{"id":553,"date":"2015-09-10T17:19:09","date_gmt":"2015-09-10T15:19:09","guid":{"rendered":"http:\/\/spectraconsulting.it\/infrarosso\/?lang=en"},"modified":"2015-10-01T15:39:17","modified_gmt":"2015-10-01T13:39:17","slug":"infrared","status":"publish","type":"page","link":"https:\/\/spectraconsulting.it\/en\/infrared\/","title":{"rendered":"Infrared"},"content":{"rendered":"

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The term “Infrared” means a portion of the electromagnetic spectrum that lies “beyond the red”, with longer wavelengths then of the color red (in the visible spectrum) and shorter wavelengths than microwave.<\/p>\n

The discovery of infrared (IR) dates back to 1800. Many important discoveries were made in the following decades up to the present day, with infrared detectors fixed on aircrafts and satellites for a continuous scanning of our planet and of the deep Universe.<\/p>\n

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Infrared<\/h1>\n

The discovery of infrared (IR) dates back to 1800 from physicist William Herschel; as a result of experimentation with thermal sunlight through a prism, Herschel noticed that the temperature in the area being not illuminated by visible light, yet in proximity to the red band which was higher compared to that of other areas not illuminated. There was evidence that some specific solar radiation is not visible.<\/p>\n

The light (visible) from solar radiation is an electromagnetic radiation between 0.35 and 0.74 micron. The radiation range with a wavelength between 0.74 and 0.8 micron is called “photographic infrared”, while those with a wavelength greater than 0.8 micron are called “thermal infrared” and are used for “thermal vision”.<\/p>\n

Normally, in the construction field, the sensors are used and calibrated between 7 and 14 micron which allows for an investigation of the temperatures between -40 \u00b0C and +100 \u00b0C with an extreme precision.<\/p>\n

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\"Infrared<\/a>Every object with a temperature above absolute zero (0 Kelvin = -273.15 \u00b0 C ) emits radiation into surrounding space; this radiation can be detected by the camera and converted into electric signal, and from this, into a digital image. It is not necessary, therefore, for the operator to come into close contact with the objects in order to perform the measurements, indeed the emitted infrared radiation is detected, measured and recorded, even through the space of a vacuum. Non-Destructive Testing utilizing the Infrared method is signified in this way.<\/p>\n

Non-Destructive Testing (NDT) signifies tests, exams, and surveys whose methods do not alter the material, and do not require the destruction or removal of samples from the object in question.<\/p>\n

The most commonly used methods are based on the ultrasonic (UT), X- and gamma- ray radiation (RT), vibration, electromagnetic induction (MT), with penetrating liquid (PT); as well as methods such as thermography (TT), endoscopy, strain gauge (ST), the eddy current (ET), visual examination (VT) and so on.<\/p>\n

The tests results, using these methods, are the basis for assessment of a product\u2019s quality, for the examination of component integrity, and for diagnostics and research into the causes of machinery and equipment troubleshooting.<\/p>\n

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The term “Infrared” means a portion of the electromagnetic spectrum that lies “beyond the red”, with longer wavelengths then of the color red (in the visible spectrum) and shorter wavelengths than microwave. The discovery of infrared (IR) dates back to 1800. Many important discoveries were made in the following decades up to the present day, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":30,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"Con il termine \"Infrarosso\" si intende quella porzione dello spettro elettromagnetico che sta \"oltre il rosso\", ovvero quelle lunghezze d'onda maggiori del colore rosso (nel visibile) e minori delle microonde.\r\n\r\nLa luce solare (visibile) \u00e8 una radiazione elettromagnetica compresa tra 0,35 e 0,74 micron. Le radiazioni che hanno lunghezza d'onda compresa fra 0,74 e 0,8 micron vengono dette \u201cinfrarosso fotografico\u201d, mentre quelle che hanno lunghezza d'onda superiore a 0,8 micron vengono dette \u201cinfrarosso termico\u201d e sono usate per la \u201cvisione termica\u201d.\r\n\r\nNormalmente nel campo edile si utilizzano sensori tarati tra i 7 e 14 micron che consentono di indagare le temperature, in un range relativo, tra i -40\u00b0C e i +100\u00b0 C con estrema precisione.\r\n\r\nLa scoperta dell'infrarosso (IR) risale al 1800 ad opera di William Herschel; a seguito di alcuni esperimenti termici con la luce solare attraverso un prisma, Herschel, not\u00f2 che la temperatura nella zona non illuminata dalla luce visibile ma prossima alla banda del rosso era pi\u00f9 alta rispetto alle altre zone non illuminate. Questa era la prova che esistevano delle radiazioni solari non visibili.\r\n\r\nMolte importanti scoperte sono state effettuate nei decenni successivi fino ad arrivare ai giorni nostri, dove i rilevatori (detector) all'infrarosso vengono montati su aerei e satelliti artificiali per la scansione continua del nostro pianeta e del profondo Universo.\r\n\r\nOgni oggetto avente una temperatura superiore allo zero assoluto (0 kelvin= -273,15 C\u00b0 ) emette radiazioni nello spazio circostante; tali radiazioni possono essere captate da una termocamera a raggi infrarossi e trasformate in segnale elettrico, e da questo, in immagine digitale.\r\n\r\nNon serve, pertanto, che per eseguire delle misure, gli oggetti e l'operatore siano in contatto tra loro, la radiazione infrarossa emessa viene captata, misurata e registrata, anche attraverso il vuoto. Si parla, cos\u00ec, di Prove non Distruttive con il metodo Infrarosso. Le Prove non Distruttive (PnD) sono il complesso di prove, esami, e rilievi condotti impiegando metodi che non alterano il materiale e non richiedono la distruzione o l'asportazione di campioni dalla struttura in esame.\r\n\r\nI metodi pi\u00f9 comunemente utilizzati si basano sugli ultrasuoni (UT), sulle radiazioni X e gamma (RT), sulle vibrazioni, sull'induzione elettromagnetica (MT), con i liquidi penetranti (PT), oltre a metodi quali la termografia (TT), l'endoscopia, l'estensimetria (ST), le correnti indotte (ET), l'esame visivo (VT) ecc.\r\n\r\nI risultati delle prove, utilizzando questi metodi, sono alla base di una valutazione di qualit\u00e0 di un prodotto, per l'esame dell'integrit\u00e0 di un componente, per la diagnosi e la ricerca delle cause di malfunzionamenti di macchinari ed apparecchiature.","_et_gb_content_width":"","footnotes":""},"class_list":["post-553","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/pages\/553","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/comments?post=553"}],"version-history":[{"count":14,"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/pages\/553\/revisions"}],"predecessor-version":[{"id":584,"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/pages\/553\/revisions\/584"}],"wp:attachment":[{"href":"https:\/\/spectraconsulting.it\/en\/wp-json\/wp\/v2\/media?parent=553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}