{"id":916,"date":"2020-06-11T10:13:01","date_gmt":"2020-06-11T07:13:01","guid":{"rendered":"https:\/\/sites.uef.fi\/inverse\/?page_id=916"},"modified":"2023-08-22T15:30:46","modified_gmt":"2023-08-22T12:30:46","slug":"measurement-system-development","status":"publish","type":"page","link":"https:\/\/sites.uef.fi\/inverse\/research-areas\/measurement-system-development\/","title":{"rendered":"Measurement System Development"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">Measurement System Development<\/h1>\n\n\n\n<p>The measurement system development in our lab started in 1995 when the first electrical impedance tomography (EIT) measurement system, nowadays called KIT1 (Kuopio Impedance Tomograph 1),was completed. It was a 16 electrode EIT device mainly used for two dimensional studies. Later, the system was extended with a &#8220;manual multiplexer&#8221; shown in the figure below, so that it could also be used for 3D imaging.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"450\" height=\"338\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT1.jpg\" alt=\"A KIT1 EIT measurement system with the manual multiplexer.\" class=\"wp-image-1078\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT1.jpg 450w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT1-300x225.jpg 300w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><\/figure>\n\n\n\n<p>Figure: A KIT1 EIT measurement system with the manual multiplexer.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">KIT2 Electrical impedance tomography measurement system<\/h1>\n\n\n\n<p>The next step from KIT1 was the design of KIT2. It has 16 parallel or 96 semiparallel measurement channels and 16 parallel or 96 semiparallel injection channels. More information about KIT2 system can be found from <a href=\"http:\/\/epublications.uef.fi\/pub\/urn_isbn_978-951-27-1096-6\/urn_isbn_978-951-27-1096-6.pdf\">PhD Thesis (in Finnish)<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"520\" height=\"345\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT2.jpg\" alt=\"KIT2 is used with multiplexer unit and is connected to a mixing system.\" class=\"wp-image-1081\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT2.jpg 520w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT2-300x199.jpg 300w\" sizes=\"auto, (max-width: 520px) 100vw, 520px\" \/><\/figure>\n\n\n\n<p>Figure: In this photo, KIT2 is used with multiplexer unit and is connected to a mixing system.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">KIT3 Electrical impedance tomography measurement system<\/h1>\n\n\n\n<p>KIT3 was designed mainly for conductivity probe measurements. It has 64 serial measurement channels and 4 parallel injection channels.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"461\" height=\"345\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT3.jpg\" alt=\"KIT3 connected to a flow pipe loop. \" class=\"wp-image-1066\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT3.jpg 461w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT3-300x225.jpg 300w\" sizes=\"auto, (max-width: 461px) 100vw, 461px\" \/><\/figure>\n\n\n\n<p>Figure: KIT3 connected to a flow pipe loop. <span id=\"line-23\" class=\"anchor\"><\/span><span id=\"line-24\" class=\"anchor\"><\/span><\/p>\n\n\n\n<h1 class=\"wp-block-heading\">KIT4 Electrical impedance tomography measurement system<\/h1>\n\n\n\n<p>KIT4 is the latest EIT device designed and constructed in our group. KIT4 has 80 parallel voltage measurement channels and 16 parallel current injection channels. The maximum frame rate of KIT4 is 100 frames\/second when using 16 measurement channels. More detailed information about the KIT4 device can be found <a href=\"http:\/\/iopscience.iop.org\/0957-0233\/20\/1\/015503\/\">in this publication.<\/a><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"384\" height=\"427\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT4.jpg\" alt=\"KIT4 connected to a stirred vessel. \" class=\"wp-image-1069\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT4.jpg 384w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_KIT4-270x300.jpg 270w\" sizes=\"auto, (max-width: 384px) 100vw, 384px\" \/><\/figure>\n\n\n\n<p>Figure: KIT4 connected to a stirred vessel.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Thermal tomography measurement system<\/h1>\n\n\n\n<p>In the thermal tomography measurement setup, surface temperature evolution caused by a thermal stimulation is measured. The thermal stimulation is achieved by applying a pulse heating using heating resistors and the surface temperature is measured using thermistors. For more on the theremal tomography image reconstruction, see Thermal tomography.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"324\" height=\"243\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_P1010526w.jpg\" alt=\"A prototype version including 8 independently controllable heating elements and 16 temperature measuring thermistors. \" class=\"wp-image-1072\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_P1010526w.jpg 324w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_P1010526w-300x225.jpg 300w\" sizes=\"auto, (max-width: 324px) 100vw, 324px\" \/><\/figure>\n\n\n\n<p>Figure: A prototype version including 8 independently controllable heating elements and 16 temperature measuring thermistors.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Electromagnetic flow tomography (EMFT) measurement system<\/h1>\n\n\n\n<p>Electromagnetic flow tomography is an emerging imaging modality for estimating velocity fields of conductive flowing fluids in pipes. The approach behind the EMFT is the creation of magnetic field into the pipe flow, causing en electric field indside the pipe due to the moving charges. This electric field, or potential distribution, can be measured on the inside boundary of the pipe using a set of electrodes. In our lab, we have designed and built an EMFT system incuding four excitation coils with 16 voltage measurement electrodes. With the setup, we are able to estimate 2D velocity fields of conductive fluid flows in process pipes.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"335\" height=\"596\" src=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_EMFT.jpg\" alt=\"An EMFT measurement system with four coils and 16 electrodes. \" class=\"wp-image-1075\" srcset=\"https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_EMFT.jpg 335w, https:\/\/sites.uef.fi\/inverse\/wp-content\/uploads\/sites\/43\/2020\/06\/MeasurementSystemDevelopment_EMFT-169x300.jpg 169w\" sizes=\"auto, (max-width: 335px) 100vw, 335px\" \/><\/figure>\n\n\n\n<p>Figure: An EMFT measurement system with four coils and 16 electrodes.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Contact<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/uefconnect.uef.fi\/en\/person\/marko.vauhkonen\/\">Marko Vauhkonen<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/uefconnect.uef.fi\/en\/person\/tuomo.savolainen\/\">Tuomo Savolainen<\/a><\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Past and present collaborators<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Icraft Oy<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Measurement System Development The measurement system development in our lab started in 1995 when the first electrical impedance tomography (EIT) measurement system, nowadays called KIT1 (Kuopio Impedance Tomograph 1),was completed. It was a 16 electrode EIT device mainly used for two dimensional studies. Later, the system was extended with a &#8220;manual multiplexer&#8221; shown in the [&hellip;]<\/p>\n","protected":false},"author":90,"featured_media":0,"parent":56,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-916","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Measurement System Development - Inverse Problems Research Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sites.uef.fi\/inverse\/research-areas\/measurement-system-development\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Measurement System Development - Inverse Problems Research Group\" \/>\n<meta property=\"og:description\" content=\"Measurement System Development The measurement system development in our lab started in 1995 when the first electrical impedance tomography (EIT) measurement system, nowadays called KIT1 (Kuopio Impedance Tomograph 1),was completed. 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