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Automotive Sensors by John Turner

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CHAPTER 6

AUTOMOTIVE TORQUE SENSORS

John Turner

1. INTRODUCTION

Torque is frequently a cause of confusion, even among experienced engineers. Statements such as “torque is the amount of twist in the shaft” or “torque is a measure of the windup” are often heard. It is sensible therefore to begin with a formal definition of torque, before moving on to consider methods by which it can be measured.

Torque can be defined as a measure of the tendency of a force to rotate the body on which it acts about an axis. Everyday experience tells us that the “rotating effectiveness” of a force increases with its perpendicular distance from the pivot. For example, when opening a door it is sensible to push or pull as far as possible from the hinges, and we attempt ...

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