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Metal detector (3029 bytes)
1: ...''' use [[electromagnetic induction]] to detect [[metal]]. 3: ...Alexander Graham Bell]] constructed a crude metal detector in an attempt to find an assassin's bullet in Pre... 5: ... detectors are used by treasure hunters to locate metallic items, such as jewelry or coins, buried shallo... 7: There are three types of metal detectors: beat frequency oscillator, induction balance, a... 8: ... frequency, and audible beats between them signal metal. Detector (1022 bytes) 1: In [[telecommunication]], the term '''detector''' has the following meanings: 13: ...n experimental [[particle physics]], a [[particle detector]] is a device used to track and identify elementa... Error detector (1463 bytes) 1: ... error is not present. In simplest form, an error detector will produce a 0 when its input is correct, and a... 3: The error detector may detect inconsistencies in redundant informati... 5: The error detector may compare incoming signals against internally p... 7: ...andling]] program to run. The output of the error detector may be captured in a [[latch]] for readout by the... 9: ... correction]] circuits often incorporate an error detector as well. Phase detector (211 bytes) 1: A '''phase detector''' is a circuit or instrument that detects the di... Bat detector (1850 bytes) 1: ...rs and self-built. There are several types of bat detectors: 3: == Bat detector types == 5: === Frequency division detectors === 7: Frequency division detectors work by [[division|dividing]] the frequency of u... 9: === Heterodyne detectors === Bullshit Detector (1590 bytes) 2: ... to the band. The sound quality of the ''Bullshit Detector'' series was mixed, and was often very basic or p... 6: - Sleeve notes from ''Bullshit Detector Volume 3'' 8: ... good writer is a built-in, shock-proof, bullshit detector." 10: A fourth ''Bullshit Detector'', this time an international compilation, was re... Smoke detector (3296 bytes) 1: ...JPG|thumb|200px|Residential ceiling-mounted smoke detector]] 3: ...rby people to the danger of [[fire]]. Most smoke detectors work either by optical detection or by ionizatio... 9: ==Optical detector== 10: ...bsence of smoke, the light passes in front of the detector but does not fall on it. When visible smoke ente... 12: ==Ionization detector== Semiconductor detector (1101 bytes) 1: ...s, these detectors are usually known as ''silicon detectors.'' 3: ...r [[wire chambers]]. The drawback is that silicon detectors are much more expensive than these older technol... 5: [[Category:Particle detectors]] Product detector (3203 bytes) 1: ...veform like an [[envelope detector]], the product detector takes the product of the modulated signal and a l... 3: ...or block in a [[superheterodyne receiver]], and a detector designed for RF can be combined with an RF amplif... 5: == A simple product detector == 7: The simplest form of product detector multiplies an incoming signal by its carrier to p... 9: === Mathematical model of the simple product detector === Envelope detector (2216 bytes) 1: An '''envelope detector''' is a device which is used to [[demodulate]] AM... 11: == Diode Detector == 12: ...s the '''diode detector'''. To construct a diode detector, simply connect a [[diode]] between the input and... 14: == Precision detector == 15: An envelope detector can also be constructed to use a '''precision rec... ALEPH detector (153 bytes) 1: ...us for LEP Physics at CERN)''' is one of the four detectors of the [[LEP]] collider 5: [[Category:Particle detectors]] Balance detector (113 bytes) 1: ... '''balance detector''' consists of several photo-detectors which can eliminate unwanted noise output. Radar detector (643 bytes) 1: ...aser light rather than radio waves; modern "radar detectors" have been adapated to suit that technology. 7: ...-detector.htm Howstuffworks.com article] on radar detectors Particle detector (2870 bytes) 1: .... The notion [[counter]] is often used instead of detector. 3: ==Types of detectors== 5: Modern particle detectors are constructed from several of these types, 7: ...h type forms a subsystem of the complete particle detector. 15: * [[Cherenkov detector]],[[Aerogel detector]] Cherenkov detector (333 bytes) 1: ...enkov) detector is a [[particle detector|particle detector]] utilizing the mass-dependent threshold energy o... Time of flight detector (843 bytes) 1: A time of flight detector is a [[particle detector]] which can discriminate between a lighter and a ... Threshold detector with hysteresis (1461 bytes) 1: [[image:threshold_detector_with_hysteresis.jpg|200px|thumb|right|Circuit Dia... 3: ...th on Vin and the output voltage of the threshold detector itself, both multiplied by a resistor ratio. 7: ...e of R1, the magnitude of Vin that will cause the detector to switch can be increased or decreased. This pro... Chubb detector lock (388 bytes) 1: A '''Chubb detector lock''' is a type of [[lever tumbler lock]] that ... Polish mine detector (1607 bytes) 1: ...r (''Mk. II'', Mk. III and ''Mk IV''). The ''Mine detector (Polish) Mk. III'' was used by the British Army u... 5: ...unds and could be operated by one man. The Polish detector saw service throughout the war and the Mark 4c ve... 10: *http://www.eurofresh.se/detector.html 11: *http://www.12pulkulanow.com/main_folder/Mine%20Detector.htm Zero crossing threshold detector (790 bytes) 1: [[image:zero_crossing_detector.jpg|200px|thumb|right|Circuit Diagram]] 2: A '''zero crossing threshold detector''' is an [[electronic]] [[circuit]] that consists...
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:: About Us This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "metal detector". |