THERMAL GAS FLOWMETER COMPRISING A GAS QUALITY INDICATOR
    1.
    发明申请
    THERMAL GAS FLOWMETER COMPRISING A GAS QUALITY INDICATOR 审中-公开
    带气量指示器的热式气体流量计

    公开(公告)号:WO2004018976A3

    公开(公告)日:2004-04-22

    申请号:PCT/CH0300492

    申请日:2003-07-22

    CPC classification number: G01F25/0053 G01F1/6965 G01F15/046 G01N33/225

    Abstract: The invention relates to a method and a device for measuring gas consumption by means of a gas meter (1). A gas meter (1) comprising a thermal flow sensor (1a) for determining mass flow signals (SM) and a calibrating device used as an energy measuring appliance for emitting energy value signals (SE) is known. According to the invention, a gas type is determined by the gas meter (1) insofar as combustible and non-combustible gas mixtures (3) are differentiated. For a non-combustible gas mixture (3), the gas meter (1) is operated with calibration in mass units or units of volume under standard conditions (1/min), and for a combustible gas mixture (3), with calibration in energy units (kWh). Forms of embodiment include, inter alia, the measurement of a parameter (lambda, alpha, c, eta) of the gas (3) in order to determine the gas type; a gas quality sensor (1a) with the same structure as the thermal flow sensor (1a); and longer measuring intervals for a non-combustible gas (3) and shorter measuring intervals for a combustible gas (3). The advantages of the invention are, inter alia, reliable energy measurement as a result of the automatic differentiation between a non-accountable gas (3) and a high-quality useful gas (3); recognition of manipulation attempts; and automatic calorific value tracking even without calorific value measurement.

    Abstract translation: 本发明涉及一种用于通过燃气表(1)测量燃气消耗的方法和装置。 具有用于确定质量流量信号(SM)并具有用于输出能量值信号(SE)的能量计的校准的具有热流量传感器(1a)的气量计(1)是已知的。 根据本发明,燃气表(1)确定气体类型的程度,以区分可燃气体混合物(3)和不可燃气体混合物(3)。 燃气表(1)以不可燃气体混合物(3)运行,以质量或标准体积单位(1 / min)和可燃气体混合物(3)进行校准,并以能量单位(kWh)进行校准。 实施例涉及u。 a。测量用于气体类型测定的气体(3)的气体参数(λ,α,c,η); 气体质量传感器(1a)与热流量传感器(1a)具有相同的结构; 测量间隔随着不可燃气体(3)的增加和可燃气体的缩短(3)。 优点包括:由于自动区分不可充气气体(3)和高质量有用气体(3),可靠的能量测量; 检测操纵企图; 即使没有热值测量,也能实现自动发热量跟踪。

    THERMAL GAS FLOWMETER COMPRISING A GAS QUALITY INDICATOR

    公开(公告)号:AU2003290747A1

    公开(公告)日:2004-03-11

    申请号:AU2003290747

    申请日:2003-07-22

    Abstract: Method for measuring gas consumption using a gas meter, especially for measuring gas energy consumption, whereby the meter is suitable for measuring both a gas mass flow and energy consumption in that the meter determines the gas type and if it is incombustible calculates a mass flow in weight or volume units, liters per minute (l/min), while if it is combustible calculates consumption in energy units, kWh. An independent claim is made for a gas meter that functions as both a mass flowmeter and an energy meter, having a gas quality sensor with means for determining a gas parameter that is indicative of whether the gas is combustible or not. To determine the gas type its heat conductivity, heat capacity, diffusivity or viscosity are calculated, from which the gas mixture can be determined.

    3.
    发明专利
    未知

    公开(公告)号:AT522793T

    公开(公告)日:2011-09-15

    申请号:AT03700005

    申请日:2003-01-09

    Abstract: The method involves passing the flow over a sensor element (1) with a heating arrangement (1a) for altering the temperature and a sensor element (1b) for determining its temperature. The heating arrangement is operated at least occasionally with a heating power in the form of heating pulses and a flow-dependent threshold time is measured until a defined temperature threshold is reached. AN Independent claim is also included for the following: an arrangement for implementing the inventive method.

    THERMAL GAS FLOWMETER COMPRISING A GAS QUALITY INDICATOR

    公开(公告)号:CA2496489A1

    公开(公告)日:2004-03-04

    申请号:CA2496489

    申请日:2003-07-22

    Abstract: The invention relates to a method and a device for measuring gas consumption by means of a gas meter (1). A gas meter (1) comprising a thermal flow senso r (1a) for determining mass flow signals (SM) and a calibrating device used as an energy measuring appliance for emitting energy value signals (SE) is know n. According to the invention, a gas type is determined by the gas meter (1) insofar as combustible and non-combustible gas mixtures (3) are differentiated. For a non-combustible gas mixture (3), the gas meter (1) is operated with calibration in mass units or units of volume under standard conditions (1/min), and for a combustible gas mixture (3), with calibration in energy units (kWh). Forms of embodiment include, inter alia, the measurement of a parameter (.lambda., .alpha., c, .eta.) of the gas (3) in order to determine the gas type; a gas quality sensor (1a) with the same structure as the thermal flow sensor (1a); and longer measuring intervals for a non- combustible gas (3) and shorter measuring intervals for a combustible gas (3 ). The advantages of the invention are, inter alia, reliable energy measurement as a result of the automatic differentiation between a non-accountable gas ( 3) and a high-quality useful gas (3); recognition of manipulation attempts; and automatic calorific value tracking even without calorific value measurement.

    METHOD FOR THERMAL FLOW MEASUREMENT WITH NON CONSTANT HEATING PULSES

    公开(公告)号:AU2003200830A1

    公开(公告)日:2003-07-24

    申请号:AU2003200830

    申请日:2003-01-09

    Abstract: The method involves passing the flow over a sensor element (1) with a heating arrangement (1a) for altering the temperature and a sensor element (1b) for determining its temperature. The heating arrangement is operated at least occasionally with a heating power in the form of heating pulses and a flow-dependent threshold time is measured until a defined temperature threshold is reached. AN Independent claim is also included for the following: an arrangement for implementing the inventive method.

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