Provided are a heater that heats a fluid, and a temperature detector that detects a temperature of the fluid, and a flow rate of the fluid flowing through a main channel is corrected based on a tendency of a detection value detected by the temperature detector to change over time.

Provided are a heater that heats a fluid, and a temperature detector that detects a temperature of the fluid, and a flow rate of the fluid flowing through a main channel is corrected based on a tendency of a detection value detected by the temperature detector to change over time.

A multi-chamber rate-of-change flow meter system and methods for operating the same are disclosed. The multi-chamber rate-of-change flow meter system includes a collection of N chambers, means for drawing a gas into or out of the collection of N chambers, N pressure sensors corresponding one of the N chambers, and means for redistributing the gas among the chambers. A measurement module is coupled to the pressure sensors to obtain a rate of change of pressure in each of the chambers due to the redistribution of the gas and calculate a flow rate of the gas flowing into or out of the collection of N chambers based upon the rate of change of pressure in each of the chambers.

Embodiments relate to a system including a gas meter, regulator, and head end system. The system can include installing a regulator in a gas supply grid. The system may also include installing a gas meter in a gas supply grid, wherein the gas meter is installed to diagnose a grid pressure over flow rate of the regulator. In addition, the system may include determining, by the gas meter, an initial fingerprint of the regulator, wherein the initial fingerprint indicates an initial pressure and flow rate profile over a time period after the gas meter was installed. Further, the system can include comparing, by the gas meter, continuous pressure readings of the regulator with the initial fingerprint, wherein the gas meter determines if the continuous pressure readings correspond to the initial fingerprint. The system may also include notifying, by the gas meter, a head end system of the continuous pressure readings.

Safety monitoring systems and methods include a mesh communications network and an EVC (Electronic Volume Corrector) installed in one or more gas distribution components and/or industrial metering components in a gas distribution station and/or an industrial metering station. A group of sensors can be configured, which includes, for example, a gas leak sensor, a pressure transducer, a temperature transducer, an intrusion sensor and/or other types of sensors. Such sensors can be located within the gas distribution station and/or industrial metering station. The sensors communicate wirelessly with the EVC and the gas distribution and/or industrial metering components through the mesh communications network.

A sensor support portion supports a physical quantity sensor. A flow path housing portion forms a measurement flow path, which accommodates a support tip end portion of the sensor support portion. The sensor support portion includes a support front surface, which includes a front fixed portion away from the support tip end portion and fixed to an inner surface of the flow path housing portion. The physical quantity sensor includes a sensor exposure surface exposed from the support front surface. A separation distance between an end portion of the front fixed portion and an end portion of the sensor exposure surface is smaller than a separation distance between the end portion of the sensor exposure surface and the support tip end portion.

Techniques for the design and operation of an efficient battery-powered meter are described herein. A metrology unit of the meter may be at least partially located in the gas flow of a pipe, and measures gas flow rate data according to a static flow sensor. The metrology unit calculates raw gas-volume data using at least the flow rate data as input. The metrology unit measures gas temperature to produce gas temperature data, and adjusts the raw gas-volume data, based at least in part on the gas temperature data, to produce corrected gas-volume data. The metrology unit accumulates the corrected gas-volume data over multiple minutes, hours or even days, and then sends the accumulated corrected gas-volume data to an index unit of the meter. By accumulating the data over time, fewer data transmissions are required. The index unit may send the accumulated the accumulated corrected gas-volume data to a utility server.

A housing includes a measurement passage through which a part of air flowing in a main passage flows. A sensor assembly is fixed on the housing and includes a circuit board. A detection element configured to output a signal in response to a flow rate of air flowing in the measurement passage and an electronic component configured to drive the detection element are mounted on the circuit board. An outer edge of the circuit board has a fractured part with a fractured shape and a cut part having a surface roughness smaller than that of the fractured part. The fractured part at the outer edge of the circuit board is not arranged in the measurement passage but provided at a position excluding the measurement passage.

An electronic utility gas meter using MEMS thermal time-of-flight flow sensor to meter gas custody transfer mass flowrate and an additional MEMS gas sensor to measure the combustion gas composition for the correlations to the acquisition of gas high heat value simultaneously is disclosed in the present invention. The meter is designed for the applications in the city utility gas consumption in compliance with the current tariff while metering the true thermal value of the delivered gases for future upgrades. Data safety, remote data communication, and other features with state-of-the-art electronics are also included in the design.

The embodiments of the present disclosure provide a method and system for compensating ultrasonic metering based on a smart gas Internet of Things system, comprising: determining a first preset condition based on a gas pipeline feature obtained from an external database, wherein the first preset condition refers to a judgment condition for evaluating whether a flow compensation is required; obtaining a gas transportation feature and an environmental feature based on at least one sensor; determining a compensation scheme based on the gas transportation feature, the environmental feature, and the first preset condition, wherein the compensation scheme includes at least one of a flow rate compensation coefficient, a flow compensation parameter, a temperature compensation coefficient, or a pressure compensation coefficient; sending the compensation scheme to an ultrasonic metering device, and controlling the ultrasonic metering device to determine updated flow metering data according to the compensation scheme.