Книга: Wafaa Abd. El-Basit «Design of a Novel System to Automatically Sense Physical Quantities»
|
Производитель: "LAP Lambert Academic Publishing" 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... ISBN:9783659495830 Издательство: "LAP Lambert Academic Publishing" (2013)
ISBN: 9783659495830 |
См. также в других словарях:
physical science, principles of — Introduction the procedures and concepts employed by those who study the inorganic world. physical science, like all the natural sciences, is concerned with describing and relating to one another those experiences of the surrounding… … Universalium
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
Nobel Prizes — ▪ 2009 Introduction Prize for Peace The 2008 Nobel Prize for Peace was awarded to Martti Ahtisaari, former president (1994–2000) of Finland, for his work over more than 30 years in settling international disputes, many involving ethnic,… … Universalium
mathematics — /math euh mat iks/, n. 1. (used with a sing. v.) the systematic treatment of magnitude, relationships between figures and forms, and relations between quantities expressed symbolically. 2. (used with a sing. or pl. v.) mathematical procedures,… … Universalium
Self-reconfiguring modular robot — Modular self reconfiguring robotic systems or self reconfigurable modular robots are autonomous kinematic machines with variable morphology. Beyond conventional actuation, sensing and control typically found in fixed morphology robots, self… … Wikipedia
United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… … Universalium
