公开(公告)号：US07421895B1

公开(公告)日：2008-09-09

申请号：US11279928

申请日：2006-04-17

申请人： Joseph W. Caldwell

发明人： Joseph W. Caldwell

IPC分类号： G01F23/00

CPC分类号： G01F23/2962

摘要： A fluid level measuring system comprising a fluid level sensor is disclosed. The fluid level sensor may comprise a top or bottom mounted transducer and limited openings to enable accurate measurement of a fluid's depth while the fluid is moving. The fluid level measuring system may be calibrated without the use of calibration reflectors and may be used to retrofit prior art fluid level measuring systems. A control system may be used to control the fluid level sensor and interface the fluid level sensor to an external subsystem, such as a fuel gauge.

摘要翻译： 公开了一种包括液位传感器的液位测量系统。 流体液位传感器可以包括顶部或底部安装的换能器和有限的开口，以在流体运动时能够精确地测量流体的深度。 液位测量系统可以在不使用校准反射器的情况下进行校准，并可用于改进现有技术的液位测量系统。 可以使用控制系统来控制流体液位传感器并将流体液位传感器接合到诸如燃料计的外部子系统。

公开(公告)号：US06588271B2

公开(公告)日：2003-07-08

申请号：US09922313

申请日：2001-08-06

申请人： Joseph W. Caldwell

发明人： Joseph W. Caldwell

IPC分类号： G01F2332

CPC分类号： G01F23/56 ,  G01F23/40

摘要： A liquid level change indicator is described as an apparatus. which generates a visual indication when a liquid level in a controlled vessel has changed and indicates amount of change for a timed period. Operation of the instrument entails positioning the apparatus in the liquid containment vessel from a support chain. Positioning, is accomplished by a course chain adjustment, followed by a fine-threaded-nut adjustment. A float centering itself in a concentric circle sight gauge indicates initial correct monitoring position. Deviation from one of the concentric rings constitutes a liquid level change. Each concentric ring indicates a larger level change relative to the innermost sight ring per unit test time.

摘要翻译： 液位变化指示器被描述为装置。 当受控容器中的液位已经改变并且指示定时周期的变化量时，其产生视觉指示。 仪器的操作需要将设备从支撑链定位在液体容纳容器中。 定位是通过链条调整完成的，然后进行细螺纹螺母调整。 以同心圆测量仪为中心的浮球表示初始正确的监视位置。 与其中一个同心环的偏差构成液位变化。 每个同心圆指示相对于每单位测试时间的最内侧视环较大的电平变化。

公开(公告)号：US4984449A

公开(公告)日：1991-01-15

申请号：US376666

申请日：1989-07-03

申请人： Joseph W. Caldwell ,  Mark W. Slobodnik

发明人： Joseph W. Caldwell ,  Mark W. Slobodnik

IPC分类号： G01F23/296 ,  G01M3/32

CPC分类号： G01F23/2962 ,  G01M3/3245

摘要： A liquid level measuring system having a tubular ultrasonic probe with a length in excess of the depth of liquid to be measured; for vertical insertion into a tank. A transducer inside the tube, at a first distance above the bottom end of probe body, responds transmits a sinusoidal acoustical pulse through the probe to the surface of the liquid. An echo returns from the surface of the liquid to the transducer and provides a sinusoidal echo signal. A receiver responds to the echo signal by providing a start signal corresponding to the transmitter signal crossing a predetermined amplitude in a predetermined direction and by providing a stop signal corresponding to a first selected echo signal crossing a second predetermined reference level in a predetermined direction. The speed of sound in the liquid is measured by measuring the echo time to a calibration rod in the tube at a known distance from the transducer. A timer measures the time between the start and stop signals and provides the time to a sequential controller. The depth of the liquid and the leak rate of the tank are calculated for display.

摘要翻译： 一种液位测量系统，具有管状超声波探头，其长度超过要测量的液体的深度; 用于垂直插入水箱。 管内的换能器，在探针本体底端上方的第一距离处，响应将通过探头的正弦声脉冲传播到液体表面。 回波从液体表面返回到换能器，并提供正弦回波信号。 接收机通过提供与在预定方向上穿过预定幅度的发射机信号相对应的起始信号并且通过提供与在预定方向上与第二预定参考电平相交的第一选定回波信号相对应的停止信号来响应回波信号。 通过测量与传感器已知距离的管中校准杆的回波时间来测量液体中的声速。 定时器测量起始和停止信号之间的时间，并为顺序控制器提供时间。 计算液体的深度和罐的泄漏率用于显示。