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A guide to inductive sensing

A GUIDE TO INDUCTIVE SENSING HOW TO BUILD AN INDUCTIVE SENSOR WITH AN INDUCTANCE-TO-DIGITAL CONVERTER (LDC) Inductance-to-Digital Converter WHY USE AN LDC? HIGHER RESOLUTION INCREASED RELIABILITY GREATER FLEXIBILITY Enables sub-micron resolution in Offers contactless sensing that is Allows the sensor to be located position-sensing applications with 16-bit resonance impedance and remotely from the electronics, where PCBS cannot be placed. immune to nonconductive contaminants, such as oil, dirt and dust, which can shorten equipment life. 24-bit inductance values. LOWER SYSTEM COST LIMITLESS POSSIBILITIES Uses low-cost sensors and targets Supports pressed foil or conductive ink targets, offering endless opportunities for creative and innovative system designs. and does not require magnets. | HOW CAN YOU USE AN LDC? LDCS can be used to measure the position, motion, or composition of a metal or conductive target, as well as to detect the compression, extension, or twist of a spring. Uses within automotive, white goods, consumer electronics, industrial and medical are wide-ranging and seemingly endless. Axial position sensing Inductance-to- Digital Converter LDC Position Lateral position sensing Lateral position sensing with z-axis insensitivity Inductance-to- Inductance-to- Digital Converter Digital Converter LDC LDC Position (X2) Position Partial rotation sensing Full rotation sensing with z-axis insensitivity Output 3 Output 1 Output 2 Inductance-to- Digital Converter Inductance-to- Digital Converter LDC LDC 180 360 540 720 900 1080 (X3) 0 90 180 270 360 450 540 630 720 Angle (deg) Angle Gear-tooth counting - perpendicular to coil Gear-tooth motion - parallel to coil Inductance-to- Inductance-to- Digital Converter Digital Converter LDC LDC Gear Count Gear Count Compression, extension, and twist using a spring as a sensor Metal composition identification Inductance-to- Digital Converter Inductance-to- Digital Converter LDC LDC In 1820, Johann Schweigger invented the galvanometer - the first instrument used to detect | Global sensor According to Popular Science, a crash test dummy has nearly 200 sensors to gather 70,000 data points demand expected to reach USD$11.5 billion by 2017 - and measure electric 9.3% CAGR from currents and what many per second. 2012. (source: IHS) credit as the world's first sensor. Learn more about LDCS at www.ti.com/Idc-info TEXAS INSTRUMENTS LDC Output LDC Output LDC Output LDC Output LDC Output LDC Output

A guide to inductive sensing

shared by vnsmithee on Sep 18
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This visual guide to inductive sensing shows how the inductance-to-digital converter (LDC) is providing electrical and mechanical engineers with an entirely new approach to inductive sensing. LDCs ca...

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