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1. 发明授权

US5131279A Sensing element for an ultrasonic volumetric flowmeter 失效
标题翻译：超声波流量计的传感元件
公开(公告)号：US5131279A
公开(公告)日：1992-07-21
申请号：US648924
申请日：1991-02-01
申请人： Michael Lang , Michael Steinacher , Urs Wust
发明人： Michael Lang , Michael Steinacher , Urs Wust
IPC分类号： G01F1/66
CPC分类号： G01F1/667 , G01F1/662
摘要： This sensing element, which is to be installed in a pipeline conducting the fluid to be measured, consists of a straight section of pipe (1) with an unrestricted cross-sectional area and an uninterrupted wall to the external surface of which are positively fixed, successively in the downstream direction and in a spaced-apart relationship: a first resonance absorber (11) at the inlet end consisting of at least one absorber disk (111), a first transducer disk (21) having a first ultrasonic transducer (31) attached to one lateral surface thereof which excites the radial resonance frequency of said first transducer disk (21), a second transducer disk (22) having a second ultrasonic transducer (32) attached to one lateral surface thereof which excites the radial resonance frequency of said second transducer disk (22), and a second resonance absorber (12) at the outlet end consisting of at least one absorber disk (121), the absorber disks (111, 121) being dimensioned so that their respective radial resonance frequencies are equal to the excitation frequencies of the associated ultrasonic transducers.
摘要翻译：要安装在导管待测流体的管道中的该传感元件由具有无限制横截面积的管道（1）的直的部分和其外表面被固定的不间断的壁组成，连续地沿下游方向和间隔开的关系：入口端的第一共振吸收器（11）由至少一个吸收盘（111）组成，第一换能器盘（21）具有第一超声换能器（31）附接到其激发所述第一换能器盘（21）的径向共振频率的一个侧表面，具有附接到其一个侧表面的第二超声换能器（32）的第二换能器盘（22），所述第二超声换能器激发所述第二换能器盘（22）和在由至少一个吸收盘（121）组成的出口端处的第二共振吸收器（12），所述吸收器盘（111,121）的尺寸被设计成使得它们各自径向共振频率等于相关超声换能器的激发频率。

2. 发明授权

US5052230A Method and arrangement for flow rate measurement by means of ultrasonic waves 失效
标题翻译：超声波流量测量的方法和布置
公开(公告)号：US5052230A
公开(公告)日：1991-10-01
申请号：US460947
申请日：1990-02-28
申请人： Michael Lang , Michael Steinacher
发明人： Michael Lang , Michael Steinacher
IPC分类号： G01F1/66
CPC分类号： G01F1/667
摘要： For flow rate measurement by means of ultrasonic waves, on a measuring tube two ultrasonic transducers are arranged spaced apart from each other, one operating as transmitting transducer and the other as receiving transducer. For determining the flow rate the phase shift between the transmission signal and the reception signal is measured digitally in that the measuring time intervals corresponding to the phase shift the periods of a signal are counted with a counting frequency which is substantially greater than the frequency of the transmission signal. The start phase which the counting frequency signal has at the beginning of each counting operation with respect to the measuring time interval is varied from measuring time interval to measuring time interval in a measuring cycle including a plurality of successive measuring time intervals and the counts obtained in the course of the measuring cycle are evaluated to form a measured value with increased measurement resolution.
摘要翻译： PCT No.PCT / EP89 / 00775 Sec。 371日期1990年2月28日 102（e）1990年2月28日PCT PCT 1989年7月6日PCT公布。公开号WO90 / 00723 日期1990年1月25日。对于通过超声波进行的流量测量，在测量管上，两个超声波换能器彼此间隔布置，一个作为发射换能器工作，另一个作为接收换能器。为了确定流量，传输信号和接收信号之间的相移是以数字方式测量的，因为对应于相移的测量时间间隔，信号周期用计数频率计数，其计数频率基本上大于传输信号。计数频率信号在每次计数操作开始时相对于测量时间间隔的起始相位在包括多个连续测量时间间隔的测量周期内的测量时间间隔与测量时间间隔之间变化，并且在评估测量循环的过程以形成具有增加的测量分辨率的测量值。

3. 发明授权

US5105666A Ultrasonic flowmeter 失效
标题翻译：超声波流量计
公开(公告)号：US5105666A
公开(公告)日：1992-04-21
申请号：US516146
申请日：1990-04-30
申请人： Michael Steinacher
发明人： Michael Steinacher
IPC分类号： G01F1/66
CPC分类号： G01F1/663 , G01F1/667
摘要： An ultrasonic flowmeter includes first and second ultrasonic transducers which are mounted along a fluid measuring section opposite each other and whose connecting line makes an angle different from 90.degree. with the axis of the fluid measuring section. The transducers can be switched to transmit mode or receive mode by a switching arrangement having first and second switching paths per transducer, one conducting and the other simultaneously nonconducting, or vice versa. One end of the first and second switching paths is coupled to the associated first or second transducer. The first switching paths associated with the first and second transducers having their other ends coupled to the input of a measuring circuit, and the second switching paths associated with said first and second transducers having their other ends coupled to an oscillator. To reduce crosstalk, the switching arrangement includes two constantly nonconducting, parallel-connected switching paths coupled in series with an inverting amplifier between the oscillator output and the input of the measuring circuit or between the inputs of the two transducers.
摘要翻译：超声波流量计包括第一和第二超声波换能器，其沿着彼此相对的流体测量部分安装，并且其连接线与流体测量部分的轴线成90度的角度。换能器可以通过具有每个换能器的第一和第二切换路径的切换装置切换到发射模式或接收模式，一个导通和另一个同时不导通，或反之亦然。第一和第二切换路径的一端耦合到相关联的第一或第二换能器。与第一和第二换能器相关联的第一切换路径的另一端耦合到测量电路的输入端，并且与所述第一和第二换能器相关联的第二开关路径的另一端耦合到振荡器。为了减少串扰，开关装置包括与振荡器输出和测量电路的输入之间或两个换能器的输入端之间的反相放大器串联耦合的两个不间断的并行连接的开关路径。

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