Single Channel Data Acquisition System: A Single Channel Data Acquisition System consists of a signal conditioner followed by an analog to digital (A/D) converter, performing repetitive conversions at a free running, internally determined rate. The outputs are in digital code words including over range indication, polarity information and a status output to indicate when the […]
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Electric Drive Motor: Motion control is required in large number of industrial and domestic applications like transportation systems, rolling mills, paper machines, textile mills, machine tools, fans, pumps, robots, washing machines etc. Systems employed for motion control are called drives and may employ any of the prime movers such as, diesel or petrol. engines, gas
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A Simple Electric Motor: Variable speed drives in the industry employ a simple electric motor as their drive motors mainly because they enjoy several specific advantages, such as overload capacity, smooth speed control over a wide range, capability of operating in all the four quadrants of the speed-torque plane, etc. Till the advent of thyristors
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Frequency Domain Representation: Frequency Domain Representation – A very important representation of discrete time systems can be obtained in terms of sinusoidal or complex-exponential signals. This is possible because the linear shift invariant systems have the interesting property that the response to a sinusoidal or complex exponential input is also sinusoidal or complex-exponential, having the
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Signal Conditioning System: Signal Conditioning System – The measurand, which is basically a physical quantity, is detected by the first stage of the instrumentation or measurement system. The first stage is the detector transducer stage. The quantity is detected and converted or transduced into an electrical form in most cases. The output of the first
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Measurements of Thickness using Beta Gauge: Beta Gauge – A common and characteristic feature of a radioactive element is that they disintegrate spontaneously to produce fresh radioactive elements called daughter elements. This activity of parent elements is termed as radioactivity. During this disintegration, high energy radiations are emitted from the nuclear of the radioactive element.
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Pressure Inductive Transducer: Pressure Inductive Transducer – A simple, arrangement, wherein a change in the inductance of a sensing element is produced by a pressure change, is given in Fig. 13.22. Here the pressure acting on a movable magnetic core causes an increase in the coil inductance corresponding to the acting pressure. The change in
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Resistive Transducer | Resistive Potentiometer | Resistance Pressure Transducer: Resistive Transducer are those in which the resistance changes due to a change in some physical phenomenon. The change in the value of the resistance with a change in the length of the conductor can be used to measure displacement. Strain gauges work on the principle
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Digital Data Recording System: Digital Data Recording – Digital magnetic tapes are often used as storage devices in digital data processing applications. Digital tape units are of two types, incremental and synchronous. Incremental digital recorders are commanded to step ahead (increment) for each digital character to be recorded. Input data may be at a relatively
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XY Recorder Working: XY Recorder Working – In most research fields, it is often convenient to plot the instantaneous relationship between two variables [Y = f(x)], rather than to plot each variable separately as a function of time. In such cases, the X-Y recorder is used, in which one variable is plotted against another variable.
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