公开(公告)号：US4856317A

公开(公告)日：1989-08-15

申请号：US189333

申请日：1988-05-02

申请人： John Pidorenko ,  Alan R. Hoffman ,  Robert F. Hodge ,  Wei-Min Wang

发明人： John Pidorenko ,  Alan R. Hoffman ,  Robert F. Hodge ,  Wei-Min Wang

IPC分类号： G01L27/00

CPC分类号： G01L27/002

摘要： A system and method for initializing and calibrating a fiber optic pressure transducer so that a measured intensity of light which varies as a function of pressure can be accurately translated to the value of pressure which produces that value of light intensity. The transducer includes an enclosed sensor tip having a diaphragm which is exposed to atmospheric pressure on the inside and the pressure to be determined on the outside as measurements are taken, the resulting pressure differential producing a related attenuation in light intensity. Calibration according to the present invention is performed by exposing the diaphragm to atmospheric pressure on the outside and sub-atmospheric pressure on the inside while transmitting light through the fiber in the usual manner. The sub-atmospheric pressure is changed gradually as simultaneous measurements are made of the intensity of light returned through the fiber and the actual value of the sub-atmospheric pressure at a number of discrete times. The paired values are stored in a look-up table which is subsequently used to determine unknown pressures from matched values of measured light intensity.

摘要翻译： 用于初始化和校准光纤压力传感器的系统和方法，使得可以将测量的作为压力函数变化的光强度转化为产生该光强值的压力值。 换能器包括封闭的传感器尖端，其具有在测量时暴露于内部的大气压力和要在外部确定的压力的隔膜，所得到的压力差产生光强度中的相关衰减。 根据本发明的校准是通过将隔膜暴露在外部的大气压力和内部的副大气压力下进行的，同时以通常的方式透过光纤。 随着同时测量通过光纤返回的光的强度和多个离散时间的次大气压力的实际值，副大气压逐渐变化。 成对值存储在查找表中，随后用于从测量的光强度的匹配值确定未知压力。

公开(公告)号：US4157477A

公开(公告)日：1979-06-05

申请号：US840901

申请日：1977-10-11

申请人： Ronald J. Kall ,  Alan R. Hoffman

发明人： Ronald J. Kall ,  Alan R. Hoffman

IPC分类号： G01B11/04 ,  G01D5/34 ,  G01N21/30

CPC分类号： G01B11/046 ,  G01D5/342

摘要： A detector for detecting the position of the edges of a moving strip which produces an electrical signal proportional to the transverse position of the strip. A light source shines on the edge of the strip. A smooth surfaced sheet of translucent plastic material containing a fluorescent pigment is placed below the edge and opposite the light source. The pigment in the portion of the sheet of the strip and exposed to the light source outside the edge fluoresces producing light energy in amounts proportional to the area of the sheet exposed to the light source. This light energy travels between the sheet surfaces to the edges of the sheet. Photoelectric sensitive means are operatively associated with the edges of the sheet for producing an electrical signal proportional to the amount of fluorescent generated light energy which signal can be amplified to control power means for respositioning the strip.

摘要翻译： 用于检测移动条的边缘的位置的检测器，其产生与条的横向位置成比例的电信号。 光源照在条的边缘。 含有荧光颜料的透明塑料材料的光滑表面放置在边缘下方并与光源相对。 条带片材部分中的颜料暴露于边缘外部的光源发荧光，产生与暴露于光源的片材的面积成比例的光量。 该光能在片材表面之间传播到片材的边缘。 光电敏感装置可操作地与片材的边缘相关联，以产生与荧光产生的光能量成比例的电信号，该信号可被放大以控制用于重新定位条带的功率装置。

公开(公告)号：US4376026A

公开(公告)日：1983-03-08

申请号：US174593

申请日：1980-08-01

申请人： Alan R. Hoffman ,  Thomas J. Ryan

发明人： Alan R. Hoffman ,  Thomas J. Ryan

IPC分类号： G01N27/406 ,  G01N27/58

CPC分类号： G01N27/4065

摘要： Method and apparatus are disclosed for measuring and controlling the concentration of oxygen in a gas. A sensor (10) is provided having a zirconium dioxide wall (12). One side of the wall is exposed to a reference gas having a known oxygen concentration while the other side is exposed to a gas having the unknown oxygen concentration. An electrical potential is developed at the sensor output, where the magnitude of the potential is dependent upon the relative oxygen concentrations on either side of the sensor wall and the temperature of the wall. The reference gas is selected such that variations in the electrical potential due to temperature changes are minimized over the expected range of temperatures to which the sensor will be subjected during the oxygen concentration measurements and over the range of oxygen concentrations which must be measured.The sensor temperature is measured by measuring the resistance of the sensor, which varies directly with temperature. An oscillator (28) provides an AC signal which is applied to the sensor (10) such that the AC signal is superimposed on the DC sensor output and has a magnitude dependent upon the resistance and therefore the temperature of the sensor. The AC and DC components are isolated from one another by two filters (32, 34) and separately utilized as temperature and oxygen concentration indications.

摘要翻译： 公开了用于测量和控制气体中的氧浓度的方法和装置。 提供具有二氧化锆壁（12）的传感器（10）。 暴露于具有已知氧浓度的参考气体，而另一侧暴露于具有未知氧气浓度的气体的壁的一侧。 在传感器输出处产生电势，其中电位的大小取决于传感器壁两侧的相对氧浓度和壁的温度。 选择参考气体使得由于温度变化引起的电位变化在氧浓度测量期间以及在必须测量的氧浓度范围内将在传感器将经受的温度的预期范围内最小化。 通过测量传感器的电阻来测量传感器温度，传感器的温度随温度而变化。 振荡器（28）提供施加到传感器（10）的AC信号，使得AC信号叠加在DC传感器输出端上，并且具有取决于电阻和因此传感器温度的幅度。 AC和DC组件通过两个过滤器（32,34）彼此隔离，并分别用作温度和氧气浓度指示。