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1. 发明授权

US06508135B1 Liquid flow meter 失效
标题翻译：液体流量计
公开(公告)号：US06508135B1
公开(公告)日：2003-01-21
申请号：US09673887
申请日：2001-03-01
申请人： Barry John Martin , Neil Colin Temperley , John Chester Wendoloski , Graeme Edwards , Paul Drew , Jason Ivan Vanajek , Peter Raymond Dencher
发明人： Barry John Martin , Neil Colin Temperley , John Chester Wendoloski , Graeme Edwards , Paul Drew , Jason Ivan Vanajek , Peter Raymond Dencher
IPC分类号： G01F166
CPC分类号： G01F1/667 , G01P5/245
摘要： A liquid flow meter for directly measuring the velocity of a liquid is disclosed. The liquid flow meter includes a pair transducers arranged facing each other in a conduit through which the liquid flows. The liquid flow meter also includes a transmitter means for causing the transducers to simultaneously transmit an acoustic wave packet directed for reception at the other transducer. A differential receiver means is also included whereby the differential receiver means has inputs each coupled to a corresponding one of the transducers for detecting an acoustic signal received thereby and determining a difference between the two received signals. The difference being related to the velocity of the liquid within the conduit. The transmitter means and the differential receiver means are each matched to the transducers to ensure substantial reciprocity to thereby substantially avoid phase and/or amplitude variations in the received signal. A method for measuring the velocity of a liquid is also disclosed. The method involves transmitting an acoustic wave packet between a pair of transducers that face each other, detecting an acoustic signal received by a pair of amplifiers and determining the time difference between the two received signals where the receiver amplifiers are matched to the transducers through resistive components.
摘要翻译：公开了用于直接测量液体速度的液体流量计。液体流量计包括在液体流过的导管中彼此相对布置的一对换能器。液体流量计还包括一个发射机装置，用于使换能器同时传输一个指向另一个换能器接收的声波分组。还包括差分接收器装置，由此差分接收器装置具有每个耦合到相应换能器之一的输入端，用于检测由此接收的声信号，并确定两个接收信号之间的差。该差异与导管内液体的速度有关。发射机装置和差分接收机装置各自与换能器匹配以确保实质的可逆性，从而基本上避免接收信号中的相位和/或幅度变化。还公开了一种用于测量液体速度的方法。该方法涉及在彼此面对的一对换能器之间传输声波包，检测由一对放大器接收的声信号，并且通过电阻分量确定两个接收信号之间的时间差，其中接收机放大器与换能器匹配。

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