Apparatus for determining fill level of a fill substance in a container with process isolation having at least two plastics
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
G01L-023/00
G01F-023/284
H01Q-001/22
H01Q-013/02
출원번호
US-0032356
(2014-11-03)
등록번호
US-10113899
(2018-10-30)
우선권정보
DE-10 2013 113 642 (2013-12-06)
국제출원번호
PCT/EP2014/073518
(2014-11-03)
국제공개번호
WO2015/082146
(2015-06-11)
발명자
/ 주소
Bergmann, Eric
Feisst, Sr., Klaus
출원인 / 주소
ENDRESS+HAUSER SE+CO. KG
대리인 / 주소
Bacon & Thomas, PLLC
인용정보
피인용 횟수 :
0인용 특허 :
9
초록▼
An apparatus for determining or monitoring the fill level of a fill substance located in a container in a process, comprising: a signal producing unit; an in-coupling/out-coupling unit an antenna unit; wherein the antenna unit has a hollow conductor and an antenna element widening toward the fill su
An apparatus for determining or monitoring the fill level of a fill substance located in a container in a process, comprising: a signal producing unit; an in-coupling/out-coupling unit an antenna unit; wherein the antenna unit has a hollow conductor and an antenna element widening toward the fill substance and the antenna unit transmits high-frequency measuring signals in the direction of the surface of the fill substance and receives echo signals reflected on the surface of the fill substance; and a control/evaluation unit, which ascertains the fill level of the fill substance in the container based on travel time of the measuring signals. In or on the antenna unit a process isolation is provided, which is at least approximately transparent for the high-frequency measuring signals and which protects the in-coupling/out-coupling unit against influences of the process. The process isolation is an isostatically pressed, molded part, which is manufactured of at least two plastics having different physical and/or chemical properties.
대표청구항▼
1. An apparatus for determining or monitoring the fill level of a fill substance located in a container in a process, comprising: a signal producing unit, which produces high-frequency measuring signals;an in-coupling/out-coupling unit, which couples the high-frequency measuring signals into an ante
1. An apparatus for determining or monitoring the fill level of a fill substance located in a container in a process, comprising: a signal producing unit, which produces high-frequency measuring signals;an in-coupling/out-coupling unit, which couples the high-frequency measuring signals into an antenna unit, respectively out of the antenna unit; said antenna unit has a hollow conductor and an antenna element widening toward the fill substance; andsaid antenna unit transmits the high-frequency measuring signals in the direction of the surface of the fill substance and receives echo signals reflected on the surface of the fill substance; anda control/evaluation unit, which ascertains the fill level of the fill substance in the container based on travel time of the measuring signals, wherein:in or on said antenna unit a process isolation is provided, which is at least approximately transparent for the high-frequency measuring signals and which protects said in-coupling/out-coupling unit against influences of the process;said process isolation is an isostatically pressed, molded part, which is manufactured of at least two plastics having different physical and/or chemical properties; andeach of said at least two plastics is provided in respectively defined regions of said process isolation. 2. The apparatus as claimed in claim 1, wherein: said two plastics comprise a first plastic having a first dielectric constant (DK1) and a second plastic having a second dielectric constant (DK2); andsaid two dielectric constants (DK1, DK2) are at least approximately equal. 3. The apparatus as claimed in claim 1, wherein: said process isolation is embodied gas tightly. 4. The apparatus as claimed in claim 1, wherein: said first plastic has a higher temperature, pressure- and/or chemical durability than said second plastic. 5. The apparatus as claimed in claim 4, wherein: said first plastic with the higher temperature, pressure- and/or chemical durability is arranged in the defined region of said process isolation, which faces the process, respectively contacts the process. 6. The apparatus as claimed in claim 5, wherein: the defined region, in which said first plastic is arranged, is essentially embodied as a surface layer. 7. The apparatus as claimed in claim 1, wherein: the thickness of the surface layer of said first plastic amounts preferably to λ/4, wherein λ is the wavelength of the high-frequency measuring signals or the center wavelength of a pulse of the high-frequency measuring signals. 8. The apparatus as claimed in claim 1, wherein: said process isolation has a gasket, which is composed of said first plastic or a third plastic, which has a high temperature- and chemical durability comparable to that of said first plastic; andthe diameter of said gasket is greater than the maximum diameter of said antenna element. 9. The apparatus as claimed in claim 8, wherein: said first plastic or said third plastic is PTFE or PEEK and said second plastic is PP. 10. The apparatus as claimed in claim 8, wherein: electrically conductive particle are introduced into said first plastic and/or the said third plastic.
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이 특허에 인용된 특허 (9)
Reimelt, Ralf; Osswald, Dirk, Apparatus for ascertaining and monitoring fill level of medium in a container.
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