977results about "Volume/mass flow by dynamic fluid flow effect" patented technology

The invention discloses an anti-seismic and anti-power-frequency-interference system and method for a vortex shedding flowmeter, and relates to the technical field of flow measurement, the system comprises a signal receiving module, a vibration monitoring module, a frequency identification module, a temperature and pressure measurement module and an interference signal processing module, interference signals in a flow-free state can be accurately processed, whether actual flow exists or not can be accurately judged by measuring the temperature and pressure of fluid in a pipeline and combining the temperature and pressure with vibration and frequency characteristic information, wrong measurement data generated due to the interference signals in the flow-free state are avoided, and the measurement accuracy is improved. According to the method and the system, the measurement problem caused by misjudgment can be reduced, meanwhile, information about the equipment operation state and the pipeline environment is provided for different types of interference signals through comprehensive analysis and judgment of the system, potential equipment faults and abnormal working conditions can be found in time, and a powerful data basis is provided for maintenance and management of the equipment.

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.

The invention relates to the technical field of medical instruments, and discloses an intelligent multi-mode medical oxygen flow monitoring system, device and method. The system comprises a sensor module, a coupling modeling unit, a prediction unit, a control unit and an output module. Oxygen flow, temperature, humidity and pressure data are collected in real time through the sensor module, a dynamic coupling model of a flow field, a thermal field and a pressure field is established through the coupling modeling unit, and the prediction unit dynamically predicts the oxygen flow based on a time sequence and a state space model. The control unit optimizes sensor sampling and signal processing parameters through a feedback control algorithm, and the output module displays the oxygen flow and triggers abnormal alarm. According to the invention, high-precision monitoring, dynamic prediction and optimal control of the oxygen flow are realized, the problems of low monitoring precision, weak data analysis capability and poor interactivity in the prior art are solved, and the safety, real-time performance and intelligent level of oxygen supply are remarkably improved.

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 sensors, in particular to a self-adjusting flow sensor. Comprising a pipeline, a guide piece, a movable block, a limiting piece, a convergent-divergent pipe, a fluid director, a turbine and a frequency sensor. The diameter of the convergent-divergent pipe is automatically adjusted so as to adjust the sectional area of the pipeline, namely, the sectional area of the pipeline is large when the flow is large, the sectional area of the pipeline is reduced when the flow is medium, the sectional area of the pipeline is further reduced when the flow is small, the pressure intensity of liquid is increased, and meanwhile the impact part of the liquid to the turbine is guided according to the flow; the portion where the liquid impacts the turbine is far away from the axis, the turbine can rotate conveniently, and therefore the flow detection range is wide.

The invention relates to the technical field of flowmeter equipment, and discloses a flow velocity detection device of a flowmeter, which comprises a main body, the outer surface of the main body is fixedly connected with a magnetoelectric switch, the interior of the main body is fixedly connected with a front support frame, and the interior of the main body is fixedly connected with a rear support frame. When the obtuse angle plate is reset subsequently, the rotating ring pushes the obtuse angle plate to move backwards under the action of the elastic force of the spring ring, and when the side wall of the turbine is extruded by the corner of the obtuse angle plate and the flexible layer, certain friction force can be formed on the side wall of the turbine; the turbine can be smoothly transited to a low rotating speed through extrusion and friction force of the obtuse angle plate on the side wall of the turbine, the rotating speed overshoot phenomenon caused by inertia is reduced, the measuring error caused by the driving inertia of high-speed fluid of the turbine can be reduced, and the measuring precision in the flow changing process is improved.

The present application discloses a flowmeter for measuring continuous flow, and relates to the technical field of flowmeters. The present application includes a main housing, wherein a plurality of fixed plates are symmetrically fixedly connected inside the main housing, wherein a rotating shaft is rotatably connected inside the plurality of fixed plates, and a magnetic coupler is fixedly connected on the rotating shaft. The present application is provided with a sealing mechanism and a fastener, and the inside of the fixed block is continuously inflated through the air inlet, thereby driving the airbag to expand, and effectively improving the sealing effect between the pipeline and the main housing, thereby effectively reducing fluid leakage, thereby ensuring that the flowmeter can accurately measure the flow, avoiding waste of resources and excessive consumption, and avoiding safety accidents and production losses caused by leakage, and with the impact of the gas, the clamping plate will be driven to move together through the sealing plate, thereby clamping and stabilizing the outer wall of the pipeline, so that the pipeline can remain stable during the process of conveying liquid, thereby reducing the interference of external vibration or noise on the flowmeter measurement results.

The present invention provides a low-cost, non-invasive device (100) for measuring flow and leakage detection of fluids within closed conduits. The invention utilizes affordable a Micro-Electro Mechanical System (MEMS) based Inertial Measurement Units (IMUs) sensor (102) in the device to non-invasively measure fluid flow and leakage of fluids which exhibit turbulence or flow-induced-vibrations within a conduit. This device fin directly estimates flow rate or velocity based on the concept of Reynolds number in fluid dynamics. Further, this device is easy to install on pipes of all dimensions, requires minimal calibration, has no moving parts in contact with the fluid, can be integrated with Geographic Information System (GIS) software, and possesses advanced metering infrastructure to support remote reading and automated bill generation.

The invention relates to the technical field of flow sensors, and discloses a fuel flow sensor which comprises a shell assembly, a support is installed in the middle of the shell assembly, a first bearing is fixedly connected to the inner side of the support, and a turbine shaft is installed in the first bearing. An outer sealing sleeve for limiting the first bearing is installed at the rear end of the turbine shaft in a matched mode through threads, a first turbine is installed at the front end of the turbine shaft through a nut, and a second bearing is installed in the middle of the turbine shaft in a sleeved mode. According to the fuel flow sensor, the first turbine and the second turbine are installed in the shell assembly, the second turbine is arranged at the rear end of the first turbine, when oil flows, the first turbine and the second turbine are sequentially driven by the oil to rotate, the detection accuracy can be improved through a dual detection mode, and the detection efficiency is improved. And the rotating speed difference between the first turbine and the second turbine is observed, so that the detection structure can be accurately limited, and the detection accuracy of the detection structure is ensured.

The invention discloses a pipeline hydraulic self-energized flow monitoring device, which comprises a static part and a rotating part, and is characterized in that the static part comprises a stator, a magnetic induction coil, a flange, a fixed bracket, a turbine flowmeter, a rotary connecting device and a cap piece; the rotating component comprises a rotating wheel device, a neodymium-iron permanent magnet and a self-lubricating bearing; the rotating wheel device comprises blades and a hub body. The pipeline hydroelectric generation device and the turbine flowmeter are combined, water flows through the pipeline hydroelectric generation device to wash blades, an electromagnetic module in the device generates current through electromagnetic induction to supply the current to the turbine flowmeter and capture information, and the problem that the turbine flowmeter needs an external power source to work is effectively solved; the magnetic induction coil and the fusion rotor are fixed in the shell, absolute isolation sealing is achieved, conveyed fluid media are prevented from infiltrating a power generation equipment part, flanges are designed on the two sides of a pipeline, sealing connection with other pipelines is achieved, and equipment installation and disassembly are convenient.

The invention discloses a multifunctional flow computer which comprises a power module, a display module, an input module, an output module and a flow metering module. The input module is used for collecting output values of the flowmeter, the temperature / pressure transmitter and the component analyzer in real time; wherein the output value of the flow meter, the output value of the temperature / pressure transmitter and the component value are acquired through different acquisition channels of the flow computer; the flow calculation module is used for performing flow calculation and integrating according to the output values of the flowmeter, the temperature / pressure transmitter and the component analyzer which are acquired in real time; the detection module is used for comparing the flow output values of different types with the output values of the temperature / pressure transmitters of different types so as to check the acquisition channels, judging whether a faulty acquisition channel exists or not and generating warning information; and the output module is used for outputting an output result of the flow metering module to the display module. According to the invention, the accuracy of flow measurement and data processing can be further improved.

The invention discloses an anti-vibration vortex shedding flowmeter, and relates to the technical field of flowmeters. According to the invention, the flow is detected through eddy current and pressure change, and high measurement precision can still be maintained in an external vibration environment. By arranging a pressure adjusting ring and a deformation rubber ring, optimized detection of the low-flow-speed environment is achieved. In addition, an electromagnetic limiting structure is designed to avoid misoperation, meanwhile, the flow can be dynamically adjusted, and adaptability and measurement reliability are improved. The invention is suitable for various flow ranges, and especially shows superiority in a vibration environment and a low flow velocity condition.

The invention discloses a rotary float flowmeter for an anaesthesia machine, relates to the field of flowmeters, solves the problem that a rubber pad and foamed cotton in an existing float flowmeter are poor in durability, and comprises a glass cylinder and two supporting seats symmetrically and fixedly mounted at the top and the bottom of the glass cylinder respectively. A guide rod is fixedly installed between the inner sides of the two supporting seats, a floater body is slidably installed on the outer side of the guide rod, and butt joint pipes are arranged on the sides, away from the glass cylinder, of the supporting seats; the buffer mechanism is used for providing safe buffer for the floater body, and the buffer mechanism is mounted below the glass cylinder; by means of the buffering mechanism, when the floater body falls, the principle that like poles of magnets repel each other is utilized, buffering is provided for falling of the floater body, the problem that a rubber pad and foamed cotton in the flow meter are prone to being broken is solved, durability is higher, and therefore the safety protection effect is achieved.

The invention relates to the technical field of turbine flow meters, in particular to an anti-blocking turbine flow meter which comprises a main through pipe, a filter screen plate is fixedly connected to the left side of a positioning ring seat, a first cleaning part is arranged on the left side of the positioning ring seat, a filter screen drum is fixedly installed on the inner side of a material collecting end pipe, and a second cleaning part is arranged on the outer side of the filter screen drum. Firstly, a filter screen plate close to a water inlet flange plate is used for intercepting most impurities, at the moment, a micro motor drives a driving fluted disc, then a gear ring drives a transmission shaft, a first coupling shaft at the left end of the transmission shaft is used for driving a scraper frame, and the left side of the filter screen plate is cleaned; the mounting frame is driven by the second coupling shaft to rotate on the outer side of the filter screen drum, impurities left on screen meshes of the filter screen drum in a filtering mode are scraped off through the bristle layers on the mounting pieces, then deposited impurities are discharged through the slag discharging pipe at the bottom of the material collecting end pipe, and therefore the problem that the interior of the flow meter is blocked is effectively solved.

A force sensor system (100) is presented herein that comprises a carrier substrate (1), a sensor layer thereon and a signal processor (5). The sensor layer has a contact sensitive surface (11) and comprises a plurality of resiliently deformable sensor cells (3a, 3b, ). The sensor cells each form an enclosure around a pocket (2a, 2b, 2c, 2d) communicating with a pressure sensor (4a, 4b, 4c, 4d) that is configured to provide a respective pressure signal (Spa, Spb, ) indicative for an inside pressure inside the pocket. The inside pressure of a sensor cell is dependent on an external force exerted thereon through the contact sensitive surface according to a pressure-force relationship, wherein the pressure to force relationship is dependent on a lateral direction of the external force for two or more of the plurality of sensor cells in a mutually different manner. The signal processor (5) is configured to receive the pressure signals and to provide an output sensor signal based on the received pressure signals.

The invention relates to the technical field of flow measurement, in particular to a sewage pipeline flow measurement device and method based on dynamic image analysis, and the device comprises a rod body, a control system, a particle release module, a track acquisition module and an image and motion analysis module; the control system is arranged at the top end of the rod body; the track acquisition modules are arranged at the bottom of the rod body; the particle release module is used for storing fluorescent particles and releasing the fluorescent particles into the sewage pipeline to be detected under the control of the control system; the track acquisition module is used for shooting the interior of the sewage pipeline to be detected to obtain an image containing fluorescent particles; the image and motion analysis module is used for analyzing the motion characteristics of the fluorescent particles released in the sewage pipeline to be detected so as to determine the flow of the sewage pipeline to be detected. Thus, the bottom of the device is placed in the sewage pipeline to be detected, the motion characteristics of the fluorescent particles are determined by shooting the tracks of the fluorescent particles, the flow of the sewage pipeline is determined, and the device is efficient, accurate and low in operation difficulty.

The invention discloses a comprehensive oil pump and valve block test bed and a test method, and solves the problems that the production cost is increased due to the fact that different test stands are used for testing the performance of a mechanical oil pump, an electronic oil pump and a valve block in the prior art, and an existing test stand integrating oil pump and function valve performance testing is complex in structure and inconvenient to operate. A main motor or a direct-current power supply is adopted to drive an oil pump to be tested, so that the same test bench can be used for testing both a mechanical oil pump and an electronic oil pump. And the to-be-tested valve block is connected in parallel at the outlet of the to-be-tested oil pump, so that the performance of different valve blocks can be tested, and multi-functionalization and comprehensive performance of the oil pump test bed are realized. The clean oil tank and the dirty oil tank are independently arranged, so that test oil cannot be mixed before and after being used, when the test oil in the dirty oil tank flows back to the clean oil tank, the oil cleanliness is high through the coarse filter and the fine filter, and the problem that test data are abnormal due to the fact that the to-be-tested oil pump is blocked by impurities of the test oil is effectively solved.

An airflow monitoring switch system that includes: a switch having a switch arm that passes through an upper opening of a vacuum line where at least a portion of the switch arm extends through the upper opening of the vacuum line and into an interior of the vacuum line segment; a paddle having a vertical slot running from an uppermost point of the paddle and downwards towards a center point of the paddle; and a first paddle engaging bracket hingedly engaged to the switch arm and the paddle and a second paddle engaging bracket hingedly engaged to the switch arm on an opposite side of the first paddle engaging bracket. The vertical slot has a width that is greater than a width of the switch arm such that when the paddle is in the rotated position the switch arm is at least partially within the vertical slot.

The utility model discloses a photoelectric turbine flowmeter based on a planar magnetic coupling and a right-angle gear commutator, and relates to the technical field of measurement. The device comprises a turbine rotating mechanism and a detection unit, and the turbine rotating mechanism comprises a shell, a front fluid director, a rear fluid director, a turbine assembly, a right-angle gear commutator, a first plane magnetic coupling and a second plane magnetic coupling, the detection unit comprises a detection cavity and a photoelectric rotating speed sensing device arranged in the detection cavity; axial rotation is converted into transverse rotation through the right-angle gear commutator and the first plane magnetic coupling, the transverse rotation is transmitted to the second plane magnetic coupling in the detection cavity, and the rotation speed of the second plane magnetic coupling is obtained through detection of the photoelectric rotation speed sensing device. And the photoelectric rotating speed sensing device in the detection cavity is not polluted by substances in the shell and is not easily influenced by a magnetic field, high temperature and high pressure, so that the measured flow is accurate.

The invention discloses a long-term stable measurement and control method and system for a vortex shedding flowmeter type flow measurement and control device, and relates to the vortex shedding flowmeter type flow measurement and control technology, and the method comprises the steps: collecting a vortex shedding signal generated by a generator, converting the vortex shedding signal into a pulse signal, obtaining the vortex frequency according to the pulse signal, and collecting the pressure information and temperature information of a medium; establishing a temperature correction factor, a pressure correction factor and a corrosion erosion correction factor, and calculating the medium flow according to the calculated vortex shedding flowmeter instrument coefficient; and the calculated medium flow is compared with a set target medium, and if deviation exists, the opening degree of the valve assembly is adjusted. According to the vortex shedding flowmeter, the problem that in the prior art, when the vortex shedding flowmeter operates for a long time, flow measurement and control are not stable due to the influence of temperature, pressure and corrosion on the generating body can be solved.

The utility model relates to the technical field of flow detection, in particular to a turbine flowmeter. The turbine flowmeter comprises a main body, a rotating shaft, a turbine, a detection assembly and a driving assembly, an accommodating cavity for fluid to flow through is formed in the main body; the rotating shaft is located in the containing cavity and arranged in the fluid flowing direction. The rotating shaft is rotationally connected with the body. The turbine is located in the containing cavity and arranged on the rotating shaft. The detection assembly is located in the containing cavity and used for detecting the attack angle of the fluid to the blade so that the turbine flowmeter can determine the fluid flow according to the attack angle. When the turbine flowmeter is used for detection, the influence of a correction or compensation mechanism on the detection efficiency can be eliminated, the detection cost can be reduced, and the detection precision can be improved.

The invention relates to the technical field of water conservancy projects, and discloses a water conservancy project pipeline with a flow monitoring structure, which comprises an engineering pipeline body, the two ends of the engineering pipeline body are of outwards-expanded opening structures, and the surface of the engineering pipeline body is provided with a vertical pipeline to form a three-way pipe structure; and the vertical pipeline of the engineering pipeline body is in threaded connection with an overhaul sealing cover. According to the hydraulic engineering pipeline with the flow monitoring structure, the vertical pipeline of the engineering pipeline body is in threaded connection with the overhaul sealing cover, the overhaul sealing cover is screwed into and seals the opening of the vertical pipeline through threaded connection, and when parts such as a turbine flow meter and an ultrasonic flow meter in the pipeline need to be overhauled, maintained or calibrated and sundries in the pipeline need to be cleaned, the overhaul sealing cover can be replaced; the overhaul sealing cover can be conveniently screwed off, operation is carried out through the vertical pipeline opening, a large number of pipeline parts do not need to be disassembled, overhaul and maintenance convenience is improved, and maintenance cost and time cost are reduced.

The invention discloses an open channel flow monitoring method and system based on Karman vortex street visual identification and a self-adaptive structure, and relates to the technical field of open channel flow monitoring. The underwater depth of a rod body is automatically adjusted through a telescopic structure, and the formation of a Karman vortex street is stably induced; acquiring a vortex image by adopting a camera and extracting the shedding frequency of the vortex image in real time; and accurately inverting the water velocity and the flow rate by combining a Slodhaar relationship and a learning type model. The open channel flow monitoring method has good water level adaptability, sediment disturbance adaptability and model generalization ability, can realize high-efficiency, low-cost and intelligent open channel flow monitoring under complex field conditions, and provides powerful support for irrigation area water-saving management and control and fine management of water resources.

The invention discloses a self-adaptive vibration suppression vortex shedding flowmeter and a method. The self-adaptive vibration suppression vortex shedding flowmeter comprises a flowmeter shell, a pipe connecting flange, a vortex shedding generator and a piezoelectric sensor, the piezoelectric sensor is embedded into the damping device, the damping device restrains measurement vibration of the piezoelectric sensor, the free end of the piezoelectric sensor is connected with a detection probe, and the detection probe prevents a medium in a flow field from making contact with the root of the detection probe through a joint ring; an inner cavity is formed in the vortex street generating body, and a temperature sensor is integrated in the inner cavity to sense the temperature of fluid flowing through the vortex street generating body in real time; according to the invention, the temperature sensor is integrated in the vortex street generator, so that accurate sensing and real-time compensation of the temperature of a core flow field are realized; multi-stage vibration isolation is constructed through the damping device, the vibration isolation pad, the damping device protection shell and the top base at the same time, and vibration interference is reduced. Due to the optimal design of the detection probe, the durability is improved, and the adverse effect of vibration on signals can be reduced; and the applicability in a complex environment and the reliability of long-term operation are obviously enhanced.

A measuring system for measuring a flow parameter of a fluid flowing in a pipeline includes: a pipe; a bluff body arranged in the pipe and designed to generate vortices in the fluid flowing past the bluff body; a vortex sensor arranged downstream of the bluff body, the vortex sensor designed to produce mechanical vibrations upon being excited by the flowing fluid and to provide a vortex sensor signal and having a magnetostrictive material; a magnetic field detection unit designed to measure a change in a magnetic field resulting from mechanical forces acting on the magnetostrictive material and designed to provide a magnetic field detection signal; and transmitter electronics for analyzing the vortex sensor signal and for analyzing a functionality and / or a plausibility statement regarding the vortex sensor signal provided by the vortex sensor based on the magnetic field detection signal.

The utility model relates to the technical field of turbine flowmeters, and discloses a turbine flowmeter that is easy to replace an impeller, comprising a measuring tube 1, a connecting ring fixedly connected to the right side of the outer wall of the measuring tube 1, a measuring tube 2 clamped on the right side of the connecting ring, brackets are respectively arranged inside the measuring tube 1 and the measuring tube 2, and a clamping groove 1 opposite to each other and a clamping groove 2 evenly distributed on the left side of the inner wall of the connecting ring are opened, and an impeller body is arranged between the two brackets. In the utility model, through the mutual cooperation of the bracket, the impeller body, the telescopic rod 1, the telescopic rod 2, the rotating block, the extension block, the clamping groove 1 and the clamping groove 2, the replacement of the impeller inside the turbine flowmeter is realized, the flowmeter is preventively maintained, the long-term maintenance cost is reduced, and the failure caused by aging or damage of the impeller is avoided. At the same time, different impellers can be replaced according to different flow requirements to improve accuracy.

The utility model discloses an impact-resistant vortex shedding flowmeter with a tough structure, which relates to the technical field of vortex shedding flowmeters and comprises a vortex shedding flowmeter main body, pipeline impact-resistant components and a lower impact-resistant component, the pipeline impact-resistant components are mounted at two ends of the vortex shedding flowmeter main body, rubber impact-resistant parts are arranged in the pipeline impact-resistant components, and the lower impact-resistant component is mounted in the lower impact-resistant component. The vortex shedding flowmeter comprises a vortex shedding flowmeter body, a lower impact-resistant assembly is installed at the bottom of the vortex shedding flowmeter body, an elastic telescopic piece is arranged in the middle of a rubber impact-resistant piece and comprises a plurality of first rubber elastic rings and second rubber elastic rings, and the size of the first rubber elastic rings is larger than that of the second rubber elastic rings. The vortex shedding flowmeter solves the problems that an existing vortex shedding flowmeter carries out anti-impact operation mainly in the mode that a damping assembly is additionally arranged outside, the structure mainly aims at the influence of surrounding vibration, the effect of weakening vibration transmitted by a pipeline connected with the vortex shedding flowmeter is poor, cost is high, and installation is inconvenient.

The invention provides an intelligent pulse ultrasonic fluid measurement method and device, and belongs to the field of pulse ultrasonic fluid measurement. The method comprises the following steps: starting and initializing an intelligent pulse ultrasonic fluid measuring device arranged on a pipeline needing to be measured; the method comprises the following steps: configuring and starting an ultrasonic transmitter and an ultrasonic receiver, then setting a sampling frequency and a sampling period, enabling the ultrasonic transmitter to output a constant-amplitude signal with a fixed frequency, and enabling the ultrasonic receiver to collect the constant-amplitude signal output by the ultrasonic transmitter; carrying out amplification and frequency-selecting filtering on the collected constant-amplitude signal output by the ultrasonic transmitter, and extracting a vortex frequency effective signal; and calculating the flow velocity and flow of the fluid, and outputting the calculated flow velocity and flow. The fluid flow velocity value is calculated through the pulse ultrasonic technology, corresponding analog or digital signals are displayed and output, and a high-precision and large-range-ratio measurement result is provided.

The invention provides a turbine flow calculation method based on multiple signals, and belongs to the technical field of turbine flow calculation, and the method comprises the following steps: based on the fact that a measured fluid flows through a turbine flow meter, obtaining multiple signals of the measured fluid by utilizing the turbine flow meter, and calculating the multiple signals of the measured fluid to obtain the multiple signals of the measured fluid; the initial volume flow, temperature and pressure of the measured fluid are obtained; querying the physical property parameter table of the measured fluid, and calculating the density and viscosity of the measured fluid in combination with the temperature and pressure of the measured fluid; setting a calibration test bed and calibration flow, obtaining calibration viscosity, obtaining a correction coefficient through nonlinear fitting and calculation, and constructing a volume flow correction formula; the viscosity of the measured fluid and the initial volume flow rate are substituted into a volume flow rate correction formula, the corrected volume flow rate is obtained, and the mass flow rate of the measured fluid is obtained through calculation in combination with the density of the measured fluid; the problem that an existing turbine flowmeter does not have the density, viscosity and mass flow calculation capacity is solved.