do not need to be carried, tedious operation steps are avoided, the working intensity is greatly reduced, and the technical problems that an existing measuring device and method are large in gas content error, high in working intensity and serious in device gas leakage are solved.

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.

The invention discloses an electromagnetic flowmeter flow prediction method based on magnetic sensor identification analysis, and relates to the technical field of electromagnetic flow measurement, and the method comprises the steps: collecting a magnetic field intensity signal in real time, modulating an excitation coil based on a high-frequency pulse to generate an alternating magnetic field, and outputting an original magnetic field signal matrix containing space-time information; the flow velocity field predicted value and the attention weight vector are jointly optimized through a gradient propagation algorithm to minimize the mean square error of the predicted flow velocity and the ultrasonic Doppler reference value, and a calibrated flow value is output; and calculating a real-time confidence score based on the calibrated flow value, and when the score is lower than a preset threshold, performing online fine tuning on the attention weight vector by using an elastic weight consolidation algorithm, and outputting an anti-interference flow prediction result. The differential Maxwell equation constraint is embedded, the flow velocity field and the material parameters are optimized in a combined mode, and dual verification of the measurement result of the electromagnetic flowmeter on the aspects of data precision and physical rules is achieved.

The utility model provides an unpowered immersed ultramicro-filtration water production system, which is characterized by comprising a membrane tank and a water production tank, a water production pipe is arranged between the membrane tank and the water production tank, a water inlet and a water outlet are arranged on the water production pipe, effluent of the membrane tank is connected to the water production tank through the water production pipe, and the water production tank is connected with the membrane tank through the water production pipe. An electromagnetic flowmeter, a negative pressure meter and an electric control valve are sequentially arranged on the water production pipe in the water production direction; a membrane frame is arranged in the membrane tank, and a baffle is arranged at the bottom of the water producing tank; and liquid level meters are arranged above the inner walls of the membrane tank and the water producing tank. The liquid level difference between the membrane tank and the water inlet of the water production pipe is utilized, and water production of the system is automatically realized through siphoning, so that the device is simple in structure and low in energy consumption, and the operation cost is saved. Meanwhile, automatic and stable water production of the device is realized through automatic program linkage.

The invention is suitable for the technical field of flow meters, and provides a magnetic conduction impurity removal device for an electromagnetic flow meter and a using method of the magnetic conduction impurity removal device. The adsorption assembly comprises a base cylinder, a first vertical plate, a stepping motor, an adsorption disc, a second vertical plate, a fixing shaft, a miniature telescopic rod and a magnetic attraction piece. The bubble removing assembly comprises a bubble removing box, a bubble removing pipe arranged in the bubble removing box, a sealing plate arranged in the bubble removing box, a movable rod arranged at one end of the sealing plate, a floating plate arranged below the movable rod and a spring arranged on the bubble removing pipe and the movable rod in a sleeving mode. The magnetic impurities passing through the adsorption disc are adsorbed through the magnetic adsorption piece, so that the magnetic impurities are adsorbed on the surface of a certain part of the adsorption disc; therefore, the measurement precision of the electromagnetic flowmeter is improved.

The invention discloses an electromagnetic networking flow measurement system which solves the problems that an existing radar flow meter is prone to being interfered by wind power, an ultrasonic flow meter is complex to install and debug and prone to being influenced by water flow impurities, and a single ultrasonic flow meter is low in precision. The system comprises a radar water level gauge, an electromagnetic flowmeter host, a connecting cable, an electromagnetic flow velocity sensor, a vertical rod and a water storage structure, three electromagnetic flow velocity sensors are arranged in the water storage structure, a connecting cable is electrically connected with the sensors and a host, and a model algorithm is arranged in the host. Multiple electromagnetic sensor networking is combined with an electromagnetic fluid induction technology, a radar water level gauge and a host algorithm are matched, and flow velocity, water level and flow parameters can be accurately collected and output; the sensor is small in fluid-imitating appearance resistance, high in system waterproofness, convenient to disassemble and assemble, small in size and low in cost, a high-precision scheme is provided for flow measurement of medium and large channels, and the flow measurement efficiency and reliability are effectively improved.

The utility model relates to the technical field of electromagnetic flow meters, in particular to an electromagnetic flow meter capable of detecting high-frequency pulsating flow, which comprises a measuring conduit, a lining is arranged on the inner side of the measuring conduit, an electrode is arranged on the inner side of the lining, an iron casing is arranged on the outer side of the measuring conduit, and a high-frequency coil is arranged on the inner side of the iron casing. The upper side of the iron shell is connected with a flow meter, the outer side of the flow meter is provided with a control button and a display, and the inner side of the flow meter is provided with a magnetic circuit module, a converter, a frequency converter, a flow acquisition module and a digital filtering module; high-frequency excitation real-time flow is collected through the flow collecting module, digital filtering processing is carried out through the digital filtering module, finally average flow processed through a filtering algorithm is displayed through a display screen, flow meter frequency output is compared with average flow output, equivalent pulse output and cumulant are compared with the real-time high-frequency flow, and the real-time high-frequency flow is obtained. And the high-frequency pulsating flow can be accurately and stably detected.

The invention discloses an advanced sewage treatment device which comprises a sewage pipeline, an outlet of the sewage pipeline is connected with a filtering device or a settling pond, the sewage pipeline sequentially comprises an inlet section, a pH adjusting section and a flocculation section in the water flow direction, the inlet section is provided with a pH detection head and a flow meter, and the side face of the pH adjusting section is connected with an acid liquor mixing pipe and an alkali liquor mixing pipe. The acid liquor mixing pipe and the alkali liquor mixing pipe are connected with a first electromagnetic flow valve, a stirring mechanism is arranged in the pH adjusting section on the rear sides of the acid liquor mixing pipe and the alkali liquor mixing pipe, the side surface of the flocculation section is connected with a flocculant mixing pipe, the flocculant mixing pipe is connected with a second electromagnetic flow valve, and a stirring mechanism is arranged in the flocculation section on the rear side of the flocculant mixing pipe. According to the sewage treatment device, in the sewage treatment process, sewage with different pH values can be finally neutralized into pH values suitable for flocculating agent reaction after entering the sewage pipeline, so that continuous reaction is realized, and the sewage treatment cost is effectively reduced.

The application discloses a kind of by temperature field and airflow field in situ adaptive control component shape laser additive manufacturing system and method thereof.Laser additive manufacturing system includes sealed protective cavity, total control unit, temperature field monitoring-control unit and airflow field monitoring-control unit.Temperature field monitoring-control unit includes infrared thermometer, thermocouple temperature measuring element and induction heating coil;Airflow field monitoring-control unit includes protective gas pipeline, electromagnetic flow regulating valve, oxygen content monitor and vacuum air filter.Total control unit includes temperature field control module and airflow field control module.Total control unit carries out in situ adaptive control to the temperature field of laser additive manufacturing by temperature field control module, improves the distribution of temperature field in the whole process of additive manufacturing, reduces the molten pool temperature gradient in the process of laser additive manufacturing, improves forming defect, and improves material performance.

The flow measuring device comprises a monitor body, the monitor body is connected with an electromagnetic circulation pipe, a machine base is arranged in a pipe opening of the electromagnetic circulation pipe, the outer wall of the machine base is connected with the inner wall of the electromagnetic circulation pipe through a filter screen, the outer side of the machine base is rotationally sleeved with a movable ring, and the movable ring is connected with the monitor body in a sleeved mode. The outer wall of the movable ring is provided with a brush rod, the brush rod is provided with a brush, the brush makes contact with the filter screen, the inner wall of the movable ring is provided with an annular tooth groove, a motor is arranged in the machine base, the output end of the motor extends out of the machine base to be connected with a gear, the gear is connected with the tooth groove in a meshed mode, and the flow measuring quality is guaranteed.

The invention relates to a portable measuring apparatus (100) for measuring at least one sap flow in a plant, said plant having an external envelope, said apparatus (100) comprising: - a microwave transmitter (10) for emitting a microwave electromagnetic flow towards a first part of the external envelope of said plant so as to heat an internal portion of said plant; - a thermal sensor (20) arranged to capture thermal radiation from said plant over time, - a processing unit (30) configured to determine, from the thermal radiation captured by the thermal sensor, a displacement of the heat front over time in said plant and to estimate, on the basis of the displacement of the heat front, the sap flow Figure for the abstract: Fig. 2