-
公开(公告)号：US5048323A
公开(公告)日：1991-09-17
申请号：US231313
申请日：1988-08-11
Applicant: James W. Stansfeld , David I. H. Atkinson
Inventor： James W. Stansfeld , David I. H. Atkinson
CPC classification number: G01F15/043 , G01N9/002
Abstract: A gas flow correction sensor for producing an output signal proportional to the ratio between line pressure and line temperature for gas flowing in a line, for use in correcting the output of a volumetric flow meter connected in the line, comprises a sealed chamber containing a fixed mass of a reference gas. The sealed chamber includes a bellows portion subjected to line pressure, thus maintaining the reference gas at line pressure. Additionally, the sealed chamber is thermally insulated and includes at least a portion disposed in a thermowell immersed in the line, so as to maintain the reference gas at line temperature. A vibrating quartz density sensor is also mounted in the thermowell, so as to produce an output signal whose frequency is proportional to the density of the reference gas, which can be shown also to be proportional to the desired line pressure to line temperature ratio.
-
公开(公告)号：US4969365A
公开(公告)日：1990-11-13
申请号：US449509
申请日：1989-12-04
Applicant: Bengt-Olof Strigard , Tord Andreasson
Inventor： Bengt-Olof Strigard , Tord Andreasson
IPC: G01F3/06 , G01F3/18 , G01F15/02 , G01F15/075
CPC classification number: G01F3/18 , G01F15/024 , G01F15/0755
Abstract: In a method for measuring the volume of a liquid flow through a measuring chamber (2) during a measuring period, a pulse generator (12) is caused to emit a number of pulses corresponding to the volume. In the measurement, the measuring period is divided into a number of measuring intervals. During each measuring interval, the pulses from the pulse generator (12) are detected, each detected pulse is multiplied by a flow correction factor, the corrected pulse values are added to a summation variable, and this summation variable is multiplied by a volume conversion factor for determining the liquid volume. The separate determined liquid volumes are thereafter summed up for all measuring intervals during the measuring period.A measuring apparatus for measuring the volume of a liquid flow through a measuring chamber (2) has a pulse generator (21, 23) for generating a number of pulses corresponding to the volume, has time base means (33) for dividing the measuring period into measuring intervals, memory means (34) for storing one or more correction factors, pulse-correcting computing means (24, 25) for multiplying each detected pulse by said one or more correction factors, adder means (26, 27) for adding the corrected pulse values, and multiplier means (35) for multiplying the added corrected pulse values by a volume conversion factor.
-
公开(公告)号：US4829449A
公开(公告)日：1989-05-09
申请号：US826332
申请日：1986-02-05
Applicant: David L. Polesnak , Richard V. Woodward
Inventor： David L. Polesnak , Richard V. Woodward
CPC classification number: G01D18/00 , G01D3/0365 , G01F15/046 , G01F25/0053
Abstract: A method and apparatus is disclosed for measuring flowing gas and at least one variable for calculating gas flow corrected to a base value of that variable. Illustratively, the measured variables are temperature and pressure, and devices are employed for measuring the temperature T.sub.f and pressure P.sub.f of the gas flowing through a conduit, and means in the illustrative form of a flow meter for measuring the volume V.sub.f of the gas flowing through the conduit. Calculating means in the illustrative form of a programmed microprocessor is employed to calculate the corrected gas volume to base conditions in accordance with an expression including the supercompressibility factor. The supercompressibility factor is calculated according to an equation involving only whole number exponentiation and a selected set of coefficients. The calculation means selects a particular set of these coefficients in accordance with indications of pressure and/or temperature.
Abstract translation: 公开了一种用于测量流动气体和至少一个用于计算校正到该变量的基值的气体流量的变量的方法和装置。 示例性地，测量的变量是温度和压力，并且使用装置来测量流过导管的气体的温度Tf和压力Pf，以及用于测量流过的气体的体积Vf的流量计的说明性形式的装置 导管。 采用编程微处理器的说明形式的计算装置根据包含超压缩因子的表达式来计算校正气体体积与基础条件。 超级压缩因子根据仅涉及整数乘数和所选择的一组系数的方程来计算。 计算装置根据压力和/或温度的指示来选择这些系数的特定集合。
-
公开(公告)号：US4637261A
公开(公告)日：1987-01-20
申请号：US802435
申请日：1985-11-27
Applicant: Robert A. Kraus , Edmund J. Kraus
Inventor： Robert A. Kraus , Edmund J. Kraus
CPC classification number: G01F1/88
Abstract: Apparatus for obtaining the mass flow rate of engine aspirated air. An ultrasonic transducer measures the density of atmospheric air, while coincidentally measuring the velocity of air within a venturi of an engine air induction tube. The two individual measurements produce a single electric output signal proportional to the mass flow rate of air.
Abstract translation: 用于获得发动机抽吸空气的质量流量的装置。 超声波换能器测量大气空气的密度，同时测量发动机空气感应管的文氏管内的空气速度。 两个单独的测量产生与空气的质量流量成比例的单个电输出信号。
-
公开(公告)号：US4512188A
公开(公告)日：1985-04-23
申请号：US411469
申请日：1982-08-25
Applicant: Charles D. Erickson
Inventor： Charles D. Erickson
CPC classification number: F04B9/115
Abstract: In a flow rate control apparatus, pressure of a primary, or controlled, liquid is reduced without application of shear forces thereto. Each of first and second piston and cylinder assemblies has a first port on one side of the piston and a second port on the other side. A secondary fluid path between the two second ports contains a controlling fluid directed through a pressure reducing valve. The rate of flow of the primary fluid from the discharge cylinder is controlled by the rate of flow of the secondary fluid through the pressure reducing valve. A four way valve couples the controlled liquid at relatively high pressure through the first port in a first cylinder, and the controlled liquid is discharged at relatively low pressure from the first port in the second cylinder. The first and second pistons are rigidly connected to assure synchronized motion and accurate metering of the controlled liquid and to provide for driving of both pistons in response to input pressure of the controlled liquid.
Abstract translation: 在流量控制装置中，在不施加剪切力的情况下，初级或受控液体的压力降低。 第一和第二活塞和气缸组件中的每一个在活塞的一侧上具有第一端口，在另一侧具有第二端口。 两个第二端口之间的二次流体路径包含引导通过减压阀的控制流体。 来自排出气缸的初级流体的流量由通过减压阀的二次流体的流量控制。 四通阀将受控液体以相对高的压力通过第一气缸中的第一端口联接，并且受控液体在相对较低的压力下从第二气缸中的第一端口排出。 第一和第二活塞刚性连接以确保受控液体的同步运动和精确计量，并且响应于受控液体的输入压力提供两个活塞的驱动。
-
Patent Agency Ranking
公开(公告)号：US4404638A
公开(公告)日：1983-09-13
申请号：US217391
申请日：1980-12-17
Applicant: Tetsuo Yada , Takeo Wada
Inventor： Tetsuo Yada , Takeo Wada
Abstract: A flow rate measuring device comprising a counter for counting pulses from a flow rate detector, a detector for detecting the temperature of a fluid to be measured, a difference detector for calculating the difference between the measured temperature from the temperature detector and a reference temperature, an arithmetic operation unit for executing predetermined arithmetic operations using the counted value from the counter, the temperature difference from the difference detector and the constant based on specific gravity, and a pulse generator for generating pulses based on the signal from the arithmetic operation unit.
Abstract translation: 一种流量测量装置，包括用于从流量检测器计数脉冲的计数器，用于检测待测流体的温度的检测器，用于计算来自温度检测器的测量温度与参考温度之间的差的差分检测器， 算术运算单元，用于使用来自计数器的计数值，与差分检测器的温度差和基于比重的常数来执行预定的算术运算;以及脉冲发生器，用于基于来自算术运算单元的信号产生脉冲。
-
公开(公告)号：US4393724A
公开(公告)日：1983-07-19
申请号：US273146
申请日：1981-06-12
Applicant: Karl-Heinz Werkmann , Wolfgang Sauerschell
Inventor： Karl-Heinz Werkmann , Wolfgang Sauerschell
CPC classification number: G01F15/08 , G01F1/10 , G01F15/008 , G01F15/022
Abstract: The present invention relates to a flow meter, particularly for liquids, having an impeller wheel arranged in a vertical tubular measurement bore and acted on by a flow stream. The impeller wheel has a bearing shaft, the ends of which are rotatably mounted in axially and radially guiding bearings respectively. The impeller wheel has one or more vanes, the flow-on attack surfaces of which are inclined to the direction of oncoming flow of the stream. A sensor detects the rotary frequency of the impeller wheel. A movable wall subdivides a chamber into two chamber halves, one of which communicates with an inlet connection and the measurement bore upstream of the impeller and the other one of which communicates with an outlet connection and the measurement bore downstream of the impeller. In order, with such a flow meter, to make possible in simple manner and at low cost of manufacture a high precision of measurement over the entire measurement range, the bearing shaft is arranged with axial play between the bearings and the impeller wheel is acted on from below by the flow. In this connection, the attack surfaces are so inclined with respect to the direction of flow that the force component, directed in the approach direction, of the force exerted by the flow stream on the impeller wheel is equal to or greater than the weight of the impeller wheel.
Abstract translation: 本发明涉及一种特别用于液体的流量计，其具有布置在垂直管状测量孔中并由流动作用的叶轮。 叶轮具有轴承轴，它们的端部分别可旋转地安装在轴向和径向导向轴承中。 叶轮具有一个或多个叶片，其流入攻击面倾斜于流的迎接流动的方向。 传感器检测到叶轮的旋转频率。 活动壁将室细分为两个室半部，其中之一与入口连接部连通，测量孔与叶轮上游连通，另一个与测量孔与叶轮下游连通。 为了使用这种流量计，为了使得在整个测量范围内以简单的方式和低成本的制造成本可以实现高精度的测量，轴承轴被布置成在轴承之间具有轴向间隙，并且叶轮被作用在 从下面的流。 在这方面，攻击面相对于流动方向倾斜，使得在流动方向上引导的力分量由叶轮上的流动流施加的力等于或大于叶轮的重量 叶轮。
-
公开(公告)号：US4379991A
公开(公告)日：1983-04-12
申请号：US135191
申请日：1980-03-28
Applicant: William W. Ho , William F. Hall
Inventor： William W. Ho , William F. Hall
CPC classification number: G01F25/0053 , G01F25/0015
Abstract: Apparatus and method are disclosed for measuring the volume of a chamber of a meter prover. The meter prover includes a piston adapted for rectilinear movement within said cylinder between a first position and a second position. The volume measuring apparatus comprises an antenna disposed within the chamber and a generator coupled to apply electromagnetic energy to the antenna whereby electromagnetic waves are emanated into the chamber. A detector is coupled to the antenna to detect electromagnetic energy reflected from the chamber and is in turn coupled to a resonant detector in the form of a cathode ray tube, whereby a minimum of the level of the electromagnetic energy may be determined. Further, a frequency detector in the form of a counter, is connected to the output of the generator to detect the frequencies of the generator output at which the minimum level occurs as observed upon a display device corresponding to the establishment of a resonant standing wave within the chamber of the meter prover. The frequency(ies) at which the resonant standing waves are established within the chamber, in turn determine the volume of the meter prover chamber. The electromagnetic field(s) are generated within the chamber of a mode selected so that at a resonant condition within the chamber, the electric and magnetic component fields of the electromagnetic field have a defined relation to the dimensions of the chamber of regular geometry, illustratively, a right circular cylinder.
Abstract translation: 公开了用于测量仪表识别器的室的体积的装置和方法。 计量器证明器包括适于在第一位置和第二位置之间在所述气缸内直线运动的活塞。 体积测量装置包括设置在腔室内的天线和连接到天线上的发生器，由此电磁波发射到腔室中。 检测器耦合到天线以检测从腔室反射的电磁能量，并且又以阴极射线管的形式耦合到谐振检测器，由此可以确定电磁能量的最小值。 此外，以计数器形式的频率检测器连接到发生器的输出端，以检测发生器输出的频率，其中发生最小电平的频率是在对应于建立共振驻波的显示装置上观察到的 仪表证明室。 谐振驻波在室内建立的频率又决定了仪表证明室的体积。 在所选择的模式的室内产生电磁场，使得在室内的共振条件下，电磁场的电和磁分量场与规则几何的室的尺寸具有限定的关系，示例性地 ，右圆柱体。
-
公开(公告)号：US4377948A
公开(公告)日：1983-03-29
申请号：US273322
申请日：1981-06-15
Applicant: Charles M. Tenney, Jr.
Inventor： Charles M. Tenney, Jr.
CPC classification number: G01F15/024
Abstract: A method and apparatus for reducing the peak loading requirements of a gas utility allow the use of a unit rate structure which depends upon the ambient outside temperature. The apparatus employs an ambient temperature measuring device and a recording element responsive thereto for providing an output reading of gas consumption which takes into account the outside ambient temperature. Thereby, a differential rate structure dependent upon the measured ambient outside temperature can be implemented. In one embodiment, the recording element has a meter which provides an actuating signal for each occurrence of a measured volumetric consumption of gas. The actuating signal is directed to one of a plurality of counters depending upon the measured outside ambient temperature. The utility then uses a different rate for each of the several counters.
Abstract translation: 用于降低燃气公用设施的峰值负载要求的方法和装置允许使用取决于环境外部温度的单位速率结构。 该装置使用环境温度测量装置和响应于此的记录元件，以提供考虑到外部环境温度的气体消耗的输出读数。 因此，可以实现取决于测量的环境温度的差分速率结构。 在一个实施例中，记录元件具有一个仪表，其为每次发生测量的气体体积消耗量提供致动信号。 根据测量的外部环境温度，致动信号被引导到多个计数器中的一个。 然后，该实用程序对于每个几个计数器使用不同的速率。
-
公开(公告)号：US4320652A
公开(公告)日：1982-03-23
申请号：US88553
申请日：1979-10-26
Applicant: Koyo Nakamura
Inventor： Koyo Nakamura
Abstract: An intake air density sensor for an internal combustion engine comprises a receptacle in the form of a flask including a spherical chamber and a tubular portion having a very fine diameter, a pressure responsive casing at least whose part is made of an elastomeric membrane and communicated with the receptacle, a gas and a conductive liquid hermetically sealed in the receptacle and pressure responsive casing, respectively, so as to locate a boundary surface between the gas and liquid in the tubular portion, and a resistor longitudinally arranged in the tubular portion so as to form short-circuiting means by the conductive liquid for the resistor, thereby detecting densities of a fluid to be measured by converting variations in pressure of fluid into variations in volume of the pressure responsive casing or sealed gas and further converting variations in position of the boundary surface of the conductive liquid into values of electrical resistances of the resistor without affecting the positional movement of the boundary surface to convert variations in density of the fluid into electrical signals with high detecting sensitivities and high accuracies.
Abstract translation: 用于内燃机的入口空气密度传感器包括一个烧瓶形式的容器，该容器包括一个球形室和一个具有非常细的直径的管状部分，压力响应壳体至少其部分由弹性膜制成并与 容器，气体和导电液体，分别密封在容器和压力响应壳体中，以便定位管状部分中的气体和液体之间的边界面，以及纵向布置在管状部分中的电阻器，以便 通过用于电阻器的导电液体形成短路装置，从而通过将流体的压力变化转换成压力响应壳体或密封气体的体积变化来检测待测量的流体的密度，并进一步转换边界位置的变化 导电液体的表面变成电阻的电阻值而不影响p 边界面的运动，将流体的密度变化转换成具有高检测灵敏度和高精度的电信号。
-
-
-
-
-
-
-
-
-
Search Results
796
records
(took 0.027 seconds)
