A sensor may include a bladder, and a deformable conductor disposed on the bladder such that deformation of the bladder causes deformation of the deformable conductor, wherein the bladder is constrained so as to enhance the deformation of the conductor in response to the deformation of the bladder. A method may include applying a stimulus to a bladder having a deformable conductor attached thereto, detecting a change in an electrical characteristic associated with the deformable conductor in response to the stimulus, and selectively constraining the bladder to amplify the change in electrical characteristic in response to the stimulus.

A strain gauge includes a flexible substrate; and resistors each formed of a Cr composite film. The resistors include a first resistor and a second resistor that are formed on one side of the substrate, and include a third resistor and a fourth resistor that are formed on another side of the substrate. The first resistor, the second resistor, the third resistor, and the fourth resistor constitute a Wheatstone bridge circuit.

A multi-modal field-programmable metamorphic sensor is provided. The metamorphic sensor has a multi-layer structure, including an upper electrode layer, a spacer layer, and a lower electrode layer. At least one of the upper electrode layer and the lower electrode layer is a sensor A. The spacer layer is disposed between the electrode layers. A sensor B is formed through forming a structure of electrode layer-spacer layer-electrode layer structure. When detecting an object, the measurement of different physical quantities of different objects is implemented through switching between the sensor A and the sensor B. The sensor serves as a single cell. Multiple single cells are combined to form a multi-cell sensor. A signal acquisition system for acquiring signal of the sensor is also provided.

A circuit is provided that includes a strain gauge resistor having a center axis and multiple conductor layer segments and a trim region extending along the center axis; wherein a first portion of the strain gauge resistor is located on one side of the center axis and a second portion of the strain gauge resistor is located on an opposite side of the center axis.

A weldable strain sensor assembly configured to be joined to an instrumented component includes: a stand-off; a substrate disposed on top of the stand-off; and a sensing component disposed on a top or a bottom of the substrate; wherein the combination of the stand-off and the substrate are configured to suspend the sensing component over the instrumented component with a defined gap between the instrumented component and at least one of: the substrate; and, the sensing component.

Methods and apparatuses for using a structure as a sensor are disclosed. An apparatus in accordance with an aspect of the present disclosure comprises an additively-manufactured component comprising a channel, a sensor including an connection point, wherein the sensor is arranged in the channel, and an adhesive arranged in the channel, the adhesive coupling the additively-manufactured component to the sensor, such that the connection point is accessible external to the adhesive, the sensor being configured to provide a signal at the connection point, wherein the signal provides information of an applied force on the additively-manufactured component.

The present application provides a strain sensing film, a pressure sensor, and a hybrid strain sensing system. The strain sensing film includes a semiconductor thin-film, at least two resistors are disposed on the semiconductor thin-film, one resistor has a different response to a strain with respect to at least another resistor, thereby enhancing resistance to external environmental disturbances and improving the accuracy of pressure measurements.

A force transducer capable of measuring tension and/or compression loads, including a generally rectangular flexure body made of high modules of elasticity material having through cuts that divide the body into an S shaped force transmission path. Strain gages are strategically located on the inside surfaces of a central opening and are connected into a bridge circuit mounted on a printed circuit board which is integrally attached to said body. Printed circuit means are provided for conditioning and transmitting signals from the bridge circuit either through hardwiring or wirelessly. A battery powered embodiment is described. Various configurations of covers for the device are shown.

Systems and methods for wireless telemetry in oil and gas wells use fluid pressure differentials to send signals from surface equipment to a downhole tool. More specifically, the methods and systems selectively apply fluid pressure to a tubing string and measure the resulting mechanical strain, or deformation, on a tubular of the downhole tool. The deformation may be an elastic deformation or it may be a plastic deformation with yielding of the tubular. One or more of such strains or deformations may be used to encode a digital signal that can command an action on the tool. The strain or deformation may be measured by a low-cost strain gauge.

A sensor device (16a-16d) is provided for monitoring a clamping force (F) exerted by a clamping element (11a-11d) of a clamping device (12a-12d) on a component (14), with at least one strain gauge (30a-30d), which can be arranged on a surface (90, 91) of the clamping element (11a-11d) of the clamping device (12a-12d) and is deformable under the clamping force (F), a transmission module unit (36) based on electromagnetic transmission technology connected to the at least one strain gauge (30a-30d) for detecting a voltage (U5) that is indicative of a deformation (f) of the at least one strain gauge (30a-30d), and an antenna element (38) connected to the transmission module unit (36) for transmitting a signal that is indicative of the detected voltage (U5), and for receiving electromagnetic energy for electrical supply of the transmission module unit (36) and at least one strain gauge (30a-30d).