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1. 发明授权

US06202484B1 Method and device for determining a liquid level with the aid of ultrasonic pulses 失效
标题翻译：借助超声波脉冲确定液位的方法和装置
公开(公告)号：US06202484B1
公开(公告)日：2001-03-20
申请号：US09111132
申请日：1998-07-03
申请人： Siegfried Willner , Michael Eisentraudt
发明人： Siegfried Willner , Michael Eisentraudt
IPC分类号： G01F2328
CPC分类号： G01F23/2962 , G01S7/52004 , G01S7/52006 , G01S15/10 , G01S15/88
摘要： A method for determining a liquid level with the aid of ultrasonic pulses improves the measuring accuracy of the liquid level in a container with an echo time measurement of ultrasonic pulses and a mean sound velocity. The mean sound velocity is extrapolated from at least two reference sound velocities in the liquid. In this way it is possible to achieve a measuring accuracy of less than a millimeter, independently of the liquid level. A device for carrying out the method has a main measuring path, at least one device for transmitting and receiving ultrasonic pulses, at least two reference paths for determining sound velocities, and a computer unit. The computer unit extrapolates from the sound velocities to the mean sound velocity.
摘要翻译：借助于超声脉冲确定液位的方法提高了超声脉冲的回波时间测量和平均声速的容器中液面的测量精度。平均声速从液体中的至少两个参考声速被外推。以这种方式，可以独立于液位实现小于毫米的测量精度。用于执行该方法的装置具有主测量路径，用于发送和接收超声波脉冲的至少一个装置，用于确定声速的至少两个参考路径和计算机单元。计算机单元从声速推断到平均声速。

2. 发明授权

US4958518A Sensor for determining liquid level in a container 失效
标题翻译：用于确定容器中液位的传感器
公开(公告)号：US4958518A
公开(公告)日：1990-09-25
申请号：US259518
申请日：1988-10-18
申请人： Josef Duenstl , Siegfried Willner , Ralph Schroeppel
发明人： Josef Duenstl , Siegfried Willner , Ralph Schroeppel
IPC分类号： G01F23/28 , G01F23/296
CPC分类号： G01F23/2961 , Y10S367/908
摘要： A rod shaped or tubular housing for a sensor includes an interior space provided with upper and lower compensating openings and within which an ultrasound measured distance device. Below the ultrasound measured distance device, the interior is connected to the lower compensating opening through a narrow channel proceeding in an axial direction of the housing. The housing is formed of two half shells of plastic joined to one another whose wall parts engage into one another to form the narrow channel. The ultrasound transducers and the electrical leads are embedded into the half shells. A second ultrasound measured distance device which is in direct communication with the surrounding space may be provided above the interior space. The ultrasound transducer of the measured distance device is excited to transmit in a pulsed fashion.
摘要翻译：用于传感器的棒状或管状壳体包括设置有上部和下部补偿开口的内部空间，并且在该内部空间内具有超声波测量的距离装置。在超声测量距离装置下方，内部通过沿着壳体的轴向方向进行的窄通道连接到下补偿开口。壳体由两个彼此连接的半壳形成，其壁部彼此接合以形成狭窄的通道。超声波换能器和电引线嵌入半壳。可以在内部空间上方设置与周围空间直接连通的第二超声测量距离装置。测量的距离装置的超声换能器被激发以脉冲方式传输。

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