50 CONTROL OF MACHINES 2 . 16 PRESSURE TRANSDUCER

50 CONTROL OF MACHINES 2 . 16 PRESSURE TRANSDUCER

50 CONTROL OF MACHINES 2 . 16 PRESSURE TRANSDUCER

50 control of machines 2 16 pressure transducer

50 control of machines 2 16 pressure transducer

50 CONTROL OF MACHINES 2 . 16 PRESSURE TRANSDUCER A pressure transducer is an important pilot device of modern machines used in industry and controlled by programmable controllers . A pressure transducer utilizes piezo electric or semiconductor strain gauges to measure presssure . Semi-conductor strain gauges are very small, typical dimension being 0 . 3 inch overall length, 0 . 01 inch width and 0 . 001 inch thick. A strain gauge changes its resistivity when it is stressed, the change in resistivity being proportional to the strain produced in the gauge due to external stress . In pressure transducers the strain gauges are epoxy bounded on the metallic diaphragm of pressure transducers . The four strain gauges Rsg1, Rsg2, Rsg3 and Rsg4 bonded on the diaphram are connected in the Wheat Stone bridge as shown in Fig. 2 . 39 . Two strain gauges Rsg2 and Rsg4 are mounted such that increase of pressure increases their resistance and the other two strain gauges Rsg2 and Rsg3 are so mounted that increase of pressure decreases their resistance .

You may also like...