PL115277B1 - Sensing element designated to measure solid materials moisture content by means of electric method - Google Patents

Sensing element designated to measure solid materials moisture content by means of electric method Download PDF

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Publication number
PL115277B1
PL115277B1 PL20233177A PL20233177A PL115277B1 PL 115277 B1 PL115277 B1 PL 115277B1 PL 20233177 A PL20233177 A PL 20233177A PL 20233177 A PL20233177 A PL 20233177A PL 115277 B1 PL115277 B1 PL 115277B1
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PL
Poland
Prior art keywords
electrodes
sensor
moisture content
solid materials
electric method
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Application number
PL20233177A
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Polish (pl)
Other versions
PL202331A1 (en
Inventor
Ryszard Jachowicz
Marek Lepa
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Politechnika Warszawska
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Application filed by Politechnika Warszawska filed Critical Politechnika Warszawska
Priority to PL20233177A priority Critical patent/PL115277B1/en
Publication of PL202331A1 publication Critical patent/PL202331A1/en
Publication of PL115277B1 publication Critical patent/PL115277B1/en

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Description

Przedmiotem wynalazku jest czujnik do pomiaru wilgotnosci materialów stalych metoda elektryczna, zwlaszcza ziarnistych, sypkich, granulowanych oraz materialów wlóknistych. W znanych czujnikach tego typu stosowano elektrody plaskie, lezace naprzeciwko siebie, elektrody plaskie grzebieniowe, elektrody cylindryczne wspólosiowe, czy elektrody iglowe. Czujniki te posiadaja szereg wad takich jak trudnosci z odpowiednim zageszczeniem materialu badanego, trudnosci przy pomiarach ciaglych oraz przy pomiarach materialów w postaci cienkich warstw.W czujniku wedlug wynalazku wprowadzono elektrody grzebieniowo-cylindryczne. Elektrody te osadzone sa w korpusie czujnika, który posiada otwór cylindryczny. Powierzchnia tego otworu utworzona jest z powierz¬ chni elektrod oddzielonych powierzchniami z materialu izolacyjnego.Dzieki takiej budowie eliminuje sie wiekszosc wad dotychczas stosowanych czujników, zachowujac wszystkie zalety czujnijca cylindrycznego i czujnika o elektrodach grzebieniowych. Poza tym konstrukcja wedlug wynalazku zapewnia duza trwalosc czujnika przy wielokrotnych pomiarach, latwy sposób napelniania i zageszczania badanego materialu, prosty i szybki sposób oprózniania czujnika, mozliwosc zastosowania go przy pomiarach ciaglych. »¦ Przedmiot wynalazku uwidoczniony jest w przykladzie wykonania na rysunku, na którym fig. 1 i fig. 3 przedstawia dwie wersje rozwiazania czujnika wedlug wynalazku w widoku z góry oraz fig. 2 i fig. 4 przedstawia te rozwiazania w przekroju AA. Czujnik przedstawiony na fig. 1 i fig. 2 posiada korpus 1 w postaci walca wyko¬ nany z materialu przewodzacego prad elektryczny. W korpusie 1 osadzone sa trzy elektrody 2 z materialu prze¬ wodzacego elektrycznosc, - otoczone materialem izolacyjnym 3. Korpus 1, z osadzonymi w nim elektrodami 2 posiada otwór cylindryczny, którego powierzchnia utworzona jest z umieszczonych naprzemian prostokatnych powierzchni elektrod i korpusu, przedzielonych materialem izolacyjnym. Zwarte elektrody 2 stanowia elektrody gorace czujnika, elektroda zimna jest korpus.Czujnik przedstawiony na fig. 3 i fig. 4 posiada korpus la w postaci walca z koncentrycznym otworem cylindrycznym. Korpus la wykonany jest z materialu nieprzewodzacego pradu elektrycznego. W korpusie la osadzonych jest szesc elektrod 2a, przy czym powierzchnia otworu cylindrycznego utworzona jest z powierzchni2 115 277 prostokatnych elektrod 2a oddzielonych powierzchniami prostokatnymi korpusu la. Dla dokonania pomiaru umieszcza sie badany material w czujniku oraz podlacza do znanego ukladu pomiarowego mieizacego parametr elektryczny bedacy funkcja wilgotnosci badanego materialu, np. pojemnosc czy rezystancje.Zastrzezenia patentowe 1. Czujnik do pomiaru wilgotnosci materialów stalych metoda elektryczna, znamienny tym, ze posiada korpus (1) z otworem cylindrycznym, w którym to korpusie osadzone sa cylindryczno-grzebieniowe elektrody (2), przy czym na powierzchni otworu korpusu umieszczone sa powierzchnie tych elektrod. 2. Czujnik wedlug zastrz. 1, z n a m i e n ny tym, ze elektrody (2) w liczbie (2n-l), gdzie n = 2,3,4..., osadzone sa w korpusie (1) wykonanym z materialu przewodzacego prad elektryczny i odizolowane sa elektry¬ cznie od niego na calej powierzchni styku. 3. Czujnik wedlug zastrz. 1, znamienny tym, ze elektrody (2) w liczbie 2(2n-l), gdzie n = 2,3,4,.., osadzone sa w korpusie (1) wykonanym z materialu nieprzewodzacego pradu elektrycznego.Fig.1 A-A 1 2 3 Fig. 1 A-A k Za 2a Fig.4 Zaklad Wydawniczo-Poligraficzny WFL Zam. 497. Naklad 110 Cena 100 zl PLThe subject of the invention is a sensor for measuring the moisture content of solid materials by the electric method, especially of granular, loose, granular and fibrous materials. Known sensors of this type used flat electrodes lying opposite each other, flat comb electrodes, coaxial cylindrical electrodes or needle electrodes. These sensors have a number of disadvantages, such as difficulties with proper concentration of the test material, difficulties in continuous measurements and when measuring materials in the form of thin layers. In the sensor according to the invention, comb-cylindrical electrodes were introduced. These electrodes are embedded in the sensor body which has a cylindrical bore. The surface of this hole is made of the surface of the electrodes separated by surfaces of insulating material. This structure eliminates most of the disadvantages of the previously used sensors, while retaining all the advantages of the cylindrical sensor and the sensor with comb electrodes. In addition, the design according to the invention provides a long life of the sensor with multiple measurements, an easy way to fill and compact the tested material, a simple and quick way to empty the sensor, and the possibility of using it for continuous measurements. The subject of the invention is illustrated in the example of the embodiment in the drawing, in which fig. 1 and fig. 3 show two versions of the sensor solution according to the invention in top view, and fig. 2 and fig. 4 show these solutions in section AA. The sensor shown in FIGS. 1 and 2 has a cylinder-shaped body 1 made of an electrically conductive material. In the body 1 there are three electrodes 2 made of an electrically conductive material, surrounded by an insulating material 3. The body 1 with the electrodes 2 embedded in it has a cylindrical opening, the surface of which is formed by alternating rectangular surfaces of the electrodes and the body, separated by insulating material . The short-circuited electrodes 2 constitute the hot electrodes of the sensor, the cold electrode is the body. The sensor shown in Figs. 3 and 4 has a cylinder body 1a with a concentric cylindrical bore. The body la is made of an electrically non-conductive material. Six electrodes 2a are embedded in the body la, the surface of the cylindrical opening is formed by the surface of the rectangular electrodes 2a separated by the rectangular surfaces of the body 1a. In order to perform the measurement, the tested material is placed in the sensor and connected to a known measuring system measuring an electrical parameter that is a function of the tested material humidity, e.g. capacity or resistance. Patent claims 1. Sensor for measuring the moisture of solid materials, an electric method, characterized by the fact that it has a body ( 1) with a cylindrical bore, in which the barrel-comb electrodes (2) are mounted, and the surfaces of these electrodes are placed on the surface of the bore of the body. 2. Sensor according to claim 1, characterized in that the electrodes (2) in the number (2n-1), where n = 2,3,4 ..., are embedded in the body (1) made of an electrically conductive material and are electrically isolated from it over the entire contact area. 3. Sensor according to claim Fig. 1, characterized in that the electrodes (2) in the number 2 (2n-1), where n = 2,3,4, .., are embedded in the body (1) made of a non-conductive material. Fig. 1 AA 1 2 3 Fig. 1 AA k Za 2a Fig. 4 WFL Publishing and Printing Company Order. 497. Mintage 110 Price PLN 100 PL

Claims (4)

Zastrzezenia patentowe 1. Czujnik do pomiaru wilgotnosci materialów stalych metoda elektryczna, znamienny tym, ze posiada korpus (1) z otworem cylindrycznym, w którym to korpusie osadzone sa cylindryczno-grzebieniowe elektrody (2), przy czym na powierzchni otworu korpusu umieszczone sa powierzchnie tych elektrod. Claims 1. A sensor for measuring the moisture content of solid materials by electric method, characterized in that it has a body (1) with a cylindrical bore, in which the body is mounted cylindrical-comb electrodes (2), and the surfaces of these electrodes. 2. Czujnik wedlug zastrz. 1, z n a m i e n ny tym, ze elektrody (2) w liczbie (2n-l), gdzie n = 2,3,4..., osadzone sa w korpusie (1) wykonanym z materialu przewodzacego prad elektryczny i odizolowane sa elektry¬ cznie od niego na calej powierzchni styku. 2. Sensor according to claim 1, characterized in that the electrodes (2) in the number (2n-1), where n = 2,3,4 ..., are embedded in the body (1) made of an electrically conductive material and are electrically isolated from it over the entire contact area. 3. Czujnik wedlug zastrz. 1, znamienny tym, ze elektrody (2) w liczbie 2(2n-l), gdzie n = 2,3,4,.., osadzone sa w korpusie (1) wykonanym z materialu nieprzewodzacego pradu elektrycznego. Fig.1 A-A 1 2 3 Fig. 1 A-A k Za 2a Fig.3. Sensor according to claim The method of claim 1, characterized in that the electrodes (2) in number 2 (2n-1), where n = 2,3,4, .., are embedded in the body (1) made of a non-conductive material. Fig. 1 A-A 1 2 3 Fig. 1 A-A k Za 2a Fig. 4 Zaklad Wydawniczo-Poligraficzny WFL Zam. 497. Naklad 110 Cena 100 zl PL4 WFL Publishing and Printing Company Order. 497. Mintage 110 Price PLN 100 PL
PL20233177A 1977-11-23 1977-11-23 Sensing element designated to measure solid materials moisture content by means of electric method PL115277B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL20233177A PL115277B1 (en) 1977-11-23 1977-11-23 Sensing element designated to measure solid materials moisture content by means of electric method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PL20233177A PL115277B1 (en) 1977-11-23 1977-11-23 Sensing element designated to measure solid materials moisture content by means of electric method

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PL202331A1 PL202331A1 (en) 1979-06-04
PL115277B1 true PL115277B1 (en) 1981-03-31

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PL202331A1 (en) 1979-06-04

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