Kistler Holding Ag

K.k. Holding Ag

Robert Boschgmbh

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Elringklinger Ag

Claudio Cavalloni

Peter Wolfer

Christoph Kern

Steffen Schott

Michael Mueller

Pavlo Saltikov

Reinhold Hess

Michael Kleindl

Reiko Zach

Andrea Bertola

Reinhard Staub

Denis Kohler

Kim Pfluger

Marco Gnielka

Rolf Thiel

Paul Furter

Roland Sommer

Jochen Von Berg

Giovanni Mastrogiacomo

Sandro Brandenberger

Armin Diez

Paul Engeler

Christof Sonderegger

Adrian Hofmann

David Cornu

Thomas Ludwig

Kurt Vollenweider

Andri Michael Lehmann

Leo Amstutz

Stefan Brechbühl

Dieter Karst

Ulrich Staiger

Andreas Goehlich

Juergen Krueger

Ernst Obermeier

Daniel Fürer

Ulrich Albicker

Stephane Kuehne

Biswajit Mukhopadhyay

René Tanner

Gerald Eifler

Daniel Fuerer

Michael Schnepf

Andreas Kirchheim

Ralf Reichau

Roman Strebel

Michael MÜLLER

Jürgen Krüger

A contact force measuring device for measuring a contact force of a spring contact includes a measuring probe having a height in a contact region identical to the height of the contact pin that fits into an opening defined between a pair of opposing spring contact arms of the spring contact. The probe includes an upper insulator element attached to an upper side of a piezoelectric element, and a lower insulator element is attached to a lower side of the piezoelectric element opposite the upper side. The contact force measuring device includes a holding device connected to one end of the probe, an evaluation unit, a supporting device and a positioning device.

Contact force measuring device and process for measuring a contact force using the contact force measuring device

A measurement transducer for simultaneously measuring a force that can be both dynamic and static includes at least one piezoelectric transducer element having element surfaces on which the force generates electrical polarization charges proportional to a magnitude of the force. The measurement transducer includes a resonator element which can be excited to at least one resonance frequency and undergoes a transverse expansion from the action of the force in a transverse direction to the force. The magnitude of the transverse expansion is proportional to the magnitude of the force and causes in the resonance frequency a change that is a function of the force.

Measurement transducer for simultaneously measuring a force that can be both dynamic and static

A measurement transducer for measuring a force includes a resonator element, which can be excited to at least one resonance frequency, and at least one force application element on which the force is applied and which transmits the force to the resonator element. The force application element is a hollow body defining a top surface, a lateral surface and a cavity. The top and lateral surfaces are mechanically connected and enclose the cavity, which contains the resonator element that is mechanically connected to the lateral surface. The lateral surface defines at least one recessed area that extends into the cavity and prevents transmission of the force from the top surface. The lateral surface defines at least one non-recessed area that transmits the force from the top surface.

Measurement transducer for measuring a force

A contact force testing apparatus includes a measuring sensor that can be contacted with an electrical contact element and measures a contact force (F) of a contact with the electrical contact element. The measuring sensor includes piezoelectric material that receives the contact force (F) in a contact region and produces polarization charges. The measuring sensor includes an acceptor electrode that is completely surrounded by piezoelectric material in the contact region in the direction of a thickness extension of the measuring sensor and receives the polarization charges. A method is provided for the use of such a contact force testing apparatus, and a method is provided for producing such a contact force testing apparatus.

Contact force testing apparatus, use of such a contact force testing apparatus and method for producing such a contact force testing apparatus

A contact force testing apparatus includes a measuring sensor that can be contacted with an electrical contact element and measures a contact force (F) of a contact with the electrical contact element of an electrical connector having a male component and a female component. The measuring sensor receives the contact force in a contact region with a piezoelectric pick-up. The measuring sensor includes a plurality of piezoelectric pick-ups that are spaced apart from one another by pick-up gaps. The measuring sensor has a protective sleeve that covers the piezoelectric pick-ups and the pick-up gaps in the contact region.

The invention relates to a component transducer () for sensing a torque component (Mx, My, Mz); wherein an element () made of piezoelectric crystal material comprises element surfaces; wherein a force component (Fx, Fy, Fz) produces electric polarization charges on the element surfaces; and wherein the torque component (Mx, My, Mz) to be sensed consists of at least one pair having force components (+Fx, &#x2212;Fx; +Fy, &#x2212;Fy; +Fz, &#x2212;Fz) wherein said force components (+Fx, &#x2212;Fx; +Fy, &#x2212;Fy; +Fz, &#x2212;Fz) of a pair have the same axis of action and opposite directions of action. The component transducer () receives the force components (+Fx, &#x2212;Fx; +Fy, &#x2212;Fy; +Fz, &#x2212;Fz) of a pair separately.

Component transducer and multi-component transducer using such component transducer as well as use of such multi-component transducer

A measuring element for measuring dynamic pressure, temperature and/or static pressure includes a body made of a piezoelectric material and having opposing side surfaces carrying electrodes. The piezoelectric material of the body is selected in such a manner that a thrust coefficient of the piezoelectric e-tensor is not equal to zero, with the result that the inverse piezoelectric effect can be used, and a transverse coefficient of the piezoelectric d-tensor is not equal to zero and/or a longitudinal coefficient of the piezoelectric d-tensor is not equal to zero, with the result that the transverse piezoelectric effect can be used in the transverse direction and/or the longitudinal piezoelectric effect can be used in the longitudinal direction in a simultaneous manner with the inverse piezoelectric effect.

Piezoelectric measuring element for measuring the dynamic and static pressure and/or the temperature

A micro-electro-mechanical system (MEMS) chip for measuring a pressure in a pressure space includes a MEMS substrate having a measuring region, a contact-making region connected to the measuring region via lines and having contacts, and a bushing region disposed between the measuring region and the contact-making region. The MEMS substrate defines a cavity formed as a blind hole that defines an opening through one side of the MEMS substrate, the bottom of the blind hole forming a membrane. A measuring bridge includes piezoresistive elements disposed on that side of the membrane which faces away from the cavity's opening. A carrier substrate is disposed over the cavity's opening and bonded to the MEMS substrate in a two-dimensional manner to form a rod, with the result that the carrier substrate forms a bottom wall of the cavity spaced apart from the membrane.

MEMS chip, measuring element and pressure sensor for measuring a pressure

Piezoelectric force sensor

An electronic circuit that changes a charge signal into a voltage signal within a sensor suitable for direct installation in a roadway can be connected to two single-core cables that need not be highly insulating yet can realize the required power supply of the electronics. The circuit includes an integrated impedance converter (IEPE) at the output to a two-core cable and a charge amplifier with an ICthat has two inputs. A capacitor Cc is connected in series to the signal output of the sensor at one input of the IC. A Zener diode D is arranged between the ground output of the sensor and the second input of the ICand can be supplied with power by a resistor Rin conjunction with a power supply arranged on the output side in order to adapt the potential at the second input of the IC

Charge to voltage conversion circuit for WIM sensor and WIM sensor with same

A pressure measuring device suitable for disposition in a chamber of an internal combustion engine. The pressure measuring device has a housing, a force transmitting element that is effectively connected to a pressure sensor, and a sensor cage that surrounds the pressure sensor. The sensor cage is connected to the housing by a circumferential weld seam only at one connection segment of the housing. In this way, it is possible to achieve a defined pre-tensioning of a metal diaphragm that is connected on the one hand to the sensor cage and on the other hand to the force transmitting element.

Pressure measuring device

A piezoelectric measuring element comprises at least one bar with transverse effect which can be used with two conductor technology. Poles comprising the metallizations, electrodes and lines in the measuring element are embodied with one or more piezoelectric bars with transverse effect such that the electric capacitances thereof with respect to the housing are identical. There can be a completely symmetrical design of the poles. A capacitor from one pole to the housing can correspond to the difference in capacitance of both poles to the environment.

Piezoelectric measuring element with transverse effect and sensor comprising such a measuring element

The invention relates to a component for installation in force or pressure sensors, in particular in a glow plug. The component comprises a disc-type or punched-disc type measuring element consisting of a piezoelectric material, punched-disc type or disc-type electrodes that lie on either side of the measuring element. The electrodes have contact points for contacting conductors. The component comprises in addition a respective transmission body or several transmission bodies that are located outside the electrodes, on either side of the latter. The measuring element, electrodes and transmission bodies are held together mechanically by an external, electrically insulating film.

Component for piezoelectric force or pressure sensors, held together by an electrically insulating film

A sensor unit for measuring a measurement variable in a medium, in particular in an aggressive liquid or gaseous medium, comprises a sensor that is arranged in a sensor capsule and has a sensor region that is arranged on a base body. In order to detect the measurement variable in the sensor region, a measurement opening is provided in the sensor capsule. On a side facing the measurement opening, the sensor region has a measurement surface that is provided with measurement electronics. An electrical supply line is provided on the sensor for the purpose of transmitting a sensor signal that is generated by the measurement electronics. A plated-through hole is provided in the base body. The plated-through hole is used to connect the measurement electronics to the electrical supply line via signals through the base body, on a base side of the sensor that faces away from the measurement opening.

Sensor unit for the measurment of a variable in a medium

The invention relates to a sensor unit for measuring a measurable variable, especially in an aggressive medium. Said sensor unit comprises a sensor which is disposed in a sensor casing and is provided with a sensor zone located on a base. In order to detect the measurable variable in the sensor zone, a measuring hole which allows the medium to advance directly to the sensor zone is provided in the sensor casing. A side of the sensor zone that faces away from the measuring hole is equipped with a measuring surface which encompasses measuring electronics. An electrical feeder is provided on the sensor in order to transmit a sensor signal generated by the measuring electronics. The sensor is sealingly arranged on a sealing surface located on the sensor casing in such a way that the measuring surface is isolated from the medium. A mechanism is provided by means of a which the sensor can be disconnected from thermally and/or mechanically induced changes in the sensor casing. There also is a probe comprising a sensor unit, as well as an internal combustion engine, a hydraulic or pneumatic tool, and an air conditioner encompassing a sensor unit.

Sensor Unit

Growing community of inventors

Regensdorf, Switzerland

Claudio Cavalloni