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    Differential pressure transmitter having symmetrical construction
    1.
    发明授权
    Differential pressure transmitter having symmetrical construction 失效
    差压变送器具有对称结构

    公开(公告)号：US5621175A

    公开(公告)日：1997-04-15

    申请号：US601494

    申请日：1996-02-14

    申请人： Akira Nagasu ,  Yoshimi Yamamoto ,  Tomoyuki Tobita

    发明人： Akira Nagasu ,  Yoshimi Yamamoto ,  Tomoyuki Tobita

    IPC分类号： G01L9/00 ,  G01L13/02 ,  G01L7/08 ,  G01F1/38

    CPC分类号： G01L19/142 ,  G01L13/025 ,  G01L19/0038 ,  G01L19/0645

    摘要： A differential pressure transmitter for detecting a difference between a pressure of a first detection fluid in a first pressure-receiving chamber and a pressure of a second detection fluid in a second pressure-receiving chamber, including a first diaphragm for sealing the first detection fluid, a second diaphragm for sealing the second detection fluid which is installed almost in parallel to the first diaphragm, a first isolation chamber communicated to the first pressure-receiving chamber, a second isolation chamber communicated to the second pressure-receiving chamber, a third diaphragm installed between the first and the second chambers and in a direction different from those of the first and second diaphragms, and a differential pressure detection sensor installed on and connected to at least one of the first and the second isolation chambers. The differential pressure transmitter having a symmetrical construction has a high sensitivity because difference between transmitting coefficients in pressure transmitting paths in high and low pressures is minimized.

    摘要翻译： 一种差压变送器，用于检测第一受压室中的第一检测流体的压力与第二受压室中的第二检测流体的压力之差，包括用于密封第一检测流体的第一隔膜， 用于密封大致平行于第一隔膜安装的第二检测流体的第二隔膜，与第一受压室连通的第一隔离室，与第二受压室连通的第二隔离室，安装有第三隔膜的第三隔膜 在第一和第二室之间并且沿与第一和第二隔膜的方向不同的方向，以及安装在第一和第二隔离室中的至少一个隔离室上并连接到其上的差压检测传感器。 具有对称结构的差压变送器具有高灵敏度，因为在高压和低压下的压力传递路径中的传输系数之间的差异最小化。

    Process detection apparatus
    2.
    发明授权
    Process detection apparatus 失效
    过程检测装置

    公开(公告)号：US5554809A

    公开(公告)日：1996-09-10

    申请号：US318315

    申请日：1994-10-05

    申请人： Tomoyuki Tobita ,  Yoshimi Yamamoto ,  Masao Fukunaga ,  Teruo Kobayahsi ,  Akira Nagasu

    发明人： Tomoyuki Tobita ,  Yoshimi Yamamoto ,  Masao Fukunaga ,  Teruo Kobayahsi ,  Akira Nagasu

    IPC分类号： G01L13/00 ,  G01L9/00 ,  G01L13/06 ,  G01L19/00 ,  G01L19/02 ,  G01L19/08 ,  G01L7/00

    CPC分类号： G01L19/146 ,  G01L19/0007 ,  G01L19/0038 ,  G01L19/02 ,  G01L19/0645 ,  G01L19/142 ,  G01L19/148

    摘要： A compact pressure differential/pressure detector is a process detection apparatus for measuring a pressure, a level, a pressure differential of a process fluid. The detector is constructed of a pressure sensing block having sensors for sensing a pressure and a pressure differential, a signal processing block for processing signals from the pressure sensing block, and a terminal board block for receiving power supply from outside and transmitting signals to outside. These blocks are arranged along the same axis. Furthermore, an indicator indicating a process state is also arranged along the same axis and received in a covering case. The case is firmly attached to the pressure sensing block. The process detection apparatus permits a compact design and offers an excellent maintainability.

    摘要翻译： 紧凑型压力差压/压力检测器是用于测量过程流体的压力，水平和压力差的过程检测装置。 检测器由具有用于感测压力和压力差的传感器的压力感测块，用于处理来自压力感测块的信号的信号处理块，以及用于从外部接收电力并将信号传输到外部的端子板块构成。 这些块沿同一轴线排列。 此外，指示处理状态的指示器也沿着相同的轴布置并被接收在覆盖壳体中。 壳体牢固地连接到压力传感块。 过程检测装置允许紧凑的设计并提供优异的可维护性。

    Compact differential pressure transmitter having first and second damper chambers
    7.
    发明授权
    Compact differential pressure transmitter having first and second damper chambers 失效
    紧凑型差压变送器具有第一和第二阻尼室

    公开(公告)号：US5531120A

    公开(公告)日：1996-07-02

    申请号：US49218

    申请日：1993-04-19

    申请人： Akira Nagasu ,  Yoshimi Yamamoto ,  Tomoyuki Tobita ,  Toshihiro Onose

    发明人： Akira Nagasu ,  Yoshimi Yamamoto ,  Tomoyuki Tobita ,  Toshihiro Onose

    IPC分类号： G01L13/06 ,  G01L9/00 ,  G01L19/00 ,  G01L19/04 ,  G01L19/06 ,  G01L7/08

    CPC分类号： G01L19/141 ,  G01L19/0038 ,  G01L19/0092 ,  G01L19/0609 ,  G01L19/0618 ,  G01L19/0645

    摘要： A differential pressure transmitter detects a differential pressure condition of a fluid by means of a semiconductor sensor. First and second seal diaphragms are provided in a member which constitutes the differential pressure transmitter, to form first and second pressure receiving chambers. An overload protection diaphragm and first and second damper chambers are provided at positions close to the first and second pressure receiving chambers. Also, there are provided a passage for connecting the first pressure receiving chamber and the first damper chamber, a passage for connecting the second pressure receiving chamber and the second damper chamber, and passages for connecting the first and second damper chambers respectively with the semiconductor sensor. Even when a change is caused in the temperature of a processed fluid to be detected, the differential pressure transmitter quickly detects the temperature change, so that a differential pressure of the processed fluid can be measured with high accuracy.

    摘要翻译： 差压变送器通过半导体传感器检测流体的压差状态。 第一和第二密封隔膜设置在构成差压变送器的构件中，以形成第一和第二压力接收室。 过载保护隔膜和第一和第二阻尼室设置在靠近第一和第二压力接收室的位置处。 另外，设置有用于连接第一受压室和第一阻尼室的通道，用于连接第二受压室和第二阻尼室的通道，以及用于将第一和第二阻尼室分别与半导体传感器 。 即使在检测到的被处理流体的温度发生变化的情况下，差压变送器快速检测温度变化，能够高精度地测量被处理流体的压差。

    Differential pressure transmitter
    9.
    发明授权
    Differential pressure transmitter 失效
    差压变送器

    公开(公告)号：US4342231A

    公开(公告)日：1982-08-03

    申请号：US217025

    申请日：1980-12-16

    申请人： Yoshimi Yamamoto ,  Yoshitaka Matsuoka ,  Syozo Kasai ,  Yukio Takahashi ,  Takeo Nagata ,  Akira Nagasu ,  Tomomasa Yoshida ,  Satoshi Shimada

    发明人： Yoshimi Yamamoto ,  Yoshitaka Matsuoka ,  Syozo Kasai ,  Yukio Takahashi ,  Takeo Nagata ,  Akira Nagasu ,  Tomomasa Yoshida ,  Satoshi Shimada

    IPC分类号： G01L9/00 ,  G01L13/02 ,  G01L7/08 ,  G01L9/06

    CPC分类号： G01L19/147 ,  G01L13/025 ,  G01L19/0038 ,  G01L19/0645 ,  G01L19/142

    摘要： A differential pressure transmitter has a pressure receiving portion and a sensor portion which are constituted from separate parts separably jointed with each other. The sensor portion includes a semiconductor sensor having one side formed with a resistance pattern and the other side which has a thick-walled peripheral portion and a thick-walled central portion. The semiconductor sensor is incorporated in the sensor portion as being supported at the thick-walled peripheral portion thereof. The pressure receiving portion includes seal diaphragms disposed on both sides of the pressure receiving portion and a central diaphragm disposed therein. The semiconductor sensor is arranged such that the side thereof carrying the resistance pattern faces the pressure receiving portion.

    摘要翻译： 差压变送器具有压力接收部分和传感器部分，该压力接收部分和传感器部分由可分离地彼此连接的分开的部分构成。 传感器部分包括半导体传感器，其一侧形成有电阻图案，另一侧具有厚壁周边部分和厚壁中心部分。 半导体传感器被并入传感器部分中，被支撑在其厚壁周边部分。 受压部分包括设置在压力接收部分两侧的密封膜片和设置在其中的中心膜片。 半导体传感器被布置成使得其携带电阻图案的一侧面向压力接收部分。

    Pressure transducer
    10.
    发明授权
    Pressure transducer 失效
    压力传感器

    公开(公告)号：US4321578A

    公开(公告)日：1982-03-23

    申请号：US81372

    申请日：1979-10-03

    申请人： Akira Nagasu ,  Yosimi Yamamoto ,  Takeo Nagata ,  Hiroyasu Uchida ,  Yutaka Sakurai

    发明人： Akira Nagasu ,  Yosimi Yamamoto ,  Takeo Nagata ,  Hiroyasu Uchida ,  Yutaka Sakurai

    IPC分类号： G01L9/04 ,  G01L9/00 ,  G01L13/02

    CPC分类号： G01L19/0645 ,  G01L13/025 ,  G01L19/0038

    摘要： A pressure transducer is arranged to mount a semiconductor pressure sensor in a housing such that the pressure of a high-pressure fluid is applied to one side of the semiconductor pressure sensor through a high pressure seal diaphragm and a sealed liquid in the high pressure side, while the pressure of a low-pressure fluid is applied to the other side of the sensor through a low-pressure seal diaphragm and a sealed liquid in the low pressure side, and a protecting member is provided closer to the low-pressure seal diaphragm.

    摘要翻译： 压力传感器布置成将半导体压力传感器安装在壳体中，使得高压流体的压力通过高压侧的高压密封膜片和密封液体施加到半导体压力传感器的一侧， 同时低压流体的压力通过低压侧的低压密封隔膜和密封液体施加到传感器的另一侧，并且靠近低压密封隔膜设置保护构件。