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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 on theme: "EE 4BD4 Lecture 14 Position Sensors 1. Types of Sensors Potentiometers and linear resistors Capacitive sensors (mm distances, e.g. capacitive microphone)"— Presentation transcript:

1 EE 4BD4 Lecture 14 Position Sensors 1

2 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

3 3

4 4

5 5

6 6

7 Basic Approach (not direction sensitive) 7

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

9 Alternate Processing Approach 9

10 AD598 Signal Conditioner (Simplified) 10

11 Hall Effect Voltage V H 11

12 12

13 13

14 Analog Devices Magnetic Field Sensor (Linear output) 14

15 15

16 Setting Gain of the Chip 16

17 17

18 18

19 19

20 20

21 21

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