SU160355A1 - - Google Patents
Info
- Publication number
- SU160355A1 SU160355A1 SU772793A SU772793A SU160355A1 SU 160355 A1 SU160355 A1 SU 160355A1 SU 772793 A SU772793 A SU 772793A SU 772793 A SU772793 A SU 772793A SU 160355 A1 SU160355 A1 SU 160355A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- sensor
- electrodes
- dielectric constant
- base
- insulating material
- Prior art date
Links
- 239000011810 insulating material Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 239000012212 insulator Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003071 parasitic Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Description
Известен электрический высокочастотиый емкостный датчик дл измерени электрических параметров жидкости. Он сотоит из двух, расположенных на одном основании, изол торов электродов, заключенных в общем корпусе , выполненном из изол ционного материала.A high frequency electrical capacitive sensor is known for measuring the electrical parameters of a fluid. It consists of two insulators of electrodes located on one base, which are enclosed in a common case made of an insulating material.
У такого датчика сравнительно низка чувствительность , св занна с большой паразитной емкостью между электродами датчика. .Such a sensor has a relatively low sensitivity associated with a large parasitic capacitance between the sensor electrodes. .
Согласно предлагаемой констрзкции датчика обращенную к контролируемой среде часть поверхности электродов покрывают изол ционным материалом со значительно больщей диэлектрической посто нной, чем диэлектрическа посто нна основани , в котором закреплены электроды.According to the proposed sensor design, the part of the electrode surface facing the controlled medium is covered with insulating material with a significantly larger dielectric constant than the dielectric constant of the base in which the electrodes are fixed.
На чертеже показана принципиальна схема предлагаемого датчика.The drawing shows a schematic diagram of the proposed sensor.
Основание / датчика имеет удобную форму и выполнено из материала с большой химической стойкостью и малой диэлектрической проницаемостью, например фторопласта.The base / sensor has a convenient shape and is made of a material with high chemical resistance and low dielectric constant, for example, fluoroplastic.
Электроды 2, 3 смонтированы в основании и защищены со стороны исследуемой среды пластинками 4 из диэлектрика с большойThe electrodes 2, 3 are mounted at the base and protected from the side of the test medium by plates 4 of a dielectric with a large
диэлектрической проницаемостью (например, Ва Ti Оз).dielectric constant (for example, Ba Ti Oz).
Благодар такой конструкции датчик может примен тьс при непосредственном погружении его в исследуемую среду, при титровании различных жидкостей, измерении абсолютной и относительной величины электропроводности и диэлектрической проницаемости, дл контрол уровн жидкостей.Thanks to this design, the sensor can be used by directly immersing it in the test medium, by titrating various liquids, measuring the absolute and relative values of electrical conductivity and dielectric constant, to monitor the level of liquids.
Предмет изобретени Subject invention
Электрический емкостный бесконтактный датчик дл измерени электрических параметров жидкостей, состо щий из двух, расположенных параллельно на одном основании, изол торов электродов, заключенных в общем корпусе из изол ционного материала, отличающийс тем, что, с целью повыщени чувствительности датчика путем уменьшени паразитной емкости между электродами, обращенна к контролируемой жидкости часть поверхности электродов покрыта изол ционным материалом со значительно большей диэлектрической посто нной, чем материал основани .An electrical capacitive proximity sensor for measuring the electrical parameters of liquids, consisting of two insulators of electrodes arranged in parallel on one base, enclosed in a common body of insulating material, characterized in that, in order to increase the sensitivity of the sensor by reducing the parasitic capacitance between the electrodes The part of the surface of the electrodes facing the controlled liquid is coated with an insulating material with a much larger dielectric constant than the base material.
ffiulS Б2ИffiulS B2I
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU160355A1 true SU160355A1 (en) |
Family
ID=
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3710244A (en) * | 1971-01-11 | 1973-01-09 | G Rauchwerger | Capacitance probe for detecting moisture with very long cables |
| US4354382A (en) * | 1979-06-11 | 1982-10-19 | Ab Rescon | Device for determining the level of melt in a ladle or the like |
| US4422035A (en) * | 1981-12-11 | 1983-12-20 | Extrude Hone Corporation | Capacitance measurement probe |
| WO1986004151A1 (en) * | 1985-01-02 | 1986-07-17 | Bireley Richard L | Soil moisture monitor |
| US4894604A (en) * | 1988-11-03 | 1990-01-16 | Texaco Inc. | Fluid capacitance sensing means and method |
| US5045798A (en) * | 1988-11-21 | 1991-09-03 | Ta Instruments, Inc. | Planar interdigitated dielectric sensor |
| US5095278A (en) * | 1988-11-21 | 1992-03-10 | Ta Instruments, Inc. | Planar interdigitated dielectric sensor |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3710244A (en) * | 1971-01-11 | 1973-01-09 | G Rauchwerger | Capacitance probe for detecting moisture with very long cables |
| US4354382A (en) * | 1979-06-11 | 1982-10-19 | Ab Rescon | Device for determining the level of melt in a ladle or the like |
| US4422035A (en) * | 1981-12-11 | 1983-12-20 | Extrude Hone Corporation | Capacitance measurement probe |
| WO1986004151A1 (en) * | 1985-01-02 | 1986-07-17 | Bireley Richard L | Soil moisture monitor |
| US4894604A (en) * | 1988-11-03 | 1990-01-16 | Texaco Inc. | Fluid capacitance sensing means and method |
| US5045798A (en) * | 1988-11-21 | 1991-09-03 | Ta Instruments, Inc. | Planar interdigitated dielectric sensor |
| US5095278A (en) * | 1988-11-21 | 1992-03-10 | Ta Instruments, Inc. | Planar interdigitated dielectric sensor |
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