ЧТО ОЗНАЧАЕТ СЛОВО COHERER
Когерер
Когерер представляет собой примитивную форму детектора радиосигнала, используемую в первых радиоприемниках в эпоху беспроводной телеграфии в начале 20-го века. Изобретенный в 1884 году итальянским физиком Temistocle Calzecchi-Onesti, он состоит из трубки или капсулы, содержащей два электрода, расположенных на небольшом расстоянии друг от друга, с металлическими пропилами в пространстве между ними. Когда к устройству подается радиочастотный сигнал, начальное высокое сопротивление заявок уменьшается, что позволяет через него пропускать электрический ток. Когерер был ключевой технологией для радиосвязи и был первым устройством, используемым для обнаружения радиосигналов в практической беспроволочной телеграфной трансмиссии с искровым разрядником. Начиная с 1890 года другие исследования проводились Оливером Лодж, Александром Поповым, Эдуардом Бранли, а Гульельмо Маркони использовал его в первых исторических экспериментах по радиосвязи, и он стал основой для радиоприема и оставался широко распространенным до 1910 года. Он был заменен более чувствительными электролитическими и кристаллическими детекторами и стал устаревшим, хотя в 1950-х годах когерьер был кратко использован, по крайней мере, в одной радиоуправляемой игрушке.
Значение слова coherer в словаре английский языка
Определение когелера в словаре - это электрический компонент, ранее используемый для обнаружения радиоволн, состоящий из трубки, содержащей свободно упакованные металлические частицы. Волны заставляли частицы соединяться, тем самым изменяя ток через контур.
КНИГИ НА АНГЛИЙСКИЙ ЯЗЫКЕ, ИМЕЮЩЕЕ ОТНОШЕНИЕ К СЛОВУ «COHERER»
Поиск случаев использования слова
coherer в следующих библиографических источниках. Книги, относящиеся к слову
coherer, и краткие выдержки из этих книг для получения представления о контексте использования этого слова в литературе на английский языке.
How. to. Make. a. Wireless. Telegraph. Set. —. Part. VI. By ARTHUR MOORE
Construction of a Coherer and a Detector (To be continued.) Wood- Working for
Beginners By IRA S. Either the coherer or a detector may be used in the receiving
" ...
The chief feature of the receiving station (Fig. 2) of a wireless telegraph outfit is
the coherer. This simple piece of apparatus is the thing which detects the
presence of the electrical waves transmitted through space and received by the
aerials.
3
Modern Communications Receiver Design and Technology
Iron or nickel silver particles Glass envelope Silver electrodes Figure 2.1 The
coherer was invented by Edouard Branly in 1891. 2.3 The Decoherer (Practical
Coherer/Decoherer Receivers) The decoherer was nothing more than an
electrical ...
4
Wireless: From Marconi's Black-box to the Audion
As was noted in chapter 1, Lodge also constructed a spring point-contact detector
, which he called a coherer. Lodge therefore had two new detectors: his coherer
and Branly's tube. (Initially, Lodge called only his single-point detector a coherer
...
5
The Worldwide History of Telecommunications
In 1891 he rediscovered the cohesion effect on small particles under the
influence of electricity.3 Based on this effect he constructed a device, later called
a coherer, for detecting electromagnetic waves, consisting basically of a tube
filled with ...
6
Array and Phased Array Antenna Basics
He constructed an electrical circuit that contained an arrow-shaped zinc plate, a
battery, a coherer and a bell [4]. The circuit might have looked like the one shown
in figure 2.12a.12 I a b c I a b c Fig. 2.12 Marconi's lightning detecting apparatus.
A relatively simple method for automatic tapping-back had been suggested much
earlier by Lodge in conjunction with his original metal spherical knob coherer.
Lodge had positioned the electric bell he used to announce the detection of a ...
The coherer was a primitive form of radio signal detector used in the late nineteenth and early twentieth centuries, consisting of a capsule of metal filings in the space between two electrodes.
Frederic P. Miller, Agnes F. Vandome, John McBrewster,
2009
9
The Ultimate Book of Saturday Science: The Very Best ...
or the beeper goes off when you temporarily short circuit the two ends of the
coherer. Things to Try If you have a single-spark piezoelectric igniter, why not try
that? It probably won't work quite as well, but it does offer the opportunity to see
how ...
10
The Design of CMOS Radio-Frequency Integrated Circuits
Branly's coherer. Relay/ Paper Tape Inker (Assumed to have high RF impedance
) FIGURE 1.2. Typical receiver with coherer. packed, perhaps slightly oxidized,
metallic powder whose resistance turned out to have interesting hysteretic ...
НОВОСТИ, В КОТОРЫХ ВСТРЕЧАЕТСЯ ТЕРМИН «COHERER»
Здесь показано, как национальная и международная пресса использует термин
coherer в контексте приведенных ниже новостных статей.
The light and the sea
It was while studying the polarisation of microwaves through living tissue that JC Bose was compelled to invent his wireless coherer in the ... «Hindu Business Line, Мар 15»
ZS90SARL makes its debut on January 1, 2015
... technician in the city who through experimentation to improve the performance of the telephone mouth piece detected its coherer properties. «Southgate Amateur Radio Club, Дек 14»
Today in Media History: In the late 1890s Marconi helped invent …
He set up a specially designed wireless receiver in Newfoundland, Canada, using a coherer (a glass tube filled with iron filings) to conduct ... «Poynter.org, Дек 14»
Who's Left?
Not only that, but I learned what a SWARD and a COHERER are today, and you know what? It didn't hurt a bit. Clue of the Day goes to ... «New York Times, Окт 13»
The Weird and Wonderful World of Retro-Death-Telegraphy
Exploration of the pre-cursors of digital technologies uncovered devices such as the coherer, a primitive radio receiver made with two ... «Huffington Post Canada, Июн 13»
The Memristor's Fundamental Secrets Revealed
“Our arXiv paper talks about the coherer, which comprises an imperfect metal-metal contact in embodiments such as a point contact between ... «IEEE Spectrum, Июн 13»
The crescograph and the scifi writing genius who invented it
He invented a version of the “coherer,” a detecting device for radio waves. He demonstrated it in 1895, by sending out radio waves to a device ... «io9, Мар 13»
Fanatical Devotion: Where Have All the Passionate Artists Gone?
“He turned from the Virgin to the Dynamo as though he were a Branly coherer. On one side, at the Louvre and at Chartres, as he knew by the record of work ... «Big Think, Янв 11»
Gas Mantles and Amateur Radio
The transmitter was spark, using a Ford ignition coil, and the receiver used a coherer, which they said could be purchased from Gamages for ... «Southgate Amateur Radio Club, Ноя 10»
Nikola Tesla: Father of Unmanned Vehicle Technology
Tesla used a “sensitive device” called a coherer, which consisted of a metal oxide powder that was subjected to a magnetic field. A thin metal ... «Assembly Magazine, Апр 10»