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Text version of the page
| Half bridge, LVDT and digital transducers | ||||||||||||||||||||
| 7 | ||||||||||||||||||||
| Conventional half bridge | ||||||||||||||||||||
| The Linear Variable Differential Transformer (LVDT) and Half-Bridge are two alternative approaches to the coil format and are described in this section. LVDT and HalfBridge transducers convert the movement of a core within the magnetic field produced by an energised coil into a detectable electrical signal. | ||||||||||||||||||||
| Conventional Half Bridge The Half Bridge transducer forms half of a Wheatstone bridge circuit, which enables change from null to be readily determined. The other half of the bridge is built into the amplifier. When the core is in a central position, the two signals VA and VB are equal. As the core is displaced, the relative inductance of the two windings changes producing a complimentary change in VA and VB. | ||||||||||||||||||||
| Conventional LVDT | ||||||||||||||||||||
| Conventional LVDT When the core is in a central position, the coupling from the primary (V^) to each secondary is equal, so VA=VB and the output V0UT= 0. As the core is displaced VA differs from VB, and the output V0UT changes in magnitude and phase in proportion to the movement. Solartron Half Bridge and LVDT transducers Solartron Metrology's continuous development of precision bobbin mouldings and multi chambered coil windings ensure excellent linearity and thermal stability throughout the range. | ||||||||||||||||||||
| Solartron half bridge and LVDT transducers | ||||||||||||||||||||
| Linearity | ||||||||||||||||||||
| Solartron Orbit digital transducers Solartron Metrology digital transducers are calibrated using a traceable interferometer and are issued with a calibration certificate. All digital transducers are fitted with integrated electronics, which store information such as probe ID, range, calibration error, etc. Digital transducers provide superior performance compared to traditional analogue transducers. Performance figures quoted in this catalogue include all mechanical errors within the probe head together with any errors in the electronics interface modules. | ||||||||||||||||||||