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1. 发明授权

US09989431B2 Multilevel pressure sensor 有权
公开(公告)号：US09989431B2
公开(公告)日：2018-06-05
申请号：US15103107
申请日：2014-11-14
申请人： Endress + Hauser GmbH + Co. KG
发明人： Andreas Rossberg , Olaf Textor , Elmar Wosnitza
IPC分类号： G01L9/00
CPC分类号： G01L9/0072 , G01L9/0051
摘要： A pressure sensor comprises a deformable measuring diaphragm, and a mating body connected in a pressure-tight manner and forms a measuring chamber in which a reference pressure is present. A pressure can be applied to an outside of the measuring diaphragm. The pressure sensor has a capacitive transducer having at least one mating body electrode and at least one diaphragm electrode. Above a pressure limit value for the pressure, at least one central surface section of the measuring diaphragm rests against the mating body with a contact surface area, the size of which is dependent on the pressure. The pressure sensor also has a resistive transducer for converting a pressure-dependent deformation of the measuring diaphragm, when pressed in a range of values above the pressure limit value, into an electrical signal using an electrical resistance which is dependent on the contact surface area of the measuring diaphragm on the mating body.

2. 发明授权

US09897502B2 Pressure transducer 有权
公开(公告)号：US09897502B2
公开(公告)日：2018-02-20
申请号：US15022254
申请日：2014-08-11
申请人： Endress + Hauser GmbH + Co. KG
发明人： Elmar Wosnitza , Davide Parrotto , Lars Karweck , Ulrich Buder , Olaf Textor
IPC分类号： G01L19/04 , G01L27/00 , G01L9/00
CPC分类号： G01L9/0052 , G01L19/04 , G01L27/007
摘要： A pressure transducer comprising a resistive pressure sensor element with a measurement membrane which has at least four resistor elements. The resistor elements are arranged in a full-bridge circuit, having a longitudinal direction in which the full bridge circuit is to be supplied with a constant current. When being supplied with the constant current, a longitudinal voltage has a first pressure dependency and a first temperature dependency, and a diagonal voltage has a second pressure dependency and a second temperature dependency, the second pressure dependency being greater than the first pressure dependency at a given temperature. The pressure transducer has a processing circuit which is designed to determine a measured pressure value at least using the diagonal voltage and optionally the longitudinal voltage. The processing circuit is further designed to check whether a value pair of a longitudinal voltage and a diagonal voltage corresponds to an expected functional relationship at a current temperature.

3. 发明申请

US20160231187A1 Pressure Transducer 有权
标题翻译：压力传感器
公开(公告)号：US20160231187A1
公开(公告)日：2016-08-11
申请号：US15022254
申请日：2014-08-11
申请人： ENDRESS+HAUSER GMBH+CO. KG
发明人： Elmar Wosnitza , Davide Parrotto , Lars Karweck , Ulrich Buder , Olaf Textor
IPC分类号： G01L9/00
CPC分类号： G01L9/0052 , G01L19/04 , G01L27/007
摘要： A pressure transducer comprising a resistive pressure sensor element with a measurement membrane which has at least four resistor elements. The resistor elements are arranged in a full-bridge circuit, having a longitudinal direction in which the full bridge circuit is to be supplied. When supplying a constant current, a longitudinal voltage has a first pressure dependency and a first temperature dependency, and a diagonal voltage has a second pressure dependency and a second temperature dependency, the second pressure dependency being greater than the first pressure dependency at a given temperature. The pressure transducer has a processing circuit which is designed to determine a measured pressure value at least using the diagonal voltage and optionally the longitudinal voltage. The processing circuit is further designed to check whether a value pair of a longitudinal voltage and a diagonal voltage corresponds to an expected functional relationship at a current temperature.
摘要翻译：一种压力传感器，包括具有至少四个电阻元件的测量膜的电阻式压力传感器元件。电阻元件布置在全桥电路中，具有要供应全桥电路的纵向方向。当提供恒定电流时，纵向电压具有第一压力依赖性和第一温度依赖性，并且对角线电压具有第二压力依赖性和第二温度依赖性，所述第二压力依赖性大于在给定温度下的第一压力依赖性。压力传感器具有处理电路，其被设计成至少使用对角线电压和可选的纵向电压来确定测量的压力值。处理电路进一步被设计为检查纵向电压和对角线电压的值对是否对应于当前温度下的预期功能关系。

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