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    • 4. 发明专利
    • Ultrasonic flow velocity distribution and flowmeter
    • 超声波流速分布和流量计
    • JP2003344131A
    • 2003-12-03
    • JP2002150398
    • 2002-05-24
    • Keio GijukuTokyo Electric Power Co Inc:The学校法人慶應義塾東京電力株式会社
    • HISHIDA KOICHITAKEDA YASUSHIMORI HARUTSUGU
    • G01P5/00G01F1/66G01F1/712G01P5/24G01S15/58
    • G01P5/241G01F1/66G01F1/663G01F1/667G01F1/712G01S15/58
    • PROBLEM TO BE SOLVED: To accurately measure a flow velocity distribution as well as the flow rate of a relatively clean fluid having the difficulty in measuring the flow rate thereof, in addition to a conventional fluid to be measured. SOLUTION: The ultrasonic flow velocity distribution and the flowmeter 10 includes a trigger oscillation means 12, a pulser receiver 14, a transducer 17 which emits an ultrasonic pulse toward a measurement line ML in a fluid pipe 20 by an electric signal from the pulser receiver 14, and a signal processing means 23 which processes and analyses an ultrasonic echo signal that is the reflected wave from the transducer 17 and which obtains the position and the velocity of an ultrasonic wave reflecting body along the measurement line ML. The signal processing means 23 includes an AD converter 15 which converts the ultrasonic echo signal into a digital signal. The trigger oscillation means 12 controls the timing for transmitting/receiving the signal between the pulser receiver 14 and the AD converter 15, and adjusts the setting so that the oscillation of the ultrasonic pulse and the receiving of the ultrasonic echo signal continue plural times and that a subsequent specific waiting time is provided. COPYRIGHT: (C)2004,JPO
    • 要解决的问题除了常规的待测流体之外,还要精确地测量流速分布以及难以测量其流量的相对清洁的流体的流量。 解决方案:超声流速分布和流量计10包括触发振荡装置12,脉冲发生器接收器14,换能器17,其通过来自流体管道20的电信号在流体管20中向测量线ML发射超声波脉冲 脉冲发生器接收器14和信号处理装置23,其处理和分析来自换能器17的作为反射波的超声波回波信号,并且获得超声波反射体沿着测量线ML的位置和速度。 信号处理装置23包括将超声回波信号转换为数字信号的AD转换器15。 触发振荡装置12控制在脉冲发生器接收器14和AD转换器15之间发送/接收信号的定时,并调节该设定,使得超声波脉冲的振荡和超声回波信号的接收继续多次,并且 提供随后的具体等待时间。 版权所有(C)2004,JPO
    • 10. 发明专利
    • Correlation flowmeter
    • 相关流量计
    • JPS5940119A
    • 1984-03-05
    • JP14990482
    • 1982-08-31
    • Oval Eng Co Ltd
    • FUKAMI TERUKI
    • G01F1/712
    • G01F1/712
    • PURPOSE:To obtain a correlation coefficient which has superior responsibility and high reliability, by recording the 2nd signal by using an (n)-bit memory and finding the number of the 1st corresponding bit coincidences between said recorded value and the recorded value of the 1st signal another memory. CONSTITUTION:The capacities of the 1st and the 2nd sampling register 19 and 20 are denoted as N and (n). One clock pulse is generated by an oscillator 14 to apply new data to the sampling register 19, and when the last data is shifted, bit by bit, the new data is moved to an N-bit auxiliary register 21 immediately. Then, the data is shifted by shift pulses of frequency which is at least N times as high as that of clock pulses and the degree of coincidence is found simultaneously. Namely, exclusive OR circuits 22-29 input the outputs of comparisons between the least significant digit (n) bits of the auxiliary register 21 and (n) corresponding digit data of the sampling register 20 to a coincidence degree calculating circuit 30, which outputs their mean value. Thus, the resolution of the correlation coefficient of a correlator is improved to one (n)th as large as before without spoiling time-axis resolution.
    • 目的:通过使用(n)位存储器记录第二信号,并找到所述记录值与第一信号的记录值之间的第一对应位重合数,获得具有优异责任和高可靠性的相关系数 发出另一个记忆。 构成:第1和第2采样寄存器19和20的容量表示为N和(n)。 一个时钟脉冲由振荡器14产生,以将新数据施加到采样寄存器19,并且当最后一个数据逐位移位时,新数据立即移动到N位辅助寄存器21。 然后,通过至少是时钟脉冲的N倍的频率的移位脉冲移位数据,同时发现一致度。 也就是说,异或电路22-29将辅助寄存器21的最低有效位(n)位和(n)个采样寄存器20的对应数字数据之间的比较输出输入到重合度计算电路30,其输出它们 平均值。 因此,将相关器的相关系数的分辨率提高到一样大,而不损害时间轴分辨率。