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公开(公告)号：US5135002A
公开(公告)日：1992-08-04
申请号：US400274
申请日：1989-08-29
IPC分类号： A61B5/0215 , G01L1/22 , G01L27/00
CPC分类号： A61B5/0215 , G01L1/2281 , G01L27/005
摘要： A pressure transducer compensation system for compensating an offset and adjusting the sensitivity of the pressure transducer to a predetermined level. A reusable cable (160) connected to a pressure monitor (14) is intended for use with a plurality of disposable pressure transducers (12). In one embodiment, a connector (150) of the reusable cable includes a CPU (70), which determines the offset and self-heating errors of the pressure transducer during the first 30 seconds it is energized, stores the corrections in its internal memory and compensates the output signal produced by the pressure transducer for those errors and for variations in ambient temperature. A gain-set resistor (56) is included in a male modular phone plug (202) of a disposable cable that is integrally connected to the pressure transducer, and is used by the compensation circuit to control the signal produced by the pressure transducer, compensating for the characteristic sensitivity of the device. In a second embodiment, the disposable cable includes an offset resistor (250), and the compensation system uses a charge balance modulator 9260) to produce a pulse width modulated signal that is compensated for both the offset and characteristic sensitivity of the pressure transducer.
摘要翻译： 一种用于补偿偏移并将压力传感器的灵敏度调整到预定水平的压力传感器补偿系统。 连接到压力监视器（14）的可重复使用的电缆（160）旨在与多个一次性压力换能器（12）一起使用。 在一个实施例中，可重复使用的电缆的连接器（150）包括CPU（70），其确定压力换能器在其被激励的前30秒期间的偏移和自加热误差，将校正存储在其内部存储器中， 补偿由压力传感器产生的这些误差和环境温度变化所产生的输出信号。 增益设置电阻器（56）包括在一体式连接到压力传感器的一次性电缆的阳型模块化电话插头（202）中，并由补偿电路用于控制由压力传感器产生的信号，补偿 用于器件的特性灵敏度。 在第二实施例中，一次性电缆包括偏移电阻器（250），并且补偿系统使用电荷平衡调制器9260）来产生补偿压力传感器的偏移和特性灵敏度的脉宽调制信号。
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公开(公告)号：US5269311A
公开(公告)日：1993-12-14
申请号：US881726
申请日：1992-05-11
IPC分类号： A61B5/0215 , G01L1/22 , G01L27/00 , A61B5/00
CPC分类号： G01L1/2281 , A61B5/0215 , G01L27/002
摘要： Disclosed is a method of compensating any of a plurality of different pressure transducers for their characteristic pressure sensitivity, zero pressure offset, and self-heating error. The method comprises selecting a gain resistor that adjusts the gain of an output signal of the pressure transducer in use so that the pressure transducer appears as an ideal pressure transducer to a pressure monitor. The self-heating error is compensated by measuring an initial bridge voltage that drives the transducer and an initial output signal of the pressure transducer when the transducer is first energized. After a period of time a second bridge voltage and a second output signal are determined. The self-heating error is determined as a function of the difference between the initial and second values. The zero pressure offset is compensated by determining the output signal of the pressure transducer at zero gauge pressure after the pressure has been compensated for the self-heating error.
摘要翻译： 公开了一种补偿多个不同压力传感器的特性压力敏感性，零压力偏移和自发热误差的方法。 该方法包括选择增益电阻器，其调节在使用中的压力传感器的输出信号的增益，使得压力传感器作为理想的压力传感器出现到压力监视器。 当传感器首次通电时，通过测量驱动换能器的初始电桥电压和压力传感器的初始输出信号来补偿自加热误差。 一段时间后，确定第二桥电压和第二输出信号。 自发热误差被确定为初始值和第二值之间的差值的函数。 零压力补偿通过在压力已经补偿自加热误差之后确定压力传感器在零表压下的输出信号来补偿。
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公开(公告)号：US4936542A
公开(公告)日：1990-06-26
申请号：US328253
申请日：1989-03-27
CPC分类号： F16K7/12 , A61M39/225
摘要： A valve for selectively controlling flow within a fluid line between a relatively low capillary flow rate and a flushing flow. A flush valve (10) comprises a base (14) and a cover (16) that secures an elastomeric membrane (18) in place over a flow path (32) formed in the base. The flow path includes an inlet passage (34) connected in fluid communication to an outlet passage (50) by a capillary groove (38). The membrane seals over the capillary groove to define a capillary passage (48), which restricts fluid flow through the flush valve to the capillary flow rate. A user may selectively enable the relatively greater fluid flow through the device by deforming the membrane away from the capillary groove, thereby creating a relatively larger flushing flow passage (66). The flushing flow of fluid through the region of the capillary groove serves to carry away any obstruction that may be present in the groove or downstream of the flush valve.
摘要翻译： 一种用于选择性地控制在相对低的毛细管流率和冲洗流之间的流体管线内的流动的阀。 冲洗阀（10）包括基部（14）和盖（16），所述盖（16）将弹性体膜（18）固定在形成在基部中的流动路径（32）上的适当位置。 流路包括通过毛细管沟槽（38）与出口通道（50）流体连通地连接的入口通道（34）。 膜密封在毛细管槽上以限定毛细通道（48），其限制流过冲洗阀的流体流过毛细管流量。 用户可以通过使膜远离毛细管槽而使选择性地启用相对较大的流体流过装置，从而产生相对较大的冲洗流动通道（66）。 通过毛细管槽的区域的流体的冲洗流动用于携带可能存在于凹槽中或冲洗阀下游的任何阻塞物。
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