公开(公告)号：US4253341A

公开(公告)日：1981-03-03

申请号：US33027

申请日：1979-04-24

申请人： Mamoru Ikeda ,  Noboru Yamazaki ,  Jun Fukui ,  Kazuhiko Shirai ,  Takesh Yano

发明人： Mamoru Ikeda ,  Noboru Yamazaki ,  Jun Fukui ,  Kazuhiko Shirai ,  Takesh Yano

IPC分类号： G01F1/06 ,  G01F1/075 ,  G01F15/07 ,  G01F15/075 ,  G01P3/487 ,  G01P13/04

CPC分类号： G01F15/0755 ,  G01F1/075

摘要： A water meter eliminates the usual conversion gear trains by using a permanent magnet which rotates in proportion to the volume of water to be measured. A magnetic field sensor, comprising a ferromagnetic magnetoresistor, produces a sensor signal which varies as a function of the rotation of the magnet. A wave shaper forms the sensor signal into a sequence of pulses which drive a totalizer for producing a signal indicative of the volume of the water used. The output of the totalizer is supplied to an indicator device which displays the total amount of water passing through the meter, in terms of a predetermined unit of measure. Preferably, the sensor comprises at least two magnetoresistors for producing two sensor signals with a phase difference therebetween. The wave shaper then produces two pulse sequences for identifying a normal and an inverse flow of water, respectively. These two sequences cause the totalizer to count up or down, respectively.

摘要翻译： 水表通过使用与要测量的水的体积成比例地旋转的永久磁铁来消除通常的转换齿轮系。 包括铁磁性磁阻电阻器的磁场传感器产生作为磁体旋转的函数而变化的传感器信号。 波形整形器将传感器信号形成为脉冲序列，其驱动累加器以产生指示所使用的水的体积的信号。 累积器的输出被提供给指示装置，其以预定的测量单位显示通过流量计的水的总量。 优选地，传感器包括至少两个用于产生其间具有相位差的传感器信号的磁阻。 然后，波形整形器分别产生用于识别水的正常和逆流的两个脉冲序列。 这两个序列使得累加器分别向上或向下计数。