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公开(公告)号：US6164132A
公开(公告)日：2000-12-26
申请号：US145675
申请日：1998-09-02
申请人： Andrew M. Matulek
发明人： Andrew M. Matulek
CPC分类号： G01F23/266 , G01F23/265 , G01F23/268
摘要： A capacitive liquid level indicator having a capacitive sensor array superposed on each side of a dielectric substrate, wherein the sensor signal detection electronics are located immediately adjacent each capacitive sensor. These provisions result in high sensitivity of detection of submergence in the liquid, as well as essentially eliminating parasitic electric fields. The preferred capacitive sensors are interdigitated capacitors, and the preferred sensor signal detection circuit is an RC bridge and a comparator, wherein the comparator senses a voltage difference in the RC bridge between a sensor resistor and sensor capacitor of a first leg thereof and a reference resistor and reference capacitor of a second leg thereof. It is preferred for the capacitive liquid level indicator to be coated with a low dielectric conformal coating to thereby insulate the electronic components (inclusive of the capacitive sensors) thereof with respect to the liquid into which it is submerged. The sensitivity of the capacitive liquid level sensor according to the present invention is extremely high; as a result, a reference capacitive sensor is obviated, and there are no false indications of liquid due to any film of the liquid clinging to an exposed portion of the capacitive liquid level sensor.
摘要翻译： 一种电容液面指示器，其具有叠加在电介质基板的每一侧上的电容式传感器阵列，其中所述传感器信号检测电子设备紧邻每个电容式传感器。 这些规定导致液体中淹没检测的高灵敏度，并且基本上消除了寄生电场。 优选的电容式传感器是交错电容器，优选的传感器信号检测电路是RC桥和比较器，其中比较器感测传感器电阻器和第一支路的传感器电容器之间的RC桥的电压差和参考电阻 和其第二支脚的参考电容器。 优选的是，电容式液面指示器涂覆有低介电共形涂层，从而使其电子部件（包括电容传感器）相对于其被浸没的液体绝缘。 根据本发明的电容式液位传感器的灵敏度非常高; 结果，消除了参考电容传感器，并且由于液体粘附到电容式液位传感器的暴露部分的任何膜，没有液体的错误指示。
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公开(公告)号：US06688994B2
公开(公告)日：2004-02-10
申请号：US10192587
申请日：2002-07-11
IPC分类号： A63B6900
CPC分类号： A63B69/0002 , A63B69/0079 , A63B2069/0008 , A63B2225/093
摘要： A batting aid that may easily be installed upon fixed or temporary structures, made up of a main frame that slidably supports a tube which in turn supports a ball for a batter to hit. The ball is fixed to the tube by a wire cable that extends through the ball, and is in turn mounted to the tube. The tube is height adjustable so that batters of differing stature and ages can easily practice upon balls at varied heights. The assembly is strong in construction so that a practicing batter is able to hit the ball hard and not cause damage or require another player to throw balls over the plate or return balls to the batter.
摘要翻译： 可以容易地安装在固定或临时结构上的击球辅助装置，该主体框架由可滑动地支撑管的主框架构成，后者又支撑一个球以供击球。 球通过延伸穿过球的线缆固定到管上，并且依次安装到管。 管的高度可调节，使不同身材和年龄的面糊可以轻松地在不同高度的球上练习。 组装结构坚固，使得练习面糊能够硬地击球，不会造成伤害，或者要求另一个玩家将球扔在板上或将球返回面糊。
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公开(公告)号：US06578416B1
公开(公告)日：2003-06-17
申请号：US09658755
申请日：2000-09-08
IPC分类号： G01F2300
CPC分类号： G01F23/268 , G01F23/265 , G01F23/266
摘要： A self-compensating fluid level sensor is described, including a dual array of capacitive sensors on a dielectric substrate, the dual array of sensors forming multiple sensor pairs. Multiple signal detection circuits including comparators are configured to compare the capacitance of a first sensor pair with a second sensor pair. The internal capacitance comparisons allow the fluid level sensor to compensate for variations in the dielectric of the fluid being measured, as well as for manufacturing and materials variations that affect capacitive sensing. The passive level sensor also provides a platform for providing additional circuitry for providing additional information regarding the liquid, such as liquid composition.
摘要翻译： 描述了一种自补偿液位传感器，其包括电介质基底上的电容式传感器的双重阵列，形成多个传感器对的双重传感器阵列。 包括比较器的多个信号检测电路被配置为比较第一传感器对与第二传感器对的电容。 内部电容比较允许液位传感器补偿被测流体的电介质的变化，以及影响电容感测的制造和材料变化。 无源液位传感器还提供了一个平台，用于提供附加电路，以提供关于液体的附加信息，例如液体组成。
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