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    • 78. 发明专利
    • Process sensor module with ungrounded single input/ output conductor
    • 具有单相输入/输出导体的工艺传感器模块
    • JP2003042881A
    • 2003-02-13
    • JP2002141414
    • 2002-05-16
    • Rosemount Incローズマウント インコーポレイテッド
    • FRICK ROGER L
    • G01L13/06G01D11/24G01L9/00G01L13/02G01L19/00H04B15/00
    • G01L9/0072G01D11/245G01L13/025
    • PROBLEM TO BE SOLVED: To eliminate high-level noise of a communication bus connected to an integrated circuit via a multi-core cable. SOLUTION: This process sensor module 100 includes a housing 104 with a first mounting part 106 to be rotation-freely joined to a corresponding mounting part on a bus adaptor module. The integrated circuit 110 in the housing includes a process sensor. A two-conductor circuit 116 excites the integrated circuit, transmits a sensed process variable to a bus adaptor module 102, and transmits data from the bus adaptor module 102 to the integrated circuit 110. A rotatable and coaxial electric contact part 120 is sealed in the first mounting part, and the two-conductor circuit is joined to the bus adaptor module 102.
    • 要解决的问题:通过多芯电缆消除连接到集成电路的通信总线的高电平噪声。 解决方案:该过程传感器模块100包括壳体104,壳体104具有第一安装部分106,以便与公共汽车适配器模块上的对应的安装部分旋转自由地连接。 壳体中的集成电路110包括处理传感器。 双芯电路116激励集成电路,将感测到的过程变量发送到总线适配器模块102,并将数据从总线适配器模块102发送到集成电路110.可旋转和同轴的电接触部分120被密封在 第一安装部分,并且双导体电路连接到总线适配器模块102。
    • 80. 发明专利
    • Piezoelectric oscillator pressure sensor
    • 压电振荡器压力传感器
    • JPS6190029A
    • 1986-05-08
    • JP21303984
    • 1984-10-11
    • Nippon Dempa Kogyo Co Ltd
    • OOTA HARUYOSHI
    • G01L9/00
    • G01L9/0072G01L9/0022
    • PURPOSE:To detect a pressure difference with high precision by a piezoelectric oscillator which has a stable frequency by providing the piezoelectric oscillator in an airtight container and putting it opposite an electrode which receives pressure oscillation from a diaphragm. CONSTITUTION:The diaphragm 2 is provided on the top surface of the airtight container 1. The counter electrode 2a is provided on the reverse surface of the diaphragm 2 and the piezoelectric oscillator 3 is fitted by a holder 4 while a gap (t) is left. Further, electrodes 3a are provided on both surfaces of the piezoelectric oscillator 3. The diaphragm 2 is displaced when applied with pressure. Then, the gap (t) between the counter electrode 2a and piezoelectric oscillator 3 varies and the electrostatic capacity varies, so that the pressure difference is detected by an oscillation circuit. Further, the gap (t) is made adjustable. Therefore, the pressure is detected electrically from the variation (n) the gap between the diaphragm and piezoelectric oscillator, so the precision of the detection is improved; and the pressure is detected over a wide range by adjusting the gap.
    • 目的:通过在气密容器中设置压电振荡器并将其与从振膜接受压力振荡的电极相对置,通过压电振荡器以高精度检测压差,该压电振荡器具有稳定的频率。 构成:膜片2设置在气密容器1的顶面上。对置电极2a设置在隔膜2的背面,压电振子3由保持件4配合,同时留有间隙(t) 。 此外,电极3a设置在压电振荡器3的两个表面上。当施加压力时,隔膜2被移位。 然后,对置电极2a和压电振荡器3之间的间隙(t)变化,静电电容变化,从而通过振荡电路来检测压力差。 此外,间隙(t)可调。 因此,从隔膜和压电振子之间的间隙的变化(n)电压检测压力,从而提高检测精度; 并且通过调整间隙在宽范围内检测压力。