Patents by Inventor Elmar Wosnitza
Elmar Wosnitza has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9989431Abstract: 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.Type: GrantFiled: November 14, 2014Date of Patent: June 5, 2018Assignee: ENDRESS + HAUSER GMBH + CO. KGInventors: Andreas Rossberg, Olaf Textor, Elmar Wosnitza
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Patent number: 9897502Abstract: 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.Type: GrantFiled: August 11, 2014Date of Patent: February 20, 2018Assignee: Endress + Hauser GmbH + Co. KGInventors: Elmar Wosnitza, Davide Parrotto, Lars Karweck, Ulrich Buder, Olaf Textor
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Publication number: 20160305836Abstract: 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.Type: ApplicationFiled: November 14, 2014Publication date: October 20, 2016Inventors: Andreas Rossberg, Olaf Textor, Elmar Wosnitza
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Patent number: 9470773Abstract: A method for operating a pressure sensor, which includes a measuring membrane, at least one platform and a capacitive transducer having two pressure dependent capacitances between electrodes on the measuring membrane. The measuring membrane divides a volume pressure-tightly into two volume portions, wherein the second volume portion is enclosed in a measuring chamber between the measuring membrane and the platform. A deflection of the measuring membrane depends on a pressure measurement variable p, which is a difference between a first pressure p1 and second pressure p2 in the volume portions. The pressure measurement variable p follows from both capacitances, wherein, for an intact pressure sensor, the second capacitance is a predetermined function of the first capacitance and, in given cases, the temperature.Type: GrantFiled: June 1, 2012Date of Patent: October 18, 2016Assignee: Endress + Hauser GmbH + Co. KGInventors: Thomas Uehlin, Elmar Wosnitza, Igor Getman
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Publication number: 20160231187Abstract: 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.Type: ApplicationFiled: August 11, 2014Publication date: August 11, 2016Applicant: Endress + Hauser GmbH + Co. KGInventors: Elmar Wosnitza, Davide Parrotto, Lars Karweck, Ulrich Buder, Olaf Textor
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Patent number: 8763466Abstract: A gauge pressure sensor for determining the pressure of a medium by means of a housing and by means of a measuring element, which is positioned in the housing, wherein an outwards facing side of the measuring element is in contact with the medium and is exposed to the pressure, which is to be measured. A tube for a reference pressure is provided, which conducts ambient air to the measuring element, and by means of at least one dehumidifying chamber, positioned in the housing, for the collection of air moisture.Type: GrantFiled: February 28, 2011Date of Patent: July 1, 2014Assignee: Endress + Hauser GmbH + Co. KGInventors: Elmar Wosnitza, Michael Hugel, Sergej Lopatin, Thomas Uehlin, Olaf Textor, Hansjorg Brock
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Patent number: 8746073Abstract: A method for the compensating temperature gradient influences on a pressure measuring transducer, comprising the steps of: registering a pressure signal Sp(t); registering a temperature signal T(t); ascertaining a pressure measured value ps(Sp(t), T(t)); determining the time derivative of the temperature signal dT/dt; correcting the pressure measured value with a correction function, which depends on the time derivative, wherein, as a function of the sign of the time derivative, another correction function is selected, or other coefficients in a function of equal type are selected.Type: GrantFiled: June 22, 2010Date of Patent: June 10, 2014Assignee: Endress + GmbH + Co. KGInventors: Igor Getman, Manuel Bondi-Liedtke, Thomas Uehlin, Elmar Wosnitza
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Publication number: 20140144206Abstract: A method for operating a pressure sensor, which includes a measuring membrane, at least one platform and a capacitive transducer having two pressure dependent capacitances between electrodes on the measuring membrane The measuring membrane divides a volume pressure-tightly into two volume portions, wherein the second volume portion is enclosed in a measuring chamber between the measuring membrane and the platform. A deflection of the measuring membrane depends on a pressure measurement variable p, which is a difference between a first pressure p1 and second pressure p2 in the volume portions. The pressure measurement variable p follows from both capacitances, wherein, for an intact pressure sensor, the second capacitance is a predetermined function of the first capacitance and, in given cases, the temperature.Type: ApplicationFiled: June 1, 2012Publication date: May 29, 2014Applicant: Endress + Hauser GmbH + Co. KGInventors: Thomas Uehlin, Elmar Wosnitza, Igor Getman
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Publication number: 20130019687Abstract: A gauge pressure sensor for determining the pressure of a medium by means of a housing and by means of a measuring element, which is positioned in the housing, wherein an outwards facing side of the measuring element is in contact with the medium and is exposed to the pressure, which is to be measured. A tube for a reference pressure is provided, which conducts ambient air to the measuring element, and by means of at least one dehumidifying chamber, positioned in the housing, for the collection of air moisture.Type: ApplicationFiled: February 28, 2011Publication date: January 24, 2013Applicant: Endress + Hauser + Co.KGInventors: Elmar Wosnitza, Michael Hugel, Sergej Lopatin, Thomas Uehlin, Olaf Textor, Hansjorg Brock
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Publication number: 20120118065Abstract: A method for the compensating temperature gradient influences on a pressure measuring transducer, comprising the steps of: registering a pressure signal Sp(t); registering a temperature signal T(t); ascertaining a pressure measured value ps(Sp(t), T(t)); determining the time derivative of the temperature signal dT/dt; correcting the pressure measured value with a correction function, which depends on the time derivative, wherein, as a function of the sign of the time derivative, another correction function is selected, or other coefficients in a function of equal type are selected.Type: ApplicationFiled: June 22, 2010Publication date: May 17, 2012Inventors: Igor Getman, Manuel Biondi Liedtke, Thomas Uehlin, Elmar Wosnitza