Transcription of CHAPTER 3: SENSORS
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CHAPTER 3: SENSORS
CHAPTER 3: SENSORS . SECTION : POSITIONAL SENSORS LINEAR VARIABLE DIFFERENTIAL TRANSFORMERS (LVDT) hall effect MAGNETIC SENSORS RESOLVERS AND SYNCHROS INDUCTOSYNS ACCELEROMETERS iMEMS ANGULAR-RATE-SENSING GYROSCOPE GYROSCOPE DESCRIPTION CORIOLIS ACCELEROMETERS MOTION IN 2 DIMENSIONS CAPACITIVE SENSINGS IMMUNITY TO SHOCK AND VIBRATION REFERENCES SECTION : TEMPERATURE SENSORS INTRODUCTION SEMICONDUCTOR TEMPERATURE SENSORS CURRENT OUT TEMPERATURE SENSORS CURRENT AND VOLTAGE OUTPUT TEMPERATURE SENSORS THERMOCOUPLE PRINCIPLES AND COLD-JUNCTION. COMPENSATION AUTO-ZERO AMPLIFIER FOR THERMOCOUPLE. MEASUREMENTS RESISTANCE TEMPERATURE DETECTORS (RTDs) THERMISTORS DIGITAL OUTPUT TEMPERATURE SENSORS THERMOSTATIC SWITCHES AND SET-POINT CONTROLLERS MICROPROCESSOR TEMPERATURE MONITORING REFERENCES SECTION : CHARGE COUPLED DEVICES (CCDs) REFERENCES SECTION : BRIDGE CIRCUITS INTRODUCTION AMPLIFING AND LINEARIZING BRIDGE OUTPUTS 3,75.
Figure 3.7: Hall Effect Sensor The Hall effect may be used to measure magnetic fields (and hence in contact-free current measurement), but its commonest application is in motion sensors where a fixed Hall sensor and a small magnet attached to a moving part can replace a cam and contacts with a great improvement in reliability.
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