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Describe common methods for converting a physical parameter into an electrical quantity and give examples of transducers, including those for measurement of temperature, strain, motion, position and light. Explain how to make sensitive measurements using a Wheatstone bridge, including balancing and offset compensation.
Data are collected from an object by a number of sensors. Some of them (2, 3, and 4) are positioned directly on or inside the object. Sensor 1 perceives the object without a physical contact and, therefore, is called a noncontact sensor. An example of such a sensor is a radiation detector and a TV camera.
Definitions: Transducer and sensors. Transducer. a device that converts a primary form of energy into a corresponding signal with a different energy form Primary Energy Forms: mechanical, thermal, electromagnetic, optical, chemical, etc. Sensor (e.g., thermometer) is a device that detects a change.
INTRODUCTION TO TRANSDUCERS AND SENSORS. Structure. 1.1 Introduction. Objectives. 1.2 Active and Passive Sensors. 1.3 Basic Requirements of a Sensor/Transducer. 1.4 Discrete Event Sensors. 1.4.1 Mechanical Limit Switches. 1.4.2 Proximity Limit Sensors. 1.4.3 Photoelectric Sensors. 1.4.4 Fluid Flow Switch. 1.5 Continuous Sensor.
A terminology distinction is to use sensor for the actual sensing element and transducer for the sensing element plus any associated circuitry. All transducers would thus contain a sensor and most sensors would also be transducers. Electromechanical output devices are generically called actuators.
Measurement system comprises of sensors, transducers and signal processing devices. Today a wide variety of these elements and devices are available in the market. For a mechatronics system designer it is quite difficult to choose suitable sensors/transducers for the desired application(s).
Transducers and sensors. All instruments based on measuring signals. therefore need to understand the types of signals properties and characteristics of transducers applications which are appropriate impact on the instrument systems. Transducer.
