摘要:
Described is a method and a device for more accurate measurement of a gas supply with a gas meter. A consumption-weighted correction factor is determined by weight averaging of a sensor error factor of the gas meter with a consumption profile characteristic of the gas supply location and the measuring signal is converted using the correction factor. Embodiments relate inter alia to: operation of the gas meter as volume, mass or energy meter; formulae for determining the correction factor with sensor error factors and consumption profiles relative to volume, mass or energy; and measuring signal correction in the case of a non-registering or registering gas meter. Advantages are inter alia: subsequent customer-specific measuring signal correction; no additional measuring complexity; and improved measuring accuracy, in particular improved energy measurement by means of compensation for inherent deviations of the energy signal in the vase of heat value variations.
摘要:
Described is a method and a device for more accurate measurement of a gas supply with a gas meter. A consumption-weighted correction factor is determined by weighted averaging of a sensor error factor of the gas meter with a consumption profile characteristic of the gas supply location and the measuring signal is converted into a corrected consumption or output value with the correction factor. Embodiments relate inter alia to: operation of the gas meter as volume, mass or energy meter; formulae for determining the correction factor with sensor error factors and consumption profiles relative to volume, mass or energy; and measuring signal correction in the case of a non-registering or registering gas meter. Advantages are inter alia: subsequent customer-specific measuring signal correction; no additional measuring complexity in the gas meter; and improved measuring accuracy, in particular improved energy measurement by means of compensation for inherent deviations of the energy signal in the case of heat value variations.
摘要:
The invention relates to a process and a device for thermal measuring the flow rate (v) of a fluid (3). In conventional thermal sensors the heating power P is supplied in the form of rectangular pulses. According to the invention, the sensor means (1b) are supplied by a heating control (2b) with non-constant heating pulses having a sublinear build-up dynamics P(t). Thereby, a nonlinear behaviour of the threshold value time (tS), until a threshold value temperature (Tm) is reached, as a function of the flow rate (v) can at least partially be compensated. Embodiments concern inter alia a build-up dynamics P(t) proportional to tm and/or to a time-independent amplitude factor (1+RS/RI)−1, wherein m is a Reynolds-number-dependent exponent and RS, Rl are thermal transfer resistances. The advantages are an improved precision, a shorter measuring time and an enlarged measuring range for the flow rate v.
摘要翻译:本发明涉及用于热测量流体(3)的流速(v)的方法和装置。 在传统的热传感器中,加热功率P以矩形脉冲的形式提供。 根据本发明,传感器装置(1b)由具有非线性积分动力学P(t)的非恒定加热脉冲的加热控制(2b)提供。 因此,阈值时间(t S S S S S)的非线性行为直到达到阈值温度(T ms),作为流量的函数(v )可以至少部分地被补偿。 实施例特别涉及与tΔm成正比的积分动力学P(t)和/或与时间无关的振幅因子(1 + R SUB / R< SUB> 其中m是雷诺数依赖指数,R 1,R 1是热转移 电阻。 优点是提高了精度,缩短了测量时间,扩大了流量测量范围。
摘要:
The invention relates to a method and a device for measuring a gas consumption by means of a gas meter. A gas meter with thermal mass flow sensor for determining mass flow signals (SM) and with a calibration as energy meter for outputting energy value signals (SE) is known. According to the invention, a gas type is determined by the gas meter insofar as combustible and non-combustible gas mixtures are differentiated. The gas meter is operated, in the case of a non-combustible gas mixture, with calibration in mass or standard volume units (l/min) and, in the case of a combustible gas mixture, with calibration in energy units (kWh). Embodiments concern inter alia: measurement of a gas parameter (λ, α, c, η) of the gas or determining the gas type; gas quality sensor with an identical construction to thermal flow sensor; measuring intervals lengthened in the case of non-combustible gas and shortened in the case of combustible gas. Advantages are inter alia: reliable energy measurement because of automatic differentiation between non-meterable gas and high-quality useful gas; detection of manipulation attempts; and automatic heat value tracking even without heat value measurement.
摘要翻译:本发明涉及一种通过燃气表测量气体消耗量的方法和装置。 一种具有热质量流量传感器的气量计,用于确定质量流量信号(S S M M M S),并且用作用作输出能量值信号(S E)的能量计的校准量)是已知的。 根据本发明,气体类型由气体计量器确定,只要可燃性和不可燃气体混合物不同。 在不燃性气体混合物的情况下,气体计量器以质量或标准体积单位(l / min)进行校准,并且在可燃气体混合物的情况下,以能量单位(kWh)进行校准。 实施例特别涉及:测量气体的气体参数(λ,α,c,eta)或确定气体类型; 气体质量传感器与热流量传感器具有相同的结构; 在不可燃气体的情况下测量间隔延长,在可燃气体的情况下缩短。 优点尤其在于可靠的能量测量,因为不可计量的气体和高质量的有用气体之间的自动区分; 检测操纵的尝试; 并且即使没有热值测量也能进行自动热值跟踪。
摘要:
The invention relates to a method and a device for measuring a gas consumption by means of a gas meter. A gas meter with thermal mass flow sensor for determining mass flow signals (SM) and with a calibration as energy meter for outputting energy value signals (SE) is known. According to the invention, a gas type is determined by the gas meter insofar as combustible and non-combustible gas mixtures are differentiated. The gas meter is operated, in the case of a non-combustible gas mixture, with calibration in mass or standard volume units (I/min) and, in the case of a combustible gas mixture, with calibration in energy units (kWh). Embodiments concern inter alia: measurement of a gas parameter (λ, α, c, η) of the gas or determining the gas type; gas quality sensor with an identical construction to thermal flow sensor; measuring intervals lengthened in the case of non-combustible gas and shortened in the case of combustible gas. Advantages are inter alia: reliable energy measurement because of automatic differentiation between non-meterable gas and high-quality useful gas; detection of manipulation attempts; and automatic heat value tracking even without heat value measurement.
摘要翻译:本发明涉及一种通过燃气表测量气体消耗量的方法和装置。 一种具有热质量流量传感器的气量计,用于确定质量流量信号(S S M M M S),并且用作用作输出能量值信号(S E)的能量计的校准量)是已知的。 根据本发明,气体类型由气体计量器确定,只要可燃性和不可燃气体混合物不同。 在不燃性气体混合物的情况下,气体计量器以质量或标准体积单位(I / min)校准,在可燃气体混合物的情况下,以能量单位(kWh)进行校准。 实施例特别涉及:测量气体的气体参数(λ,α,c,eta)或确定气体类型; 气体质量传感器与热流量传感器具有相同的结构; 在不可燃气体的情况下测量间隔延长,在可燃气体的情况下缩短。 优点尤其在于可靠的能量测量,因为不可计量的气体和高质量的有用气体之间的自动区分; 检测操纵的尝试; 并且即使没有热值测量也能进行自动热值跟踪。
摘要:
In a data transmission system for a pipeline which is electrically conductive at least in sections, the pipeline itself forms a data line. For this purpose, a coupling element is present for the modulation of electrical signals onto a potential of the pipeline. A cost-effective data transmission system is created which can be used in remote regions.
摘要:
A fire prevention safety device for a gas meter (3) has closure means (4, 4′, V) that can be activated by heat to interrupt the gas supply into the gas meter (3) in the event of a fire. The gas meter (3) is arranged in a bypass (2) of a gas pipe (1). At least one of the aforementioned closure means (4, 4′, V) for interrupting the gas supply is in each case arranged in the bypass (2) in the flow direction upstream and downstream of a sensor (31) belonging to the gas meter (3). The device permits a cost-efficient, simple and effective fire prevention safeguard, in particular for electronic gas meters.
摘要:
A moving body surface or paper web (1) to be investigated is irradiated at at least one irradiation site by 3 laser light sources of a surface structure measuring device (FOS1, FOS2). Reflected and scattered light is detected and evaluated in order to calculate ellipse points. An ellipse major axis ratio corresponding to a fiber orientation ratio, and a fiber orientation angle are calculated from the ellipse parameters thus obtained. Identical measurements and calculations are carried out periodically on an isotropic sample (NO) and a sample (Nx) having a fiber orientation similar to that of the body surface to be measured, in order to calibrate the measurements at the body surface (1).
摘要:
The invention relates to a differential pressure means and a gas meter arrangement for precisely measuring a gas consumption by means of a gas meter. A previously known gas meter is disposed in a bypass comprising a differential pressure means in the gas pipe for measuring a volumetric flow rate inside the gas pipe. According to the invention, the differential pressure means comprises flow ducts having decreasing diameters as the radial position increases starting from a central axis of the differential pressure means. Examples of execution include inlet ports and/or outlet ports of the flow ducts which are provided with a specific countersink angle (α), and an equidistant, concentric arrangement of flow ducts on the cross-sectional area of the differential pressure means. The invention has the advantage of increasing the differential pressure at a low volume flow rate, reducing the differential pressure at a high volume flow rate, and generally creating an improved linearity across the entire measurement range between the volume flow rate in the bypass and the volume flow rate in the gas pipe, among other things.
摘要:
A differential pressure system and a gas meter arrangement for precisely measuring a gas consumption by a gas meter is provided. A previously known gas meter is disposed in a bypass comprising a differential pressure system in the gas pipe for measuring a volumetric flow rate inside the gas pipe. The differential pressure system includes flow ducts having decreasing diameters as the radial position increases starting from a central axis of the differential pressure system. Examples of execution include inlet ports and/or outlet ports of the flow ducts which are provided with a specific countersink angle (α), and an equidistant, concentric arrangement of flow ducts on the cross-sectional area of the differential pressure system. This has the advantage of increasing the differential pressure at a low volume flow rate, reducing the differential pressure at a high volume flow rate, and generally creating an improved linearity across the entire measurement range between the volume flow rate in the bypass and the volume flow rate in the gas pipe, among other advantages.