{"id":742,"date":"2020-04-20T11:51:10","date_gmt":"2020-04-20T09:51:10","guid":{"rendered":"https:\/\/lunitek.it\/wpold\/seismic\/?page_id=742"},"modified":"2020-06-04T17:16:26","modified_gmt":"2020-06-04T15:16:26","slug":"aemssion","status":"publish","type":"page","link":"https:\/\/lunitek.it\/wpold\/seismic\/acoustic-emission\/aemssion\/","title":{"rendered":"AEMISSION"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"742\" class=\"elementor elementor-742\">\n\t\t\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-3d286a7c elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d286a7c\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-7495e4cc\" data-id=\"7495e4cc\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-125539ac elementor-arrows-position-outside elementor-pagination-position-outside elementor-invisible elementor-widget elementor-widget-image-carousel\" data-id=\"125539ac\" data-element_type=\"widget\" data-settings=\"{&quot;slides_to_show&quot;:&quot;1&quot;,&quot;pause_on_hover&quot;:&quot;no&quot;,&quot;_animation&quot;:&quot;fadeInDown&quot;,&quot;navigation&quot;:&quot;both&quot;,&quot;autoplay&quot;:&quot;yes&quot;,&quot;pause_on_interaction&quot;:&quot;yes&quot;,&quot;autoplay_speed&quot;:5000,&quot;infinite&quot;:&quot;yes&quot;,&quot;effect&quot;:&quot;slide&quot;,&quot;speed&quot;:500}\" data-widget_type=\"image-carousel.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-image-carousel-wrapper swiper\" dir=\"ltr\">\n\t\t\t<div class=\"elementor-image-carousel swiper-wrapper swiper-image-stretch\" aria-live=\"off\">\n\t\t\t\t\t\t\t\t<div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"1 of 4\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/LUNITEK_ACOUSTIC_EMISSION_SEISMIC_AEMISSION_02.png\" alt=\"LUNITEK ACOUSTIC EMISSION SEISMIC AEMISSION 02\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"2 of 4\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/LUNITEK_ACOUSTIC_EMISSION_SEISMIC_AEMISSION_00.png\" alt=\"LUNITEK ACOUSTIC EMISSION SEISMIC AEMISSION 00\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"3 of 4\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/LUNITEK_ACOUSTIC_EMISSION_SEISMIC_AEMISSION_03.png\" alt=\"LUNITEK ACOUSTIC EMISSION SEISMIC AEMISSION 03\" \/><\/figure><\/div><div class=\"swiper-slide\" role=\"group\" aria-roledescription=\"slide\" aria-label=\"4 of 4\"><figure class=\"swiper-slide-inner\"><img decoding=\"async\" class=\"swiper-slide-image\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/LUNITEK_ACOUSTIC_EMISSION_SEISMIC_AEMISSION_01.png\" alt=\"LUNITEK ACOUSTIC EMISSION SEISMIC AEMISSION 01\" \/><\/figure><\/div>\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-prev\" role=\"button\" tabindex=\"0\">\n\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"eicon-chevron-left\"><\/i>\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"elementor-swiper-button elementor-swiper-button-next\" role=\"button\" tabindex=\"0\">\n\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"eicon-chevron-right\"><\/i>\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"swiper-pagination\"><\/div>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-2299861c elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" data-id=\"2299861c\" data-element_type=\"section\" data-settings=\"{&quot;animation&quot;:&quot;fadeInUp&quot;}\">\n\t\t\t\t\t\t\t<div class=\"elementor-background-overlay\"><\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-21c5ad90\" data-id=\"21c5ad90\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a570a2c breadcrumb elementor-widget elementor-widget-shortcode\" data-id=\"a570a2c\" data-element_type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-shortcode\"><span><span><a href=\"https:\/\/lunitek.it\/wpold\/seismic\/\">HOME<\/a><\/span><\/span><\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-368579bf elementor-widget elementor-widget-heading\" data-id=\"368579bf\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-xxl\">\u00c6MISSION\n<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5c04ea8a elementor-widget elementor-widget-text-editor\" data-id=\"5c04ea8a\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>\u00c6MISSION is a specialized hardware which was developed to get the most from acoustic emission surveys. The software was designed with the help of professors from the Structural department of the Polytechnic University of Turin, who started to experiment with this technology more than 30 years ago.<\/p>\n<h2><strong>HOW ACOUSTIC EMISSION WORKS<\/strong><\/h2>\n<p><strong>Acoustic Emission (AE)&nbsp;<\/strong>is the phenomenon of radiation of acoustic (elastic) waves in solids as a result of damage or irreversible change to&nbsp;the internal structure of the material. Although the name itself suggests an audible signal, this is misleading, because the range of frequencies involved is between 50Khz and up to 1Mhz, practically ultrasonic frequencies.<\/p>\n<p>Typically, the release of elastic energy and therefore AE occurs as result of cracks due to external forces (mechanical loading) or conditions (aging, temperatures).<\/p>\n<p><strong>Acoustic Emission<\/strong>&nbsp;is a very powerful method of surveying when applied to structural health monitoring.<\/p>\n<p>The main applications of the AE technique are:<\/p>\n<ul>\n<li>Localization of cracks in the material<\/li>\n<li>Crack evolution (stable or dangerous)<\/li>\n<li>State of Health monitoring (predictive alarms)<\/li>\n<\/ul>\n<h2><strong>AN INNOVATIVE ACOUSTIC EMISSION<\/strong> SYSTEM<\/h2>\n<p>\u00c6MISSION is a unique acoustic emission data processor and recorder. &nbsp;What makes \u00c6MISSION different is the fact that it samples the analog data and elaborates it onboard, therefore providing the user with only meaningful data contrary to the products that are currently available on the market, which are data recorders that collect massive amount of data at high sampling rates and elaborate them in post-process on a pc.<\/p>\n<p><a href=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/aemission_how_it_works_00.jpg\"><img decoding=\"async\" class=\"alignleft\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/aemission_how_it_works_00-300x162.jpg\" alt=\"\" width=\"300\" height=\"162\"><\/a>In the \u00c6MISSION analog signals, coming from the piezoceramic sensors are first electronically conditioned and level adapted by a cascade of analog filters before they can be converted into digital data. Eight high speed ADCs (1.25MSps@18bit or 5MSpsp@16bit), which are all synchronized to the same clock source, continuously convert the analog signal into digital.<\/p>\n<p>Digital signals are then parallelly acquired and processed by the FPGA and, according to the defined parametrization, only the events that satisfy the setting parameters are transferred to the Linux CPU.<\/p>\n<p>Inside the Linux CPU events are stored locally and can be shared remotely via WiFi or &nbsp;a 4G connection.<\/p>\n<p>The integrated GNSS receiver can synchronize multiple&nbsp;\u00c6MISSION units, and a virtually limitless number of acoustic sensors can be acquired.<\/p>\n<p>\u00c6MISSION is supplied with 8 piezoceramic sensors, the sensing elements were selected and characterized with the help of the Polytechnic University of Turin so as to fulfil the needs of civil structure monitoring and to get the most accurate signals.<\/p>\n<p>Typically, sensors are placed around the area that is to be monitored and connected to the&nbsp;\u00c6MISSION via 10m cables<em>. Longer cables are available with active piezoceramic sensors.<\/em><\/p>\n<h2><strong>INTUITIVE GRAPHS<\/strong><\/h2>\n<p><a href=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/AE_diagrams_2D_plots_ALL_0227_0414.png\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignright\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/AE_diagrams_2D_plots_ALL_0227_0414-300x214.png\" alt=\"\" width=\"409\" height=\"267\"><\/a>After a reasonable period of monitoring, the plots of&nbsp;the parameters are available and&nbsp;are useful to understand the nature of the cracking pattern and to provide an analysis of the monitored structure.<\/p>\n<p>The following graph represents an ongoing survey in a marble quarry.<\/p>\n<p>The following are displayed in order:<\/p>\n<p>&#8211; AE cumulative count <br>&#8211; AE\/hour<br>&#8211; Frequency of events<br>&#8211; Amplitude of events<br>&#8211; <em>\u03b2t<br>&#8211; <\/em>b-value<\/p>\n<p><span style=\"font-size: inherit; text-align: inherit; letter-spacing: -0.015em;\">&#8211; A 3D graph of the emission sources is represented in the below graph.<\/span><\/p>\n<p><a href=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/AE_diagrams_3D_plot_0227_0414-768x449-1.png\"><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/04\/AE_diagrams_3D_plot_0227_0414-768x449-1-300x175.png\" alt=\"\" width=\"403\" height=\"226\"><\/a>Blue squares are the AE sensors, red dots represent the localization of the sources of emissions.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ae73988 elementor-widget elementor-widget-image\" data-id=\"ae73988\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"59\" src=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/05\/AEMISSION-300x59.png\" class=\"attachment-medium size-medium wp-image-953\" alt=\"\" srcset=\"https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/05\/AEMISSION-300x59.png 300w, https:\/\/lunitek.it\/wpold\/seismic\/wp-content\/uploads\/2020\/05\/AEMISSION.png 479w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-49e09bf elementor-widget-divider--view-line_text elementor-widget-divider--element-align-center elementor-widget elementor-widget-divider\" data-id=\"49e09bf\" data-element_type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t\t<span class=\"elementor-divider__text elementor-divider__element\">\n\t\t\t\tKEY FEATURES\t\t\t\t<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6b716a88 elementor-widget elementor-widget-heading\" data-id=\"6b716a88\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Frequency range: 15kHz\u00f7625kHz (18bit) or 15kHz \u00f7 2.5MHz (16bit)<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1584c387 elementor-widget elementor-widget-heading\" data-id=\"1584c387\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Sampling 1.25Msps@18bit or 5Msps@16bit\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-31f8f55 elementor-widget elementor-widget-heading\" data-id=\"31f8f55\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">8-channel BNC input\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6cfaecf9 elementor-widget elementor-widget-heading\" data-id=\"6cfaecf9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">On board computing of AE cumulative count, AE\/hour | Frequency and Amplitude of events\n| \u03b2t and b-value<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-34c89a9 elementor-widget elementor-widget-heading\" data-id=\"34c89a9\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">High Accuracy<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5f8eb97d elementor-widget elementor-widget-heading\" data-id=\"5f8eb97d\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Low Self-Noise\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-78b90412 elementor-widget elementor-widget-heading\" data-id=\"78b90412\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Good Thermal Stability\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e1514ae elementor-widget elementor-widget-heading\" data-id=\"e1514ae\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Low Power\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b4b9860 elementor-widget elementor-widget-heading\" data-id=\"b4b9860\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<div class=\"elementor-heading-title elementor-size-xl\">Robust\n<\/div>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section data-particle_enable=\"false\" data-particle-mobile-disabled=\"false\" class=\"elementor-section elementor-top-section elementor-element elementor-element-1168a10f elementor-section-boxed elementor-section-height-default elementor-section-height-default elementor-invisible\" 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The software was designed with the help of professors from the Structural department of the Polytechnic University of Turin, who started to experiment with this technology more than 30 years ago. HOW ACOUSTIC EMISSION WORKS Acoustic [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":38,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"class_list":["post-742","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ACOUSTIC EMISSION - AEMISSION - Lunitek Backup Seismic 2024<\/title>\n<meta name=\"description\" content=\"Precedente Successivo \u00c6MISSION \u00c6MISSION is a specialized hardware which was developed to get the most from acoustic emission surveys. 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