Data Acquisition



A sensor is often defined as a “device that receives and responds to a signal or stimulus.” This definition is broad. In fact, it is so broad that it covers almost everything from a human eye to a trigger in a pistol. Consider the level-control system shown in Fig. 1.1 [1]. The operator adjusts the level of fluid in the tank by manipulating its valve. Variations in the inlet flow rate, temperature changes (these would alter the fluid’s viscosity and consequently the flow rate through the valve), and similar disturbances must be compensated for by the operator. Without control, the tank is likely to flood, or run dry.


Adaptive Cruise Control Direct Sensor Inlet Flow Rate Passive Sensor Customary System 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Thompson S (1989) Control systems: engineering and design. Longman Scientific & Technical, Essex, EnglandGoogle Scholar
  2. 2.
    Norton HN (1989) Handbook of transducers. Prentice Hall, Englewood Cliffs, NJGoogle Scholar
  3. 3.
    White RW (1991) A sensor classification scheme. In: Microsensors. IEEE Press, New York, pp 3–5Google Scholar
  4. 4.
    Thompson A, Taylor BN (2008) Guide for the use of the international system of units (SI). NIST Special Publication 811, National Institute of Standards and Technology, Gaithersburg, MD 20899Google Scholar

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.San DiegoUSA

Personalised recommendations