A method and system for measuring a load on a tire while the vehicle traveling that include a microprocessor, a tire pressure sensor that is fixed to the tire, and an electromechanical sensor that is fixed to a point on the tire. The electromechanical sensor generates a beginning signal when the point begins to be part of the flat tire contact patch of the tire with the ground, and an ending signal when this point ceases to be part of the patch. The microprocessor calculates the patch contact time period, calculates the flat tire contact patch length from the radius of the tire and the ratio between the patch contact time period and the complete tire rotation period, and calculates the load on the tire from the tire pressure as measured by the pressure sensor and the length of the flat tire contact patch.

A method for manufacturing a pressure detecting unit for a measuring device for measuring a pressure status value of a plant specimen. The method includes mounting a sensor unit for detecting the pressure status value at a carrier substrate, fastening a frame to the carrier substrate, the frame including a fastening surface, a contact surface oriented opposite the fastening surface and an inner surface defining an opening and extending between the fastening surface and the contact surface, the frame being situated at the carrier substrate in such a way that the fastening surface faces the carrier substrate and the inner surface surrounds the sensor unit, and filling the opening of the frame with a filling material for forming an elastic pressure coupling layer. A pressure detecting unit for a measuring device for measuring a pressure status value of a plant specimen is also described.

A pressure sensor to measure low pressures, including: a body extending in a plane, the body including a measurement zone situated at an end of the body, a connection zone situated at another end of the body, the measurement zone including a cavity delimited by a wall, that is deformable under effect of a difference in pressure between inside of the cavity and an external environment, the deformable wall situated at rest in a plane parallel to the plane of the sensor; a mechanism measuring deformation of the deformable wall, the measurement mechanism situated in the cavity; an electrical connection connecting the measurement mechanism to the connection zone, the electrical connection arranged in the body.

In micromechanical pressure sensor device and a corresponding production method, the micromechanical pressure sensor device is provided with a first diaphragm; an adjacent first cavity; a first deformation detection device situated in and/or on the first diaphragm for detecting a deformation of the first diaphragm as a consequence of an applied external pressure change and as a consequence of an internal mechanical deformation of the pressure sensor device; a second diaphragm; an adjacent second cavity; and a second deformation detection device situated in and/or on the second diaphragm for detecting a deformation of the second diaphragm as a consequence of the internal mechanical deformation of the pressure sensor device, where the second diaphragm is developed in such a way that it is not deformable as a consequence of the external pressure change.

A field device for processing and automation technology includes a first and a second component that can each be mechanically connected at a joining surface by means of a joining point. Two metal surface layers are each applied at least to the joining surface of the first component and the joining surface of the second component. The metal of the surface layers is different from the metal of the first and/or the metal of the second component. A joining material is applied between the respective joining surfaces of the two components, wherein the joining material includes particles at least partially consisting of a metal that corresponds with the metal of the surface layers The joining of the two components occurs at a joining temperature below 300° C.

A piezoelectric sensor includes an elastic body having a first surface, a regulatory section which is disposed at a position where the regulatory section faces the first surface of the elastic body, and which is configured to limit a deformation of the elastic body, and a first piezoelectric element which is partially fixed to the regulatory section, and which deforms in accordance with the deformation of the elastic body, wherein the first piezoelectric element outputs a voltage signal which increases and decreases from a reference voltage in accordance with a direction of the deformation.

A sensor for detecting the pressure of a fluid has a sensor body having at least one first body part and one second body part. The first body part and the second body part are joined together in such a way that a first face of the first body part faces a first face of the second body part, at a distance therefrom.

The pressure sensor has a circuit arrangement, which includes at least one first electrical circuit that extends at least in part in an area corresponding to a membrane portion and is configured for detecting an elastic flexure or deformation thereof.

The first electrical circuit is associated to the first face of one of the first body part and the second body part, and the first face of the other one of the first body part and the second body part forms or has associated thereto at least one circuit element, prearranged for interacting with the first electrical circuit when an elastic flexure or deformation of the membrane portion is of a degree at least equal to a substantially predetermined limit, to generate thereby information or a warning representative of at least one from among an excessive pressure of the fluid, an incorrect pressure measurement, and an anomalous state of the device.

A piezoelectric sensor includes a substrate, a meta-membrane adhered to the substrate, and a piezoelectric element adhered to the meta-membrane. The substrate includes a support frame which laterally surrounds and partly defines a recess and a cover film which overlies and partly defines the recess. The support frame supports the cover film along an entire periphery of the cover film. The meta-membrane is adhered to the cover film of the substrate. In accordance with one embodiment, the meta-membrane has an auxetic bi-axial kirigami honeycomb structure. In accordance with another embodiment, the meta-membrane has an auxetic hexagonal honeycomb structure. The meta-membrane is adhered to the substrate and to the piezoelectric element using elastic glue. In one proposed implementation, the substrate and meta-membrane are made of polycarbonate and the piezoelectric element comprises a piezoelectric substrate made of polyvinylidene fluoride.

A MEMS switch is actuatable by a fluid, and includes a piezoelectric pressure sensor that detects the movement of a fluid generating a negative pressure. The piezoelectric pressure sensor is formed by a chip of semiconductor material having a through cavity and a sensitive membrane, which extends over the through cavity and has a first and a second surface. The piezoelectric pressure sensor is mounted on a face of a board having a through hole so that the through cavity overlies and is in fluid connection with the through hole. The board has a fixing structure, which enables securing in an opening of a partition wall separating a first and a second space from each other. The board is arranged so that the first surface of the sensitive membrane faces the first space, and the second surface of the sensitive membrane faces the second space.

PMUT acoustic transducer formed in a body of semiconductor material having a face and accommodating a plurality of first buried cavities, having an annular shape, arranged concentrically with each other and extending at a distance from the face of the body. The first buried cavities delimit from below a plurality of first membranes formed by the body so that each first membrane extends between a respective first buried cavity of the plurality of first buried cavities and the face of the body. A plurality of piezoelectric elements extend on the face of the body, each piezoelectric element extending above a respective first membrane of the plurality of first membranes. The first membranes have different widths, variable between a minimum value and a maximum value.