Development of Metallic Digital Strain Gauges

Digital Pressure Gauges with Alarms

Accuracy Includes linearity, hysteresis, repeatability ±0.25% of full scale ±1 least significant digit Display 4 readings per second nominal display update rate 4 digit LCD, 0.5" H main display 5 character 0.25" H alphanumeric lower display Alarm 1 and Alarm 2 LCD indicators and bi-color (red/green) LEDs Controls & Functions SEL Select and display alarm trip points TEST Alarm acknowledge, or to...

Nonlinearity and Hysteresis of Resonant Strain Gauges

Nonlinearity and hysteresis effects of electrostatically activated, voltage driven resonant microbridges have been studied theoretically and experimentally. It is shown, that, in order to avoid vibration instability and hysteresis to occur, the choices of the ax . and d.c. driving voltages and of the quality factor of a resonator, with a given geometry and choice of materials, are limited by a ...

Calculation of Long Bone Loading Using Strain Gauges

The standard methodology for measuring loads in long bones is the in situ load cell, which enables direct measurements, but alters the stiffness and mass of the subject bone. Bone loading can also be calculated by applying linear beam theory to measurements from strain gauges affixed to the bone surface. The efficacy of the strain gauge method was assessed in this study by mounting three strain...

Embedded Strain Gauges for Condition Monitoring of Silicone Gaskets

A miniaturized strain gauge with a thickness of 5 µm is molded into a silicone O-ring. This is a first step toward embedding sensors in gaskets for structural health monitoring. The signal of the integrated sensor exhibits a linear correlation with the contact pressure of the O-ring. This affords the opportunity to monitor the gasket condition during installation. Thus, damages caused by faulty...

Measurement of strains in fixed bridges with electronic strain gauges.