50 results about "Heat meter" patented technology

The invention relates to the technical field of heat meter performance test and operation and maintenance management, in particular to a heat supply working condition multi-source parameter real-time acquisition heat meter performance intelligent analysis system, which comprises a working condition simulation subsystem, a multi-source parameter real-time acquisition module, an intelligent analysis engine and data management and visual interaction interface, and a digital twinning virtual calibration module. Multi-dimensional variable working conditions are constructed through the working condition simulation subsystem, the acquisition module realizes high-precision synchronous acquisition, the intelligent analysis engine integrates multiple algorithms to complete data fusion, performance prediction, health degree evaluation and fault early warning, and the data management module realizes whole-process closed-loop management. The heat meter test accuracy and the working condition coverage are improved, intelligent analysis and accurate calibration are achieved, the operation and maintenance cost is reduced, and stable and efficient operation of a heat supply system is guaranteed.

The invention relates to the technical field of data processing, in particular to a heat supply data monitoring system based on artificial intelligence. The system comprises a return water temperature prediction module, a deviation monitoring module, a thermal load analysis module, a first pipe network state monitoring module, a second pipe network state monitoring module and a parameter correction module. An expected return water temperature target value is calculated, and a deviation monitoring module captures the difference between an actual operation state and a theoretical value based on a heat balance principle; the thermal load analysis module accurately draws a system total load curve through data of a user side intelligent heat meter, when the system is abnormal, fault sources can be intelligently distinguished, whether set parameters are misaligned or not is judged according to a thermal inertia mechanism by recognizing near-end overheating and tail-end underheating, hydraulic instability and physical blockage are accurately positioned, and the system reliability is improved. Meanwhile, self-adaptive optimization of set parameters is achieved, the accuracy and timeliness of fault diagnosis of the heat supply system are improved, and stable and efficient operation of the heat supply system is effectively guaranteed.

The invention relates to the technical field of artificial intelligence, and discloses a heat meter energy consumption behavior abnormity identification method based on a graph neural network, and the method comprises the steps: carrying out the collection and preprocessing of multi-dimensional data; constructing a three-dimensional unified representation model comprising a graph topology encoder, a time domain sequence encoder and a frequency domain feature encoder; a time-frequency joint attention mechanism is realized, and tiny abnormal sensitivity and anti-noise stability are dynamically balanced; constructing a hierarchical self-encoding network, and calculating a reconstruction error on a plurality of abstract hierarchies; calculating an anomaly score based on the reconstruction error distribution characteristics in the unified representation space, and generating an anomaly interpretation report; and optimizing and deploying the model. According to the method, time domain, frequency domain and graph domain information are organically fused, and the detection accuracy rate reaches 95% or above; tiny abnormal signals can be captured, and the abnormal early warning time is advanced to 15-20 days; the false alarm rate is controlled below 3% while high detection sensitivity is maintained; the parameter quantity is reduced by 40%, the calculation complexity is reduced by 58%, and the system maintenance cost is greatly reduced.

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

Fluid meter, namely heat quantity meter (1) for recording the quantity of cold and / or heat of a fluid, for installation in a supply line (20) or return line (21) of a fluid piping system, comprising - a connection housing (2), - a measuring arrangement for determining flow rates, - a control and evaluation unit (3) as well as - a first temperature sensor (4) which is intended for installation in the flow line (20) and is intended there for determining the temperature in the flow line (20), - a second temperature sensor (5), which is intended for installation in the return line (21) and is intended there for determining the temperature in the return line (21), - wherein a means for determining the temperature of the connection housing (2) of the fluid meter is provided, - wherein a temperature difference between the temperature of the connection housing (2) of the fluid meter and at least one of the temperatures of the first (4) and second temperature sensor (5) can be determined, wherein the control and evaluation unit (3) determines, on the basis of the determined temperature difference between the temperature of the fluid meter and at least one of the temperatures of the first and second temperature sensors (4, 5), which of the temperature sensors (4, 5) is installed in the supply line (20) or return line (21), wherein the measuring arrangement for determining the flow rate is provided as a means for determining the temperature of the connection housing (2) of the fluid meter, where the temperature sensors (4, 5) are automatically assigned to the flow (20) or return (21), wherein the temperature of the connection housing (2) of the fluid meter is determined on the basis of a temperature-dependent transit time of an ultrasonic signal in the fluid, and wherein a look-up table is provided in which the transit times of the ultrasonic signal in the fluid are stored as a function of the corresponding temperature of the fluid and / or the connection housing (2) of the fluid meter and the temperature to be determined of the connection housing (2) of the fluid meter can be derived from the transit time of the ultrasonic signal and the look-up table.

The application discloses a heat meter online fault diagnosis method and system, and relates to the technical field of energy metering.The system runs, real-time data collection and preprocessing are realized through integrated sensor groups, key features are extracted to form a feature vector FVEC, and an online anomaly detection algorithm and a fault type judgment model are used to accurately calculate an anomaly detection index AS and a fault feature probability index TYP.These data can not only reflect the health status of the system in real time, but also further optimize the response strategy and fault judgment by executing an iteration module, so that the system has the ability of self-diagnosis and adaptive adjustment.This optimization process can effectively solve the problem that the traditional heat meter system cannot realize online real-time processing and fault detection, improve the accuracy and response speed of fault identification, avoid equipment damage or energy waste caused by delayed detection, and further ensure the continuous and stable operation of the system.

The invention relates to a graphene-based energy source used in heat meters located in independently heated or cooled spaces, where a graphene-based nano-composite is utilized instead of a battery. It generates electrical energy by leveraging the temperature difference between the heating water flowing through the meter and the ambient temperature, using the Seebeck effect of thermoelectricity. This innovation eliminates the need for batteries in heat meters by transforming the meter itself into a source of energy.

1. Name of the product in this design: Mechanical Heat Meter (ZYT-RLM). 2. Purpose of this design: for heat measurement. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a novel Internet of Things ultrasonic heat meter, which comprises a measuring tube, a connecting seat is arranged in the middle of the upper side of the measuring tube, cavities are formed in the inner walls of the two sides of the connecting seat, clamping assemblies are arranged in the cavities, a threaded seat is embedded in one side of each cavity, one side of each threaded seat is in threaded connection with a fastening bolt, and the other side of each threaded seat is in threaded connection with the fastening bolt. One side of the fastening bolt is tightly attached to the clamping assembly, the upper side of the connecting seat is provided with an opening, a connecting block is inserted into the opening, the upper side of the connecting block is provided with a heat meter main body, and the front side of the heat meter main body is provided with an intelligent control module. According to the technical scheme, the upper side of the measuring tube is provided with the connecting seat, and the connecting seat is matched with the connecting block, the fastening bolt and the clamping assembly, so that the heat meter main body can be rapidly and conveniently installed, the number of ultrasonic heat meters is reduced, and the working efficiency of workers is improved.

The invention provides a shallow coaxial well heat absorption and discharge heat exchange test device, which relates to the technical field of geothermal energy resource exploration equipment, and comprises a heat preservation water tank, a water outlet of the heat preservation water tank is connected with a coaxial well water inlet through a circulating pump, a heat meter and a coaxial well water inlet temperature sensor, and the coaxial well water outlet is connected with an electric heater. A water outlet of the electric heater is connected with a second quick connector, an electric heater outlet water temperature sensor is arranged between the water outlet of the electric heater and the second quick connector, and a first quick connector is arranged at a water inlet of the heat preservation water tank; under the winter heat absorption working condition, an air source heat pump and an air source heat pump outlet water temperature sensor at a water outlet of the air source heat pump are connected between the first quick connector and the second quick connector; under the summer heat removal working condition, the first quick connector and the second quick connector are connected with the corrugated pipe; the electric heater outlet water temperature sensor, the air source heat pump outlet water temperature sensor and the heat meter are all connected with the control detection cabinet. Two working conditions of heat absorption in winter and heat extraction in summer are accurately simulated through one set of device.

The utility model discloses a calorimeter concentrator with an NFC function, which relates to the technical field of intelligent metering instruments and comprises a shell, a display screen, keys and an NFC communication module are mounted on the shell, a control unit is arranged in the shell, and the display screen, the keys and the NFC communication module are all electrically connected with the control unit. The heat meter concentrator with the NFC function solves the technical problems that a heat meter concentrator in the prior art is low in data reading efficiency, not convenient enough and the like, and the heat meter concentrator with the NFC function is convenient and fast in data reading, high in reading efficiency, high in reliability and high in reliability. And meanwhile, the functions of parameter setting, user authentication, data encryption, real-time feedback and the like can be conveniently and rapidly carried out through the mobile equipment.

The novel ultrasonic heat meter pressure-resistant shell comprises a pipeline, a first shell body and a second shell body are arranged on the front side and the rear side of the pipeline respectively, arc-shaped open grooves matched with the pipeline in diameter are formed in the inner side of the first shell body and the inner side of the second shell body respectively, and a top cover is rotationally connected to the upper side of a first opening. The utility model relates to the technical field of ultrasonic heat meters, and has the beneficial effects that according to the technical scheme, the first shell and the second shell which are detachable are arranged on the outer side of the pipeline and are matched through a plurality of groups of connecting assemblies, so that the first shell and the second shell can be quickly connected and fixed on the outer side of the pipeline; meanwhile, the upper side of the first housing is provided with the movable top cover, thereby facilitating the subsequent maintenance and other operations of the ultrasonic heat meter.

The invention discloses a situation awareness method, device and equipment for an ultrasonic heat (cold) scale and a medium. According to the method, time difference type ultrasonic arrival time signals, echo envelope signals, volume flow signals, inlet and outlet temperature signals and the like are collected; after pretreatment, physical property situations (proportion, gas content, viscosity, Pr and specific heat consistency), flow situations (Reynolds number and water hammer / pulsation voiceprint), heat exchange situations (thermal load density, thermal shock index, delta T-Q decoupling and Pr thermal diffusion) and interference situations (cavitation risk, local blockage and voiceprint dispersion) are calculated, and standardized scoring and threshold early warning are carried out on each index. According to the scheme, online identification of medium physical property evolution, flow stability, heat exchange capability and interference risk can be realized without newly adding hardware, and the method is suitable for data center liquid cooling, building HVAC and other scenes.

The utility model discloses a kind of multi-channel ultrasonic heat meters, the utility model relates to heat meter technical field, including installation pipe, further include: filter structure, the filter structure is set to one side of installation pipe, for preventing the impurities carried in the fluid flowing, the influence caused to multi-channel ultrasonic heat meter body measurement, protective structure, set to the outer wall of installation pipe, for the external protection of multi-channel ultrasonic heat meter body, the filter structure includes threaded filter cartridge, the threaded filter cartridge is set to one side of installation pipe, this multi-channel ultrasonic heat meter is provided with filter structure, by connecting cylinder cover through thread cover and threaded filter cartridge thread connection, it is convenient to disassemble and assemble to clean or replace filter component, connecting frame and rubber plug enhance the sealing and connection stability, screw hole frame can be fixed with flange mounting disc by bolt, ensure that filter structure installation firm, make filtration process stable and reliable, effectively intercept impurities, guarantee heat meter measurement accuracy.

The present invention discloses a repeater and an extended meter reading method for accessing a heat meter collector MBUS bus, and relates to the technical field of heat data acquisition of a residential building heat supply system, the repeater comprises: a repeater, which comprises an MBUS slave interface as an uplink interface and an MBUS master interface as a downlink interface, and is accessed to the MBUS bus through the interfaces; the independent power supply module is used for supplying power to the repeater and the downlink MBUS connected with the repeater; the data storage module is used for pre-storing the meter number and brand information of the newly-added heat meter mounted on the repeater and the corresponding communication current change characteristics and communication data formats of the newly-added heat meter; and the signal processing module is used for monitoring the level change of the uplink MBUS, copying a level signal to the downlink MBUS, monitoring the current change of the downlink MBUS, matching a corresponding communication data format, and carrying out data analysis and forwarding. According to the invention, centralized meter reading of multi-unit / multi-building heat meters can be realized.

1. The name of the design product: ultrasonic meter pipe section (four sound path diameter). 2. The use of the design product: used for matching ultrasonic water meter and ultrasonic heat meter, optimizing the flow state in the pipe to accurately measure the flow, and protecting the sensor probe. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The utility model discloses a heat meter capable of sealing cover protection, and specifically relates to the heat meter technology field, the heat meter comprises a heat meter body, one side surface of the heat meter body is provided with a plugging port, the internal part of the plugging port is connected with a connecting line, the top part of the heat meter body is provided with a sealing cover protection mechanism, and the sealing cover protection mechanism is connected with the connecting line. A rotating mechanism is arranged on one side of the heat meter body; the sealing cover protection mechanism comprises a protection cover which is installed on the top of the heat meter body. The sealing cover mechanism and the wiring protection mechanism are arranged, the fixing nut and the rotating rod are connected to extrude the sealing rubber ring, the sealing effect is improved, it is avoided that heat dissipation is affected or internal elements are short-circuited due to dust accumulation, and meanwhile it is avoided that due to damp, electronic elements are damaged and corroded, and the measurement precision is reduced; the connection part of the connecting line and the through groove is sealed and protected, thereby preventing the connecting line from loosening, and further preventing dust and water from entering the heat meter from the plugging port.

The utility model relates to the technical field of heat supply metering, and discloses a flow stabilization and scale inhibition type ultrasonic heat meter which comprises a flow stabilization assembly, a sealing cover is movably installed on the right side wall face of the flow stabilization assembly, the flow stabilization assembly and the scale inhibition assembly are arranged, flow stabilization and scale inhibition treatment can be effectively carried out on water flow entering an ultrasonic heat meter body, and the heat supply efficiency is improved. A water inlet bent pipe in the flow stabilizing assembly and an inclined baffle plate on the inner wall of the water inlet bent pipe are designed, so that the water flow speed can be slowed down, the generation of vortexes is reduced, the water flow is more stable, and the problems of sediment bonding and scaling caused by the vortexes are avoided; according to the ultrasonic heat meter, impurities, particles and harmful substances in water can be filtered and adsorbed step by step, scaling and corrosion are further prevented, the metering precision of the ultrasonic heat meter is improved, the service life of the ultrasonic heat meter is prolonged, the maintenance cost is reduced, and the ultrasonic heat meter has remarkable economic and social benefits.

The utility model relates to the technical field of heat supply metering, and discloses an anti-corrosion and anti-scale ultrasonic heat meter which comprises an ultrasonic heat meter body, a connecting pipe is fixedly installed on the left side wall face of the ultrasonic heat meter body, a filter box is fixedly installed on the left side wall face of the connecting pipe, and a lifting filter mechanism is arranged on the inner wall of the filter box. A water inlet pipe is fixedly mounted on the left side wall surface of the filter box, a water outlet pipe is fixedly mounted on the right side wall surface of the ultrasonic heat meter body, and the lifting filter mechanism comprises a mounting frame. According to the ultrasonic heat meter, impurities are effectively prevented from entering the ultrasonic heat meter body to cause blockage and corrosion, the service life of the ultrasonic heat meter body is prolonged, the metering precision of the ultrasonic heat meter body is improved, lifting of the lifting filtering mechanism can be conveniently controlled through the adjusting knob, the threaded rod and the top cover plate, the filter screen can be conveniently detached, replaced and cleaned, and the filtering effect is guaranteed.

The application is suitable for the field of heating technology, and provides a method and system for on-demand heating, which comprises the following steps: dividing charging units into first charging units and second charging units; the heat transferred between the first charging units does not affect the indoor temperature of each first charging unit; the heat transferred between the second charging units affects the indoor temperature of each second charging unit; for the first charging units, installing a heat meter and an intelligent flow control valve at the entrance of each first charging unit, and performing heating based on the flow uploaded to the cloud platform by the intelligent flow control valve, and charging based on the heat displayed by the heat meter; for the second charging units, installing an intelligent flow control valve at the entrance of each household of the second charging units, and performing heating based on the flow uploaded to the cloud platform by the intelligent flow control valve, and charging based on the required temperature in the household. The application can provide a method for on-demand heating, implement on-demand heating and charge for heating, and promote the behavior of energy saving of the household.

1. The name of the design product: general housing of heat meter and water meter. 2. The use of the design product: general housing of ultrasonic heat meter and ultrasonic water meter. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: perspective view.

The present application relates to the technical field of data processing, and more particularly to a heat supply data monitoring system based on artificial intelligence; the system comprises a return water temperature prediction module, a deviation monitoring module, a heat load analysis module, a first pipe network state monitoring module, a second pipe network state monitoring module and a parameter correction module. The present application calculates the expected return water temperature target value, and the deviation monitoring module captures the difference between the actual operating state and the theoretical value based on the heat balance principle; the heat load analysis module accurately draws the system total load curve through the user end intelligent heat meter data, and when the system is abnormal, it can intelligently distinguish the fault root cause, identify the near-end overheating and the end under-heating, determine whether the set parameters are inaccurate according to the heat inertia mechanism, and accurately locate the hydraulic instability and physical blockage, while realizing the adaptive optimization of the set parameters, improving the accuracy and timeliness of the heat supply system fault diagnosis, and effectively ensuring the stable and efficient operation of the heat supply system.

The utility model relates to central air conditioning technical field, and disclose central air conditioning cooling circulating water dosing device, including dosing equipment body, the support of welding in dosing equipment body surface and install in the support top meter, calorimeter, inlet pipe and outlet pipe, still include: install in the support top support mechanism and install in the support mechanism top rain baffle, the bottom fixed connection of rain baffle has extension board, the utility model discloses when using, can through the setting of rain baffle, extension board and baffle piece, to rain and sunlight shelter, avoid the influence of rain and sunlight to meter, calorimeter, inlet pipe and outlet pipe, in addition staff can through horizontal pole and open baffle piece and overhaul meter and calorimeter, solved the present part device when using in outdoor, meter and calorimeter are vulnerable to external influence and appear the problem of damage.

The utility model discloses a prepayment card swiping box for a heat supply system, which comprises a box body, a box door is arranged at the front end of the box body through a rotating shaft, and a lock catch component is arranged on the box door opposite to the rotating shaft; a liquid crystal display screen and an IC card reader are arranged on the box door; a lining plate is arranged in the box body, and a power supply module, a wireless communication module and a control module are arranged on the lining plate; the lining plate is further provided with an expansion module, and the concentrator is electrically connected with the control module. According to the utility model, the wireless communication module uploads the heat consumption information of the heating station and the opening degree of the valve to the upper computer, so that a heat source production unit can master the heat consumption condition of the heating station in real time, can analyze whether a heat meter of the heating station has a fault through data comparison, and can compare the payment amount and the consumption amount of the heating station to determine whether the heat meter has a fault or not. The valve is remotely controlled to be switched off, and remote control over heat supply is achieved.

The present application relates to the technical field of light source, disclose a test accurate light source heat meter, including base and upper pressing plate, the base forms the test area of placing group light source;Group light source includes light source, a plurality of through holes are arranged in the base, a plurality of conductive pins are arranged below the base, the upper end of the conductive pin is placed in the lower part of the through hole, a heating element is arranged in the base;When the group light source is placed on the test area, the upper pressing plate moves downward and presses on the group light source and the base, drives the base to move downward, the upper end of the conductive pin passes through the through hole and extends into the test area, and abuts against the positive and negative poles of the light source;When the upper pressing plate moves upward, the upper pressing plate is separated from the pressing on the group light source and the base, the base moves upward and resets, and the upper end of the conductive pin is located in the lower part of the through hole;The test accurate light source heat meter tests the electrical performance of the light source, the welding is loose, the heated expansion is disconnected, the unqualified light source can be tested in advance, and the test accurate effect is realized.

A device for real-time measurement and reporting of energy consumption is disclosed which comprises a wired interface configured to communicate with an electricity meter 10, retrieve electricity consumption data, and harvest energy for device operation, a wireless interface configured to communicate with automated meter 20, 30, 40 reading infrastructure for receiving data from and not limited to water, gas, and heat meters 20, 30, 40, a wireless mobile network interface configured to synchronize collected energy consumption data with a cloud service, a central processing unit configured to process, store, and synchronize energy consumption data and manage device operations based on energy availability, and an energy management system comprising an intermediate supply capacitor 105 for energy storage and regulation to enable uninterrupted operation of the device.

This utility model relates to the field of ultrasonic heat meter technology and discloses an ultrasonic heat meter with room temperature monitoring function. It includes a connecting pipe, a meter body fixedly connected to the top of the connecting pipe, a room temperature monitoring device body fixedly connected to the front side of the meter body, external pipes on both sides of the connecting pipe, and threaded sleeves rotatably connected to both sides of the connecting pipe. The inner wall of the threaded sleeve is connected to the external thread of the external pipe. Insert rods are fixedly installed at the upper and lower parts of both sides of the connecting pipe, and sealing gaskets are movably sleeved on the outside of the insert rods on both sides. Limiting mechanisms are provided on both sides of the connecting pipe, each including a hollow annular seat fixedly sleeved on the outside of the connecting pipe, with support rods symmetrically connected inside the hollow annular seat. This utility model allows for manual tightening or loosening without the use of tools, making operation more convenient. It also limits the threaded sleeves, preventing them from loosening and improving the practicality of the device.

The invention discloses an automatic hydration heat testing device and method for a cementing material, and relates to the technical field of cementing material performance testing. Comprising a constant-temperature water tank, an instrument rack, a hydration heat constant-temperature chamber, a temperature recorder, an external water pump assembly, a built-in water pump, a compressor, a heating pipe, a hydration heat sample bottle and a computer, the constant-temperature water tank is communicated with the hydration heat constant-temperature chamber through a pipeline, an external water pump assembly assists water circulation, a built-in water pump is combined with height difference to drive circulating water to flow, a temperature recorder collects the temperature of a sample through a temperature measuring line and transmits the temperature to a computer, and computer software automatically calculates hydration heat; a ball float valve and a one-way check valve of the constant-temperature water tank guarantee stable water volume, and a heating pipe and a compressor achieve accurate temperature control. According to the application, temperature acquisition, data calculation and calorimeter calibration can be automatically completed, the problems of strong manual dependence, large error and poor constant-temperature stability of existing equipment are solved, the application is adaptive to a 5-90 DEG C test environment, and accurate data support is provided for mass concrete temperature crack prevention and control.

The utility model provides an anti -interference's heat energy table integrator belongs to heat energy table integrator technical field, including base and setting on base's measuring pipe body and protective cover, the lower extreme of base is provided with the mounting sleeve, the upper extreme of base is provided with the fixed frame, the upper extreme of base is provided with four two two -sided symmetry's slot. The utility model, through setting's no bolt structure locking mechanism, not only has simplified the dismounting process of protective cover, has also improved the convenience and efficiency of operation significantly, and maintenance personnel need not with the help of additional tool, can complete the maintenance and inspection to internal device quickly, has reduced the operation difficulty and time cost, through the cooperation of reset spring and positioning block, has guaranteed the stability of inserting rod in the slot, has avoided because outside vibration or impact leads to protective cover loosening, the setting of elastic cover has further strengthened the sealing performance of device, has prevented dust and moisture effectively to invade, thereby has prolonged the service life of equipment.

A water inlet assembly comprises a water inlet pipe, the right end of the water inlet pipe is provided with a tubular first connecting block, the side face of the water inlet pipe is communicated with a pipe connector, an air cylinder is arranged on an air cylinder seat, the left end of the water inlet pipe is arranged in a closed mode, and the left end of the water inlet pipe is connected with the output end of the air cylinder. According to the device, whether the temperature sensor of the heat meter is qualified or not can be detected more accurately, large errors are avoided, the detection accuracy is improved, bubbles can be prevented from entering the heat meter as much as possible by obliquely arranging all the components, interference of the bubbles on ultrasonic signals is avoided, and the detection accuracy is improved. And the device is further provided with a detachable temperature measuring assembly, the detachable temperature measuring assembly can be detached, flow detection can be conducted on flow meters with the same caliber, and the applicability of the device is improved.