公开(公告)号：WO2004097761A1

公开(公告)日：2004-11-11

申请号：PCT/US2003/025870

申请日：2003-08-19

Applicant: STANDEX INTERNATIONAL CORPORATION ,  CHAMBERLIN, Edward, R. ,  LINSLEY, Paul

Inventor： CHAMBERLIN, Edward, R. ,  LINSLEY, Paul

IPC: G08B21/00

CPC classification number: G01F23/242 ,  G01F23/243 ,  G01F23/60 ,  G01F23/683

Abstract: A liquid level sensor apparatus and a method of using thereof for determining the level of a conductive liquid held within a container, wherein the container is subject to the accumulation of residue as a consequence of the conductive liquid contained therein. The liquid level sensor includes a sensor part which has a voltage; a ground connection having an electrical polarity; a circumferential ring having a bias voltage opposite in polarity to the ground connection and a voltage corresponding to that of the sensor attached around the sensor; a float which is buoyant on the conductive liquid; and a conductive tip attached to the top of the float, the conductive tip being conductive with the sensor end when in at least one predetermined position.

Abstract translation: 一种液位传感器装置及其使用方法，用于确定容纳在容器内的导电液体的液位，其中容器由于其中所含的导电液体而被残留物积聚。 液位传感器包括具有电压的传感器部分; 具有电极性的接地连接; 周向环，其具有与接地连接极性相反的偏置电压和对应于安装在传感器周围的传感器的电压的电压; 漂浮在导电液体上的浮子; 以及附接到浮子顶部的导电尖端，当处于至少一个预定位置时，导电尖端与传感器端部导电。

公开(公告)号：WO1992020050A1

公开(公告)日：1992-11-12

申请号：PCT/US1992002329

申请日：1992-03-24

Applicant: STANDEX INTERNATIONAL CORPORATION

Inventor： STANDEX INTERNATIONAL CORPORATION ,  GOEKLER, Lewis, E. ,  CHAMBERLIN, Edward, R.

IPC: G08B21/00

CPC classification number: G01F23/265 ,  G01F23/266 ,  G01F23/268

Abstract: The present invention utilizes capacitive principles to sense the level of a liquid contained within a receptacle. As a liquid rises and falls in the container, the dielectric effect of the liquid changes the effective capacitance of a sensing capacitor (C4) which is detected by electronic circuitry coupled to the sensor. One plate of the sensor capacitor is a probe (C9) disposed within a receptacle while a grounded conductive portion of the receptacle is a second plate of the capacitor. The liquid within the receptacle acts as a dielectric between the plates.

Abstract translation: 本发明利用电容原理来感测容纳在容器中的液体的水平。 随着液体在容器中的上升和下降，液体的介电效应改变了由耦合到传感器的电子电路检测到的感测电容器（C4）的有效电容。 传感器电容器的一个板是设置在插座内的探针（C9），而接收器的接地导电部分是电容器的第二板。 容器内的液体用作板之间的电介质。

公开(公告)号：WO2011071518A1

公开(公告)日：2011-06-16

申请号：PCT/US2010/003097

申请日：2010-12-07

Applicant: STANDEX INTERNATIONAL CORPORATION ,  CHAMBERLIN, Edward, R.

Inventor： CHAMBERLIN, Edward, R.

IPC: F04B49/00

CPC classification number: H03K17/97 ,  F16L37/0985 ,  F16L2201/10

Abstract: An electronic sensor for determining if a metal hose connector is fully snapped into its mating plastic connector. This sensor detects the metal hose in position by having a coil in position over the plastic connector and at the end of the metal hose when it is in correct position. The metal of the hose interacts with the magnetic field of the coil to both increase the inductance and greatly reduce the 'Q' because of the "shorted turn" effect of the round metal hose. The sensor inherently detects faults in its own circuit because of the comparator voltage window. Faults such as an open coil, oscillator or rectifier failure will appear at the output as "hose disconnected" which is the desirable failure mode. The invention also detects external faults because of the two non-zero, non-line voltages seen during normal operation.

Abstract translation: 用于确定金属软管连接器是否完全卡入其配合的塑料连接器中的电子传感器。 该传感器在金属软管处于正确位置时，通过使线圈位于塑料连接器上方以及金属软管的端部处，来检测金属软管的位置。 软管的金属与线圈的磁场相互作用，以增加电感，并由于圆形金属软管的“短路转弯”效应，大大降低了“Q”。 由于比较器电压窗口，传感器固有地检测自身电路中的故障。 在输出端将出现诸如开路线圈，振荡器或整流器故障之类的故障，因为“软管断开”是所需的故障模式。 由于在正常工作期间看到的两个非零非线性电压，本发明还检测外部故障。

公开(公告)号：WO2005106818A2

公开(公告)日：2005-11-10

申请号：PCT/US2005/010413

申请日：2005-03-29

Applicant: STANDEX INTERNATIONAL CORPORATION ,  CHAMBERLIN, Edward, R.

Inventor： CHAMBERLIN, Edward, R.

IPC: G08B21/00

CPC classification number: G01F23/683 ,  G01F23/242 ,  G01F23/243

Abstract: A liquid level sensor for conductive liquids having a virtual bias ring to prevent false "full" indications. The sensor is an inexpensive conductive probe that can be installed in any tank or container used to contain a conductive liquid. The build up of residue such as conductive fluid that fails to drain on the inside of the container wall and probe pieces can cause a short between the probe and ground. This situation will result in falsely showing that the level of the liquid being measured is at least at the minimum predetermined requirement even though the actual level may be far less than that amount. The bias ring is a virtual "ring" that is provided around the insulating base of the sensing probe between the probe tip and the top inside of the tank. The probe is then given a charge (positive for negative ground systems) which interrupts the current path between the sensing tip of the probe and ground via the conducting residue. Consequently, the sensor will read correctly despite the conductive residue that may be present.

Abstract translation: 一种用于导电液体的液位传感器，其具有虚拟偏置环以防止假的“全”指示。 传感器是便宜的导电探头，可以安装在任何用于容纳导电液体的罐或容器中。 残留物的积聚，例如不能在容器壁和探针片内部排出的导电流体可能导致探针和地面之间的短路。 这种情况将导致错误地显示待测液体的水平至少达到最低预定要求，即使实际水平可能远远小于该量。 偏置环是虚拟的“环”，其设置在探针尖端和罐顶部之间的感测探针的绝缘基底周围。 然后向探头提供电荷（负接地系统的正极），其中断通过导电残渣的探头的感测尖端和接地之间的电流路径。 因此，尽管可能存在导电残留物，传感器仍将正确读取。

公开(公告)号：EP1614081A1

公开(公告)日：2006-01-11

申请号：EP03816822.5

申请日：2003-08-19

Applicant: Standex International Corporation

Inventor： CHAMBERLIN, Edward, R. ,  LINSLEY, Paul

IPC: G08B21/00

CPC classification number: G01F23/242 ,  G01F23/243 ,  G01F23/60 ,  G01F23/683

Abstract: A liquid level sensor apparatus and a method of using thereof for determining the level of a conductive liquid held within a container, wherein the container is subject to the accumulation of residue as a consequence of the conductive liquid contained therein. The liquid level sensor includes a sensor part which has a voltage; a ground connection having an electrical polarity; a circumferential ring having a bias voltage opposite in polarity to the ground connection and a voltage corresponding to that of the sensor attached around the sensor; a float which is buoyant on the conductive liquid; and a conductive tip attached to the top of the float, the conductive tip being conductive with the sensor end when in at least one predetermined position.