Design of a Novel System to Automatically Sense Physical Quantities: Sensing Some Physical Quantities Using Nonlinear Resistor Devices - Softcover

Abd. El-Basit, Wafaa

 
9783659495830: Design of a Novel System to Automatically Sense Physical Quantities: Sensing Some Physical Quantities Using Nonlinear Resistor Devices
Softcover
ISBN 10: 3659495832 ISBN 13: 9783659495830
Verlag: LAP Lambert Academic Publishing, 2013

Inhaltsangabe

The goal of this project is to design a resistance to time converter capable of converting resistive change into pulse widths of proportional durations. This converter exhibits a compatibility of wider conversion range with a reasonable level of sensitivity required for industrial applications. The aim of the work is however aimed at to achieve a low-cost and compact transducer based on an inexpensive popular precision timing chip 555 timer for measurement of temperature of an ambience, force, light intensity and relative humidity using nonlinear sensitive resistors (Thermistors with negative temperature coefficient (NTC), Force Dependent Resistor, Light Dependent Resistor and Humidity Dependent Resistor) placed in a 555 timer circuit working in the astable mode. This forms the core of the measurement system which is without doubt cheap as well as compact. The circuit output, after further conditioning, is flow by frequency meter (convert change in frequency to current) which serves as the linearizer. Experimental results are shown to be compared with mathematical derivations, both reporting a good level of response matching very closely with the derived results.

Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.

Reseña del editor

The goal of this project is to design a resistance to time converter capable of converting resistive change into pulse widths of proportional durations. This converter exhibits a compatibility of wider conversion range with a reasonable level of sensitivity required for industrial applications. The aim of the work is however aimed at to achieve a low-cost and compact transducer based on an inexpensive popular precision timing chip 555 timer for measurement of temperature of an ambience, force, light intensity and relative humidity using nonlinear sensitive resistors (Thermistors with negative temperature coefficient (NTC), Force Dependent Resistor, Light Dependent Resistor and Humidity Dependent Resistor) placed in a 555 timer circuit working in the astable mode. This forms the core of the measurement system which is without doubt cheap as well as compact. The circuit output, after further conditioning, is flow by frequency meter (convert change in frequency to current) which serves as the linearizer. Experimental results are shown to be compared with mathematical derivations, both reporting a good level of response matching very closely with the derived results.

„Über diesen Titel“ kann sich auf eine andere Ausgabe dieses Titels beziehen.

Verlag
LAP Lambert Academic Publishing
Erscheinungsdatum
2013
Sprache
Englisch
ISBN 10 
3659495832
ISBN 13 
9783659495830
Einband
Tapa blanda
Anzahl der Seiten
64
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