Proximity switch что это

Proximity switches Circuit Diagram Operation

A proximity switch is one detecting the proximity (closeness) of some object. By definition, these switches are non-contact sensors, using magnetic, electric, or optical means to sense the proximity of objects.

A proximity switch will be in its “normal” status when it is distant from any detectable object.

Being non-contact in nature, proximity switches are often used instead of direct-contact limit switches for the same purpose of detecting the position of a machine part, with the advantage of never wearing out over time due to repeated physical contact.

Most proximity switches are active in design. That is, they incorporate a powered electronic circuit to sense the proximity of an object. Inductive proximity switches sense the presence of metallic objects through the use of a high-frequency magnetic field. Capacitive proximity switches sense the presence of non-metallic objects through the use of a high-frequency electric field. Optical proximity switches detect the interruption of a light beam by an object. Ultrasonic proximity switches sense the presence of dense matter by the reflection of sound waves.

Proximity Switch Symbol

The schematic diagram symbol for a proximity switch with mechanical contacts is the same as for a mechanical limit switch, except the switch symbol is enclosed by a diamond shape, indicating a powered (active) device:

Many proximity switches, though, do not provide “dry contact” outputs. Instead, their output elements are transistors configured either to source current or sink current. The terms “sourcing” and “sinking” are best understood by visualizing electric current in the direction of conventional flow rather than electron flow.

The following schematic diagrams contrast the two modes of switch operation, using red arrows to show the direction of current (conventional flow notation). In both examples, the load being driven by each proximity switch is a light-emitting diode (LED):

Principle of Operation:

Proximity Switch consists a sensor circuit and a driver circuit. The sensor circuit purpose is used to detect any near by objects. The sensor circuit sends an output High signal to the transistor based driver circuit when any object found near to the sensor circuit. The transistor based driver circuit may use NPN or PNP transistors and it depends on the application we use.

When a signal received from the sensor circuit, the transistor will be turned ON and the output will be ON. When the object is moved away from sensor circuit, the sensor output is OFF so transistor is OFF and the output will be OFF.

Note: The sensor circuit may contain a LC Resonant oscillator or a mutual induction based circuit. The LC Resonant oscillator generates a designed resonant oscillations continuously. whenever there is any metal object nearby to the sensors, the oscillations may vary and it depends on the object properties. This change in oscillations will be detected and generates an output either High or Low, nothing but object found or not.

Proximity Switch NPN Type

Note: The Red dot in the animation indicated the flow of current path.

Proximity Switch PNP Type

A common coloring convention for electronic proximity switches is brown for +V power supply, blue for ground (− pole of power supply), and black for the switched output signal. This convention is common to sinking and sourcing proximity switches alike.

An electronic switch designed to sink current through its signal wire is alternatively referred to as an NPN switch due to the type of transistor used in its output. Conversely, an electronic switch designed to source current through its signal wire may be referred to as a PNP switch.

The key to understanding these labels is to recognize the emitter terminal of the output transistor is always the one connected to the power supply rail. For a sinking switch, this means the emitter must connect to the negative rail, necessitating an NPN transistor to do the switching. For a sourcing switch, this means the emitter must connect to the positive rail, in which case only a PNP transistor will suffice.

Источник

proximity switch

Смотреть что такое «proximity switch» в других словарях:

Proximity detector — Proximity detectors are devices that use mutual capacitance between itself and a nearby human body in order to detect a person s presence. OverviewThe human body is a great capacitor (body capacitance), and the proximity detector s capacitance… … Wikipedia

Proximity sensor — A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic or electrostatic field, or a beam of electromagnetic radiation (infrared, for instance),… … Wikipedia

Switch — For other uses, see Switch (disambiguation). Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle… … Wikipedia

Reed switch — Reed relay and reed switches Showing the contacts clearly The … Wikipedia

Touch switch — A touch switch is a type of switch that only has to be touched by an object of greater capacitance to operate. It is used in many lamps and wall switches that have a metal exterior as well as on public computer terminals.A touchscreen includes an … Wikipedia

Magnetic proximity fuze — A Magnetic proximity fuze was patented by P.J. Eliomarkakis, (United States Patent US2434551 of January 13, 1948) [1] although similar devices had been in service for nearly a decade. It is a type of proximity fuze that initiates a detonator in a … Wikipedia

Abkürzungen/Luftfahrt/L–R — Dies ist der vierte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E–K … Deutsch Wikipedia

бесконтактный конечный выключатель — — [Я.Н.Лугинский, М.С.Фези Жилинская, Ю.С.Кабиров. Англо русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.] Тематики электротехника, основные понятия EN proximity switchproximity limit switch … Справочник технического переводчика

Pyrometer — An optical pyrometer A sailor checking the temperature of a ventilation s … Wikipedia

Dr Lektroluv — Dr. Lektroluv Birth name Stefaan Vandenberghe Also known as Stefaan, Subsurf, T Quest Origin Belgium Genres Electro Occupations … Wikipedia

Dr. Lektroluv — est le nom de scène de Stefaan Vandenberghe, DJ belge originaire de Gand en Flandre Orientale. Il s’est forgé un personnage imaginaire en se déguisant en smoking et en portant un masque vert durant ses sets, c’est pourquoi certains l’appellent… … Wikipédia en Français

Источник

proximity limit switch

бесконтактный конечный выключатель
—
[Я.Н.Лугинский, М.С.Фези-Жилинская, Ю.С.Кабиров. Англо-русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.]

Тематики

Смотреть что такое «proximity limit switch» в других словарях:

Switch — For other uses, see Switch (disambiguation). Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle… … Wikipedia

бесконтактный конечный выключатель — — [Я.Н.Лугинский, М.С.Фези Жилинская, Ю.С.Кабиров. Англо русский словарь по электротехнике и электроэнергетике, Москва, 1999 г.] Тематики электротехника, основные понятия EN proximity switchproximity limit switch … Справочник технического переводчика

Abkürzungen/Luftfahrt — Dies ist der erste Teil einer Liste der Abkürzungen und Akronyme, wie sie in der Luftfahrt und Militärluftfahrt verwendet werden. Liste der Abkürzungen Teil 1 A A (AA; AB; AC; AD; AE; AF; AG; AH; AI; AK; AL; AM; AN; AO; AP; AQ; AR … Deutsch Wikipedia

Life Sciences — ▪ 2009 Introduction Zoology In 2008 several zoological studies provided new insights into how species life history traits (such as the timing of reproduction or the length of life of adult individuals) are derived in part as responses to… … Universalium

Abkürzungen/Luftfahrt/L–R — Dies ist der vierte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E–K … Deutsch Wikipedia

Saspo — Dies ist der fünfte Teil der Liste Abkürzungen/Luftfahrt. Liste der Abkürzungen Teil 1 A A Teil 2 B–D B; C; D Teil 3 E–K … Deutsch Wikipedia

France — /frans, frahns/; Fr. /frddahonns/, n. 1. Anatole /ann nann tawl /, (Jacques Anatole Thibault), 1844 1924, French novelist and essayist: Nobel prize 1921. 2. a republic in W Europe. 58,470,421; 212,736 sq. mi. (550,985 sq. km). Cap.: Paris. 3.… … Universalium

environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… … Universalium

iPhone — This article is about the line of smartphones by Apple. For other uses, see iPhone (disambiguation). The iPhone 4S, the most recent generation of the iPhone iPhone models … Wikipedia

international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… … Universalium

India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… … Universalium

Источник

[Инструкции] Калибруем датчик приближения на Xiaomi

У многих наблюдается проблема с датчиком приближения!
Решил написать инструкцию как его откалибровать,на примере последней еженедельной прошивки MiRoom(9.7.11)!
Смартфон Redmi Note 5!

1.Заходим в настройки
2.Устройство

avatar.png (43.9 KB, Downloads: 0)

2019-07-28 22:03:53 Upload

avatar.png (50.05 KB, Downloads: 0)

2019-07-28 22:05:22 Upload

4.Тапаем пять раз по пункту «Ядро» и попадаем в инженерное меню!
Также в инженерное меню можно попасть набрав код *#*#6484#*#* в стандартном приложении «Телефон»

avatar.png (57.86 KB, Downloads: 0)

2019-07-28 22:07:11 Upload

5.В инженерном меню выбираем 15 пункт «Proximity sensor test»

avatar.png (55.15 KB, Downloads: 0)

2019-07-28 22:09:44 Upload

5. Попадаем в меню калибровки датчика

avatar.png (23.49 KB, Downloads: 0)

2019-07-28 22:13:09 Upload

Начинаем непосредственно саму калибровку датчика!

При первом заходе в пункт «Proximity sensor»,все кнопки будут не активны.

— Приложите и уберите ладонь в районе фронтальной камеры.Кнопка Calibration станет активной.
— Нажимаем на неё!
— Снова прикладываем ладонь.Кнопка «Test» станет активной.
— Продолжая держать ладонь,нажимаем на неё (кнопка test) и видим сообщение об удачном прохождении теста «Calibration Pass».

Xiaomi Comm APP

Получайте новости о Mi продукции и MIUI

Рекомендации

* Рекомендуется загружать изображения для обложки с разрешением 720*312

Изменения необратимы после отправки

Cookies Preference Center

We use cookies on this website. To learn in detail about how we use cookies, please read our full Cookies Notice. To reject all non-essential cookies simply click «Save and Close» below. To accept or reject cookies by category please simply click on the tabs to the left. You can revisit and change your settings at any time. read more

These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services such as setting your privacy preferences, logging in or filling in formsYou can set your browser to block or alert you about these cookies, but some parts of thesite will not then work. These cookies do not store any personally identifiable information.

These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services such as setting your privacy preferences, logging in or filling in formsYou can set your browser to block or alert you about these cookies, but some parts of thesite will not then work. These cookies do not store any personally identifiable information.

These cookies are necessary for the website to function and cannot be switched off in our systems. They are usually only set in response to actions made by you which amount to a request for services such as setting your privacy preferences, logging in or filling in formsYou can set your browser to block or alert you about these cookies, but some parts of thesite will not then work. These cookies do not store any personally identifiable information.

Источник

INDUCTIVE PROXIMITY SWITCH

1 INDUCTIVE PROXIMITY SWITCH

См. также в других словарях:

Proximity sensor — A proximity sensor is a sensor able to detect the presence of nearby objects without any physical contact. A proximity sensor often emits an electromagnetic or electrostatic field, or a beam of electromagnetic radiation (infrared, for instance),… … Wikipedia

Switch — For other uses, see Switch (disambiguation). Electrical switches. Top, left to right: circuit breaker, mercury switch, wafer switch, DIP switch, surface mount switch, reed switch. Bottom, left to right: wall switch (U.S. style), miniature toggle… … Wikipedia

Electromagnetic compatibility — (EMC) is the branch of electrical sciences which studies the unintentional generation, propagation and reception of electromagnetic energy with reference to the unwanted effects (Electromagnetic Interference, or EMI) that such energy may induce.… … Wikipedia

Transformer — This article is about the electrical device. For the toy line franchise, see Transformers. For other uses, see Transformer (disambiguation). Pole mounted distribution transformer with center tapped secondary winding. This type of transformer is… … Wikipedia

thought — thought1 /thawt/, n. 1. the product of mental activity; that which one thinks: a body of thought. 2. a single act or product of thinking; idea or notion: to collect one s thoughts. 3. the act or process of thinking; mental activity: Thought as… … Universalium

MOSFET — Two power MOSFETs in the surface mount package D2PAK. Operating as switches, each of these components can sustain a blocking voltage of 120 volts in the OFF state, and can conduct a continuous current of 30 amperes in the ON state, dissipating up … Wikipedia

Fluorescent lamp — A fluorescent lamp or fluorescent tube is a gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that then causes a phosphor to fluoresce, producing visible light.Unlike… … Wikipedia

railroad — /rayl rohd /, n. 1. a permanent road laid with rails, commonly in one or more pairs of continuous lines forming a track or tracks, on which locomotives and cars are run for the transportation of passengers, freight, and mail. 2. an entire system… … Universalium

List of sensors — * Accelerometer * Touch sensor * Active pixel sensor * Air flow meter * Alarm sensor * Bedwetting alarm * Bhangmeter * Biochip * Biosensor * Breathalyzer * Capacitance probe * Carbon paste electrode * Carbon monoxide detector * Catadioptric… … Wikipedia

Integrated circuit — Silicon chip redirects here. For the electronics magazine, see Silicon Chip. Integrated circuit from an EPROM memory microchip showing the memory blocks, the supporting circuitry and the fine silver wires which connect the integrated circuit die… … Wikipedia

Источник