Abstract

Systems and methods are disclosed for monitoring corrosion of a structure by using the structure itself as part of the electrochemical measurement. According to some implementations, linear polarization resistance (LPR) sensor devices for direct monitoring of corrosion on a structure are presented. According to certain innovations herein, a sensor device may include three electrodes, such as a counter electrode, a reference electrode, and a working electrode comprised of the structure being monitored. In further embodiments, each electrode may be configured on a polymer flexible substrate cable such as polyimide, with each electrode fabricated from a noble metal, for example, gold-plated copper, or metal systems in which the exterior surface will not oxidize from environmental exposure.

IPC Classes  ?

• G01N 27/07 - Construction of measuring vesselsElectrodes therefor
• G01N 17/02 - Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
• G01N 17/04 - Corrosion probes

Abstract

Systems and methods are disclosed for monitoring corrosion of a structure by using the structure itself as part of the electrochemical measurement. According to some implementations, linear polarization resistance (LPR) sensor devices for direct monitoring of corrosion on a structure are presented. According to certain innovations herein, a sensor device may include three electrodes, such as a counter electrode, a reference electrode, and a working electrode comprised of the structure being monitored. In further embodiments, each electrode may be configured on a polymer flexible substrate cable such as polyimide, with each electrode fabricated from a noble metal, for example, gold-plated copper, or metal systems in which the exterior surface will not oxidize from environmental exposure.

IPC Classes  ?

• G01N 17/02 - Electrochemical measuring systems for weathering, corrosion or corrosion-protection measurement
• G01N 27/04 - Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
• G01N 27/30 - Electrodes, e.g. test electrodesHalf-cells

Abstract

A strain sensing apparatus including a deformable substrate is presented. The deformable substrate is configured to detect a strain of the body that can be coupled to the deformable substrate. Sometimes, the deformable substrate is a flexible substrate having an upper surface and an opposite lower surface. The lower can be coupled to the body. There are sensing elements fabricated within the flexible substrate and proximate to the upper surface to detect properties of the body. The strain sensing apparatus is able to detect different strain modes, such as whether the strain is the result of bending of a body or a uniaxial elongation. Furthermore, the apparatus is small and less fragile than most conventional sensors, making it easy to use.

IPC Classes  ?

• G01B 7/16 - Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge

Abstract

The innovations herein include a compact sensing device that is capable of measuring the conditions (e,g, pressure, temperature) inside a cylinder of an internal combustion engine. Aspects also include a cost-effective method of fabricating the sensing device. An exemplary sensing device includes a substrate, a beam, and piezo-resistive sensing elements. The beam, which is formed on the substrate, is capable of deflecting according to different pressures applied to different beam surfaces. The piezo-resistive sensing elements are coupled to the beam and detect beam deflection. The piezo-resistive sensing elements generate an electrical signal corresponding to the beam deflection.

IPC Classes  ?

• G01L 9/06 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers of piezo-resistive devices

Abstract

The invention is a compact sensing device that is capable of measuring the conditions (e,g, pressure, temperature) inside a cylinder of an internal combustion engine. The invention is also a cost-effective method of fabricating the sensing device. The sensing device includes a substrate, a beam, and piezo-resistive sensing elements. The beam, which is formed on the substrate, is capable of deflecting according to different pressures applied to different beam surfaces. The piezo-resistive sensing elements are coupled to the beam and detect beam deflection. The piezo-resistive sensing elements generate an electrical signal corresponding to the beam deflection.

IPC Classes  ?

• G01L 9/06 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers of piezo-resistive devices

Abstract

The invention is a compact sensing device that is capable of measuring the conditions (e,g, pressure, temperature) inside a cylinder of an internal combustion engine. The invention is also a cost-effective method of fabricating the sensing device. The sensing device includes a substrate, a beam, and piezo-resistive sensing elements. The beam, which is formed on the substrate, is capable of deflecting according to different pressures applied to different beam surfaces. The piezo-resistive sensing elements are coupled to the beam and detect beam deflection. The piezo-resistive sensing elements generate an electrical signal corresponding to the beam deflection.

IPC Classes  ?

• G01L 9/06 - Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by electric or magnetic pressure-sensitive elementsTransmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers of piezo-resistive devices