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    • 1. 发明授权
    • Differential pressure transmitter
    • 差压变送器
    • US5012677A
    • 1991-05-07
    • US275580
    • 1988-11-23
    • Satoshi ShimadaYasushi ShimizuSeiichi Ugai
    • Satoshi ShimadaYasushi ShimizuSeiichi Ugai
    • G01L13/06G01L9/00G01L13/02G01L19/00
    • G01L19/147G01L13/025G01L19/0092G01L19/0645G01L19/148
    • A differential pressure transmitter is an improvement over the drawbacks of conventional apparatuses and provides a differential pressure transmitter which compensates for adverse effects of a static pressure by using a static pressure detecting piezoresistive gauge. The transmitter includes a highly sensitive static pressure sensor with high outputs, and a composite sensor with small crosstalk between the static pressure sensor and a differential pressure sensor. The differential pressure transmitter is constructed of semiconductor sensor substrate and a fixed mount on which the sensor substrate is securely mounted; whereby the differential pressure of a fluid is detected by utilizing the difference in Young's modulus between the sensor substrate and the mount. The sensor substrate is processed on one side or on both sides to make a part of the sensor substrate thinner than the surrounding parts and thereby cause a peak stress due to a static pressure load to occur at the thin part, and a change in resistance of a semiconductor piezoresistive gauge formed at that thin portion is detected.
    • 差压变送器是对常规设备的缺点的改进,并且提供了一种通过使用静压检测压阻式压力补偿静压的不利影响的差压变送器。 变送器包括具有高输出的高灵敏度静压传感器,以及静压传感器和压差传感器之间具有小串扰的复合传感器。 差压变送器由半导体传感器基板和传感器基板固定在其上的固定支架构成; 由此通过利用传感器基板和安装座之间的杨氏模量的差异来检测流体的压差。 传感器基板在一侧或两侧进行处理,使得传感器基板的一部分比周围部分薄,从而在薄部分产生由于静压力引起的峰值应力,并且电阻变化 检测在该薄部分处形成的半导体压阻计。
    • 2. 发明授权
    • Multi-functional sensor
    • 多功能传感器
    • US4986127A
    • 1991-01-22
    • US333246
    • 1989-04-05
    • Satoshi ShimadaSeiichi UgaiAkira SaseYasushi Shimizu
    • Satoshi ShimadaSeiichi UgaiAkira SaseYasushi Shimizu
    • G01L9/04G01F1/38G01K7/16G01L9/00G01L13/02G01L27/00H01L29/84
    • G01L19/147G01F1/383G01L13/026G01L19/003G01L19/0645G01L9/0054G01L9/045
    • Multi-functional sensor comprises a support base made from borosilicate, a diaphragm with a E-shaped section secured to the base, the diaphragm being made from single crystalline silicon, principal plane thereof being oriented to be a crystalline plane (110), a differential pressure sensor having p-doped piezoresistor elements formed in the principal plane of the diaphragm at a thin wall portion of the E-shaped sectional diaphragm, each element being arranged along a crystal axis , a static pressure sensor having p-doped piezoresistor elements formed in the principal plane at an outer peripheral thick wall portion of the E-shaped sectional diaphragm, each element being arranged along the crystal axis , and a temperature sensor having a p-doped piezoresistor element formed in the principal plane at the outer peripheral thick wall portion of the E-shaped sectional diaphragm, the element being arranged along the crystal axis . In the multi-functional sensor thus constructed, deviation of the output signal from the differential pressure sensor due to the influence of the temperature and static pressure can be removed easily to obtain the correct signal.
    • 多功能传感器包括由硼硅酸盐制成的支撑基座,具有固定到基部的E形截面的隔膜,隔膜由单晶硅制成,其主面被定向为晶面(110),差动 压电传感器,其具有在E形截面光阑的薄壁部分处形成在膜片的主平面中的p掺杂的压电电阻元件,每个元件沿着晶轴<111>布置,静压传感器具有p掺杂的压电电阻 在E形截面光阑的外周厚壁部分的主平面上形成的元件,每个元件沿着晶轴<111>布置,并且具有在主平面上形成的p掺杂的压电电阻元件的温度传感器 E形截面膜片的外周厚壁部分,该元件沿着晶轴<100>排列。 在这样构成的多功能传感器中,由于温度和静压的影响,输出信号与差压传感器的偏差可以容易地消除,从而获得正确的信号。
    • 6. 发明授权
    • Multiple-function fluid measuring and transmitting apparatus
    • 多功能流体测量和传输装置
    • US5469749A
    • 1995-11-28
    • US411922
    • 1995-03-28
    • Satoshi ShimadaSeiichi UgaiTomoyuki TobitaYoshimi Yamamoto
    • Satoshi ShimadaSeiichi UgaiTomoyuki TobitaYoshimi Yamamoto
    • G01F1/38G01F1/36G01F1/37G01F1/42G01F1/44G01F1/50G01F15/02G01F23/14G01F23/16G01L9/00G01L19/00G01L7/08
    • G01F1/363G01F1/372G01F1/383G01F1/44G01F23/164G01L19/0092G01L9/0054
    • A measuring and controlling system is provided which has a control function as well as a measurement function to perform the measurement and control of fluid amounts such as the flow rate, pressure, liquid level, weight and so on by itself in the same field. A pressure receiving unit is directly mounted on a pipe or a container, in which a fluid under measurement exists, in order to detect the temperature, differential pressure and static pressure of the fluid under measurement independently of each other. Means for storing the characteristic of fluids under measurement is provided such that the mass flow rate, weight and liquid level can be calculated. By providing the transmitter with the measurement and control functions, the measurement and control of fluid amounts such as flow rate, pressure, liquid level, weight and so on can be performed in a closed form, thereby making it possible to simplify a correction procedure for the static pressure and temperature, improve the responsibility, and enhance the control performance of the whole plant. Also, a measuring and controlling system can be realized which reduces a wiring amount for connecting with an upper level control unit.
    • 提供了一种测量和控制系统,其具有控制功能和测量功能,以在相同的领域中自身进行流量,压力,液位,重量等流体量的测量和控制。 压力接收单元直接安装在其上存在测量流体的管道或容器上,以便彼此独立地检测待测流体的温度,压差和静压力。 提供了用于存储测量流体特性的装置,以便可以计算质量流量,重量和液位。 通过向变送器提供测量和控制功能,可以以封闭形式执行流量,压力,液位,重量等流体量的测量和控制,从而可以简化对 静态压力和温度,提高责任感,提高整厂的控制性能。 此外,可以实现减少与上位控制单元连接的配线量的测量和控制系统。