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公开(公告)号：US4836308A
公开(公告)日：1989-06-06
申请号：US177183
申请日：1988-04-04
摘要： A platform weighing system (10) suitable for making accurate weight measurements of heavy objects, such as aircraft, is disclosed. Hardware and software combine to produce the accurate results. Analog hardware (14) includes hydraulic load cells (80a-80d), temperature sensing (91), filtering (90), and voltage-to-frequency conversion (104). Digital hardware (12) receives an oscillation signal output from the voltage-to-frequency conversion (104) and obtains load counts by monitoring the oscillation signal for consistent predetermined durations. The predetermined duration is chosen in software (226) to be immune to particularly pervasive noise signals. A microprocessor (16) converts load counts into a weight code which is output to a display (46). This conversion includes compensation for auto ranging (320), load cell excitation variance (282), temperature compensation (284), null offset variance (286), and zero drifting (304). In addition, nonlinearities in load cell output are compensated by linearly interpolating (288-296) between two of a plurality of calibration points that characterize the load cells (80a-80d ). Such compensations are performed primarily in software (200).
摘要翻译： 公开了一种适用于对飞机等重物进行精确重量测量的平台称重系统（10）。 硬件和软件相结合，产生准确的结果。 模拟硬件（14）包括液压测力传感器（80a-80d），温度感测（91），滤波（90）和电压 - 频率转换（104）。 数字硬件（12）接收从电压 - 频率转换（104）输出的振荡信号，并通过监视振荡信号获得负载计数，以保持一致的预定持续时间。 在软件（226）中选择预定的持续时间以便免受特别普遍的噪声信号的影响。 微处理器（16）将负载计数转换成输出到显示器（46）的权重码。 该转换包括对自动量程（320），称重传感器激励方差（282），温度补偿（284），零偏移方差（286）和零漂移（304）的补偿。 此外，通过在表征称重传感器（80a-80d）的多个校准点中的两个之间进行线性内插（288-296）来补偿称重传感器输出中的非线性。 这种补偿主要在软件（200）中执行。
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公开(公告)号：US4651569A
公开(公告)日：1987-03-24
申请号：US729476
申请日：1985-05-01
CPC分类号： G01P15/08 , G01G5/06 , G01L1/162 , G01L9/0022 , G01L9/0026
摘要： A digital differential pressure sensor with relatively low sensitivity to common mode line pressure errors. The sensor includes an airtight enclosure having a pair of pressure ports through which pressures are coupled to opposite sides of a pressure-sensing diaphragm, bellows, or Bourdon tube. The pressure-sensing elements generate torques which are transmitted by a shaft to stress-sensitive resonators which are isolated from the torque-producing elements by a sealed, flexible tube.
摘要翻译： 数字差压传感器对共模线路压力误差的灵敏度较低。 传感器包括具有一对压力端口的气密外壳，压力通过该压力端口连接到压力感测隔膜，波纹管或布尔登管的相对侧。 压力感测元件产生的转矩由轴传递给应力敏感的谐振器，它们通过密封的柔性管与转矩产生元件隔离。
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公开(公告)号：US4137977A
公开(公告)日：1979-02-06
申请号：US875373
申请日：1978-02-06
申请人： Richard N. Alger
发明人： Richard N. Alger
摘要： A system for weighing spools of paper includes a pair of hydraulic cylinders with pistons which may be extended to support the ends of the reel upon which the paper spool is wound. One fluid inlet of each of the cylinders is connected to a fluid reserve tank. The other fluid inlet communicates with an air-hydraulic booster through a hydraulic fluid line. A four-way, two-position valve includes an inlet from a high pressure air supply, an exhaust outlet, and air lines connected to the fluid reserve tanks and to the air-hydraulic booster. Load cells positioned on each of the pistons are connected to a scale device which provides a visual weight display. When a spool of paper is to be weighed, the valve directs high pressure air to the air-hydraulic booster to extend the pistons. The force exerted by the spool on the load cells is equal to the weight of the spool.
摘要翻译： 用于称重纸张卷轴的系统包括一对具有活塞的液压缸，活塞可以被延伸以支撑缠绕有卷轴的卷轴的端部。 每个气缸的一个流体入口连接到流体储备罐。 另一个流体入口通过液压流体管路与气动助力器连通。 四通二位阀包括来自高压空气源的入口，排气出口和连接到流体储备罐和气动助力器的空气管路。 位于每个活塞上的称重传感器连接到提供视觉重量显示的刻度装置。 当纸卷轴被称重时，阀将高压空气引导到气动助力器以延伸活塞。 阀芯在称重传感器上施加的力等于阀芯的重量。
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公开(公告)号：US3947692A
公开(公告)日：1976-03-30
申请号：US494751
申请日：1974-08-05
申请人： Viron E. Payne
发明人： Viron E. Payne
CPC分类号： G01F23/241 , G01G5/06 , G01K5/18 , G01L9/0092 , G01L9/02
摘要： A digital transducer comprises a container having two disparate materials therein defining an interface, the interface being movable through the container responsive to a force, or forces, applied to one, or both, of the materials. A plurality of sensors are spaced along the container for sensing the interface, each of which is responsive to the presence of one of the materials. Means are included for suppressing the outputs of all of the sensing means responsive to the one material except that one sensing means which is responsive to the one material and nearest the interface.
摘要翻译： 数字换能器包括容器，其中具有限定界面的两种不同的材料，所述界面可响应于施加到材料中的一种或两种的力或力而移动通过容器。 多个传感器沿着容器间隔开，用于感测接口，每个接口响应于其中一种材料的存在。 包括用于抑制响应于一种材料的所有感测装置的输出的装置，除了响应于该材料并且最接近界面的一个感测装置。
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5.发明授权Method of adjusting an apparatus comprising a flexible tube pre-tensioned with a liquid and connected to a pressure sensor 有权一种调节装置的方法，该装置包括用液体预紧并连接到压力传感器的柔性管公开(公告)号：US08516876B2
公开(公告)日：2013-08-27
申请号：US12797319
申请日：2010-06-09
申请人： Enrico Piero Gilardi
发明人： Enrico Piero Gilardi
IPC分类号： G01L27/00
CPC分类号： G01L1/02 , G01G5/06 , G01G19/4142 , G01G23/01 , G01L25/00
摘要： Method for one of adjusting (taring) or re-calibrating an apparatus that includes a liquid-filled previously pressurized flexible tube that is closed at one end and is connected to a pressure sensor at an other end. Method includes activating predetermined controlling functions by establishing a differential of an external pressure exerted onto the tube by a person and a pressure prevailing in the previously pressurized tube. In establishing the differential, the method includes taking into account variations of the pressure prevailing in the previously pressurized tube, when no external pressure is being exerted on the tube by the person, due to at least one variable external ambient parameter.
摘要翻译： 一种用于调节（重量）或重新校准装置的方法，该装置包括在一端封闭并且在另一端连接到压力传感器的充满液体的先前加压的柔性管。 方法包括通过建立由人施加在管上的外部压力和在先前加压的管中存在的压力的差异来激活预定的控制功能。 在建立差速器时，由于至少一个可变的外部环境参数，该方法包括考虑到先前加压的管中的压力的变化，当由人造成外部压力施加在管上时。
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公开(公告)号：US08330058B2
公开(公告)日：2012-12-11
申请号：US12662889
申请日：2010-05-10
申请人： Samir Mekid
发明人： Samir Mekid
摘要： The portable airbag scale is a scale that measures the weight of a load based upon a difference between measured air pressure in an inflatable bladder, the difference being measured between a first state, where the load is not positioned on the inflatable bladder, and a second state, in which the load is supported on the inflatable bladder. The portable airbag scale includes an inflatable bladder having opposed upper and lower walls and at least one sidewall. A port is formed through the at least one sidewall for selective inflation and deflation of the inflatable bladder. A pressure sensor is mounted within the inflatable bladder for measuring the air pressure therein. A controller selectively calculates the weight of the load based upon the measured difference in air pressure. A display is provided for displaying the weight of the load.
摘要翻译： 便携式安全气囊秤是基于可膨胀气囊中的测量空气压力之间的差异来测量负载的重量的刻度，所述差异是在负载未位于可充气气囊之间的第一状态和第二状态之间测量的， 状态，其中负载被支撑在可膨胀的囊上。 便携式气囊秤包括具有相对的上壁和下壁以及至少一个侧壁的可膨胀气囊。 端口通过至少一个侧壁形成，用于可膨胀气囊的选择性充气和放气。 压力传感器安装在可充气气囊内，用于测量其中的气压。 控制器基于所测量的空气压力差选择性地计算负载的重量。 提供用于显示负载的重量的显示器。
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公开(公告)号：US20110272197A1
公开(公告)日：2011-11-10
申请号：US12662889
申请日：2010-05-10
申请人： Samir Mekid
发明人： Samir Mekid
摘要： The portable airbag scale is a scale that measures the weight of a load based upon a difference between measured air pressure in an inflatable bladder, the difference being measured between a first state, where the load is not positioned on the inflatable bladder, and a second state, in which the load is supported on the inflatable bladder. The portable airbag scale includes an inflatable bladder having opposed upper and lower walls and at least one sidewall. A port is formed through the at least one sidewall for selective inflation and deflation of the inflatable bladder. A pressure sensor is mounted within the inflatable bladder for measuring the air pressure therein. A controller selectively calculates the weight of the load based upon the measured difference in air pressure. A display is provided for displaying the weight of the load.
摘要翻译： 便携式安全气囊秤是基于可膨胀气囊中的测量空气压力之间的差异来测量负载的重量的刻度，所述差异是在负载未位于可充气气囊之间的第一状态和第二状态之间测量的， 状态，其中负载被支撑在可膨胀的囊上。 便携式气囊秤包括具有相对的上壁和下壁以及至少一个侧壁的可膨胀气囊。 端口通过至少一个侧壁形成，用于可膨胀气囊的选择性充气和放气。 压力传感器安装在可充气气囊内，用于测量其中的气压。 控制器基于所测量的空气压力差选择性地计算负载的重量。 提供用于显示负载的重量的显示器。
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公开(公告)号：US4230196A
公开(公告)日：1980-10-28
申请号：US945075
申请日：1978-09-22
申请人： Edwin D. Snead
发明人： Edwin D. Snead
CPC分类号： E02F3/3411 , E02F9/264 , G01G19/083 , G01G19/10 , G01G19/12 , G01G3/147 , G01G5/06
摘要： A loader includes a lift arm assembly, raised by hydraulic lift cylinders and carrying a load bucket. Alignment members mounted respectively on the loader frame and lift arm assembly, and visible to the loader operator, identify the weigh position of the lift arm assembly. A pressure to voltage transducer is mounted on one lift cylinder, and is connected in a bridge circuit producing a DC voltage output. The bridge circuit output signal, proportional to the bucket load, is fed to an amplifier, whose output is passed to an analog-to-frequency converter producing pulses at a frequency proportional to the bucket load. An electronic clock allows the converter output pulses to pass through an AND gate to a bucket counter which displays the bucket load, and is automatically reset to zero. The converter pulses are passed to an accumulator counter through a second AND gate. The accumulator counter accumulates the weight of several bucket loads which are loaded onto a transport vehicle; and is reset manually after the vehicle is loaded.
摘要翻译： 一种装载机包括一个提升臂组件，由液压提升缸升起并承载一个装载斗。 对准构件分别安装在装载机框架和提升臂组件上，并且对于装载操作者可见，识别提升臂组件的称重位置。 电压传感器的压力安装在一个提升缸上，并连接在产生直流电压输出的桥接电路中。 与铲斗负载成比例的桥式电路输出信号被馈送到放大器，其输出被传递到以与铲斗负载成比例的频率产生脉冲的模拟 - 频率转换器。 电子时钟允许转换器输出脉冲通过与门到铲斗计数器，显示铲斗负载，并自动复位为零。 转换器脉冲通过第二个与门通过累加器计数器。 蓄能器计数器累积加载到运输车辆上的多个铲斗负载的重量; 并在车辆加载后手动复位。
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公开(公告)号：US4106580A
公开(公告)日：1978-08-15
申请号：US735146
申请日：1976-10-26
摘要： This force measuring apparatus includes a balance beam, means for applying a force representative of a load to be weighed to the balance beam, and means for applying counterweights in preselected steps to the balance beam. A signal is picked up from the position of the beam and is used to actuate a display indicating the weight of the load. The balance beam moves within a limited range of positions. Whenever it approaches one end of its limited range, a maximum or minimum signal is produced and controls a motor to drive the counterweight means to apply counterweights to the beam or to remove counterweights, as required to restore the balance beam to its limited range of positions. The display is concurrently reset to compensate for the change in the counterweight, so that the display accurately indicates the weight of the load.
摘要翻译： 该力测量装置包括平衡梁，用于将表示待称重载荷的力施加到平衡梁的装置，以及用于以平衡梁的预选步骤施加配重的装置。 从光束的位置拾取信号，并用于启动显示负载重量的显示器。 平衡梁在有限的位置范围内移动。 每当其接近其有限范围的一端时，产生最大或最小信号，并且控制电动机以驱动配重装置以将配重施加到梁上或者根据需要去除配重，以将平衡梁恢复到其有限的位置范围 。 显示器同时复位以补偿配重的变化，使得显示器准确地指示负载的重量。
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公开(公告)号：US5764541A
公开(公告)日：1998-06-09
申请号：US575792
申请日：1995-12-22
CPC分类号： G01G5/06
摘要： A method and apparatus for measurement signal compensation comprises providing an analog-to-digital converter that includes a dual slope integrator. A microprocessor controls the reference voltage applied to the integrator. An amplifier having a switchable gain, controls the amplification of the input signal to the integrator during the various phases of integration. An off-set compensation value is stored in a memory device for providing off-set compensation by charging a capacitor connected to the integrator. A full-scale rough adjust value is also stored on the memory device and is used as a specific reference to produce a reference voltage that is, in turn, used in the integrator during the negative slope phase. During the positive slope phase, the integration time is controlled by means of full-scale fine adjust values. The temperature dependent full-scale fine adjust values are produced from the preprogrammed values in memory by using interpolation techniques. For example, in the case of a piezo-resistive pressure sensor application, the temperature sensing is undertaken by intermittently sensing the temperature of the measuring circuitry using an on-chip temperature sensor, or the temperature at the top of the sensor bridge using the pressure sensors, or by using external temperature sensors. Pressure measurement depends on the plus and minus outputs of the sensor bridge, and measurement is performed by appropriately adjusting the integrator to provide for temperature compensation during the analog-to-digital conversion process.
摘要翻译： 用于测量信号补偿的方法和装置包括提供包括双斜率积分器的模数转换器。 微处理器控制施加到积分器的参考电压。 具有可切换增益的放大器在集成的各个阶段期间控制对积分器的输入信号的放大。 偏移补偿值存储在存储器件中，用于通过对连接到积分器的电容器进行充电来提供偏置补偿。 全面的粗略调整值也存储在存储器件中，并且用作特定参考以产生在负斜率阶段期间在积分器中使用的参考电压。 在正斜率阶段，通过满量程微调值控制积分时间。 通过使用插值技术，通过存储器中的预编程值产生与温度相关的全刻度微调值。 例如，在压电压力传感器应用的情况下，通过使用片上温度传感器间歇地感测测量电路的温度或使用压力传感器桥顶部温度进行温度感测 传感器，或使用外部温度传感器。 压力测量取决于传感器桥的正，负输出，通过适当调整积分器来进行测量，以在模数转换过程中提供温度补偿。
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