EE 4BD4 Lecture 14 Position Sensors 1. Types of Sensors Potentiometers and linear resistors Capacitive sensors (mm distances, e.g. capacitive microphone)

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Presentation transcript:

EE 4BD4 Lecture 14 Position Sensors 1

Types of Sensors Potentiometers and linear resistors Capacitive sensors (mm distances, e.g. capacitive microphone) Linear variable differential transformer (LVDT) Hall Effect sensors Optical encoders Accelerometers 2

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Basic Approach (not direction sensitive) 7

Phase –Sensitive Detector for Direction Excitation signal between 50 Hz and 25kHz (10 times greater than frequency of movement) 8

Alternate Processing Approach 9

AD598 Signal Conditioner (Simplified) 10

Hall Effect Voltage V H 11

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Analog Devices Magnetic Field Sensor (Linear output) 14

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Setting Gain of the Chip 16

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