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    • 2. 发明授权
    • Field sensor communication method and system
    • 现场传感器通信方法与系统
    • US5184121A
    • 1993-02-02
    • US487124
    • 1990-03-02
    • Makoto KogureAkira SaseMasao Fukunaga
    • Makoto KogureAkira SaseMasao Fukunaga
    • G08C25/02G08C19/02
    • G08C19/02
    • In a communication system in which a plurality of communication units are connected to a common two-wire transmission line and signal transmission/reception is made between the communication unit and a field sensor connected to one end of the transmission line, the communication unit transmits a signal to the field sensor under the condition that no signal is present on the transmission line during a period of time not shorter than a predetermined time while the field sensor transmits a signal indicative of in-use of the transmission line at an interval of time shorter than the predetermined time during a period of time until the field sensor sends back a signal in response to the signal from the communication unit, whereby signal collision between the plurality of communication units is prevented with no provision of any specific means.
    • 在其中多个通信单元连接到公共双线传输线并且在通信单元和连接到传输线的一端的场传感器之间进行信号发送/接收的通信系统中,通信单元发送 在场传感器以更短的时间间隔发送指示传输线的使用信号的信号的情况下,在不短于预定时间的时间段内,在传输线路上不存在信号的情况下,向场传感器发信号 比直到现场传感器响应于来自通信单元的信号发回信号的时间段内的预定时间为止,从而防止了多个通信单元之间的信号冲突,而没有提供任何特定的方式。
    • 3. 发明授权
    • Electromagnetic flow meter
    • 电磁流量计
    • US5469746A
    • 1995-11-28
    • US215339
    • 1994-03-21
    • Masao FukunagaYutaka SakuraiKouji SaitoTamio Ishihara
    • Masao FukunagaYutaka SakuraiKouji SaitoTamio Ishihara
    • G01F1/60G01F15/06G08C19/02G01F1/00
    • G01F15/063G01F1/60G08C19/02
    • An electromagnetic flow meter for industries includes a transducer and a signal processor provided separately from the transducer. The transducer having an exciting circuit, an amplifying and calculating part and a transmitting part outputs an analog flow rate signal and digital signals which are superimposed to the an analog flow rate signal to the signal processor. The analog signal sent to the signal processor is passed through the signal processor without receiving any signal processing and the digital signals are sent into the transducer or taken into the signal processor through alternating current coupling means. The data transmission is diagnosed by checking the conformity between the data stored in the signal sending part and the received data. Data set in a data setting part provided in the signal processor are sent to the transducer through a transmitting cable in which the flow rate data are also transmitted.
    • 用于工业的电磁流量计包括与换能器分开设置的换能器和信号处理器。 具有激励电路的传感器,放大和计算部分以及发送部分将模拟流量信号和与模拟流量信号叠加的数字信号输出到信号处理器。 发送到信号处理器的模拟信号通过信号处理器而不接收任何信号处理,并且数字信号被发送到换能器中或通过交流耦合装置进入信号处理器。 通过检查存储在信号发送部分中的数据与接收到的数据之间的一致性来诊断数据传输。 在信号处理器中提供的数据设定部分中设置的数据通过发送电缆发送到传感器,传输电缆也传送流量数据。
    • 4. 发明授权
    • Electromagnetic flow meter
    • 电磁流量计
    • US5458003A
    • 1995-10-17
    • US983060
    • 1992-11-30
    • Tamio IshiharaYutaka SakuraiMasao FukunagaShigeo NishinoSouzo Fujimoto
    • Tamio IshiharaYutaka SakuraiMasao FukunagaShigeo NishinoSouzo Fujimoto
    • G01F1/58G01P5/08
    • G01F1/58G01P5/086
    • An electromagnetic flow meter comprises a ceramic measuring pipe formed into a straight cylinder through which fluid to be measured flows, electromagnetic field generating device disposed adjacent to a central portion of an outer surface of the central portion of the ceramic measuring pipe for generating an electromagnetic field into a radial direction of the ceramic measuring pipe, electrodes for detecting an electric potential generated in the fluid, a case which accommodates the ceramic measuring pipe, the electromagnetic field generating device and the electrodes, and sealing members which are disposed between inner surfaces of the flanges of the case and ends of outer circumference of the ceramic measuring pipe. The case has a length longer than that of the ceramic measuring pipe and flanges at both ends thereof. Inner diameters of the flanges are slightly larger than an outer diameter of the ceramic measuring pipe. Portions of the sealing members outwardly project over the end surfaces of the flanges of the case.
    • 一种电磁流量计,其特征在于,包括:陶瓷测量管,其形成为待测量流体的直圆筒;电磁场产生装置,邻近陶瓷测量管的中心部分的外表面的中心部分设置,用于产生电磁场 陶瓷测量管的径向方向,用于检测流体中产生的电位的电极,容纳陶瓷测量管,电磁场产生装置和电极的壳体,以及设置在陶瓷测量管的内表面之间的密封构件 陶瓷测量管外壳法兰和外周端。 壳体的长度比陶瓷测量管的长度长,两端的凸缘长。 凸缘的内径略大于陶瓷测量管的外径。 密封构件的一部分向外突出在壳体的凸缘的端表面上。
    • 10. 发明授权
    • Electromagnetic flow meter
    • 电磁流量计
    • US5207105A
    • 1993-05-04
    • US538092
    • 1990-06-14
    • Masao FukunagaIkuo UematsuMasahiro IkegawaMasayuki Kaiho
    • Masao FukunagaIkuo UematsuMasahiro IkegawaMasayuki Kaiho
    • G01F1/58G01F1/60G01F25/00
    • G01F25/0007G01F1/58G01F1/588G01F1/60
    • An apparatus in which a magnetic field is generated by an excitation coil provided in the outside of a conduit and electromotive force generated in electrodes attached on the conduit is detected to thereby measure a flow rate of a fluid flowing in the conduit, in which the conduit is made thinner in a manner so that a ratio of the axial length of the conduit to the inside diameter of the conduit is set to a value within a range of from 0.2 to 1.0, and in which correction data previously analyzed in accordance with magnetic permeability and inside surface conductivity of a mate piping to which the conduit is to be connected are stored so that a detection signal from the electrodes is corrected on the basis of the correction data to thereby measure the flow rate of the fluid flowing in the conduit.
    • 检测由设置在导管外部的励磁线圈产生磁场的装置,并且检测在连接在导管上的电极中产生的电动势,从而测量在导管中流动的流体的流量,其中导管 以使导管的轴向长度与导管的内径的比率设定为0.2〜1.0的范围内的值的方式变薄,并且其中根据磁导率先前分析的校正数据 存储要将导管连接到的配合管道的内表面电导率,以便根据校正数据校正来自电极的检测信号,从而测量在管道中流动的流体的流量。