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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
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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公开(公告)号：US20100060901A1
公开(公告)日：2010-03-11
申请号：US12300533
申请日：2007-05-10
摘要： An acoustic field in a body of water is monitored using a coherent light field emitter applying a distributed light field across the surface of the water to be reflected, and a sensor is used to sense reflected components of the light field above the surface and to provide a signal representing information in the reflected light and related to movements in the water and caused by the acoustic field. The signal is provided from an interferometry technique and useable to derive information on the underwater acoustic field in a useful form.
摘要翻译： 使用相干光场发射器监测水体中的声场，所述相干光场发射器在要反射的水的表面上施加分布的光场，并且使用传感器来感测表面上方的光场的反射分量，并提供 表示反射光中的信息并且与水中的运动相关并且由声场引起的信号。 信号由干涉测量技术提供，可用于以有用的形式导出水下声场的信息。
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公开(公告)号：US08179535B2
公开(公告)日：2012-05-15
申请号：US12300533
申请日：2007-05-10
摘要： An acoustic field in a body of water is monitored using a coherent light field emitter applying a distributed light field across the surface of the water to be reflected, and a sensor is used to sense reflected components of the light field above the surface and to provide a signal representing information in the reflected light and related to movements in the water and caused by the acoustic field. The signal is provided from an interferometry technique and useable to derive information on the underwater acoustic field in a useful form.
摘要翻译： 使用相干光场发射器监测水体中的声场，所述相干光场发射器在待反射的水的表面上施加分布的光场，并且使用传感器来感测表面上方的光场的反射分量并提供 表示反射光中的信息并且与水中的运动相关并且由声场引起的信号。 信号由干涉测量技术提供，可用于以有用的形式导出水下声场的信息。
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公开(公告)号：US06606916B2
公开(公告)日：2003-08-19
申请号：US09747579
申请日：2000-12-22
申请人： Noel Bignell , Colin Walter Braathen , Gerard Jan Jeep Berend DeGroot , Barry John Martin , Charles Malcolm Welsh , John Graeme Winter
发明人： Noel Bignell , Colin Walter Braathen , Gerard Jan Jeep Berend DeGroot , Barry John Martin , Charles Malcolm Welsh , John Graeme Winter
IPC分类号： G01F166
摘要： An ultrasonic fluid flow meter (50) measures the flow speed of a fluid by measuring the time, in each direction, for a sequence of ultrasonic pulses (55) to pass between two transducers (54A,54B) positioned in a measuring tube (52) in the fluid flow path. The second and subsequent transmit pulses of each sequence are caused to start by the arrival of its predecessor at the detector end of the measuring tube. A first transmit pulse calculates a delay (110) to a zero crossing which is used to identify a particular zero crossing at which the arrival of each pulse in the sequence is determined.
摘要翻译： 超声流体流量计（50）通过测量在位于测量管（52）中的两个换能器（54A，54B）之间通过的超声波脉冲（55）的序列的每个方向上的时间来测量流体的流速 ）在流体流动路径中。 通过其前身到达测量管的检测器端，使每个序列的第二个和随后的发射脉冲开始。 第一发射脉冲计算到过零点的延迟（110），其用于识别确定序列中每个脉冲到达的特定过零点。
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