公开(公告)号：US4628302A

公开(公告)日：1986-12-09

申请号：US651047

申请日：1984-09-14

申请人： A. Brinkley Barr ,  D. Craig Edwards

发明人： A. Brinkley Barr ,  D. Craig Edwards

IPC分类号： G01F23/24 ,  G08B21/00

CPC分类号： G01F23/241

摘要： A detector system for sensing the presence, or absence, of electrically-conductive liquid in contact with two probe members. The system includes switchable voltage sources to selectively establish a potential across capacitors connected to the probe members, and detection systems for sensing the magnitudes of charges on the capacitors. The magnitudes of the sampled charge at given intervals is indicative of the presence, or absence, of ionic liquid in contact with the probe members.

摘要翻译： 用于感测与两个探针构件接触的导电液体的存在或不存在的检测器系统。 该系统包括可切换的电压源，以选择性地建立连接到探针构件的电容器两端的电位，以及用于感测电容器上的电荷量的检测系统。 以给定间隔的采样电荷的大小表示与探针构件接触的离子液体的存在或不存在。

公开(公告)号：US5206650A

公开(公告)日：1993-04-27

申请号：US755085

申请日：1991-09-05

申请人： Jonathan J. Parle ,  Todd E. Holmdahl ,  A. Brinkley Barr

发明人： Jonathan J. Parle ,  Todd E. Holmdahl ,  A. Brinkley Barr

IPC分类号： H03M1/38 ,  H03M1/52

CPC分类号： H03M1/38

摘要： A charge-controlled integrating successive-approximation analog-to-digital converter first stores a charge proportional to an unknown voltage in a manner similar to a dual-slope integrating ADC, and thereafter a successive-approximation binary search sequence algorithm is applied to the integrator to determine digital bits representative of the unknown voltage. The result is a relatively simple and inexpensive ADC having high resolution and accuracy, and comparatively fast conversion rates, and exhibiting low power consumption, high noise rejection, and multiple-speed versatility. The preferred embodiment described is a 16-bit ADC with less than 20 millisecond conversion time.

公开(公告)号：USRE34428E

公开(公告)日：1993-11-02

申请号：US846442

申请日：1992-03-06

申请人： Richard E. George ,  A. Brinkley Barr ,  Thomas W. Wiesmann, deceased

发明人： Richard E. George ,  A. Brinkley Barr ,  Thomas W. Wiesmann, deceased

IPC分类号： H03M1/06 ,  H03M1/52

CPC分类号： H03M1/0663 ,  H03M1/52

摘要： There is provided according to the invention a method and apparatus for eliminating or minimizing the error due to amplifier offset or drift error in an integrating dual slope analog-to-digital converter. The converter is provided with a switching and control arrangement whereby the integrating capacitor is charged for one-half of the predetermined charging time as a function of the sum of the levels of the unknown signal and the error signal. The integrating capacitor is charged for the remaining half of the predetermined time period as a function of the difference of the levels of the unknown signal and the error signal so that the capacitor reaches a level of charge which is a function of the level of the unknown signal substantially unaffected by the level of the error signal. During deintegration of the capacitor by a reference signal the polarity of the error signal is inverted during successive or consecutive deintegration cycles so that the error voltage is self-cancelling in two successive deintegrations and is eliminated from the summed digital output.

公开(公告)号：US4745893A

公开(公告)日：1988-05-24

申请号：US937553

申请日：1986-12-03

申请人： Kim Wesley Atherton ,  A. Brinkley Barr ,  Thomas M. Harmon ,  Michael M. Van Schoiack ,  Marvin E. Vandehey ,  Richard D. Weyerts ,  Charles R. Clow ,  Patrick H. Mawet

发明人： Kim Wesley Atherton ,  A. Brinkley Barr ,  Thomas M. Harmon ,  Michael M. Van Schoiack ,  Marvin E. Vandehey ,  Richard D. Weyerts ,  Charles R. Clow ,  Patrick H. Mawet

IPC分类号： F01M11/12 ,  G01F23/26 ,  F01M1/00

CPC分类号： F01M11/12 ,  G01F23/263

摘要： An oil level sensor includes a sensor body adapted to be mounted to the block or casing of an oil-containing reservoir. A probe including a pair of electrodes forming a capacitor extends from the sensor body so that the capacitor will be at least partially immersed in the oil to detect the level thereof. At least one of the electrodes is insulated so that the apparent capacitance of the capacitor is relatively insensitive to any change in the conductivity of the oil at high temperatures. Circuitry is provided in response to the capacitance of the capacitor for signalling the level of the oil, which capacitance is a function of the oil level. The sensor body is mounted to the block by external threads on the probe. The electrodes of the probe extend proximally past the threads to provide an increased capacitance for the sensor. The electrodes of the probe are concentric and the inner electrode is supported at both ends to reduce fatigue. Circuitry is also provided for automatically testing the proper operation of the sensor.

摘要翻译： 油位传感器包括适于安装到含油储存器的块体或壳体上的传感器主体。 包括形成电容器的一对电极的探针从传感器体延伸，使得电容器将至少部分地浸入油中以检测其水平。 电极中的至少一个被绝缘，使得电容器的视在电容对于在高温下的油的导电性的任何变化都相对不敏感。 响应于用于发信号电平的电容器的电容而提供电路，该电容是油位的函数。 传感器主体通过探头上的外螺纹安装到块上。 探针的电极向近端延伸通过螺纹，以为传感器提供增加的电容。 探针的电极是同心的，内电极在两端被支撑，以减少疲劳。 还提供电路用于自动测试传感器的正确操作。