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    • 1. 发明授权
    • Capacitive electromagnetic flowmeter
    • 电容式电磁流量计
    • US07950292B2
    • 2011-05-31
    • US12447690
    • 2007-08-03
    • Yutaka HaradaIchiro MitsutakeKouji OkudaTaka InoueTetsuya Kajita
    • Yutaka HaradaIchiro MitsutakeKouji OkudaTaka InoueTetsuya Kajita
    • G01F1/58G01R27/26
    • G01F1/60G01F1/588
    • In a constant current circuit, a constant current is caused to flow through a resistor, thereby causing a constant voltage to occur across the resistor. This constant voltage is then superimposed on an output signal of an operational amplifier that is to be fed back to the drain of a field effect transistor, thereby maintaining the same potential in an AC manner between the output terminal of the operational amplifier and the drain of the field effect transistor. In this way, the gate and drain of the field effect transistor is caused to exhibit the same potential in an AC manner, so that no current will occur through the stray capacitance between the gate and drain of the field effect transistor. As a result, similarly to a case of using a feedback capacitor, the input impedance of the field effect transistor can be raised.
    • 在恒流电路中,使恒定电流流过电阻器,从而在电阻器两端产生恒定的电压。 然后将该恒定电压叠加在要反馈到场效应晶体管的漏极的运算放大器的输出信号上,从而在运算放大器的输出端和漏极之间以AC方式保持相同的电位 场效应晶体管。 以这种方式,使场效应晶体管的栅极和漏极以交流方式呈现相同的电位,使得不会通过场效应晶体管的栅极和漏极之间的杂散电容发生电流。 结果,与使用反馈电容器的情况类似,可以提高场效应晶体管的输入阻抗。
    • 4. 发明授权
    • Positioner
    • 定位器
    • US09092018B2
    • 2015-07-28
    • US13418627
    • 2012-03-13
    • Kouichirou MurataKouji OkudaHiroaki Nagoya
    • Kouichirou MurataKouji OkudaHiroaki Nagoya
    • G05D11/00G05B15/02
    • G05B15/02
    • The range of electric currents that can be assumed by a supply electric current is categorized into a plurality of electric current ranges, where, for each electric current range category, there are combinations of functions, wherein the total value for the electric current required is less than the upper limit value, and no less than the lower limit value, for the electric current range established, and a table wherein these combinations are established is stored in memory. An actual value is detected for a supply current I to ascertain the category of electric current to which the supply electric current I applies, the combination of functions established for the applicable category of electric currents is read out from the table, and operation of the function circuit portions for the functions of the combination that has been read out is enabled, and operation of the other function circuit portions is disabled.
    • 由供电电流可以假设的电流范围分为多个电流范围,其中对于每个电流范围类别,存在功能组合,其中所需电流的总值较小 对于建立的电流范围的上限值和不低于下限值,并且将其中建立这些组合的表存储在存储器中。 检测到电源电流I的实际值,以确定施加电源电流I的电流的类别,从表中读出适用于电流类别的功能组合,并且功能的操作 已经读出的组合的功能的电路部分被启用,并且其他功能电路部分的操作被禁用。
    • 5. 发明授权
    • Field device
    • 现场设备
    • US08878685B2
    • 2014-11-04
    • US13419582
    • 2012-03-14
    • Kouji OkudaHiroaki NagoyaKouichirou Murata
    • Kouji OkudaHiroaki NagoyaKouichirou Murata
    • G08B21/00H03K5/12F16K37/00F16K31/12F15B21/08
    • F16K37/0041F15B21/08F16K31/12
    • To provide reliable notification of a fault state when a power supply to a calculation processing portion is in the OFF state when a power supply to a communication processing portion is in the ON state. An isolating circuit, an inverting circuit inverting a signal branch-outputted through an output line of the isolating circuit, and a selecting circuit that uses the signal outputted from the output line of the isolating circuit as a first input and the inverted signal from the inverting circuit as a second input, to select either the first input or the second input, depending on a selection setting status thereof, to output the selected signal to the communication processing portion are provided. A +5 V voltage is applied through a resistor to the output line of the isolating circuit. This +5 V voltage is produced through the power supply supplied from the second double-wire transmission path.
    • 当向通信处理部分的电源处于ON状态时,当计算处理部分的电源处于OFF状态时,提供可靠的故障状态通知。 隔离电路,将通过隔离电路的输出线输出的信号反相的反相电路和使用从隔离电路的输出线输出的信号作为第一输入的选择电路和来自反相器的反相信号 提供作为第二输入的电路,根据其选择设置状态选择第一输入或第二输入,以将选择的信号输出到通信处理部分。 通过电阻器将+ 5V电压施加到隔离电路的输出线。 通过从第二双线传输路径提供的电源产生该+ 5V电压。
    • 6. 发明申请
    • FIELD DEVICE
    • 现场设备
    • US20120249231A1
    • 2012-10-04
    • US13419582
    • 2012-03-14
    • Kouji OkudaHiroaki NagoyaKouichirou Murata
    • Kouji OkudaHiroaki NagoyaKouichirou Murata
    • H03L9/00
    • F16K37/0041F15B21/08F16K31/12
    • To provide reliable notification of a fault state when a power supply to a calculation processing portion is in the OFF state when a power supply to a communication processing portion is in the ON state. An isolating circuit, an inverting circuit inverting a signal branch-outputted through an output tine of the isolating circuit, and a selecting circuit that uses the signal outputted from the output line of the isolating circuit as a first input and the inverted signal from the inverting circuit as a second input, to select either the first input or the second input, depending on a selection setting status thereof, to output the selected signal to the communication processing portion are provided. A +5 V voltage is applied through a resistor to the output line of the isolating circuit. This +5 V voltage is produced through the power supply supplied from the second double-wire transmission path.
    • 当向通信处理部分的电源处于ON状态时,当计算处理部分的电源处于OFF状态时,提供可靠的故障状态通知。 隔离电路,将由隔离电路的输出叉输出的信号反相的反相电路,以及使用从隔离电路的输出线输出的信号作为第一输入的选择电路和来自反相器的反相信号 提供作为第二输入的电路,根据其选择设置状态选择第一输入或第二输入,以将选择的信号输出到通信处理部分。 通过电阻器将+ 5V电压施加到隔离电路的输出线。 通过从第二双线传输路径提供的电源产生该+ 5V电压。
    • 7. 发明申请
    • CAPACITIVE ELECTROMAGNETIC FLOWMETER
    • 电容式电磁流量计
    • US20100071476A1
    • 2010-03-25
    • US12447690
    • 2007-08-03
    • Yutaka HaradaIchiro MitsutakeKouji OkudaTaka InoueTetsuya Kajita
    • Yutaka HaradaIchiro MitsutakeKouji OkudaTaka InoueTetsuya Kajita
    • G01F1/58
    • G01F1/60G01F1/588
    • In a constant current circuit, a constant current is caused to flow through a resistor, thereby causing a constant voltage to occur across the resistor. This constant voltage is then superimposed on an output signal of an operational amplifier that is to be fed back to the drain of a field effect transistor, thereby maintaining the same potential in an AC manner between the output terminal of the operational amplifier and the drain of the field effect transistor. In this way, the gate and drain of the field effect transistor is caused to exhibit the same potential in an AC manner, so that no current will occur through the stray capacitance between the gate and drain of the field effect transistor. As a result, similarly to a case of using a feedback capacitor, the input impedance of the field effect transistor can be raised.
    • 在恒流电路中,使恒定电流流过电阻器,从而在电阻器两端产生恒定的电压。 然后将该恒定电压叠加在要反馈到场效应晶体管的漏极的运算放大器的输出信号上,从而在运算放大器的输出端和漏极之间以AC方式保持相同的电位 场效应晶体管。 以这种方式,使场效应晶体管的栅极和漏极以交流方式呈现相同的电位,使得不会通过场效应晶体管的栅极和漏极之间的杂散电容发生电流。 结果,与使用反馈电容器的情况类似,可以提高场效应晶体管的输入阻抗。