833 results about "Gas meter" patented technology

The invention discloses an Internet of Things intelligent gas meter leakage detection and early warning system and method, and relates to the technical field of gas leakage detection, and the method comprises the following steps: S1, collecting data through multiple sensors; s2, identifying an equipment operation state based on the data set and outputting a state confidence coefficient; s3, a stable monitoring window period is judged, a corresponding strategy is selected to compensate pressure data, and reliability is marked; s4, dynamically generating a detection threshold in combination with the historical mode, the real-time parameters and the data reliability; s5, dynamically adjusting a risk assessment weight according to the confidence coefficient and the reliability, calculating a risk score and determining an early warning level; s6, safety operation is executed according to grades; and S7, updating the model by using process data to realize self-optimization. According to the invention, by deploying a multi-sensor array and adopting a multi-modal signal fusion algorithm, the system can accurately identify the running state of the gas appliance, provides reliable preposition information for subsequent analysis, and overcomes the defect that data of a traditional single sensor is easily interfered.

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.

The invention relates to the technical field of safety monitoring, and discloses a linkage monitoring method and system for a gas leakage alarm and a gas meter, and the method comprises the steps: periodically regulating and controlling the temperature of a gas sensor, obtaining monitoring values at different temperatures, calculating a specific value, and recognizing gas leakage and non-leakage gas sources; when leakage is judged, activating a camera to shoot an image of a gas meter counter, synchronously acquiring temperature and pressure data, and uploading the temperature and pressure data to a data processing center; a gas consumption value is extracted based on an image recognition algorithm, environmental interference is corrected in combination with an ideal gas state equation and a dynamic compensation model, and high-precision gas consumption is generated; and by analyzing the time sequence relevance between the corrected consumption and the leakage signal, if an abnormal condition is met, the valve is automatically closed, and an alarm is given. According to the invention, high precision, low false alarm and quick response of gas leakage detection can be realized.

The invention discloses a gas meter power supply abnormity monitoring system and method based on a signal acquisition technology, and relates to the technical field of gas meter power supplies, the system comprises a multi-dimensional sensing module, a dynamic adaptive module, a multi-dimensional fusion analysis module, an intelligent judgment module and a verification execution module; according to the invention, the multi-dimensional fusion analysis module accurately calculates key parameters such as a power supply ripple coefficient and load transient response time in a corresponding mode, the electromagnetic interference intensity is calculated through professional algorithms such as discrete Fourier transform in combination with an environment electric field and a magnetic field sequence, a threshold value is dynamically adjusted based on a working mode, and a comprehensive score is calculated through multi-parameter deviation weighted fusion. The power supply state is deeply and comprehensively evaluated; the intelligent judgment module scientifically divides anomaly levels according to comprehensive scores, quantifies and distinguishes real anomaly and environmental interference by means of an environmental interference contribution degree formula, solves the problem that traditional monitoring cannot accurately recognize power anomaly under complex working conditions, and improves anomaly judgment accuracy.

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 relates to the field of intelligent assistance of indoor gas safety inspection, discloses an auxiliary identification method for indoor gas safety inspection, and aims to solve the problems of low efficiency and low quality of gas safety inspection. The method comprises the following steps: establishing a standardized inspection process, and inspecting whether gas pipelines, gas meters, gas appliances and ventilation conditions meet the conditions or not; checking the acquired image, judging whether the image meets the requirement or not, and reserving the image meeting the requirement to obtain a third-step image; step 3, judging whether the image in the step 3 has a shooting element or not, reserving the image with the shooting element as a shooting element image, screening out photos with screens of the gas meter and the gas detector, and identifying the reading of the gas meter and the detection condition of the gas detector by utilizing target detection and OCR technologies; and carrying out abnormal condition identification on the shot element image, and sending the gas serial number of which the abnormal condition is identified to an inspector. The system can assist personnel in safety check, and has remarkable advantages.

The invention discloses an Internet of Things gas meter abnormal data real-time storage and intelligent alarm method and device, and relates to the technical field of gas safety monitoring and intelligent alarm. According to the main technical scheme, real-time state data corresponding to a target gas meter are collected, wherein the real-time state data comprise a real-time flow value, a real-time temperature value and a real-time pressure value; based on the instant state data, whether the target gas meter meets an abnormal alarm condition or not is judged, the abnormal alarm condition is used for representing that at least one of an instant flow value, an instant temperature value and an instant pressure value exceeds respective target threshold values, and the target threshold values are dynamic self-adaptive threshold values for conducting geographical environment-seasonal coupling compensation on the target gas meter; and if yes, storing the instant state data as abnormal data in real time to a nonvolatile memory and uploading the abnormal data to a cloud, and executing corresponding intelligent alarm operation according to the abnormal alarm level. The invention aims to improve the accuracy of abnormal alarm so as to ensure that related abnormal data is instantly stored and uploaded to the cloud.

The invention relates to the technical field of data transmission, and discloses a gas meter information secure transmission method based on response function compensation, which comprises the following steps: collecting multi-source data and network signal quality information of a gas meter; according to a real-time network environment and physical conditions, data transmission parameters are dynamically adjusted through a response function compensation algorithm, when data transmission in a static time slot fails, a dynamic retransmission time slot is automatically allocated for retransmission, a retransmission frequency threshold value is set, and packet loss caused by channel errors or collision is compensated through a retransmission response function; a multi-layer encryption mechanism is adopted to encrypt transmission data, an optimal transmission channel is intelligently selected according to network conditions, adaptive hybrid communication is performed through star flash short-distance communication or Wi-Fi wide-area transmission, and a response compensation mechanism of multi-dimensional environmental parameters is established based on a signal transmission model; transmitting the encrypted data to a monitoring management platform through a secure channel; therefore, safety early warning decision is realized, and dynamic accurate transmission and active safety protection are realized.

The utility model relates to the technical field of instruments and meters, in particular to a gas meter with an alarm function. The leakage-proof gas meter with the alarm function comprises an installation frame, a gas meter body, a displayer and the like. A displayer is arranged on the gas meter body, and a mounting frame is mounted on the side, back on to the displayer, of the gas meter body. The electromagnet is activated, the electromagnet generates magnetic attraction after being electrified, the electromagnet moves upwards along the first guide rod, so that the first contact switch is in contact with the second contact switch to form an access, current flows to the motor through the second electric wire, the motor is started to run, and the motor runs to drive the cam to rotate through the belt. The cam rotates to extrude the first wedge block to move downwards along the second guide rod and compress the first spring, the first wedge block moves to force the extrusion rod to move inwards under stress, the displacement of the extrusion rod triggers the emergency button, and therefore emergency closing of the gas valve is achieved.

The invention relates to the technical field of gas meter supervision, in particular to an NB remote transmission ultrasonic gas meter, a supervision method and system thereof and a storage medium, the method comprises the following steps: calculating gas interference data and gas state data, respectively carrying out feature extraction on the gas interference data and the gas state data to obtain an interference feature set and a state feature set, calculating a correlation coefficient between the gas interference data and the gas state data, and carrying out feature coding and vector splicing on the interference feature set and the state feature set to obtain a target fusion state feature vector; and inputting the target fusion state feature vector of each gas application environment into a preset gas meter safety analysis model set to perform gas meter safety analysis to obtain a gas meter safety analysis result, and performing safety early warning management on the current NB remote transmission ultrasonic gas meter according to the gas meter safety analysis result to generate a safety early warning management strategy. The self-adaptive capacity of the NB remote transmission ultrasonic gas meter to the ultrasonic signals is improved.

The utility model discloses a metering module shared by a G4 ultrasonic gas meter and a G6 ultrasonic gas meter, relates to the technical field of gas metering, and solves the technical problem that an existing metering module cannot meet the use requirements of the G4 ultrasonic gas meter and the G6 ultrasonic gas meter. The device comprises a measuring pipe section, an energy converter and a fixing structure, the energy converter is fixed on the measuring pipe section, and the energy converter is a correlation type energy converter; the fixing structure is detachably connected to the gas outlet of the measuring pipe section, and the metering module is fixedly connected with an adapter of a G4 ultrasonic gas meter through the fixing structure, or the metering module is fixedly connected with an adapter of a G6 ultrasonic gas meter through the fixing structure. According to the utility model, the metering module can be fixed on the G4 ultrasonic gas meter or the G6 ultrasonic gas meter by replacing the fixing structure on the measuring pipe section, so that the use scene of the metering module is improved.

The invention discloses gas meter detection equipment for sealing performance detection. The gas meter detection equipment comprises a hollow sphere, a side connecting pipe, a top through opening, a transparent rubber sleeve, a top connecting pipe and a bottom cavity, the low-pressure air pump is provided with a U-shaped pipe; the inner wall of the hollow sphere is provided with a plurality of spherical-surface-shaped elastic pieces capable of rotating at the same time, the tops of the spherical-surface-shaped elastic pieces are all provided with top plates, the equipment successfully realizes the sealing performance detection of the gas meter, and meanwhile, mutual gathering of the plurality of spherical-surface-shaped elastic pieces is utilized, so that rotation is facilitated, and the sealing performance of the gas meter is improved. And the elasticity of the spherical surface-shaped elastic piece is utilized, so that after the top plate is loosened, the spherical surface-shaped elastic piece shields the other side connecting pipes, and therefore, the sealing performance of the gas meter connected with the single side connecting pipe can be detected, and the sealing performance of the gas meter connected with the single side connecting pipe can be detected. Therefore, the device can detect the sealing performance of a plurality of gas meters, and the efficiency of the device for detecting the sealing performance of a plurality of gas meters is greatly improved.

The application relates to the technical field of data processing, in particular to a kiln data monitoring and early warning method based on reinforcement learning, which comprises the following steps: acquiring intelligent gas meter readings at each collection time in each cycle during the operation of a rotary kiln and temperatures at each collection time at each monitoring point; calculating heat space diffusivity at each monitoring point at each collection time in each cycle, calculating heat time dissipation and heat propagation index at each monitoring point at each collection time in each cycle; constructing heat abnormality degree at each monitoring point; calculating energy consumption abnormality degree of the rotary kiln; calculating heat preservation degree at each collection time in each cycle; constructing comprehensive abnormality degree of the rotary kiln; constructing a prediction autoregressive term number according to the comprehensive abnormality degree of the rotary kiln, acquiring a predicted energy consumption of the rotary kiln, and monitoring abnormal conditions of rotary kiln operation energy consumption in combination with a preset energy consumption. The application aims to improve the reliability of rotary kiln operation energy consumption abnormality monitoring.

The invention relates to a high-reliability binding post assembly for a gas meter. The high-reliability binding post assembly is used for connecting two different wires. A welding connection part is formed at the end parts of the two wires through butt welding, and a primary coating layer is coated outside the welding connection part; a secondary injection molding body is arranged outside the primary coating layer, and the secondary injection molding body is coated outside the primary coating layer through injection molding. According to the binding post assembly, the coating / injection molding technology is adopted, tiny gaps around welding spots can be effectively filled, the binding post assembly and the wiring harness can be well combined, high reliability of the binding post assembly is guaranteed, the binding post assembly relates to few parts, the technology automation degree is high, the manual assembly link is reduced, and the production efficiency is improved. The production efficiency and consistency are improved, and the user experience is improved. The invention discloses a preparation method of a high-reliability binding post assembly for a gas meter. According to the method, the quality of the binding post assembly is ensured while the processing efficiency of the binding post assembly is effectively improved. The gas meter also has the advantage of high reliability.

A system for boiling a fluid to produce a vapor through the reaction of one or more reactive gases within the fluid is generally disclosed. The system may include a gas meter to provide specific quantities of the one or more gases to a reaction zone. The system can include electrodes that are constantly operating. Once the one or more gases pass between the electrodes from the gas meter, the electrodes automatically ignite the gas or gases without requiring control systems to trigger the electrodes' operation. The vapor and / or resultant thermal energy generated by the system can be used to provide heat, steam, warmed water, and / or other reactants for use. The vapor generated by the system can be used for power generation to turn a turbine, to provide heat via a radiator, or for various other uses.

The invention provides a gas micro-leakage detection method, device and equipment, a medium and a program product, and the method comprises the steps: determining the sampling information of each sampling point in a plurality of sampling points of a gas meter in a preset time period, and enabling the sampling information of the sampling points to comprise the measured pressure values of the sampling points and the predicted pressure values of the sampling points under a leakage-free working condition; according to the cavity volume of the gas meter, the micro-leakage standard deviation of the gas meter is determined from the micro-leakage standard deviations corresponding to the multiple preset volumes, and the sampling information of the sampling points comprises the measured pressure values of the sampling points and the predicted pressure values of the sampling points under the non-leakage working condition; and for any sampling point in the multiple sampling points, whether the sampling point meets the micro-leakage condition or not is judged according to the micro-leakage standard deviation of the gas meter and the sampling information of the sampling point, and if the multiple sampling points meet the micro-leakage condition, it is determined that gas micro-leakage exists in the gas meter, so that gas micro-leakage detection is achieved, and gas use safety is improved.

The invention relates to the field of gas meters, in particular to a high-sealing strong-flame-retardant gas meter shell with a sealing assembly, which comprises a gas meter shell body, a reinforced sealing assembly, a pressing assembly and a monitoring and maintaining assembly, metering grooves are formed in two sides of the gas meter shell body, and one side of each metering groove is covered with a metering cover shell through a bolt; according to the gas meter, the metering diaphragm is pressed by the pressing assembly, so that the sealing effect of the contact surface of the gas meter shell and the metering cover shell in a floating state can be improved by enhancing the plug-in type sealing of the sealing assembly under the interval plugging action of the metering diaphragm; meanwhile, a deep-insertion sealing sleeve is matched with the side wall type pressing sealing state of an expansion air bag ring, the sealing effect is further enhanced, the state of a pressing assembly and the state of a sealing strengthening assembly are monitored through a detection maintaining assembly, when the metering cover shell is loosened, the loosening situation can be known in advance before gas leakage, safety treatment can be conducted in advance, and the working efficiency is improved. And the operation is worry-saving and convenient.

The invention discloses an ultrasonic gas meter range expansion system, and belongs to the technical field of ultrasonic gas meters. The system comprises a signal acquisition module, the signal acquisition module is used for acquiring pulse signals on a gas meter, processing the pulse signals at sampling frequency and improving the measurement sensitivity of the pulse signals, and the signal acquisition module sends the acquired pulse signals to a signal processing end; the signal processing end is used for upgrading the pulse signal to obtain a high-precision pulse signal, so that the time difference measurement precision is improved; according to the ultrasonic gas meter, the pulse signal is processed, so that the flow measurement precision in a high-flow-rate mode and a low-flow-rate mode is improved, the measurement range of the ultrasonic gas meter is widened, and the measurement precision in the range from the low flow rate to the high flow rate is guaranteed; and through real-time temperature and pressure compensation, the gas meter can stably work under different environmental conditions, and the measuring range of the ultrasonic gas meter is further widened.

The present invention discloses a gas overflow detection method and a diaphragm gas meter, belonging to the technical field of gas meters. The method comprises: using a first timer with a first timing step to measure the pulse time interval of the diaphragm gas meter; when the count value of the first timer corresponding to the current pulse time interval is less than or equal to the first counting threshold, using a second timer with a second timing step to measure the subsequent pulse time interval of the diaphragm gas meter; the second timing step is less than the first timing step; when the count values ​​of the second timer in the pulse time intervals of a preset number of consecutive times are all less than or equal to the second counting threshold, confirming that an overflow anomaly occurs; the first or second counting threshold is the count value corresponding to the pulse time interval corresponding to the overflow threshold when the first or second timing step is used for measurement; the preset number is less than the number of complete pulse time intervals that pass within the detection time limit when gas is leaking at the overflow threshold. The present invention can timely and accurately detect gas overflow anomalies.

The invention discloses a gas leakage rate temperature compensation method and system based on an internet-of-things gas appliance, and belongs to the technical field of gas metering. The method specifically comprises the steps that a monitoring period is set, and monitoring data of an internet-of-things ultrasonic gas meter in the monitoring period is obtained in real time; clustering the monitoring data by taking the gas temperature and the pipeline pressure as feature vectors to generate a plurality of category clusters; selecting any category cluster, acquiring external temperature data and gas flow data corresponding to all feature points in the category cluster, constructing a point location diagram by taking the external temperature data as a horizontal coordinate and the gas flow data as a vertical coordinate, and fitting the point location diagram to obtain a fitting function; monitoring data of the current Internet of Things ultrasonic gas meter are obtained, the gas flow data are corrected according to the fitting function, and final gas flow data are obtained; according to the invention, the gas metering precision is improved, and the possibility of misjudgment and missed judgment of gas leakage is reduced.

The invention relates to the field of gas pressure anomaly detection, and particularly discloses a catering user gas meter pressure anomaly fluctuation risk early warning method which comprises the following steps: S1, based on historical gas pressure data, determining a pressure upper and lower limit threshold value and a pressure change rate threshold value, and constructing a dynamic gas consumption behavior model; s2, gas pressure data are monitored in real time, when a pressure value exceeds a corresponding threshold value range or a pressure change rate exceeds a corresponding threshold value, pressure abnormity early warning is triggered, and an abnormity type is identified; s3, based on the pressure overrun characteristic and fluctuation characteristic of the gas pressure curve, the risk grade is evaluated, and grading early warning is started; and S4, judging whether fluctuation is synchronous or not and carrying out fault positioning by synchronously analyzing time-space correlation characteristics of the gas pressure curve and the gas flow curve. Through multi-dimensional feature analysis, dynamic modeling and comprehensive risk assessment, abnormity can be accurately identified, a fault source can be distinguished, and the gas use safety and the operation and maintenance efficiency are effectively improved.

The invention relates to a transducer matching optimization program algorithm for an NB remote transmission ultrasonic gas meter, and the method comprises the steps: carrying out the continuous sampling of measurement data in the gas meter in a sampling time period, and obtaining a sampling data set; obtaining a first sound velocity estimation value according to the downstream propagation time and the countercurrent propagation time; obtaining a primary sieve database based on all the first sound velocity estimated values; determining a matched fluid corresponding to the target fluid in a primary screen database according to the first sound velocity estimation value; determining an initial working parameter group in the transducer in a fluid acoustic parameter database according to the matched fluid; performing adaptive correction on the initial working parameter group according to the first sound velocity estimation value to obtain a recommended working parameter group; and generating a control instruction based on the recommended working parameter group, and sending the control instruction to the transducer. Compared with a fixed gain mode, the method can be matched with various gas media in a self-adaptive mode, and the application range of the ultrasonic gas meter is remarkably expanded.

The invention relates to the technical field of gas metering, and discloses an ultrasonic gas meter with a novel calibration model and a calibration method thereof.The ultrasonic gas meter comprises an ultrasonic sensor module used for calculating the flow velocity by measuring the propagation time difference of ultrasonic waves in a gas medium; the signal processing module is used for amplifying, filtering and digitally converting the received ultrasonic signals; the microprocessor module is used for calculating and controlling the collected data; and the communication module is used for realizing data communication and system management with a remote server. By introducing a self-adaptive calibration model, a calibration coefficient can be dynamically adjusted according to real-time environmental parameters (such as temperature, pressure and fuel gas components), environmental data are collected through auxiliary sensors such as a temperature sensor and a pressure sensor, and real-time compensation is realized in combination with a machine learning model; and it is ensured that the gas meter can keep high measurement precision under different working conditions.

The invention relates to the technical field of gas flow measurement, in particular to a self-calibration MEMS (micro-electromechanical system) ultrasonic flowmeter based on an AI (artificial intelligence) algorithm, which adopts a high-frequency MEMS ultrasonic probe, a low-power-consumption driving circuit and an acoustic / electrical impedance matching structure to realize efficient transmission and stable excitation of ultrasonic signals; a low-power-consumption microcontroller and an AI compensation module are arranged in the flowmeter, temperature, pressure, time of flight (TOF) and actual sound velocity measured in a static gas state are fused, dynamic correction and intelligent analysis of gas flow are achieved, and the measurement precision in a low-flow-velocity section and under complex working conditions is remarkably improved. The device supports an event-driven low-power-consumption working mode, and long-term battery power supply and modular deployment can be realized; compared with a traditional PZT flowmeter, the scheme has better integration, stability and adaptability while reducing system cost and power consumption, and is suitable for new-generation intelligent gas meters and industrial gas flow monitoring scenes.

The utility model discloses a metering module suitable for G4 and G6 ultrasonic gas meters, which comprises a measuring pipe section, a transducer, a fixing structure and a flow guide cover, the flow guide cover is fixed on a gas inlet of the measuring pipe section, the transducer is fixed on the side surface of the measuring pipe section, and the fixing structure is detachably connected on a gas outlet of the measuring pipe section; the structure of the measuring pipe section is an integrated structure; the metering module is fixedly connected with an adapter of the G4 ultrasonic gas meter through a fixing structure, or the metering module is fixedly connected with an adapter of the G6 ultrasonic gas meter through a fixing structure. The flow guide cover is clamped and fixed to the air inlet of the measuring pipe section of the integrated structure, the fixing structure is detachably connected to the air outlet of the measuring pipe section of the integrated structure, and the transducer is installed on the side face of the measuring pipe section, so that the metering module is convenient to assemble, and the measuring efficiency is improved by replacing the fixing structure on the measuring pipe section. And the metering module can be used for both the G4 ultrasonic gas meter and the G6 ultrasonic gas meter.

The invention relates to the technical field of safe transmission, in particular to a gas meter information safe transmission method and an intelligent gas meter. The method comprises the following steps: S1, calculating a noise value and an observation value of a Hall sensor on actual gas flow; according to the method, the deviation of the observation values of the two sensors is calculated through the observation value of the Hall sensor for the actual gas flow, then whether the Hall sensor is abnormal or not is detected, and when the Hall sensor is abnormal, the gas flow is predicted by combining historical actual gas flow data, a weight coefficient and a noise value; the gas flow deviation value is calculated according to the predicted gas flow value and the actual gas flow data, whether abnormities of sudden change of the gas flow exist or not is detected, and the influence of sensor faults on gas flow detection can be reduced by detecting the abnormities of the sensor in time and predicting the gas flow, so that the gas flow detection efficiency is improved. And continuity and stability of gas flow data are ensured.

An ultrasonic gas meter based on a flow distribution metering device. A gas flow stabilizing device (001) used for stabilizing a gas flow is mounted inside a gas meter housing (100); a vent hole (110) adapted for passage of the gas flow is provided in the middle of the gas meter housing (100); an ultrasonic metering device (112) used for gas metering is mounted in the middle of the cavity of the vent hole (110); and flow distribution plates (113) used for gas flow distribution are mounted at one end of the cavity of the vent hole (110). By means of the engagement of a first flow stabilizing assembly (200), a second flow stabilizing assembly (300), a third flow stabilizing assembly (400), a limiting assembly (500) and a rotation assembly (600), the gas flow rate slows down, thus finally forming a stable gas flow, enabling more accurate metering by the ultrasonic metering device; and the service life is prolonged by means of the provision of a filter screen (111).

A dust collection adapter (10) according to the present disclosure includes: a main body (11, 12); an internal flow path (19) that is located in an interior of the main body (11, 12) and through which a gas flows; and a plurality of ribs (17, 18) that are located in the internal flow path (19) and with which the gas introduced into the internal flow path (19) collides. The dust collection adapter (10) is mounted on an adapter-receiving component located at an inlet of a gas meter. The adapter-receiving component may be, for example, a shut-off valve (20).

The utility model discloses an ultrasonic gas meter and an ultrasonic measuring pipe section, and relates to the technical field of ultrasonic measurement, the ultrasonic measuring pipe section comprises a measuring pipe, the measuring pipe comprises a first straight pipe section, a bent pipe section and a second straight pipe section which are connected in sequence, one end of the first straight pipe section is a gas outlet, and the other end of the first straight pipe section is fixedly connected with the bent pipe section; according to the ultrasonic gas meter and the ultrasonic measuring pipe section, the problem that pressure is unstable due to the fact that a user at the rear end frequently adjusts the air flow can be solved, the influence of pressure fluctuation is small when small flow is measured, and the measuring accuracy is high.

A gas meter includes a flow rate measurer that is located at a gas passage and measures a flow rate of the gas flowing through the passage, a self-diagnoser that performs self-diagnosis, and a vibration detector that detects vibration. The gas meter also includes a calculator that calculates an earthquake index value based on the detected vibration, the earthquake index value indicating the scale of an earthquake, a blocker that switches from an open state to a closed state of the passage when the earthquake index value is not less than a predetermined value, and a restoring method determiner that, when the blocker is in the closed state, determines a restoring method of restoring the blocker from the closed state to the open state based on a result of the diagnosis by the self-diagnoser and the earthquake index value.