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1. 发明授权

US06240778B1 Liquid level point switch sensor 失效
标题翻译：液位开关传感器
公开(公告)号：US06240778B1
公开(公告)日：2001-06-05
申请号：US09033271
申请日：1998-03-02
申请人： Alan R. Hannan , Thomas M. Nickolin , Bryan H. McQuitty , William E. Atkinson , J. Jacob Noble
发明人： Alan R. Hannan , Thomas M. Nickolin , Bryan H. McQuitty , William E. Atkinson , J. Jacob Noble
IPC分类号： G01F2300
CPC分类号： G01F23/268 , G01F23/265 , G01F23/266
摘要： A liquid level sensor for detecting when an upper level of a liquid in a reservoir has reached a predetermined or critical point in the reservoir. The sensor includes a first input plate and a second input plate disposed concentrically relative to the first input plate. Each of the input plates are further of a shape such that an imaginary line extending through the centroid of the first input plate divides each of the first and second input plates approximately in half. An output or receiver plate is positioned closely adjacent the two input plates. The input plates are further disposed in the reservoir such that the centroid is at the predetermined or critical level in the reservoir. The two input plates are alternately electrically excited and the signals coupled to the output plate are detected and repeatedly compared against one another. The output signals will differ in magnitude because of the difference in the dielectric constant of air and the liquid in the reservoir. As the liquid level in the reservoir approaches the predetermined or critical point, the output signals coupled onto the output plate begin approaching one another. When the liquid level reaches the predetermined or critical point, the output signals are approximately equal in magnitude. A microcontroller detects this condition and generates a signal in response thereto. The performance or accuracy of the sensor is independent of changes in the dielectric constant of the fluid and, in some cases, is not affected by tilting or other changes in the orientation of the reservoir which might otherwise affect the accuracy of measurements taken by other forms of liquid level sensing devices.
摘要翻译：一种液位传感器，用于检测储存器中的液体的上部水位何时达到储存器中的预定或临界点。传感器包括相对于第一输入板同心设置的第一输入板和第二输入板。每个输入板还具有这样的形状，使得延伸穿过第一输入板的重心的假想线将第一和第二输入板中的每一个大致分成两半。输出或接收板位于两个输入板附近。输入板进一步设置在储存器中，使得质心处于储存器中的预定或临界水平。两个输入板交替电激励，并且耦合到输出板的信号被检测并重复地相互比较。由于空气和储层中液体的介电常数不同，输出信号的大小不同。当储存器中的液位接近预定或临界点时，耦合到输出板上的输出信号开始彼此接近。当液面达到预定或临界点时，输出信号大致相等。微控制器检测这种情况并响应于此产生信号。传感器的性能或精度与流体的介电常数的变化无关，并且在某些情况下不会受到储层取向的倾斜或其他变化的影响，否则可能会影响其他形式的测量精度的液位感测装置。

2. 发明授权

US6018335A Programmable keyboard and method therefor 失效
标题翻译：可编程键盘及其方法
公开(公告)号：US6018335A
公开(公告)日：2000-01-25
申请号：US914329
申请日：1997-08-19
申请人： Raymond V. Onley , Alan R. Hannan
发明人： Raymond V. Onley , Alan R. Hannan
IPC分类号： G06F3/023 , G09G3/26
CPC分类号： G06F3/023
摘要： An apparatus adapted to be coupled between a keyboard and a computer to enable a user to define desired keys as coded keys which are associated with MACROS defined by the user. The apparatus includes a microcontroller and an electrically erasable, programmable read only memory (EEPROM) which monitors codes transmitted from the keyboard and is placed in a programming mode when a predetermined program code is received from the keyboard. Once in the program mode, the next key depressed by the user is denoted as a coded key and the following keys depressed by the user are designated as a user programmed MACRO associated with the coded key. The apparatus stores this information in the EEPROM and thereafter when the coded key is depressed by the user the associated MACRO is generated and transmitted to the computer. The apparatus forms a very compact, relatively inexpensive means for enabling conventional keyboards to function as programmable keyboards. In an alternative preferred embodiment, editing and creation of the MACROS can be accomplished by receiving information from the computer through the use of a software program which enables the user to more conveniently enter and exit the programming mode, as well as make necessary edits to previously stored MACROS.
摘要翻译：一种适于耦合在键盘和计算机之间以使用户能够将所需键定义为与由用户定义的MACROS相关联的编码密钥的装置。该装置包括微控制器和电可擦除可编程只读存储器（EEPROM），其监视从键盘发送的代码，并且当从键盘接收到预定的程序代码时将其置于编程模式。一旦处于程序模式，用户按下的下一个键被表示为编码密钥，并且用户按下的下列键被指定为与编码密钥相关联的用户编程MACRO。该装置将该信息存储在EEPROM中，此后当用户按下编码密钥时，生成相关联的MACRO并将其发送到计算机。该装置形成了一种非常紧凑的，相对便宜的手段，用于使常规键盘能够用作可编程键盘。在另一优选实施例中，MACROS的编辑和创建可以通过使用软件程序从计算机接收信息来实现，该软件程序使得用户能够更方便地进入和退出编程模式，并且对先前的存储MACROS。

3. 发明授权

US5406843A Digital liquid level sensing apparatus 失效
公开(公告)号：US5406843A
公开(公告)日：1995-04-18
申请号：US143834
申请日：1993-10-27
申请人： Alan R. Hannan , Thomas M. Nickolin
发明人： Alan R. Hannan , Thomas M. Nickolin
IPC分类号： G01F23/26
CPC分类号： G01F23/266 , G01F23/265 , G01F23/268
摘要： A digital liquid level sensing apparatus for detecting variations in the dielectric of a substance being sensed. The apparatus includes a capacitive element array including a plurality of individual (i.e., segmented) input plates positioned along an axis of measurement of a fluid to be detected. The array also includes a common output plate having a length sufficient to span the entire accumulated length of the input plates. A controller sequentially applies DC excitation pulses to the input plates which cause a series of output currents to be coupled onto the output plate. The output currents are input to a current-to-voltage amplifier which generates a series of corresponding analog output voltages. The analog output voltages are then input to a peak voltage detector circuit to generate a series of peak voltage signals representative of the magnitudes of the analog output voltages. The controller converts each of the peak voltage signals into a corresponding digital value and stores each of the digital values in an on-board memory. The controller then sequentially compares each of the values against at least one predetermined reference value indicative of an output produced by an input plate disposed in air until a predetermined difference is detected between the reference value and any one of the stored digital values. This indicates a predetermined difference in the dielectric, thus indicating that a corresponding input plate is at least partially submerged in fluid.

4. 发明授权

US5613399A Method for liquid level detection 失效
标题翻译：液位检测方法
公开(公告)号：US5613399A
公开(公告)日：1997-03-25
申请号：US422859
申请日：1995-04-17
申请人： Alan R. Hannan , Thomas M. Nickolin
发明人： Alan R. Hannan , Thomas M. Nickolin
IPC分类号： G01F23/26
CPC分类号： G01F23/265 , G01F23/266 , G01F23/268
摘要： A digital liquid level sensing apparatus and method for detecting variations in the dielectric of a substance being sensed. The apparatus includes a capacitive element array which is disposed in a fluid to be measured and which includes a plurality of individual (i.e., segmented) input plates positioned along an axis of measurement of the fluid to be detected. The array also includes a common output plate having a length sufficient to span the entire accumulated length of the input plates. A controller sequentially applies DC excitation pulses to the input plates which cause a series of output currents to be coupled onto the output plate. The output currents are input to a current-to-voltage amplifier which generates a series of corresponding analog output voltages. The analog output voltages are then input to a peak voltage detector circuit to generate a series of peak voltage signals representative of the magnitudes of the analog output voltages. The controller converts each of the peak voltage signals into a corresponding digital value and stores each of the digital values in an on-board memory. The controller then sequentially compares each of the values against at least one predetermined reference value indicative of an output produced by an input plate disposed in air until a predetermined difference is detected between the reference value and any one of the stored digital values. This indicates a predetermined difference in the dielectric, thus indicating that a corresponding input plate is at least partially submerged in fluid.
摘要翻译：一种数字液面感测装置和方法，用于检测被感测物质的电介质的变化。该装置包括电容元件阵列，该电容元件阵列设置在要测量的流体中，并且包括沿着待检测流体的测量轴定位的多个单独（即，分段的）输入板。阵列还包括具有足以跨越输入板的整个累积长度的长度的公共输出板。控制器顺序地向输入板施加DC激励脉冲，这些脉冲使一系列输出电流耦合到输出板上。输出电流被输入到产生一系列对应的模拟输出电压的电流 - 电压放大器。然后将模拟输出电压输入到峰值电压检测器电路以产生表示模拟输出电压的幅度的一系列峰值电压信号。控制器将每个峰值电压信号转换成对应的数字值，并将每个数字值存储在板上存储器中。然后，控制器顺序地将每个值与至少一个指定由设置在空气中的输入板产生的输出的预定参考值进行比较，直到在参考值和存储的数字值中的任何一个之间检测到预定差值。这表示电介质中的预定差异，因此表示对应的输入板至少部分地浸没在流体中。

5. 发明授权

US6138508A Digital liquid level sensing apparatus 失效
标题翻译：数字液位感测装置
公开(公告)号：US6138508A
公开(公告)日：2000-10-31
申请号：US824046
申请日：1997-03-21
申请人： Alan R. Hannan , Thomas M. Nickolin
发明人： Alan R. Hannan , Thomas M. Nickolin
IPC分类号： G01F23/26
CPC分类号： G01F23/266 , G01F23/265 , G01F23/268
摘要： A digital liquid level sensing apparatus for detecting variations in the dielectric of a substance being sensed. The apparatus includes a capacitive element array including a plurality of individual (i.e., segmented) input plates positioned along an axis of measurement of a fluid to be detected. The array also includes a common output plate having a length sufficient to span the entire accumulated length of the input plates. A controller sequentially applies DC excitation pulses to the input plates which cause a series of output currents to be coupled onto the output plate. The output currents are input to a current-to-voltage amplifier which generates a series of corresponding analog output voltages. The analog output voltages are then input to a peak voltage detector circuit to generate a series of peak voltage signals representative of the magnitudes of the analog output voltages. The controller converts each of the peak voltage signals into a corresponding digital value and stores each of the digital values in an on-board memory. The controller then sequentially compares each of the values against at least one predetermined reference value indicative of an output produced by an input plate disposed in air until a predetermined difference is detected between the reference value and any one of the stored digital values. This indicates a predetermined difference in the dielectric, thus indicating that a corresponding input plate is at least partially submerged in fluid.
摘要翻译：一种数字液面感测装置，用于检测被感测物质的电介质的变化。该装置包括电容元件阵列，其包括沿着待检测流体的测量轴定位的多个单独的（即，分段的）输入板。阵列还包括具有足以跨越输入板的整个累积长度的长度的公共输出板。控制器顺序地向输入板施加DC激励脉冲，这些脉冲使一系列输出电流耦合到输出板上。输出电流被输入到产生一系列对应的模拟输出电压的电流 - 电压放大器。然后将模拟输出电压输入到峰值电压检测器电路以产生表示模拟输出电压的幅度的一系列峰值电压信号。控制器将每个峰值电压信号转换成对应的数字值，并将每个数字值存储在板上存储器中。然后，控制器顺序地将每个值与至少一个指定由设置在空气中的输入板产生的输出的预定参考值进行比较，直到在参考值和存储的数字值中的任何一个之间检测到预定差值。这表示电介质中的预定差异，因此表示对应的输入板至少部分地浸没在流体中。

6. 发明授权

US06125696A Digital liquid level sensing apparatus 失效
标题翻译：数字液位感测装置
公开(公告)号：US06125696A
公开(公告)日：2000-10-03
申请号：US44419
申请日：1998-03-19
申请人： Alan R. Hannan , Thomas M. Nickolin , Ted W. Lewis
发明人： Alan R. Hannan , Thomas M. Nickolin , Ted W. Lewis
IPC分类号： G01F23/26
CPC分类号： G01F23/266 , G01F23/265 , G01F23/268
摘要： A digital liquid level sensing apparatus for detecting variations in the dielectric of a substance being sensed, to thereby provide a signal indicative of the level of the liquid being sensed in relation to a known full level. The apparatus includes a reservoir having an output plate and an input plate assembly associated therewith. The input plate assembly includes a plurality of independently electrically excitable input plates which transmit a signal through the liquid being sensed to the output plate. The signals from the output plate are processed and a determination is made as to the level of liquid in the reservoir relative to a known full level. If the input plate assembly is located against the exterior surface of one wall of the reservoir, then both of the interior and exterior portions of that particular wall should be devoid of any metallic surface. In an alternative embodiment, a discardable interior reservoir is provided which fits nestably within the reservoir of the sensor. The interior reservoir is particularly useful for measuring water-based bodily fluids such as urine, where it may be desirable to discard just the reservoir after use.
摘要翻译：一种数字液面感测装置，用于检测被感测物质的电介质的变化，从而提供指示相对于已知全部水平被感测的液体的水平的信号。该装置包括具有输出板和与其相关联的输入板组件的储存器。输入板组件包括多个独立地可电激励的输入板，其将通过所感测的液体的信号传输到输出板。来自输出板的信号被处理，并且确定储存器中的液体相对于已知满量的水平。如果输入板组件位于储存器的一个壁的外表面上，则该特定壁的内部和外部部分都应该没有任何金属表面。在替代实施例中，提供可分离的内部储存器，其可嵌套地安装在传感器的储存器内。内部储存器特别可用于测量诸如尿液之类的水基体液，其中可能期望在使用后仅丢弃储存器。

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