5111results about "Volume metering" patented technology

Various automated techniques are disclosed herein for monitoring and assessing real-time and future operational and health statuses of real-world assets (e.g., physical devices, components, equipment, structures, buildings, machines, infrastructure, piping systems, etc.). A monitoring system incorporates the use of intelligent Monitoring Devices for monitoring pipe systems and / or other infrastructure for leaks / issues using IoT devices and machine learning. One or more Monitoring Device(s) are attached to specific physical equipment / structure(s) to be monitored. A Monitoring Device performs comprehensive field data gathering. The collected field data is used to train a customized ML model, which is stored locally in that Monitoring Device. The Monitoring Device monitors current conditions of the pipe using various sensors, and uses its locally stored customized, trained model to perform real-time, edge-based analysis of the monitored data to identify possible issues in real-time and / or to predict future maintenance / service needs without relying on continuous cloud connectivity.

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.

An optimization method based on measurement data of an ultrasonic gas meter, includes: if a relative strength index obtained by analysis does not meet expectation, calculating the degree of influence of a measurement condition on the relative strength index and determining whether to compensate the measurement data of the gas meter according to magnitude of the degree of influence; constructing an initial compensation model for the measurement data of the gas meter; performing sensitivity analysis on the optimized compensation model after multi-variable optimization; completing the correction of display data of the gas meter by a compensation factor combined with real-time temperature and pressure data and obtaining fluid features in a pipeline; matching the gas meter with the corresponding optimization plan from the pre-constructed gas meter optimization knowledge graph based on the correspondence between the fluid features and an optimization plan; and executing the optimization plan to optimize the gas meter.

A system performs a method for characterizing passage of a patient fluid through a conduit. The method includes quantifying flow of fluidic content through a conduit, where the fluidic content includes a patient fluid, estimating a concentration of a fluid component of the patient fluid in the fluidic content, and characterizing passage of the patient fluid loss through the conduit based on the quantified flow and the concentration of the fluid component. At least one of the quantified flow or the concentration of the fluid component is based on sensor data from a sensor arrangement coupled to the conduit. Other apparatus and methods are also described.

The invention provides a multichannel gas ultrasonic flowmeter, which relates to the technical field of flow measurement and comprises a hardware layer and a software layer, the hardware layer comprises a pipeline, a connecting mechanism, a multichannel ultrasonic transducer, a pressure sensor, a temperature sensor, a wiring terminal box and a control box with an LCD display screen; the software layer comprises a data acquisition module, a preprocessing module, a multichannel speed measurement module, a data fusion module, a dynamic parameter compensation module, a flow calculation module, a man-machine interaction module, a communication module and a storage module. Pipeline section flow velocity information is collected through a multichannel ultrasonic transducer array, and a complex flow state is fitted in combination with a weighted fusion algorithm; the flow is dynamically compensated and corrected based on pressure and temperature; reliable operation of the system is guaranteed by means of hardware redundancy and a software verification diagnosis mechanism, the problems that a traditional flowmeter is low in measurement precision and poor in working condition adaptability are solved, and high-precision and stable gas flow measurement is achieved.

A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.

A flow rate assembly can include a housing having a measurement channel extending along the housing axis and through a portion of the housing between the first and second ends of the housing, an outer cup portion positioned at least partly within the housing, and a transducer positioned within the outer cup portion and sealed from fluid flow past the outer cup portion, the transducer having a width perpendicular to the housing axis and greater than the width of the measurement channel, the transducer configured to generate an ultrasonic signal and to direct the ultrasonic signal through the measurement channel.

The invention provides an ultrasonic flowmeter for flow detection, and relates to the field of flow detection.The ultrasonic flowmeter comprises a detection pipeline and a detection host, detection probes are arranged on the two sides of the detection host, two arc-shaped scrapers are arranged on the surface of the detection pipeline, and wiping cloth and two rolling shafts are arranged between the two arc-shaped scrapers; wiping cloth is wound on the surfaces of the two pieces of wiping cloth, a second adjusting box is arranged on one side of the guide plate and the detection probe, a pressing block and a plurality of coupling agent injectors are arranged in the second adjusting box, and a plurality of nozzles with the corresponding number are arranged below the coupling agent injectors through the guide effect of second guide grooves formed in the surface of the second adjusting box. Through automatic cleaning of the ultrasonic probe and automatic adding of the coupling agent, the maintenance time of equipment is prolonged, the maintenance frequency of workers is reduced, and then the safety coefficient of the workers in a dangerous operation area is improved.

The invention relates to the technical field of flow meters, and discloses an integrated high-precision elbow flow meter which comprises a flow meter body, a filter pipe is installed at the inlet end of the flow meter body, a filter cylinder is installed in the filter pipe, one end of the filter cylinder is provided with an opening and faces water, and impellers which are coaxially arranged in a centering mode are installed in the filter cylinder. The filter pipe is installed at the inlet end of the flowmeter body, the filter barrel is arranged in the filter pipe, impurities in industrial wastewater can be intercepted, the impeller drives the first brush plate and the second brush plate to rotate, blockages in filter holes are swept, and the situation that the circulation sectional area and the measurement precision are affected due to impurity accumulation is avoided; impurities enter the impurity collector through the annular groove and the material collecting hole, waste water returns to the pipeline through the backflow pipe, circulating filtration and collection of the impurities are achieved, the impurities are discharged out of the flowmeter, the pipeline does not need to be disassembled and assembled, and later impurity cleaning work is facilitated.

The invention provides an intelligent gas pipeline differential pressure safety monitoring Internet of Things system and method and a storage medium. The Internet of Things system comprises a gas company management platform and a plurality of other platforms. The method is executed by a gas company management platform and comprises the following steps: acquiring a pressure difference data matrix of a current gas pipe network; based on the pressure difference data matrix, determining an abnormity judgment result of the current gas pipe network; determining anomaly probability distribution based on the differential pressure data matrix in response to the existence of the anomaly; generating an operation instruction set based on the abnormal probability distribution; and based on the differential pressure data matrix, generating a voltage regulation instruction, the voltage regulation instruction being configured to control a voltage regulation device to perform voltage regulation. The method can also be operated after a computer instruction stored in a computer readable storage medium is read. According to the Internet of Things system and method, real-time and accurate monitoring and analysis of the pressure difference of the gas pipeline can be realized, and safe and stable operation of a gas pipeline network is ensured.

The utility model discloses a turbine flow meter, which belongs to the technical field of turbine flow meters and comprises a flow meter body, a flange plate is mounted at the end of the flow meter body, a preamplifier is fixedly connected to the upper end of the flow meter body, a magnetoelectric converter is mounted in the preamplifier, and the magnetoelectric converter is fixedly connected with the flange plate. A front guide piece and a rear guide piece are fixedly connected to the interior of the flow meter body, an impeller is connected between the front guide piece and the rear guide piece through a bearing, a filtering disc is installed in the flow meter body, and the upper end and the lower end of the filtering disc are connected with the interior of the flow meter body through auxiliary springs; a center rod is installed in the middle of the filtering disc, and a positioning rod is inserted into the center rod. According to the turbine flowmeter, after the filter screen is blocked, automatic cleaning of the filter screen can be achieved through fluid thrust, and meanwhile when the turbine flowmeter is connected with an external pipeline, the stability of connection between the pipeline and the turbine flowmeter is effectively guaranteed.

Provide are an IoT system, a method, and a storage medium for smart gas pipeline pressure difference safety monitoring. A gas company management platform of the IoT system is configured to: obtain a pressure difference data matrix of a current gas pipeline network from a gas equipment object platform; determine an abnormality judgment result for the current gas pipeline network based on the pressure difference data matrix; in response to determining that the abnormality judgment result indicates an abnormality, determine an abnormality probability distribution of the current gas pipeline network based on the pressure difference data matrix; generate an operation instruction set based on the abnormality probability distribution; generate a pressure adjustment instruction based on the pressure difference data matrix, and send the pressure adjustment instruction to the gas equipment object platform to control a pressure adjustment device to regulate an abnormal gas pipeline in the current gas pipeline network.

A flowmeter sensor can stably measure in a wide temperature range including one over 100° C. The flowmeter sensor includes an ultrasonic transducer, a pipe, and an acoustic prism. The acoustic prism has a bottom surface that is arranged in contact with the outer peripheral surface of the pipe and a front-side inclination surface that supports the ultrasonic transducer. The acoustic prism propagates ultrasonic waves from the ultrasonic transducer toward the fluid within the pipe. The pipe is made of a first heat-resistant resin having heat resistance in a temperature range of 90° C. to 200° C. and negative thermoacoustic characteristics in which the ultrasonic transmittance decreases as the temperature rises in such a temperature range. The acoustic prism is made of a second heat-resistant resin having heat resistance in the temperature range and positive thermoacoustic characteristics in which the ultrasonic transmittance increases as the temperature rises in such a temperature range.

The invention discloses a circuit and a method for ultrasonic flow detection, the method is a signal processing method, a system main controller is provided with a double-path driving channel and a double-path ADC acquisition channel, and a switching circuit and a signal conditioning path are dynamically controlled by a microcontroller, so that the flow of ultrasonic flow is detected. Through a real-time noise correction and self-calibration mechanism running in parallel with signal acquisition, a circuit system comprises a microcontroller, a switching circuit A1, a switching circuit A2, a driving signal conditioning circuit, a receiving signal conditioning circuit, a band elimination filter circuit and ultrasonic probes Y1 and Y2, multi-channel cooperative work and error compensation are realized; through a two-way switching architecture, a switching strategy and a dynamic calibration mechanism, the problems of zero drift accumulation, environmental noise interference and difficult calibration circuit signal deviation existing in a traditional single-channel design are effectively solved, and the precision, stability and environmental adaptability of flow measurement are remarkably improved.

The fuel oil flow sensor comprises a mechanical unit and an electrical unit, the mechanical unit comprises a driving assembly, a rectifying assembly and a rotating assembly which are sequentially arranged on a central shaft, the rotating assembly comprises an impeller, a volute spiral spring and a drum wheel which are sequentially arranged on the central shaft, and the impeller is connected with the drum wheel through the volute spiral spring. The impeller is connected with the central shaft through a bearing, magnets are respectively mounted on the impeller and the drum wheel, the electrical unit comprises an impeller sensing assembly and a drum wheel sensing assembly which respectively correspond to the magnets on the impeller and the magnets on the drum wheel, and an auxiliary turbine is arranged on one side, close to the medium outlet, of the drum wheel on the central shaft. The auxiliary turbine is arranged on one side, close to the medium outlet, of the drum wheel on the central shaft, and the rotating speed of the sensor is adjusted by controlling the rotating resistance of the auxiliary turbine in the medium, so that the rotating speed of the sensor is controlled within a certain range; the problem that the output signal stability, the measurement accuracy of the sensor and the service life of the bearing are affected by too fast rotating speed of the sensor is solved.

The invention discloses a self-cleaning double-venturi flow meter and a processing technology thereof, and belongs to the technical field of flow meters and processing technologies thereof, the self-cleaning double-venturi flow meter comprises a contraction end and an expansion end on a pipeline, and the contraction end and the expansion end are connected through a throat end; the guide cleaning mechanism comprises a rotating shaft installed on the pipeline, one end of the rotating shaft is fixedly connected to the first rotating handle, the other opposite end of the rotating shaft extends to an annular baffle at the center of the inner wall of the pipeline, and arc-shaped blocks arranged on pushing rods are arranged at the two ends of the outer portion of the annular baffle correspondingly; the arc-shaped block is provided with a fillet close to the liquid flowing direction, and the arc-shaped block is provided with a curved surface part connected with the annular baffle in an abutting mode. The technical problem that the actual use effect of the double-Venturi flow meter is poor due to the fact that the interior of a pipeline is generally arranged to be a fixing mechanism, adaptive flow adjustment cannot be conducted on the interior of the pipeline, and the structure of the double-Venturi flow meter cannot be conveniently adjusted according to the actual use condition to meet the use requirement can be solved.

The invention discloses a three-rotor flow meter device, a control method and a control system, the three-rotor flow meter device comprises a shell, a plurality of rotors and a data acquisition unit, and the data acquisition unit is used for acquiring multi-modal data such as front and back pressure difference, medium temperature, absolute viscosity, vibration spectrum and rotating speed of the rotors in real time. The control system carries out real-time fusion and processing on collected original data through a decision making unit, calculates simulation slip flow based on a digital twinning dynamic compensation model, and corrects pulse equivalent in real time through an execution unit, so that high-precision dynamic compensation of flow output is achieved, and it is ensured that measurement errors are always within a preset range. Meanwhile, the system has an intelligent early warning function, and early fault diagnosis and predictive maintenance can be realized based on multi-parameter threshold comparison. According to the three-rotor flow meter, the measurement precision, stability and reliability of the three-rotor flow meter under the complex working condition are remarkably improved, and the three-rotor flow meter is particularly suitable for flow measurement under the high-viscosity medium condition.

The invention relates to a novel ultrasonic gas meter plastic pipe section structure and method, and belongs to the technical field of ultrasonic flow measurement. According to the technical scheme, an annular buckle cover is buckled on a first ultrasonic transducer and a second ultrasonic transducer, a clamping ring pressing face (G) is pressed on the top faces (H) of the first ultrasonic transducer and the second ultrasonic transducer, a clamping hook on the outer edge of an end opening of an installation base is matched with a clamping groove hole in the side wall of the annular buckle cover, the first ultrasonic transducer and the second ultrasonic transducer are pressed, and the first ultrasonic transducer and the second ultrasonic transducer are clamped. Meanwhile, a transducer sealing bulge (F) is flattened, the transducer sealing bulge (F) is in close contact with an annular pipeline sealing surface I (E), and a pipeline sealing surface II (Q) and a transducer sealing surface (P) are in contact and extruded to form a pressing structure, so that the sealing performance is ensured. According to the invention, the sealing performance of the runner is ensured, and the measurement precision and the assembly efficiency are improved; the integrated circuit board mounting positions are symmetrically arranged on the two sides of the gas meter measuring pipeline body, an integrated structure is adopted, the mounting mode is greatly simplified, and the assembling efficiency is improved.

The invention discloses a self-balancing symmetrical integrated orifice plate flowmeter and a machining process thereof, and belongs to the technical field of flowmeters.The self-balancing symmetrical integrated orifice plate flowmeter comprises a connecting pipe, an orifice plate and a supporting mechanism. According to the supporting mechanism, by arranging the connecting assembly, the adjusting assembly and the bearing assembly, the connecting pipe can be conveniently supported, the stability of the connecting pipe in the working process is improved, then the accuracy of a measurement result is improved, vibration and deformation of the connecting pipe under fluid scouring are reduced, and the durability of the flowmeter is improved; the overall height of the supporting mechanism can be adjusted according to the height of the connecting pipe, and the supporting mechanism can adapt to different installation environments.

The utility model relates to the technical field of fluid flow measuring instruments, in particular to a vortex shedding flowmeter which comprises a measuring tube, a generating body embedded in the measuring tube, a sensor arranged on one side of the generating body and a meter head arranged above the sensor. An insertion groove and a fixing groove are sequentially formed in the two sides of the measuring pipe in the direction away from the middle of the measuring pipe respectively, the fixing groove and the insertion groove are each of an annular groove-shaped structure, one end of the fixing groove is communicated with the insertion groove, the other end of the fixing groove is located on the end face of the measuring pipe, and a fixing ring is arranged in the fixing groove in a sleeved mode; the outer diameter of the fixing ring is matched with the groove diameter of the fixing groove, an inner cavity of the fixing ring is of a conical structure, the diameter of the inner cavity of the fixing ring is gradually decreased in the direction close to the inserting groove, a fixing ring made of elastic materials is sleeved with the fixing ring, and the outer structure of the fixing ring is matched with the structure of the inner cavity in the middle of the fixing ring. The vortex shedding flowmeter is good in sealing effect and accurate in measurement result.

The invention relates to a turbine flowmeter suitable for slurry flow measurement and a method for reducing abrasion, and belongs to the technical field of well cementation grouting metrology. The turbine flowmeter comprises a flow pipe body used for feeding formula slurry, and the periphery of the flow pipe body is connected with a plurality of detachable sensor seats; the two retainers are connected to the two ends of the flow pipe body respectively. The shaft sleeve is inserted into one end, facing the flow pipe body, of the retainer; the impeller shaft is inserted into the shaft sleeve and rotates in the shaft sleeve, and the impeller shaft and the flow pipe body are coaxially arranged; the impeller is coaxially connected with the impeller shaft; the technical problems that in the prior art, when a turbine flowmeter is used for mud flow measurement, precision is low, and abrasion resistance is poor can be solved.

The invention relates to the technical field of ultrasonic gas meters, in particular to an elastic ultrasonic resonance body and an ultrasonic gas meter sensor and a metering module packaged by the elastic ultrasonic resonance body. The elastic ultrasonic resonance body comprises a piezoelectric assembly, an elastic vibration plate located on one side of the piezoelectric assembly and a conductive connection assembly connecting the piezoelectric assembly and the elastic vibration plate; the elastic vibration plate, the conductive connection assembly and the piezoelectric assembly are assembled in a laminated mode in the axis direction. The elastic vibration plate is a stainless steel plate or a titanium alloy plate; the elastic vibration plate has good elasticity, and the acoustic-electric conversion effect can be improved. According to the ultrasonic gas meter sensor obtained by packaging the elastic ultrasonic resonance body, the arrangement of a matching layer is reduced, sound energy can be gathered during emission, a sound signal is controlled to be transmitted in a narrow sound channel, the sound signal is emitted through a port with a small section, the influence of disturbance flow is reduced, the ultrasonic gas meter sensor is installed at the two ends of a Venturi flow channel to obtain a metering module, and the metering module is used for metering. The flow measurement accuracy and stability can be improved.

The invention discloses a gas ultrasonic flowmeter, and relates to the technical field of ultrasonic flowmeter equipment.The gas ultrasonic flowmeter comprises a flow monitoring mechanism and further comprises a supporting and installing mechanism, and the supporting and installing mechanism is arranged at the bottom of the flow monitoring mechanism. Normal assembly of the supporting installation mechanism and the flow monitoring mechanism is achieved, the installation angle of the two supporting foot bases can be adjusted according to the installation scene, manual holding installation is facilitated through a portable handle, and the stability of equipment during placement is improved through cooperation of a balancing weight and a reinforcing side plate; the gas ultrasonic flowmeter is provided with the sealing connection mechanism and the pipeline limiting mechanism, has the advantages of eliminating uncertain inherent time delay of a plurality of sensors and a processing circuit, being accurate in measurement and the like, meanwhile, a multiplexing sound channel can serve as a redundant backup, even if an individual sensor is damaged, the gas ultrasonic flowmeter can still work normally, and the detection reliability is greatly improved.

The invention discloses an ultrasonic flow meter, and relates to the technical field of fluid measurement, the ultrasonic flow meter comprises an external clamping type flow meter and a fitting mechanism, the fitting mechanism is arranged on the lower surface of the external clamping type flow meter, and the fitting mechanism comprises a silicone rubber bag fixedly connected with the lower surface of the external clamping type flow meter; a storage bag is fixedly connected to the front end of the outer clamping type flowmeter, the storage bag is communicated with the silicone rubber bag through a conveying pipe, the storage bag and the silicone rubber bag are both filled with a coupling agent, a first support is fixedly connected to the front end of the outer clamping type flowmeter, and a threaded rod is inserted into the middle of the first support in a threaded mode; the end, close to the storage bag, of the screw rod is rotationally connected with a pressurizing plate, the short arm ends of the first support are inserted into the two sides of the pressurizing plate correspondingly, and therefore the problem that the measuring precision is affected due to the fact that sound wave transmission of the ultrasonic flowmeter in the running state is unstable due to the change of the density of the contact face is solved.

The present application relates to the field of gas measurement, and in particular to a metering flow channel structure and assembly equipment used in NB remote ultrasonic gas meters, including a flow channel body, one end of the flow channel body is provided with an air inlet, and the other end is provided with an air outlet pipe, the flow channel body is provided with an inner cavity for air flow to pass through, the inner cavity connects the air inlet with the air outlet pipe, a transducer flow channel is provided on the side wall of the flow channel body, the transducer flow channel is connected to the inner cavity of the flow channel body, the cross-section of the inner cavity is elliptical, a rectifying mechanism is provided in the inner cavity, the rectifying mechanism is used to adjust the airflow, the present application improves the poor measurement accuracy caused by unstable airflow in traditional methods, can maintain airflow stability, and achieve the effect of improving measurement accuracy.

The flowmeter comprises a flowmeter body, a water inlet pipe, a water outlet pipe, two flanges and a scale removing unit, one end of the water inlet pipe is fixedly installed on one side of the flowmeter body, one end of the water outlet pipe is fixedly installed on the other side of the flowmeter body, and the scale removing unit is fixedly installed on the other side of the flowmeter body. The two flanges are fixedly installed at the other end of the water inlet pipe and the other end of the water outlet pipe respectively. By means of the closed design, water scale can be removed under the condition that the flow meter is not disassembled in the water scale removing process; through the combined action of flowing of water flow and the power assembly, a scale removing scraping ring and a dirt scraping plate of the scale removing assembly are driven to remove scale, the dirt scraping plate removes the scale on an electrode on the premise that the electrode is not damaged, particularly, the electric contact performance of the electrode is recovered through scraping of a scale layer on the end face of the electrode, and the measuring precision of the flowmeter is ensured; the downtime of the equipment is reduced, the production continuity is ensured, and the availability of the equipment and the operation efficiency of the whole system are improved.

The invention relates to the technical field of fuel gas ultrasonic metering, and discloses a self-adaptive filtering method based on ultrasonic metering and ultrasonic metering equipment, and the self-adaptive filtering method comprises the steps: delaying an uplink echo signal for preset time to generate an uplink echo reference signal, and delaying a downlink echo signal for preset time to generate a downlink echo reference signal; respectively inputting the uplink echo signal and the downlink echo signal into a self-adaptive filter for filtering, outputting an uplink echo output signal and a downlink echo output signal, and performing iterative adjustment on a weight coefficient of the self-adaptive filter by using a variable step size, the minimum mean square value of the uplink echo error signal and the minimum mean square value of the downlink echo error signal meet the preset requirements. The self-adaptive model based on correlation is used for echo signal processing during ultrasonic metering instantaneous time difference acquisition, and the problem that interference is within a frequency sweeping range is solved.

In one embodiment, an electronic system comprises a display device to display data and processing logic coupled to the display device. The processing logic is configured to determine a duty cycle of at least one sensor for sensing flow of a product or particle through a product or particle line of an agricultural implement and to determine an amount of product or particles flowing through a line of the agricultural implement based on the duty cycle of the at least one sensor.

The invention provides a differential pressure type flow measuring device and method for low-temperature fluid, the differential pressure type flow measuring device comprises a pipeline, flow equalizing parts and a differential pressure transducer, a plurality of porous balance plates are arranged in the pipeline at intervals along the length direction of the pipeline, the flow equalizing parts are arranged between two adjacent porous balance plates, and a plurality of pressure detecting devices are arranged. The pressure detection devices are connected with the pipeline and used for measuring the pressure values of the low-temperature fluid on the two sides of each porous balance plate. Through the porous balance plates connected in series in the pipeline and the flow equalizing pieces between the porous balance plates, gas-liquid two-phase low-temperature fluid flowing through the pipeline is mixed more uniformly, when the low-temperature fluid in the pipeline flows through the porous balance plates and the flow equalizing pieces, the pressure difference can be uniformly reduced for multiple times, the pressure drop generated by each stage is not enough to cause cavitation, and the low-temperature fluid in the pipeline flows through the porous balance plates and the flow equalizing pieces. The cavitation effect is effectively avoided, and the accuracy of the flow measurement result of the low-temperature fluid at the downstream of the pipeline is improved.

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.