JPS5761918A - Level sensor - Google Patents
Level sensorInfo
- Publication number
- JPS5761918A JPS5761918A JP13789280A JP13789280A JPS5761918A JP S5761918 A JPS5761918 A JP S5761918A JP 13789280 A JP13789280 A JP 13789280A JP 13789280 A JP13789280 A JP 13789280A JP S5761918 A JPS5761918 A JP S5761918A
- Authority
- JP
- Japan
- Prior art keywords
- frequency
- detector
- coil
- coaxial cable
- inductive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/26—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring variations of capacity or inductance of capacitors or inductors arising from the presence of liquid or fluent solid material in the electric or electromagnetic fields
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Thermal Sciences (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
PURPOSE:To eliminate the use of a high frequency coaxial cable and furthermore to simplify the wiring as well as to realize a control from a remote place, by providing a signal applying circuit separately from a high-frequency generating part and a base circuit. CONSTITUTION:A high-frequency signal given from a detector 7 produces an inductive frequency to an induction coil L3 via a main coil L2. A high frequency is attenuated when the inductive frequency is approximate to the high frequency applied from a high-frequency generating part 3 of a control part 2. Based on this attenuation of high frequency, a relay RY is actuated. Then a signal applying circuit 6 that applies the high-frequency signal current given from the detector 7 is installed separaely from the part 3 and a base circuit 5 including the coil L3. Accordingly, a connection line 8 between the detector 7 and the part 2 receives no external effect, which eliminates the use of a high-frequency coaxial cable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13789280A JPS5761918A (en) | 1980-10-01 | 1980-10-01 | Level sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13789280A JPS5761918A (en) | 1980-10-01 | 1980-10-01 | Level sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5761918A true JPS5761918A (en) | 1982-04-14 |
Family
ID=15209109
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13789280A Pending JPS5761918A (en) | 1980-10-01 | 1980-10-01 | Level sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5761918A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014238766A (en) * | 2013-06-10 | 2014-12-18 | 日本電信電話株式会社 | Sensor circuit |
JP2014238765A (en) * | 2013-06-10 | 2014-12-18 | 日本電信電話株式会社 | Array sensor circuit |
-
1980
- 1980-10-01 JP JP13789280A patent/JPS5761918A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2014238766A (en) * | 2013-06-10 | 2014-12-18 | 日本電信電話株式会社 | Sensor circuit |
JP2014238765A (en) * | 2013-06-10 | 2014-12-18 | 日本電信電話株式会社 | Array sensor circuit |
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